CN210057830U - High-efficient refinery contains benzene organic waste gas processing apparatus - Google Patents
High-efficient refinery contains benzene organic waste gas processing apparatus Download PDFInfo
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- CN210057830U CN210057830U CN201920740702.1U CN201920740702U CN210057830U CN 210057830 U CN210057830 U CN 210057830U CN 201920740702 U CN201920740702 U CN 201920740702U CN 210057830 U CN210057830 U CN 210057830U
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Abstract
The utility model discloses a high-efficiency benzene-containing organic waste gas treatment device for a refinery, which comprises a benzene absorption unit and a waste gas incineration unit, wherein the benzene absorption unit comprises a mixer, an absorption tower and a rich liquid pump, and a waste gas inlet of the mixer is connected with a first pipeline; the outlet of the mixer is communicated with a first inlet arranged at the lower part of one side of the absorption tower; a second inlet at the upper part of one side of the absorption tower is connected with a second pipeline; the rich liquid pump is connected between a liquid outlet at the bottom of the absorption tower and a rich liquid inlet of the mixer; the waste gas incineration unit comprises a first fan, an incinerator and a chimney, wherein an exhaust port at the top end of the absorption tower is communicated with an air inlet at the bottom of the incinerator through a third pipeline, the first fan and an air inlet valve, and the waste gas incineration unit is used for pressurizing organic waste gas discharged by the absorption tower and then sending the organic waste gas into the incinerator for full pyrolysis; the exhaust port at the bottom of the incinerator is communicated with a chimney through an exhaust valve and a pipeline. The device can realize that the refinery contains benzene organic waste gas emission up to standard, and no secondary pollutant produces.
Description
Technical Field
The utility model relates to a chemical industry equipment technical field, in particular to high-efficient refinery contains benzene organic waste gas processing apparatus.
Background
Since the 2014 comes out of the comprehensive VOCs treatment policy of the petrochemical industry, VOCs emission is actively controlled by a petrochemical refinery, and the treatment of organic waste gas of the refinery is always a difficult problem in VOCs treatment of the refinery due to unstable benzene content. The benzene-containing organic waste gas treatment in the refinery is generally carried out by adsorption (activated carbon, membrane treatment), combustion, absorption and the likeAnd (5) processing means. The adsorption method is the most common and mature process in the industrial waste gas treatment at present, wherein the activated carbon has been widely applied to the benzene-containing organic waste gas treatment in refineries due to the characteristics of strong adsorption capacity and sufficient raw materials, and the method has the defects of secondary pollution and high operation cost. The combustion method is suitable for various organic waste gases, the treatment efficiency of treating the VOCs waste gases by the combustion method is high, and the combustion method has great technical advantages in the field of organic waste gas purification, but if the refinery VOCs waste gases are benzene-containing organic waste gases, the concentration is more than 150mg/m3In time, it is difficult to achieve discharge up to standard by this method. The absorption method is to absorb the VOCs by using a solvent, separate the VOCs by the difference of physical properties between the solvent and the VOCs, and recover the absorbed VOCs as products. Water is a commonly used absorbent, but water does not have a significant effect on the absorption of organic gases.
Disclosure of Invention
The utility model aims to solve the technical problem that a can realize that the refinery contains benzene organic waste gas emission up to standard is provided, the high-efficient refinery that no secondary pollutant produced contains benzene organic waste gas processing apparatus.
The technical scheme of the utility model is that:
a high-efficiency refinery benzene-containing organic waste gas treatment device comprises a benzene absorption unit and a waste gas incineration unit, wherein the benzene absorption unit comprises a mixer, an absorption tower and a liquid-rich pump, and a waste gas inlet of the mixer is connected with a first pipeline and used for introducing organic waste gas; the outlet of the mixer is communicated with a first inlet arranged at the lower part of one side of the absorption tower and is used for sending the organic waste gas mixed with the absorbent rich liquid into the absorption tower; a second inlet at the upper part of one side of the absorption tower is connected with a second pipeline for introducing an absorbent to absorb benzene in the organic waste gas; the rich liquid pump is connected between a liquid outlet at the bottom of the absorption tower and a rich liquid inlet of the mixer, and is used for boosting the pressure of the absorbent rich liquid in the absorption tower and then sending the absorbent rich liquid into the mixer to carry out primary absorption on benzene in the organic waste gas;
the waste gas incineration unit comprises a first fan, an incinerator and a chimney, wherein an exhaust port at the top end of the absorption tower is communicated with an air inlet at the bottom of the incinerator through a third pipeline, the first fan and an air inlet valve, and the waste gas incineration unit is used for pressurizing organic waste gas discharged by the absorption tower and then sending the organic waste gas into the incinerator for full pyrolysis; and an exhaust port at the bottom of the incinerator is communicated with a chimney through an exhaust valve and a pipeline and is used for discharging the waste gas reaching the standard after full cracking into the atmosphere through the chimney.
Preferably, the absorbent is any one of straight-run diesel oil, catalytic diesel oil, coker diesel oil, straight-run gasoline, catalytic gasoline and coker gasoline.
Preferably, the outlet of the rich liquid pump is also connected with a plant returning pipeline in parallel, and the plant returning pipeline is used for returning the absorbent rich liquid in the absorption tower to the refinery after the pressure of the absorbent rich liquid is increased.
Preferably, a first pressure gauge and a tower top regulating valve are sequentially connected to an exhaust port close to the top end of the absorption tower on the third pipeline, and a signal output end of the first pressure gauge is connected with the tower top regulating valve and used for controlling the opening of the tower top regulating valve according to the pressure at the top of the absorption tower, so that the pressure at the top of the absorption tower is stabilized to be 0.01-0.3 MPa (A).
As a further preference, the third pipeline is connected with an on-line analyzer through a sampling pipeline, and the on-line analyzer is used for detecting the benzene concentration in the discharged organic waste gas; and the second pipeline is provided with an absorbent regulating valve, and the signal output end of the on-line analyzer is respectively connected with the tower top regulating valve and the absorbent regulating valve and is used for controlling the flow of the absorbent according to the benzene content in the organic waste gas.
Preferably, a second pressure gauge is arranged on the first pipeline, and a signal output end of the second pressure gauge is connected with a rich liquor regulating valve arranged at a rich liquor inlet of the mixer and used for balancing the pressure of the organic waste gas introduced into the mixer and the flow of the absorbent rich liquor.
More preferably, a burner connected to the incinerator is installed at the top end of the incinerator to maintain the temperature in the incinerator at 750-850 ℃.
Preferably, a second fan is further provided, and an air outlet of the second fan is communicated with the third pipeline and used for introducing fresh air to sweep the incinerator.
The utility model has the advantages that:
1. the secondary absorption of benzene in the benzene-containing organic waste gas can be realized through the mixer, the absorption tower and the rich liquid pump, the primary benzene absorption of the benzene-containing organic waste gas and the absorbent rich liquid at the bottom of the absorption tower is realized through the mixer, and the absorbent dosage of the absorption tower can be effectively reduced; after the organic waste gas is secondarily absorbed, the benzene content is obviously reduced, after the organic waste gas is incinerated by the incinerator, the all-standard emission of various indexes such as non-methane total hydrocarbon, benzene and the like can be realized, and no secondary pollutant is generated.
2. The absorbent of the device only needs refinery waste materials, the rich liquid after absorption can be returned to the refinery for recycling, the whole VOCs treatment process is not influenced by the pre-absorption treatment of the benzene-containing organic waste gas, the whole factory large process flow is not influenced, and no waste liquid is generated.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: the system comprises a mixer 1, an absorbent regulating valve 2, a second pipeline 3, an absorbent flowmeter 4, an absorption tower 5, a first pressure gauge 6, an online analyzer 7, a tower top regulating valve 8, a third pipeline 9, a first fan 10, an incinerator 11, a third fan 12, a combustor 13, an air inlet valve 14, an air outlet valve 15, a chimney 16, a fourth pipeline 17, a second fan 18, a rich liquid pump 19, a flow regulating valve 20, a liquid level transmitter 21, a rich liquid regulating valve 22, a rich liquid flowmeter 23, a second pressure gauge 24 and a first pipeline 25.
Detailed Description
As shown in figure 1, the utility model relates to a high-efficient refinery contains benzene organic waste gas processing apparatus, burn the unit including benzene absorption unit and waste gas, benzene absorption unit includes blender 1, absorption tower 5 and pregnant solution pump 19, and the first pipeline 25 of waste gas entry connection of blender 1 for let in the refinery and contain benzene organic waste gas. The mixer 1 adopts a Venturi mixer, and an outlet of the mixer 1 is communicated with a first inlet arranged at the lower part of one side of the absorption tower 5 through a pipeline and is used for sending the organic waste gas mixed with the rich liquid into the absorption tower 5. The absorption tower 5 adopts a filler absorption tower, and a second inlet at the upper part of one side of the absorption tower 5 is connected with a second pipeline 3 for introducing an absorbent to absorb benzene in the organic waste gas entering the absorption tower 5; the rich liquid pump 19 is connected between a liquid outlet at the bottom of the absorption tower 5 and a rich liquid inlet of the mixer 1 through a pipeline, and is used for boosting the pressure of the absorbent rich liquid in the absorption tower 5 and then sending the absorbent rich liquid into the mixer 1 to carry out primary absorption on benzene in the organic waste gas.
A second pressure gauge 24 is connected to the first line 25, and a signal output terminal of the second pressure gauge 24 is connected to a rich liquor regulating valve 22 provided on the line at the rich liquor inlet of the mixer 1 through a regulating valve control system (not shown in the figure) for balancing the pressure of the organic exhaust gas introduced into the mixer 1 and the flow rate of the absorbent rich liquor. When the pressure of the organic waste gas is too low, the flow of the absorbent rich liquid is reduced through the rich liquid regulating valve 22; and conversely, the flow rate of the rich absorbent solution is increased.
The absorbent entering the absorption tower through the second pipeline 3 is any one of straight-run diesel oil, catalytic diesel oil, coker diesel oil, straight-run gasoline, catalytic gasoline and coker gasoline.
And the outlet of the rich liquid pump 19 is also connected with a plant returning pipeline in parallel, and is used for returning the absorbent rich liquid in the absorption tower 5 to a refinery for recycling after boosting the pressure. The return pipeline is provided with a flow regulating valve 20 and a rich liquid flow meter 23, a liquid level transmitter 21 is arranged in the absorption tower 5, and the signal output ends of the liquid level transmitter 21 and the rich liquid flow meter 23 are connected with the flow regulating valve 20 through a regulating valve control system and are used for realizing cascade control of the flow of the rich liquid of the absorbent and the liquid level in the absorption tower so as to stabilize the liquid level in the absorption tower. When the liquid level is reduced, the regulating valve control system controls the regulating valve to reduce the outward flow of the rich liquid of the absorbent; and conversely, the delivery flow of the rich liquid of the absorbent is increased.
The gas outlet on the third pipeline 9 close to the top end of the absorption tower is sequentially connected with a first pressure gauge 6 and a tower top regulating valve 8, the signal output end of the first pressure gauge 6 is connected with the tower top regulating valve 8 through a regulating valve control system, and the opening of the tower top regulating valve 8 is controlled according to the top pressure of the absorption tower, so that the top pressure of the absorption tower is stabilized to be 0.01-0.3 MPa (A).
An on-line analyzer 7 is connected to the third line 9 at the outlet side of the tower top regulating valve 8 through a sampling line, and is used for detecting the benzene concentration in the discharged organic waste gas. An absorbent flow meter 4 and an absorbent regulating valve 2 are sequentially arranged on the second pipeline 3, and the signal output ends of the absorbent flow meter 4 and the on-line analyzer 7 are respectively connected with the tower top regulating valve 8 and the absorbent regulating valve 2 through a regulating valve control system and used for controlling the flow of the absorbent according to the benzene content in the organic waste gas. When the benzene content exceeds the standard, the flow of the absorbent is increased through the absorbent regulating valve 2, and otherwise, the flow of the absorbent is reduced.
The waste gas incineration unit comprises a first fan 10, an incinerator 11 and a chimney 16, wherein an exhaust port at the top end of the absorption tower is communicated with an air inlet arranged at the bottom of each hearth in the incinerator 11 through a third pipeline 9 and the first fan 10, and the waste gas incineration unit is used for pressurizing organic waste gas discharged by the absorption tower through the first fan 10 and then sending the organic waste gas into each hearth of the incinerator 11 for full cracking so as to remove non-methane total hydrocarbon, benzene and the like in the waste gas and realize the standard emission of the organic waste gas of a refinery; an air inlet valve 14 is respectively installed at an air inlet at the bottom of each hearth of the incinerator 11. The exhaust port at the bottom of each hearth in the incinerator 11 is communicated with a chimney 16 through an air outlet valve 15 and a fourth pipeline 17 and is used for discharging the fully cracked standard-reaching waste gas into the atmosphere through the chimney, and the concentration of benzene in the waste gas discharged from the exhaust port at the bottom of the incinerator 11 is 0-4mg/m3。
The incinerator 11 is any one of a regenerative incinerator, a catalytic incinerator, a regenerative catalytic incinerator, and a direct combustion incinerator. The top end of the incinerator is provided with a burner 13 communicated with the incinerator for maintaining the temperature of a hearth in the incinerator within 750-850 ℃ after being ignited. The air inlet of the burner 13 is connected to a third fan 12 through a pipeline for introducing air into the burner 13.
The device is also provided with a second fan 18, and an air outlet of the second fan 18 is communicated with a third pipeline 9 and used for introducing fresh air into the incinerator through the air inlet valve 14, blowing the inside of the incinerator, and blowing residual organic matters in the incinerator into the hearth for incineration so as to prevent cross contamination between the air inlet and the air outlet.
The treatment method of the benzene-containing organic waste gas treatment device in the high-efficiency refinery comprises the following steps:
1. the absorbent is sent into the absorption tower through a second pipeline 3, and simultaneously a liquid-rich pump 19 is started and a burner 13 arranged at the top end of the incinerator is ignited, and the temperature in the hearth of the incinerator is maintained at 750-850 ℃;
2. the benzene-containing organic waste gas is sent into a mixer through a first pipeline 25 and sent into an absorption tower through the mixer; absorbing benzene in the organic waste gas to form absorbent rich liquid and storing the absorbent rich liquid in an absorption tower under the action of the absorbent and the organic waste gas;
3. boosting a part of absorbent rich liquid in the absorption tower by a rich liquid pump, sending the boosted part of the absorbent rich liquid into a mixer, mixing the boosted part of the absorbent rich liquid with the entering organic waste gas, carrying out primary absorption on benzene in the organic waste gas by the absorbent rich liquid, mixing the organic waste gas subjected to primary absorption with the absorbent rich liquid, and sending the mixture into the absorption tower; the other part of the absorbent rich solution is returned to the refinery for recycling through a factory returning pipeline after being pressurized;
4. the organic waste gas absorbed by the absorbent in the absorption tower is discharged from an exhaust port at the top end of the absorption tower, and the benzene concentration in the discharged organic waste gas is detected in real time by an online analyzer 7;
5. when the benzene concentration detected by the on-line analyzer is lower than 150mg/m3When the waste gas is exhausted from the incinerator through the exhaust valve 15, the benzene concentration of the waste gas exhausted from the incinerator is 0-4mg/m3And enters a chimney through a pipeline to be discharged into the atmosphere.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (8)
1. The utility model provides a high-efficient refinery contains benzene organic waste gas processing apparatus which characterized by: the device comprises a benzene absorption unit and a waste gas incineration unit, wherein the benzene absorption unit comprises a mixer, an absorption tower and a liquid-rich pump, and a waste gas inlet of the mixer is connected with a first pipeline and used for introducing organic waste gas; the outlet of the mixer is communicated with a first inlet arranged at the lower part of one side of the absorption tower and is used for sending the organic waste gas mixed with the absorbent rich liquid into the absorption tower; a second inlet at the upper part of one side of the absorption tower is connected with a second pipeline for introducing an absorbent to absorb benzene in the organic waste gas; the rich liquid pump is connected between a liquid outlet at the bottom of the absorption tower and a rich liquid inlet of the mixer, and is used for boosting the pressure of the absorbent rich liquid in the absorption tower and then sending the absorbent rich liquid into the mixer to carry out primary absorption on benzene in the organic waste gas;
the waste gas incineration unit comprises a first fan, an incinerator and a chimney, wherein an exhaust port at the top end of the absorption tower is communicated with an air inlet at the bottom of the incinerator through a third pipeline, the first fan and an air inlet valve, and the waste gas incineration unit is used for pressurizing organic waste gas discharged by the absorption tower and then sending the organic waste gas into the incinerator for full pyrolysis; and an exhaust port at the bottom of the incinerator is communicated with a chimney through an exhaust valve and a pipeline and is used for discharging the waste gas reaching the standard after full cracking into the atmosphere through the chimney.
2. The efficient benzene-containing organic waste gas treatment device for the refinery as claimed in claim 1, which is characterized in that: the absorbent is any one of straight-run diesel oil, catalytic diesel oil, coking diesel oil, straight-run gasoline, catalytic gasoline and coking gasoline.
3. The efficient benzene-containing organic waste gas treatment device for the refinery as claimed in claim 1, which is characterized in that: and the outlet of the rich liquid pump is also connected with a factory returning pipeline in parallel, and the factory returning pipeline is used for returning the absorbent rich liquid in the absorption tower to a refinery for recycling after boosting the pressure of the absorbent rich liquid.
4. The efficient benzene-containing organic waste gas treatment device for the refinery as claimed in claim 1, which is characterized in that: the gas outlet on the third pipeline, which is close to the top end of the absorption tower, is sequentially connected with a first pressure gauge and a tower top regulating valve, and the signal output end of the first pressure gauge is connected with the tower top regulating valve for controlling the opening of the tower top regulating valve according to the top pressure of the absorption tower.
5. The high-efficiency benzene-containing organic waste gas treatment device of the refinery according to claim 1 or 4, which is characterized in that: the third pipeline is connected with an online analyzer through a sampling pipeline and is used for detecting the concentration of benzene in the discharged organic waste gas; and the second pipeline is provided with an absorbent regulating valve, and the signal output end of the on-line analyzer is respectively connected with the tower top regulating valve and the absorbent regulating valve and is used for controlling the flow of the absorbent according to the benzene content in the organic waste gas.
6. The efficient benzene-containing organic waste gas treatment device for the refinery as claimed in claim 1, which is characterized in that: and a second pressure gauge is arranged on the first pipeline, and a signal output end of the second pressure gauge is connected with a rich liquid regulating valve arranged at a rich liquid inlet of the mixer and used for balancing the pressure of the organic waste gas introduced into the mixer and the flow of the absorbent rich liquid.
7. The efficient benzene-containing organic waste gas treatment device for the refinery as claimed in claim 1, which is characterized in that: the top end of the incinerator is provided with a burner communicated with the incinerator for maintaining the temperature in the incinerator to be 750-850 ℃.
8. The efficient benzene-containing organic waste gas treatment device for the refinery as claimed in claim 1, which is characterized in that: and the second fan is also arranged, and an air outlet of the second fan is communicated with a third pipeline and used for introducing fresh air to blow the incinerator.
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| CN201920740702.1U CN210057830U (en) | 2019-05-22 | 2019-05-22 | High-efficient refinery contains benzene organic waste gas processing apparatus |
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| CN201920740702.1U CN210057830U (en) | 2019-05-22 | 2019-05-22 | High-efficient refinery contains benzene organic waste gas processing apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110090531A (en) * | 2019-05-22 | 2019-08-06 | 中国石油集团东北炼化工程有限公司锦州设计院 | A kind of efficient refinery's organic waste gas treatment device containing benzene and processing method |
| CN115591371A (en) * | 2022-11-30 | 2023-01-13 | 中化蓝天霍尼韦尔新材料有限公司（Cn） | Tail gas recovery system and method in trans-1-chloro-3, 3-trifluoropropene production process |
-
2019
- 2019-05-22 CN CN201920740702.1U patent/CN210057830U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110090531A (en) * | 2019-05-22 | 2019-08-06 | 中国石油集团东北炼化工程有限公司锦州设计院 | A kind of efficient refinery's organic waste gas treatment device containing benzene and processing method |
| CN115591371A (en) * | 2022-11-30 | 2023-01-13 | 中化蓝天霍尼韦尔新材料有限公司（Cn） | Tail gas recovery system and method in trans-1-chloro-3, 3-trifluoropropene production process |
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