CN220633711U - Device for treating acid gas tail gas - Google Patents
Device for treating acid gas tail gas Download PDFInfo
- Publication number
- CN220633711U CN220633711U CN202321931602.XU CN202321931602U CN220633711U CN 220633711 U CN220633711 U CN 220633711U CN 202321931602 U CN202321931602 U CN 202321931602U CN 220633711 U CN220633711 U CN 220633711U
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- Prior art keywords
- spray
- spray tower
- communicated
- water tank
- pipeline
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- 239000002253 acid Substances 0.000 title claims abstract description 39
- 239000007921 spray Substances 0.000 claims abstract description 168
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 239000003595 mist Substances 0.000 claims abstract description 24
- 239000000945 filler Substances 0.000 claims abstract description 21
- 239000007864 aqueous solution Substances 0.000 claims description 25
- 230000001502 supplementing effect Effects 0.000 claims description 10
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 7
- 239000013589 supplement Substances 0.000 claims description 3
- 238000004065 wastewater treatment Methods 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 46
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 30
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 4
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 4
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The utility model discloses a device for treating acid gas tail gas, which comprises an acid mist filter, a spray tower, a chimney, a fan, a spray water pump and a spray water tank, wherein the spray water tank is arranged on the spray tower; the spray tower comprises a spray tower main body, a demisting filter, a spray head, hollow ball fillers, an air inlet, a spray liquid outlet and an air outlet; the spray tower body is of a tower-shaped structure, the demisting filter is arranged at the upper part in the spray tower body, at least one layer of spray heads are arranged in the spray tower body below the demisting filter, and a layer of hollow ball filler is arranged below each layer of spray heads; the air inlet is positioned at the lower part of the spray tower body, the air outlet is positioned at the upper part of the spray tower body, and the spray liquid outlet is positioned at the lower part of the spray tower body; the gas outlet of the acid mist filter is communicated with the gas inlet of the spray tower through a pipeline, and the gas outlet of the spray tower is communicated with the chimney through a fan and a pipeline. The device can effectively reduce the content of sulfide in the tail gas of acid making, so that the tail gas reaches the emission standard of national environmental protection requirements.
Description
Technical Field
The utility model relates to a tail gas treatment device, in particular to a device for treating acid gas tail gas.
Background
The coking desulfurization waste liquid produced by coking enterprises is mostly prepared into sulfuric acid by adopting an acid preparation process, and the existing acid preparation process has low sulfuric acid mist absorption efficiency of a rod filter and an acid mist filter due to low sulfuric acid conversion absorption rate. As the national requirements on environmental protection are higher and the limit value of the emission is lower, the limit value of the concentration of the sulfuric acid tail gas emission, the reference emission and the unorganized emission limit value of the atmospheric pollutants at the boundary of enterprises must meet the control requirements in GB26132-2010 'emission standard of sulfuric acid industrial pollutants'.
Meanwhile, according to the requirements of the national ecological environment department, no. 31 bulletin of technical policy for preventing and treating sulfuric acid industrial pollution, the emission of sulfur dioxide and sulfuric acid mist in the tail gas of acid production should be controlled and reduced. The sulfuric acid industry can improve the conversion rate of a 'two-to-two-absorption' acid making device, and a high-efficiency fiber demister is adopted, and a sanitary tower is arranged behind the device to ensure that the tail gas is discharged up to the standard; enterprises which do not meet the requirements (emission standard and total control) should adopt the efficient desulfurization technology to carry out desulfurization treatment on the sulfuric acid tail gas, so that the tail gas reaches the standard. The tail gas treatment device must be added according to the popularization requirement of sulfuric acid industry technology by adopting one rotation and one suction.
In order to solve the current situation that the tail gas of the acid making process exceeds the standard, the existing acid gas tail gas treatment device needs to be improved so that the sulfuric acid tail gas reaches the control standard of GB26132-2010 'emission standard of sulfuric acid industrial pollutants'.
Disclosure of Invention
The utility model aims to provide a device for treating acid gas tail gas, which can effectively carry out desulfurization treatment.
In order to solve the technical problems, the utility model adopts the following technical scheme: the device comprises an acid mist filter, a spray tower, a chimney, a fan, a spray water pump and a spray water tank; the spray tower comprises a spray tower main body, a demisting filter, a spray head, hollow ball fillers, an air inlet, a spray liquid outlet and an air outlet; the spray tower body is of a tower-shaped structure, the demisting filter is arranged at the upper inner part of the spray tower body, at least one layer of spray heads is arranged in the spray tower body below the demisting filter, and a layer of hollow ball filler is arranged below each layer of spray heads; the air inlet is positioned at the lower part of the spray tower body, the air outlet is positioned at the upper part of the spray tower body, and the spray liquid outlet is positioned at the lower part of the spray tower body; the air outlet of the acid mist filter is communicated with the air inlet of the spray tower through a pipeline, and the air outlet of the spray tower is communicated with the chimney through a fan and a pipeline; the spray liquid outlet of the spray tower is communicated with the liquid inlet of the spray water tank through a pipeline, and the liquid outlet of the spray water tank is communicated with the spray heads of all layers through a spray water pump and a spray water pipe; the spray water tank is internally filled with alkaline aqueous solution.
Furthermore, the spray water tank is also communicated with a liquid supplementing pump through a pipeline, and the liquid supplementing pump is communicated with an alkaline aqueous solution configuration device through a pipeline; the spray water tank is also communicated with an outer drainage pump through a pipeline, and the outer drainage pump is communicated with a wastewater treatment device through a pipeline.
Further, a liquid level meter and a pH meter are arranged in the spray water tank; the liquid level meter and the pH meter control the liquid supplementing pump to supplement liquid, and the pH meter controls the outer drainage pump to drain.
Further, three layers of spray heads and three layers of hollow ball fillers are arranged in the spray tower main body and are respectively positioned at the inner upper part, the inner middle part and the inner lower part of the spray tower main body.
Further, the chimney is provided with SO 2 Concentration detector and H 2 SO 4 And a detector.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in: according to the utility model, the spray tower is arranged between the acid mist filter and the chimney, and the acidic gas and the acid mist in the tail gas are absorbed through spraying of the alkaline aqueous solution, so that the content of sulfide in the acid-making tail gas can be effectively reduced, and the tail gas can reach the national emission standard required by environmental protection. According to the utility model, the acid mist filtering device is arranged in the spray tower, so that the acid mist in the acid making tail gas is further filtered, and the content of the acid mist in the tail gas is reduced, thereby more effectively improving the treatment effect and ensuring that the discharged tail gas meets the discharge requirement.
Drawings
The utility model will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a schematic structural view of the spray tower according to the present utility model.
In the figure: an acid mist filter 1; a spray tower 2; a chimney 3; a fan 4; a shower pipe 5; a fluid supplementing pump 6; a spray water pump 7; a spray water tank 8; an outer drain pump 9; a defogging filter 10; an upper layer shower head 11; an upper layer hollow sphere filler 12; a middle layer shower nozzle 13; a middle layer hollow sphere filler 14; a lower layer shower head 15; a lower layer hollow sphere filler 16; an air inlet 17; a spray liquid outlet 18; a spray tower body 19; a viewing window 20; and an air outlet 21.
Detailed Description
The device for treating the acid gas tail gas comprises an acid mist filter 1, a spray tower 2, a chimney 3, a fan 4, a spray water pump 7 and a spray water tank 8, wherein the spray water pump 7 is arranged on the chimney; the spray tower 2 comprises a spray tower main body 19, a demisting filter 10, a spray head, hollow ball fillers, an air inlet 17, a spray liquid outlet 18 and an air outlet 21. The spray tower body 19 is of a hollow tower-shaped structure, the demisting filter 10 is arranged at the upper part in the spray tower body 19, at least one layer of spray heads is arranged in the spray tower body 19 below the demisting filter 10, and a layer of hollow ball filler is arranged below each layer of spray heads; as shown in fig. 2, it is preferable to provide three layers of spray heads and three layers of hollow ball fillers, namely an upper layer spray head 11, an upper layer hollow ball filler 12, a middle layer spray head 13, a middle layer hollow ball filler 14, a lower layer spray head 15 and a lower layer hollow ball filler 16; the upper layer spray head 11 and the upper layer hollow ball filler 12 are positioned at the inner upper part of the spray tower main body 19, the middle layer spray head 13 and the middle layer hollow ball filler 14 are positioned at the inner middle part of the spray tower main body 19, and the lower layer spray head 15 and the lower layer hollow ball filler 16 are positioned at the inner lower part of the spray tower main body 19; thus, the alkaline aqueous solution sprayed downwards by the spray head 15 can be fully contacted with the rising acid gas tail gas in the hollow ball packing layer, and a better mass transfer effect is realized. The air inlet 17 is positioned at the lower part of the spray tower body 19, the air outlet 21 is positioned at the upper part of the spray tower body 19, and the spray liquid outlet 18 is positioned at the lower part of the spray tower body 19. The air inlet of the acid mist filter 1 is communicated with an acid gas tail gas pipeline, the air outlet of the acid mist filter 1 is communicated with the air inlet 17 of the spray tower 2 through a pipeline, and the air outlet 21 of the spray tower 2 is communicated with the chimney 3 through a fan 4 and a pipeline; thus, under the power provided by the fan 4, the acid gas tail gas firstly enters the acid mist filter 1 to filter most of acid mist, then enters the spray tower main body 19 from the air inlet 17, rises in the spray tower 2 and fully contacts with the sprayed alkaline aqueous solution, and the alkaline substance of the alkaline aqueous solution reacts and neutralizes sulfuric acid mist and sulfur dioxide gas to become sulfate-containing and sulfite-containing solution to be discharged. The spray liquid outlet 18 of the spray tower 2 is communicated with the liquid inlet of the spray water tank 8 through a pipeline, and the liquid outlet of the spray water tank 8 is communicated with spray heads of all layers through the spray water pump 7 and the spray water pipe 5; the spray water tank 8 is filled with an alkaline aqueous solution, preferably an aqueous solution containing NaOH; the sulfate and sulfite-containing solution enters the spray water tank 8 through the spray liquid outlet 18, and then is sent into a spray head to spray through the spray water pump 7 and the spray water pipe 5, so that the alkaline aqueous solution can be recycled.
As shown in fig. 1, in the device for treating acid gas tail gas, the spray water tank 8 is also communicated with the liquid supplementing pump 6 through a pipeline, and the liquid supplementing pump 6 is communicated with the alkaline aqueous solution configuration device through a pipeline; the spray water tank 8 is also communicated with an outer drainage pump 9 through a pipeline, and the outer drainage pump 9 is communicated with a wastewater treatment device through a pipeline; a liquid level meter and a pH meter are arranged in the spray water tank; because the alkaline aqueous solution of the spray water tank is continuously neutralized with acidic substances in the spray tower, the pH value of the alkaline aqueous solution is continuously reduced, and the effect of treating the acidic substances cannot be achieved well, and at the moment, the neutralized liquid in the spray water tank is required to be sent to supplement new alkaline liquid to enter the system; thus, when the pH meter detects that the pH of the alkaline aqueous solution is too low, the outer drainage pump 9 is controlled to externally drain the alkaline aqueous solution in the spray water tank 8; when the pH meter detects that the pH of the alkaline aqueous solution is too low or the liquid level meter detects that the liquid level of the alkaline aqueous solution is too low, the liquid replenishing pump 6 is controlled to replenish the alkaline aqueous solution into the spray water tank 8.
The device for treating the acid gas tail gas is provided with a spray water pump 7 which plays a role of core operation equipment in the device, and provides a power source for spraying alkaline aqueous solution, so that the alkaline aqueous solution is continuously circulated between a spray water tank 8 and a spray tower 2. The spray tower body 19 is provided with a plurality of observation windows 20 for observing the spray conditions in the tower.
The chimney of the device for treating the acid gas tail gas is provided with SO 2 Concentration detector and H 2 SO 4 And the detector is used for monitoring whether the discharged gas reaches the standard or not, and the gas reaching the standard can be discharged.
This a device for handling sour gas tail gas is in the use: the alkaline aqueous solution is sent to each layer of spray heads in the spray tower 2 through a spray water pump 7, covers the whole cross section of the tower body, and is fully contacted with the reverse convection of the acid gas tail gas from bottom to top to finish the mass transfer process, thereby achieving the purpose of purifying the waste gas. The waste gas in the spray tower 2 is fully contacted with the alkaline aqueous solution, so that sulfuric acid mist and sulfur dioxide gas are reacted and neutralized to become sulfate-containing and sulfite-containing solution to be discharged. The trace water mist and sulfuric acid mist and sulfur dioxide pass through a demisting filter 10 at the top of the spray tower 2 to ensure the treatment efficiency.
Because there is the cyclic utilization of spray column waste water in spray water tank 8, the sulphate and the sulfite that produce can be more and more, and TDS can be higher and higher to can produce crystallization in pipeline inside and on the packing, can influence normal use and treatment effeciency. So when TDS is larger than or equal to 15000mg/L (or periodically), the circulating water is discharged to the original concentrated water tank for treatment through the outer drainage pump 9, and the alkaline aqueous solution is supplemented by the spray water tank 8 through the supplementing pump 6.
As a specific example of the present apparatus for treating sour gas tail gas, the specifications of each apparatus are as follows:
spray tower 2 specification phi 2000 x 8800mm, air volume is treated: 6000m 3 /h; the tower wall is made of glass fiber reinforced plastic plates with the thickness of 10mm, the tower bottom is made of glass fiber reinforced plastic plates with the thickness of 12mm, and an observation window 20 is designed to observe the spraying condition of spraying liquid in the tower; and the upper part and the lower part are provided with inspection manholes. The spray tower 2 is internally provided with polyhedral hollow ball fillers, adopts a branch pipe type spray device, and is provided with a defogging filter 10 made of polyethylene net at the top.
Spray water pump 7 flow: 50t/h; the lift: 38m; power: 15kw; quantity: 2 (one for each). Considering that the liquid medium is corrosive, the pump body flow-through part is made of fluorine lining, and the service life of the pump is prolonged. The mechanical seal adopts double-end-face sealing to ensure that internal media do not leak. The alkaline aqueous solution is sent to each spray device in the spray tower 2 through a spray water pump 7, covers the whole tower section, and is fully contacted with the reverse convection of the waste gas from bottom to top, so as to complete the mass transfer process and achieve the purpose of purifying the waste gas.
Spray water tank 8 specification: 3000X 2000mm; effective height: 1700mm; effective volume: 15.3 m. Considering that the liquid medium is corrosive, the spray water tank 8 is made of a 15mm thick tetrafluoro plate, so that the corrosion resistance of the equipment is ensured, and certain strength is realized.
Flow rate of the outer drain pump 9: 15t/h; the lift: 21m power: 4kw; quantity: 2 (one is used for one) consider that the liquid medium has corrosiveness, and the pump body flow-through part is made of fluorine lining, so that the service life of the pump is prolonged. The mechanical seal adopts double-end-face sealing to ensure that internal media do not leak.
Fan 4 flow: 6000m 3 /h; wind pressure: 5KPa; motor power: 15kw; quantity: 2 (one for each). The fan 4 is discharged into a chimney and then discharged to the atmosphere, so that the national environmental protection requirement can be met.
Claims (5)
1. A device for treating sour gas tail gas, characterized in that: the device comprises an acid mist filter (1), a spray tower (2), a chimney (3), a fan (4), a spray water pump (7) and a spray water tank (8); the spray tower (2) comprises a spray tower main body (19), a demisting filter (10), a spray head, hollow ball fillers, an air inlet (17), a spray liquid outlet (18) and an air outlet (21); the spray tower body (19) is of a tower-shaped structure, the demisting filter (10) is arranged at the upper part in the spray tower body (19), at least one layer of spray heads is arranged in the spray tower body (19) below the demisting filter (10), and a layer of hollow ball filler is arranged below each layer of spray heads; the air inlet (17) is positioned at the lower part of the spray tower main body (19), the air outlet (21) is positioned at the upper part of the spray tower main body (19), and the spray liquid outlet (18) is positioned at the lower part of the spray tower main body (19); the air outlet of the acid mist filter (1) is communicated with the air inlet (17) of the spray tower (2) through a pipeline, and the air outlet (21) of the spray tower (2) is communicated with the chimney (3) through a fan (4) and a pipeline; the spray liquid outlet (18) of the spray tower (2) is communicated with the liquid inlet of the spray water tank (8) through a pipeline, and the liquid outlet of the spray water tank (8) is communicated with the spray heads of all layers through the spray water pump (7) and the spray water pipe (5); the spray water tank (8) is internally filled with alkaline aqueous solution.
2. An apparatus for treating sour gas tail gas as claimed in claim 1, wherein: the spray water tank (8) is also communicated with a liquid supplementing pump (6) through a pipeline, and the liquid supplementing pump (6) is communicated with an alkaline aqueous solution configuration device through a pipeline; the spray water tank (8) is also communicated with an outer drainage pump (9) through a pipeline, and the outer drainage pump (9) is communicated with the wastewater treatment device through a pipeline.
3. An apparatus for treating sour gas tail gas as claimed in claim 2, wherein: a liquid level meter and a pH meter are arranged in the spray water tank (8); the liquid level meter and the pH meter control the liquid supplementing pump (6) to supplement liquid, and the pH meter controls the outer drainage pump (9) to drain.
4. An apparatus for treating sour gas tail gas as claimed in claim 1, wherein: three layers of spray heads and three layers of hollow ball fillers are arranged in the spray tower main body (19) and are respectively positioned at the inner upper part, the inner middle part and the inner lower part of the spray tower main body (19).
5. An apparatus for treating sour gas exhaust according to any one of claims 1 to 4, wherein: the chimney (3) is provided with SO 2 Concentration detector and H 2 SO 4 And a detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321931602.XU CN220633711U (en) | 2023-07-21 | 2023-07-21 | Device for treating acid gas tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321931602.XU CN220633711U (en) | 2023-07-21 | 2023-07-21 | Device for treating acid gas tail gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220633711U true CN220633711U (en) | 2024-03-22 |
Family
ID=90270421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321931602.XU Active CN220633711U (en) | 2023-07-21 | 2023-07-21 | Device for treating acid gas tail gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220633711U (en) |
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2023
- 2023-07-21 CN CN202321931602.XU patent/CN220633711U/en active Active
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