CN109603432A - A kind of ammonia-containing exhaust absorbs the processing method of application - Google Patents
A kind of ammonia-containing exhaust absorbs the processing method of application Download PDFInfo
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- CN109603432A CN109603432A CN201811447020.8A CN201811447020A CN109603432A CN 109603432 A CN109603432 A CN 109603432A CN 201811447020 A CN201811447020 A CN 201811447020A CN 109603432 A CN109603432 A CN 109603432A
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- absorption
- level
- column
- ammonia
- spray
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 45
- 238000003672 processing method Methods 0.000 title claims abstract description 16
- 238000010521 absorption reaction Methods 0.000 claims abstract description 122
- 239000007921 spray Substances 0.000 claims abstract description 23
- 235000015895 biscuits Nutrition 0.000 claims abstract description 17
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims abstract description 15
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims abstract description 11
- 238000005660 chlorination reaction Methods 0.000 claims abstract description 11
- 235000019270 ammonium chloride Nutrition 0.000 claims abstract description 8
- 238000012546 transfer Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000008367 deionised water Substances 0.000 claims abstract description 6
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 20
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 12
- 238000011156 evaluation Methods 0.000 claims description 10
- 230000002411 adverse Effects 0.000 claims description 6
- 230000005587 bubbling Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000004064 recycling Methods 0.000 abstract description 2
- 238000012797 qualification Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 37
- 239000000945 filler Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 5
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000003421 catalytic decomposition reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000003205 fragrance Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 238000011953 bioanalysis Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005406 washing Methods 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
- B01D53/1412—Controlling the absorption process
-
- 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
- B01D53/1425—Regeneration of liquid absorbents
-
- 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
- B01D2257/40—Nitrogen compounds
- B01D2257/406—Ammonia
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 the processing methods that a kind of ammonia-containing exhaust absorbs application, include the following steps: that three-level absorbing column adds deionized water in advance, tail gas and spray-absorption carry out counterflow exchange absorption, tail gas qualification discharge after absorbing simultaneously, after ammonium chloride concentration reaches specified value in three-level absorbing liquid, it will be reabsorbed by pipeline disk toward second level spray-absorption column；After second level absorbing column spray-absorption and tail gas carry out counterflow exchange absorption, after solution chlorination ammonium concentration reaches specified value in absorbing column, first order absorption column, then spray-absorption are gone to by biscuit pipe；First order absorption column spray tube and ammonia-containing exhaust carry out counterflow exchange absorption and go to transfer tank by biscuit pipe after ammonium chloride reaches specified value containing ammonia density in column, then go to main flow use by the road.The present invention uses the device for absorbing tail gas of designed, designed, and the solution after fully absorbing to ammonia tail gas can return to main flow use, realize the recycling of ammonia, substantially reduce production cost, increase economic efficiency.
Description
Technical field
The present invention relates to chemical industry tail gas processing technology fields, and specifically, a kind of ammonia-containing exhaust absorbs the processing method of application.
Background technique
Ammonia is one of eight kinds of odorant pollutants as defined in State Ministry of Environmental Protection, and foul gas containing ammonia not only threatens the mankind strong
Health, and ecological environment can be caused to seriously endanger.Common odorant pollutant processing technique has absorption method, combustion method, chemical absorbing
Method, bioanalysis etc..With the continuous improvement of environmental requirement, production tail gas in the production process of chemical plant how is recycled and without group
Discharge gas is knitted, one of the difficult point of numerous Chemical Manufacture enterprises is had become.
Tradition uses Physical Absorption, chemical absorbing, catalytic decomposition or biodegrade etc. to handle in ammonia nitrogen tail gas substantially
Absorption/absorption method is also combined with aerobic catalytic decomposition and carries out ammonia nitrogen tail gas absorption or raw using extraction by method
At processing modes such as ammonium chlorides, the generally existing disadvantage of the above processing method is as follows:
1. needing a large amount of water；
2. a large amount of weak aqua ammonias that absorption process generates need to carry out concentration, a large amount of steam is consumed；
3. recovery efficiency is lower；
4. the tail gas after washing need to be handled by burning, a large amount of nitrogenous tail gas of generation, generation secondary pollution, therefore these
Processing method higher cost, process flow is longer, and economic benefit is low.
Summary of the invention
Present invention aims to overcome that the above-mentioned prior art is insufficient, realistic development is adapted to, a kind of ammonia-containing exhaust absorption is provided
The processing method of application.
In order to achieve the above objectives, The technical solution adopted by the invention is as follows:
A kind of ammonia-containing exhaust absorbs the processing method of application, includes the following steps:
(1) three-level absorbing column is previously added deionized water, and ammonia-containing exhaust and three-level absorbing column spray-absorption carry out adverse current friendship
Absorption, and On-line Control pH=6.5~7.0 are changed, automatic plus hydrochloric acid control is carried out according to the variation of PH evaluation, keeps pH value
Stablize；Meanwhile qualified three-level after three-level absorbing column absorption processing is absorbed into exhaust emissions, until the interior suction of three-level absorbing column
It receives chlorination processes ammonium concentration and reaches 10~40%, then underproof three-level will be inhaled after three-level absorbing column absorption processing by biscuit pipe
Ending gas carries out second level absorption processing toward second level spray-absorption column；
(2) underproof three-level absorbs tail gas after three-level absorbing column absorption processing and second level absorbing column spray-absorption carries out
Counterflow exchange absorbs, and On-line Control pH=6.5~7.0, carries out automatic plus hydrochloric acid control according to the variation of PH evaluation, until
The chlorination processes ammonium concentration of interior absorption of second level absorbing column reaches 40~50%, then will be handled through second level absorbing column absorption by biscuit pipe
Second level afterwards absorbs tail gas and carries out first order absorption processing toward level-one spray-absorption column；
(3) absorb that treated second level absorbs tail gas and first order absorption column spray-absorption carries out adverse current friendship through second level absorbing column
Absorption is changed, until the ammonium chloride in first order absorption column reaches 50~60% containing ammonia density, it will be through first order absorption column by biscuit pipe
It absorbs that treated that first order absorption tail gas goes to transfer tank, goes to main flow using pipeline and use.
Further, the ammonia content of the ammonia-containing exhaust is 100~10000mg/Nm3。
Further, the ammonia content that three-level qualified after three-level absorbing column absorption processing absorbs tail gas is lower than 5mg/Nm3。
Further, the three-level absorbing column, second level absorbing column and first order absorption column are gas-liquid mass transfer consersion unit, specifically
For one of bubbling column reactor, filler tower reactor, impact flow reactor or venturi reactor.
Further, the spray time of step (1)~(3) each absorbing column be 20~for 24 hours, spray rate be 20~
30M3/h。
Compared with prior art, the advantages and positive effects of the present invention are as follows:
Using three-level pillar counter-current absorption device, the absorbing liquid of rear stage will go to previous stage after reaching certain requirement
It is reabsorbed, improves solution concentration in absorbing liquid, after final first order absorbing liquid reaches technique requirement, go to main flow progress
It uses, substantially reduces production cost, absorbing that treated, ammonia-containing exhaust reaches discharge standard, and this method has processing cost low,
And it is safe and environment-friendly, there is higher economic value.
Using the device for absorbing tail gas of designed, designed, ammonia tail gas is fully absorbed, the solution after absorption can return
Main flow uses, and realizes the recycling of ammonia, substantially reduces production cost, increases economic efficiency.
Detailed description of the invention
Fig. 1 ammonia nitrogen tail gas absorbing system pipeline connection figure；
The structural front view of Fig. 2 absorbing column；
The structure top view of Fig. 3 absorbing column；
Specific embodiment
It elaborates below with reference to specific embodiments of the present invention.
Embodiment 1
A kind of ammonia-containing exhaust absorbs the processing method of application, includes the following steps:
(1) three-level absorbing column is previously added deionized water, ammonia content 100mg/Nm3Ammonia-containing exhaust and three-level absorbing column
Spray-absorption carries out counterflow exchange absorption, and On-line Control pH=6.5~7.0, carries out adding salt automatically according to the variation of PH evaluation
The control of acid makes pH value keep stablizing；Meanwhile qualified three-level after three-level absorbing column absorption processing is absorbed into exhaust emissions,
Until the chlorination processes ammonium concentration of interior absorption of three-level absorbing column reaches 30%, then will be handled through three-level absorbing column absorption by biscuit pipe
Underproof three-level absorbs tail gas toward the progress second level absorption processing of second level spray-absorption column afterwards；Wherein, the spray of three-level absorbing column
Time is spray rate 30M for 24 hours3/h；The ammonia content of qualified three-level absorption tail gas is low after three-level absorbing column absorption processing
In 5mg/Nm3。
(2) underproof three-level absorbs tail gas after three-level absorbing column absorption processing and second level absorbing column spray-absorption carries out
Counterflow exchange absorbs, and On-line Control pH=6.5~7.0, carries out automatic plus hydrochloric acid control according to the variation of PH evaluation, until
The chlorination processes ammonium concentration of interior absorption of second level absorbing column reaches 45%, then by the way that biscuit pipe will treated through the absorption of second level absorbing column
Second level absorbs tail gas and carries out first order absorption processing toward level-one spray-absorption column；Wherein, the spray time of second level absorbing column is 22h,
Spray rate is 25M3/h。
(3) absorb that treated second level absorbs tail gas and first order absorption column spray-absorption carries out adverse current friendship through second level absorbing column
Absorption is changed, until the ammonium chloride in first order absorption column reaches 55% containing ammonia density, will be absorbed through first order absorption column by biscuit pipe
Treated, and first order absorption tail gas goes to transfer tank, goes to main flow using pipeline and uses；Wherein, the spray of first order absorption column
Time is 20h, spray rate 30M3/h；
The three-level absorbing column, second level absorbing column and first order absorption column are filler tower reactor, and in packed tower
Filler is Pall ring filler 1.2m3。
Embodiment 2
A kind of ammonia-containing exhaust absorbs the processing method of application, includes the following steps:
(1) three-level absorbing column is previously added deionized water, ammonia content 5000mg/Nm3Ammonia-containing exhaust and three-level absorb
Column spray-absorption carries out counterflow exchange absorption, and On-line Control pH=6.5~7.0, add automatically according to the variation of PH evaluation
The control of hydrochloric acid makes pH value keep stablizing；Meanwhile qualified three-level after three-level absorbing column absorption processing is absorbed into tail gas row
It puts, until the chlorination processes ammonium concentration of interior absorption of three-level absorbing column reaches 40%, then will be absorbed through three-level absorbing column by biscuit pipe
Underproof three-level absorbs tail gas toward the progress second level absorption processing of second level spray-absorption column after processing；Wherein, three-level absorbing column
Spray time is spray rate 30M for 24 hours3/h；The ammonia that qualified three-level absorbs tail gas after three-level absorbing column absorption processing contains
Amount is lower than 5mg/Nm3。
(2) underproof three-level absorbs tail gas after three-level absorbing column absorption processing and second level absorbing column spray-absorption carries out
Counterflow exchange absorbs, and On-line Control pH=6.5~7.0, carries out automatic plus hydrochloric acid control according to the variation of PH evaluation, until
The chlorination processes ammonium concentration of interior absorption of second level absorbing column reaches 50%, then by the way that biscuit pipe will treated through the absorption of second level absorbing column
Second level absorbs tail gas and carries out first order absorption processing toward level-one spray-absorption column；Wherein, the spray time of second level absorbing column is 20h,
Spray rate is 25M3/h。
(3) absorb that treated second level absorbs tail gas and first order absorption column spray-absorption carries out adverse current friendship through second level absorbing column
Absorption is changed, until the ammonium chloride in first order absorption column reaches 60% containing ammonia density, will be absorbed through first order absorption column by biscuit pipe
Treated, and first order absorption tail gas goes to transfer tank, goes to main flow using pipeline and uses；Wherein, the spray of first order absorption column
Time is 20h, spray rate 20M3/h；
The three-level absorbing column, second level absorbing column and first order absorption column are filler tower reactor, and in packed tower
Filler is Pall ring filler 1.2m3。
Embodiment 3
A kind of ammonia-containing exhaust absorbs the processing method of application, includes the following steps:
(1) three-level absorbing column is previously added deionized water, ammonia content 10000mg/Nm3Ammonia-containing exhaust and three-level absorb
Column spray-absorption carries out counterflow exchange absorption, and On-line Control pH=6.5~7.0, add automatically according to the variation of PH evaluation
The control of hydrochloric acid makes pH value keep stablizing；Meanwhile qualified three-level after three-level absorbing column absorption processing is absorbed into tail gas row
It puts, until the chlorination processes ammonium concentration of interior absorption of three-level absorbing column reaches 10%, then will be absorbed through three-level absorbing column by biscuit pipe
Underproof three-level absorbs tail gas toward the progress second level absorption processing of second level spray-absorption column after processing；Wherein, three-level absorbing column
Spray time is spray rate 30M for 24 hours3/h；The ammonia that qualified three-level absorbs tail gas after three-level absorbing column absorption processing contains
Amount is lower than 5mg/Nm3。
(2) underproof three-level absorbs tail gas after three-level absorbing column absorption processing and second level absorbing column spray-absorption carries out
Counterflow exchange absorbs, and On-line Control pH=6.5~7.0, carries out automatic plus hydrochloric acid control according to the variation of PH evaluation, until
The chlorination processes ammonium concentration of interior absorption of second level absorbing column reaches 40%, then by the way that biscuit pipe will treated through the absorption of second level absorbing column
Second level absorbs tail gas and carries out first order absorption processing toward level-one spray-absorption column；Wherein, the spray time of second level absorbing column be for 24 hours,
Spray rate is 25M3/h。
(3) absorb that treated second level absorbs tail gas and first order absorption column spray-absorption carries out adverse current friendship through second level absorbing column
Absorption is changed, until the ammonium chloride in first order absorption column reaches 50% containing ammonia density, will be absorbed through first order absorption column by biscuit pipe
Treated, and first order absorption tail gas goes to transfer tank, goes to main flow using pipeline and uses；Wherein, the spray of first order absorption column
Time is 20h, spray rate 20M3/h；
The three-level absorbing column, second level absorbing column and first order absorption column are filler tower reactor, and in packed tower
Filler is Pall ring filler 1.2m3。
Above-described embodiment is only more excellent embodiment of the invention, is implemented according to the technical essence of the invention to above
Any simple modification, modification and the alternate variation that example is made, belong in the range of technical solution of the present invention.
Claims (5)
1. the processing method that a kind of ammonia-containing exhaust absorbs application, characterized by the following steps:
(1) three-level absorbing column is previously added deionized water, and ammonia-containing exhaust and three-level absorbing column spray-absorption carry out counterflow exchange suction
It receives, and On-line Control pH=6.5~7.0, automatic plus hydrochloric acid control is carried out according to the variation of PH evaluation, pH value is made to keep steady
It is fixed；Meanwhile qualified three-level after three-level absorbing column absorption processing is absorbed into exhaust emissions, until the interior absorption of three-level absorbing column
Chlorination processes ammonium concentration reaches 10~40%, then underproof three-level will be absorbed after three-level absorbing column absorption processing by biscuit pipe
Tail gas carries out second level absorption processing toward second level spray-absorption column；
(2) underproof three-level absorbs tail gas after three-level absorbing column absorption processing and second level absorbing column spray-absorption carries out adverse current
Exchange absorbs, and On-line Control pH=6.5~7.0, automatic plus hydrochloric acid control is carried out according to the variation of PH evaluation, until second level
The chlorination processes ammonium concentration of interior absorption of absorbing column reaches 40~50%, then by the way that biscuit pipe will treated through the absorption of second level absorbing column
Second level absorbs tail gas and carries out first order absorption processing toward level-one spray-absorption column；
(3) absorb that treated second level absorbs tail gas and first order absorption column spray-absorption carries out counterflow exchange suction through second level absorbing column
It receives, until the ammonium chloride in first order absorption column reaches 50~60% containing ammonia density, will be absorbed through first order absorption column by biscuit pipe
Treated, and first order absorption tail gas goes to transfer tank, goes to main flow using pipeline and uses.
2. the processing method that a kind of ammonia-containing exhaust according to claim 1 absorbs application, it is characterised in that: the tail containing ammonia
The ammonia content of gas is 100~10000mg/Nm3。
3. the processing method that a kind of ammonia-containing exhaust according to claim 1 absorbs application, it is characterised in that: absorbed through three-level
The ammonia content that qualified three-level absorbs tail gas after column absorption processing is lower than 5mg/Nm3。
4. the processing method that a kind of ammonia-containing exhaust according to claim 1 absorbs application, it is characterised in that: the three-level is inhaled
Receiving column, second level absorbing column and first order absorption column is gas-liquid mass transfer consersion unit, specially bubbling column reactor, packed tower reaction
One of device, impact flow reactor or venturi reactor.
5. the processing method that a kind of ammonia-containing exhaust according to claim 1 absorbs application, it is characterised in that: step (1)~
(3) spray time of each absorbing column is 20~24 hours, and spray rate is 20~30M3/ hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811447020.8A CN109603432A (en) | 2018-11-29 | 2018-11-29 | A kind of ammonia-containing exhaust absorbs the processing method of application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811447020.8A CN109603432A (en) | 2018-11-29 | 2018-11-29 | A kind of ammonia-containing exhaust absorbs the processing method of application |
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| CN109603432A true CN109603432A (en) | 2019-04-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110963508A (en) * | 2020-01-15 | 2020-04-07 | 河南申越检测技术有限公司 | Device and process for preparing solid ammonium chloride from ammonia-containing waste gas |
| CN111482059A (en) * | 2020-03-26 | 2020-08-04 | 厦门钨业股份有限公司 | Treatment method of ammonia-containing tail gas and ammonia-containing tail gas treatment system |
| CN114984733A (en) * | 2022-05-10 | 2022-09-02 | 成都虹波钼业有限责任公司 | Method for treating mixed gas containing carbon dioxide and ammonia |
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| CN110963508B (en) * | 2020-01-15 | 2024-05-14 | 河南申越检测技术有限公司 | Device and process for preparing solid ammonium chloride from ammonia-containing waste gas |
| CN111482059A (en) * | 2020-03-26 | 2020-08-04 | 厦门钨业股份有限公司 | Treatment method of ammonia-containing tail gas and ammonia-containing tail gas treatment system |
| CN114984733A (en) * | 2022-05-10 | 2022-09-02 | 成都虹波钼业有限责任公司 | Method for treating mixed gas containing carbon dioxide and ammonia |
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