CN108579309B

CN108579309B - Oil smoke waste gas pretreatment system and method

Info

Publication number: CN108579309B
Application number: CN201810732249.XA
Authority: CN
Inventors: 岳仁亮; 齐丛亮; 吴傲立; 梁青宝
Original assignee: Jiangsu Zhongke Ruisai Pollution Control Engineering Co ltd; Institute of Process Engineering of CAS
Current assignee: Jiangsu Zhongke Ruisai Pollution Control Engineering Co ltd; Institute of Process Engineering of CAS
Priority date: 2018-07-05
Filing date: 2018-07-05
Publication date: 2024-04-16
Anticipated expiration: 2038-07-05
Also published as: CN108579309A

Abstract

The invention provides a system and a method for preprocessing oil smoke and waste gas, wherein the system for preprocessing the oil smoke and waste gas comprises a spraying unit and an oil removing unit which are sequentially arranged along the flowing direction of the oil smoke and waste gas to be processed; the oil removing unit comprises a first metal filtering oil removing module and a second metal filtering oil removing module which are sequentially arranged along the flowing direction of the waste gas to be treated, and the first metal filtering oil removing module comprises a first metal wire mesh; the second metal filtering and degreasing module comprises a second metal wire mesh; the power unit is used for driving the first wire mesh and the second wire mesh to rotate; and a regeneration unit. The system and the method for pretreatment of the oil smoke and the waste gas can treat the oil smoke and the waste gas efficiently and continuously, have low water consumption, small waste water quantity, low requirements on components of the waste gas, large treatment gas quantity, can perform online regeneration and continuous operation, do not need manual cleaning work, and are particularly suitable for waste gas containing oil components with different concentrations and dust-containing waste gas.

Description

Oil smoke waste gas pretreatment system and method

Technical Field

The invention belongs to the technical field of environmental purification, and relates to a lampblack waste gas pretreatment system and a lampblack waste gas pretreatment method.

Background

Kitchen fume contains a plurality of substances which are seriously harmful to human bodies, and the probability of people suffering from lung cancer can be increased. Many middle-size and small-size restaurants in the city directly discharge waste gas outdoors, oil dirt formed by oil smoke condensation and deposition can influence the attractiveness and the urban volume of the city, and the oil smoke is discharged without treatment to seriously deteriorate the surrounding environment and harm the human health.

In the oil removal operation technology for the oil smoke waste gas, the treatment method has a plurality of varieties, such as: physically intercepting oil removal, bag-shaped filtering oil removal, water washing oil removal and the like.

The physical interception oil removal operation is not efficient in removing oil, and requires periodic manual cleaning operations.

The bag type oil separation has obvious oil separation effect, but the oil in the oil smoke can be coagulated to block the bag mouth after long-time use, thereby increasing the gas flow resistance and having certain potential safety hazard.

The washing deoiling is as CN 204373021U disclosed an air oil fume purifying processor, comprising: the oil filtering tank is internally provided with a transverse plate, the transverse plate is provided with a hole, and the tank wall at the lower part of the oil filtering tank is provided with a water outlet; the water spraying head is arranged in the oil filtering groove and is provided with a water inlet pipeline; an air inlet pipe and an air outlet pipe, wherein the air inlet pipe is communicated with the lower part of the oil filtering groove, and the air outlet pipe is communicated with the upper part of the oil filtering groove; the exhaust fan is arranged on a path of the air outlet pipe communicated with the oil filtering groove; the bottom wall of the water collecting tank is positioned below the horizontal plane of the bottom wall of the oil filtering tank, a water pumping unit is arranged in the water collecting tank, and a water inlet pipeline of the water spraying head is communicated with the water pumping unit; the bottom wall of the barrel body is positioned below the horizontal plane of the bottom wall of the oil filtering groove, the barrel body is communicated with the water outlet, the lower part of the barrel body is communicated with the water collecting groove, and an oil discharge pipe is arranged on the side wall of the upper section of the barrel body. The oil smoke is separated by washing, so that the air passing through the oil smoke is cleaner. Meanwhile, by means of the arrangement of a water outlet and a barrel body, the cleaned waste oil is concentrated in the barrel body, and the waste oil is intensively recycled by flowing out of an oil discharge pipe when the waste oil is accumulated to a certain height by utilizing the characteristic that the oil floats on an upper layer of water, so that the purposes of purifying air and recycling waste are achieved. Although the water washing oil removal has a certain effect, the water washing process has higher requirements on gas-liquid contact, a large amount of water is consumed, the treated wastewater is large, and the use cost is additionally increased under the condition of lower oil content.

Therefore, the fume exhaust gas treatment device is still to be further improved so as to improve the fume treatment efficiency.

Disclosure of Invention

Aiming at the defects existing in the prior art, the invention aims to provide the oil fume waste gas pretreatment system and the method, which can treat the oil fume waste gas efficiently and continuously, have low water consumption, small waste water quantity, low requirements on the components of the waste gas, large treatment gas quantity, can perform online regeneration continuous operation, do not need manual cleaning work, and are particularly suitable for waste gas containing oil components with different concentrations and dust-containing waste gas.

To achieve the purpose, the invention adopts the following technical scheme:

the invention aims to provide an oil smoke waste gas pretreatment system, which comprises a spraying unit and an oil removal unit which are sequentially arranged along the flowing direction of oil smoke waste gas to be treated;

the spraying unit is used for spraying the oil smoke waste gas to be treated;

the oil removing unit comprises a first metal filtering oil removing module and a second metal filtering oil removing module which are sequentially arranged along the flowing direction of the waste gas to be treated, wherein the first metal filtering oil removing module comprises a first metal wire mesh; the second metal filtering and degreasing module comprises a second metal wire mesh;

The lampblack waste gas pretreatment system further comprises:

the power unit is used for driving the first wire mesh and the second wire mesh to rotate, and the rotation direction is not parallel to the flow direction of the oil smoke waste gas to be treated; and, a step of, in the first embodiment,

and the regeneration unit is used for cleaning the oil removal unit.

The oil smoke waste gas pretreatment system provided by the invention is characterized in that a spray unit is adopted to pretreat the oil smoke waste gas, the liquid-solid contact capacity of the waste gas is increased, small part of large-particle-size oil content in the oil smoke waste gas is removed, and then most of the oil content in the oil smoke waste gas is removed through a dynamic oil removal unit; the dynamic unit adhered with the oil is regenerated by the regeneration unit and reused for oil removal. The pretreatment of the spraying unit and the movement of the first wire mesh and the second wire mesh in the dynamic oil removing unit are combined, so that the oil removing efficiency of the oil smoke waste gas pretreatment device is greatly improved.

The oil smoke waste gas pretreatment system can continuously treat oil smoke waste gas, has low water consumption, small waste water amount, low requirements on components of the waste gas and large treatment gas amount, can perform online regeneration continuous operation, does not need manual cleaning work, and is particularly suitable for waste gas containing oil components with different concentrations and dust-containing waste gas.

The spraying unit comprises an atomization spraying device. The spraying unit can only play a role in spraying the oil smoke waste gas, and other devices capable of achieving the purpose can also be used.

Preferably, the atomizing spray device comprises an atomizing nozzle and a water inlet pipe, and the atomizing nozzle is connected with the water inlet pipe in a threaded fastening mode.

Preferably, the atomizing nozzles are arranged in a linear manner.

The average pore diameter of the first wire mesh is 0.1-10mm, such as 0.2mm, 0.5mm, 0.8mm, 1.0mm, 1.5mm, 2.5mm, 3.8mm, 4.6mm, 5.8mm, 6.2mm, 7.0mm, 8.4mm, 9.2mm, etc.

Preferably, the average pore size of the second wire mesh is 0.2 to 0.6 times, such as 0.25 times, 0.3 times, 0.4 times, 0.5 times, 0.54 times or 0.58 times the average pore size of the first wire mesh. The average pore diameters of the second wire mesh and the first wire mesh are in the range, and the oil removing capacity of the oil smoke waste gas pretreatment system is strongest and can reach more than 90%.

Preferably, the first wire mesh and the second wire mesh are independently made of wires having a diameter of 0.1-1.0mm, such as 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm or 0.9mm, etc.

Preferably, the metal wire is selected from any one or a combination of at least two of copper wire, aluminum alloy wire, aluminum wire, stainless steel 304 wire or stainless steel 316 wire, such as copper wire and aluminum wire, aluminum alloy wire and copper wire, aluminum wire, stainless steel 304 wire and stainless steel 316 wire, typically but not limited to.

The power unit comprises a first power device, a first rotating piece and a second rotating piece, wherein the first rotating piece and the second rotating piece are respectively connected with the first power device, the first rotating piece drives the first wire mesh to rotate, and the second rotating piece drives the second wire mesh to rotate.

Preferably, the first power means comprises an electric motor. The first power unit may be one power unit or a plurality of power units, such as 2, 4 or 6 power units. Those skilled in the art will choose from the actual needs.

Preferably, the first and second rotating members independently comprise gears. The first and second rotary members are provided for the purpose of imparting a certain movement speed to the first and second wire meshes, respectively, so as to rotate them, as long as they are capable of doing so, other components than gears may be used herein.

Preferably, the power unit further comprises a first transfer member coupled to the first rotating member and a second transfer member coupled to the second rotating member, the first wire mesh being secured to the first transfer member and the second wire mesh being secured to the second transfer member.

Preferably, a first support member is further arranged between the first wire mesh and the first transfer member, and the thickness of the first support member is 2-10 times, such as 2.5 times, 3.0 times, 3.5 times, 3.8 times, 4.6 times, 5.8 times, 6.5 times, 6.9 times, 7.8 times, 8.2 times or 9.5 times, etc., the average pore size of the first wire mesh. The thickness of the first supporting piece is in the range, the oil removing effect of the first metal filtering oil removing module is best, the service life is longest, the cost is lowest, and the load of the power device is lowest.

Preferably, a second support member is further arranged between the second wire mesh and the second transfer member, the thickness of the second support member being 2-10 times, such as 2.5 times, 3.0 times, 3.5 times, 3.8 times, 4.6 times, 5.8 times, 6.5 times, 6.9 times, 7.8 times, 8.2 times or 9.5 times, etc., the average pore size of the second wire mesh. The thickness of the second supporting piece is in the range, the oil removing effect of the second metal filtering oil removing module is best, the service life is longest, the cost is lowest, and the load of the power device is lowest.

Preferably, the first and second supports independently comprise a stainless steel wire mesh, the first and second supports functioning to secure the first and second wire mesh to the first and second conveyor members, respectively, and to enable gas to flow therethrough, not only comprising a stainless steel wire mesh, but also other objects capable of achieving this function.

Preferably, the first and second conveyor members independently comprise a chain. The first and second conveying members are provided for the purpose of facilitating the rotation of the first and second wire mesh attached to the first and second conveying members, respectively, and may be an object capable of achieving this function, not only including the chain, but also a gas through which a gas flows.

The regeneration unit is used for removing the oil in the oil removing unit adsorbed with the oil so as to adsorb the oil again.

The regeneration unit comprises a first cleaning tank, a second cleaning tank, a cleaning liquid supply device, an aeration device, an oil scraping device and a second power device, wherein the first cleaning tank is positioned at the lower part of the first oil removal module, the second cleaning tank is positioned at the lower part of the second oil removal module, the first cleaning tank and the second cleaning tank are respectively provided with a liquid inlet pipe, a part of structures of the aeration device and a part of structures of the oil scraping device, the liquid inlet pipes are connected with the cleaning liquid supply device, and the aeration device and the oil scraping device are connected with the second power device.

The regeneration process of the regeneration unit comprises the following steps: the first wire mesh and the second wire mesh are respectively rotated into a first cleaning tank and a second cleaning tank which are filled with cleaning liquid, oil absorbed by the first wire mesh and the second wire mesh is transferred into the cleaning liquid under the aeration action of the cleaning liquid and the aeration device, the oil in the cleaning liquid is regenerated, the oil in the cleaning liquid floats to the surface of the liquid, and the oil on the surface is scraped by the oil scraping device.

Preferably, the second power means comprises an electric motor. The second power unit may be one unit or a plurality of units, such as 2 or 5 units, etc., and may be selected as desired by those skilled in the art.

Preferably, the installation height of the liquid inlet pipe is 1/2-3/4, such as 5/8, of the height of the oil drain. The oil drain port is an outlet of the oil cleaned by the cleaning tank.

Preferably, the aeration device is a main pipe-branch pipe aeration structure. The aeration device comprises a fan and an air pipeline, and an aeration port is arranged on the air pipeline.

Preferably, the aeration device has an aeration gap of 0.1 to 1 times, such as 0.2 times, 0.3 times, 0.4 times, 0.5 times, 0.6 times, 0.7 times, 0.8 times, or 0.9 times the total pipe length.

Preferably, the aeration openings of the aeration device are inclined at an angle of 10 ° -45 °, such as 15 °, 18 °, 20 °, 25 °, 30 °, 32 °, 38 °, etc., to the horizontal plane.

Preferably, the aeration openings of the aeration device are spaced from the first wire mesh or the second wire mesh by a distance of 5-20mm, such as 6mm, 8mm, 10mm, 12mm, 15mm, 18mm or 19mm, etc.

Preferably, the direction of bubbles at the outlet of the aeration opening of the aeration device is opposite to the rotation direction of the first rotating member and the second rotating member.

The aeration opening of the aeration device is inclined with the horizontal plane, the distance between the aeration opening and the first wire mesh or the second wire mesh and the direction of bubbles at the outlet of the aeration opening are opposite to the rotation direction of the first rotating piece and the second rotating piece, so that the regeneration effect of the first wire mesh and the second wire mesh is best, and oil absorbed in the oil removing unit can be completely removed.

Preferably, the oil scraping device comprises a scraping plate, a third conveying part and a third rotating part, wherein the scraping plate is fixed on the third conveying part, and the third rotating part is connected with the second power device to drive the third conveying part to rotate. The oil scraping device can continuously scrape oil in the cleaning fluid, and then the oil removing unit of the oil smoke waste gas pretreatment device can continuously adsorb the oil.

Preferably, the third transfer element comprises a chain.

The spraying unit and the oil removing unit are positioned in the same shell, so that the oil smoke waste gas pretreatment device is compact in structure.

Preferably, a first liquid separation plate is arranged at the bottom between the spraying unit and the oil removing unit. Because the spraying unit can generate water mist and then liquid is generated at the bottom, a liquid separation plate is arranged between the spraying unit and the oil removal unit.

Preferably, a second liquid separation plate is arranged at the bottom between the first metal filtering and degreasing module and the second metal filtering and degreasing module.

Preferably, the height of the first and second baffles is independently 1.2-1.5 times, such as 1.3 times or 1.4 times, the height of the bath liquid in the first washing tank. The heights of the first liquid separation plate and the second liquid separation plate are the best in the range.

Preferably, a partition plate is arranged between the top of the first metal filtering and oil removing module and the shell, the movement tangential angle range of the partition plate and the first metal filtering and oil removing module is 0-45 degrees, such as 2 degrees, 5 degrees, 8 degrees, 10 degrees, 15 degrees, 18 degrees, 20 degrees, 25 degrees, 28 degrees, 30 degrees, 35 degrees, 38 degrees or 42 degrees, and the like, and the partition plate can prevent oil fume and exhaust gas from directly flowing between the top of the first metal filtering and oil removing module and the shell without removing oil.

Preferably, a partition plate is arranged between the top of the second metal filtering and oil removing module and the shell, the movement tangential angle range of the partition plate and the second metal filtering and oil removing module is 0-45 degrees, such as 2 degrees, 5 degrees, 8 degrees, 10 degrees, 15 degrees, 18 degrees, 20 degrees, 25 degrees, 28 degrees, 30 degrees, 35 degrees, 38 degrees or 42 degrees, and the like, and the partition plate can prevent oil fume and exhaust gas from directly flowing between the top of the first metal filtering and oil removing module and the shell without removing oil.

Preferably, an oil drain is arranged on the shell, and oil scraped by the oil scraping plate can be drained from the oil drain.

It is a second object of the present invention to provide a method for pretreatment of soot exhaust gas using the system as described above, the method comprising the steps of:

(1) Spraying the oil smoke waste gas to be treated;

(2) Adsorbing oil in the lampblack exhaust gas obtained in the step (1) by adopting a moving first wire mesh;

(3) Absorbing oil in the oil smoke waste gas obtained in the step (2) by adopting a moving second wire mesh, obtaining purified flue gas;

(4) The first wire mesh and the second wire mesh are cleaned, and regenerated first wire mesh and regenerated second wire mesh are obtained and used in the step (2) and the step (3), respectively.

According to the pretreatment method of the oil smoke waste gas, the oil smoke waste gas is pretreated, the liquid-solid contact capacity of the waste gas is increased, a small part of oil content in the oil smoke waste gas is removed, and then the pretreated oil smoke waste gas is dynamically adsorbed to remove most of the oil content in the oil smoke waste gas; the material having the oil adsorbed thereon is regenerated and reused for adsorption of the oil. The oil removing efficiency of the oil smoke waste gas pretreatment method is greatly improved by combining spray pretreatment and dynamic oil removing.

The pretreatment method of the oil smoke waste gas can continuously treat the oil smoke waste gas, has low water consumption, small waste water amount, low requirements on components of the waste gas and large treatment gas amount, can realize online regeneration continuous operation, does not need manual cleaning work, and is particularly suitable for waste gas containing oil components with different concentrations and dust-containing waste gas.

The spraying amount of the spraying treatment in the step (1) is 1.2-10 times, such as 1.5 times, 1.8 times, 2.0 times, 2.8 times, 3.5 times, 4.5 times, 5.8 times, 6.7 times, 7.5 times, 8.2 times or 9.3 times, and the like, of the oil content in the oil smoke waste gas. The effect of the spray pretreatment is best in this spray amount range.

Preferably, the spraying direction of the spraying treatment in the step (1) is the same as the flow direction of the oil smoke waste gas.

The movement speed of the first wire mesh in the step (2) is 1.0-1.3 times, preferably 1.1 times of the aeration speed. The movement speed of the first wire mesh is matched with the aeration speed, the oil removing capability is best in the range, and the cleaning effect is best.

Preferably, the moving direction of the first wire mesh in the step (2) is perpendicular to the flow direction of the oil smoke waste gas to be treated.

Preferably, the movement speed of the second wire mesh in step (3) is 1.4-1.6 times, preferably 1.5 times the aeration speed. The movement speed of the second wire mesh is matched with the aeration speed, the oil removing capability is best in the range, and the cleaning effect is best.

Preferably, the moving direction of the second wire mesh in the step (3) is perpendicular to the flow direction of the oil smoke waste gas to be treated.

Preferably, the cleaning agent used for cleaning the first wire mesh and the second wire mesh in the step (4) is selected from a mixed solution of water and an oleophilic agent, wherein the oleophilic agent is selected from any one or a combination of at least two of polyacrylamide, alkyl naphthalene sulfonate sodium salt, triethanolamine oleate soap, triethanolamine monooleate or octadecyl amine acetate, and typical but non-limiting oleophilic agent combination is such as polyacrylamide and alkyl naphthalene sulfonate sodium salt, triethanolamine oleate soap and triethanolamine monooleate, octadecyl amine acetate, polyacrylamide and alkyl naphthalene sulfonate sodium salt.

Preferably, the water content in the cleaning agent is 1-100% by mass, such as 3%, 8%, 10%, 13%, 18%, 25%, 29%, 35%, 45%, 56%, 58%, 68%, 75%, 86% or 95% by mass, etc.

As an preferable technical scheme, the pretreatment method of the oil smoke exhaust gas comprises the following steps:

(1) Spraying the oil smoke waste gas to be treated, wherein the spraying quantity is 1.2-10 times of the oil content in the oil smoke waste gas, and the spraying direction is the same as the flow direction of the oil smoke waste gas;

(2) Adsorbing oil content in the oil smoke waste gas obtained in the step (1) by adopting a moving first wire mesh, wherein the moving speed of the first wire mesh is 1.0-1.3 times of the aeration speed, and the moving direction is vertical to the flow direction of the oil smoke waste gas to be treated;

(3) Absorbing oil content in the oil smoke waste gas obtained in the step (2) by adopting a moving second wire mesh to obtain purified smoke, the movement speed of the second wire mesh is 1.4-1.6 times of the aeration speed, and the movement direction is vertical to the flow direction of the oil smoke waste gas to be treated;

(4) And (3) in an aeration state, cleaning the first wire mesh and the second wire mesh by adopting a cleaning solution to obtain regenerated first wire mesh and regenerated second wire mesh which are respectively used in the step (2) and the step (3), wherein the mass percentage of water in the cleaning solution is 1-100%.

The numerical ranges recited herein include not only the above-listed point values, but also any point values between the above-listed numerical ranges that are not listed, and are limited in space and for the sake of brevity, the present invention is not intended to be exhaustive of the specific point values that the stated ranges include.

Compared with the prior art, the invention has the beneficial effects that:

the pretreatment system and the pretreatment method for the oil smoke waste gas can treat the oil smoke waste gas efficiently and continuously, the water consumption is low, the waste water quantity is small, and the oil removal rate can reach more than 90 percent, for example, 5000m of treatment ³ Oily waste gas (oil concentration 2 g/m) ³ ) The oil removal efficiency is more than 93%, the water consumption and the wastewater amount are about 0.5L/h, and the online regeneration continuous operation can be realized without manual cleaning work;

the oil smoke pretreatment system and the method provided by the invention have low requirements on the components of the waste gas, and the flow rate of the treated oil smoke waste gas can reach 10000m when the treatment gas quantity is large ³ And/h, the oil content in the lampblack waste gas can be 0.1-5g/m ³ ；

The system and the method for preprocessing the oil smoke waste gas are particularly suitable for waste gas with different concentrations of oil-containing components and dust-containing waste gas, and the oil content range can be 0.1-5g/m ³ The dust content can be 0-0.5g/m ³ 。

Drawings

Fig. 1 is a side view of the soot exhaust gas pretreatment system provided in example 1.

Fig. 2 is a front view of the soot exhaust gas pretreatment system provided in embodiment 1, wherein the first wire mesh and the second wire mesh are not shown.

Fig. 3 is a schematic diagram showing the connection of the first wire mesh to the power unit according to embodiment 1.

Fig. 4 is a schematic view of a movement tangential angle of the partition plate and the first metal filtering and degreasing module provided in embodiment 1.

Wherein: 1. an inlet flange; 2. an atomizing nozzle; 3. a housing; 4. a partition plate; 5. a first metal filtering and degreasing module; 6. a second metal filtering and degreasing module; 7. reducing; 8. an outlet flange; 9. a motor fixing support; 10. a motor; 11. a third liquid-barrier plate; 12. an aeration port; 13. an air line; 14. a blower; 15. a liquid inlet pipe; 16. a lipophilic agent charging port; 17. a water inlet pipe; 18. a water pump; 19. a motor protection cover; 20. a drive motor; 21. a bearing gear; 22. a rolling bearing gear; 23. a liquid inlet electromagnetic valve; 24. a scraper; 25. a chain belt; 26. a liquid outlet electromagnetic valve; 27. an outlet tube; 28. a first wire mesh; 29. stainless steel wire mesh support material; 30. stainless steel chain.

Arrows in the figure indicate the direction of gas flow.

Detailed Description

The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.

Example 1

The oil smoke waste gas pretreatment system comprises a spraying unit and an oil removal unit which are sequentially arranged along the flow direction of oil smoke waste gas to be treated, wherein the side view and the front view of the oil smoke waste gas pretreatment system are respectively shown in fig. 1 and 2; further comprises: a power unit and a regeneration unit;

the spraying unit is used for spraying oil smoke waste gas to be treated and comprises an atomization spraying device, wherein the atomization spraying device comprises an atomization spray head 2 and a water inlet pipe 17, the water inlet pipe 17 is connected with a water pump 18, and the atomization spray head 2 is connected with the water inlet pipe 17;

the oil removing unit comprises a first metal filtering oil removing module 5 and a second metal filtering oil removing module 6 which are sequentially arranged along the flowing direction of the waste gas to be treated, wherein the first metal filtering oil removing module 5 comprises a first metal wire mesh 28; the second metal filtering and degreasing module 6 comprises a second metal wire mesh; the first wire mesh 28 has an average pore size of 0.1-10mm; the average pore diameter of the second wire mesh is 0.2-0.6 times that of the first wire mesh 28; the first wire mesh 28 and the second wire mesh are independently made of wires having a diameter of 0.1-1.0 mm; the metal wire is selected from any one or a combination of at least two of copper wires, aluminum alloy wires, aluminum wires, stainless steel 304 wires or stainless steel 316 wires;

The power unit comprises a first power device, a first rotating member and a second rotating member which are respectively connected with the first power device, a first conveying member matched with the first rotating member and a second conveying member matched with the second rotating member, the first wire mesh 28 is fixed on the first conveying member, and the second wire mesh is fixed on the second conveying member; the first rotating member drives the first wire mesh 28 to rotate, and the second rotating member drives the second wire mesh to rotate; a first support is also provided between the first wire mesh 28 and the first transfer member, the thickness of the first support being 2-10 times the average pore size of the first wire mesh 28; a second supporting piece is arranged between the second wire mesh and the second conveying piece, and the thickness of the second supporting piece is 2-10 times of the average pore diameter of the second wire mesh; the first power device is a transmission motor 20, and a motor protection cover 19 is arranged outside the transmission motor 20; the first and second rotating members each comprise a bearing gear 21 and a rolling bearing gear 22 coupled thereto; the first support and the second support are both stainless steel mesh support material 29; the first and second transfer members are stainless steel chains 30, and the connection of the power unit to the first wire mesh 28 is schematically shown in fig. 3: the first wire mesh 28, the stainless steel mesh support material 29 and the stainless steel links 30 are fixed as a whole;

The regeneration unit comprises a first cleaning tank, a second cleaning tank, a cleaning liquid supply device, an aeration device, an oil scraping device and a second power device, wherein the first cleaning tank is positioned at the lower part of the first oil removal module, the second cleaning tank is positioned at the lower part of the second oil removal module, the first cleaning tank and the second cleaning tank are both provided with a part of structures of the aeration device and a part of structures of the oil scraping device, and the aeration device and the oil scraping device are both connected with the second power device; the second power device comprises a motor 10, and the motor 10 is fixed by a motor fixing support 9; the aeration device comprises a fan 14 and an air pipeline 13, is of a main pipe-branch pipe aeration structure, and is provided with aeration ports 12, wherein the distance between the aeration ports 12 is 0.1-1 time of the length of the main pipe; the inclination angle between the aeration opening 12 of the aeration device and the horizontal plane is 10 degrees to 45 degrees; the distance between the aeration opening 12 of the aeration device and the first wire mesh or the second wire mesh is 5-20mm, and the direction of air bubbles at the outlet of the aeration opening 12 is opposite to the rotation direction of the first rotating member and the second rotating member; the cleaning liquid supply device comprises an oleophilic agent supply hopper, a water supply device and a water inlet pipe 15 connected with the water supply device, wherein a liquid inlet electromagnetic valve 23 is arranged on the water inlet pipe 15, the water supply device comprises a water pump 18, the water inlet pipe 15 is respectively arranged in the first cleaning tank and the second cleaning tank, the cleaning liquid supply device is connected with the liquid inlet pipe 15, and the installation height of the liquid inlet pipe 15 is 1/2-3/4 of the height of an oil drain port; the oil scraping device comprises a scraping plate 24, a third conveying member and a third rotating member, wherein the scraping plate 24 is fixed on the third conveying member, the third rotating member is connected with the second power device and drives the third conveying member to rotate, and the third conveying member is a chain belt 25;

The spraying unit and the oil removing unit are positioned in the same shell 3, an air inlet is formed in one side of the shell 3, an air outlet is formed in the other side of the shell 3, an inlet flange 1 is arranged on the air inlet, an outlet flange 8 is arranged on the air outlet, and a first liquid separation plate is arranged at the bottom between the spraying unit and the oil removing unit; a second liquid separation plate is arranged at the bottom between the first metal filtering and oil removing module 5 and the second metal filtering and oil removing module 6; a third liquid separation plate 11 is arranged at the bottom between the second metal filtering and degreasing module and the shell, and the heights of the first liquid separation plate, the second liquid separation plate and the third liquid separation plate 11 are independently 1.2-1.5 times of the height of the bath liquid in the first cleaning tank; a partition board 4 is arranged between the top of the first metal filtering and oil removing module 5 and the shell 3, and the movement tangential angle alpha of the partition board 4 and the first metal filtering and oil removing module 5 ranges from 0 to 45 degrees, as shown in figure 4; a partition board 4 is arranged between the top of the second metal filtering and oil removing module 6 and the shell 3, and the movement tangential angle range of the partition board 4 and the second metal filtering and oil removing module 6 is 0-45 degrees; an oil drain port is further formed in the shell 3 and is connected with an outlet pipe 27, a liquid outlet electromagnetic valve 26 is arranged on the outlet pipe 27, the scraping plate 24 is in contact with the liquid level, oil on the surface of the cleaning liquid is scraped off, and the oil is scraped to the outlet pipe 27; the drive motor 20 is arranged outside the housing 3.

The method for preprocessing the lampblack waste gas by using the system comprises the following steps:

(1) Spraying the oil smoke waste gas to be treated;

(3) Adsorbing oil content in the oil smoke waste gas obtained in the step (2) by adopting a moving second wire mesh to obtain purified smoke;

The more preferable pretreatment method of the lampblack exhaust gas comprises the following steps:

(3) Adsorbing oil in the oil smoke waste gas obtained in the step (2) by adopting a moving second wire mesh to obtain purified smoke, wherein the moving speed of the second wire mesh is 1.4-1.6 times of the aeration speed, and the moving direction is vertical to the flow direction of the oil smoke waste gas to be treated;

In the above embodiment 1, the spraying unit and the degreasing unit of the oil smoke exhaust gas pretreatment system may be further disposed in different housings, and the first degreasing module and the second degreasing module in the degreasing unit may be disposed in different housings, where no liquid separation plate is required to be disposed; the water inlet pipe 17 of the spraying unit and the liquid inlet pipe 15 of the regeneration unit can be connected with the same water pump to simplify the pipeline connection, can be connected with different water supply devices, and can be directly connected with the first cleaning tank and the second cleaning tank, but preferably, the lipophilic agent liquid inlet 16 is mixed with water and then enters the first cleaning tank and the second cleaning tank.

Example 2

The oil smoke waste gas pretreatment system comprises a spraying unit and an oil removal unit which are sequentially arranged along the flowing direction of the oil smoke waste gas to be treated; further comprises: a power unit and a regeneration unit;

the spraying unit is used for spraying the oil smoke waste gas to be treated and comprises an atomization spraying device, the atomization spraying device comprises an atomization spray head 2 and a water inlet pipe 17, the water inlet pipe 17 is connected with a water pump 18, the water outlet average aperture of the atomization spray head 2 is 0.5mm, the atomization spray head 2 is connected with the water inlet pipe 17 in a threaded fastening mode, and the atomization spray heads 2 are arranged in a linear mode;

The oil removing unit comprises a first metal filtering oil removing module 5 and a second metal filtering oil removing module 6 which are sequentially arranged along the flowing direction of the waste gas to be treated, wherein the first metal filtering oil removing module 5 comprises a first metal wire mesh 28; the second metal filtering and degreasing module 6 comprises a second metal wire mesh; the average pore size of the first wire mesh 28 is 0.2mm; the average pore size of the second wire mesh is 0.6 times the average pore size of the first wire mesh 28; the first wire mesh 28 and the second wire mesh are independently made of wires having a diameter of 0.1 mm; the metal wire is selected from any one or a combination of at least two of copper wires, aluminum alloy wires, aluminum wires, stainless steel 304 wires or stainless steel 316 wires;

the power unit comprises a first power device, a first rotating member and a second rotating member which are respectively connected with the first power device, a first conveying member matched with the first rotating member and a second conveying member matched with the second rotating member, the first wire mesh 28 is fixed on the first conveying member, and the second wire mesh is fixed on the second conveying member; the first rotating member drives the first wire mesh 28 to rotate, and the second rotating member drives the second wire mesh to rotate; a first support is also provided between the first wire 28 and the first transfer element; a second supporting piece is arranged between the second wire mesh and the second conveying piece, and the thickness of the second supporting piece is 2 times of the average pore diameter of the second wire mesh; the first power device is a transmission motor 20, and a motor protection cover 19 is arranged outside the transmission motor 20; the first and second rotating members each comprise a bearing gear 21 and a rolling bearing gear 22 coupled thereto; the first support and the second support are both stainless steel mesh support material 29; the first and second conveying members are stainless steel chains 30 (304), and the connection between the power unit and the first wire mesh 28 is schematically shown in fig. 3: the first wire mesh 28 is fixed on a stainless steel wire mesh supporting material 29 with an average pore diameter of 0.5mm, and the first wire mesh 28 and the second wire mesh are fixed on stainless steel chains 30, wherein stainless steel 304 wires with the diameter of 0.5mm are adopted for fixation;

The regeneration unit comprises a first cleaning tank, a second cleaning tank, a cleaning liquid supply device, an aeration device, an oil scraping device and a second power device, wherein the first cleaning tank is positioned at the lower part of the first oil removal module, the second cleaning tank is positioned at the lower part of the second oil removal module, the first cleaning tank and the second cleaning tank are both provided with a part of structures of the aeration device and a part of structures of the oil scraping device, and the aeration device and the oil scraping device are both connected with the second power device; the second power device comprises a motor 10, and the motor 10 is fixed by a motor fixing support 9; the aeration device comprises a fan 14 and an air pipeline 13, is of a main pipe-branch pipe aeration structure, and is provided with aeration ports 12, wherein the distance between the aeration ports 12 is 0.1 time of the length of the main pipe; the inclination angle of the aeration opening 12 of the aeration device and the horizontal plane is 45 degrees; the distance between the aeration opening 12 of the aeration device and the first wire mesh or the second wire mesh is 5mm, and the direction of air bubbles at the outlet of the aeration opening 12 is opposite to the rotation direction of the first rotating piece and the second rotating piece; the cleaning liquid supply device comprises a lipophilic agent supply hopper, a water supply device and a water inlet pipe 15 connected with the water supply device, wherein a liquid inlet electromagnetic valve 23 is arranged on the water inlet pipe 15, the water supply device comprises a water pump 18, the water inlet pipe 15 is respectively arranged in a first cleaning tank and a second cleaning tank, the cleaning liquid supply device is connected with the liquid inlet pipe 15, the installation height of the liquid inlet pipe 15 is 2/3 of the height of the cleaning liquid in the first cleaning tank or the second cleaning tank, the lipophilic agent component is polyacrylamide, and the volume mixing ratio of the lipophilic agent component and tap water is 1:100; the oil scraping device comprises a scraping plate 24, a third conveying member and a third rotating member, wherein the scraping plate 24 is fixed on the third conveying member, the third rotating member is connected with the second power device and drives the third conveying member to rotate, and the third conveying member is a chain belt 25;

The spraying unit and the oil removing unit are positioned in the same shell 3, an air inlet is formed in one side of the shell 3, an air outlet is formed in the other side of the shell 3, an inlet flange 1 is arranged on the air inlet, an outlet flange 8 is arranged on the air outlet, and a first liquid separation plate is arranged at the bottom between the spraying unit and the oil removing unit; a second liquid separation plate is arranged at the bottom between the first metal filtering and oil removing module 5 and the second metal filtering and oil removing module 6; a third liquid separation plate 11 is arranged at the bottom between the second metal filtering and degreasing module and the shell, and the heights of the first liquid separation plate, the second liquid separation plate and the third liquid separation plate 11 are 1.2 times of the height of the bath liquid in the cleaning bath; a stainless steel plate-partition plate 4 with the thickness of 3mm is arranged between the top of the first metal filtering and oil removing module 5 and the shell 3, a gap of 2mm is reserved between the partition plate 4 and the primary metal filtering and oil removing module 5 in the installation height dimension, and the movement tangential angle alpha range of the partition plate 4 and the first metal filtering and oil removing module 5 is 45 degrees, as shown in fig. 4; a baffle plate 4 is arranged between the top of the second metal filtering and oil removing module 6 and the shell 3, and the movement tangential angle range of the baffle plate 4 and the second metal filtering and oil removing module 6 is 45 degrees; an oil drain port is further formed in the shell 3 and is connected with an outlet pipe 27, the height of the outlet pipe 27 is 1.1 times of the height of the liquid level, a liquid outlet electromagnetic valve 26 is arranged on the outlet pipe 27, and the opening frequency of the liquid outlet electromagnetic valve 26 is 3 times per hour; the drive motor 20 is arranged outside the housing 3.

Example 3

the spraying unit is used for spraying oil smoke waste gas to be treated and comprises an atomization spraying device, the atomization spraying device comprises atomization spray heads 2 and a water inlet pipe 17, the water inlet pipe 17 is connected with a water pump 18, the average water outlet aperture of the atomization spray heads 2 is 0.2mm, the atomization spray heads 2 and the water inlet pipe 17 are connected in a 90-degree PVC elbow receiving mode, the atomization spray heads 2 are distributed in a square arrangement, and the number of the atomization spray heads 2 arranged at each side is 6;

the oil removing unit comprises a first metal filtering oil removing module 5 and a second metal filtering oil removing module 6 which are sequentially arranged along the flowing direction of the waste gas to be treated, wherein the first metal filtering oil removing module 5 comprises a first metal wire mesh 28; the second metal filtering and degreasing module 6 comprises a second metal wire mesh; the average pore size of the first wire mesh 28 is 0.5mm; the average pore size of the second wire mesh is 0.2 times the average pore size of the first wire mesh 28; the first wire mesh 28 and the second wire mesh are independently made of wires having a diameter of 0.5mm; the metal wire is selected from any one or a combination of at least two of copper wires, aluminum alloy wires, aluminum wires, stainless steel 304 wires or stainless steel 316 wires;

The power unit comprises a first power device, a first rotating member and a second rotating member which are respectively connected with the first power device, a first conveying member matched with the first rotating member and a second conveying member matched with the second rotating member, the first wire mesh 28 is fixed on the first conveying member, and the second wire mesh is fixed on the second conveying member; the first rotating member drives the first wire mesh 28 to rotate, and the second rotating member drives the second wire mesh to rotate; a first support is also provided between the first wire 28 and the first transfer element; a second supporting piece is arranged between the second wire mesh and the second conveying piece; the first power device is a transmission motor 20, and a motor protection cover 19 is arranged outside the transmission motor 20; the first and second rotating members each comprise a bearing gear 21 and a rolling bearing gear 22 coupled thereto; the first support and the second support are both stainless steel mesh support material 29; the first and second conveying members are stainless steel chains 30 (316L), and the connection between the power unit and the first wire mesh 28 is schematically shown in fig. 3: the first wire mesh 28 is fixed on a stainless steel wire mesh supporting material 29 with an average pore diameter of 2.5mm, and the first wire mesh and the second wire mesh are fixed on a stainless steel chain 30, wherein stainless steel 304 wires with the diameter of 0.5mm are adopted for fixation;

The regeneration unit comprises a first cleaning tank, a second cleaning tank, a cleaning liquid supply device, an aeration device, an oil scraping device and a second power device, wherein the first cleaning tank is positioned at the lower part of the first oil removal module, the second cleaning tank is positioned at the lower part of the second oil removal module, the first cleaning tank and the second cleaning tank are both provided with a part of structures of the aeration device and a part of structures of the oil scraping device, and the aeration device and the oil scraping device are both connected with the second power device; the second power device comprises a motor 10, and the motor 10 is fixed by a motor fixing support 9; the aeration device comprises a fan 14 and an air pipeline 13, is of a main pipe-branch pipe aeration structure, and is provided with aeration ports 12, wherein the distance between the aeration ports 12 is 0.1 time of the length of the main pipe; the inclination angle of the aeration opening 12 of the aeration device and the horizontal plane is 45 degrees; the distance between the aeration opening 12 of the aeration device and the first wire mesh or the second wire mesh is 5mm, and the direction of air bubbles at the outlet of the aeration opening 12 is opposite to the rotation direction of the first rotating piece and the second rotating piece; the cleaning liquid supply device comprises an oleophilic agent supply hopper, a water supply device and a water inlet pipe 15 connected with the water supply device, wherein a liquid inlet electromagnetic valve 23 is arranged on the water inlet pipe 15, the water supply device comprises a water pump 18, the water inlet pipe 15 is respectively arranged in a first cleaning tank and a second cleaning tank, the cleaning liquid supply device is connected with the liquid inlet pipe 15, the installation height of the liquid inlet pipe 15 is 3/4 of the height of cleaning liquid in the first cleaning tank or the second cleaning tank, the oleophilic agent comprises mixed liquid of polyacrylamide and octadecylamine acetate, the ratio of the mixed liquid to tap water is 1:2, the inclination angle of an aeration port is 10 degrees, and the gap between the mixed liquid and a primary flat-plate netlike wire ball material 28 is 5mm; the oil scraping device comprises a scraping plate 24, a third conveying part and a third rotating part, wherein the scraping plate 24 is fixed on the third conveying part, the third rotating part is connected with the second power device and drives the third conveying part to rotate, the third conveying part is a chain belt 25, the scraping plate 24 is firmly connected with the chain belt 25 through a stainless steel wire twisting mode of 1mm, and the scraping plate 24 is of a T-shaped structure. The scraper 24 and the chain belt 25 are made of stainless steel 316L, and the scraper 24 and the chain belt 25 are fixed on a bearing of the transmission motor 10 and are coupled through gears;

The spraying unit and the oil removing unit are positioned in the same shell 3, an air inlet is formed in one side of the shell 3, an air outlet is formed in the other side of the shell 3, an inlet flange 1 is arranged on the air inlet, an outlet flange 8 is arranged on the air outlet, and a first liquid separation plate is arranged at the bottom between the spraying unit and the oil removing unit; a second liquid separation plate is arranged at the bottom between the first metal filtering and oil removing module 5 and the second metal filtering and oil removing module 6; a third liquid separation plate 11 is arranged at the bottom between the second metal filtering and degreasing module and the shell, and the heights of the first liquid separation plate, the second liquid separation plate and the third liquid separation plate 11 are 1.2 times of the height of the bath liquid in the cleaning bath; a stainless steel plate-a partition plate 4 with the thickness of 3mm is arranged between the top of the first metal filtering and oil removing module 5 and the shell 3, a gap of 2mm is reserved between the partition plate 4 and the first metal filtering and oil removing module 5 in the installation height dimension, the movement tangential angle alpha range of the partition plate 4 and the first metal filtering and oil removing module 5 is 0 DEG, as shown in figure 4, the partition plate 4 is fixed with the inside of the shell through a threaded nut, the partition plate is in a T-shaped structure, the installation center position of the partition plate is offset by 10mm from the vertical center position of the first metal filtering and oil removing module 5 in the left direction, and a gap of 10mm is reserved between the partition plate and the first metal filtering and oil removing module 5 in the height dimension; a partition board 4 is also arranged between the top of the second metal filtering and degreasing module 6 and the shell 3, and the arrangement form of the partition board is the same as that of the partition board of the first filtering and degreasing module; an oil drain port is further formed in the shell 3 and is connected with an outlet pipe 27, the height of the outlet pipe 27 is 1.3 times of the height of the liquid level, a liquid outlet electromagnetic valve 26 is arranged on the outlet pipe 27, and the opening frequency of the liquid outlet electromagnetic valve 26 is 6 times per hour; the drive motor 20 is arranged outside the housing 3.

Example 4

Pretreatment of the soot exhaust gas was performed by using the apparatus described in example 2, comprising the steps of:

(1) The oil smoke waste gas to be treated (temperature is 25 ℃, waste gas quantity is 5000m ³ And/h, the dust concentration is 100mg/m ³ The oil content is 500mg/m ³ ) Carrying out spray treatment, wherein the spray quantity is 1.2 times of the oil content in the oil smoke waste gas, and the spray direction is the same as the flow direction of the oil smoke waste gas;

(2) Adsorbing oil content in the oil smoke waste gas obtained in the step (1) by adopting a moving first wire mesh, wherein the moving speed of the first wire mesh is 1.1 times of the aeration speed, and the moving direction is vertical to the flow direction of the oil smoke waste gas to be treated;

(3) Adsorbing oil in the oil smoke waste gas obtained in the step (2) by adopting a moving second wire mesh to obtain purified smoke, wherein the moving speed of the second wire mesh is 1.5 times of the aeration speed, and the moving direction is vertical to the flow direction of the oil smoke waste gas to be treated;

(4) And (3) in an aeration state, cleaning the first wire mesh and the second wire mesh by adopting a cleaning solution to obtain regenerated first wire mesh and regenerated second wire mesh which are respectively used in the step (2) and the step (3), wherein the mass percentage of water in the cleaning solution is 80%.

The concentration of the treated gas dust is reduced to 10mg/m ³ The oil content is reduced to less than 10mg/m ³ The dust removal rate is 90%, the oil removal rate is more than 95%, and the water consumption and the wastewater consumption are about 0.5L/h.

Example 5

(1) The oil smoke waste gas to be treated (temperature is 30 ℃ C., waste gas quantity 10000 m) ³ And/h, the dust concentration is 0.1g/m ³ The oil content is 1.0g/m ³ ) Carrying out spray treatment, wherein the spray quantity is 8 times of the oil content in the oil smoke waste gas, and the spray direction is the same as the flow direction of the oil smoke waste gas;

(2) Adsorbing oil content in the oil smoke waste gas obtained in the step (1) by adopting a moving first wire mesh, wherein the moving speed of the first wire mesh is 1.0 time of the aeration speed, and the moving direction is vertical to the flow direction of the oil smoke waste gas to be treated;

(3) Adsorbing oil in the oil smoke waste gas obtained in the step (2) by adopting a moving second wire mesh to obtain purified smoke, wherein the moving speed of the second wire mesh is 1.6 times of the aeration speed, and the moving direction is vertical to the flow direction of the oil smoke waste gas to be treated;

(4) And (3) in an aeration state, cleaning the first wire mesh and the second wire mesh by adopting a cleaning solution to obtain regenerated first wire mesh and regenerated second wire mesh which are respectively used in the step (2) and the step (3), wherein the mass percentage of water in the cleaning solution is 50%.

The concentration of the treated gas dust is reduced to 10mg/m ³ The oil content is reduced to 5mg/m ³ The dust removal rate is 90%, and the oil removal rate is more than 90%.

Example 6

(1) The oil smoke waste gas to be treated (temperature is 15 ℃, waste gas quantity is 5000m ³ And/h, the dust concentration is 0.05g/m ³ The oil content is 2.0g/m ³ ) Carrying out spray treatment, wherein the spray quantity is 10 times of the oil content in the oil smoke waste gas, and the spray direction is the same as the flow direction of the oil smoke waste gas;

(2) Adsorbing oil content in the oil smoke waste gas obtained in the step (1) by adopting a moving first wire mesh, wherein the moving speed of the first wire mesh is 1.3 times of the aeration speed, and the moving direction is vertical to the flow direction of the oil smoke waste gas to be treated;

(3) Adsorbing oil in the oil smoke waste gas obtained in the step (2) by adopting a moving second wire mesh to obtain purified smoke, wherein the moving speed of the second wire mesh is 1.4 times of the aeration speed, and the moving direction is vertical to the flow direction of the oil smoke waste gas to be treated;

(4) And (3) in an aeration state, cleaning the first wire mesh and the second wire mesh by adopting a cleaning solution to obtain regenerated first wire mesh and regenerated second wire mesh which are respectively used in the step (2) and the step (3), wherein the mass percentage of water in the cleaning solution is 30%.

The concentration of the treated gas dust is reduced to 7mg/m ³ The oil content is reduced to less than 10mg/m ³ The dust removal rate is more than 85%, and the oil removal rate is more than 90%.

Example 7

(1) The oil smoke waste gas to be treated (temperature is 15 ℃, waste gas quantity is 5000m ³ And/h, the dust concentration is 0.5g/m ³ The oil content is 5.0g/m ³ ) Carrying out spray treatment, wherein the spray quantity is 10 times of the oil content in the oil smoke waste gas, and the spray direction is the same as the flow direction of the oil smoke waste gas;

The concentration of the treated gas dust is reduced to 10mg/m ³ The oil content is reduced to less than 10mg/m ³ The dust removal rate is more than 90%, and the oilThe fraction removal rate is more than 95 percent.

The applicant declares that the above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be apparent to those skilled in the art that any changes or substitutions that are easily conceivable within the technical scope of the present invention disclosed by the present invention fall within the scope of the present invention and the disclosure.

Claims

1. The oil smoke waste gas pretreatment system is characterized by comprising a spraying unit and an oil removal unit which are sequentially arranged along the flowing direction of oil smoke waste gas to be treated;

the spraying unit is used for spraying the oil smoke waste gas to be treated;

the lampblack waste gas pretreatment system further comprises:

The regeneration unit is used for cleaning the oil removal unit;

the regeneration unit comprises a first cleaning tank, a second cleaning tank, a cleaning liquid supply device, an aeration device, an oil scraping device and a second power device, wherein the first cleaning tank is positioned at the lower part of the first oil removal module, the second cleaning tank is positioned at the lower part of the second oil removal module, the first cleaning tank and the second cleaning tank are respectively provided with a liquid inlet pipe, an aeration port of the aeration device and a scraping plate of the oil scraping device, the liquid inlet pipes are connected with the cleaning liquid supply device, and the aeration device and the oil scraping device are connected with the second power device.

2. The soot exhaust gas pretreatment system according to claim 1, wherein said spray unit comprises an atomizing spray device.

3. The oil smoke exhaust gas pretreatment system according to claim 2, wherein the atomizing spray device comprises an atomizing nozzle and a water inlet pipe, and the atomizing nozzle is connected with the water inlet pipe in a threaded fastening manner.

4. A smoke exhaust gas pretreatment system according to claim 3, wherein said atomizer heads are arranged in a linear configuration.

5. The soot exhaust gas pretreatment system according to claim 1, wherein the average pore diameter of the first wire net is 0.1 to 10mm.

6. The soot exhaust gas pretreatment system according to claim 1, wherein the average pore diameter of the second wire net is 0.2 to 0.6 times the average pore diameter of the first wire net.

7. The soot exhaust gas pretreatment system according to claim 1, wherein the first wire net and the second wire net are independently made of wires having a diameter of 0.1 to 1.0 mm.

8. The soot exhaust gas pretreatment system according to claim 7, wherein said metal wire is selected from any one or a combination of at least two of copper wire, aluminum alloy wire, aluminum wire, stainless steel 304 wire, and stainless steel 316 wire.

9. The system of claim 1, wherein the power unit comprises a first power device, a first rotating member and a second rotating member, wherein the first rotating member and the second rotating member are respectively connected with the first power device, the first rotating member drives the first wire mesh to rotate, and the second rotating member drives the second wire mesh to rotate.

10. The soot exhaust gas pretreatment system of claim 9, wherein said first power means comprises a motor;

11. the soot exhaust pretreatment system of claim 9, wherein said first rotating member and said second rotating member independently comprise gears.

12. The soot exhaust pretreatment system of claim 9, wherein the power unit further comprises a first transfer member engaged with the first rotary member, and a second transfer member engaged with the second rotary member, the first wire mesh being fixed to the first transfer member, the second wire mesh being fixed to the second transfer member.

13. The soot exhaust gas pretreatment system according to claim 12, wherein a first support member is further provided between the first wire net and the first transfer member, and the thickness of the first support member is 2 to 10 times the average pore diameter of the first wire net;

14. the soot exhaust gas pretreatment system according to claim 13, wherein a second support member is further provided between the second wire net and the second transfer member, and the thickness of the second support member is 2 to 10 times the average pore diameter of the second wire net.

15. The soot exhaust pretreatment system of claim 14, wherein said first and second supports independently comprise stainless steel mesh.

16. The soot exhaust pretreatment system of claim 12, wherein the first and second conveying members independently comprise chains.

17. The soot exhaust pretreatment system of claim 1, wherein said second power means comprises an electric motor.

18. The pretreatment system of oil fume and waste gas according to claim 1, wherein the installation height of the liquid inlet pipe is 1/2-3/4 of the height of the oil drain port.

19. The soot exhaust gas pretreatment system according to claim 1, wherein said aeration device is a manifold-branched aeration structure.

20. The pretreatment system for oil smoke exhaust gas according to claim 1, wherein the aeration gap of the aeration device is 0.1-1 times of the total pipe length.

21. The soot exhaust gas pretreatment system according to claim 1, wherein the aeration port of the aeration device is inclined at an angle of 10 ° to 45 ° with respect to the horizontal plane.

22. The soot exhaust gas pretreatment system according to claim 1, wherein the distance between the aeration opening of the aeration device and the first wire mesh or the second wire mesh is 5 to 20mm.

23. The soot exhaust gas pretreatment system according to claim 9, wherein the aeration port outlet air bubble direction of the aeration device is opposite to the rotation direction of the first rotation member and the second rotation member;

24. The pretreatment system of oil smoke exhaust gas according to claim 1, wherein the oil scraping device comprises a scraping plate, a third conveying member and a third rotating member, the scraping plate is fixed on the third conveying member, and the third rotating member is connected with the second power device to drive the third conveying member to rotate.

25. The soot exhaust pretreatment system of claim 24, wherein said third conveyor comprises a chain.

26. The soot exhaust gas pretreatment system according to claim 1, wherein the spraying unit and the degreasing unit are located in the same housing.

27. The oil smoke exhaust gas pretreatment system of claim 1 wherein a first liquid barrier is provided at the bottom between the spray unit and the oil removal unit.

28. The oil soot exhaust pretreatment system of claim 27, wherein a second liquid barrier is disposed at the bottom between the first metal filtering and degreasing module and the second metal filtering and degreasing module.

29. The soot exhaust gas pretreatment system of claim 28, wherein the height of the first and second liquid-separating plates is independently 1.2 to 1.5 times the height of the bath liquid in the first cleaning bath.

30. The soot exhaust gas pretreatment system of claim 26, wherein a partition plate is disposed between the top of the first metal filtering and degreasing module and the housing, and wherein a tangential angle of movement of the partition plate and the first metal filtering and degreasing module ranges from 0 ° to 45 °.

31. The soot exhaust gas pretreatment system of claim 26, wherein a partition plate is disposed between the top of the second metal filtering and degreasing module and the housing, and wherein a tangential angle of movement of the partition plate and the second metal filtering and degreasing module ranges from 0 ° to 45 °.

32. The soot exhaust gas pretreatment system according to claim 26, wherein an oil drain is provided on the housing.

33. A method for pretreatment of soot exhaust gas of a soot exhaust gas pretreatment system according to one of claims 1 to 32, comprising the steps of:

(1) Spraying the oil smoke waste gas to be treated;

34. The method of pretreatment of flue gas according to claim 33, wherein the spray amount of said spray treatment in step (1) is 1.2 to 10 times the oil content in said flue gas.

35. The soot exhaust gas pretreatment system according to claim 33, wherein the spraying direction of the spraying treatment of step (1) is the same as the flow direction of the soot exhaust gas.

36. The soot exhaust gas pretreatment method according to claim 33, wherein the movement speed of the first wire net in the step (2) is 1.0 to 1.3 times the aeration speed.

37. The soot exhaust gas pretreatment system of claim 33, wherein the movement speed of said first wire net of step (2) is 1.1 times the aeration speed.

38. The soot exhaust gas pretreatment system of claim 33, wherein the movement direction of said first wire net of step (2) is perpendicular to the flow direction of the soot exhaust gas to be treated.

39. The soot exhaust gas pretreatment system according to claim 33, wherein the movement speed of the second wire net of step (3) is 1.4 to 1.6 times the aeration speed.

40. The soot exhaust gas pretreatment system according to claim 33, wherein the movement speed of the second wire net of step (3) is 1.5 times the aeration speed.

41. The soot exhaust gas pretreatment system according to claim 33, wherein the movement direction of the second wire net of step (3) is perpendicular to the flow direction of the soot exhaust gas to be treated.

42. The soot exhaust gas pretreatment system according to claim 33, wherein the cleaning agent used for cleaning the first wire net and the second wire net in the step (4) is selected from a mixed solution of water and an oleophilic agent selected from any one or a combination of at least two of polyacrylamide, alkyl naphthalene sulfonate sodium salt, triethanolamine oleate soap, triethanolamine monooleate or octadecylamine acetate.

43. The soot exhaust gas pretreatment system of claim 42, wherein the water in the cleaning agent is 1 to 100% by mass.

44. The soot exhaust gas pretreatment method according to claim 33, comprising the steps of: