CN112717673A - Desulfurization method for analytic waste gas in desulfurization liquid regeneration tank - Google Patents
Desulfurization method for analytic waste gas in desulfurization liquid regeneration tank Download PDFInfo
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- CN112717673A CN112717673A CN202011363129.0A CN202011363129A CN112717673A CN 112717673 A CN112717673 A CN 112717673A CN 202011363129 A CN202011363129 A CN 202011363129A CN 112717673 A CN112717673 A CN 112717673A
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- Prior art keywords
- gas
- desulfurization
- regeneration tank
- desulfurization solution
- solution
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 52
- 230000023556 desulfurization Effects 0.000 title claims abstract description 52
- 230000008929 regeneration Effects 0.000 title claims abstract description 38
- 238000011069 regeneration method Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000007788 liquid Substances 0.000 title claims abstract description 15
- 239000002912 waste gas Substances 0.000 title claims abstract description 9
- 239000007789 gas Substances 0.000 claims abstract description 42
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 11
- 238000005507 spraying Methods 0.000 claims abstract description 8
- 239000007921 spray Substances 0.000 claims abstract description 6
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 7
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- 238000003795 desorption Methods 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 229910052717 sulfur Inorganic materials 0.000 claims 1
- 239000011593 sulfur Substances 0.000 claims 1
- 230000008719 thickening Effects 0.000 abstract description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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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
- B01D53/79—Injecting reactants
-
- 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
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/606—Carbonates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention relates to a desulfurization method for analyzing waste gas by a desulfurization solution regeneration tank, which is characterized by comprising the following steps: expanding the diameter of an emptying pipe at the top of the original regeneration tank by 2-5 times, wherein a spraying device is arranged at the upper part of the emptying pipe, and a funnel-shaped liquid receiving device is arranged under the emptying pipe; (1) spraying the desulfurizing liquid from the spray device at the upper part of the blow-down pipe, and reversely contacting with the analytic gas from the lower part of the blow-down pipe to analyze H in the gas2S gas is absorbed by the desulfurization solution to react; (2) the absorbed gas is directly discharged from the upper part of the vent pipe, and the desulfurization solution enters a solution receiving device from the lower part of the vent pipe and is then recycled to a regeneration tank for solution regeneration. Has the advantages that: the problem of H in the analysis gas can be solved by thickening the emptying pipe, adding a desulfurizing device and a receiving device under the condition of not replacing the existing device2Question of S content exceeding standardProblem, H in desulfurized stripping gas2S content as low as 5mg/L H2S, the air can be directly discharged into the air; the absorbed desulfurization solution can be reused after being recovered.
Description
Technical Field
The invention belongs to the technical field of synthetic ammonia production, and relates to a desulfurization method for waste gas analyzed by a desulfurization solution regeneration tank.
Background
Existing synthesisIn the ammonia production process, the desulfurizing liquid regeneration tank is used to regenerate the desulfurizing gas (13-18 mg/L H)2S gas), the running time of the ventilation gas desulfurization device in the current production is long (nearly seven years), and the desulfurization liquid regeneration tank matched with the ventilation gas desulfurization device can not meet the current environmental protection requirement, so that heavy H exists around the regeneration tank2The S odor not only causes serious environmental impact, but also may cause harm to the health of operators, and because the acid gas in the emptying gas has corrosiveness, certain potential safety hazard exists to the safe operation of equipment.
Disclosure of Invention
The invention aims to solve the problem that the treatment capacity of a regeneration tank which has been operated for a long time can not meet the environmental protection requirement, and the solution gas contains 13-18mg/L H2S gas is directly discharged to pollute the environment, and a desulfurization method for analyzing waste gas by a desulfurization solution regeneration tank is provided.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a desulfurization method for desorption waste gas in a desulfurization solution regeneration tank comprises the regeneration tank, and is characterized in that: expanding the diameter of an emptying pipe at the top of the original regeneration tank by 2-5 times, wherein a spraying device is arranged at the upper part of the emptying pipe, and a funnel-shaped liquid receiving device is arranged under the emptying pipe;
the method comprises the following steps:
(1) spraying the desulfurizing liquid from the spray device at the upper part of the blow-down pipe, and reversely contacting with the analytic gas from the lower part of the blow-down pipe to analyze H in the gas2S gas is absorbed by the desulfurization solution to react;
(2) the absorbed gas is directly discharged from the upper part of the vent pipe, and the desulfurization solution enters a solution receiving device from the lower part of the vent pipe and is then recycled to a regeneration tank for solution regeneration.
Furthermore, the spraying device is a nozzle with a pipeline, and the nozzle extends into the hollow pipe.
Furthermore, a gap of 10-20cm is formed between the liquid receiving device and the emptying pipe, so that the analytic gas is conveniently discharged from the emptying pipe.
Further, the decomposed gas contains CO2:30-50%、O2:7-12%、CO:2-6%、N2:35-45%、CH4:0.4-2.0%、H2S：13-18mg/L。
Further, the desulfurization solution is Na2CO3Solution, with 888 catalyst (commercially available).
Further, the pH of the desulfurization solution is 8.0-9.0, and Na is contained2CO3：8-10g/L，NaHCO3: 60-70 g/L, total alkalinity: 0.8-1.0 gram equivalent/liter, 888 catalyst 4-10 mg/L.
The invention has the beneficial effects that: the invention can solve the problem of H in the analysis gas by thickening the emptying pipe, adding the desulfurizing device and the liquid receiving device under the condition of not replacing the existing device2The problem of the overproof S content, H in the desulfurized analysis gas2S content as low as 5mg/L H2S, the air can be directly discharged into the air; the absorbed desulfurization solution can be reused after being recovered.
Drawings
FIG. 1 is a schematic diagram of a desulfurization process for flue gas from desulfurization solution regeneration tank.
Detailed Description
The invention is further illustrated with reference to fig. 1:
the utility model provides a desulphurization unit of analytic waste gas of doctor solution regeneration tank, includes the regeneration tank, is equipped with the blow-down pipe at the regeneration tank top, and its diameter is 930mm, and blow-down pipe upper portion is equipped with the shower nozzle, and the shower nozzle is deepened in the blow-down pipe, and shower nozzle and pipeline link to each other, and be equipped with hourglass shape liquid device that connects under the blow-down pipe, wherein connect and have 5 cm's clearance between liquid device and the blow-down pipe.
A desulfurization method for analytic waste gas in a desulfurization solution regeneration tank comprises the following specific implementation steps:
example 1
(1) Adding the desulfurization solution (pH: 8.0, Na)2CO3：8g/L，NaHCO3: 60g/L, total alkalinity: 0.8 g eq/L888 catalyst 5 mg/L) was sprayed from a spray system at the upper part of the vent pipe, together with the gas (CO) from the lower part of the vent pipe2 43.6%、O2 8.4%、CO 4.2%、N2 42.6%、CH4 1.2%、H2S15 mg/L) are reversely contacted, and gas is analyzedH in (1)2S gas is absorbed by the desulfurization solution to react (the reaction equation is shown as follows);
(2) absorbed gas (CO)2:43%、O2:8.2%、CO:4.2%、N2:43.2%、CH4:1.4%、H2S: 5 mg/L) is directly discharged from the upper part of the vent pipe, and the desulfurization solution enters a solution receiving device from the lower part of the vent pipe and is then recycled to a regeneration tank for solution regeneration.
Example 2
(1) Adding the desulfurization solution (pH: 8.2, Na)2CO3：9g/L，NaHCO3: 65 g/L, total alkalinity: 0.9 g eq/L888 catalyst 6 mg/L) was sprayed from a spray system at the upper part of the vent pipe, together with the gas (CO) from the lower part of the vent pipe2:48%、O2:10%、CO:4.4%、N2:36%、CH4:1.6%、H2S: 14.5 mg/L) were reversely contacted, H in the gas was resolved2S gas is absorbed by the desulfurization solution to react;
(2) absorbed gas (CO)2:46%、O2:10.5%、CO:4.5%、N2:37.4%、CH4:1.6%、H2S: 4.5 mg/L) is directly discharged from the upper part of the vent pipe, and the desulfurization solution enters a solution receiving device from the lower part of the vent pipe and is then recycled to a regeneration tank for solution regeneration.
Example 3
(1) The desulfurization solution (pH: 8.3, Na)2CO3：10g/L，NaHCO3: 70 g/L, total alkalinity: 1.0 g equiv/L888 catalyst 10 mg/L) was sprayed from a spray system at the upper part of the vent pipe together with the gas (CO) to be analyzed from the lower part of the vent pipe2:42%、O2:8.5%、CO:2.7%、N2:45%、CH4:1.8%、H2S: 17.5 mg/L) were reversely contacted, H in the gas was resolved2S gas is absorbed by the desulfurization solution to react;
(2) absorbed gas (CO)2:41%、O2:10.2%、CO:2.6%、N2:44.4%、CH4:1.8%、H2S: 4 mg/L) is directly discharged from the upper part of the vent pipe, and the desulfurization solution enters a solution receiving device from the lower part of the vent pipe and is then recycled to a regeneration tank for solution regeneration.
Claims (6)
1. A desulfurization method for desorption waste gas in a desulfurization solution regeneration tank comprises the regeneration tank, and is characterized in that: expanding the diameter of an emptying pipe at the top of the original regeneration tank by 2-5 times, wherein a spraying device is arranged at the upper part of the emptying pipe, and a funnel-shaped liquid receiving device is arranged under the emptying pipe;
the method comprises the following steps:
(1) spraying the desulfurizing liquid from the spray device at the upper part of the blow-down pipe, and reversely contacting with the analytic gas from the lower part of the blow-down pipe to analyze H in the gas2S gas is absorbed by the desulfurization solution to react;
(2) the absorbed gas is directly discharged from the upper part of the vent pipe, and the desulfurization solution enters a solution receiving device from the lower part of the vent pipe and is then recycled to a regeneration tank for solution regeneration.
2. The method of desulfurizing a desulfurization solution-containing flue gas in a desulfurization solution regeneration tank according to claim 1, characterized in that: the spraying device is a nozzle with a pipeline, and the nozzle extends into the hollow pipe.
3. The method of desulfurizing a desulfurization solution-containing flue gas in a desulfurization solution regeneration tank according to claim 1, characterized in that: a gap of 10-20cm is formed between the liquid receiving device and the emptying pipe, so that the analytic gas is conveniently discharged from the emptying pipe.
4. The method of desulfurizing a desulfurization solution-analyzed exhaust gas in a desulfurization solution regeneration tank according to claim 1, 2 or 3, characterized in that: the decomposed gas contains CO2:30-50%、O2:7-12%、CO:2-6%、N2:35-45%、CH4:0.4-2.0%、H2S：13-18mg/L。
5. The desulfurization solution regeneration tank according to claim 1, 2 or 3, for removing the desorption exhaust gasA sulfur process, characterized by: the desulfurization solution is Na2CO3Adding 888 of catalyst into the solution.
6. The method of desulfurizing a desulfurization solution-analyzed exhaust gas in a desulfurization solution regeneration tank according to claim 1, 2 or 3, characterized in that: the pH of the desulfurization solution is 8.0-9.0, and the desulfurization solution contains Na2CO3：8-10g/L，NaHCO3: 60-70 g/L, total alkalinity: 0.8-1.0 gram equivalent/liter, 888 catalyst 4-10 mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011363129.0A CN112717673A (en) | 2020-11-28 | 2020-11-28 | Desulfurization method for analytic waste gas in desulfurization liquid regeneration tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011363129.0A CN112717673A (en) | 2020-11-28 | 2020-11-28 | Desulfurization method for analytic waste gas in desulfurization liquid regeneration tank |
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| CN112717673A true CN112717673A (en) | 2021-04-30 |
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| CN202011363129.0A Pending CN112717673A (en) | 2020-11-28 | 2020-11-28 | Desulfurization method for analytic waste gas in desulfurization liquid regeneration tank |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5518254A (en) * | 1978-07-26 | 1980-02-08 | Nissan Eng Kk | Improved wet desulfurization |
| JP2003201488A (en) * | 2001-10-19 | 2003-07-18 | Mitsubishi Chemicals Corp | Wet desulfurization method |
| CN104650993A (en) * | 2015-03-15 | 2015-05-27 | 辽宁圣赫机械制造成套设备有限公司 | Cooking gas desulfurization and regeneration integrated tower |
| CN108246082A (en) * | 2018-01-13 | 2018-07-06 | 安徽金禾实业股份有限公司 | Waste gas processing method and device in a kind of liquid method desulfurization regeneration system |
| CN108786398A (en) * | 2017-05-02 | 2018-11-13 | 中国石油化工股份有限公司 | Flue gas desulfurization regenerates integrated tower and Regeneratable wet fuel gas desulfurizing method |
| CN208742272U (en) * | 2018-07-16 | 2019-04-16 | 湖北三宁化工股份有限公司 | A kind of oxidation regeneration slot improving Regeneration Efficiency for Desulfurization |
| CN111321016A (en) * | 2018-12-17 | 2020-06-23 | 江苏科行环保股份有限公司 | Regeneration device and process for desulfurization rich solution in coal gas hydrogen sulfide removal |
-
2020
- 2020-11-28 CN CN202011363129.0A patent/CN112717673A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5518254A (en) * | 1978-07-26 | 1980-02-08 | Nissan Eng Kk | Improved wet desulfurization |
| JP2003201488A (en) * | 2001-10-19 | 2003-07-18 | Mitsubishi Chemicals Corp | Wet desulfurization method |
| CN104650993A (en) * | 2015-03-15 | 2015-05-27 | 辽宁圣赫机械制造成套设备有限公司 | Cooking gas desulfurization and regeneration integrated tower |
| CN108786398A (en) * | 2017-05-02 | 2018-11-13 | 中国石油化工股份有限公司 | Flue gas desulfurization regenerates integrated tower and Regeneratable wet fuel gas desulfurizing method |
| CN108246082A (en) * | 2018-01-13 | 2018-07-06 | 安徽金禾实业股份有限公司 | Waste gas processing method and device in a kind of liquid method desulfurization regeneration system |
| CN208742272U (en) * | 2018-07-16 | 2019-04-16 | 湖北三宁化工股份有限公司 | A kind of oxidation regeneration slot improving Regeneration Efficiency for Desulfurization |
| CN111321016A (en) * | 2018-12-17 | 2020-06-23 | 江苏科行环保股份有限公司 | Regeneration device and process for desulfurization rich solution in coal gas hydrogen sulfide removal |
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Application publication date: 20210430 |