CN110841426B - Waste gas desulfurization and denitrification treatment device - Google Patents
Waste gas desulfurization and denitrification treatment device Download PDFInfo
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- CN110841426B CN110841426B CN201911331656.0A CN201911331656A CN110841426B CN 110841426 B CN110841426 B CN 110841426B CN 201911331656 A CN201911331656 A CN 201911331656A CN 110841426 B CN110841426 B CN 110841426B
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 53
- 230000023556 desulfurization Effects 0.000 title claims abstract description 53
- 239000002912 waste gas Substances 0.000 title abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 161
- 238000010521 absorption reaction Methods 0.000 claims abstract description 97
- 230000001502 supplementing effect Effects 0.000 claims abstract description 45
- 239000007789 gas Substances 0.000 claims abstract description 44
- 239000000428 dust Substances 0.000 claims abstract description 13
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 13
- 230000003647 oxidation Effects 0.000 claims abstract description 11
- 239000012530 fluid Substances 0.000 claims description 61
- 238000001802 infusion Methods 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 28
- 239000002699 waste material Substances 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims 1
- 239000003546 flue gas Substances 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 20
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002637 fluid replacement therapy Methods 0.000 description 3
- 239000002440 industrial waste Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
Classifications
-
- 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
- B01D53/14—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 by absorption
- B01D53/1456—Removing acid components
- B01D53/1481—Removing sulfur dioxide or sulfur trioxide
-
- 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
- B01D53/14—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 by absorption
-
- 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
- B01D53/14—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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses an exhaust gas desulfurization and denitrification treatment device which comprises an air inlet pipe, a dust removing device, an air inlet fan, an oxidation device, a desulfurization and denitrification tank, a driving device, a tail gas discharge pipe and an absorption liquid supplementing device, wherein the dust removing device, the air inlet fan and the oxidation device are sequentially arranged on the air inlet pipe along the air flow direction, the desulfurization and denitrification tank is connected with the air inlet pipe, the driving device is connected with the desulfurization and denitrification tank through a first air conveying pipeline, and the tail gas discharge pipe is connected with the driving device. According to the waste gas desulfurization and denitrification treatment device, dust removal and oxidization are firstly carried out on waste gas, then the waste gas is introduced into the desulfurization and denitrification tank, desulfurization and denitrification treatment is carried out by utilizing the absorption liquid, and finally clean gas is discharged through the tail gas discharge pipe; the invention utilizes the power of the gas exhausted by the tank body to drive the driving impeller to rotate, thereby driving the disc to rotate, reducing a driving motor and reducing energy consumption by taking the exhaust of the driving impeller as a power source.
Description
Technical Field
The invention relates to the field of waste gas treatment, in particular to a waste gas desulfurization and denitrification treatment device.
Background
At present, a large amount of industrial waste gas is inevitably generated while industrialization is rapidly developed, and the industrial waste gas can influence normal production of a factory and can cause serious pollution to the environment, so that how to effectively reduce pollution caused by the industrial waste gas becomes a problem which needs to be solved urgently at present. Such as coking plants, thermal power plants, etc., can produce a large amount of SO 2 、SO 3、 NO X The pollutant is a significant air pollution source and can be discharged only through desulfurization and denitrification treatment. In the existing desulfurization and denitrification treatment process, the wet process technology of adopting the reaction of the absorption liquid and the waste gas to carry out desulfurization and denitrification is widely applied, wherein the adopted absorption liquid needs to have the removal effect on sulfur and nitrate, so that desulfurization and denitrification can be simultaneously carried out.
When the absorption liquid is used for reacting with the waste gas to perform desulfurization and denitrification, one of the important factors of good desulfurization and denitrification effects is whether the waste gas is fully contacted with the absorption liquid or not. The conventional method adopts a treatment tower, and realizes the contact reaction of the waste gas and the absorption liquid by a countercurrent contact mode of waste gas up-flow and absorption liquid down-flow. The effect of the contact of the exhaust gas with the absorption liquid mainly depends on whether the exhaust gas is flowing upward, whether the absorption liquid is flowing downward uniformly, whether the amount of the absorption liquid flowing downward is sufficient, etc. Therefore, a large amount of absorption liquid is always required to be sprayed downwards, so that the problems that the absorption liquid is wasted greatly or the contact between the waste gas and the absorption liquid is insufficient in the conventional mode, the desulfurization and denitrification effects are affected and the like are easy to exist. Therefore, a more reliable desulfurization and denitrification scheme is now needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a waste gas desulfurization and denitrification treatment device aiming at the defects in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme: the exhaust gas desulfurization and denitrification treatment device comprises an air inlet pipe, a dust removal device, an air inlet fan, an oxidation device, a desulfurization and denitrification tank, a driving device, a tail gas discharge pipe and an absorption liquid supplementing device, wherein the dust removal device, the air inlet fan and the oxidation device are sequentially arranged on the air inlet pipe along the air flow direction;
the desulfurization and denitrification tank comprises a tank body, a rotating shaft rotatably arranged in the tank body along the horizontal direction and at least one disc fixedly connected to the rotating shaft, wherein absorption liquid is contained in the tank body, and one part of the disc is immersed in the absorption liquid;
the driving device comprises a box body and a driving impeller which is rotatably arranged in the box body and connected with the rotating shaft, wherein a first air outlet of the tank body is communicated with a second air inlet of the box body through a first air conveying pipeline, so that the driving impeller is driven to rotate by air exhausted from the tank body, and the disc coaxial with the driving impeller is driven to rotate.
Preferably, the tank body is cylindrical, and the central axis of the tank body coincides with the axis of the rotating shaft; the outer peripheral side wall of the tank body protrudes outwards to form annular containing cavities with the same number as the discs, and the discs are rotatably arranged in the annular containing cavities.
Preferably, the disc comprises a disc body, disc-shaped supporting nets arranged on two side surfaces of the disc body and a shaft hole formed in the middle of the disc body and through which the rotating shaft passes;
the diameters of the two disc-shaped supporting nets are larger than the diameter of the disc body, an annular groove is formed between the periphery of the two disc-shaped supporting nets and the peripheral side wall of the disc body, a plurality of ejector rods fixedly connected with the peripheral side wall of the disc body are arranged in an annular array in the annular groove, and the outer ends of the ejector rods extend out of the annular groove; the disc body is internally provided with a porous structure.
Preferably, the outer end of the ejector rod has an arc-shaped guide surface.
Preferably, a fixing threaded hole for the ejector rod to be inserted is formed in the inner wall of the bottom of the annular groove, a threaded portion matched with the fixing threaded hole is arranged at the inner end of the ejector rod, and a convex column is arranged in the middle of the ejector rod.
Preferably, the ejector rod is a telescopic rod, which comprises a thick rod fixedly connected with the inner wall of the bottom of the annular groove, a jack formed in the thick rod, a thin rod telescopically inserted in the jack, a locking threaded hole formed in the side wall of the thick rod and penetrating through the jack, and a locking stud inserted in the locking threaded hole, wherein the inner end of the locking stud, which is used for being abutted against the thin rod, is arc-shaped, and the arc-shaped guide surface is arranged at the upper end of the thin rod.
Preferably, the absorption liquid supplementing device comprises a first liquid supplementing device and a second liquid supplementing device, wherein the first liquid supplementing device comprises a first liquid storage tank for storing absorption liquid, an automatic liquid supplementing box connected with the first liquid storage tank through a first liquid supplementing pipeline, and an automatic liquid discharging mechanism arranged in the automatic liquid supplementing box.
Preferably, the automatic fluid infusion box is fixedly connected with the outer wall of the annular accommodating cavity, and a fluid infusion hole communicated with the annular accommodating cavity is formed in a bottom plate of the automatic fluid infusion box;
the automatic liquid discharging mechanism comprises a loop bar fixedly connected with a top plate of the automatic liquid supplementing box, an inner bar which is telescopically inserted into the loop bar from bottom to top, a sealing ball fixedly connected to the bottom end of the inner bar, and a pressure spring sleeved outside the inner bar and Zhou Juka and arranged between the loop bar and the sealing ball;
the diameter of the sealing ball is larger than the diameters of the inner rod and the fluid supplementing hole; and the lower end of the sealing ball is propped against the fluid supplementing hole without external force, so that the fluid supplementing hole is sealed.
Preferably, the second fluid infusion device comprises a second fluid reservoir communicated with a fluid inlet arranged on the tank body through a second fluid infusion pipeline and a fluid infusion pump arranged on the second fluid infusion pipeline.
Preferably, the box body is also provided with a second air outlet, and the second air outlet is communicated with the tail gas discharge pipe through a second gas pipeline;
the tank body is also provided with a waste liquid discharge port, and the waste liquid discharge port is connected with a waste liquid storage tank through a pipeline.
The beneficial effects of the invention are as follows:
according to the waste gas desulfurization and denitrification treatment device, dust removal and oxidization are firstly carried out on waste gas, then the waste gas is introduced into the desulfurization and denitrification tank, desulfurization and denitrification treatment is carried out by utilizing the absorption liquid, and finally clean gas is discharged through the tail gas discharge pipe;
according to the waste gas desulfurization and denitrification treatment device, the disc rotates, the porous structure of the waste gas is continuously immersed in the absorption liquid to supplement new absorption liquid for the disc, and when the waste gas penetrates through the disc, the waste gas fully reacts with the absorption liquid in the disc, so that the contact effect of the waste gas and the absorption liquid can be improved, and the desulfurization and denitrification effect is improved;
the invention uses the power of the gas exhausted from the tank body to drive the driving impeller to rotate, thereby driving the disc to rotate, and reduces a driving motor and energy consumption by taking the exhaust of the driving impeller as a power source;
according to the invention, by arranging the automatic liquid discharging mechanism, the absorption liquid contained in the automatic liquid supplementing box can automatically flow out at intervals by utilizing the rotation of the disc, and enter the tank body, the absorption liquid flowing out of the automatic liquid supplementing box is dripped into the annular groove and enters the disc, and then flows downwards along the disc, so that the disc is further filled with the absorption liquid all the time, the absorption liquid can be continuously supplemented for the disc from the upper part, the waste gas is fully contacted with the absorption liquid, and the desulfurization and denitrification effects can be further improved.
Drawings
FIG. 1 is a schematic diagram of the exhaust gas desulfurization and denitrification treatment device;
FIG. 2 is a front view of the can of the present invention;
FIG. 3 is a side view of the can of the present invention;
FIG. 4 is a schematic view of a radial cross-sectional configuration of the disk of the present invention;
FIG. 5 is a schematic view of the disk of the present invention in cross-section in the axial direction;
FIG. 6 is a schematic view of the structure of the ejector rod and the automatic liquid discharge mechanism of the invention when the liquid supplementing hole is opened in a matched manner;
FIG. 7 is a schematic view of a partially enlarged structure of the ejector pin and automatic tapping mechanism of the present invention;
FIG. 8 is a schematic diagram of the structure of the ejector rod and the automatic liquid discharge mechanism when the liquid supplementing hole is sealed;
FIG. 9 is a schematic diagram of a driving apparatus according to the present invention;
FIG. 10 is a schematic view of a mandrel in another embodiment of the present invention;
fig. 11 is a schematic structural view of a mandrel according to another embodiment of the present invention.
Reference numerals illustrate:
1-an air inlet pipe; 10-a dust removal device; 11-an air inlet fan; 12-an oxidation unit;
2-a desulfurization and denitrification tank; 20-a first air inlet; 21-a first air outlet; 22-a rotating shaft; 23-a disc; 24-an annular receiving cavity; 25-liquid inlet; 26-a waste liquid discharge port; 27-a waste liquid storage tank; 28-a first gas pipeline; 29-a tank body; 230-a disc body; 231-a disc-shaped support net; 232-shaft hole; 233-an annular groove; 234-push rod; 235-an arcuate guide surface; 2340-threaded portion; 2341-posts; 2342—thick bar; 2343-jack; 2344—thin rod; 2345-locking threaded holes; 2346-locking studs;
3-a driving device; 30-driving the impeller; 31-a second air inlet; 32-a second air outlet; 33-a second gas transmission pipeline; 34-a box body;
4-an absorption liquid replenishing device; 40-a first fluid replacement device; 41-a first fluid reservoir; 42-a first fluid replacement pipeline; 43-mounting rack; 44-a second fluid replacement device; 45-a second fluid infusion line; 46-a second fluid reservoir; 47-a fluid infusion pump;
5-an automatic fluid infusion box; 50-an automatic liquid discharge mechanism; 51-a bottom plate; 52-top plate; 53-fluid supplementing holes; 500-loop bar; 501-an inner rod; 502-a sealing ball; 503-a compression spring;
and 6, a tail gas discharge pipe.
Detailed Description
The present invention is described in further detail below with reference to examples to enable those skilled in the art to practice the same by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
As shown in fig. 1 to 9, an exhaust gas desulfurization and denitrification treatment device of the present embodiment includes an intake pipe 1, a dust removal device 10, an intake fan 11, and an oxidation device 12 which are sequentially disposed on the intake pipe 1 in an air flow direction, a desulfurization and denitrification tank 2 connected with the intake pipe 1, a driving device 3 connected with the desulfurization and denitrification tank 2 through a first air pipe 28, an exhaust gas discharge pipe 6 connected with the driving device 3, and an absorption liquid replenishing device 4;
the desulfurization and denitrification tank 2 comprises a tank body 29, a rotating shaft 22 rotatably arranged in the tank body 29 along the horizontal direction and at least one disc 23 fixedly connected to the rotating shaft 22, wherein the tank body 29 is internally provided with absorption liquid, and part of the disc 23 is immersed in the absorption liquid; the tank 29 is provided with a first air inlet 20 and a first air outlet 21;
the driving device 3 comprises a box 34 and a driving impeller 30 rotatably arranged in the box 34 and connected with the rotating shaft 22, the box 34 is provided with a second air inlet 31 and a second air outlet 32, the first air outlet 21 of the tank 29 is communicated with the second air inlet 31 of the box 34 through a first air pipeline 28, so that the driving impeller 30 is driven to rotate by the air discharged from the tank 29, and the disc 23 coaxial with the driving impeller 30 is driven to rotate.
The second air outlet 32 is communicated with the tail gas discharge pipe 6 through a second air transmission pipeline 33;
the tank 29 is also provided with a waste liquid discharge port 26, and the waste liquid discharge port 26 is connected with a waste liquid storage tank 27 through a pipeline.
The waste gas desulfurization and denitrification treatment device is arranged at the exhaust end of the waste gas emission system, is used for carrying out desulfurization and denitrification treatment on waste gas and then discharging the waste gas, and is mainly used for carrying out desulfurization and denitrification treatment on waste gas of factories, waste gas of thermal power plants and the like. The invention carries out desulfurization and denitrification by reacting the absorption liquid with the waste gas so as to ensure that the discharged gas meets the emission standard. Wherein the absorption liquid is selected from conventional products, and absorption liquid capable of desulfurizing and denitrating simultaneously, such as calcium hydroxide slurry and NaClO 2 NaClO composite absorption liquid or other conventional absorption liquid capable of desulfurizing and denitrating simultaneously.
In the present invention, the disc 23 itself has a porous structure that is air-permeable, and exhaust gas can pass through the disc 23. The impeller 30 is driven to rotate by the power of the gas exhausted from the tank 29, so that the disc 23 is driven to rotate, when the disc 23 rotates, the bottom of the disc 23 is continuously immersed in the absorption liquid to supplement the disc 23 with new absorption liquid, and when the waste gas permeates the disc 23, the waste gas fully reacts with the absorption liquid in the disc 23 to realize desulfurization and denitrification. By using the exhaust of the self-body as a power source, one driving motor is reduced, the energy consumption is reduced, and meanwhile, the desulfurization and denitrification effects are improved through the continuous rotation of the disc 23.
The waste gas is subjected to dust removal by a dust remover and oxidation treatment by an oxidation device 12 under the action of an air inlet fan 11, enters a tank 29, sequentially passes through a plurality of discs 23 from left to right, is subjected to desulfurization and denitrification by reacting with absorption liquid, and then enters a box 34 to drive a driving impeller 30 to rotate; the gas discharged from the tank 34 is then introduced into the exhaust gas discharge pipe 6 to be discharged at high altitude. Wherein the dust remover is used for removing particulate matters in the waste gas, is beneficial to subsequent treatment, and can selectWith a conventional bag filter. The oxidation device 12 oxidizes NO in the exhaust gas into NO by a strong oxidant (such as ozone or hydrogen peroxide) 2 To remove NO in the subsequent desulfurization and denitrification tank 2 2 Can improve the subsequent denitration effect. The oxidizing device 12 may be selected from conventional devices, and in this embodiment, the ozone oxidizing device 12 is selected.
Specifically, in this embodiment, referring to fig. 1 to 9, the tank 29 is cylindrical, and its central axis coincides with the axis of the rotating shaft 22; the outer peripheral side wall of the can 29 is outwardly projected to form annular accommodating chambers 24 in the same number as the disks 23, and the disks 23 are rotatably disposed in the annular accommodating chambers 24. The number of discs 23 and annular receiving cavities 24 in this embodiment is 3.
The disc 23 comprises a disc body 230, disc-shaped supporting nets 231 arranged on two sides of the disc body 230, and a shaft hole 232 arranged in the middle of the disc body 230 and through which the rotating shaft 22 passes; the rotating shaft 22 is rotatably connected with the tank 29 and the box 34, and the disc 23 and the driving impeller 30 are fixedly connected on the rotating shaft 22. The disk-shaped supporting net 231 can enhance the mechanical strength of the disk body 230, allowing exhaust gas to pass through. Can be made of corrosion-resistant metal or hard plastic.
The diameters of the two disc-shaped supporting nets 231 are larger than the diameter of the disc body 230, an annular groove 233 is formed between the outer periphery of the two disc-shaped supporting nets 231 and the outer peripheral side wall of the disc body 230, a plurality of ejector rods 234 fixedly connected with the outer peripheral side wall of the disc body 230 are arranged in an annular array in the annular groove 233, and the outer ends of the ejector rods 234 extend out of the annular groove 233. The two disk-shaped supporting nets 231 have a diameter smaller than the outer diameter of the annular receiving chamber 24 and larger than the inner diameter of the can 29, so that the amount of exhaust gas flowing directly from the gap between the disk 23 and the can 29 without passing through the disk 23 can be greatly reduced; at the same time, the disk 23 is guaranteed to rotate freely in the annular receiving chamber 24. The disc body 230 has a porous structure inside, so that exhaust gas can pass through the disc body 230, and the disc body 230 has a good adsorption effect on the absorption liquid, so that the disc body 230 can be filled with the absorption liquid. In this embodiment, the disc body 230 is made of carbon fiber, and has densely distributed micropores therein, and exhaust gas can pass through the disc-shaped supporting net 231 and the disc body 230.
Further, the outer end of the push rod 234 has an arcuate guide surface 235.
The absorption liquid replenishing device 4 comprises a first liquid replenishing device 40 and a second liquid replenishing device 44, wherein the first liquid replenishing device 40 comprises a first liquid storage tank 41 for storing absorption liquid, an automatic liquid replenishing box 5 connected with the first liquid storage tank 41 through a first liquid replenishing pipeline 42, and an automatic liquid discharging mechanism 50 arranged in the automatic liquid replenishing box 5. The first reservoir 41 is secured to the tank 29 by a mounting bracket 43.
The automatic fluid infusion box 5 is fixedly connected with the outer wall of the annular accommodating cavity 24, and the automatic fluid infusion box 5 is internally filled with absorption fluid. The bottom plate 51 of the automatic fluid infusion box 5 is provided with a fluid infusion hole 53 communicated with the annular containing cavity 24, and the automatic fluid release mechanism 50 comprises a sleeve rod 500 fixedly connected with the top plate 52 of the automatic fluid infusion box 5, an inner rod 501 which is telescopically inserted into the sleeve rod 500 from bottom to top, a sealing ball 502 fixedly connected to the bottom end of the inner rod 501, and a pressure spring 503 sleeved outside the inner rod 501 and Zhou Juka and arranged between the sleeve rod 500 and the sealing ball 502; the diameter of the sealing ball 502 is larger than the diameters of the inner rod 501 and the fluid supplementing hole 53; when no external force acts, the lower end of the sealing ball 502 is pressed against the fluid infusion hole 53, so that the fluid infusion hole 53 is sealed. When an external force acts, the sealing ball 502 moves upwards, the compression spring 503 is compressed, the inner rod 501 moves upwards relative to the sleeve rod 500, the sealing ball 502 is separated from the fluid supplementing hole 53, the fluid supplementing hole 53 is opened, and the absorption liquid can flow downwards through the fluid supplementing hole 53 and enter the tank 29. The loop bar 500 serves to guide the inner bar 501, and restrict the inner bar 501 to slide up and down only.
When the absorption liquid is used for reacting with the waste gas to perform desulfurization and denitrification, one of the important factors of good desulfurization and denitrification effects is whether the waste gas is fully contacted with the absorption liquid or not. The conventional method adopts a treatment tower, and realizes the contact reaction of the waste gas and the absorption liquid by a countercurrent contact mode of waste gas up-flow and absorption liquid down-flow. The effect of the contact of the exhaust gas with the absorption liquid depends mainly on whether the exhaust gas is flowing upward uniformly, whether the absorption liquid is flowing downward uniformly, and whether the amount of absorption liquid flowing downward is sufficient. It is generally necessary to ensure that a large amount of absorption liquid is sprayed downward constantly, and the amount of intake air of the exhaust gas is also greatly limited. Therefore, the conventional method has the problems of large waste of the absorption liquid, large energy consumption for transporting the absorption liquid (the absorption liquid is usually conveyed and sprayed continuously through a pump), insufficient contact between the waste gas and the absorption liquid, influence on desulfurization and denitrification effects and the like. The invention can well solve the problem that the contact between the waste gas and the absorption liquid is still insufficient.
In the invention, the disc 23 continuously rotates, so that the disc 23 can continuously absorb the absorption liquid at the lower part of the tank 29, and the disc 23 is continuously supplemented with the absorption liquid from the lower part, thereby ensuring the amount of the absorption liquid in the disc 23 and the desulfurization and denitrification effect. The invention further utilizes the rotation of the disc 23 to enable the absorption liquid contained in the automatic liquid supplementing box 5 to flow out at intervals automatically, enter the tank 29, drop the absorption liquid flowing out of the automatic liquid supplementing box 5 into the annular groove 233, enter the disc 23 and flow downwards along the disc 23, so that the disc 23 is filled with the absorption liquid all the time, the disc 23 can be continuously supplemented with the absorption liquid from above, the waste gas is fully contacted with the absorption liquid, and the desulfurization and denitrification effects are further improved. Since the liquid level of the absorbing liquid in the tank 29 is limited and the liquid level is preferably not so high that the rotating shaft 22 is immersed, the disc 23 can be immersed only partially in the absorbing liquid, and the disc 23 can be limited in the amount of absorbing liquid supplied through the lower part and the amount of absorbing liquid in the disc 23 can be ensured by adding the absorbing liquid to the upper part once.
Specifically, the gas discharged from the first gas outlet 21 of the tank 29 drives the driving impeller 30 to rotate, and drives the disc 23 to rotate through the rotating shaft 22, so that different areas of the periphery of the disc 23 are continuously immersed in the absorption liquid, and the absorption liquid is replenished to the disc 23. The outer end of the push rod 234 extends out of the annular groove 233, and when the disc 23 rotates, the outer end of the push rod 234 can contact the sealing ball 502 and does not contact the bottom plate 51 of the automatic fluid infusion cartridge 5. Referring to fig. 6 and 7, when the disc 23, the arc-shaped guide surface 235 at the outer end of the push rod 234 contacts with the bottom of the sealing ball 502, and the inner rod 501 moves linearly upward under the guiding action of the sleeve rod 500 as the push rod 234 rotates, the compression spring 503 is pressed, the sealing ball 502 is separated from the fluid supplementing hole 53, the fluid supplementing hole 53 is opened, the absorption fluid flows downward through the fluid supplementing hole 53 and enters the tank 29, the absorption fluid drops into the annular groove 233, enters the disc 23 and flows downward along the disc 23, and the absorption fluid is automatically supplemented to the disc 23. Referring to fig. 8, when the push rod 234 continues to rotate beyond the sealing ball 502, under the downward elastic force of the compression spring 503, the inner rod 501 drives the sealing ball 502 to move downward, and pushes against the fluid infusion hole 53, so that the fluid infusion hole 53 is sealed, and the absorption fluid is prevented from continuing to flow out. The automatic liquid discharging mechanism 50 can automatically and intermittently open the liquid supplementing hole 53 to supplement the absorption liquid for the disc 23 from the upper part, so that the disc 23 can be ensured to be filled with the absorption liquid, and the absorption liquid waste caused by continuous liquid supplementing can be prevented. The amount of absorption liquid supplied from above can be adjusted by increasing the number of the push rods 234 or adjusting the length of the push rods 234 extending out of the annular groove 233: the greater the quantity, the greater the quantity of supplemental absorption liquid. The greater the length of the push rod 234 extending out of the annular groove 233, the higher the height of the push rod 234 pushing up the sealing ball 502, and the greater the amount of absorption liquid that flows out.
When the intake air amount is larger, the amount of air discharged from the tank 29 is larger, the rotation speed of the driving impeller 30 is also larger, the rotation speed of the disc 23 is increased, the amount of absorption liquid sucked from the lower side by the disc 23 is increased, the absorption liquid in the upper flow path of the automatic liquid discharging mechanism 50 is also increased (after the rotation speed of the disc 23 is increased, the interval for opening the liquid supplementing holes 53 each time is shortened), the effect of supplementing the absorption liquid by the disc 23 is enhanced, and finally, the desulfurization and denitrification effects of the disc 23 on the waste gas can be synchronously enhanced. So as to automatically adapt to the change of the air inlet load in a certain range: the larger the air inflow is, the stronger the effect of supplementing the absorption liquid by the disc 23 is, and the desulfurization and denitrification effects can be ensured; when the intake air amount is reduced, the absorption liquid supplied from the disc 23 is reduced, and the absorption liquid consumption can be reduced.
Wherein, the arc-shaped guide surface 235 at the outer end of the ejector rod 234 enables the ejector rod 234 to contact with the sealing ball 502 through the arc surface, which is beneficial for the ejector rod 234 to push the sealing ball 502 to move upwards and prevents the movement from being blocked.
The sealing ball 502 is preferably a ball with a certain elasticity, or an elastic sealing member is arranged on the sealing ball 502 or the fluid filling hole 53, so as to ensure that the sealing ball 502 has a good sealing effect when pressed on the fluid filling hole 53 and prevent leakage.
In a further preferred embodiment, referring to fig. 10, a fixing screw hole into which the push rod 234 is inserted is opened on the bottom inner wall of the annular groove 233, the inner end of the push rod 234 is provided with a screw portion 2340 engaged with the fixing screw hole, and the middle of the push rod 234 is provided with a boss 2341. The length of the push rod 234 extending out of the annular groove 233 can be adjusted by adjusting the depth of the push rod 234 screwed into the fixing threaded hole, so that the amount of the absorption liquid flowing out of the liquid supplementing hole 53 can be adjusted. The provision of the boss 2341 facilitates rotation of the push rod 234. The push rod 234 can be rotated by holding the boss 2341.
In another further preferred embodiment, referring to fig. 11, the push rod 234 is a telescopic rod, which includes a thick rod 2342 fixedly connected to the bottom inner wall of the annular groove 233, an insertion hole 2343 formed in the thick rod 2342, a thin rod 2344 telescopically inserted in the insertion hole 2343, a locking threaded hole 2345 formed inwardly from the side wall of the thick rod 2342 and penetrating into the insertion hole 2343, and a locking stud 2346 inserted in the locking threaded hole 2345, wherein the inner end of the locking stud 2346 for abutting against the thin rod 2344 is arc-shaped, and an arc-shaped guide surface 235 is provided at the upper end of the thin rod 2344. The length of the push rod 234 extending out of the annular groove 233 can be adjusted by adjusting the depth of insertion of the thin rod 2344 into the thick rod 2342, so that the amount of absorption liquid flowing out of the liquid replenishing hole 53 can be adjusted. During adjustment, the locking stud 2346 is rotated to enable the inner end of the locking stud 2346 to be separated from the side wall of the thin rod 2344, then the thin rod 2344 is pulled up and down, the locking stud 2346 is screwed after adjustment, and the inner end of the locking stud 2346 is tightly pressed against the side wall of the thin rod 2344, so that the thin rod 2344 is locked and fixed.
It should be understood that in the present invention, each component that contacts the absorption liquid is preferably made of a corrosion-resistant material to ensure the use of the device.
Further, the second fluid infusion device 44 includes a second fluid reservoir 46 that is connected to the fluid inlet 25 formed in the tank 29 through a second fluid infusion line 45, and a fluid infusion pump 47 that is disposed on the second fluid infusion line 45. Fresh absorption liquid can be replenished in the tank 29 by a replenishing pump 47. The tank 29 is also provided with a waste liquid discharge port 26, and the waste liquid discharge port 26 is connected with a waste liquid storage tank 27 through a pipeline so as to realize the replacement of the absorption liquid.
Although embodiments of the present invention have been disclosed above, it is not limited to the use of the description and embodiments, it is well suited to various fields of use for the invention, and further modifications may be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the particular details without departing from the general concepts defined in the claims and the equivalents thereof.
Claims (3)
1. The exhaust gas desulfurization and denitrification treatment device is characterized by comprising an air inlet pipe, a dust removal device, an air inlet fan, an oxidation device, a desulfurization and denitrification tank, a driving device, a tail gas discharge pipe and an absorption liquid supplementing device, wherein the dust removal device, the air inlet fan and the oxidation device are sequentially arranged on the air inlet pipe along the air flow direction;
the desulfurization and denitrification tank comprises a tank body, a rotating shaft rotatably arranged in the tank body along the horizontal direction and at least one disc fixedly connected to the rotating shaft, wherein absorption liquid is contained in the tank body, and one part of the disc is immersed in the absorption liquid;
the driving device comprises a box body and a driving impeller which is rotatably arranged in the box body and is connected with the rotating shaft, and a first air outlet of the tank body is communicated with a second air inlet of the box body through a first air conveying pipeline so as to drive the driving impeller to rotate through air discharged by the tank body, thereby driving the disc coaxial with the driving impeller to rotate;
the tank body is cylindrical, and the central axis of the tank body coincides with the axis of the rotating shaft; the outer peripheral side wall of the tank body protrudes outwards to form annular containing cavities with the same number as the discs, and the discs are rotatably arranged in the annular containing cavities;
the disc comprises a disc body, disc-shaped supporting nets arranged on two side surfaces of the disc body, and a shaft hole formed in the middle of the disc body and through which the rotating shaft passes;
the diameters of the two disc-shaped supporting nets are larger than the diameter of the disc body, an annular groove is formed between the periphery of the two disc-shaped supporting nets and the peripheral side wall of the disc body, a plurality of ejector rods fixedly connected with the peripheral side wall of the disc body are arranged in an annular array in the annular groove, and the outer ends of the ejector rods extend out of the annular groove; the disc body is internally provided with a porous structure;
the outer end of the ejector rod is provided with an arc-shaped guide surface;
a fixed threaded hole for the ejector rod to insert is formed in the inner wall of the bottom of the annular groove, a threaded part matched with the fixed threaded hole is formed in the inner end of the ejector rod, and a convex column is arranged in the middle of the ejector rod;
the ejector rod is a telescopic rod and comprises a thick rod fixedly connected with the inner wall of the bottom of the annular groove, an inserting hole formed in the thick rod, a thin rod telescopically inserted in the inserting hole, a locking threaded hole formed in the side wall of the thick rod and penetrating through the inserting hole, and a locking stud inserted in the locking threaded hole, the inner end of the locking stud, which is used for being attached to the top of the thin rod, is arc-shaped, and the arc-shaped guide surface is arranged at the upper end of the thin rod;
the absorption liquid supplementing device comprises a first liquid supplementing device and a second liquid supplementing device, wherein the first liquid supplementing device comprises a first liquid storage tank for storing absorption liquid, an automatic liquid supplementing box connected with the first liquid storage tank through a first liquid supplementing pipeline and an automatic liquid discharging mechanism arranged in the automatic liquid supplementing box;
the automatic fluid infusion box is fixedly connected with the outer wall of the annular accommodating cavity, and a fluid infusion hole communicated with the annular accommodating cavity is formed in the bottom plate of the automatic fluid infusion box;
the automatic liquid discharging mechanism comprises a loop bar fixedly connected with a top plate of the automatic liquid supplementing box, an inner bar which is telescopically inserted into the loop bar from bottom to top, a sealing ball fixedly connected to the bottom end of the inner bar, and a pressure spring sleeved outside the inner bar and Zhou Juka and arranged between the loop bar and the sealing ball;
the diameter of the sealing ball is larger than the diameters of the inner rod and the fluid supplementing hole; and the lower end of the sealing ball is propped against the fluid supplementing hole without external force, so that the fluid supplementing hole is sealed.
2. The apparatus according to claim 1, wherein the second fluid infusion device comprises a second fluid reservoir communicated with a fluid inlet provided on the tank body through a second fluid infusion pipe, and a fluid infusion pump provided on the second fluid infusion pipe.
3. The flue gas desulfurization and denitrification treatment device according to claim 1, wherein the box body is further provided with a second air outlet, and the second air outlet is communicated with the tail gas discharge pipe through a second gas pipeline;
the tank body is also provided with a waste liquid discharge port, and the waste liquid discharge port is connected with a waste liquid storage tank through a pipeline.
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