CN110237691A - Two phase flow semidry method deacidifying flue gas device - Google Patents
Two phase flow semidry method deacidifying flue gas device Download PDFInfo
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- CN110237691A CN110237691A CN201910585210.4A CN201910585210A CN110237691A CN 110237691 A CN110237691 A CN 110237691A CN 201910585210 A CN201910585210 A CN 201910585210A CN 110237691 A CN110237691 A CN 110237691A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/346—Controlling the process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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Abstract
Two phase flow semidry method deacidifying flue gas device provided by the invention, including reaction tower, the spray gun unit being set in the reaction tower, compressed gas supply unit, neutralizer supply unit and control unit；The spray gun unit is internally provided with for carrying out atomization ejection to the neutralizer entered in spray gun unit and to the multistage atomizing structure of the deacidifying flue gas in reaction tower；Liquid neutralizer can be formed the molecule that average grain diameter is 30 μm to 100 μm by repeatedly atomization by the particular spray gun by can be realized multistage atomizing, greatly increase the specific surface area of neutralizer, considerably increase the catalytic chance of pollutant in neutralizer and flue gas, achieve the purpose that remove acid contaminant in flue gas, simultaneously, the neutralizer and water mist of liquid are melted into small particle, conducive to the reduction of flue-gas temperature and the dry type operation of reaction tower, do not generate waste water, without frequently clearing up, investment and operating cost are greatly reduced.
Description
Technical field
The present invention relates to pollution process field more particularly to a kind of two phase flow semidry method deacidifying flue gas devices.
Background technique
With the development of science and technology human society is developed rapidly, but since people are to industrial negative
It influences to expect that not enough it is unfavorable to prevent, results in the big crisis of global three: shortage of resources, environmental pollution and ecological disruption, environment
Pollution is that the composition of environment or state is made to change due to human factor, certain substance is added into environment and is more than environment
Self-purification capacity, Environmental Quality decline, to upset and destroy showing for the ecosystem and the normal working and living condition of the mankind
As the flue gas that the industries such as waste incineration, coal-burning boiler, metallurgy, chemical industry, building materials generate contains SOx、NOx, HCl, granule dust, again
The secondary pollutions such as metal and dioxin, do great harm to the environment and seriously affect the daily life of the common people around and the person is strong
Health.Currently, removing sour gas using dry method, wet process or semidry method to low concentration gas containing acid fume；Utilize electrostatic precipitator or cloth
Bag dust collector can remove the dust in flue gas；In addition, the toxic component in flue gas can also be by spraying into activated carbon adsorption etc.
Method removal.Control to toxic and harmful gas discharge, causes incineration treatment of garbage operating cost and technical requirements quite high.By
Lower in dry cleaning flow path efficiency, supplies consumption is higher, individually fewer and fewer using the engineering of dry method process depickling；Wet process stream
Journey is high-efficient, and supplies consumption is low, but due to needing to handle the waste water of generation, and processing cost is higher, at present at home
Only used in economically developed minority area；Semidry process is because its deacidification efficiency is high, supplies consumption is few and does not generate waste water
The advantages that and be widely used.
The core technology of existing semidry process is rotary sprayer, and (8000r/min is extremely by high speed rotation for the equipment
So that the milk of lime of liquid is atomized into the dry-running that small particle guarantees extracting tower, the equipment at present by than
Western Gus (lucky precious by Singapore at present) monopolization when sharp, about 450,000 to 500,000 dollars of price.Meanwhile there is operation 7 days in the equipment
It must once be cleared up when to 10 days, otherwise, dynamically balanced disadvantage will be lost, therefore, need a kind of new semidry method flue gas
Deacidifying device can reduce investment and operating cost while improving efficiency.
Based on problem above, the present invention provides a kind of two phase flow semidry method deacidifying flue gas device, will in specific spray gun
Neutralizer forms the molecule that average grain diameter is 30 μm to 100 μm by repeatedly atomization, greatly increases the ratio of neutralizer
Surface area considerably increases the catalytic chance of pollutant in neutralizer and flue gas, reaches acid pollution in removal flue gas
The purpose of object, while being conducive to the reduction of flue-gas temperature and the dry type operation of reaction tower, waste water is not generated, without frequently clearing up,
Greatly reduce investment and operating cost.
Summary of the invention
In view of this, two phase flow semidry method deacidifying flue gas device provided by the invention, by neutralizer in specific spray gun
The molecule that average grain diameter is 30 μm to 100 μm is formed by being repeatedly atomized, greatly increases the specific surface area of neutralizer,
The catalytic chance of pollutant in neutralizer and flue gas is considerably increased, the mesh of acid contaminant in removal flue gas is reached
, while being conducive to the reduction of flue-gas temperature and the dry type operation of reaction tower, waste water is not generated, without frequently cleaning, is dropped significantly
Low investment and operating cost.
Two phase flow semidry method deacidifying flue gas device provided by the invention, including reaction tower, is set in the reaction tower
Spray gun unit, compressed gas supply unit, neutralizer supply unit and control unit；The spray gun unit, which is internally provided with, to be used for
Atomization ejection is carried out to the liquid neutralizer entered in spray gun unit and to the multistage atomizing structure of the deacidifying flue gas in reaction tower；
The spray gun unit is the column with sealing structure, and the setting of multistage atomizing structure is in the spray gun unit conducive to liquid neutralization
Agent forms molecule by repeatedly atomization, increases the specific surface area of liquid neutralizer, increases in liquid neutralizer and flue gas
The catalytic chance of pollutant, to achieve the purpose that remove acid contaminant in flue gas；Into the compression before spray gun unit
The pressure of gas is general constant in 0.35MPa to 0.45MPa, and a higher flow velocity can be provided for compressed gas, makes to compress
High speed atomisation of the gas as medium belt hydrodynamic state neutralizer in spray gun unit；The neutralizer supply unit is provided in liquid
And agent；The compressed gas is preferably compressed air；The spray gun unit is the fixation for neutralizer to be sprayed to atomizing particle
Formula spray gun, preferably spray gun unit are fixedly installed in the near center location in reaction tower；The material selection of reaction tower belongs to existing
Technology such as uses closed steel shell, and details are not described herein.
Further, the multistage atomizing structure further includes being set at the top of spray gun unit for the liquid for entering spray gun unit
The Venturi tube structure of state neutralizer progress level-one atomization；The setting of the Venturi tube structure makes compressed gas and liquid neutralizer
Gas-liquid mixture high speed has a pressure drop after passing through Venturi tube structure, conducive to the atomization and acceleration of gas-liquid mixture；The text
Structure includes setting gradually as the back taper contraction section of entrance, intermediate venturi and as the taper diffuser of outlet in mound；
The back taper contraction section includes contraction section and spray gun unit top on venturi (under compressed gas and liquid neutralizer entrance)
Back taper cavity section；It is preferred that the Venturi tube structure is located at the top of spray gun unit and the internal partial wall of the Venturi tube structure
The conformal gluing, sealing of the outer wall (side wall) of (side wall) and the spray gun unit is arranged, and as using being wholely set, details are not described herein；
The back taper contraction section, venturi and taper diffuser are set near the medium position of Venturi tube structure；Middle part herein is
Refer to the axial location of Venturi tube structure or column spray gun unit；The cone angle of the back taper contraction section is 50 ° -60 °, preferred cone angle
It is 60 °；The cone angle of the taper diffuser is 135 ° -145 °, and preferred cone angle is 140 °；It is spread in back taper contraction section and taper
Under the optimum taper angle of section, more conducively to the atomization of gas-liquid mixture and acceleration；The atomizing principles of the Venturi tube structure belong to existing
There is technology, details are not described herein；The cone angle was that the vertex of a cone of pyramidal structure and the section in the cone bottom center of circle are intersected with pyramidal structure
Two tapers between angle, belong to the prior art, details are not described herein；
Further, the taper diffuser axial length, the axial length of venturi and the axial length of back taper contraction section
The ratio between be 1:1:8-1:1:12, preferably 1:1:10；Under the optimum ratio, be further conducive to the atomization of gas-liquid mixture and
Accelerate；The ratio between the bottom cavity cross-sectional area that the cross-sectional area of the venturi and the spray gun unit bottom are formed is 1:8-1:
10, preferably 1:9；Conducive to the flow of gas-liquid mixture is adjusted according to demand, while being conducive to adjust gas-liquid mixture
Atomizing effect and raising accelerating velocity；
Further, the multistage atomizing structure further includes being set to spray gun unit bottom and exporting with taper diffuser opposite
And spaced boss target nail；The boss target screw top portion is provided with to be put down for further hitting against atomization to gas-liquid mixture
Face or globoidal structure；The boss target nail is set to the bottom of spray gun unit and forms collision towards the inside of spray gun unit protrusion
The cylinder or column construction of atomization, the boss target nail can be planar structure, can also be globoidal structure, the boss target nail
The taper diffuser of top and Venturi tube structure is spaced in intervals, conducive to the gas-liquid mixture of compressed gas and liquid neutralizer
The atomization to gas-liquid mixture is formed after rushing at atomization platform with high speed；The boss target nail is located at the bottom of spray gun unit
Portion, for carrying out second level atomization to neutralizer；It is preferred that the atomization platform of boss target nail is set to the bottom of the spray gun unit
Center and just opposite along axial direction with the cavity of Venturi tube structure；
Further, the cross section for the bottom cavity that the apex area of the boss target nail and the spray gun unit bottom are formed
The ratio between product (the maximum cross-section area) is 1:1.8-1:2.5, preferably 1:2；Under the optimum ratio, more conducively pass through venturi knot
The gas-liquid mixture of structure atomization abundant is collided to what boss target follow closely in favor of being further atomized；The boss target nail is along axial length
Degree is 1:1-1:3, preferably 1:2 along axial length ratio with the bottom cavity；Under the optimum ratio, more conducively pass through
The acceleration of the gas-liquid mixture of Venturi tube structure atomization and the collision atomization that further boss target is followed closely conducive to gas-liquid mixture；
Further, the bottom cavity that the spray gun unit bottom is formed is inverted cone-shaped structure, the inverted cone-shaped structure and
Cone angle is 144 ° -156, and preferred cone angle is 150 °；Under the optimum taper angle, the gas-liquid more conducively by Venturi tube structure atomization is mixed
Object is closed in the further mixing and smooth discharge after the further atomization that boss target is followed closely；The tapered edges of the inverted cone-shaped structure
For the spray gun unit bottom edge around boss target nail, bottom axis of the bottom edge close to the opposite spray gun unit of side-walls of spray gun unit
Inclined ramp is formed slopely at the heart upwards；
Further, multiple lance outlets are provided in the tapered slope of the inverted cone-shaped structure；The multiple lance outlet
Diameter be 1mm-2mm, preferably 1mm；The tapered slope has the tapered edges to pyramidal structure of tilt angle, namely
The bottom edge of the spray gun unit with tilt angle；The quantity of the multiple lance outlet is arranged according to actual needs,
The lance outlet as described in being provided with 4-6；It is conducive to pass through by the lesser multiple lance outlets of biggish bottom cavity entrance aperture
The gas-liquid mixture that is atomized twice generates biggish pressure drop, conducive to gas-liquid mixture further atomization (third level atomization) and
Discharge；
Further, compressed gas entrance, the outside setting of the compressed gas entrance are provided at the top of the spray gun unit
There are multiple neutralizer entrances；The compressed gas entrance is set near the centre at the top of spray gun unit, multiple neutralizers
Entrance is circumferentially arranged at the surrounding of compressed gas entrance；The cross-sectional area and all neutralizers of the compressed gas entrance
The ratio between cross-sectional area of entrance is 1:1-1:1.5, preferably 1:1.2；Conducive to suitable liquid neutralizer and have certain pressure
Compressed gas intake；The quantity of the neutralizer entrance is arranged according to actual needs, as described in being provided with 2-4 in
With agent entrance；
Further, the tower body sidewall bottom of the reaction tower is provided with smoke inlet, enters the smoke inlet for making
Flue gas uplink and with spray gun unit spray atomization neutralizer purification is contacted in reaction tower, enter smoke inlet conducive to flue gas
Uplink and by, with bigger contact surface area haptoreaction, being conducive to be atomized neutralization between the lower atomization neutralizer of spray gun unit injection afterwards
Agent is more uniform to the neutralization reaction of flue gas；The flue gas is acidic flue gas；Net gas outlet is set to the tower top of the reaction tower
It for excluding purified flue gas, is quickly discharged out of reaction tower conducive to the flue gas after neutralization, improves treatment effeciency；After neutralization
Flue gas by net gas outlet enter subsequent processing facility；Flying dust outlet is set to the tower bottom of the reaction tower for purification to be discharged
When the flying dust that generates；The sedimentation and exclusion of the flying dust generated when conducive to purification, conducive to the frequency to reaction tower and spray gun unit is avoided
Numerous cleaning；
Further, the neutralizer supply unit and the input terminal of control unit connect, the compressed gas supply unit
It is connect with the input terminal of control unit, the output end of described control unit and the input terminal of spray gun unit connect；
It is prepared by neutralizer supply unit and the alkali liquid neutralizer after preparation is sent to spray gun unit, pass through tune
Neutralizer intake parameter is saved neutralizer is added and carries out multistage atomizing processing to neutralizer by spray gun unit；Neutralization after atomization
Agent is come into full contact with and is reacted with the flue gas for entering reaction tower and uplink by smoke inlet in reaction tower by spray gun unit, only
Flue gas after change passes through the net gas outlet discharge for reacting column overhead with the vaporizer in liquid neutralizer, and flying dust passes through reaction tower tower
The flying dust at bottom exports discharge, achievees the purpose that remove acid contaminant in flue gas；It, can and after the water in neutralizer completely vaporizes
Flue-gas temperature to follow-up equipment is reduced to be suitble within the temperature range of operation and make not generate waste water in reaction tower；
Into the flow of the neutralizer in spray gun unit, pressure and the flow into the compressed gas in spray gun unit, pressure
The content and flue-gas temperature of acid contaminant are automatically controlled by control unit in the flue gas that power is exported according to net gas；Control unit can
To use single-chip microcontroller, can also be substituted using other other components that can be realized above-mentioned control function, such as CPU, ARM
Processor chips etc. can be used in controlling the driver of flow and pressure by the single-chip microcontroller of drive control valve or switch with reality
Now the purpose of adjustment neutralizer intake parameter, those skilled in the art should be able to know that details are not described herein by the prior art.
The neutralizer supply unit includes that neutralizer preparation module and neutralizer supply module, the neutralizer prepare mould
The output end of block is connect with the input terminal of neutralizer supply module, the output end of described dose of supply module and the input of control unit
End connection；The module selection of neutralizer supply unit belongs to the prior art, and details are not described herein；
It further include the acquisition unit for acquiring pollutant parameter；The output end of the acquisition unit and control unit it is defeated
Enter end connection；Acquisition unit includes flue gas pollutant detection unit and the temperature detecting unit for acquiring flue-gas temperature, institute
The input terminal of the output end and control unit of stating temperature detecting unit connects, and the water in liquid neutralizer is completely vaporised, and is conducive to
Within the temperature range of being reduced to follow-up equipment properly to run flue-gas temperature using the vaporization heat absorption of water, and it is conducive in reaction tower not
Generate waste water；Acquisition unit acquires Gas Parameters and takes in parameter according to Gas Parameters and control unit cooperation control neutralizer,
When control unit system detection to pollutant emission value is less than setting value, the flow control valve of neutralizer feed system subtracts automatically
Few neutralizer enters the flow in spray gun unit, it is ensured that the cavity internal pressure of Venturi tube structure is kept constant；When system detection arrives
When the pollutant of discharge is greater than the set value, the flow control valve aperture of neutralizer feed system increases, and increases and enters spray gun unit
The amount of interior neutralizer, the compressed gas entered in spray gun unit at this time are reduced by the function curve of setting, the chamber of Venturi tube structure
Internal pressure is kept constant, and is atomized conducive to Venturi tube structure to stablizing for gas-liquid mixture therein is entered；Conducive to atomized
Particle stabilized atomization neutralizer, improves the quality and process control stability of depickling processing, to reach continuous and effective removal
The purpose of acid contaminant in flue gas；The working principle of acquisition unit and selection belong to the prior art, those skilled in the art
It should be able to know, details are not described herein.
The beneficial effects of the present invention are: two phase flow semidry method deacidifying flue gas device provided by the invention, by can be realized
The particular spray gun unit of multistage atomizing, neutralizer can be formed by repeatedly atomization into average grain diameter is 30 μm to 100 μm
Molecule greatly increases the specific surface area of neutralizer, considerably increases neutralizer and contacts instead with the pollutant in flue gas
The chance answered achievees the purpose that acid contaminant in removal flue gas, meanwhile, the neutralizer and water mist of liquid are melted into small
Grain does not generate waste water, without frequently cleaning, greatly reduces conducive to the reduction of flue-gas temperature and the dry type operation of reaction tower
Investment and operating cost.
Detailed description of the invention
The invention will be further described with reference to the accompanying drawings and examples:
Fig. 1 is spray gun unit structural schematic diagram of the invention.
Fig. 2 is structural schematic diagram of the invention.
Specific embodiment
Fig. 1 is spray gun unit structural schematic diagram of the invention, and Fig. 2 is structural schematic diagram of the invention, as shown in the figure: this reality
The two phase flow semidry method deacidifying flue gas device for applying example, including include reaction tower 6, be set in the reaction tower spray gun unit 5,
Compressed gas supply unit 3, neutralizer supply unit and control unit 4；The spray gun unit 5 is internally provided with for entrance
Liquid neutralizer in spray gun unit 5 carries out atomization ejection and the multistage atomizing structure to the deacidifying flue gas in reaction tower；It is described
Spray gun unit 5 is the bar shape with sealing structure, and the setting of multistage atomizing structure is in the spray gun unit 5 conducive to liquid neutralization
Agent forms molecule by repeatedly atomization, increases the specific surface area of liquid neutralizer, increases in liquid neutralizer and flue gas
The catalytic chance of pollutant, to achieve the purpose that remove acid contaminant in flue gas；Compression into before spray gun unit 5
The pressure of gas is general constant in 0.35MPa to 0.45MPa, and a higher flow velocity can be provided for compressed gas, makes to compress
High speed atomisation of the gas as medium belt hydrodynamic state neutralizer in spray gun unit 5；The neutralizer supply unit provides liquid
Neutralizer；The compressed gas is preferably compressed air；The spray gun unit 5 is for liquid neutralizer to be sprayed atomizing particle
Fixed spray gun, the preferably described spray gun unit is fixedly installed in the near center location in reaction tower 6；The material of reaction tower 6
Selection belongs to the prior art, such as uses closed steel shell, details are not described herein.
In the present embodiment, the multistage atomizing structure further includes being set at the top of spray gun unit 5 for entrance spray gun list
The neutralizer of member 5 carries out the Venturi tube structure 52 of level-one atomization；The setting of the Venturi tube structure 52 makes compressed gas and liquid
Neutralizer gas-liquid mixture high speed pass through Venturi tube structure 52 after have a pressure drop, conducive to gas-liquid mixture atomization and add
Speed；The Venturi tube structure 52 includes setting gradually as the back taper contraction section of entrance, intermediate venturi 522 and as outlet
Taper diffuser 523；The back taper contraction section includes the 5 top (compression of contraction section 521 and spray gun unit on venturi 522
Under gas and liquid neutralizer entrance) back taper cavity section 57；It is preferred that the Venturi tube structure 52 is located at the top of spray gun unit 5
The internal partial wall (side wall) of portion and the Venturi tube structure 52 and outer wall (side wall) conformal gluing, sealing of the spray gun unit 5 are set
It sets, as using being wholely set, details are not described herein；The back taper contraction section, venturi 522 and taper diffuser 523 are set to
Near the medium position of Venturi tube structure；Middle part herein refers to the axial location of column spray gun unit 5；The back taper is shunk
The cone angle of section is 50 ° -60 °, and preferred cone angle is 60 °；The cone angle of the taper diffuser 523 is 135 ° -145 °, and preferred cone angle is
140°；Under the optimum taper angle of back taper contraction section and taper diffuser 523, more conducively to the atomization of gas-liquid mixture and add
Speed；The atomizing principles of the Venturi tube structure 52 belong to the prior art, and details are not described herein；The cone angle was pyramidal structure
Angle between two tapers that the vertex of a cone and the section for boring the bottom center of circle are intersected with pyramidal structure, belongs to the prior art, no longer superfluous herein
It states.
In the present embodiment, the axial length and back taper contraction section of 523 axial length of taper diffuser, venturi 522
Axial length three be 1:1:8-1:1:12, preferably 1:1:10；Under the optimum ratio, conducive to the mist to gas-liquid mixture
Change and accelerates；The cross-sectional area for the bottom cavity 56 that the cross-sectional area of the venturi 522 and the spray gun unit bottom are formed it
Than for 1:8-1:10, preferably 1:9；Conducive to the flow of gas-liquid mixture is adjusted according to demand, while being conducive to adjust gas
The atomizing effect and raising accelerating velocity of liquid mixture.
In the present embodiment, the multistage atomizing structure further include be set to 5 bottom of spray gun unit and with taper diffuser 523
Outlet is relatively and spaced boss target follows closely 51；51 top of boss target nail is provided with for further to gas-liquid mixture
Collide the plane or globoidal structure of atomization；Boss target nail 51 is set to the bottom of spray gun unit 5 and towards spray gun unit 5
The prominent cylinder or column construction for forming collision atomization in inside, it can also be cambered surface that the boss target nail 51, which can be planar structure,
Structure, the top of the boss target nail 51 and the taper diffuser of Venturi tube structure 52 are spaced in intervals, and are conducive to compressed gas
The atomization to gas-liquid mixture is formed after rushing at atomization platform with the gas-liquid mixture of liquid neutralizer with high speed；It is described
Boss target nail 51 is set to the bottom of spray gun unit 5, for carrying out second level atomization to neutralizer；It is preferred that the mist of boss target nail 51
Change platform and is set to the bottom centre of the spray gun unit 5 and just opposite along axial direction with the cavity of Venturi tube structure 52.
In the present embodiment, the apex area of the boss target nail 51 and the bottom cavity 56 of spray gun unit bottom formation
The ratio between cross-sectional area (the maximum cross-section area) be 1:1.8-1:2.5, preferably 1:2；Under the optimum ratio, more conducively pass through
The gas-liquid mixture that Venturi tube structure 52 is atomized further is atomized the abundant collision of boss target nail 51；The boss target
Nail 51 is 1:1-1:3, preferably 1:2 along axial length ratio along axial length and the bottom cavity 56；It is best at this
Under ratio, more conducively passes through the acceleration for the gas-liquid mixture that Venturi tube structure 52 is atomized and be further conducive to gas-liquid mixture to convex
The collision atomization of platform target nail 51.
In the present embodiment, the bottom cavity 56 that bottom is inverted cone-shaped structure 561 is formed on 5 bottom of spray gun unit, described
The cone angle of inverted cone-shaped structure 561 is 144 ° -156 °；Preferred cone angle is 150 °；Under the optimum taper angle, more conducively by literary mound
In the gas-liquid mixture that is atomized of structure 52 after the further atomization that boss target follow closely further mixing and smoothness be discharged；Institute
The tapered edges for stating inverted cone-shaped structure are the spray gun unit bottom edge of boss target nail surrounding, side-walls of the bottom edge close to spray gun unit
It is formed slopely inclined ramp upwards at the bottom axle center of opposite spray gun unit.
It further include the multiple lance outlets 55 being set in the tapered slope of the inverted cone-shaped structure 561 in the present embodiment；
The diameter of the multiple lance outlet 55 is 1mm-2mm, preferably 1mm；The quantity of the multiple lance outlet 55 is according to reality
Demand setting, the lance outlet 55 as described in being provided with 4-6；It is lesser multiple by biggish 56 entrance aperture of bottom cavity
Lance outlet 55 is conducive to generate biggish pressure drop by the gas-liquid mixture being atomized twice, conducive to the further of gas-liquid mixture
It is atomized (third level atomization) and is discharged.
In the present embodiment, compressed gas entrance 53 is provided at the top of the spray gun unit 5, the compressed gas entrance 53
Outside is provided with multiple neutralizer entrances 54；The centre that the compressed gas entrance 53 is set to 5 top of spray gun unit is attached
Closely, multiple neutralizer entrances 54 are circumferentially arranged at the surrounding of compressed gas entrance 53；The compressed gas entrance 53
The ratio between cross-sectional area of cross-sectional area and all neutralizer entrances 54 is 1:1-1:1.5, preferably 1:1.2；In suitable
With agent and the intake of the compressed gas with certain pressure；The quantity of the neutralizer entrance 53 is arranged according to actual needs is
Can, the neutralizer entrance 53 as described in being provided with 2-4.
In the present embodiment, the tower body sidewall bottom of the reaction tower 6 is provided with smoke inlet 8, enters the cigarette for making
The flue gas uplink of gas entrance 8 simultaneously with spray gun unit 5 spray atomization neutralizer contact purification in reaction tower 6, conducive to flue gas into
With bigger contact surface area haptoreaction between atomization neutralizer under entering uplink after smoke inlet 8 and being sprayed by spray gun unit 5,
It is more uniform to the neutralization reaction of flue gas conducive to atomization neutralizer；The flue gas is acidic flue gas；Net gas outlet 7 is set to described
The tower top of reaction tower 6 is quickly discharged out of reaction tower 6 conducive to the flue gas after neutralization, improves for excluding purified flue gas
Treatment effeciency；Flue gas after neutralization enters subsequent processing facility by net gas outlet 7；Flying dust outlet 9 is set to the reaction tower 6
Tower bottom be used to that the flying dust that generates when purifying be discharged；The sedimentation and exclusion of the flying dust generated when conducive to purification, conducive to avoiding to anti-
Answer the frequent cleaning of tower 6 and spray gun unit 5.
In the present embodiment, further includes compressed gas supply unit 3, the neutralizer after preparation is sent to spray gun unit 5
Neutralizer supply unit and the control unit 4 that parameter is taken in for controlling the neutralizer；The neutralizer supply unit and control
The input terminal of unit 4 processed connects, and the compressed gas supply unit 3 is connect with the input terminal of control unit 4, described control unit
4 output end is connect with the input terminal of spray gun unit 5；
It is prepared by neutralizer supply unit and the alkali liquid neutralizer after preparation is sent to spray gun unit 5, passed through
Neutralizer intake parameter is adjusted neutralizer is added and carries out multistage atomizing processing to neutralizer by spray gun unit 5；After atomization
Neutralizer by spray gun unit 5 to being come into full contact in reaction tower 6 by the flue gas that smoke inlet 8 enters reaction tower 6 and uplink and
Vaporizer in reaction, purified flue gas and liquid neutralizer is discharged by the net gas outlet 7 of 6 tower top of reaction tower, and flying dust is logical
9 discharge of flying dust outlet for crossing 6 tower bottom of reaction tower, achievees the purpose that remove acid contaminant in flue gas；And the water in neutralizer
After completely vaporizing, flue-gas temperature to follow-up equipment can be reduced and be suitble within the temperature range of operation and make not generating in reaction tower 6 useless
Water；
Into the flow of the neutralizer in spray gun unit 5, pressure and enter spray gun unit 5 in compressed gas flow,
Pressure is automatically controlled according to the content and flue-gas temperature of acid contaminant in the flue gas of net gas outlet 7 by control unit 4；Control is single
Member 4 can use single-chip microcontroller, can also be substituted using other other components that can be realized above-mentioned control function, such as
CPU, arm processor chip etc. can be used in controlling the drive of flow and pressure by the single-chip microcontroller of drive control valve or switch
Dynamic device is to realize that adjustment neutralizer takes in the purpose of parameter, and those skilled in the art should be able to be known by the prior art, herein
It repeats no more；
The neutralizer supply unit includes neutralizer preparation module 1 and neutralizer supply module 2, the neutralizer preparation
The output end of module 1 is connect with the input terminal of neutralizer supply module 2, the output end and control unit 4 of described dose of supply module 1
Input terminal connection；The module selection of neutralizer supply unit belongs to the prior art, and details are not described herein；
It further include the acquisition unit for acquiring pollutant parameter；The output end of the acquisition unit and control unit 4
Input terminal connection；Acquisition unit includes flue gas pollutant detection unit and the temperature detecting unit for acquiring flue-gas temperature,
The output end of the temperature detecting unit is connect with the input terminal of control unit 4, and the water in liquid neutralizer is completely vaporised, benefit
Within the temperature range of being reduced to follow-up equipment properly to run flue-gas temperature using the vaporization of water heat absorption, and it is conducive to reaction tower 6
Waste water is not generated inside；Acquisition unit acquires Gas Parameters and according to Gas Parameters and the cooperation control neutralizer intake of control unit 4
Parameter, when 4 system detection of control unit to pollutant emission value is less than setting value, the flow control valve of neutralizer feed system
The automatic neutralizer that reduces enters the flow in spray gun unit 5, it is ensured that the cavity internal pressure of Venturi tube structure 52 is kept constant；When being
When system detects that the pollutant of discharge is greater than the set value, the flow control valve aperture of neutralizer feed system increases, and increases and enters
The amount of neutralizer in spray gun unit 5, the compressed gas entered in spray gun unit 5 at this time are reduced by the function curve of setting, literary mound
In the cavity internal pressure of structure 52 keep constant, the stabilization mist of gas-liquid mixture therein is entered conducive to 52 pairs of Venturi tube structure
Change, conducive to atomized particle stabilized atomization neutralizer, the quality and process control stability of depickling processing is improved, to reach
The purpose of acid contaminant into continuous and effective removal flue gas；Acquisition unit does not mark in figure, the working principle of acquisition unit
And select and belong to the prior art, those skilled in the art should be able to know that details are not described herein.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (10)
1. a kind of two phase flow semidry method deacidifying flue gas device, it is characterised in that: including reaction tower, be set in the reaction tower
Spray gun unit, compressed gas supply unit, neutralizer supply unit and control unit；The spray gun unit, which is internally provided with, to be used for
Atomization ejection is carried out to the neutralizer entered in spray gun unit and to the multistage atomizing structure of the deacidifying flue gas in reaction tower.
2. two phase flow semidry method deacidifying flue gas device according to claim 1, it is characterised in that: the multistage atomizing structure
Including being set at the top of spray gun unit for carrying out the Venturi tube structure of level-one atomization to the neutralizer for entering spray gun unit；It is described
Venturi tube structure includes setting gradually as the back taper contraction section of entrance, intermediate venturi and as the taper diffusion of outlet
Section；The cone angle of the back taper contraction section is 50 ° -60 °, and the cone angle of the taper diffuser is 135 ° -145 °.
3. two phase flow semidry method deacidifying flue gas device according to claim 2, it is characterised in that: the taper diffuser axis
The ratio between axial length to length, the axial length of venturi and back taper contraction section is 1:1:8-1:1:12；The cross of the venturi
The ratio between the bottom cavity cross-sectional area that sectional area and the spray gun unit bottom are formed is 1:8-1:10.
4. two phase flow semidry method deacidifying flue gas device according to claim 2, it is characterised in that: the multistage atomizing structure
It further include being set to spray gun unit bottom and the opposite and spaced boss target nail with the outlet of taper diffuser；The boss target
Screw top portion is provided with plane or globoidal structure for further hitting against atomization to gas-liquid mixture.
5. two phase flow semidry method deacidifying flue gas device according to claim 4, it is characterised in that: the top of the boss target nail
The ratio between the cross-sectional area of bottom cavity that end area and the spray gun unit bottom are formed is 1:1.8-1:2.5, the boss target
Following closely along the axial length ratio of axial length and bottom cavity edge is 1:1-1:3.
6. two phase flow semidry method deacidifying flue gas device according to claim 1, it is characterised in that: the spray gun unit bottom
The bottom cavity of formation is inverted cone-shaped structure；The cone angle of the inverted cone-shaped structure is 144 ° -156 °.
7. two phase flow semidry method deacidifying flue gas device according to claim 6, it is characterised in that: the inverted cone-shaped structure
Multiple lance outlets are provided in tapered slope；The diameter of the multiple lance outlet is 1mm-2mm.
8. two phase flow semidry method deacidifying flue gas device according to claim 1, it is characterised in that: at the top of the spray gun unit
It is provided with compressed gas entrance, multiple neutralizer entrances are provided on the outside of the compressed gas entrance；The compressed gas enters
The ratio between cross-sectional area and the cross-sectional area of all neutralizer entrances of mouth are 1:1-1:1.5.
9. two phase flow semidry method deacidifying flue gas device according to claim 1, it is characterised in that: the tower body of the reaction tower
Sidewall bottom is provided with smoke inlet, the atomization for making the flue gas uplink into the smoke inlet and spraying with spray gun unit
Neutralizer contacts purification in reaction tower；Net gas outlet is set to the tower top of the reaction tower, for excluding purified flue gas；
The tower bottom that flying dust outlet is set to the reaction tower is used to that the flying dust generated when purification to be discharged.
10. two phase flow semidry method deacidifying flue gas device according to claim 1, it is characterised in that: compressed gas supply is single
The member neutralizer supply unit and the input terminal of control unit connect, the compressed gas supply unit and control unit it is defeated
Enter end connection, the output end of described control unit and the input terminal of spray gun unit connect；
The neutralizer supply unit includes neutralizer preparation module and neutralizer supply module, and the neutralizer prepares module
Output end is connect with the input terminal of neutralizer supply module, and the output end of described dose of supply module and the input terminal of control unit connect
It connects；
It further include the acquisition unit for acquiring pollutant parameter；The output end of the acquisition unit and the input terminal of control unit
Connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910585210.4A CN110237691A (en) | 2019-07-01 | 2019-07-01 | Two phase flow semidry method deacidifying flue gas device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910585210.4A CN110237691A (en) | 2019-07-01 | 2019-07-01 | Two phase flow semidry method deacidifying flue gas device |
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| CN110237691A true CN110237691A (en) | 2019-09-17 |
Family
ID=67890529
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| CN201910585210.4A Withdrawn CN110237691A (en) | 2019-07-01 | 2019-07-01 | Two phase flow semidry method deacidifying flue gas device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113414020A (en) * | 2021-05-19 | 2021-09-21 | 山东省农业机械科学研究院 | Gas-liquid two-phase high-voltage electrostatic spray head and spray device |
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| EP1748162A1 (en) * | 2005-07-28 | 2007-01-31 | Hitachi, Ltd. | Exhaust aftertreatment system using urea water |
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Application publication date: 20190917 |