CN214580429U - Butadiene unloading and recovery system - Google Patents
Butadiene unloading and recovery system Download PDFInfo
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- CN214580429U CN214580429U CN202023315628.0U CN202023315628U CN214580429U CN 214580429 U CN214580429 U CN 214580429U CN 202023315628 U CN202023315628 U CN 202023315628U CN 214580429 U CN214580429 U CN 214580429U
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Abstract
The utility model relates to a butadiene unloads and recovery system, recovery system includes spherical tank, tank car, compressor, unit pipeline and recovery unit pipeline of unloading, in the unit pipeline of unloading, the induction port of compressor is connected with the gas outlet at the spherical tank top, the gas outlet of compressor is connected with tank car top; in the recovery unit pipeline, a gas suction port of the compressor is connected with the top of the tank car, and a gas outlet of the compressor is connected with the top of the spherical tank. The utility model adopts the butadiene compressor to extract and pressurize the butadiene gas from the top of the spherical tank, and then the liquid phase butadiene in the tank car is pressed into the spherical tank; after unloading is finished, gas-phase butadiene in the spherical tank is also recycled to the spherical tank by the compressor, extra discharge and waste cannot be caused in the whole process, increasingly strict environmental protection requirements are met, and meanwhile, a compressor process system meeting the standard is selected according to the characteristics of butadiene, so that the reliable operation of the butadiene compressor is met.
Description
Technical Field
The utility model relates to a compressor application technology field, concretely relates to butadiene unloads and recovery system.
Background
Butadiene, i.e., 1, 3-butadiene, is a raw material for producing synthetic rubber, synthetic resin, nylon, and the like, and is a very important chemical raw material. At present, a groove tank car is mostly adopted for transporting butadiene, and a spherical tank is mostly adopted for storing butadiene. At present, the following problems occur during the unloading of butadiene: (1) the air pressure in the ball tank is greater than that in the tank car, so that the liquid phase butadiene in the tank car cannot enter the tank car; (2) after the liquid phase in the tank truck is emptied, gas-phase butadiene can remain in the tank truck, and the butadiene is difficult to enter the spherical tank, so that great waste is caused.
Therefore, there is a need in the art for a butadiene unloading and recycling system that addresses the above-mentioned deficiencies.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a butadiene is unloaded and recovery system in order to overcome the defect that above-mentioned prior art exists.
In order to achieve the purpose of the present invention, the present application provides the following technical solutions.
In a first aspect, the application provides a butadiene unloading and recovery system, which comprises a spherical tank and a tank car, and is characterized in that the system is provided with a compressor, an unloading unit pipeline and a recovery unit pipeline, wherein in the unloading unit pipeline, an air suction port of the compressor is connected with an air outlet at the top of the spherical tank, and an air outlet of the compressor is connected with the top of the tank car; in the recovery unit pipeline, a gas suction port of the compressor is connected with the top of the tank car, and a gas outlet of the compressor is connected with the top of the spherical tank. Through above-mentioned system, can realize the following operation: 1. the compressor is pumped and pressurized from gas phase butadiene at the top of the butadiene spherical tank and then pressed into the top of the butadiene tank car, and the liquid phase of the butadiene tank car is pressed into the butadiene spherical tank through a liquid phase pipeline to finish the unloading of the liquid phase; 2. after the liquid phase of the tank car is completely discharged, the butadiene gas with pressure in the tank car is remained and needs to be recovered; the compressor recovers and pressurizes butadiene from a gas phase pipeline at the top of the butadiene tank, and then presses the butadiene into the butadiene spherical tank, and the pressure in the tank truck is reduced to a designated pressure to complete recovery.
In an embodiment of the first aspect, the compressor is a single screw compressor provided with an air inlet, an air outlet and an oil inlet. Because butadiene is extremely easy to self-polymerize, the main shaft bearing of the single-screw compressor head adopts an external type which is not contacted with butadiene and adopts oil bath lubrication; meanwhile, the star wheel bearing adopts a wear-resistant sliding bearing. And because the butadiene gas is toxic and is not allowed to leak, the single-screw compressor head adopts double-end-face mechanical sealing. In order to overcome the self-polymerization of butadiene and the corrosiveness to rubber, a rubber sealing ring of the single-screw compressor is sealed by using perfluorinated rubber.
In an embodiment of the first aspect, the single screw compressor is provided with a lubricating oil circulation unit, the lubricating oil circulation unit comprises an oil-gas separator, a gas outlet is arranged at the top of the oil-gas separator, a filter element is arranged at the gas outlet, the gas outlet is connected with the top of the tank truck or the top of the spherical tank, and the bottom of the oil-gas separator is connected with an oil inlet of the single screw compressor.
In one embodiment of the first aspect, a cooler and a filter are arranged on the connection pipeline between the bottom of the oil separator and the single-screw compressor.
In one embodiment of the first aspect, the filter is a duplex filter.
In one embodiment of the first aspect, the filter element is a dual filter element, which performs dual filtration to control the oil content of the exhaust gas to 0.5 ppm.
In an embodiment of the first aspect, the single screw compressor is provided with a purging unit, the purging unit includes a nitrogen source, the nitrogen source is connected with an air inlet of the single screw compressor, and an air outlet of the single screw compressor is connected with the top of the spherical tank.
Compared with the prior art, the beneficial effects of the utility model reside in that:
pumping and pressurizing butadiene gas from the top of the spherical tank by using a butadiene compressor, and pressing liquid phase butadiene in the tank car into the spherical tank; after unloading is finished, gas-phase butadiene in the spherical tank is also recycled to the spherical tank by the compressor, extra discharge and waste cannot be caused in the whole process, increasingly strict environmental protection requirements are met, and meanwhile, a compressor process system meeting the standard is selected according to the characteristics of butadiene, so that the reliable operation of the butadiene compressor is met.
Drawings
Fig. 1 is a schematic structural diagram of the system of the present application.
In the drawing, 1 is a tank car, 2 is a spherical tank, 3 is a first switch valve, 4 is a second switch valve, 5 is a third switch valve, 6 is a first pressure transmitter, 7 is a first check valve, 8 is a single screw compressor, 9 is a motor, 10 is a second check valve, 11 is a second pressure transmitter, 12 is a temperature sensor, 13 is an oil-gas separator, 14 is a filter element, 15 is a liquid level meter, 16 is a cooler, 17 is a duplex filter, 18 is a first regulating valve, 19 is a third pressure transmitter, 20 is a second regulating valve, 21 is a third check valve, 22 is a fourth switch valve, 23 is a third regulating valve, 24 is a fifth switch valve, 25 is a fourth check valve, 26 is an evacuation valve, and 27 is a nitrogen source.
Detailed Description
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as is understood by those of ordinary skill in the art to which the invention belongs. All numerical values recited herein as between the lowest value and the highest value are intended to mean all values between the lowest value and the highest value in increments of one unit when there is more than two units difference between the lowest value and the highest value.
In the following description of the embodiments of the present invention, it is noted that in the detailed description of the embodiments, all the features of the actual embodiments may not be described in detail in order to make the description concise and concise. Modifications and substitutions may be made to the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the invention, and the resulting embodiments are within the scope of the invention.
Examples
The embodiments of the present invention will be described in detail below, and the embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following embodiments.
Example 1
A butadiene unloading and recycling system is structurally shown in figure 1 and aims to discharge liquid-phase butadiene in a tank truck 1 into a spherical tank 2, discharge residual gas-phase butadiene in the tank truck 1 into the spherical tank 2, and perform nitrogen purging on the whole system to exhaust the butadiene. The system comprises a spherical tank 2, a tank car 1, a compressor, an unloading unit pipeline, a recovery unit pipeline and a purging pipeline, and has the following specific structure:
unloading unit pipeline: the bottom of the tank car 1 is communicated with a spherical tank 2 for conveying liquid phase butadiene; the top of the spherical tank 2 is connected with an air inlet of a single-screw compressor 8 through a second switch valve 4, a first pressure transmitter 6 and a first check valve 7 are arranged at the air inlet of the single-screw compressor 8, an air outlet of the single-screw compressor 8 is connected with an oil-gas separator 13 through a second check valve 10, and a second pressure transmitter 11 and a temperature sensor 12 are arranged at the air inlet of the oil-gas separator 13. The upper outlet of the oil-gas separator 13 is provided with a filter element 14, the bottom of the oil-gas separator is communicated with an oil inlet of the single-screw compressor 8, a cooler 16, a duplex filter 17, a first regulating valve 18 and a third pressure transmitter 19 are arranged on a connecting pipeline, and the oil-gas separator 13 is provided with a liquid level meter 15. The air outlet at the top of the oil-gas separator 13 is provided with a second regulating valve 20 and a third check valve 21, and is connected with the top of the tank truck 1 through a fourth switching valve 22.
Recovery unit pipeline: the top of the tank truck 1 is connected with an air inlet of a single-screw compressor 8 through a first switch valve 3, a first pressure transmitter 6 and a first check valve 7 are arranged at the air inlet of the single-screw compressor 8, an air outlet of the single-screw compressor 8 is connected with an oil-gas separator 13 through a second check valve 10, and a second pressure transmitter 11 and a temperature sensor 12 are arranged at the air inlet of the oil-gas separator 13. The upper outlet of the oil-gas separator 13 is provided with a filter element 14, the bottom of the oil-gas separator is communicated with an oil inlet of the single-screw compressor 8, a cooler 16, a duplex filter 17, a first regulating valve 18 and a third pressure transmitter 19 are arranged on a connecting pipeline, and the oil-gas separator 13 is provided with a liquid level meter 15. And a second regulating valve 20 and a third check valve 21 are arranged at an air outlet at the top of the oil-gas separator 13 and are connected with the top of the spherical tank 2 through a fifth switch valve 24.
Purging a pipeline: the nitrogen source 27 is connected with the air inlet of the single-screw compressor 8 through the third switching valve 5, the first pressure transmitter 6 and the first check valve 7 are arranged at the air inlet of the single-screw compressor 8, the air outlet of the single-screw compressor 8 is connected with the oil-gas separator 13 through the second check valve 10, and the second pressure transmitter 11 and the temperature sensor 12 are arranged at the air inlet of the oil-gas separator 13. The upper outlet of the oil-gas separator 13 is provided with a filter element 14, the bottom of the oil-gas separator is communicated with an oil inlet of the single-screw compressor 8, a cooler 16, a duplex filter 17, a first regulating valve 18 and a third pressure transmitter 19 are arranged on a connecting pipeline, and the oil-gas separator 13 is provided with a liquid level meter 15. And a second regulating valve 20 and a third check valve 21 are arranged at the air outlet at the top of the oil-gas separator 13 and are communicated with the top of the spherical tank 2 through a third regulating valve 23 and a fourth check valve 25.
In addition, the top of the oil-gas separator 13 is also provided with a pressure relief port, and the pressure relief port is connected with the spherical tank 2 through an exhaust valve 26.
The working principle of the system is as follows:
1. unloading working conditions are as follows: the second switch valve 4 and the fourth switch valve 22 are opened by an automatic control system, the first switch valve 3, the third switch valve 5 and the fifth switch valve 24 are closed, the motor 9 of the single-screw compressor 8 starts to be started, gas-phase butadiene at the top of the spherical tank 2 is sucked into a machine head air suction port of the single-screw compressor 8 through the second switch valve 4 and the first check valve 7, is mixed with lubricating oil and pressurized and then is discharged out of the machine head of the single-screw compressor 8, enters the oil-gas separator 13 through the second check valve 10, and after separation and filtration, butadiene gas passes through the second regulating valve 20, the third check valve 21 and the fourth switch valve 22 from the top to the butadiene tank car 1, liquid-phase butadiene is pressed into the spherical tank 2, and after the liquid level of the tank car 1 is reduced, the compressor is stopped, and the unloading process is completed. When the discharge pressure of the single-screw compressor 8 is ultrahigh, the third regulating valve 23 is opened, and the high-pressure butadiene is discharged back to the butadiene spherical tank 2 through the fourth check valve 25; in the oil-gas separator 13, the lubricating oil is deposited at the bottom, passes through the cooler 16, the duplex filter 17 and the first regulating valve 18 under the action of pressure difference, and is sprayed into the single-screw compressor 8 through the oil inlet of the single-screw compressor 8, so that the lubricating oil can be recycled.
2. And (3) recovery working condition: the automatic control system opens the first switch valve 3 and the fifth switch valve 24, closes the second switch valve 4, the third switch valve 5 and the fourth switch valve 22, the motor 9 of the single-screw compressor 8 starts to start, residual gas-phase butadiene in the tank car 1 is sucked into a machine head air suction port of the single-screw compressor 8 through the first switch valve 3 and the first check valve 7, is mixed with lubricating oil and pressurized and then is discharged out of the machine head of the single-screw compressor 8, enters the oil-gas separator 13 through the second check valve 10, and after separation and filtration, butadiene gas passes through the second adjusting valve 20, the third check valve 21 and the fifth switch valve 24 from the top to the butadiene spherical tank 2. Along with the pumping pressure of the single-screw compressor 8, after the pressure of the gas-phase butadiene in the tank car 1 is reduced to a specified value (measured by a first pressure transmitter 6 at the inlet of the single-screw compressor 8), the single-screw compressor 8 is stopped, and the recovery process is finished; in the oil-gas separator 13, the lubricating oil is deposited at the bottom, passes through the cooler 16, the duplex filter 17 and the first regulating valve 18 under the action of pressure difference, and is sprayed into the single-screw compressor 8 through the oil inlet of the single-screw compressor 8, so that the lubricating oil can be recycled.
3. Purging working conditions: due to the fact that butadiene is toxic and self-polymerized, after the single-screw compressor 8 stops, the control system automatically controls the first switch valve 3, the second switch valve 4, the fourth switch valve 22 and the fifth switch valve 24 to be closed, the nitrogen source 27 is turned on, the third switch valve 5 and the third adjusting valve 23 are turned on, and the butadiene in the system is blown out to the spherical tank 2 by the nitrogen, so that safety is guaranteed.
The embodiments described above are intended to facilitate the understanding and appreciation of the application by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present application is not limited to the embodiments herein, and those skilled in the art who have the benefit of this disclosure will appreciate that many modifications and variations are possible within the scope of the present application without departing from the scope and spirit of the present application.
Claims (7)
1. A butadiene unloading and recovery system comprises a spherical tank and a tank car and is characterized in that the system is provided with a compressor, an unloading unit pipeline and a recovery unit pipeline, wherein in the unloading unit pipeline, an air suction port of the compressor is connected with an air outlet at the top of the spherical tank, and an air outlet of the compressor is connected with the top of the tank car; in the recovery unit pipeline, a gas suction port of the compressor is connected with the top of the tank car, and a gas outlet of the compressor is connected with the top of the spherical tank.
2. The butadiene unloading and recovery system of claim 1, wherein the compressor is a single screw compressor having an air inlet, an air outlet, and an oil inlet.
3. The butadiene unloading and recycling system of claim 2, wherein the single screw compressor is provided with a lubricating oil circulation unit, the lubricating oil circulation unit comprises an oil-gas separator, a gas outlet is arranged at the top of the oil-gas separator, a filter element is arranged at the gas outlet, the gas outlet is connected with the top of the tank car or the top of the spherical tank, and the bottom of the oil-gas separator is connected with an oil inlet of the single screw compressor.
4. The butadiene unloading and recycling system of claim 3, wherein a cooler and a filter are arranged on the connecting pipeline between the bottom of the oil-gas separator and the single-screw compressor.
5. The butadiene unloading and recovery system of claim 4, wherein the filter is a duplex filter.
6. The butadiene unloading and recovery system of claim 3, wherein the filter element is a dual filter element.
7. The butadiene unloading and recycling system of claim 2 or 3, wherein the single screw compressor is provided with a purging unit, the purging unit comprises a nitrogen source, the nitrogen source is connected with the gas inlet of the single screw compressor, and the gas outlet of the single screw compressor is connected with the top of the spherical tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023315628.0U CN214580429U (en) | 2020-12-31 | 2020-12-31 | Butadiene unloading and recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023315628.0U CN214580429U (en) | 2020-12-31 | 2020-12-31 | Butadiene unloading and recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214580429U true CN214580429U (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023315628.0U Active CN214580429U (en) | 2020-12-31 | 2020-12-31 | Butadiene unloading and recovery system |
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| Country | Link |
|---|---|
| CN (1) | CN214580429U (en) |
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- 2020-12-31 CN CN202023315628.0U patent/CN214580429U/en active Active
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