CN204865499U - Methyl nitrite's waste gas treatment system - Google Patents
Methyl nitrite's waste gas treatment system Download PDFInfo
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- CN204865499U CN204865499U CN201520474747.0U CN201520474747U CN204865499U CN 204865499 U CN204865499 U CN 204865499U CN 201520474747 U CN201520474747 U CN 201520474747U CN 204865499 U CN204865499 U CN 204865499U
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Abstract
The utility model relates to a tail gas field of retrieving, concretely relates to waste gas treatment system. A methyl nitrite's waste gas treatment system, includes the caustic wash tower, and the caustic wash tower is equipped with the solution import at top, the solution export of bottom, the waste gas import of lower part, the exhaust outlet at top, still includes the solution mixer, and the top of solution mixer is equipped with import of ethanolamine solution and sodium carbonate solution import, and the bottom of blender is equipped with mixer outlet, and mixer outlet connects the solution import of caustic wash tower. Due to the adoption of the technical scheme, the utility model provides a contain the environmental pollution problem of methyl nitrite's tail gas existence, can improve batch processing efficiency, simultaneously the utility model has the advantages of environmental protection, rate of recovery height.
Description
Technical field
The utility model relates to tail gas recycle field, is specifically related to a kind of exhaust treatment system.
Background technology
Industrial utilization during nitrite displacement method production nitromethane produces with methyl nitrite.Current this tail gas of more factory processes adopts direct alkaline cleaner, namely soda ash and methyl nitrite is utilized to react Formed dimethyl phthalate and natrium nitrosum, owing to reacting incomplete, the unreacted methyl nitrite waste gas instability of part is decomposed generation nitrogen oxide and causes nitrogen oxide severe overweight.Also have part factory to adopt incinerator and alkaline cleaner combined type to process, but this processing mode will cause comparatively serious wastage of material problem, and processing cost is higher.
Utility model content
The purpose of this utility model is, provides a kind of exhaust treatment system of methyl nitrite, solves above technical problem.
The technical problem that the utility model solves can realize by the following technical solutions:
A kind of exhaust treatment system of methyl nitrite, comprise caustic wash tower, described caustic wash tower is provided with solution inlet port, the taphole of bottom, the exhaust gas inlet of bottom, the waste gas outlet at top at top, also comprise a solution mixer, the top of described solution mixer is provided with ethanolamine solutions import and sodium carbonate liquor import, the bottom of described blender is provided with mixer outlet, and described mixer outlet connects the solution inlet port of described caustic wash tower.
When the utility model uses, ethanolamine solutions and sodium carbonate liquor enter in blender, obtain sodium carbonate monoethanolamine mixed solution, and the sodium carbonate monoethanolamine mixed solution of mixer outlet connects the top solution inlet port of caustic wash tower by pipeline.Pending waste gas passes into from the exhaust gas inlet below caustic wash tower, and the gas after caustic wash tower alkali cleaning flows out, discharged to air from the waste gas outlet at caustic wash tower top.The solution formed after the sodium carbonate monoethanolamine mixed solution absorption waste gas that caustic wash tower top flows into flows out from the taphole bottom caustic wash tower.The utility model, using monoethanolamine as cosolvent, increases the dissolubility of sodium carbonate liquor and methyl nitrite solution, improves sodium carbonate liquor and methyl nitrite reaction efficiency, impels alkali cleaning abundant, solves the problem of environmental pollution that methyl nitrite waste gas exists.
In order to solve the different methyl nitrite waste gas of concentration, caustic wash tower of the present utility model can be provided with multiple according to pending tail gas concentration:
Described caustic wash tower is at least two, at least two described caustic wash towers connect successively, namely the waste gas outlet of previous caustic wash tower connects the exhaust gas inlet of a rear caustic wash tower, the exhaust gas inlet of first caustic wash tower connects external exhaust gas pipeline, the waste gas outlet UNICOM atmosphere outside of last caustic wash tower;
Described mixer outlet connects the solution inlet port of caustic wash tower described in each respectively.User can the exhaust gas concentration of alkali cleaning as required, and arrange multiple caustic wash tower, such waste gas carries out an alkali cleaning incessantly, but repeatedly, ensures that the gas discharged to atmosphere outside is pollution-free, achieve environmental protection object.
Also comprise a quantizer, the taphole of all described caustic wash towers all connects the import of described quantizer, the import of organic layer outlet connection first liquid collecting tank of described quantizer, the import of water layer outlet connection second liquid collecting tank of described quantizer;
The outlet of described first liquid collecting tank connects the import of rectifying column, and the top of described rectifying column is provided with dimethyl carbonate outlet, and the monoethanolamine outlet of described rectifier bottoms connects the ethanolamine solutions import of described blender;
The outlet of described second liquid collecting tank connects the import of destilling tower, the monoethanolamine outlet at described destilling tower top connects the ethanolamine solutions import of described blender, outlet bottom described destilling tower is waste liquid outlet, next workshop section's wastewater treatment can be arrived, also can the utility in waste liquid be recycled.The solution that multiple caustic wash tower is discharged is focused on quantizer and carries out layering by the utility model, and obtain organic layer and water layer after quantizer layering, wherein organic layer enters the first liquid collecting tank, and water layer enters the second liquid collecting tank.Flow through the organic layer after the first liquid collecting tank and realize being separated of monoethanolamine and dimethyl carbonate at rectifying column, wherein rectifying column top obtains dimethyl carbonate, and the monoethanolamine that outlet at bottom obtains is connected with ethanolamine solutions import by pipeline.Flow through the monoethanolamine that the water layer after the second liquid collecting tank distillates at destilling tower top to be connected with ethanolamine solutions import by pipeline, the solution bottom destilling tower carries out wastewater treatment or recycling.The utility model can not only solve the problem of environmental pollution that the tail gas containing methyl nitrite exists, and recyclable raw material, reduces costs simultaneously.
Beneficial effect: owing to adopting technique scheme, the utility model solves the problem of environmental pollution that methyl nitrite tail gas exists, and improves batch process efficiency, and the utility model has environmental protection, rate of recovery advantages of higher simultaneously.
Accompanying drawing explanation
Fig. 1 is a kind of overall structure schematic diagram of the present utility model.
Detailed description of the invention
The technological means realized to make the utility model, creation characteristic, reaching object and effect is easy to understand, setting forth the utility model further below in conjunction with concrete diagram.
With reference to Fig. 1, a kind of exhaust treatment system of methyl nitrite, comprise caustic wash tower, caustic wash tower is provided with solution inlet port, the taphole of bottom, the exhaust gas inlet of bottom, the waste gas outlet at top at top, in order to solve the pending waste gas of different component concentration, caustic wash tower of the present utility model can be provided with multiple, as shown in fig. 1, for 2 caustic wash towers, be respectively caustic wash tower 2 and caustic wash tower 3.
Also comprise solution mixer 1, the top of solution mixer 1 is provided with ethanolamine solutions import and sodium carbonate liquor import, and the bottom of blender 1 is provided with mixer outlet, and mixer outlet connects the solution inlet port of caustic wash tower 2 and caustic wash tower 3 respectively.The taphole of caustic wash tower 2, the taphole of caustic wash tower 3 connect quantizer 4 respectively.The exhaust gas entrance of caustic wash tower 2 connects external exhaust gas pipeline, and the waste gas outlet of caustic wash tower 2 connects the exhaust gas entrance of caustic wash tower 3, the waste gas outlet UNICOM atmosphere outside of caustic wash tower 3.The import of organic layer outlet connection first liquid collecting tank 5 of quantizer 4, the import of water layer outlet connection second liquid collecting tank 6 of quantizer 4.The outlet of the first liquid collecting tank 5 connects the import of rectifying column 7, and the top of rectifying column 7 is provided with dimethyl carbonate outlet, and the monoethanolamine outlet bottom rectifying column 7 connects the ethanolamine solutions import of blender 1.The outlet of the second liquid collecting tank 6 connects the import of destilling tower 8, the monoethanolamine outlet at destilling tower 8 top connects the ethanolamine solutions import of blender 1, outlet bottom destilling tower 8 is waste liquid outlet, can arrive next workshop section and carry out wastewater treatment, also can recycle the utility in waste liquid.
When the utility model uses, ethanolamine solutions and sodium carbonate liquor enter in blender 1, obtain sodium carbonate monoethanolamine mixed solution, and the sodium carbonate monoethanolamine mixed solution of mixer outlet connects the top solution inlet port of caustic wash tower 2 and caustic wash tower 3 respectively by pipeline.Pending waste gas passes into from the exhaust gas inlet below caustic wash tower 2, is not yet entered by the below exhaust gas inlet of the waste gas of abundant alkali cleaning by caustic wash tower 3, carries out second time alkali cleaning.Waste gas flows out, discharged to air from the waste gas outlet at caustic wash tower 3 top through the abundant reacted gas of alkali cleaning of caustic wash tower 3.
The solution formed after the sodium carbonate monoethanolamine mixed solution absorption waste gas that caustic wash tower 2 top flows into flows to quantizer from the taphole bottom caustic wash tower 2, and the dimethyl carbonate ethanolamine solutions formed after the sodium carbonate monoethanolamine mixed solution absorption waste gas that caustic wash tower 3 top flows into flows to quantizer from the taphole bottom caustic wash tower 3.In quantizer 4, solution obtains organic layer and water layer after carrying out layering, and wherein organic layer enters the first liquid collecting tank 5, and water layer enters the second liquid collecting tank 6.Flow through the organic layer after the first liquid collecting tank 5 and realize being separated of monoethanolamine and dimethyl carbonate at rectifying column 7, wherein rectifying column 7 top obtains dimethyl carbonate, and the monoethanolamine that outlet at bottom obtains is connected with ethanolamine solutions import by pipeline.Flow through the monoethanolamine that the water layer after the second liquid collecting tank 6 distillates at destilling tower 8 top to be connected with ethanolamine solutions import by pipeline, the solution bottom destilling tower 8 carries out wastewater treatment or recycling.
More than show and describe general principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. the exhaust treatment system of a methyl nitrite, comprise caustic wash tower, described caustic wash tower is provided with solution inlet port, the taphole of bottom, the exhaust gas inlet of bottom, the waste gas outlet at top at top, it is characterized in that, also comprise a solution mixer, the top of described solution mixer is provided with ethanolamine solutions import and sodium carbonate liquor import, and the bottom of described blender is provided with mixer outlet, and described mixer outlet connects the solution inlet port of described caustic wash tower.
2. the exhaust treatment system of a kind of methyl nitrite according to claim 1, it is characterized in that, described caustic wash tower is at least two, at least two described caustic wash towers connect successively, namely the waste gas outlet of previous caustic wash tower connects the exhaust gas entrance of a rear caustic wash tower, the exhaust gas inlet of first caustic wash tower connects external exhaust gas pipeline, the waste gas outlet UNICOM atmosphere outside of last caustic wash tower;
Described mixer outlet connects the solution inlet port of caustic wash tower described in each respectively.
3. the exhaust treatment system of a kind of methyl nitrite according to claim 1 and 2, it is characterized in that, also comprise a quantizer, described in each, the taphole of caustic wash tower connects the import of described quantizer, the import of organic layer outlet connection first liquid collecting tank of described quantizer, the import of water layer outlet connection second liquid collecting tank of described quantizer;
The outlet of described first liquid collecting tank connects the import of rectifying column, and the top of described rectifying column is provided with dimethyl carbonate outlet, and the monoethanolamine outlet of described rectifier bottoms connects the ethanolamine solutions import of described blender;
The outlet of described second liquid collecting tank connects the import of destilling tower, and the monoethanolamine outlet at described destilling tower top connects the ethanolamine solutions import of described blender, and the outlet bottom described destilling tower connects for waste liquid outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201520474747.0U CN204865499U (en) | 2015-06-30 | 2015-06-30 | Methyl nitrite's waste gas treatment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520474747.0U CN204865499U (en) | 2015-06-30 | 2015-06-30 | Methyl nitrite's waste gas treatment system |
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| CN204865499U true CN204865499U (en) | 2015-12-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105688608A (en) * | 2016-02-19 | 2016-06-22 | 宁波金远东石化工程技术有限公司 | Method for removing acid gas and moisture in outlet gas of esterification part and device of method |
| CN114602311A (en) * | 2020-12-08 | 2022-06-10 | 湖北远大富驰医药化工股份有限公司 | Method for circularly preparing nitromethane |
| CN114602302A (en) * | 2020-12-08 | 2022-06-10 | 湖北富博化工有限责任公司 | Nitromethane tail gas resource treatment method |
-
2015
- 2015-06-30 CN CN201520474747.0U patent/CN204865499U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105688608A (en) * | 2016-02-19 | 2016-06-22 | 宁波金远东石化工程技术有限公司 | Method for removing acid gas and moisture in outlet gas of esterification part and device of method |
| CN105688608B (en) * | 2016-02-19 | 2018-04-10 | 宁波金远东石化工程技术有限公司 | Purify the method and its device of sour gas and moisture in esterification portion exit gas |
| CN114602311A (en) * | 2020-12-08 | 2022-06-10 | 湖北远大富驰医药化工股份有限公司 | Method for circularly preparing nitromethane |
| CN114602302A (en) * | 2020-12-08 | 2022-06-10 | 湖北富博化工有限责任公司 | Nitromethane tail gas resource treatment method |
| CN114602302B (en) * | 2020-12-08 | 2023-08-08 | 湖北富博化工有限责任公司 | Nitromethane tail gas recycling treatment method |
| CN114602311B (en) * | 2020-12-08 | 2023-11-07 | 湖北远大富驰医药化工股份有限公司 | Method for circularly preparing nitromethane |
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