CN109485072A - The integrated conduct method of form waste gas of sulfur dioxide - Google Patents
The integrated conduct method of form waste gas of sulfur dioxide Download PDFInfo
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- CN109485072A CN109485072A CN201811554657.7A CN201811554657A CN109485072A CN 109485072 A CN109485072 A CN 109485072A CN 201811554657 A CN201811554657 A CN 201811554657A CN 109485072 A CN109485072 A CN 109485072A
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- sulfur dioxide
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- waste gas
- form waste
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/14—Preparation of sulfites
-
- 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
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B11/00—Oxides or oxyacids of halogens; Salts thereof
- C01B11/04—Hypochlorous acid
- C01B11/06—Hypochlorites
- C01B11/062—Hypochlorites of alkali metals
-
- 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
- B01D2251/604—Hydroxides
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- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention belongs to form waste gas of sulfur dioxide processing technology fields, and in particular to the integrated conduct method of form waste gas of sulfur dioxide.Present invention solves the technical problem that being high containing content of sulfur dioxide after form waste gas of sulfur dioxide is handled.The invention discloses the integrated conduct methods of form waste gas of sulfur dioxide, step is: a, the form waste gas of sulfur dioxide for collecting gas washing in SA production factory, it is delivered to absorption tower after dedusting, mass concentration is used to absorb for 10%~17% soda bath, the exhaust gas after obtaining sodium sulfite solution and lye absorption；B, waste chlorine is passed through in the exhaust gas after absorbing to lye and obtains mixed gas, the soda bath that mixed gas mass concentration is 10%~17% is absorbed, and absorbing terminal is effective alkali content less than 1%；Absorption handles to obtain liquor natrii hypochloritis and content of sulfur dioxide is less than the residual gas of 50ppm.Form waste gas of sulfur dioxide is handled using the method for the present invention, the content of sulfur dioxide is less than 50ppm in the residual gas that makes that treated.
Description
Technical field
The invention belongs to form waste gas of sulfur dioxide processing technology fields, and in particular to the integrated treatment side of form waste gas of sulfur dioxide
Method.
Background technique
Sulphuric acid production enterprises absorb the sulfur dioxide gas in exhaust gas using ammonium hydroxide, milk of lime etc., such processing mode is deposited
Absorption rate of sulfur dioxide it is low, absorb treatment fluid use not easy to store, treatment process stability is poor.Meanwhile the new regulation of country, add
The strong exhaust management of sulfur dioxide, has further lowered the discharge index of sulfur dioxide, how more efficient steadily to handle
SO 2 in waste gas has great importance.
Free chlorine in the salt water and sewage of chemical industry for making chlorine and alkali, the free chlorine etc. in titanium sponge production waste water are related to chlorine production enterprise
Industry needs to add sodium sulfite to remove the residual free chlorine in solution under alkaline condition, and wherein sewage treatment uses sodium sulfite
Quality requirements it is low, but dosage is big, high using the quality requirements of sodium sulfite in production technology and continuous-stable is needed to make
With increasing the demand of sodium sulfite.
Summary of the invention
The technical problem to be solved by the present invention is to the content of sulfur dioxide contained after the processing of existing form waste gas of sulfur dioxide is higher.
The technical solution used to solve the technical problems of the present invention is that the integrated conduct method of form waste gas of sulfur dioxide is provided,
Include the following steps:
A, collect gas washing in SA production factory form waste gas of sulfur dioxide, absorption tower is delivered to after dedusting, use mass concentration for
10%~17% soda bath absorbs, the exhaust gas after obtaining sodium sulfite solution and lye absorption；
B, chlorine is passed through in the exhaust gas after absorbing to lye and obtains mixed gas, is 10% by mixed gas mass concentration
~17% soda bath absorbs, and absorbing terminal is effective alkali content less than 1%；Absorption handles to obtain liquor natrii hypochloritis and residual
Remaining exhaust gas.
Wherein, in the integrated conduct method of above-mentioned form waste gas of sulfur dioxide, the body of sulfur dioxide in the form waste gas of sulfur dioxide
Product concentration is 0.2%~10%.
Wherein, described to collect the two of gas washing in SA production factory in step a in the integrated conduct method of above-mentioned form waste gas of sulfur dioxide
Sulfur oxide exhaust gas uses tiny structure condition for -2~0KPa；Conveying uses positive pressure for 5~20KPa after dedusting.
Wherein, in the integrated conduct method of above-mentioned form waste gas of sulfur dioxide, in step a, use mass concentration for 10%~
The absorption terminal of 17% soda bath sulfur dioxide absorption exhaust gas is 9~11.
Wherein, in the integrated conduct method of above-mentioned form waste gas of sulfur dioxide, in step a, the quality of the sodium sulfite solution
Concentration is 10%~20%.
Wherein, in the integrated conduct method of above-mentioned form waste gas of sulfur dioxide, in step b, the chlorine is waste chlorine；Chlorine
Volumetric concentration is 5%~70%.
Wherein, in the integrated conduct method of above-mentioned form waste gas of sulfur dioxide, in step b, when absorption reaches end point requirements, and
Shi Genghuan soda bath.
Wherein, in the integrated conduct method of above-mentioned form waste gas of sulfur dioxide, in step b, dissociate in the liquor natrii hypochloritis
Chlorinity is 6%~10%.
Wherein, in the integrated conduct method of above-mentioned form waste gas of sulfur dioxide, the soda bath is prepared using pure water.
The beneficial effects of the present invention are:
The method of the present invention utilizes soda bath sulfur dioxide absorption, and the sodium sulfite solution being prepared is directly as auxiliary material
It uses；The exhaust gas of lye preliminary treatment is passed through chlorine, using hypochlorous strong oxidizing property, two in the residual gas that makes that treated
The content of sulfur oxide is substantially less than 50ppm.The sodium sulfite solution that the method for the present invention obtains can be used for demineralized water and sewage
In free chlorine；Redundance sodium sulfite product can directly transport the sewage for the peripheries such as chlor-alkali, titanium sponge She Lv enterprise
Except free chlorine uses, good liquid sodium nitrite is produced using exhaust gas, directly meets production, while reducing production cost,
Solve the problems, such as that impurity is brought in sodium sulfite storage oxidation into.The waste chlorine processing system of chlor-alkali enterprises is utilized in the method for the present invention
System, by waste chlorine and the first step, treated after exhaust gas mix, then is absorbed with lye, discharges the sulfur dioxide in tail gas handled
Amount is far below the 400ppm of requirements of the national standard, has high treating effect, alleviates influence of the exhaust emissions to environment, and real
The comprehensive utilization of exhaust gas resource is showed.The liquor natrii hypochloritis that the method for the present invention is handled can be used for producing thimerosal.
Detailed description of the invention
Fig. 1 is the flow chart of form waste gas of sulfur dioxide processing of the present invention.
Specific embodiment
Specifically, this method comprises the following steps the invention discloses the integrated conduct method of form waste gas of sulfur dioxide:
A, collect gas washing in SA production factory form waste gas of sulfur dioxide, absorption tower is delivered to after dedusting, use mass concentration for
10%~17% soda bath absorbs, the exhaust gas after obtaining sodium sulfite solution and lye absorption；
B, chlorine is passed through in the exhaust gas after absorbing to lye and obtains mixed gas, is 10% by mixed gas mass concentration
~17% soda bath absorbs, and absorbing terminal is effective alkali content less than 1%；Absorption handles to obtain liquor natrii hypochloritis and residual
Remaining exhaust gas.
In the present invention, the form waste gas of sulfur dioxide first step of gas washing in SA production factory is absorbed to the titanium dioxide in exhaust gas using lye
Sodium sulfite is directly prepared in sulphur, can be directly used for chlor-alkali, titanium sponge enterprise sewage except free chlorine use, reduce simultaneously
Cost.Second step, which is used, is passed through waste chlorine processing in the exhaust gas after absorbing to lye, effectively improve the place of sulfur dioxide
Effect is managed, the content of the SO 2 in waste gas after making final process is less than 50ppm.
Wherein, in the integrated conduct method of above-mentioned form waste gas of sulfur dioxide, the body of sulfur dioxide in the form waste gas of sulfur dioxide
Product concentration is 0.2%~10%.The source exhaust gas of sulfuric acid plant is more, and pressure stability is poor, and the sulfur dioxide concentration in exhaust gas exists
Variation in 0.2%~10%.
Wherein, described to collect the two of gas washing in SA production factory in step a in the integrated conduct method of above-mentioned form waste gas of sulfur dioxide
Sulfur oxide exhaust gas uses tiny structure condition for -2~0KPa；Conveying uses positive pressure for 5~20KPa after dedusting.In this hair
In bright, the form waste gas of sulfur dioxide of gas washing in SA production factory is needed first to use air-introduced machine after gravitational dust collection and electric precipitation carry out purified treatment
Exhaust gas after collecting dust-removing is delivered to She Lv enterprise by plastic conduit, then absorbs dioxy using soda bath on absorption tower
Change sulphur.
Wherein, in the integrated conduct method of above-mentioned form waste gas of sulfur dioxide, in step a, use mass concentration for 10%~
The absorption terminal of 17% soda bath sulfur dioxide absorption exhaust gas is 9~11.
Wherein, in the integrated conduct method of above-mentioned form waste gas of sulfur dioxide, in step a, the quality of the sodium sulfite solution
Concentration is 10%~20%.Obtained sodium sulfite can be directly used for chlor-alkali, titanium sponge enterprise sewage except free chlorine use, together
When reduce costs.
Wherein, in the integrated conduct method of above-mentioned form waste gas of sulfur dioxide, in step b, the chlorine is waste chlorine, wherein chlorine
The volumetric concentration of gas is 5%~70%.In step b of the present invention, the exhaust gas after lye is absorbed is passed through waste chlorine system, utilizes
Hypochlorous strong oxidizing property preferably handles the sulfur dioxide in exhaust gas, to reduce sulfur dioxide in emission, reduces two
The discharge amount of sulfur oxide.The waste chlorine system is existing waste chlorine absorption treating device.
Wherein, in the integrated conduct method of above-mentioned form waste gas of sulfur dioxide, in step b, when absorption reaches end point requirements, and
Shi Genghuan soda bath, it is ensured that the assimilation effect of form waste gas of sulfur dioxide.
Wherein, in the integrated conduct method of above-mentioned form waste gas of sulfur dioxide, in step b, dissociate in the liquor natrii hypochloritis
Chlorinity is 6%~10%, also contains a small amount of sodium sulphate；Liquor natrii hypochloritis can be used for producing thimerosal.
Wherein, in the integrated conduct method of above-mentioned form waste gas of sulfur dioxide, in order to produce to obtain the Asia of low content calcium and magnesium impurity
Metabisulfite solution is preferably directly used as auxiliary material；Soda bath is prepared using pure water.
The present invention will further be elaborated by specific embodiment below.
Embodiment 1
Content of sulfur dioxide 0.5~5% in the form waste gas of sulfur dioxide of certain gas washing in SA production factory, form waste gas of sulfur dioxide is through gravity
Dust removal process collects exhaust gas, operating pressure -2~0KPa of condition using exhaust gas fan, and fan outlet pressure is 5~20KPa, defeated
It send to chlor-alkali enterprises；
Mass concentration is used to absorb titanium dioxide for 11% soda bath under the pressure conditions that absorption tower uses 0~5kpa
Sulphur exhaust gas, the pH value for controlling the absorption terminal of lye is 10~11, obtains sodium sulfite solution and alkali that mass concentration is 13%
Exhaust gas after liquid absorption；Sodium sulfite solution directly uses；Waste chlorine system is passed through in exhaust gas after lye is absorbed, -1.5
Under the operating condition of~-0.5kpa, the soda bath for being 17% with mass concentration absorbs on absorption tower, and it is to have that lye, which absorbs terminal,
Alkali is imitated less than 1%, processing obtains liquor natrii hypochloritis and the residual gas that free chlorine contents are 7%~9%, by residual gas pair
Idle discharge is put, and SO 2 in waste gas content is 34ppm.Liquor natrii hypochloritis is directly used in production thimerosal.
Embodiment 2
Content of sulfur dioxide 0.3~5% in the form waste gas of sulfur dioxide of certain gas washing in SA production factory, form waste gas of sulfur dioxide is through gravity
Dust removal process collects exhaust gas, operating pressure -1.8~0KPa of condition using exhaust gas fan, and fan outlet pressure is 5~20KPa,
It is delivered to titanium sponge production enterprise；
Mass concentration is used to absorb titanium dioxide for 15% soda bath under the pressure conditions that absorption tower uses 0~5kpa
Sulphur exhaust gas, the pH value for controlling the absorption terminal of lye is 9~11, obtains sodium sulfite solution and lye that mass concentration is 15%
Exhaust gas after absorption；Sodium sulfite solution directly uses；Exhaust gas after lye is absorbed is passed through waste chlorine system, -1.5~-
Under the operating condition of 0.5kpa, the soda bath for being 15% with mass concentration absorbs on absorption tower, and it is effective that lye, which absorbs terminal,
Alkali is less than 1%, and processing obtains liquor natrii hypochloritis and the residual gas that free chlorine contents are 7%~9%, by residual gas to sky
Discharge, SO 2 in waste gas content are 15ppm.Liquor natrii hypochloritis is directly used in production thimerosal.
Claims (9)
1. the integrated conduct method of form waste gas of sulfur dioxide, it is characterised in that include the following steps:
A, the form waste gas of sulfur dioxide for collecting gas washing in SA production factory, is delivered to absorption tower after dedusting, use mass concentration for 10%~
17% soda bath absorbs, the exhaust gas after obtaining sodium sulfite solution and lye absorption；
B, be passed through chlorine in the exhaust gas after being absorbed to lye and obtain mixed gas, by mixed gas mass concentration be 10%~
17% soda bath absorbs, and absorbing terminal is effective alkali content less than 1%；Absorption handles to obtain liquor natrii hypochloritis and remnants
Exhaust gas.
2. the integrated conduct method of form waste gas of sulfur dioxide according to claim 1, it is characterised in that: the sulfur dioxide is useless
The volumetric concentration of sulfur dioxide is 0.2%~10% in gas.
3. the integrated conduct method of form waste gas of sulfur dioxide according to claim 1 or 2, it is characterised in that: in step a, institute
The form waste gas of sulfur dioxide for stating collection gas washing in SA production factory uses tiny structure condition for -2~0KPa；Conveying uses positive press strip after dedusting
Part is 5~20KPa.
4. the integrated conduct method of described in any item form waste gas of sulfur dioxide according to claim 1~3, it is characterised in that: step a
In, using mass concentration for the absorption terminal of 10%~17% soda bath sulfur dioxide absorption exhaust gas is 9~11.
5. the integrated conduct method of form waste gas of sulfur dioxide according to any one of claims 1 to 4, it is characterised in that: step a
In, the mass concentration of the sodium sulfite solution is 10%~20%.
6. the integrated conduct method of described in any item form waste gas of sulfur dioxide according to claim 1~5, it is characterised in that: step b
In, the chlorine is waste chlorine；The volumetric concentration of chlorine is 5%~70%.
7. the integrated conduct method of described in any item form waste gas of sulfur dioxide according to claim 1~6, it is characterised in that: step b
In, when absorption reaches end point requirements, soda bath is replaced in time.
8. the integrated conduct method of described in any item form waste gas of sulfur dioxide according to claim 1~7, it is characterised in that: step b
In, free chlorine contents are 6%~10% in the liquor natrii hypochloritis.
9. the integrated conduct method of described in any item form waste gas of sulfur dioxide according to claim 1~8, it is characterised in that: described
Soda bath is prepared using pure water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811554657.7A CN109485072A (en) | 2018-12-18 | 2018-12-18 | The integrated conduct method of form waste gas of sulfur dioxide |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811554657.7A CN109485072A (en) | 2018-12-18 | 2018-12-18 | The integrated conduct method of form waste gas of sulfur dioxide |
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| CN109485072A true CN109485072A (en) | 2019-03-19 |
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| CN201811554657.7A Pending CN109485072A (en) | 2018-12-18 | 2018-12-18 | The integrated conduct method of form waste gas of sulfur dioxide |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110639337A (en) * | 2019-11-01 | 2020-01-03 | 武汉青江化工黄冈有限公司 | SO based on sulphuric acid apparatus for producing2Wet gas extraction process |
| CN110947297A (en) * | 2019-12-23 | 2020-04-03 | 中国科学院青海盐湖研究所 | Green treatment method for chlorine-containing waste gas |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54120280A (en) * | 1978-03-13 | 1979-09-18 | Mitsubishi Heavy Ind Ltd | Treating method for exhaust gas |
| CN1358560A (en) * | 2000-12-20 | 2002-07-17 | 贵研铂业股份有限公司 | Purifying process for sulfur dioxide waste gas |
| CN101757845A (en) * | 2008-11-18 | 2010-06-30 | 熊长宏 | Method for treating sulphur dioxide flue gas |
-
2018
- 2018-12-18 CN CN201811554657.7A patent/CN109485072A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54120280A (en) * | 1978-03-13 | 1979-09-18 | Mitsubishi Heavy Ind Ltd | Treating method for exhaust gas |
| CN1358560A (en) * | 2000-12-20 | 2002-07-17 | 贵研铂业股份有限公司 | Purifying process for sulfur dioxide waste gas |
| CN101757845A (en) * | 2008-11-18 | 2010-06-30 | 熊长宏 | Method for treating sulphur dioxide flue gas |
Non-Patent Citations (1)
| Title |
|---|
| 吕继奎主编: "《化工环保概论》", 30 June 1995, 化学工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110639337A (en) * | 2019-11-01 | 2020-01-03 | 武汉青江化工黄冈有限公司 | SO based on sulphuric acid apparatus for producing2Wet gas extraction process |
| CN110639337B (en) * | 2019-11-01 | 2024-03-26 | 武汉青江化工黄冈有限公司 | SO based on sulfuric acid apparatus for producing 2 Wet gas extraction process |
| CN110947297A (en) * | 2019-12-23 | 2020-04-03 | 中国科学院青海盐湖研究所 | Green treatment method for chlorine-containing waste gas |
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Application publication date: 20190319 |