CN212403975U - Benzene recovery unit is used in conduction oil production - Google Patents
Benzene recovery unit is used in conduction oil production Download PDFInfo
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- CN212403975U CN212403975U CN202020761023.5U CN202020761023U CN212403975U CN 212403975 U CN212403975 U CN 212403975U CN 202020761023 U CN202020761023 U CN 202020761023U CN 212403975 U CN212403975 U CN 212403975U
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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
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Abstract
The utility model provides a benzene recovery device for heat-conducting oil production, which comprises a hot oil expansion tank, a toluene recovery tower, a toluene recovery reflux distributor, a recovery tank aftercooler, a transfer pump, a recovered benzene storage tank, a DBT distillation tower and an intermediate receiving tank; the output ends of one group of hot oil expansion tanks are communicated with the inlet end of a toluene recovery tank, the toluene recovery tank is provided with a plurality of groups of outlet ends, one outlet end is communicated with the inlet end of a toluene recovery tower, the other outlet end is communicated to a DBT distillation tower, and the other outlet end returns to the output pipeline of the other hot oil expansion tank; the outlet end of the toluene recovery tower is communicated with the inlet end of the toluene recovery reflux distributor. The device is through once retrieving, twice mode of retrieving the conduction oil in the hot oil expansion tank, has improved the higher utilization ratio of retrieving to benzene, compares with conventional technique, and this device equipment is simple, and the process is not loaded down with trivial details, can carry out recycle benzene by bigger degree, and the cost is reduced, and production safety has protected ecological environment simultaneously.
Description
Technical Field
The utility model belongs to the equipment field of high temperature conduction oil production and use, in particular to benzene recovery unit is used in conduction oil production.
Background
The heat conducting oil is also called heat conducting oil, has the properties of thermal cracking resistance and chemical oxidation resistance, good heat transfer efficiency, fast heat dissipation and good thermal stability, the processing technology in the process of generating the heat conducting oil is mainly completed by four steps of reaction, water washing, toluene recovery and DBT distillation, the raw materials adopted in the reaction are toluene and benzyl chloride, certain toluene still remains after the heat conducting oil generated after the reaction is subjected to primary treatment, and in the industrial and agricultural fields, a large amount of toluene is used as a solvent and a high-octane gasoline additive and is an important raw material of organic chemical industry.
Carrying out side chain chlorination on toluene to obtain monochlorobenzyl; benzyl alcohol, including its derivatives, is widely used in the synthesis of medicines, pesticides, dyes, and, in particular, fragrances. However, toluene itself is toxic and flammable, and vapors can form explosive mixtures with air, and at high concentrations, can be anesthetic and irritating.
In addition, how to recycle toluene to the maximum extent is also one of the important links for saving cost when toluene is used as a raw material for heat transfer oil production.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems of greater recovery degree during the recovery of the methylbenzene and complicated conventional processes, the utility model provides a benzene recovery device for the production of heat-conducting oil, which comprises a hot oil expansion tank, a methylbenzene recovery tower, a methylbenzene recovery reflux distributor, a recovery tank aftercooler, a transfer pump, a recovered benzene storage tank, a DBT distillation tower and an intermediate receiving tank; the hot oil expansion tanks are divided into two groups, the output ends of one group are communicated with the inlet end of a toluene recovery tank, the toluene recovery tank is provided with a plurality of groups of outlet ends, one outlet end is communicated with the inlet end of a toluene recovery tower, the other outlet end is communicated to a DBT distillation tower through a conveying pipeline, and the other outlet end is communicated and returned to the output pipeline of the other hot oil expansion tank through the conveying pipeline; the outlet end of the toluene recovery tower is communicated with the inlet end of a toluene recovery reflux distributor, one outlet end of the toluene recovery reflux distributor enters a recovered benzene storage tank after passing through a recovery tank aftercooler, and the other outlet end of the toluene recovery reflux distributor is communicated and returned to the toluene recovery tower; the transfer pump and the intermediate receiving tank are respectively communicated to the interior of the toluene recovery tank through a conveying process liquid pipeline.
As an improvement, a recovery tank condenser is arranged and is communicated with the toluene recovery tower, one end of the recovery tank condenser is communicated with the circulating water upper pipe, and the other end of the recovery tank condenser is communicated with the circulating water lower pipe.
As an improvement, the outlet end of the toluene recovery tower is sequentially communicated with the first after-cooler of the recovery tank and the second after-cooler of the recovery tank through a vent pipeline, and is communicated with the vent pipeline at the other end, wherein the first after-cooler of the recovery tank is communicated with the second after-cooler of the recovery tank through the vent pipeline, and the vent pipeline is used for discharging gas.
As an improvement, the system also comprises a frozen water feeding pipe inlet pipe and a frozen water drainage pipe outlet pipe, wherein the inlet end of the second aftercooler of the recovery tank is communicated with the inlet end of the frozen water feeding pipe inlet pipe, and the outlet end of the second aftercooler of the recovery tank is communicated with the outlet end of the frozen water drainage pipe outlet pipe.
As an improvement, the inlet end of the first aftercooler of the recovery tank is communicated with the inlet end of the circulating water upper water pipe, and the outlet end of the first aftercooler of the recovery tank is communicated with the outlet end of the circulating water lower water pipe.
As an improvement, the device is also provided with a low-pressure steam pipeline and a low-pressure nitrogen pipeline which are respectively and independently provided with a conveying pipeline communicated to the interior of the toluene recovery tank.
And as an improvement, the system also comprises a micro-pressure nitrogen pipeline which is communicated to the inside of the emptying pipeline after passing through the second aftercooler of the recovery tank through a conveying pipeline and is used for conveying the micro-pressure nitrogen.
Has the advantages that: the utility model provides a benzene recovery unit for heat conduction oil production, which improves the higher utilization rate of the recovery of benzene by the way of carrying out primary recovery and secondary recovery on the heat conduction oil in a hot oil expansion tank; set up a series of different fluid medium's condensing equipment simultaneously for the safety in production who withdraws the process compares with conventional technique, the utility model discloses a device equipment is simple, and the process is not loaded down with trivial details, can carry out recycle benzene by bigger degree, and the cost is reduced produces safety simultaneously, has protected ecological environment.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of the device of the present invention.
In the attached drawing, a hot oil expansion tank 1, a toluene recovery tank 2, a toluene recovery tower 3, a toluene recovery reflux distributor 4, a recovery tank aftercooler 5, a transfer pump 6, a recovered benzene storage tank 7, a DBT distillation tower 8, an intermediate receiving tank 9, a recovery tank condenser 10, a recovery tank first aftercooler 11, a recovery tank second aftercooler 12, a frozen water upper water pipe inlet pipe 13, a micro-pressure nitrogen pipeline 14, a circulating water upper water pipe 15, a low-pressure steam pipeline 16 and a low-pressure nitrogen pipeline 17.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
A benzene recovery device for heat conduction oil production comprises a hot oil expansion tank 1, a toluene recovery tank 2, a toluene recovery tower 3, a toluene recovery reflux distributor 4, a recovery tank aftercooler 5, a transfer pump 6, a recovered benzene storage tank 7, a DBT distillation tower 8 and an intermediate receiving tank 9; the hot oil expansion tanks 1 are divided into two groups, the output ends of one group are communicated with the inlet end of the toluene recovery tank 2, the toluene recovery tank 2 is provided with a plurality of groups of outlet ends, one of the outlet ends is communicated with the inlet end of the toluene recovery tower 3, the other outlet end is communicated with the DBT distillation tower 8 through a conveying pipeline, and the other outlet end is communicated and returned to the output pipeline of the other hot oil expansion tank 1 through the conveying pipeline; the outlet end of the toluene recovery tower 3 is communicated with the inlet end of a toluene recovery reflux distributor 4, one outlet end of the toluene recovery reflux distributor 4 passes through a recovery tank after-cooler 5 and then enters a recovered benzene storage tank 7, and the other outlet end is communicated with the toluene recovery tower 3; the transfer pump 6 and the intermediate receiving tank 9 are separately communicated to the interior of the toluene recovery tank 2 through a transfer process liquid pipeline.
Wherein the DBT distillation tower is a dibenzyl toluene distillation tower, and the process liquid is chlorobenzyl toluene.
The recovery tank condenser 10 is arranged, the recovery tank condenser 10 is communicated with the toluene recovery tower 3, one end of the recovery tank condenser is communicated with the circulating water upper water pipe 15, and the other end of the recovery tank condenser is communicated with the circulating water lower water pipe.
The outlet end of the toluene recovery tower 3 is sequentially communicated with the first after-cooler 11 of the recovery tank and the second after-cooler 12 of the recovery tank through a vent pipeline, and is communicated with the vent pipeline at the other end, wherein the first after-cooler 11 of the recovery tank is communicated with the second after-cooler 12 of the recovery tank through the vent pipeline, and the vent pipeline is used for discharging gas.
The system also comprises a chilled water feeding pipe inlet pipe 13 and a chilled water drainage pipe outlet pipe, wherein the inlet end of the second aftercooler 12 of the recovery tank is communicated with the inlet end of the chilled water feeding pipe inlet pipe, and the outlet end of the second aftercooler is communicated with the outlet end of the chilled water drainage pipe outlet pipe. The inlet end of the first aftercooler 11 of the recovery tank is communicated with the inlet end of the circulating water upper water pipe 15, and the outlet end of the first aftercooler of the recovery tank is communicated with the outlet end of the circulating water lower water pipe.
A low-pressure steam pipeline 16 and a low-pressure nitrogen pipeline 17 are also arranged, and conveying pipelines are respectively and separately arranged and communicated to the interior of the toluene recovery tank 2. The pressure of the low-pressure nitrogen is set to be less than 6MPa, and the pressure of the micro-pressure nitrogen is set to be 6-10 MPa.
The working principle is as follows: the utility model discloses in with the high temperature conduction oil in the hot oil expansion tank pass through the pipeline and carry toluene recovery jar 2 in, after partly toluene was retrieved, carry the conduction oil and return the cold conduction oil pipeline of carrying of another hot oil expansion tank and carry away together in.
Meanwhile, at the other outlet end of the toluene recovery tank 2, the toluene is conveyed to a toluene recovery reflux distributor 4 through a toluene recovery tower 3 through a process liquid pipeline, enters a recovery tank aftercooler 5, and is finally conveyed to a recovered benzene storage tank 7 to complete recovery.
In order to guarantee the safety in production of work, be provided with multiunit condensation, circulating water device, specific including: the inlet end of the first aftercooler 11 of the recovery tank is communicated with the inlet end of the circulating water upper water pipe 15, and the outlet end of the first aftercooler of the recovery tank is communicated with the outlet end of the circulating water lower water pipe. The inlet end of the second aftercooler 12 of the recovery tank is communicated with the inlet end of the inlet pipe of the chilled water upper pipe, and the outlet end of the second aftercooler is communicated with the outlet end of the outlet pipe of the chilled water lower pipe. The low-pressure steam pipeline 16 and the low-pressure nitrogen pipeline 17 are respectively provided with a conveying pipeline communicated to the interior of the toluene recovery tank 2. The device ensures the safety and high efficiency of the work in the toluene recovery process.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (7)
1. The utility model provides a benzene recovery unit is used in conduction oil production which characterized in that: comprises a hot oil expansion tank (1), a toluene recovery tank (2), a toluene recovery tower (3), a toluene recovery reflux distributor (4), a recovery tank aftercooler (5), a transfer pump (6), a recovered benzene storage tank (7), a DBT distillation tower (8) and an intermediate receiving tank (9); the hot oil expansion tanks (1) are divided into two groups, the output ends of one group are communicated with the inlet end of the toluene recovery tank (2), the toluene recovery tank (2) is provided with a plurality of groups of outlet ends, one outlet end is communicated with the inlet end of the toluene recovery tower (3), the other outlet end is communicated to the DBT distillation tower (8) through a conveying pipeline, and the other outlet end is communicated and returned to the output pipeline of the other hot oil expansion tank (1) through the conveying pipeline; the outlet end of the toluene recovery tower (3) is communicated with the inlet end of a toluene recovery reflux distributor (4), one outlet end of the toluene recovery reflux distributor (4) enters a recovered benzene storage tank (7) after passing through a recovery tank aftercooler (5), and the other outlet end is communicated with and returned to the toluene recovery tower (3); the transfer pump (6) and the intermediate receiving tank (9) are respectively communicated to the interior of the toluene recovery tank (2) through a conveying process liquid pipeline.
2. The benzene recovery device for heat transfer oil production according to claim 1, characterized in that: the device is provided with a recovery tank condenser (10), wherein the recovery tank condenser (10) is communicated with the toluene recovery tower (3), one end of the recovery tank condenser is communicated with a circulating water upper water pipe (15), and the other end of the recovery tank condenser is communicated with a circulating water lower water pipe.
3. The benzene recovery device for heat transfer oil production according to claim 2, characterized in that: the outlet end of the toluene recovery tower (3) is sequentially communicated with the first after-cooler (11) of the recovery tank and the second after-cooler (12) of the recovery tank through a vent pipeline, and is communicated with the vent pipeline at the other end, wherein the first after-cooler (11) of the recovery tank is communicated with the second after-cooler (12) of the recovery tank through the vent pipeline, and the vent pipeline is used for discharging gas.
4. The benzene recovery device for heat transfer oil production according to claim 3, characterized in that: the system also comprises a chilled water feeding pipe inlet pipe (13) and a chilled water drainage pipe outlet pipe, wherein the inlet end of the second aftercooler (12) of the recovery tank is communicated with the inlet end of the chilled water feeding pipe inlet pipe, and the outlet end of the second aftercooler is communicated with the outlet end of the chilled water drainage pipe outlet pipe.
5. The benzene recovery device for heat transfer oil production according to claim 3, characterized in that: the inlet end of the first aftercooler (11) of the recovery tank is communicated with the inlet end of the circulating water upper water pipe (15), and the outlet end of the first aftercooler is communicated with the outlet end of the circulating water lower water pipe.
6. The benzene recovery device for heat transfer oil production according to claim 1, characterized in that: the device is also provided with a low-pressure steam pipeline (16) and a low-pressure nitrogen pipeline (17), which are respectively and independently provided with a conveying pipeline communicated to the interior of the toluene recovery tank (2).
7. The benzene recovery device for heat transfer oil production according to claim 3, characterized in that: the device also comprises a micro-pressure nitrogen pipeline (14) communicated to the inside of the emptying pipeline passing through the second aftercooler (12) of the recovery tank through a conveying pipeline and used for conveying micro-pressure nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020761023.5U CN212403975U (en) | 2020-05-08 | 2020-05-08 | Benzene recovery unit is used in conduction oil production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020761023.5U CN212403975U (en) | 2020-05-08 | 2020-05-08 | Benzene recovery unit is used in conduction oil production |
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| Publication Number | Publication Date |
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| CN212403975U true CN212403975U (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020761023.5U Active CN212403975U (en) | 2020-05-08 | 2020-05-08 | Benzene recovery unit is used in conduction oil production |
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| CN (1) | CN212403975U (en) |
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- 2020-05-08 CN CN202020761023.5U patent/CN212403975U/en active Active
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