CN215855846U - Device for producing durene from durene and durene - Google Patents
Device for producing durene from durene and durene Download PDFInfo
- Publication number
- CN215855846U CN215855846U CN202121590125.6U CN202121590125U CN215855846U CN 215855846 U CN215855846 U CN 215855846U CN 202121590125 U CN202121590125 U CN 202121590125U CN 215855846 U CN215855846 U CN 215855846U
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- pipeline
- separator
- durene
- compressor
- heat exchanger
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Abstract
The utility model discloses a device for generating durene by isomerizing durene and durene, wherein a pipeline at the bottom end of a reactor is sequentially connected with a first separator pipeline through a heat exchanger and a first cooler pipeline, the first separator pipeline is connected with an isomerization liquid outlet pipeline at the bottom end of the first separator pipeline and is connected with a second separator pipeline at the top end of the first separator pipeline through a second cooler pipeline, the second separator pipeline is connected with the isomerization liquid outlet pipeline at the bottom end of the second separator pipeline and is connected with a compressor pipeline at the top end of the second separator pipeline through a third separator pipeline, the compressor is connected with a heating furnace pipeline through the heat exchanger, and the heating furnace is connected with a top pipeline of the reactor; the pipeline between the compressor and the heating furnace is also connected with a hydrogen inlet pipeline and a mixed tetramethylbenzene feeding pipeline which are arranged in front of the heat exchanger. The method can isomerize the raw materials of the durene and the durene into the durene, has simple process, fully utilizes the raw materials, has obvious economic benefit, and is favorable for energy conservation and emission reduction.
Description
Technical Field
The utility model relates to a durene production device, in particular to a device for a production process for producing durene products by isomerizing mixed durene.
Background
Durene is an important organic chemical raw material and is mainly used for producing pyromellitic dianhydride. In these years, as the use of pyromellitic dianhydride has been increasing, the demand for durene has been increasing.
At present, durene production mainly comprises the steps of enriching durene components by a rectification method through petrochemical reforming carbon heavy aromatics, and then separating durene through freezing crystallization, wherein uncrystallized liquid mainly comprises durene and durene which are isomers of durene. The durene isomerization process technology can isomerize the partial durene and the continuous durene into durene (the yield is doubled), the utilization rate of the durene is improved, and the economic benefit and the social benefit are obvious.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide a device for generating durene by isomerizing durene and durene.
The device for generating durene by isomerizing durene and durene comprises a reactor, a heat exchanger, a first cooler, a first separator, a second cooler, a second separator, a third separator, a compressor and a heating furnace.
The pipeline at the bottom end of the reactor is sequentially connected with the first separator through a heat exchanger and a first cooler in a pipeline manner, the first separator is connected with an isomerization liquid outlet pipeline at the bottom end of the first separator and is connected with a second separator in a pipeline manner at the top end of the first separator through a second cooler, the second separator is connected with the isomerization liquid outlet pipeline at the bottom end of the second separator and is connected with the compressor pipeline at the top end of the second separator through a third separator, the compressor is connected with the heating furnace pipeline through the heat exchanger, and the heating furnace is connected with the top end of the reactor in a pipeline manner;
and a hydrogen inlet pipeline and a mixed tetramethylbenzene feeding pipeline are also connected to the pipeline between the compressor and the heating furnace, and the hydrogen inlet pipeline and the mixed tetramethylbenzene feeding pipeline are arranged in front of the heat exchanger.
Namely, the connecting pipeline between the reactor and the first separator and the connecting pipeline between the compressor and the heating furnace exchange heat through the heat exchanger.
The utility model also provides a method for isomerizing durene and durene to generate durene, which comprises the following steps:
mixed tetramethylbenzene as a raw material is introduced from a mixed tetramethylbenzene feeding pipeline, hydrogen is introduced from a hydrogen gas inlet pipeline, circulating hydrogen is introduced from a compressor, the mixed tetramethylbenzene and the hydrogen are preheated in a heat exchanger, introduced into a heating furnace under the conditions of the temperature of 200-230 ℃ and the pressure of 1.2-1.3 MPa, heated by the heating furnace, and introduced into an isomerization reactor under the conditions of the temperature of 270-300 ℃ and the pressure of 1.0-1.2 MPa for hydroisomerization reaction, so that the durene and the durene are converted into durene with the conversion rate of 10-15%.
After heat exchange is carried out between the material led out from the bottom of the reactor and the raw material through a heat exchanger, the material is cooled to 90-110 ℃ through a first cooler and enters a first separator under the conditions that the temperature is 110-130 ℃ and the pressure is 0.9-1.1 MPa. And (3) leading out circulating hydrogen from the top of the separator I, cooling the circulating hydrogen to 40-50 ℃ through a cooler II, allowing the circulating hydrogen to enter the separator II for gas-liquid separation, allowing the gas separated out by the separator II to enter a separator III again for further gas-liquid separation under the conditions of the temperature of 40-50 ℃ and the pressure of 0.9-1.1 MPa, and allowing the gas separated out by the separator III to circularly participate in the reaction again under the conditions of the temperature of 50-60 ℃ and the pressure of 1.2-1.3 MPa after the gas is pressurized by a hydrogen circulating compressor. The isomerization liquid enters an isomerization liquid outlet pipeline from the bottom of the first separator and the bottom of the second separator.
The method can isomerize the raw materials of the durene and the durene into the durene, has simple process, fully utilizes the raw materials, has obvious economic benefit, and is favorable for energy conservation and emission reduction.
Drawings
FIG. 1 is a schematic view showing the structure of an apparatus for producing durene from durene and durene according to the present invention.
Detailed Description
As shown in FIG. 1, the device for isomerizing durene from durene and durene of the present invention comprises a reactor A, a heat exchanger B, a first cooler C, a first separator D, a second cooler E, a second separator F, a third separator G, a compressor H, and a heating furnace I.
The pipeline at the bottom end of the reactor A is sequentially connected with the first separator D through a heat exchanger B and a first cooler C, the first separator D is connected with an isomerization liquid outlet pipeline at the bottom end of the first separator D and is connected with a second separator F through a second cooler E at the top end of the first separator D, the second separator F is connected with the isomerization liquid outlet pipeline at the bottom end of the second separator F and is connected with the compressor H through a third separator G at the top end of the second separator F, the compressor H is connected with the heating furnace I through a heat exchanger B, and the heating furnace I is connected with the top end of the reactor A through a pipeline;
and a hydrogen inlet pipeline and a mixed tetramethylbenzene feeding pipeline are also connected to the pipeline between the compressor H and the heating furnace I, and the hydrogen inlet pipeline and the mixed tetramethylbenzene feeding pipeline are arranged in front of the heat exchanger B.
Namely, the connecting pipeline between the reactor A and the separator D and the connecting pipeline between the compressor H and the heating furnace I exchange heat through the heat exchanger B.
The working process of the utility model is as follows:
mixed tetramethylbenzene as a raw material is introduced from a mixed tetramethylbenzene feeding pipeline, hydrogen is introduced from a hydrogen gas inlet pipeline, circulating hydrogen is introduced from a compressor, the mixed tetramethylbenzene and the hydrogen are preheated in a heat exchanger B, introduced into a heating furnace I under the conditions of the temperature of 200-230 ℃ and the pressure of 1.2-1.3 MPa, heated by the heating furnace I, and introduced into an isomerization reactor A under the conditions of the temperature of 270-300 ℃ and the pressure of 1.0-1.2 MPa for hydroisomerization reaction, so that the tetramethylbenzene and the continuous tetramethylbenzene are converted into durene with the conversion rate of 10-15%.
And after the material led out from the bottom of the reactor A exchanges heat with the raw material through the heat exchanger B, the material is cooled to 90-110 ℃ through the cooler C and enters the separator D under the conditions that the temperature is 110-130 ℃ and the pressure is 0.9-1.1 MPa. And (3) leading out circulating hydrogen from the top of the separator I D, cooling the circulating hydrogen to 40-50 ℃ through a cooler II E, allowing the circulating hydrogen to enter a separator II F for gas-liquid separation, allowing the gas separated out by the separator II F to enter a separator III G again for further gas-liquid separation under the conditions of the temperature of 40-50 ℃ and the pressure of 0.9-1.1 MPa, and allowing the gas separated out by the separator III G to circularly participate in the reaction again under the conditions of the temperature of 50-60 ℃ and the pressure of 1.2-1.3 MPa after the gas is pressurized by a hydrogen circulating compressor H. The isomerization liquid is led out from the bottom of the first separator D and the bottom of the second separator F, and the detection shows that the content of durene in the isomerization liquid reaches 20 +/-2 percent.
The embodiments of the present invention include, but are not limited to, the above-mentioned embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and the substance of the present invention, and still fall into the scope of the present invention.
Claims (1)
1. A device for generating durene from durene and durene comprises a reactor (A), a heat exchanger (B), a cooler I (C), a separator I (D), a cooler II (E), a separator II (F), a separator III (G), a compressor (H) and a heating furnace (I); the method is characterized in that:
the pipeline at the bottom end of the reactor (A) is connected with the first separator (D) through a heat exchanger (B) and a first cooler (C) in sequence, the first separator (D) is connected with an isomerization liquid outlet pipeline at the bottom end thereof and is connected with a second separator (F) through a second cooler (E) at the top end thereof through a pipeline, the second separator (F) is connected with the isomerization liquid outlet pipeline at the bottom end thereof and is connected with the compressor (H) through a third separator (G) at the top end thereof, the compressor (H) is connected with the heating furnace (I) through a heat exchanger (B) in a pipeline way, and the heating furnace (I) is connected with the top end of the reactor (A) in a pipeline way;
and a hydrogen inlet pipeline and a mixed tetramethylbenzene feeding pipeline are also connected to the pipeline between the compressor (H) and the heating furnace (I), and the hydrogen inlet pipeline and the mixed tetramethylbenzene feeding pipeline are arranged in front of the heat exchanger (B).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121590125.6U CN215855846U (en) | 2021-07-14 | 2021-07-14 | Device for producing durene from durene and durene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121590125.6U CN215855846U (en) | 2021-07-14 | 2021-07-14 | Device for producing durene from durene and durene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215855846U true CN215855846U (en) | 2022-02-18 |
Family
ID=80333795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121590125.6U Withdrawn - After Issue CN215855846U (en) | 2021-07-14 | 2021-07-14 | Device for producing durene from durene and durene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215855846U (en) |
-
2021
- 2021-07-14 CN CN202121590125.6U patent/CN215855846U/en not_active Withdrawn - After Issue
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20220218 Effective date of abandoning: 20220823 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20220218 Effective date of abandoning: 20220823 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |