CN217130982U - Hexafluoropropylene feeding system - Google Patents
Hexafluoropropylene feeding system Download PDFInfo
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- CN217130982U CN217130982U CN202221041024.8U CN202221041024U CN217130982U CN 217130982 U CN217130982 U CN 217130982U CN 202221041024 U CN202221041024 U CN 202221041024U CN 217130982 U CN217130982 U CN 217130982U
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Abstract
A hexafluoropropylene feeding system comprises a storage tank, a metering pump and a metering tank, wherein the bottom of the storage tank is connected with the metering pump through a first pipeline, a tank car liquid phase connecting pipe is arranged on the first pipeline, the outlet of the metering pump is connected with the metering tank through a second pipeline, the second pipeline is provided with a third valve, the exhaust port of the metering tank is connected with the third pipeline, the third pipeline is provided with a fourth valve, a liquid phase return pipeline is connected with the second pipeline and is positioned at the upstream of the third valve, the liquid phase return pipe is provided with a fifth valve, a pump feeding pipeline is connected with the outlet of the metering pump, the downstream end of the pump is connected with the top of the storage tank, a sixth valve is arranged on the pump feeding pipeline, one end of a gas phase balance pipeline is connected with the third pipeline and positioned at the downstream of the fourth valve, the other end of the gas phase balance pipeline is connected with the top of the storage tank, the gas phase balance pipeline is provided with a seventh valve, an eighth valve and a tank car gas phase connecting pipe. The utility model has the advantages of being simple in structure and convenient in operation, be a safe, efficient hexafluoropropylene feeding system.
Description
Technical Field
The utility model relates to a chemical industry field, in particular to hexafluoropropylene feeding system.
Background
The chemical enterprises use tetrafluoroethylene and hexafluoropropylene to copolymerize to obtain FEP powder. At present, the mode that chemical enterprises provided hexafluoropropylene to reation kettle does, utilizes the hexafluoropropylene steel bottle to connect on the pipeline, directly provides high-pressure hexafluoropropylene to the hexafluoropropylene metering tank. The feeding mode has low efficiency and high labor intensity, and the hexafluoropropylene has toxicity and causes damage to the physical and psychological health of operators.
Therefore, how to design a safe and efficient hexafluoropropylene feeding device is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The utility model aims at providing a hexafluoropropylene feeding system to prior art not enough, its simple structure, convenient operation are a safety, efficient hexafluoropropylene feeding system.
The technical scheme of the utility model is that: a hexafluoropropylene feeding system, including storage tank, measuring pump, metering tank, the bottom of the said storage tank couples to import of the measuring pump through the first pipeline, set up the first valve on the first pipeline, and there are tank car liquid phase connecting pipes, set up the second valve on the tank car liquid phase connecting pipe, the outlet port of the said measuring pump couples to metering tank through the second pipeline, set up the third valve on the second pipeline, the exhaust outlet of the said metering tank provides the gaseous phase hexafluoropropylene through the third pipeline to the outside, set up the fourth valve on the said third pipeline, a liquid phase backflow pipeline couples to second pipeline, locate at the upper reaches of the third valve, set up the fifth valve on the liquid phase backflow pipeline, a pump feed line couples to outlet port of the measuring pump, its downstream end couples to top of the storage tank, set up the sixth valve on the pump feed line, one end of a gaseous phase equilibrium pipeline couples to third pipeline, and the other end of the gas phase balance pipe is connected with the top of the storage tank, the gas phase balance pipeline is provided with a seventh valve and an eighth valve, a tank car gas phase connecting pipe is arranged between the seventh valve and the eighth valve, and a ninth valve is arranged on the tank car gas phase connecting pipe.
Furthermore, the second pipeline is connected with an air-pumping and nitrogen-charging mechanism which is positioned at the upstream of the third valve.
Furthermore, the third pipeline is connected with an evacuation and nitrogen charging mechanism which is positioned at the downstream of the fourth valve.
Specifically, the evacuation and nitrogen filling mechanism comprises a three-way valve, a first port of the three-way valve is connected with the second pipeline or the third pipeline, a second port of the three-way valve is connected with the vacuum source, and a third port of the three-way valve is connected with the nitrogen source.
Further, a liquid level meter is arranged on the storage tank.
Adopt above-mentioned technical scheme to have following beneficial effect:
1. the hexafluoropropylene feeding system comprises a storage tank, a metering pump and a metering tank, wherein the storage tank is used for temporarily storing liquid hexafluoropropylene, and the metering pump is used for metering the liquid hexafluoropropylene in the storage tank to be output or transferring the liquid hexafluoropropylene in the tank car to the storage tank for standby. The bottom of the storage tank is connected with an inlet of the metering pump through a first pipeline, a first valve is arranged on the first pipeline, a tank car liquid phase connecting pipe is arranged on the first pipeline and is used for being connected with a liquid phase port of the tank car, and a second valve is arranged on the tank car liquid phase connecting pipe. The outlet of the metering pump is connected with the metering tank through a second pipeline, a third valve is arranged on the second pipeline, liquid hexafluoropropylene in the storage tank can be metered and conveyed into the metering tank through the metering pump, the gas phase hexafluoropropylene is externally provided to the exhaust port of the metering tank through a third pipeline, and a fourth valve is arranged on the third pipeline. And a liquid phase return pipeline is connected with the second pipeline and is positioned at the upstream of the third valve, a fifth valve is arranged on the liquid phase return pipeline, and the liquid phase return pipeline is in a closed state when liquid hexafluoropropylene in the storage tank is output. And a pump feeding pipeline is connected with the outlet of the metering pump, the downstream end of the pump feeding pipeline is connected with the top of the storage tank, and a sixth valve is arranged on the pump feeding pipeline and used for transferring the liquid hexafluoropropylene of the tank car to the storage tank for standby. One end of a gas phase balance pipeline is connected with the third pipeline and located at the downstream of the fourth valve, the other end of the gas phase balance pipe is connected with the top of the storage tank, the gas phase balance pipeline is provided with a seventh valve and an eighth valve, a tank car gas phase connecting pipe is arranged and located between the seventh valve and the eighth valve, and a ninth valve is arranged on the tank car gas phase connecting pipe. Liquid hexafluoropropylene in the storage tank enters the metering tank through the first pipeline, the metering pump and the second pipeline, and the pressure above the liquid level of the storage tank is kept the same as that above the liquid level of the metering tank by utilizing the gas phase balance pipeline, so that the metering pump can normally pump the liquid hexafluoropropylene. When liquid hexafluoropropylene is conveyed to the storage tank by using the tank car, the bottom of the tank car trough is connected by using a liquid phase connecting pipe of the tank car, the top of the tank car trough is connected by using a gas phase connecting pipe of the tank car, the liquid hexafluoropropylene in the tank car is driven by using the metering pump, the pump feeding pipeline is transferred into the storage tank, and the pressure above the liquid level of the storage tank and the liquid level of the tank car is the same by using a gas phase balance pipe, the liquid hexafluoropropylene can be normally pumped by using the metering pump, because the liquid hexafluoropropylene contains bubbles, the working condition of the metering pump is poor probably, the fifth valve can be opened, the liquid hexafluoropropylene in the storage tank is circulated along the first pipeline, the metering pump and the liquid phase reflux pipeline form circulation, and the normal work of the metering pump is ensured.
2. The second pipeline is connected with a vacuumizing and nitrogen-charging mechanism and is positioned at the upstream of the third valve, the third pipeline is connected with a vacuumizing and nitrogen-charging mechanism and is positioned at the downstream of the fourth valve, and the second pipeline and the third pipeline are vacuumized and replaced with nitrogen through the vacuumizing and nitrogen-charging mechanism, so that the oxygen content is reduced to be below the standard, and the requirement of safe production is met.
The following further description is made with reference to the accompanying drawings and detailed description.
Drawings
Fig. 1 is a schematic connection diagram of the present invention.
In the attached drawing, 1 is a storage tank, 2 is a metering pump, 3 is a metering tank, 4 is a tank car liquid phase connecting pipe, 5 is a liquid phase return pipeline, 6 is a pump feeding pipeline, 7 is a gas phase balance pipeline, 8 is a tank car gas phase connecting pipe, 9 is a vacuumizing and nitrogen filling mechanism, 10 is a three-way valve, 11 is a liquid level meter, 101 is a first pipeline, 102 is a second pipeline, 103 is a third pipeline, a is a first valve, b is a second valve, c is a third valve, d is a fourth valve, e is a fifth valve, f is a sixth valve, g is a seventh valve, h is an eighth valve, and i is a ninth valve.
Detailed Description
The utility model discloses in, do not mark equipment, the part of concrete structure or model select the equipment or the part of chemical industry field conventionality for use usually, do not mark concrete connection mode be the conventional connected mode in chemical industry field or the connected mode of producer suggestion usually.
Referring to fig. 1, an embodiment of a hexafluoropropylene feed system is shown. The hexafluoropropylene feeding system comprises a storage tank 1, a metering pump 2 and a metering tank 3, wherein a liquid level meter 11 is arranged on the storage tank 1 for conveniently monitoring the liquid level height of the storage tank. The bottom of the storage tank 1 is connected with an inlet of a metering pump through a first pipeline 101, a first valve a is arranged on the first pipeline 101, a tank car liquid phase connecting pipe 4 is arranged on the first pipeline, the tank car liquid phase connecting pipe is located between the first valve and the metering pump, and a second valve b is arranged on the tank car liquid phase connecting pipe 4. The outlet of the metering pump 2 is connected with the metering tank 3 through a second pipeline 102, a third valve c is arranged on the second pipeline 102, generally, in order to ensure production safety, the second pipeline 102 is connected with an evacuation nitrogen charging mechanism 9 which is positioned at the upstream of the third valve c, the evacuation nitrogen charging mechanism 9 comprises a three-way valve 10, a first port of the three-way valve is connected with the second pipeline, a second port of the three-way valve is connected with a vacuum source, and a third port of the three-way valve is connected with a nitrogen source. The gas phase hexafluoropropylene is provided to the outside from the exhaust port of the metering tank 3 through a third pipeline 103, a fourth valve d is arranged on the third pipeline 103, and similarly, the third pipeline 103 is connected with a vacuumizing and nitrogen charging mechanism 9 which is positioned at the downstream of the fourth valve d. A liquid phase return line 5 is connected to the second line 102 upstream of the third valve c, the liquid phase return line 5 being provided with a fifth valve e. A pump feed line 6 is connected to the outlet of the metering pump, the downstream end of which is connected to the top of the reservoir 1, and a sixth valve f is provided on the pump feed line 6. One end of a gas phase balance pipeline 7 is connected with the third pipeline 103 and located at the downstream of the fourth valve d, the other end of the gas phase balance pipeline 7 is connected with the top of the storage tank 1, a seventh valve g and an eighth valve h are arranged on the gas phase balance pipeline 7, specifically, the seventh valve is close to the third pipeline, the eighth valve is close to the storage tank, a tank car gas phase connecting pipe 8 is arranged and located between the seventh valve g and the eighth valve h, and a ninth valve i is arranged on the tank car gas phase connecting pipe 8.
The utility model discloses a theory of operation does:
liquid hexafluoropropylene is carried as the raw materials reserve to the storage tank to the tank wagon, the bottom that utilizes tank wagon liquid phase connecting pipe and tank wagon silo links to each other, the top that utilizes tank wagon gas phase connecting pipe and tank wagon silo links to each other, start the measuring pump, make liquid hexafluoropropylene in the tank wagon through the measuring pump, pump feeding pipeline shifts to in the storage tank, and utilize the gas phase balance pipe to make storage tank liquid level top and tank wagon liquid level top the pressure the same, make the measuring pump can normally pump down liquid hexafluoropropylene, because contain the bubble in the liquid phase hexafluoropropylene, probably lead to the measuring pump operating mode bad, open the fifth valve, make liquid hexafluoropropylene in the storage tank along first pipeline, the measuring pump, liquid phase return line forms the circulation, guarantee that the measuring pump normally works.
Liquid hexafluoropropylene in the storage tank is outwards carried and is used as the raw materials, starts the measuring pump, makes liquid hexafluoropropylene in the storage tank get into the metering tank through first pipeline, second pipeline in, reserve as the raw materials, and utilizes the gas phase balance pipe to make the pressure of storage tank liquid level top and metering tank liquid level top the same, makes the measuring pump can normally pump liquid hexafluoropropylene.
Claims (5)
1. A hexafluoropropylene feed system, comprising: comprises a storage tank (1), a metering pump (2) and a metering tank (3),
the bottom of the storage tank (1) is connected with the inlet of the metering pump through a first pipeline (101), a first valve (a) is arranged on the first pipeline (101), a tank car liquid phase connecting pipe (4) is arranged on the first pipeline, a second valve (b) is arranged on the tank car liquid phase connecting pipe (4),
the outlet of the metering pump (2) is connected with the metering tank (3) through a second pipeline (102), a third valve (c) is arranged on the second pipeline (102),
the gas phase hexafluoropropylene is provided to the outside from the exhaust port of the metering tank (3) through a third pipeline (103), a fourth valve (d) is arranged on the third pipeline (103),
a liquid phase return line (5) connected to the second line (102) upstream of the third valve (c), the liquid phase return line (5) being provided with a fifth valve (e),
a pump feeding pipeline (6) is connected with the outlet of the metering pump, the downstream end of the pump feeding pipeline is connected with the top of the storage tank (1), a sixth valve (f) is arranged on the pump feeding pipeline (6),
one end of a gas phase balance pipeline (7) is connected with the third pipeline (103), and is positioned at the downstream of the fourth valve (d), the other end of the gas phase balance pipeline (7) is connected with the top of the storage tank (1), a seventh valve (g) and an eighth valve (h) are arranged on the gas phase balance pipeline (7), a tank car gas phase connecting pipe (8) is arranged and is positioned between the seventh valve (g) and the eighth valve (h), and a ninth valve (i) is arranged on the tank car gas phase connecting pipe (8).
2. The hexafluoropropylene feed system of claim 1, wherein: and the second pipeline (102) is connected with an air-evacuating and nitrogen-filling mechanism (9) which is positioned at the upstream of the third valve (c).
3. The hexafluoropropylene feed system of claim 1, wherein: and the third pipeline (103) is connected with an evacuation and nitrogen charging mechanism (9) which is positioned at the downstream of the fourth valve (d).
4. The hexafluoropropylene feed system of claim 2 or 3, wherein: the evacuation nitrogen charging mechanism (9) comprises a three-way valve (10), a first port of the three-way valve is connected with the second pipeline or the third pipeline, a second port of the three-way valve is connected with the vacuum source, and a third port of the three-way valve is connected with the nitrogen source.
5. The hexafluoropropylene feed system of claim 1, wherein: the storage tank (1) is provided with a liquid level meter (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221041024.8U CN217130982U (en) | 2022-04-29 | 2022-04-29 | Hexafluoropropylene feeding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221041024.8U CN217130982U (en) | 2022-04-29 | 2022-04-29 | Hexafluoropropylene feeding system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217130982U true CN217130982U (en) | 2022-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221041024.8U Active CN217130982U (en) | 2022-04-29 | 2022-04-29 | Hexafluoropropylene feeding system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217130982U (en) |
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2022
- 2022-04-29 CN CN202221041024.8U patent/CN217130982U/en active Active
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