CN215388517U - Device for improving recovery rate of dimethyl carbonate device tail gas materials - Google Patents
Device for improving recovery rate of dimethyl carbonate device tail gas materials Download PDFInfo
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- CN215388517U CN215388517U CN202121401777.0U CN202121401777U CN215388517U CN 215388517 U CN215388517 U CN 215388517U CN 202121401777 U CN202121401777 U CN 202121401777U CN 215388517 U CN215388517 U CN 215388517U
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- tail gas
- carbon dioxide
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- dimethyl carbonate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The utility model relates to a device for improving the recovery rate of materials in tail gas of a dimethyl carbonate device. The technical scheme is as follows: the lower extreme of tail gas buffer tank passes through the pipe connection tail gas precooler, and the output of tail gas precooler passes through the pipe connection to compressor, and the tail gas after the compression passes through the import of pipe connection to condenser, and the import of pipe connection cooling separator is passed through to the export of condenser, and the export of cooling separator passes through the pipe connection to rectifying column feed inlet, and the discharge gate of rectifying column passes through the pipe connection to the liquefier, and the output of liquefier passes through the pipe connection to carbon dioxide product storage tank. The beneficial effects are that: the liquid carbon dioxide is purified and recovered after precooling separation, compression, cooling separation and rectification, the method conforms to the national standard of the existing food carbon dioxide, and compared with the prior art, the method has a simple structure, is directed at the Propylene Carbonate (PC) working section with the maximum tail gas yield in the whole process flow, and is realized by arranging a precooler in front of a compressor.
Description
Technical Field
The utility model relates to a production auxiliary device of a dimethyl carbonate device, in particular to a device for improving the recovery rate of materials in tail gas of the dimethyl carbonate device.
Background
Dimethyl carbonate (Dimethyl carbonate) is a harmless chemical and an organic green solvent accepted by the chemical industry, is widely applied to the industries of paint, medicine, electrolyte and pesticide at home, currently, CO2 and epoxypropane are mainly used as raw materials in the industry for ester exchange synthesis, the tail gas yield of a Propylene Carbonate (PC) working section in the whole process flow is the largest, CO2 accounts for more than 90%, and the original treatment mode is direct emission. The development direction of green and low carbon becomes a great trend in the world, and the design of a device for improving the recovery rate of the tail gas material of the dimethyl carbonate device is particularly important for actively responding to the low carbon development target determined by the thirteen-five planning outline.
The Chinese patent document with the publication number of CN212893939U and the patent name of carbon dioxide recovery device in the production of dimethyl carbonate is filed in 6-19.2020 of Shandong Shi Da Sheng Hua chemical group, Inc., and the technical scheme is as follows: the carbon dioxide buffer tank is connected to the knockout drum before the carbon dioxide compression after the precooling, after being connected to the carbon dioxide compressor after the separator through compression condensation, is reconnected to and takes off heavy tower, the top of taking off heavy tower is connected to through the second condenser and takes off after heavy carbon dioxide buffer tank, and after being connected to and takes off light tower, the bottom of taking off light tower is connected to food level carbon dioxide storage tank through the outward pump, the top of taking off light tower is connected the waste gas storage tank after through the condensation, and the catalytic incineration device is connected to the exit end of waste gas storage tank. It has the problems that: the heavy component removal tower and the light component removal tower are adopted, the structure is complex, and the components are complex because the heavy component removal tower and the light component removal tower are not only used for treating tail gas in a PC section, but also used for treating a large amount of tail gas in a dimethyl carbonate (DMC) section and a Propylene Glycol (PG) section.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art, and provides a device for improving the material recovery rate of tail gas of a dimethyl carbonate device, which is used for treating the tail gas of a Propylene Carbonate (PC) working section of the dimethyl carbonate device and has high efficiency and simple structure.
The utility model provides a device for improving recovery rate of dimethyl carbonate device tail gas materials, which adopts the technical scheme that: the device comprises a tail gas buffer tank (1), a tail gas precooler (2), a compressor (3), a condenser (4), a cooling separator (5), a rectifying tower (6), a liquefier (7) and a carbon dioxide product storage tank (8), wherein the lower end of the tail gas buffer tank (1) is connected with the tail gas precooler (2) through a pipeline, the output end of the tail gas precooler (2) is connected with the compressor (3) through a pipeline, the compressed tail gas is connected with the inlet of the condenser (4) through a pipeline, the outlet of the condenser (4) is connected with the inlet of the cooling separator (5) through a pipeline, the outlet of the cooling separator (5) is connected with the feed inlet of the rectifying tower (6) through a pipeline, the discharge outlet of the rectifying tower (6) is connected with the liquefier (7) through a pipeline, and the output end of the liquefier (7) is connected with the carbon dioxide product storage tank (8) through a pipeline.
Preferably, foretell rectifying column (6) include feed inlet (6.1), filter plate (6.2), transfer line (6.3), heater (6.4), liquid carbon dioxide (6.5), discharge gate (6.6), tower body (6.7), upper cover (6.8), the top of tower body (6.7) be equipped with curved upper cover (6.8), the bottom is equipped with heater (6.4), is equipped with feed inlet (6.1) in one side of tower body (6.7), the opposite side is equipped with discharge gate (6.6), is equipped with filter plate (6.2) and transfer line (6.3) at the inner chamber of tower body (6.7).
Preferably, more than one filter plate (6.2) is arranged and is positioned in the middle-upper part of the inner cavity of the tower body (6.7).
Preferably, the infusion tube (6.3) is vertically arranged and is communicated with more than one filter plate (6.2).
Preferably, the top of the upper cover (6.8) is provided with a pressure pump (6.9).
The utility model has the beneficial effects that: the utility model improves the recovery rate of the tail gas material of the dimethyl carbonate device, especially purifies the tail gas CO2 of the PC working section of propylene carbonate as the raw material for recycling, purifies and recovers liquid carbon dioxide after precooling separation, compression, cooling separation and rectification, conforms to the current national standard of food carbon dioxide, greatly reduces the production and operation cost compared with the traditional solvent absorption method, membrane separation method and the like, reduces the energy consumption, improves the recovery rate, simultaneously reduces the carbon emission, and conforms to the current concepts of environmental protection and sustainable development; compared with the prior art, the structure is simple, the precooler is arranged in front of the compressor aiming at the Propylene Carbonate (PC) working section with the maximum tail gas yield in the whole process flow, so that the problem of tail gas emission is effectively solved, and the energy is saved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the structure of one embodiment of a rectification column;
in the upper diagram: the system comprises a tail gas buffer tank 1, a tail gas precooler 2, a compressor 3, a condenser 4, a cooling separator 5, a rectifying tower 6, a liquefier 7 and a carbon dioxide product storage tank 8;
a feed inlet 6.1, a filter plate 6.2, a liquid conveying pipe 6.3, a heater 6.4, liquid carbon dioxide 6.5, a discharge port 6.6, a tower body 6.7, an upper cover 6.8, a booster pump 6.9 and a condensation liquefier 6.10.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
When the utility model is used, the temperature of tail gas entering the tail gas buffer tank 1 at the propylene carbonate PC working section is 15 ℃, in order to prolong the service life of the compressor 3, reduce the compression power consumption and simultaneously primarily separate the mixture, the tail gas precooler 2 is arranged, and the carbon dioxide temperature is reduced to-5 ℃ and then enters the compressor 3 to be compressed and pressurized to 2.5 Mpa. The compressed gas enters a condenser 4, the cooled gas enters a cooling separator 5 for separation, the separated light component carbon dioxide gas is continuously treated by a low-temperature rectifying tower, and alcohol, ether, heavy hydrocarbon, water and peculiar smell in the step can be removed. The carbon dioxide gas after the low-temperature rectification treatment is condensed into liquid in the liquefier and enters the carbon dioxide product storage tank 8 through the control of the regulating valve group. The purity of the liquid carbon dioxide purified and recovered by the device is more than or equal to 99.995 percent, meets the national food-grade carbon dioxide requirement, and can completely meet the self-service requirement.
The difference from the embodiment 1 is that: the rectifying tower 6 adopted by the embodiment comprises a feeding hole 6.1, a filter plate 6.2, a liquid conveying pipe 6.3, a heater 6.4, liquid carbon dioxide 6.5, a discharging hole 6.6, a tower body 6.7 and an upper cover 6.8, wherein the top of the tower body 6.7 is provided with the arc-shaped upper cover 6.8, the bottom of the tower body is provided with the heater 6.4, one side of the tower body 6.7 is provided with the feeding hole 6.1, the other side of the tower body is provided with the discharging hole 6.6, and the inner cavity of the tower body 6.7 is provided with the filter plate 6.2 and the liquid conveying pipe 6.3.
More than one filter plate 6.2 is arranged and positioned at the middle-upper part of the inner cavity of the tower body 6.7.
The infusion tube 6.3 is arranged in the vertical direction and is communicated with more than one filter plate 6.2.
The top of foretell upper cover 6.8 is equipped with force (forcing) pump 6.9, and the force (forcing) pump passes through pipe connection condensation liquefier 6.10, and the top of condensation liquefier 6.10 is equipped with the waste gas mouth, can be with desorption such as light component, and the purity of the liquid carbon dioxide who returns to the tower body constantly promotes, finally reaches the requirement of food level.
When the tail gas pre-cooler is used, the temperature of tail gas entering the tail gas buffer tank 1 at the propylene carbonate PC working section is 15 ℃, in order to prolong the service life of the compressor 3 and reduce the compression power consumption and simultaneously primarily separate a mixture, the tail gas pre-cooler 2 is arranged, the temperature of carbon dioxide is reduced to-5 ℃, and then the carbon dioxide enters the compressor 3 to be compressed and pressurized to 2.5 Mpa. The compressed gas enters a condenser 4, the cooled gas enters a cooling separator 5 for separation, the separated light component carbon dioxide gas is continuously treated by a low-temperature rectifying tower, and alcohol, ether, heavy hydrocarbon, water and peculiar smell in the step can be removed. Wherein, liquid carbon dioxide enters into the tower body through feed inlet 6.1 in, flow to the lower part of tower body along the infusion pipe, be equipped with the heater at the tower body downside, make liquid become gaseous rising, through more than one filter plate, assemble the curved upper cover at top, rethread booster pump send to condensation liquefier 6.10, realize the further desorption of light component, liquid carbon dioxide can be rethread feed inlet 6.1 and send to in the tower body, continue circulation rectification, until reaching the food grade requirement, rethread discharge gate 6.6 outputs, carbon dioxide product storage tank 8 is carried to rethread liquefier 7.
The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solution described above. Therefore, any simple modifications or equivalent changes made according to the technical solution of the present invention shall fall within the scope of the present invention as claimed.
Claims (5)
1. The utility model provides an improve device of dimethyl carbonate device tail gas material recovery rate, characterized by: the device comprises a tail gas buffer tank (1), a tail gas precooler (2), a compressor (3), a condenser (4), a cooling separator (5), a rectifying tower (6), a liquefier (7) and a carbon dioxide product storage tank (8), wherein the lower end of the tail gas buffer tank (1) is connected with the tail gas precooler (2) through a pipeline, the output end of the tail gas precooler (2) is connected with the compressor (3) through a pipeline, the compressed tail gas is connected with the inlet of the condenser (4) through a pipeline, the outlet of the condenser (4) is connected with the inlet of the cooling separator (5) through a pipeline, the outlet of the cooling separator (5) is connected with the feed inlet of the rectifying tower (6) through a pipeline, the discharge outlet of the rectifying tower (6) is connected with the liquefier (7) through a pipeline, and the output end of the liquefier (7) is connected with the carbon dioxide product storage tank (8) through a pipeline.
2. The apparatus of claim 1, wherein the apparatus for increasing recovery rate of dimethyl carbonate tail gas material comprises: rectifying column (6) including feed inlet (6.1), filter plate (6.2), transfer line (6.3), heater (6.4), liquid carbon dioxide (6.5), discharge gate (6.6), tower body (6.7), upper cover (6.8), the top of tower body (6.7) be equipped with curved upper cover (6.8), the bottom is equipped with heater (6.4), be equipped with feed inlet (6.1) in one side of tower body (6.7), the opposite side is equipped with discharge gate (6.6), be equipped with filter plate (6.2) and transfer line (6.3) in the inner chamber of tower body (6.7).
3. The apparatus of claim 2, wherein the apparatus for increasing recovery rate of dimethyl carbonate tail gas material comprises: more than one filter plate (6.2) is arranged and is positioned at the middle-upper part of the inner cavity of the tower body (6.7).
4. The apparatus of claim 2 or 3, wherein the apparatus for increasing recovery rate of dimethyl carbonate tail gas material is characterized in that: the infusion tube (6.3) is arranged in the vertical direction and is communicated with more than one filter plate (6.2).
5. The apparatus of claim 2, wherein the apparatus for increasing recovery rate of dimethyl carbonate tail gas material comprises: the top of the upper cover (6.8) is provided with a pressure pump (6.9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121401777.0U CN215388517U (en) | 2021-06-23 | 2021-06-23 | Device for improving recovery rate of dimethyl carbonate device tail gas materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121401777.0U CN215388517U (en) | 2021-06-23 | 2021-06-23 | Device for improving recovery rate of dimethyl carbonate device tail gas materials |
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| Publication Number | Publication Date |
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| CN215388517U true CN215388517U (en) | 2022-01-04 |
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| CN202121401777.0U Active CN215388517U (en) | 2021-06-23 | 2021-06-23 | Device for improving recovery rate of dimethyl carbonate device tail gas materials |
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- 2021-06-23 CN CN202121401777.0U patent/CN215388517U/en active Active
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Address after: 198 Tongxing Road, Kenli District, Dongying City, Shandong Province Patentee after: Shenghua new energy technology (Dongying) Co.,Ltd. Patentee after: Shenghua New Material Group Co.,Ltd. Address before: 257500 Building 5, Houli village, Yong'an Town, Kenli District, Dongying City, Shandong Province Patentee before: Shenghua new energy technology (Dongying) Co.,Ltd. Patentee before: SHANDONG SHIDA SHENGHUA CHEMICAL GROUP Co.,Ltd. |
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