CN113274864A - Ultralow discharge system is administered to urea production tail gas ammonia - Google Patents

Ultralow discharge system is administered to urea production tail gas ammonia Download PDF

Info

Publication number
CN113274864A
CN113274864A CN202110653659.7A CN202110653659A CN113274864A CN 113274864 A CN113274864 A CN 113274864A CN 202110653659 A CN202110653659 A CN 202110653659A CN 113274864 A CN113274864 A CN 113274864A
Authority
CN
China
Prior art keywords
tail gas
ammonia
exhaust funnel
absorption tower
pressure absorption
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110653659.7A
Other languages
Chinese (zh)
Inventor
刘金成
张长秋
杨万成
崔佳宏
董樵
谷如江
陶世成
许建锋
赵艳平
王洪忠
李春启
李宪章
刘慧琴
牛肖锋
王宏葛
丰帅
翟涛
徐鹏
王晓玲
梁淑芳
吴海良
赵素峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hebei Zhengyuan Chemical Engineering Co ltd
Original Assignee
Hebei Zhengyuan Chemical Engineering Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hebei Zhengyuan Chemical Engineering Co ltd filed Critical Hebei Zhengyuan Chemical Engineering Co ltd
Priority to CN202110653659.7A priority Critical patent/CN113274864A/en
Publication of CN113274864A publication Critical patent/CN113274864A/en
Pending legal-status Critical Current

Links

Images

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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/58—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75—Multi-step processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/76—Gas phase processes, e.g. by using aerosols

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention discloses an ammonia treatment ultralow emission system for urea production tail gas, belonging to the technical field of urea production tail gas treatment, and comprising a tail gas emission device, an exhaust funnel for collecting tail gas and uniformly discharging, a carbon dioxide compressor and a spray cooling device; the gas outlet end of the tail gas discharge device is connected with the gas inlet end of the exhaust funnel; an upper-layer filling section and a lower-layer filling section are arranged in the exhaust funnel from top to bottom. According to the invention, carbon dioxide is introduced into the bottoms of the low-pressure absorption tower, the normal-pressure absorption tower and the exhaust funnel, so that the carbon dioxide reacts with ammonia in the tail gas to fix the ammonia, and thus the content of ammonia at the outlet of the exhaust funnel is greatly reduced; and simultaneously, the device is matched with the washing process of a filler section arranged in the exhaust funnel, so that the treatment effect of ammonia in tail gas is further ensured.

Description

Ultralow discharge system is administered to urea production tail gas ammonia
Technical Field
The invention relates to the technical field of urea production tail gas treatment, in particular to an ammonia treatment ultralow emission system for urea production tail gas.
Background
Along with the increasing requirements of the national environment protection, the emission index of the tail gas in the urea production has higher requirements, and in particular, the technical guidelines formulated by emergency emission reduction measures in key industries in heavily polluted weather and issued or formulated by organizations of the department of ecological environment in 2020 and the emission standards of atmospheric pollutants in chemical fertilizer industry (solicited opinions) have higher requirements on the environmental emission indexes of various industries. The documents require the enterprises in the key areas to implement special emission limits of atmospheric pollutants and other pollution control requirements, in which the ammonia content in the exhaust gases from urea production is indicated to be less than 30 ppm.
However, the tail gas emission index of the current domestic urea production process is not effectively treated due to the reasons of technical development and the like, so that the ammonia content in the tail gas emission index can not reach the standard far away. The tail gas discharged from the exhaust funnel after the ammonia content exceeds the standard has strong ammonia smell, thereby not only polluting the environment, but also causing the loss of ammonia.
Therefore, it is urgent to develop a method for effectively reducing the ammonia content in the urea tail gas.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an ultralow emission system for treating ammonia in tail gas from urea production, wherein carbon dioxide is introduced into the bottoms of a low-pressure absorption tower, a normal-pressure absorption tower and an exhaust funnel, so that the carbon dioxide reacts with ammonia in the tail gas to form ammonium bicarbonate, ammonium carbamate and other compounds, and the ammonia is fixed, thereby greatly reducing the content of ammonia at the outlet of the exhaust funnel; and simultaneously, the device is matched with the washing process of a newly added filler section in the exhaust funnel, so that the treatment effect of ammonia in tail gas is further ensured.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
an ultra-low emission system for treating ammonia in urea production tail gas comprises a tail gas emission device, an exhaust funnel for collecting tail gas and uniformly discharging, a carbon dioxide compressor and a spray cooling device; the gas outlet end of the tail gas discharge device is connected with the gas inlet end of the exhaust funnel; an upper-layer filling section and a lower-layer filling section are arranged in the exhaust funnel from top to bottom.
The technical scheme of the invention is further improved as follows: the tail gas discharge device comprises a low-pressure absorption tower, a normal-pressure absorption tower, an ammonia water tank, a urine tank and an accident tank, wherein the liquid inlet end of the normal-pressure absorption tower is connected with the liquid outlet end of the low-pressure absorption tower; the position of the tail gas of the low-pressure absorption tower entering the exhaust cylinder is arranged below the liquid level of the washing liquid at the bottom of the exhaust cylinder.
The technical scheme of the invention is further improved as follows: and introducing carbon dioxide from a carbon dioxide compressor below the liquid levels at the bottoms of the low-pressure absorption tower, the normal-pressure absorption tower and the exhaust funnel to improve the absorption effect of ammonia.
The technical scheme of the invention is further improved as follows: the spraying cooling device comprises a first spraying device, a second spraying device, a circulating pump and a cooler; desalted water is sprayed on the upper-layer filling section through a first spraying device; and the washing liquid at the bottom of the exhaust cylinder is pumped to a cooler through a circulating pump to be cooled, and the cooled washing liquid is sprayed above the lower-layer filler section through a second spraying device.
The technical scheme of the invention is further improved as follows: and a part of ammonia-containing washing liquid discharged from the circulating pump is recycled in the working sections of ammonia distillation, deep hydrolysis or flue gas desulfurization.
The technical scheme of the invention is further improved as follows: and tail gas of the normal pressure absorption tower, the ammonia water tank, the urine tank and the accident tank enters a space between the lower end of the lower-layer filler section in the exhaust funnel and the liquid level of the washing liquid.
The technical scheme of the invention is further improved as follows: and the outlet pressure, the temperature and the flow of the carbon dioxide provided by the carbon dioxide compressor are set according to the actual condition of the production device.
The technical scheme of the invention is further improved as follows: and the temperature of the circulating washing liquid cooled by the cooler and the ammonia content are set and adjusted according to the actual production situation.
The technical scheme of the invention is further improved as follows: the amount of carbon dioxide introduced into the low-pressure absorption tower, the normal-pressure absorption tower and the exhaust funnel is determined according to the actual production condition of the urea device.
Due to the adoption of the technical scheme, the invention has the technical progress that:
1. according to the invention, carbon dioxide is introduced into the low-pressure absorption tower and the bottom of the exhaust funnel, so that the carbon dioxide reacts with ammonia in the tail gas to fix the ammonia, and thus the content of ammonia at the outlet of the exhaust funnel is greatly reduced; meanwhile, the washing process of the upper-layer packing section and the lower-layer packing section arranged in the exhaust funnel is matched, so that the treatment effect of ammonia in the tail gas is further ensured.
2. The invention cancels the local discharge port of the low-pressure absorption tower, leads all tail gas to be processed in a centralized way, and discharges the tail gas after reaching the ultra-low discharge standard.
3. The invention only adds the filler section at the middle lower part of the exhaust funnel, has simple modification and low investment and is convenient for industrialized popularization.
4. The invention only adds the circulating pump, the power consumption is not obviously increased, and the operation cost is low.
5. The method does not generate new pollution sources such as acid-base wastewater and the like, does not need subsequent treatment procedures, and is green and environment-friendly.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a prior art configuration of the present invention;
wherein, 1, a low-pressure absorption tower, 2, a normal-pressure absorption tower, 3, an exhaust funnel, 3-1, an upper-layer packing section, 3-2, a lower-layer packing section, 3-3, a first spray device, 3-4, a second spray device, 4, an ammonia water tank, 5 and urine
Liquid tank, 6, accident tank, 7, circulating pump, 8, cooler.
Detailed Description
The invention is described in further detail below with reference to the following figures and examples:
as shown in fig. 1, an ultra-low emission system for treating ammonia in tail gas from urea production comprises a tail gas emission device, an exhaust funnel 3 for collecting tail gas and uniformly discharging, a carbon dioxide compressor and a spray cooling device; the gas outlet end of the tail gas discharge device is connected with the gas inlet end of the exhaust funnel 3; an upper-layer filling section 3-1 and a lower-layer filling section 3-2 are arranged in the exhaust funnel 3 from top to bottom. The fillers in the upper layer filler section 3-1 and the lower layer filler section 3-2 are pall rings, step rings, plate corrugated fillers and the like.
The tail gas discharge device comprises a low-pressure absorption tower 1, a normal-pressure absorption tower 2, an ammonia water tank 4, a urine tank 5 and an accident tank 6, wherein the liquid inlet end of the normal-pressure absorption tower 2 is connected with the liquid outlet end of the low-pressure absorption tower 1; the position of the tail gas of the low-pressure absorption tower 1 entering the exhaust funnel 3 is arranged below the liquid level of the washing liquid in the exhaust funnel 3; and tail gas of the normal pressure absorption tower 2, the ammonia water tank 4, the urine tank 5 and the accident tank 6 enters between the lower end of the lower layer filling section 3-2 in the exhaust funnel 3 and the liquid level of the washing liquid.
Introducing carbon dioxide from a carbon dioxide compressor below the liquid level at the bottoms of the low-pressure absorption tower 1, the normal-pressure absorption tower 2 and the exhaust funnel 3 to improve the absorption effect of ammonia; the outlet pressure, the temperature and the flow of the carbon dioxide provided by the carbon dioxide compressor are set and adjusted according to the actual production condition; the amount of carbon dioxide added into the low-pressure absorption tower 1, the normal-pressure absorption tower 2 and the exhaust funnel 3 is determined according to the actual production condition of the urea device.
The spraying cooling device comprises a first spraying device 3-3, a second spraying device 3-4, a circulating pump 7 and a cooler 8; desalted water is sprayed on the upper-layer filling section 3-1 through a first spraying device 3-3; and the washing liquid at the bottom of the exhaust funnel 3 is pumped to a cooler 8 through a circulating pump 7 for cooling, and the cooled washing liquid is sprayed above the lower-layer filler section 3-2 through a second spraying device 3-4. And a part of ammonia-containing washing liquid discharged from the circulating pump 7 is recycled in the working sections of ammonia distillation, deep hydrolysis or flue gas desulfurization. The temperature of the circulating washing liquid and the ammonia content after being cooled by the cooler 8 are set and adjusted according to the actual production situation. The liquid level of the washing liquid at the bottom of the exhaust funnel 3 is set and adjusted according to the actual production situation. The flow of the desalted water sprayed by the first spraying device 3-3 is set and adjusted according to the actual production condition.
Specifically, on the basis of the existing system (as shown in fig. 2), the exhaust funnel 3 is modified, two layers of filler sections, namely an upper layer filler section 3-1 and a lower layer filler section 3-2, are added at the lower part of the exhaust funnel 3, desalted water is sprayed above the upper layer filler section 3-1, washing liquid at the lower part of the exhaust funnel 3 (namely, the liquid falling into the bottom of the exhaust funnel 3 after the desalted water passes through the upper layer filler section 3-1 and the lower layer filler section 3-2) is pumped to a cooler 8 through a circulating pump 7 for cooling, the cooled washing liquid enters the upper part of the lower layer filler section 3-2, and the tail gas entering the exhaust funnel 3 is subjected to primary washing and absorption; and a part of ammonia-containing washing liquid discharged from the circulating pump 7 is recycled in the working sections of ammonia distillation, deep hydrolysis or flue gas desulfurization and the like.
And (3) plugging a tail gas on-site discharge port of the low-pressure absorption tower 1, introducing the tail gas into an exhaust funnel 3, and intensively discharging the tail gas after absorption by a washing solution. In order to ensure the absorption effect and the system operation safety, the tail gas inlet position of the low-pressure absorption tower 1 is arranged below the liquid level of the washing liquid at the lower part of the exhaust funnel 3.
And tail gas of the normal pressure absorption tower 2 enters the lower part of the filler section of the exhaust funnel 3, and is discharged after being washed and absorbed.
The tail gas of the ammonia water tank 4, the urine tank 5 and the accident tank 6 is also washed and absorbed by the filler section of the exhaust funnel 3 and then is intensively discharged.
And carbon dioxide is introduced into the bottom of the low-pressure absorption tower 1, the bottom of the normal-pressure absorption tower 2 and the bottom of the exhaust funnel 3 by the carbon dioxide compressor, and the absorption effect of ammonia is improved under the action of the carbon dioxide.
The atmospheric absorption tower 2 can also not be filled with carbon dioxide according to the actual production situation.
The working principle is as follows:
the tail gas from the high-pressure scrubber enters the lower part of the low-pressure absorption tower 1 and is in countercurrent contact with process condensate or desalted water from bottom to top through a packing layer, and the tail gas after most of ammonia is removed enters an exhaust funnel 3 for centralized emptying. The tail gas from the evaporation or low-pressure decomposition section enters the lower part of an atmospheric absorption tower 2, is in countercurrent contact with process condensate or desalted water from a low-pressure absorption tower 1 through a packing layer from bottom to top, and the tail gas after most of ammonia is removed enters an exhaust funnel 3 for centralized emptying.
The process condensate after the tail gas is washed by the packing layer in the normal pressure absorption tower 2 enters the ammonia water tank 4. The exhaust gases in the ammonia water tank 4, the urine tank 5 and the accident tank 6 respectively enter the exhaust funnel 3 for centralized emptying.
Carbon dioxide is introduced into the bottoms of the low-pressure absorption tower 1, the normal-pressure absorption tower 2 and the exhaust funnel 3, the absorption effect of ammonia is improved under the action of the carbon dioxide, and the reaction equation is as follows:
CO2+NH3+H2O=NH4HCO3
or CO2+2NH3+H2O=(NH4)2CO3
Or CO2+2NH3=NH2COONH4
The reactions that occur vary depending on the relative amounts of carbon dioxide and ammonia.
Examples
Taking annual 80 ten thousand tons of urea as an example: the exhaust emission of the low-pressure absorption tower 1 was 687m3H, ammonia content 0.19%; the exhaust emission in the atmospheric absorption tower 2 was 200m3The ammonia content was 3.86%.
When processing according to the prior art (as shown in fig. 2):
the ammonia content in the tail gas discharged from the low-pressure absorption tower 1 is about 250 ppm; the ammonia content in the exhaust gas discharged from the exhaust stack 3 was about 510 ppm.
When the ultra-low emission system for treating the ammonia in the urea production tail gas is adopted for treatment, the method comprises the following steps: the liquid level of the washing liquid at the bottom of the exhaust funnel 3 is controlled to be 800-1400 mm; the temperature of the circulating washing liquid cooled by the cooler 8 is 30-35 ℃, and the ammonia content is about 2.5%; the flow rate of the desalted water sprayed by the first spraying device 3-3 is controlled to be 6-10m3H; carbon dioxide at 40 ℃ from the outlet of the carbon dioxide compressor at 0.9MPa, about 200 Nm and 300Nm3The reaction solution enters the lower part of the liquid level at the bottom of the low-pressure absorption tower 1 for about 600-700Nm3And/h enters the bottom of the discharge cylinder 3 below the liquid level. The specific values can be adjusted depending on the throughput and production process to be achieved. (in this example, carbon dioxide was not introduced into the atmospheric pressure absorption column 2)
The tail gas discharged from the low-pressure absorption tower 1 enters the exhaust funnel 3 for treatment and then is discharged in a centralized manner, the tail gas is detected by a third-party detection mechanism, and the provided detection report shows that the ammonia content in the tail gas discharged from the exhaust funnel 3 is about 1.2 ppm.
Therefore, the effect of treating the tail gas by the ultra-low emission system for treating the tail gas ammonia in the urea production is obvious.
In conclusion, the carbon dioxide is introduced into the bottoms of the low-pressure absorption tower, the normal-pressure absorption tower and the exhaust funnel, so that the carbon dioxide reacts with the ammonia in the tail gas to fix the ammonia, and the content of the ammonia at the outlet of the exhaust funnel is greatly reduced; and simultaneously, the device is matched with the washing process of an upper-layer filler section and a lower-layer filler section arranged in the exhaust funnel, so that the treatment effect of ammonia in tail gas is further ensured.

Claims (9)

1. The utility model provides a urea production tail gas ammonia administers minimum discharge system which characterized in that: comprises a tail gas discharge device, an exhaust funnel (3) for collecting tail gas and uniformly discharging, a carbon dioxide compressor and a spray cooling device; the gas outlet end of the tail gas discharge device is connected with the gas inlet end of the exhaust funnel (3); an upper-layer filling section (3-1) and a lower-layer filling section (3-2) are arranged in the exhaust funnel (3) from top to bottom.
2. The system of claim 1, wherein the system comprises: the tail gas discharge device comprises a low-pressure absorption tower (1), a normal-pressure absorption tower (2) with a liquid inlet end connected with a liquid outlet end of the low-pressure absorption tower (1), an ammonia tank (4) connected with the liquid outlet end of the normal-pressure absorption tower (2), a urine tank (5) and an accident tank (6); the position of tail gas of the low-pressure absorption tower (1) entering the exhaust funnel (3) is arranged below the liquid level of the washing liquid at the bottom of the exhaust funnel (3).
3. The system of claim 2, wherein the system comprises: and carbon dioxide is introduced from a carbon dioxide compressor below the liquid level at the bottoms of the low-pressure absorption tower (1), the normal-pressure absorption tower (2) and the exhaust funnel (3) to improve the absorption effect of ammonia.
4. The system of claim 1, wherein the system comprises: the spray cooling device comprises a first spray device (3-3), a second spray device (3-4), a circulating pump (7) and a cooler (8); desalted water is sprayed on the upper-layer filling section (3-1) through a first spraying device (3-3); and the washing liquid at the bottom of the exhaust funnel (3) is pumped to a cooler (8) through a circulating pump (7) for cooling, and the cooled washing liquid is sprayed above the lower-layer filling section (3-2) through a second spraying device (3-4).
5. The system of claim 4, wherein the system comprises: and a part of ammonia-containing washing liquid discharged from the circulating pump (7) is recycled in the working sections of ammonia distillation, deep hydrolysis or flue gas desulfurization.
6. The system of claim 2, wherein the system comprises: and tail gas of the normal pressure absorption tower (2), the ammonia water tank (4), the urine tank (5) and the accident tank (6) enters between the lower end of the lower layer filler section (3-2) in the exhaust funnel (3) and the liquid level of the washing liquid.
7. The system for ammonia abatement and ultra-low emission of urea production tail gas according to any one of claims 1 or 3, wherein: and the outlet pressure, the temperature and the flow of the carbon dioxide provided by the carbon dioxide compressor are set according to the actual condition of the production device.
8. The system of claim 4, wherein the system comprises: the temperature of the circulating washing liquid cooled by the cooler (8) and the ammonia content are set and adjusted according to the actual production situation.
9. The system of claim 3, wherein the system comprises: the amount of carbon dioxide introduced into the low-pressure absorption tower (1), the normal-pressure absorption tower (2) and the exhaust funnel (3) is determined according to the actual production condition of the urea device.
CN202110653659.7A 2021-06-11 2021-06-11 Ultralow discharge system is administered to urea production tail gas ammonia Pending CN113274864A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110653659.7A CN113274864A (en) 2021-06-11 2021-06-11 Ultralow discharge system is administered to urea production tail gas ammonia

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110653659.7A CN113274864A (en) 2021-06-11 2021-06-11 Ultralow discharge system is administered to urea production tail gas ammonia

Publications (1)

Publication Number Publication Date
CN113274864A true CN113274864A (en) 2021-08-20

Family

ID=77284308

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110653659.7A Pending CN113274864A (en) 2021-06-11 2021-06-11 Ultralow discharge system is administered to urea production tail gas ammonia

Country Status (1)

Country Link
CN (1) CN113274864A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115286162A (en) * 2022-08-22 2022-11-04 吴嘉 Device and method for treating ammonia nitrogen wastewater easy to scale and recycling ammonia

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115286162A (en) * 2022-08-22 2022-11-04 吴嘉 Device and method for treating ammonia nitrogen wastewater easy to scale and recycling ammonia

Similar Documents

Publication Publication Date Title
CN105597535B (en) Method for treating mixed organic waste gas containing chlorine, hydrogen chloride and oxynitride
CN101244364B (en) Negative pressure soda liquor absorption technique for oxides of nitrogen waste gas
CN113274864A (en) Ultralow discharge system is administered to urea production tail gas ammonia
CN208449039U (en) Cokingization produces exhaust gas purification system
CN106823692A (en) A kind of ammonia-contaminated gas zero-emission and ammonia reclaiming process
CN216964118U (en) Ultralow discharge system is administered to urea production tail gas ammonia
CN109647168A (en) A method of using composite absorption liquid, Simultaneous Oxidation absorbs nitric oxide gas in hypergravity machine
CN111068501B (en) Absorption decomposition liquid, method and device for simultaneously removing hydrogen sulfide and ammonia waste gas
CN111054203B (en) Tail gas treatment method and system for DMF wastewater
CN210079197U (en) Novel ammonia recovery device
CN205133188U (en) Ammonia nitrogen blows and takes off device
CN1030965C (en) Method and apparatus for absorption of leaked chlorine
CN106861372A (en) Waste gas processing method containing EO, PO
CN103446851A (en) Recovery and purification device and method for phosphoric acid from tail gases generated in chemical method activated carbon production process
CN105214463A (en) A kind of processing method of aliphatic hydroxyl sulphonate water reducer process gas
CN113019070B (en) Resource treatment method for sulfonated waste gas and nitrated waste gas generated in dye production
CN212492322U (en) Ultra-clean processing apparatus of titanium dioxide acidolysis tail gas
CN211963703U (en) Treatment system for tail gas generated in DMF (dimethyl formamide) wastewater treatment
CN215250511U (en) Phenolate decomposing tower
CN206276219U (en) A kind of acid fog absorption tower tail gas clean-up tapping equipment
CN217988866U (en) Nitric oxide tail gas treatment device
CN111252839A (en) Novel process for treating hydrogenation type waste water and waste gas
CN219376593U (en) Sulfuric acid mist treatment device
CN108607352A (en) Cokingization produces exhaust gas purification system
CN218047240U (en) Automatic processing equipment of nitrogen trifluoride batch distillation tower tail gas

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination