CN213286230U - Industrial tail gas methanol extraction system - Google Patents
Industrial tail gas methanol extraction system Download PDFInfo
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- CN213286230U CN213286230U CN202020746373.4U CN202020746373U CN213286230U CN 213286230 U CN213286230 U CN 213286230U CN 202020746373 U CN202020746373 U CN 202020746373U CN 213286230 U CN213286230 U CN 213286230U
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Abstract
The utility model provides an industry tail gas methyl alcohol extraction system that can draw methyl alcohol in the tail gas, including nitrogen buffer tank, nitrogen gas air-blower, nitrogen gas cooler, mellow wine nitrogen knockout drum, wherein, the nitrogenous feed gas get into extremely the nitrogen buffer tank, nitrogen gas buffer tank top gas vent pass through the nitrogen gas air-blower with nitrogen gas cooler access connection, the nitrogen gas cooler export with the mellow wine knockout drum is connected, nitrogen alcohol knockout drum top gas outlet is the exhaust gas vent, and export of nitrogen alcohol knockout drum bottom condensate is the export of methyl alcohol finished product.
Description
Technical Field
The utility model relates to a tail gas treatment technical field in the carbonic ester production especially relates to an industry tail gas methyl alcohol extraction system.
Background
In a carbonate preparation system, tail gas generated in the production process contains a large amount of high-pollution and toxic gases such as nitrogen, methanol and the like, and the nitrogen, the methanol and the like in the tail gas are common industrial raw materials, so that the problem of tail gas emission pollution can be reduced if the nitrogen and the methanol in the tail gas are extracted and treated, and economic benefits can be brought to production enterprises.
Disclosure of Invention
The utility model aims to overcome the not enough of prior art, adapt to the actual needs, provide an industry tail gas methyl alcohol extraction system.
In order to realize the utility model discloses a purpose, the utility model discloses the technical scheme who adopts does:
the design provides an industry tail gas methyl alcohol extraction system, including nitrogen buffer tank, nitrogen gas air-blower, nitrogen gas cooler, mellow wine nitrogen knockout drum, wherein, the nitrogen-containing feed gas gets into extremely the nitrogen buffer tank, nitrogen gas buffer tank top gas vent passes through the nitrogen gas air-blower with nitrogen gas cooler access connection, the nitrogen gas cooler export with the mellow wine knockout drum is connected, mellow wine knockout drum top gas outlet is the exhaust gas mouth, and the export of mellow wine knockout drum bottom condensate is the export of methyl alcohol finished product.
And a condensate outlet at the bottom of the nitrogen-alcohol separation tank is connected with an alcohol mixed liquid pump, and the alcohol mixed liquid pump is connected with a methanol storage tank.
And an exhaust port at the top of the nitrogen-alcohol separation tank is connected with an air inlet of the catalytic combustion device.
And a liquid outlet at the bottom of the nitrogen buffer tank is connected with the liquid collection tank.
And an inlet of a heat exchange tube in the nitrogen cooler is connected with a liquid ammonia supply source, and an outlet of the heat exchange tube in the nitrogen cooler is connected with the low-pressure ammonia separation tank.
The beneficial effects of the utility model reside in that:
the industrial tail gas methanol extraction system is simple in composition structure and easy to realize, methanol in tail gas can be extracted in the tail gas treatment system, the problem of direct emission pollution of the tail gas is solved, and meanwhile, the economic benefit of an enterprise can be improved.
Drawings
Fig. 1 is a schematic diagram of the main principle of the present invention.
Detailed Description
The invention will be further described with reference to the following figures and examples:
example 1: an industrial tail gas methanol extraction system, see figure 1.
Including nitrogen buffer tank V702, nitrogen blower C701, nitrogen gas cooler E701, mellow wine nitrogen knockout drum V701, wherein, the nitrogen-containing feed gas enters into nitrogen buffer tank V702, nitrogen buffer tank V702 top gas vent passes through nitrogen blower C701 with nitrogen gas cooler E701 access connection, nitrogen gas cooler E701 export with nitrogen alcohol knockout drum V701 is connected, nitrogen alcohol knockout drum V701 top gas outlet is exhaust gas vent and is connected with catalytic combustion device X801, tail gas evacuation after its catalytic combustion device X801 burns, its nitrogen alcohol knockout drum V701 bottom condensate export be the export of methyl alcohol finished product and through mellow wine liquid mixture pump P701 with be connected with the methyl alcohol storage tank, mellow wine mixed liquid pump export 704 discharges industrial grade methyl alcohol and can use as industrial raw materials.
Further, a liquid outlet at the bottom of the nitrogen buffer tank V702 is connected with the liquid collection tank V903, a submerged pump P901 is arranged in the liquid collection tank V903, and the submerged pump P901 discharges condensate in the liquid collection tank to an external system through a liquid discharge pipe 904 connected with the submerged pump P901 for water treatment.
Further, an inlet 4301 of a heat exchange tube in the nitrogen cooler E701 is connected with a liquid ammonia supply source, and an outlet 3401 of the heat exchange tube in the nitrogen cooler E701 is connected with a low-pressure ammonia separation tank.
The working principle of the precooling system is as follows:
the system is described by taking the example of extracting methanol from tail gas in the production of carbonic ester.
As shown in FIG. 1, the nitrogen-containing feed gas has the following components:
| name (R) | N2 | CH3OH | ALLYL-01 | PROPA-01 | 1-MET-01 |
| Volume fraction | 95％ | 3％ | 0.5％ | 0.5％ | 1％ |
Simultaneously, the nitrogen feed gas with the following components can be filled:
| name (R) | N2 | CH3OH | DIMET-01 | DIMET-02 | H2O | ETHAN-01 | ETHYL-01 |
| Volume fraction | 99.85％ | 0.07％ | 0.03％ | 75PPM | 0.014％ | 90PPM | 0.03％ |
The temperature of the two raw material gases is 15 ℃ and 3KP, the two raw material gases enter the nitrogen buffer tank through the air inlet pipe 702, and the liquid in the nitrogen buffer tank enters the liquid collecting tank and is discharged to an external system through a submerged pump in the liquid collecting tank for water treatment.
The gas discharged from the nitrogen buffer tank enters a nitrogen cooler through a nitrogen blower, an inlet 4301 and an outlet 3401 of a heat exchange tube in the nitrogen cooler are respectively connected with a liquid outlet of low-pressure ammonia and an air inlet of the low-pressure ammonia, liquid ammonia enters the nitrogen cooler through the inlet 4301, the low-pressure ammonia discharged from the nitrogen cooler enters the low-pressure ammonia again through the outlet 3401 to form circulation, the liquid treated by the nitrogen cooler enters an alcohol-nitrogen separation tank for gas-liquid separation, the gas separated by the alcohol-nitrogen separation tank enters a catalytic combustion device for combustion, the combusted waste gas is evacuated through an exhaust pipe 801, the liquid separated by the alcohol-nitrogen separation tank is industrial-grade methanol and is discharged through a discharge port 704 of an alcohol mixing pump, the temperature of the discharged alcohol mixture is-25 ℃ and 3kPa, wherein the temperature of the methanol is 35.27%, the propylene glycol is 11.78%, the propylene glycol is 15.72%, the dimethyl carbonate is 0.31%, and the like, 36.35 percent of 1-methoxy-2-propanol, 0.04 percent of water, 0.06 percent of ethanol and 0.47 percent of 3-methylpropanoic acid, so that the extraction of methanol can be completed.
The embodiment of the present invention discloses a preferred embodiment, but not limited thereto, and those skilled in the art can easily understand the spirit of the present invention according to the above embodiment, and make different extensions and changes, but do not depart from the spirit of the present invention, all of which are within the protection scope of the present invention.
Claims (5)
1. The utility model provides an industrial tail gas methanol extraction system which characterized in that: including nitrogen buffer tank, nitrogen gas air-blower, nitrogen gas cooler, mellow wine nitrogen knockout drum, wherein, the nitrogen-containing feed gas enters into extremely the nitrogen buffer tank, nitrogen gas buffer tank top gas vent passes through the nitrogen gas air-blower with nitrogen gas cooler access connection, the nitrogen gas cooler export with the mellow wine knockout drum is connected, mellow wine knockout drum top gas outlet is the exhaust gas mouth, and the export of mellow wine knockout drum bottom condensate is the export of methyl alcohol finished product.
2. The industrial tail gas methanol extraction system of claim 1, wherein: and a condensate outlet at the bottom of the nitrogen-alcohol separation tank is connected with an alcohol mixed liquid pump, and the alcohol mixed liquid pump is connected with a methanol storage tank.
3. The industrial tail gas methanol extraction system of claim 1, wherein: and an exhaust port at the top of the nitrogen-alcohol separation tank is connected with an air inlet of the catalytic combustion device.
4. The industrial tail gas methanol extraction system of claim 1, wherein: and a liquid outlet at the bottom of the nitrogen buffer tank is connected with the liquid collection tank.
5. The industrial tail gas methanol extraction system of claim 1, wherein: and an inlet of a heat exchange tube in the nitrogen cooler is connected with a liquid ammonia supply source, and an outlet of the heat exchange tube in the nitrogen cooler is connected with the low-pressure ammonia separation tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020746373.4U CN213286230U (en) | 2020-05-08 | 2020-05-08 | Industrial tail gas methanol extraction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020746373.4U CN213286230U (en) | 2020-05-08 | 2020-05-08 | Industrial tail gas methanol extraction system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213286230U true CN213286230U (en) | 2021-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020746373.4U Active CN213286230U (en) | 2020-05-08 | 2020-05-08 | Industrial tail gas methanol extraction system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213286230U (en) |
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2020
- 2020-05-08 CN CN202020746373.4U patent/CN213286230U/en active Active
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