CN214734462U - Propylene unloading and conveying device system - Google Patents
Propylene unloading and conveying device system Download PDFInfo
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- CN214734462U CN214734462U CN202023321842.7U CN202023321842U CN214734462U CN 214734462 U CN214734462 U CN 214734462U CN 202023321842 U CN202023321842 U CN 202023321842U CN 214734462 U CN214734462 U CN 214734462U
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Abstract
The application discloses propylene conveying device system that unloads, including propylene spherical tank, propylene groove tank car and compression system that unloads, the liquid phase import of propylene spherical tank passes through the tube coupling with the bottom liquid phase export of propylene groove tank car, compression system that unloads includes that propylene divides the fluid reservoir, compressor and high-pressure gas buffer tank, the middle part air inlet that propylene divides the fluid reservoir is connected by the tube coupling through valve one and the top gas outlet of propylene spherical tank, the top gas outlet that propylene divides the fluid reservoir passes through valve five and is connected by the tube coupling with the compressor import, the compressor export is connected by the tube coupling through the top air inlet of high-pressure gas buffer tank and propylene groove tank car. The device system of this application has thoroughly solved the problem that the compressor starts to need the middle shut down to discharge liquid propylene to torch incineration, under the condition that does not increase other energy consumptions, divides the fluid reservoir to follow earlier propylene gas-liquid separation through propylene, recycles the high-pressure gas of compressor export, and the liquid pressure that collects with propylene divides the fluid reservoir returns to propylene spherical tank and retrieves, realizes the zero release.
Description
Technical Field
The application relates to a propylene unloading and conveying device system.
Background
Propylene is one of basic raw materials of petrochemical industry, and can be used for producing various important organic chemical raw materials, such as acrylonitrile, propylene oxide, cumene, butanol, octanol and the like. Since propylene is a basic raw material, general chemical enterprises directly reprocess propylene sold in the market. Propylene is transported from the raw material producer to the requesting party, typically by rail, road, in the form of tank cars. After the propylene raw material is transported to a demand place, the propylene raw material in the tank car is unloaded, stored and produced.
The main operation mode of enterprises is to unload the liquid propylene in the tank car into a propylene ball tank through an unloading platform for temporary storage and then convey the liquid propylene to a downstream production device through a transfer pump. Because the pressure in the tank car is basically the same as the pressure in the propylene spherical tank under normal conditions, the propylene gas in the spherical propylene tank needs to be extracted by a propylene compressor, and then the propylene gas is pressurized and pumped to the top of the tank car to pressurize the tank car, so that the propylene liquid is pressed into the propylene spherical tank to realize unloading operation.
However, in current practical use, a large amount of liquid propylene is often accumulated in an inlet pipeline of a compressor under the conditions of large temperature difference between day and night or rain at night, the liquid propylene is easily sucked into the inlet of the propylene compressor when the compressor is restarted the next day, the compressor can only compress gas, and if liquid enters the compressor, the liquid hits a top cylinder and even explodes, so that the compressor needs to be stopped at present when the compressor is started every time, the liquid propylene accumulated in the inlet pipeline is discharged to a torch for burning, and then the compressor is started until all the liquid in the inlet pipeline is discharged. The unloading situation not only causes the waste of propylene torch incineration and prolongs the unloading time, but also has serious potential safety hazard problem.
Disclosure of Invention
In view of the above technical problems in the prior art, an object of the present application is to provide a propylene unloading conveyor system.
The propylene unloading and conveying device system is characterized by comprising a propylene spherical tank, a propylene tank truck and an unloading and compressing system, wherein a liquid phase inlet of the propylene spherical tank is connected with a bottom liquid phase outlet of the propylene tank truck through a pipeline, a top gas outlet of the propylene spherical tank is connected with a top gas inlet of the propylene tank truck through the unloading and compressing system through a pipeline, the unloading and compressing system comprises a propylene separating tank, a compressor and a high-pressure gas buffer tank, a middle gas inlet of the propylene separating tank is connected with a top gas outlet of the propylene spherical tank through a valve I through a pipeline, a bottom liquid outlet of the propylene separating tank is provided with a valve IV for discharging liquid outwards, a top gas outlet of the propylene separating tank is connected with a compressor inlet through a valve V through a pipeline, and a compressor outlet is connected with a top gas inlet of the propylene tank truck through the high-pressure gas buffer tank through a pipeline, the unloading compression system can pump out and pressurize propylene gas in the propylene ball tank into high-pressure gas, then fill the high-pressure gas into the propylene tank car and press propylene liquid in the propylene tank car into the propylene ball tank.
The propylene unloading and conveying device system is characterized in that the unloading and compressing system further comprises an air inlet buffer tank, and a liquid outlet at the bottom of the air inlet buffer tank is provided with a valve ten for discharging liquid outwards; an air outlet at the top of the propylene spherical tank is connected with an air inlet pipeline, an outlet of the air inlet pipeline is divided into two paths, one path is connected with a middle air inlet of the propylene liquid separating tank through a first valve by a pipeline, and the other path is connected with a middle air inlet of the air inlet buffer tank through a second valve by a pipeline; the inlet of the compressor is divided into two paths, one path is connected with the top air outlet of the propylene liquid separating tank through a valve five by a pipeline, and the other path is connected with the top air outlet of the air inlet buffer tank through a valve nine by a pipeline.
The propylene unloading and conveying device system is characterized by further comprising a main liquid unloading pipeline, wherein an inlet of the main liquid unloading pipeline is divided into two paths, one path is connected with a bottom liquid outlet of the air inlet buffer tank through a valve ten by a pipeline, and the other path is connected with a bottom liquid outlet of the propylene liquid separating tank through a valve four by a pipeline; the middle part of the total liquid discharging pipeline is provided with a one-way valve and an eighth valve, and the outlet of the total liquid discharging pipeline is connected with the propylene spherical tank so as to discharge propylene liquid collected in the gas inlet buffer tank or the propylene liquid separating tank into the propylene spherical tank.
The propylene unloading and conveying device system is characterized in that an outlet of the compressor is connected with an inlet in the middle of one side of a high-pressure gas buffer tank through a pipeline, and an outlet in the middle of the other side of the high-pressure gas buffer tank is connected with a top gas inlet of a propylene tank car through a loading gas-phase pipeline; a pressure relief branch pipe is connected to the loading gas phase pipeline, and a valve seventh is arranged on the pressure relief branch pipe; the outlet of the pressure relief branch pipe is divided into two paths, the first path is connected to a pipeline between the second valve and the middle air inlet of the air inlet buffer tank through a pressure relief branch pipe outlet pipe A provided with a third valve, and the second path is connected to a pipeline between the first valve and the middle air inlet of the propylene liquid separating tank through a pressure relief branch pipe outlet pipe B provided with a sixth valve.
The propylene unloading and conveying device system is characterized in that the volume of the propylene liquid separating tank is 5-10 times of that of the air inlet buffer tank.
Compared with the prior art, the beneficial effect that this application was got is:
1) adopt the device system of this application, liquid propylene gets into propylene branch fluid reservoir earlier and carries out gas-liquid separation after the start-up compressor, because the volume of propylene branch fluid reservoir is great, it can be collected the storage with compressor entry pipeline accumulation's a large amount of liquid propylene totally. When liquid in the propylene liquid separating tank needs to be discharged, the valve I and the valve V are closed, and the valve II and the valve nine are opened, so that the inlet of the compressor is communicated with the top air outlet of the propylene spherical tank through the air inlet buffer tank with relatively small volume, and the propylene unloading and conveying work can be normally operated. And then, a part of high-pressure gas at the outlet of the compressor is separated out, and is filled into a propylene separating tank to pressurize the propylene separating tank, and liquid collected by the propylene separating tank is pressed back into a propylene spherical tank to be recovered through certain pressure.
2) By adopting the device system, the problem that the liquid propylene is discharged to the torch for incineration when the compressor is started and needs to be stopped in the middle is thoroughly solved.
3) Under the condition that does not increase other energy consumptions, divide the fluid reservoir to earlier propylene gas-liquid separation through propylene, recycle the higher pressure gas of compressor export, press the liquid that propylene divides the fluid reservoir to collect back to propylene spherical tank and retrieve, really realized the zero release, reduced the pollution to the environment, reduced the raw materials loss simultaneously, reduced the waste. In addition, the compressor can be realized without stopping in the unloading process, and the unloading efficiency is improved.
Drawings
FIG. 1 is a schematic structural view of a propylene unloading conveyor system according to the present application;
in fig. 1: 1-valve I, 2-valve II, 3-valve III, 4-valve IV, 5-valve V, 6-valve VI, 7-valve VII, 8-valve VIII, 9-valve VII, 10-valve VIII, 11-high-pressure gas buffer tank, 12-propylene liquid separation tank, 13-gas inlet buffer tank, 14-gas inlet pipeline, 15-total liquid discharge pipeline, 16-compressor, 17-loading gas phase pipeline and 18-pressure discharge branch pipe.
Detailed Description
The present invention is further illustrated by the following examples, which should not be construed as limiting the scope of the invention.
Example (b): compare FIG. 1
A propylene unloading and conveying device system comprises a propylene spherical tank, a propylene tank truck and an unloading and compressing system, wherein a liquid phase inlet of the propylene spherical tank is connected with a bottom liquid phase outlet of the propylene tank truck through a pipeline, a top gas outlet of the propylene spherical tank is connected with a top gas inlet of the propylene tank truck through the unloading and compressing system through a pipeline, the unloading and compressing system comprises a propylene separating tank 12, a compressor 16 and a high-pressure gas buffer tank 11, a middle gas inlet of the propylene separating tank 12 is connected with a top gas outlet of the propylene spherical tank through a valve I1 through a pipeline, a bottom liquid outlet of the propylene separating tank 12 is provided with a valve IV 4 for discharging liquid outwards, a top gas outlet of the propylene separating tank 12 is connected with an inlet of the compressor 16 through a valve V5 through a pipeline, an outlet of the compressor 16 is connected with a top gas inlet of the propylene tank truck through the high-pressure gas buffer tank 11 through a pipeline, the unloading compression system can pump out and pressurize propylene gas in the propylene ball tank into high-pressure gas, then fill the high-pressure gas into the propylene tank car and press propylene liquid in the propylene tank car into the propylene ball tank.
In practical applications, the volume of the propylene partial tank 12 can be designed to be 2m3Thereby substantially containing the bulk of the liquid propylene accumulated in the compressor inlet line. After the compressor is started, liquid propylene accumulated in an inlet pipeline of the compressor firstly enters the propylene liquid separating tank to be subjected to gas-liquid separation, the separated gas is pumped out by the compressor 16 and pressurized to form high-pressure gas, and the high-pressure gas passes through the high-pressure gas buffer tank 11 and then enters the propylene tank truck through a pipeline from a top gas inlet of the propylene tank truck. Because the liquid phase outlet at the bottom of the propylene tank truck is communicated with the liquid phase inlet of the propylene spherical tank through a pipeline, the high-pressure gas can press the propylene liquid in the propylene tank truck into the propylene spherical tank.
Further, the unloading compression system of the present application further comprises an intake buffer tank 13. In comparison with fig. 1, a valve ten 10 for discharging liquid outwards is arranged at a liquid outlet at the bottom of the inlet buffer tank 13.
An air outlet at the top of the propylene spherical tank is connected with an air inlet pipeline 14, an outlet of the air inlet pipeline 14 is divided into two paths, one path is connected with an air inlet at the middle part of the propylene liquid separating tank 12 through a valve I1 by a pipeline, and the other path is connected with an air inlet at the middle part of the air inlet buffer tank 13 through a valve II 2 by a pipeline. The inlet of the compressor 16 is divided into two paths, one path is connected with the top air outlet of the propylene liquid separation tank 12 through a valve five 5 by a pipeline, and the other path is connected with the top air outlet of the air inlet buffer tank 13 through a valve nine 9 by a pipeline.
In practical applications, the volume of the intake buffer tank 13 is relatively small, and the volume can be designed to be 0.25m3. The area used in factory production is limited, and the invention designs that two large and small tank bodies of the propylene separating tank 12 and the air inlet buffer tank 13 are matched for use, so that the area used can be saved as much as possible under the condition of ensuring normal production. During normal operation, the propylene separation tank 12 is used for production operation, but when a certain amount of propylene is accumulated in the propylene separation tank 12When liquid needs to be discharged, the inlet line of the compressor 16 can be switched to be connected with the inlet buffer tank 13 to ensure continuous normal production.
Referring to fig. 1, the apparatus system of the present application further includes a main liquid discharging line 15, an inlet of the main liquid discharging line 15 is divided into two paths, one path is connected to a bottom liquid outlet of the inlet buffer tank 13 through a valve ten 10, and the other path is connected to a bottom liquid outlet of the propylene liquid separating tank 12 through a valve four 4; the middle part of the total liquid discharging pipeline 15 is provided with a one-way valve and a valve eight 8, and the outlet of the total liquid discharging pipeline 15 is connected with the propylene spherical tank so as to discharge the propylene liquid collected in the gas inlet buffer tank 13 or the propylene liquid separating tank 12 into the propylene spherical tank.
Referring to fig. 1, an outlet of a compressor 16 is connected with an inlet at the middle part of one side of a high-pressure gas buffer tank 11 through a pipeline, and an outlet at the middle part of the other side of the high-pressure gas buffer tank 11 is connected with a top gas inlet of a propylene tank truck through a loading gas phase pipeline 17; a pressure relief branch pipe 18 is connected to the loading gas phase pipeline 17, and a valve seven 7 is arranged on the pressure relief branch pipe 18; the outlet of the pressure relief branch pipe 18 is divided into two paths, the first path is connected to a pipeline between the second valve 2 and the middle air inlet of the air inlet buffer tank 13 through a pressure relief branch pipe outlet pipe A provided with a third valve 3, and the second path is connected to a pipeline between the first valve 1 and the middle air inlet of the propylene separating tank 12 through a pressure relief branch pipe outlet pipe B provided with a sixth valve 6.
The utility model provides a propylene divides fluid reservoir 12 and the buffer tank 13 alternate use that admits air, and propylene divides fluid reservoir 12 to be the jar body of main use in the production, and the buffer tank 13 that admits air is the jar body of auxiliary use in the production.
When the propylene liquid separating tank 12 needs to discharge liquid, the valve I1 and the valve V5 are closed, and simultaneously, the valve II 2 and the valve nine 9 are opened, so that the inlet of the compressor 16 is communicated with the top air outlet of the propylene spherical tank through the air inlet buffer tank 13 with relatively small volume, and the propylene unloading and conveying work can be normally operated. Then, a seventh valve 7 on the pressure relief branch pipe 18 and a sixth valve 6 on an outlet pipe B of the pressure relief branch pipe are opened, a part of high-pressure gas is filled into the propylene liquid separation tank 12, a fourth valve 4 at the bottom of the propylene liquid separation tank 12 and a one-way valve and an eighth valve 8 on the main liquid discharge pipeline 15 are opened, and propylene liquid accumulated in the propylene liquid separation tank 12 is pressed into the propylene spherical tank. When the liquid discharge in the propylene component liquid tank 12 is finished, the inlet pipeline of the compressor 16 can be switched to be communicated with the propylene component liquid tank 12 again.
The statements in this specification merely set forth a list of implementations of the inventive concept and the scope of the present invention should not be construed as limited to the particular forms set forth in the examples.
Claims (5)
1. The utility model provides a propylene conveyor system that unloads, its characterized in that includes propylene spherical tank, propylene groove tank car and compression system that unloads, the liquid phase import of propylene spherical tank passes through the tube coupling with the bottom liquid phase export of propylene groove tank car, and the top gas outlet of propylene spherical tank passes through the compression system that unloads is by the tube coupling with the top air inlet of propylene groove tank car, the compression system that unloads includes that propylene divides fluid reservoir (12), compressor (16) and high-pressure gas buffer tank (11), and the middle part air inlet of propylene divides fluid reservoir (12) is by the tube coupling through valve one (1) and the top gas outlet of propylene spherical tank, and the bottom liquid outlet of propylene divides fluid reservoir (12) sets up valve four (4) that are used for outwards tapping, and the top gas outlet of propylene divides fluid reservoir (12) is by the tube coupling through valve five (5) and compressor (16) import, and compressor (16) export is passed through high-pressure gas buffer tank (11) and the top of propylene groove tank car are by the pipe tank car And the unloading compression system can pump out the propylene gas in the propylene ball tank and pressurize the propylene gas into high-pressure gas, then the high-pressure gas is filled into the propylene tank truck, and the propylene liquid in the propylene tank truck is pressed into the propylene ball tank.
2. The propylene unloading and conveying device system as claimed in claim 1, wherein the unloading and compressing system further comprises a gas inlet buffer tank (13), a liquid outlet at the bottom of the gas inlet buffer tank (13) is provided with a valve ten (10) for discharging liquid outwards; an air outlet at the top of the propylene spherical tank is connected with an air inlet pipeline (14), an outlet of the air inlet pipeline (14) is divided into two paths, one path is connected with a middle air inlet of the propylene liquid separating tank (12) through a first valve (1) by a pipeline, and the other path is connected with a middle air inlet of an air inlet buffer tank (13) through a second valve (2) by a pipeline; the inlet of the compressor (16) is divided into two paths, one path is connected with the top air outlet of the propylene liquid separating tank (12) through a valve five (5) by a pipeline, and the other path is connected with the top air outlet of the air inlet buffer tank (13) through a valve nine (9) by a pipeline.
3. The propylene unloading and conveying device system according to claim 2, further comprising a total liquid unloading pipeline (15), wherein an inlet of the total liquid unloading pipeline (15) is divided into two paths, one path is connected with a bottom liquid outlet of the gas inlet buffer tank (13) through a valve ten (10) by a pipeline, and the other path is connected with a bottom liquid outlet of the propylene liquid separating tank (12) through a valve four (4) by a pipeline; the middle part of the main liquid discharging pipeline (15) is provided with a one-way valve and an eighth valve (8), and the outlet of the main liquid discharging pipeline (15) is connected with the propylene spherical tank so as to discharge the propylene liquid collected in the gas inlet buffer tank (13) or the propylene liquid separating tank (12) into the propylene spherical tank.
4. The propylene unloading and conveying device system according to claim 2, wherein the outlet of the compressor (16) is connected with the inlet of the middle part of one side of the high-pressure gas buffer tank (11) through a pipeline, and the outlet of the middle part of the other side of the high-pressure gas buffer tank (11) is connected with the top gas inlet of the propylene tank car through a loading gas phase pipeline (17); a pressure relief branch pipe (18) is connected to the loading gas phase pipeline (17), and a valve seven (7) is arranged on the pressure relief branch pipe (18); the outlet of the pressure relief branch pipe (18) is divided into two paths, the first path is connected to a pipeline between the valve II (2) and the middle air inlet of the air inlet buffer tank (13) through a pressure relief branch pipe outlet pipe A provided with a valve III (3), and the second path is connected to a pipeline between the valve I (1) and the middle air inlet of the propylene liquid separation tank (12) through a pressure relief branch pipe outlet pipe B provided with a valve VI (6).
5. A propylene unloading conveyor system as claimed in claim 2, wherein the volume of the propylene partial tank (12) is 5 to 10 times the volume of the intake buffer tank (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023321842.7U CN214734462U (en) | 2020-12-31 | 2020-12-31 | Propylene unloading and conveying device system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023321842.7U CN214734462U (en) | 2020-12-31 | 2020-12-31 | Propylene unloading and conveying device system |
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| Publication Number | Publication Date |
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| CN214734462U true CN214734462U (en) | 2021-11-16 |
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| CN202023321842.7U Active CN214734462U (en) | 2020-12-31 | 2020-12-31 | Propylene unloading and conveying device system |
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| CN (1) | CN214734462U (en) |
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