CN216856223U - Ethylene carbonate waste gas classification device - Google Patents
Ethylene carbonate waste gas classification device Download PDFInfo
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- CN216856223U CN216856223U CN202221391703.8U CN202221391703U CN216856223U CN 216856223 U CN216856223 U CN 216856223U CN 202221391703 U CN202221391703 U CN 202221391703U CN 216856223 U CN216856223 U CN 216856223U
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Abstract
The utility model relates to the field of auxiliary devices for production of ethylene carbonate, in particular to a device for classifying and treating ethylene carbonate waste gas. The technical scheme is as follows: the device comprises a normal emission tail gas treatment device and an accident tail gas treatment device, wherein the output end of a ethylene carbonate crude product tank of the normal emission tail gas treatment device is connected to a first material absorption tank, and the upper side of the first material absorption tank is connected to a first washing tower through a pipeline; the output end of the vacuum unit tail gas tank is connected to the upper end of the vacuum unit tail gas buffer tank, the upper end of the vacuum unit tail gas buffer tank is connected to the second material absorption tank, the upper side of the second material absorption tank is connected to the first washing tower through a pipeline, and the upper end of the first washing tower is connected to the carbon dioxide recovery device. The beneficial effects are that: the two tail gas treatment devices are respectively provided with a material absorption tank and a washing tower, waste gas generated by the device is absorbed, washed and adsorbed, finally the national standard emission standard is reached, and the capacity expansion requirement of the future device is improved and met.
Description
Technical Field
The utility model relates to the field of auxiliary devices for production of ethylene carbonate, in particular to a device for classifying and treating ethylene carbonate waste gas.
Background
Ethylene Carbonate (EC), apply to the organic synthetic field extensively, it is a basic raw materials of organic chemical industry of latent green, at present, the industrial production of ethylene carbonate generally adopts ethylene oxide and carbon dioxide addition method, the production cost of this process is low, conversion rate and selectivity are high, the product is separated simply, but at the same time, ethylene oxide and carbon dioxide addition method produce ethylene carbonate craft can produce the process end gas comprising ethylene oxide, carbon dioxide and ethylene carbonate, produce the environmental protection problem and cause the raw materials to waste, increase the pressure of environmental protection, reduce the product yield, this is because the raw materials that this process production unit uses are low boiling point materials, it is very volatile; the rectification unit needs negative pressure operation, and the vacuum unit also pumps out a large amount of non-condensable gas. The waste gas of the device brought by the method can not be ignored, particularly under the current increasingly strict environmental protection requirement and the development trend of green chemical industry, the recovery treatment of the tail gas of the device is very important, and the product yield of the device can be reduced due to the loss of the tail gas, so that the profit is influenced.
The Chinese patent number of this unit application is CN202121359322.7, and the patent name is "a kind of ethylene carbonate device exhaust gas system material recovery unit", its technical scheme is: the feed gas is connected to a gas-liquid separation tank through an air cooler and a water cooler, a liquid outlet at the lower end of the gas-liquid separation tank is connected to an ethylene carbonate delivery pump through a pipeline, a gas outlet at the upper end of the gas-liquid separation tank is connected with a heavy-component removal rectifying tower through a feed gas compressor, the upper end of the heavy-component removal rectifying tower is connected with a light-component removal rectifying tower, the top of the light-component removal rectifying tower is connected with a light-component removal reflux tank through a light-component removal condenser, and an outlet at the middle part of the light-component removal rectifying tower is connected with more than one group of activated carbon adsorbers. However, there are problems in that: along with the continuous upgrading of a ethylene carbonate device, the product yield is gradually improved, the waste gas production amount is increased, the device is divided into a normal tail gas emission device and an accident tail gas emission device, and classification treatment is needed, so that the treatment capacity of the current waste gas treatment device cannot meet the requirement.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art, and provides the ethylene carbonate waste gas classification treatment device which can treat the normally discharged tail gas and the tail gas generated under the abnormal working condition in time, so that the treatment capacity of the waste gas treatment device is increased, and the production requirement is met.
The utility model provides a sorting treatment device for ethylene carbonate waste gas, which comprises a normal emission tail gas treatment device and an accident tail gas treatment device, wherein the normal emission tail gas treatment device comprises a first material absorption tank, a second material absorption tank, a vacuum unit tail gas buffer tank, a first washing tower, an ethylene carbonate crude product tank, a vacuum unit tail gas tank, a sewage treatment workshop and a carbon dioxide recovery device; the output end of the vacuum unit tail gas tank is connected to the upper end of a vacuum unit tail gas buffer tank through a pipeline, the lower end of the vacuum unit tail gas buffer tank is connected to a liquid sewage discharge pipeline, the upper end of the vacuum unit tail gas buffer tank is connected to a second material absorption tank through a pipeline, the lower end of the second material absorption tank is connected to a liquid sewage discharge pipeline through a pipeline, the upper side of the second material absorption tank is connected to a first washing tower through a pipeline, and the upper end of the first washing tower is connected to a carbon dioxide recovery device through a pipeline;
preferably, the accident tail gas treatment device comprises an ethylene oxide chiller, a third material absorption tank, a second washing tower, a liquid seal tank, a chilled water return storage tank, an ethylene oxide storage tank safety valve, a chilled water inlet storage tank, other safety valve discharge header pipes, a second pressure pump and a third washing pump, wherein the tube pass of the ethylene oxide chiller is respectively connected with the chilled water return storage tank and the chilled water inlet storage tank, the inlet end of the shell pass of the ethylene oxide chiller is connected with the ethylene oxide storage tank safety valve, the outlet end of the shell pass is connected with the third material absorption tank, the upper side of the third material absorption tank is connected to the lower side of the second washing tower through a pipeline, the top of the second washing tower is connected to the liquid seal tank through a pipeline, and the upper side outlet of the liquid seal tank is connected to a high-altitude discharge pipe.
Preferably, the lower end of the first washing tower is connected to a sewage treatment plant through a pipeline and a first washing pump.
Preferably, the upper end of the first scrubber tower is connected to a carbon dioxide recovery unit through a line and a second scrubber pump.
Preferably, the bottom of the second washing tower is connected to a sewage treatment plant through a third washing pump and a pipeline.
Preferably, the pipeline connected with the third washing pump is connected with a sprayer at the upper part of the second washing tower through a valve and a circulating pipeline.
Preferably, the lower side of the liquid seal tank is connected to the lower side of the second scrubber through a pipeline.
The utility model has the beneficial effects that:
the method comprises the steps that tail gas such as carbon dioxide, ethylene oxide and the like released by normal reaction products is treated through a normal exhaust tail gas treatment device, the tail gas comprising the tail gas of a crude ethylene carbonate tank and the tail gas of a tail gas tank of a vacuum unit, and the tail gas normally exhausted is treated through a first material absorption tank, a second material absorption tank, a tail gas buffer tank of the vacuum unit and a first washing tower;
secondly, the accident tail gas generated under the abnormal working condition is treated by an accident tail gas treatment device, the accident tail gas comprises tail gases of an ethylene oxide storage tank safety valve and other safety valve discharge main pipes, the tail gases of the ethylene oxide storage tank safety valve are sent into a third material absorption tank after being subjected to deep cooling through an ethylene oxide deep cooler, the tail gases of the other safety valve discharge main pipes are directly sent into the third material absorption tank, the treated tail gases are sent into a second washing tower, the qualified washed tail gases enter a liquid seal tank, and then the tail gases are discharged at high altitude;
in a word, two kinds of tail gas processing apparatus all are equipped with material absorption tank, scrubbing tower, absorb, wash, adsorb the waste gas that produces, finally reach national standard emission standard, thoroughly improve and satisfy future device productivity and enlarge the demand.
Drawings
FIG. 1 is a schematic diagram of a normal emission exhaust gas treatment device according to the present invention;
FIG. 2 is a schematic diagram of the emergency tail gas treatment device according to the present invention;
in the figure: the system comprises a first material absorption tank 1, a second material absorption tank 2, a vacuum unit tail gas buffer tank 3, a first washing tower 4, a crude ethylene carbonate product tank 5, a vacuum unit tail gas tank 6, a first pressure pump 7, a sewage treatment workshop 8, a first washing pump 9, a carbon dioxide recovery device 10, a second washing pump 11 and a liquid sewage discharge pipeline 12;
the system comprises an ethylene oxide deep cooler 21, a third material absorption tank 22, a second washing tower 23, a liquid seal tank 24, a chilled water return storage tank 25, an ethylene oxide storage tank safety valve 26, a chilled water inlet storage tank 27, other safety valve discharge header pipes 28, a second pressure pump 29, a third washing pump 30, a sprayer 23.1, a circulating pipeline 23.2, a valve 23.3 and a high-altitude discharge pipe 24.1.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it should be understood that they are presented herein only to illustrate and explain the present invention and not to limit the present invention.
Wherein the lower end of the first washing tower 4 is connected to a sewage treatment plant 8 through a pipeline and a first washing pump 9; the upper end of the first scrubber 4 is connected to a carbon dioxide recovery unit 10 through a pipeline and a second scrubber pump 11.
Referring to fig. 2, the accident tail gas treatment device provided by the utility model comprises an ethylene oxide chiller 21, a third material absorption tank 22, a second washing tower 23, a liquid seal tank 24, a chilled water return storage tank 25, an ethylene oxide storage tank safety valve 26, a chilled water inlet storage tank 27, other safety valve discharge header pipes 28, a second pressure pump 29 and a third washing pump 30, wherein the tube pass of the ethylene oxide chiller 21 is respectively connected with the chilled water return storage tank 25 and the chilled water inlet storage tank 27, the inlet end of the shell pass of the ethylene oxide chiller 21 is connected with the ethylene oxide storage tank safety valve 26, the outlet end of the shell pass is connected with the third material absorption tank 22, the upper side of the third material absorption tank 22 is connected to the lower side of the second washing tower 23 through a pipeline, the top of the second washing tower 23 is connected to the liquid seal tank 24 through a pipeline, and the outlet of the upper side of the liquid seal tank 24 is connected to an upper air discharge pipe 24.1.
Wherein the bottom of the second washing tower 23 is connected to the sewage treatment plant 8 through a third washing pump 30 and a pipeline; the pipeline connected with the third washing pump 30 is connected with a sprayer 23.1 at the upper part of the second washing tower 23 through a valve 23.3 and a circulating pipeline 23.2; the lower side of the liquid seal tank 24 is connected to the lower side of the second washing tower 23 through a pipeline, and the liquid seal tank 24 is filled with water and can also supplement water for washing to the second washing tower 23.
When the device is used, tail gas such as carbon dioxide and ethylene oxide released by normal reaction products is absorbed by the first material absorption tank 1 and the second material absorption tank 2, the tail gas pumped by the vacuum unit passes through the vacuum unit tail gas buffer tank 3, part of ethylene carbonate is left in the vacuum unit tail gas buffer tank 3, non-condensable gas enters the second material absorption tank 2 to be absorbed, non-absorbable waste gas enters the first washing tower 4 and is uniformly distributed, circulating water is pumped by the first washing pump 9 to wash the waste gas, the waste gas qualified in washing enters the carbon dioxide recovery device 10, washing liquid is transferred to a sewage treatment workshop 8 through the first washing pump 9 to be treated, and absorption liquid of the first material absorption tank 1 and the second material absorption tank 2 is transferred to the sewage treatment workshop 8 through the first pressure pump 7 to be treated.
When abnormal working conditions occur and accident tail gas is released, such as overtemperature and overpressure emergency release, when the safety valve releases the accident tail gas, the tail gas of the ethylene oxide storage tank enters the ethylene oxide deep cooler 21 for deep cooling through the ethylene oxide storage tank safety valve 26, and the non-condensable gas enters the third material absorption tank 22 for absorption; in addition, tail gas collected by the other safety valve discharge main pipes 28 is also sent to the third material absorption tank 22 for absorption, unabsorbed waste gas enters the second washing tower 23 and is uniformly distributed, circulating water is pumped by the third washing pump 30 to wash the waste gas, the waste gas qualified in washing enters the liquid seal tank 24 for further absorption, and high-altitude discharge is realized through the high-altitude discharge pipe 24.1, and in addition, the liquid seal tank 24 can also supplement water for the second washing tower 23 to be used as washing liquid; in a word, the accident tail gas treatment device can not only treat the tail gas generated under the abnormal working condition in time, but also reduce the resource waste under the unnecessary working condition.
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 are within the scope of the claims of the present invention.
Claims (6)
1. The utility model provides a categorised processing apparatus of ethylene carbonate waste gas, includes normal emission tail gas processing apparatus, characterized by: the device comprises a first material absorption tank (1), a second material absorption tank (2), a vacuum unit tail gas buffer tank (3), a first washing tower (4), a crude ethylene carbonate tank (5), a vacuum unit tail gas tank (6), a sewage treatment workshop (8) and a carbon dioxide recovery device (10), wherein the output end of the crude ethylene carbonate tank (5) is connected to the first material absorption tank (1) through a pipeline, the upper side of the first material absorption tank (1) is connected to the first washing tower (4) through a pipeline, and the lower end of the first material absorption tank (1) is connected to a liquid sewage discharge pipeline (12) through a pipeline; the output end of the vacuum unit tail gas tank (6) is connected to the upper end of a vacuum unit tail gas buffer tank (3) through a pipeline, the lower end of the vacuum unit tail gas buffer tank (3) is connected to a liquid sewage discharge pipeline (12), the upper end of the vacuum unit tail gas buffer tank (3) is connected to a second material absorption tank (2) through a pipeline, the lower end of the second material absorption tank (2) is connected to the liquid sewage discharge pipeline (12) through a pipeline, the upper side of the second material absorption tank (2) is connected to a first washing tower (4) through a pipeline, and the upper end of the first washing tower (4) is connected to a carbon dioxide recovery device (10) through a pipeline;
the accident tail gas treatment device comprises an ethylene oxide deep cooler (21), a third material absorption tank (22), a second washing tower (23), a liquid seal tank (24), a chilled water return water storage tank (25), an ethylene oxide storage tank safety valve (26), a chilled water inlet storage tank (27), other safety valve discharge header pipes (28), a second pressure pump (29) and a third washing pump (30), wherein the tube pass of the ethylene oxide deep cooler (21) is respectively connected with the chilled water return water storage tank (25) and the chilled water inlet storage tank (27), the inlet end of the shell pass of the ethylene oxide deep cooler (21) is connected with the ethylene oxide storage tank safety valve (26), the outlet end of the shell pass is connected with the third material absorption tank (22), the upper side of the third material absorption tank (22) is connected to the lower side of the second washing tower (23) through a pipeline, and the top of the second washing tower (23) is connected to the liquid seal tank (24) through a pipeline, the upper outlet of the liquid seal tank (24) is connected to an overhead discharge pipe (24.1).
2. The apparatus for classifying and treating an ethylene carbonate off-gas according to claim 1, wherein: the lower end of the first washing tower (4) is connected to a sewage treatment plant (8) through a pipeline and a first washing pump (9).
3. The apparatus for classifying and treating an ethylene carbonate off-gas according to claim 2, wherein: the upper end of the first scrubber tower (4) is connected to a carbon dioxide recovery device (10) through a pipeline and a second scrubber pump (11).
4. The apparatus for classifying and treating an ethylene carbonate off-gas according to claim 1, wherein: the bottom of the second scrubber tower (23) is connected to a sewage treatment plant (8) through a third scrubber pump (30) and piping.
5. The apparatus for classifying and treating an ethylene carbonate off-gas according to claim 4, wherein: the pipeline connected with the third washing pump (30) is connected with a sprayer (23.1) at the upper part of the second washing tower (23) through a valve (23.3) and a circulating pipeline (23.2).
6. The ethylene carbonate waste gas classification treatment device according to claim 5, characterized in that: the lower side of the liquid seal tank (24) is connected to the lower side of the second washing tower (23) through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221391703.8U CN216856223U (en) | 2022-06-07 | 2022-06-07 | Ethylene carbonate waste gas classification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221391703.8U CN216856223U (en) | 2022-06-07 | 2022-06-07 | Ethylene carbonate waste gas classification device |
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| Publication Number | Publication Date |
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| CN216856223U true CN216856223U (en) | 2022-07-01 |
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| CN202221391703.8U Active CN216856223U (en) | 2022-06-07 | 2022-06-07 | Ethylene carbonate waste gas classification device |
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2022
- 2022-06-07 CN CN202221391703.8U patent/CN216856223U/en active Active
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