CN220513825U - Cooling falling film absorption tower for recycling waste gas - Google Patents
Cooling falling film absorption tower for recycling waste gas Download PDFInfo
- Publication number
- CN220513825U CN220513825U CN202322028076.2U CN202322028076U CN220513825U CN 220513825 U CN220513825 U CN 220513825U CN 202322028076 U CN202322028076 U CN 202322028076U CN 220513825 U CN220513825 U CN 220513825U
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- China
- Prior art keywords
- spray
- cooling
- bin
- absorption
- waste gas
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 101
- 238000001816 cooling Methods 0.000 title claims abstract description 73
- 239000002912 waste gas Substances 0.000 title claims abstract description 51
- 239000011552 falling film Substances 0.000 title claims abstract description 25
- 238000004064 recycling Methods 0.000 title claims abstract description 19
- 239000007921 spray Substances 0.000 claims abstract description 110
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000007788 liquid Substances 0.000 claims abstract description 61
- 238000009826 distribution Methods 0.000 claims abstract description 48
- 238000005507 spraying Methods 0.000 claims abstract description 41
- 238000003860 storage Methods 0.000 claims abstract description 19
- 239000010408 film Substances 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000003595 mist Substances 0.000 abstract description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 24
- 238000000034 method Methods 0.000 description 16
- 229910021529 ammonia Inorganic materials 0.000 description 9
- 239000000498 cooling water Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000006096 absorbing agent Substances 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The utility model discloses a cooling falling film absorption tower for recycling waste gas, which comprises a spray bin, a water distribution bin, a cooling absorption bin and a spray liquid storage bin which are sequentially connected from top to bottom; a spray header pipe is arranged on the shell wall of the spray bin, and a spray branch pipe is arranged in the spray bin; the central part of the cooling absorption pipe in the cooling absorption bin is penetrated with a capillary, the top end of the capillary is positioned at two sides of the pipe wall of the spraying branched pipe, and the bottom end of the capillary is arranged on a supporting frame in the spraying liquid storage bin; spraying holes are formed in the spraying branch pipes, and spraying liquid is sprayed onto the inner wall and the outer wall of the capillary tube through the spraying holes. The utility model forms three water film layers on the inner wall and the outer wall of the capillary tube and the inner wall of the cooling absorption tube, and the capillary tube is provided with the through holes in a spiral mode, and when the gas and the liquid reversely move under the action of the through holes, part of water in the water film layer forms water mist, so that the absorption area of the water film layer is enlarged, the absorption area of the water mist is increased, and the absorption efficiency is improved.
Description
Technical Field
The utility model relates to the field of waste gas treatment equipment, in particular to a cooling falling film absorption tower for recycling waste gas.
Background
The waste gas produced by industrial production is generally referred to as toxic and harmful waste gas. The toxic and harmful waste gas is harmful to human health, the toxic and harmful waste gas absorption treatment is a difficult problem in the environmental protection industry, and the research and development of waste gas absorption treatment equipment is a main subject of ecological environment protection.
In the prior art, the treatment equipment for industrial waste gas mainly comprises a falling film absorber and a waste gas absorption treatment tower. The waste gas absorbed and treated by the falling film absorber is only limited to the waste gas treatment generated by the closed equipment in the production process, and the limitation of the application range is large. The waste gas absorption treatment tower is suitable for treating waste gas of a process line and waste gas of a production environment, and the application range is more flexible. However, the method for treating the waste gas by using the waste gas absorption treatment tower generally adopts chemical adding neutralization reaction and then spray absorption, secondary pollutants, namely absorption waste liquid, are usually generated in the process, the concentration of the absorption waste liquid is low, waste water treatment is required to be carried out, the purpose of pollution treatment can be achieved, and the whole process of waste gas treatment is long, the difficulty is high and the economical efficiency is poor.
For example, the ammonia waste gas generated in the alkaline production line of circuit board enterprises in the electronic industry, and the equipment and the method used in the absorption treatment process have the following problems.
In the treatment process of the polyhedral spherical filler absorption tower, the spray liquid distribution is poor, the superposition state of the polyhedral spherical filler is uniformly distributed, but the probability of the short circuit phenomenon of the waste gas is high under the action of a draught fan, and according to the current situation research, the filler layer plays a role of 30 percent, so that the polyhedral spherical filler absorption tower is required to be subjected to serial treatment of multiple towers in the waste gas treatment process, and the facility investment is large.
The ammonia absorption treatment generally enables acid liquor to be tower leaching liquor, and the ammonia and acid neutralization reaction treatment is performed, but the absorption recovery liquor is low in concentration and can only be used as ammonia salt wastewater for sewage treatment, the ammonia salt wastewater treatment method adopts oxidation reaction for denitrification, so that the risk of dangerous chemical safety management of an oxidant is brought, the oxidation reaction denitrification process is a high-risk process, the safety risk of chlorine waste gas generated in the reaction process is higher, and the difficulty of treating secondary pollutants of the chlorine waste gas is higher.
Adding acid liquor to absorb and treat ammonia gas, changing the property of ammonia gas to generate ammonia salt, and adding oxidant to treat ammonia salt wastewater to generate harmless N 2 The gas, residual secondary contaminants (NaCl), still pollute the water resource.
Disclosure of Invention
The utility model solves the defects existing in the waste gas treatment equipment in the prior art when the waste gas is treated by providing the cooling falling film absorption tower for recycling the waste gas.
In order to solve the technical problems, the utility model provides a cooling falling film absorption tower for recycling waste gas, which comprises a spraying bin, a cooling absorption bin and a spraying liquid storage bin which are sequentially connected from top to bottom; the shell wall of the spray bin is provided with a spray header pipe, a spray branch pipe is arranged in the spray bin, and the spray branch pipe is communicated with the spray header pipe; a capillary tube is arranged in the cooling absorption tube in the cooling absorption bin in a penetrating manner, the top end of the capillary tube is positioned at two sides of the tube wall of the spraying branched tube, and the bottom end of the capillary tube is arranged on a supporting frame in the spraying liquid storage bin; the spray branch pipes are regularly provided with spray holes, and spray liquid is sprayed onto the inner wall and the outer wall of the capillary tube through the spray holes, so that the inner wall and the outer wall of the capillary tube form a double-layer water film layer.
In a preferred embodiment of the present utility model, the spray holes include a first spray hole and a second spray hole, wherein the first spray hole is located at middle portions of two sides of the spray branch pipe, and the second spray hole is located at upper portions of two sides of the spray branch pipe.
In a preferred embodiment of the present utility model, the included angle between the second spraying hole and the horizontal plane is 45 ° to 60 °.
In a preferred embodiment of the present utility model, the capillary tube penetrates from the central part of the cooling absorption tube, and the diameter of the capillary tube is less than or equal to 2/5 of the inner diameter of the cooling absorption tube.
In a preferred embodiment of the utility model, the capillary tube is provided with a plurality of through holes, the through holes are arranged on the capillary tube in a spiral mode, and the aperture of the through holes is 5/6-1 times of the diameter of the capillary tube.
In a preferred embodiment of the present utility model, the cooling falling film absorption tower further includes a water distribution bin, the water distribution bin is disposed between the spray bin and the cooling absorption bin, a horizontal water distribution plate and a water distribution pipe section are disposed in the water distribution bin, a through hole corresponding to the cooling absorption pipe is formed on the horizontal water distribution plate, and the water distribution pipe section is mounted on the through hole of the horizontal water distribution plate; the capillary tube penetrates through the water distribution pipe section, and the spray liquid flows onto the inner wall of the cooling absorption pipe through the upper tooth opening of the water distribution pipe section.
In a preferred embodiment of the present utility model, the inner diameter of the water distribution pipe section is equal to or larger than the inner diameter of the cooling absorption pipe.
In a preferred embodiment of the utility model, a spray liquid outlet is arranged on one side of the spray liquid storage bin, a spray liquid input port is arranged on the spray header pipe, and the spray liquid outlet is communicated with the spray liquid input port through a pipeline with a circulating pump.
In a preferred embodiment of the utility model, a side wall of the spray liquid storage bin is connected with an exhaust gas inlet.
In a preferred embodiment of the present utility model, the joint of the exhaust gas inlet is inclined upward and forms an angle of 30 ° to 45 ° with the horizontal plane.
The beneficial effects of the utility model are as follows: according to the cooling falling film absorption tower for recycling waste gas, through the structural design in the spraying bin and the cooling absorption bin, water film layers are formed on the inner wall surface and the outer wall surface of the capillary tube, so that the absorption area is enlarged in a multiplied manner, the absorption efficiency is improved, and the absorption effect with half effort is achieved.
Drawings
FIG. 1 is a schematic perspective view of a preferred embodiment of a cooling falling film absorber for recycling waste gas according to the present utility model showing only a portion of the capillaries;
FIG. 2 is a schematic diagram of the mounting structure of the cooling absorber tube, capillary tube and shower nozzle shown;
FIG. 3 is an enlarged schematic view of the rectangular frame portion of FIG. 2;
FIG. 4 is a schematic cross-sectional top view of the spray booth shown;
the components in the drawings are marked as follows:
10. a tower top cover;
20. the spray bin, 21, a spray header, 22, a spray liquid input port, 23, a fixed frame plate and 24, a spray branch pipe;
30. a water distribution bin, a horizontal water distribution plate, a water distribution pipe section and a water distribution pipe section;
40. a cooling absorption bin 41, a cooling absorption pipe 42, an orifice plate 43, a cooling water inlet 44 and a cooling water outlet;
50. the spray liquid storage bin, 51, the support frame, 52, the waste gas inlet, 53, the spray liquid outlet;
60. capillary tube, 61, hole, 70, induced draft fan, 80, circulating pump.
Detailed Description
The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.
Referring to fig. 1-4, an embodiment of the present utility model includes:
example 1
The utility model discloses a cooling falling film absorption tower for recycling waste gas, which comprises a tower top cover 10, a spray bin 20, a water distribution bin 30, a cooling absorption bin 40 and a spray liquid storage bin 50 which are sequentially connected from top to bottom. The tower top cover 10 is in a cone structure, the top end of the tower top cover is provided with a gas outlet, and the bottom end of the tower top cover is in flange connection with the spraying bin 20. The spray bin 20 is sequentially connected with the water distribution bin 30, the cooling absorption bin 40 and the spray liquid storage bin 50 in a flange manner.
Specifically, a plurality of vertically distributed cooling absorbing pipes 41 are arranged in the cooling absorbing bin 40, and the top end and the bottom end of the cooling absorbing bin 40 are provided with pore plates 42. The two ends of the cooling absorbing pipe 41 are fixed by the orifice plate 42. A groined support frame 51 is arranged in the spray liquid storage bin 50. A capillary tube 60 is installed in the cooling absorption tube 41. Specifically, the capillary tube 60 penetrates through the middle part of the cooling absorption tube 41, the top end of the capillary tube penetrates through the water distribution bin 30 and extends into the spraying bin 20, and the bottom end of the capillary tube is mounted on the support frame 51 in the spraying liquid storage bin 50.
The upper tray of the shell wall of the spray bin 20 is provided with a spray header 21, and the spray header 21 is provided with a spray liquid input port 22. The inside of spray bin 20 is installed fixed frame plate 23, fixed frame plate 23 is last to be provided with a plurality of spraying in equidistant 24, fixed frame plate 23 is located the both sides of spraying in 24 have capillary 60 fixed orifices, the top of capillary 60 runs through the fixed orifices is fixed in the pipe wall both sides of spraying in 24.
Both ends of the spray branch pipe 24 are connected with the inner wall surface of the spray header pipe 21, and the spray liquid in the spray header pipe 21 firstly enters the spray branch pipe 24 and then is sprayed out. The middle parts of two sides of the spraying branched pipe 24 are provided with first spraying holes, namely, the first spraying holes are spraying holes in the horizontal direction, so that horizontal spraying of spraying liquid is realized, and part of spraying liquid can be sprayed on the outer wall surface of the capillary 60. The upper parts of the two sides of the spray branch pipe 24 are provided with second spray holes, the included angle between the second spray holes and the horizontal direction is 45-60 degrees, so that inclined spray of spray liquid is realized, and a part of spray liquid can be sprayed on the inner wall surface of the capillary tube 60. Through the design of the first spraying holes and the second spraying holes on the spraying branched pipe 24, a part of spraying liquid forms a double-layer water film layer on the inner wall and the outer wall of the capillary tube 60, so that the absorption efficiency of waste gas is improved.
Further, the diameter of the capillary tube is less than or equal to 2/5 of the diameter of the cooling absorption tube 41, a plurality of through holes 61 are spirally distributed from bottom to top on the tube wall of the capillary tube 60, and the aperture of the through holes 61 is 5/6-1 times of the aperture of the capillary tube 60. Through the design of the aperture of the capillary tube 60 and the aperture design of the through hole formed in the capillary tube, the waste gas meets the spray liquid flowing from top to bottom in the capillary tube 60 in the process of flowing upwards from the bottom of the cooling falling film absorption tower, so that water film layers on the inner wall and the outer wall of the capillary tube form water mist in the area between the capillary tube and the cooling absorption pipe 41, the film layer absorption operation is realized, the water mist absorption effect is realized, and the waste gas absorption effect is further enhanced.
A water distribution assembly is arranged in the water distribution bin 30 and comprises a horizontal water distribution plate 31 and a water distribution pipe section 32. Wherein, the horizontal water distribution plate 31 is provided with a through hole, and the water distribution pipe section 32 is arranged around the through hole of the horizontal water distribution plate 31. The top end of the water distribution pipe section 32 is provided with a zigzag overflow port. The inner diameter of the water distribution pipe section 32 is equal to or larger than the inner diameter of the cooling absorption pipe 41. Part of the spray liquid sprayed from the spray bin 20 is collected on the horizontal water distribution plate 31 of the water distribution bin 30, and when the spray liquid is enough, the spray liquid overflows downwards from the zigzag overflow port of the water distribution pipe section 32 to the inner wall surface of the cooling absorption pipe 41, namely, a water film layer is formed on the inner wall surface of the cooling absorption pipe 41, so that the waste gas absorption effect is further enhanced.
Through the design of the spray branch pipes and the water distribution component, 3 water film layers are formed on each cooling absorption pipe 41 and the capillary tube 60 therein, so that the absorption area is doubled, the absorption efficiency is improved, and the absorption effect with half effort is achieved.
In addition, the cooling absorbing bin 40 has a cooling water inlet 43 at one side of the bottom and a cooling water outlet 44 at the other side of the top. The cooling water source enters the cooling absorption bin 40 from the cooling water inlet 43, flows out from the cooling water outlet 44 upwards, and continuously cools the cooling water source, so that the cooling absorption effect on the waste gas is improved.
And an exhaust gas inlet 52 is arranged on one side wall of the spray liquid storage bin 50 and above the supporting frame 51, and the exhaust gas inlet 52 is inclined upwards and forms an included angle of 30-45 degrees with the horizontal direction. The waste gas inlet 52 is connected with an air outlet of the induced draft fan 70, so that waste gas to be treated enters from the bottom of the cooling absorption bin 40, flows upwards through the cooling absorption bin 50, the water distribution bin 30 and the spraying bin 20 in sequence, and finally is discharged through a gas outlet at the top of the tower top cover 10 to form natural emptying from bottom to top.
In addition, a spray liquid outlet 53 is formed on one side of the bottom of the spray liquid storage bin 50, the spray liquid outlet 53 is communicated with the spray liquid inlet 22 through a pipeline with a circulating pump 80, so that the absorption liquid stored in the spray liquid storage bin 50 enters the spray header 21 again for circulating spraying under the action of the circulating pump, and in the circulating spraying process, the absorption liquid reaches the industrial concentration requirement, and can be recycled, thereby thoroughly solving the pollution problem.
The working principle or working process of the utility model will be described below by taking ammonia absorption as an example:
ammonia to be treated is conveyed to the bottom of the cooling falling film absorption tower through an induced draft fan 70, enters from the bottom of the cooling absorption bin 40, and flows upwards through the cooling absorption bin 50, the water distribution bin 30 and the spraying bin 20 in sequence; in the process of upward flowing of ammonia, clear water for absorbing the ammonia is conveyed into the spray header 21 through the spray liquid input port 22 and is spray liquid, the spray liquid enters the spray branch pipe 24 and is sprayed out through the first spray hole and the second spray hole, one part forms a double-layer water film layer on the inner wall and the outer wall of the capillary tube 60, the other part is converged in the water distribution bin, overflows downwards through the water distribution component and enters the cooling absorption bin 40, and forms a water film layer on the inner wall surface of the cooling absorption pipe 41, ammonia waste gas is cooled and dissolved in the spray liquid in the cooling absorption bin, the residual gas continues to flow upwards and is gradually absorbed, and finally the gas which cannot be absorbed is discharged from the top of the tower top cover to form natural emptying from bottom to top, so that the effective absorption and purification of the ammonia waste gas are realized; in addition, the absorption liquid collected in the absorption spray liquid storage bin 50 is circulated and enters the spray header 21 for circulation spraying under the circulation action of the circulation pump 80, and in the circulation spraying process, the absorption liquid reaches the concentration requirement of industrial grade ammonia water, so that the absorption liquid can be recycled, and the pollution problem is thoroughly solved.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.
Claims (10)
1. The cooling falling film absorption tower for recycling waste gas is characterized by comprising a spraying bin, a cooling absorption bin and a spraying liquid storage bin which are sequentially connected from top to bottom; the shell wall of the spray bin is provided with a spray header pipe, a spray branch pipe is arranged in the spray bin, and the spray branch pipe is communicated with the spray header pipe; a capillary tube is arranged in the cooling absorption tube in the cooling absorption bin in a penetrating manner, the top end of the capillary tube is positioned at two sides of the tube wall of the spraying branched tube, and the bottom end of the capillary tube is arranged on a supporting frame in the spraying liquid storage bin; the spray branch pipes are regularly provided with spray holes, and spray liquid is sprayed onto the inner wall and the outer wall of the capillary tube through the spray holes, so that the inner wall and the outer wall of the capillary tube form a double-layer water film layer.
2. The exhaust gas recycling cooling falling film absorption tower according to claim 1, wherein the spray holes comprise a first spray hole and a second spray hole, wherein the first spray hole is positioned at the middle part of two sides of the spray branch pipe, and the second spray hole is positioned at the upper part of two sides of the spray branch pipe.
3. The exhaust gas recycling cooling falling film absorption tower according to claim 2, wherein an included angle between the second spraying holes and a horizontal plane is 45-60 degrees.
4. The cooling falling film absorption tower for recycling waste gas according to claim 1, wherein the capillary tube penetrates through the center of the cooling absorption tube, and the diameter of the capillary tube is less than or equal to 2/5 of the inner diameter of the cooling absorption tube.
5. The cooling falling film absorption tower for recycling waste gas according to claim 4, wherein a plurality of through holes are formed in the capillary tube, the through holes are arranged on the capillary tube in a spiral mode, and the aperture of each through hole is 5/6-1 times of the diameter of the capillary tube.
6. The cooling falling film absorption tower for recycling waste gas according to claim 5, wherein the cooling falling film absorption tower further comprises a water distribution bin, the water distribution bin is arranged between the spraying bin and the cooling absorption bin, a horizontal water distribution plate and a water distribution pipe section are arranged in the water distribution bin, a through hole corresponding to the cooling absorption pipe is formed in the horizontal water distribution plate, and the water distribution pipe section is arranged on the through hole of the horizontal water distribution plate; the capillary tube penetrates through the water distribution pipe section, and the spray liquid flows onto the inner wall of the cooling absorption pipe through the upper tooth opening of the water distribution pipe section.
7. The cooling falling film absorption tower for recycling waste gas according to claim 6, wherein the inner diameter of the water distribution pipe section is larger than or equal to the inner diameter of the cooling absorption pipe.
8. The cooling falling film absorption tower for recycling waste gas according to claim 1, wherein a spray liquid outlet is formed in one side of the spray liquid storage bin, a spray liquid input port is formed in the spray header pipe, and the spray liquid outlet is communicated with the spray liquid input port through a pipeline with a circulating pump.
9. The cooling falling film absorption tower for recycling waste gas according to claim 1 or 8, wherein a waste gas inlet is connected to one side wall of the spray liquid storage bin.
10. The cooling falling film absorption tower for recycling waste gas according to claim 9, wherein the joint of the waste gas inlet is inclined upwards and forms an included angle of 30-45 degrees with the horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322028076.2U CN220513825U (en) | 2023-07-31 | 2023-07-31 | Cooling falling film absorption tower for recycling waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322028076.2U CN220513825U (en) | 2023-07-31 | 2023-07-31 | Cooling falling film absorption tower for recycling waste gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220513825U true CN220513825U (en) | 2024-02-23 |
Family
ID=89924336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322028076.2U Active CN220513825U (en) | 2023-07-31 | 2023-07-31 | Cooling falling film absorption tower for recycling waste gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220513825U (en) |
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2023
- 2023-07-31 CN CN202322028076.2U patent/CN220513825U/en active Active
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