Fluorine-containing olefin compression delivery system and method

Abstract

The invention belongs to the technical field of fluorine-containing olefin conveying, and particularly relates to a fluorine-containing olefin compression conveying system and method. The fluorine-containing olefin compression conveying system comprises a low-pressure buffer tank used for storing fluorine-containing olefin; the pure water circulation tank is used for storing deoxidized high-purity water; the high-pressure circulating pump is used for pumping the deoxidized high-purity water in the pure water circulating tank; the liquid inlet end of the injection pump is communicated with the high-pressure circulating pump, the air inlet end of the injection pump is communicated with the low-pressure buffer tank, and the injection end of the injection pump is communicated with the pure water circulating tank; wherein the high-pressure circulating pump is used for pressurizing and inputting deoxidized high-purity water in the pure water circulating tank into the injection pump so as to suck fluorine-containing olefin in the low-pressure buffer tank into the injection pump, and the fluorine-containing olefin and the deoxidized high-purity water are mixed and then injected into the pure water circulating tank; the fluorine-containing olefin enters the pure water circulation tank, is separated out and enters a gas phase space at the upper part of the pure water circulation tank for pressurization. According to the fluorine-containing olefin compression conveying system, under the action of the injection pump, deoxidized high-purity water is adopted as a circulating medium for pressurization, and the explosion risk can be reduced; a compressor is omitted, so that the occupied area of equipment is reduced, and the self-gathering risk is also reduced; in addition, the injection pump can enable different monomers to be mixed more uniformly.

Description

Technical Field

[0001] This invention belongs to the field of fluoroolefin transportation technology, specifically relating to a fluoroolefin compression transportation system and method. Background Technology

[0002] In processes such as PTFE polymerization, polytetrafluoroethylene-propylene polymerization, soluble PFA polymerization, perfluorosulfonic acid resin polymerization, pentafluoroiodoethane preparation, perfluoroiodoalkane telomerization, tetrafluoropropanol reaction, fluororubber polymerization, and F40 polymerization, fluorinated olefins such as tetrafluoroethylene, hexafluoropropylene, vinylidene fluoride, and trifluorochloroethylene are required. These reactors often require high pressures; therefore, the fluorinated olefins need to be pressurized to sufficient pressure to successfully enter the reactor.

[0003] There are two common pressurization methods. One is to use a compressor to pressurize and then transport the fluoroolefins. Taking the compression of two fluoroolefins used in the synthesis of fluororubber as an example, the process is described in [link to process]. Figure 1 The problems with this process include the following: 1. Poor safety: The compressor is prone to leakage, allowing air and other contaminants to enter, increasing the risk of explosion. 2. Large footprint and high equipment investment: The compressor requires sufficient maintenance space and also needs to be equipped with coolers, buffer tanks, etc., resulting in a large footprint. The compressor is also expensive. 3. Poor stability: The compressor has many traditional components, and diaphragms and other parts are easily damaged, requiring regular maintenance and high repair frequency. 4. TFE and other monomers are prone to self-polymerization: Because the compressor compresses pure fluorinated olefins, these fluorinated olefins are highly reactive and prone to polymerization reactions, which can clog pipes and increase the risk of explosion.

[0004] Another method is to utilize the saturated vapor pressure of fluorinated olefins and directly inject them into the reactor. Taking the polymerization of pure TFE monomers to produce PTFE as an example, the process is described in [link to process flow chart]. Figure 2 The problems with this process include the following: 1. Poor safety: High-purity fluoroolefins are present throughout the system, and the monomers are prone to self-polymerization, which can easily lead to oxygen leakage and explosion. 2. Large equipment footprint: Because TFE monomers are highly susceptible to self-polymerization in monomer storage tanks and gasification tanks, posing a high safety risk, these devices need to be independently arranged in explosion-proof rooms, which occupies more building area and leads to higher civil engineering costs. 3. Complex control system, prone to malfunction leading to frequent accidents: The gasification tank needs to be heated with steam or hot water, and the saturated steam level of TFE monomers increases with temperature. If the hot water regulating valve malfunctions, the pressure inside the gasification tank can rise rapidly, increasing the risk of explosion and self-polymerization. Summary of the Invention

[0005] The purpose of this invention is to provide a fluoroolefin compression and conveying system and method, which uses deoxygenated high-pressure high-purity water as the circulating medium and increases the pressure of fluoroolefins through injection and pressurization to achieve compression and conveying.

[0006] The first aspect of this application provides a fluoroolefin compression and conveying system, comprising: Low-pressure buffer tanks are used to store fluoroolefins; Pure water circulation tank, used to store deoxygenated high-purity water; A high-pressure circulating pump is used to extract deoxygenated high-purity water from a pure water circulating tank; and The jet pump has its inlet connected to a high-pressure circulating pump, its air inlet connected to a low-pressure buffer tank, and its jetting end connected to a pure water circulating tank; among these... The high-pressure circulating pump is used to pressurize the deoxygenated high-purity water in the pure water circulating tank and input it into the jet pump, so as to draw the fluorinated olefins in the low-pressure buffer tank into the jet pump. The fluorinated olefins are mixed with the deoxygenated high-purity water and then injected into the pure water circulating tank. After entering the pure water circulating tank, the fluorinated olefins are released into the gas phase space at the top of the pure water circulating tank for pressurization.

[0007] In one embodiment of this application, the upper space of the pure water circulation tank is used to store fluoroolefins, and the lower space is used to store deoxygenated high-purity water; The high-pressure circulating pump is connected to the lower part of the pure water circulating tank.

[0008] In one embodiment of this application, the fluoroolefin compression and conveying system further includes: The high-pressure buffer tank is connected to the upper gas phase space of the pure water circulation tank and is used to store pressurized fluoroolefins. The regulating valve is installed on the pipeline between the pure water circulation tank and the high-pressure buffer tank; The dryer, connected to a high-pressure buffer tank, is used to dry fluoroolefins.

[0009] In one embodiment of this application, after the high-pressure circulating pump draws deoxygenated high-purity water from the pure water circulating tank, it is cooled by a cooler and then enters the jet pump. The cooler cools the deoxygenated high-purity water to 5-10°C.

[0010] In one embodiment of this application, the jet pump includes: The air intake chamber has a liquid collection nozzle at its lower end and an air inlet on its side wall that communicates with the low-pressure buffer tank. The jet pipe has an inlet at its upper end connected to a high-pressure circulating pump; its lower end extends into the suction chamber and is equipped with a liquid inlet nozzle facing the liquid collecting nozzle; and The water outlet pipe includes a straight section and an enlarged section; the upper end of the straight section is connected to the liquid collecting nozzle, and the lower end of the enlarged section is connected to the pure water circulation tank.

[0011] In one embodiment of this application, the spray pipe is provided with a liquid inlet guide plate to spray deoxygenated high-purity water downward in a swirling manner.

[0012] In one embodiment of this application, the fluorinated olefin includes one or more of tetrafluoroethylene, hexafluoropropylene, vinylidene fluoride, and trifluorochloroethylene.

[0013] A second aspect of this application provides a method for compressing and conveying fluoroolefins using the fluoroolefin compression and conveying system described above, comprising: The pressure inside the low-pressure buffer tank is controlled to be -0.05 to 0.1 MPa; The deoxygenated high-purity water drawn by the high-pressure circulating pump is cooled to 5-10℃ and then discharged into the jet pump. The pressure of the high-pressure circulating pump is controlled to maintain the pressure of the fluoroolefins in the upper gas phase space of the pure water circulating tank at 3.0–3.5 MPa. The control valve regulates the pressure inside the high-pressure buffer tank to 2.5–3.0 MPa.

[0014] In one embodiment of this application, the fluorinated olefin is a fluorinated olefin monomer or a mixture of two fluorinated olefin monomers.

[0015] In one embodiment of this application, the fluoroolefin in the high-pressure buffer tank is dried before being fed into the reaction vessel.

[0016] The beneficial effects of this invention are: Unlike existing technologies, this application provides a fluoroolefin compression and delivery system, comprising: a low-pressure buffer tank for storing fluoroolefins; a pure water circulation tank for storing deoxygenated high-purity water; a high-pressure circulation pump for drawing deoxygenated high-purity water from the pure water circulation tank; and a jet pump, whose inlet end is connected to the high-pressure circulation pump, its air inlet end is connected to the low-pressure buffer tank, and its jet end is connected to the pure water circulation tank. The high-pressure circulation pump pressurizes the deoxygenated high-purity water from the pure water circulation tank and inputs it into the jet pump, thereby drawing the fluoroolefins from the low-pressure buffer tank into the jet pump. The fluoroolefins are mixed with the deoxygenated high-purity water and then injected into the pure water circulation tank. After entering the pure water circulation tank, the fluoroolefins precipitate and enter the gas phase space above the pure water circulation tank for pressurization. The fluoroolefin compression and delivery system of this invention can use deoxygenated high-purity water as the circulation medium for pressurization under the action of the jet pump, which can reduce the risk of explosion; it eliminates the compressor, reducing the equipment footprint and also reducing the risk of self-polymerization; furthermore, the jet pump can make the mixing of different monomers more uniform.

[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the compression process of fluororubber using fluoroolefins in the prior art; Figure 2 This is a schematic diagram of the heating, vaporization, and conveying of tetrafluoroethylene, vinylidene fluoride, etc., using existing technologies. Figure 3 This is a schematic diagram of a preferred embodiment of a fluoroolefin compression and conveying system of the present invention; Figure 4 This is a schematic diagram of a jet pump according to a preferred embodiment of the present invention.

[0021] In the picture: 1. Low-pressure buffer tank; 2. Pure water circulation tank; 3. High-pressure circulation pump; 4. Jet pump; 5. Suction chamber; 6. Liquid collection nozzle; 7. Air inlet; 8. Jet pipe; 9. Water inlet; 10. Liquid inlet nozzle; 11. Liquid inlet guide plate; 12. Water outlet pipe; 13. Straight pipe section; 14. Enlarged section; 15. High-pressure buffer tank; 16. Dryer; 17. Cooler. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] This application provides a fluoroolefin compression and conveying system and method, which are described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, in the following embodiments, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0024] See Figure 3 and Figure 4 In one embodiment, the fluoroolefin compression and delivery system includes: Low-pressure buffer tank 1, used for storing fluoroolefins; Pure water circulation tank 2 is used to store deoxygenated high-purity water; High-pressure circulating pump 3 is used to extract deoxygenated high-purity water from the pure water circulating tank 2; and The jet pump 4 has its inlet end connected to the high-pressure circulating pump 3, its air inlet end connected to the low-pressure buffer tank 1, and its jet end connected to the pure water circulating tank 2; wherein... The high-pressure circulating pump 3 is used to pressurize the deoxygenated high-purity water in the pure water circulating tank 2 and input it into the jet pump 4, so as to draw the fluorinated olefins in the low-pressure buffer tank 1 into the jet pump 4. The fluorinated olefins are mixed with the deoxygenated high-purity water and then injected into the pure water circulating tank 2. After entering the pure water circulating tank 2, the fluorinated olefins are released and enter the gas phase space above the pure water circulating tank 2 for pressurization.

[0025] It is understood that a jet pump is a pump with no moving parts designed based on fluid dynamics principles, achieving fluid transport or mixing through the transfer of kinetic energy generated by high-speed fluid. In some embodiments, the jet pump may be a commercially available one.

[0026] Optionally, in this embodiment, see Figure 4 The jet pump 4 includes: an air intake chamber 41 with a liquid collection nozzle 411 at its lower end and an air inlet 412 on its side wall that communicates with the low-pressure buffer tank 1; a jet pipe 42 with a water inlet 421 at its upper end that communicates with the high-pressure circulating pump 3; a liquid inlet nozzle 422 extending into the air intake chamber 41 and facing the liquid collection nozzle 411; and a water outlet pipe 43, which includes a straight pipe section 431 and an enlarged section 432; the upper end of the straight pipe section 431 is connected to the liquid collection nozzle 411, and the lower end of the enlarged section 432 is connected to the pure water circulating tank 2.

[0027] In this embodiment, when deoxygenated high-purity water with a certain pressure is ejected at a certain speed through the inlet nozzle 422 of the spray pipe 42, according to Bernoulli's principle, it carries away the air in the suction chamber 41, creating a vacuum in the chamber, and the fluorinated olefins in the low-pressure buffer tank 1 are drawn in. The two fluids mix and exchange energy in the suction chamber 41, the velocity of the deoxygenated high-purity water decreases, and the velocity of the drawn fluorinated olefins increases. At the collecting nozzle 411, the two tend to be equal, and the pressure gradually increases. After the mixed fluid passes through the straight section 431 and the enlarged section 432 of the expansion pipe 43, most of the kinetic energy is converted into pressure energy, which further increases the pressure, and it is discharged into the pure water circulation tank 2. Since the fluorinated olefins have extremely low solubility in water, they will precipitate in the pure water circulation tank 2 and be stored in the upper gas phase space of the pure water circulation tank 2. The higher the output pressure of the high-pressure circulation pump 3, the higher the pressure generated in the pure water circulation tank 2, thereby meeting the requirements of subsequent reactions.

[0028] See Figure 4 Optionally, the injection pipe 42 is provided with an inlet guide plate 423 to spray the deoxygenated high-purity water downward in a swirling manner, so as to form higher pressure and greater air intake.

[0029] In one embodiment of this application, the upper space of the pure water circulation tank 2 is used to store fluoroolefins, and the lower space is used to store deoxygenated high-purity water; the high-pressure circulation pump 3 is connected to the lower part of the pure water circulation tank 2.

[0030] Furthermore, in one embodiment, the fluoroolefin compression and conveying system may further include: a high-pressure buffer tank 5, which is connected to the upper gas phase space of the pure water circulation tank 2, for storing the pressurized fluoroolefin.

[0031] Furthermore, in one embodiment, the fluoroolefin compression and conveying system may further include: a regulating valve 51, disposed on the pipeline between the pure water circulation tank 2 and the high-pressure buffer tank 5. The opening degree of the regulating valve 51 can be used to control the pressure inside the high-pressure buffer tank 5.

[0032] Furthermore, in one embodiment, the fluoroolefin compression and conveying system further includes: a dryer 6, connected to a high-pressure buffer tank 5, for drying the fluoroolefin.

[0033] In one embodiment, the fluorinated olefins in the high-pressure buffer tank 5 can be dried by the dryer 6 to remove residual moisture before entering the reactor for polymerization.

[0034] Furthermore, in one embodiment, after the high-pressure circulating pump 3 draws deoxygenated high-purity water from the pure water circulating tank 2, it is cooled by the cooler 7 before entering the spray pipe 42. The cooler 7 can be used to adjust the temperature of the deoxygenated high-purity water to 5-10°C.

[0035] Optionally, the fluorinated olefin includes one or more of tetrafluoroethylene, hexafluoropropylene, vinylidene fluoride, and trifluorochloroethylene, which can be selected according to the needs of the polymerization reaction.

[0036] Based on the above embodiments, one embodiment of this application also provides a method for compressing and transporting fluoroolefins, comprising: controlling the pressure in the low-pressure buffer tank 1 to be -0.05 to 0.1 MPa; cooling the deoxygenated high-purity water drawn by the high-pressure circulating pump 3 to 5 to 10°C and then discharging it into the jet pump 4; controlling the pressure of the high-pressure circulating pump 3 to control the pressure of the fluoroolefins in the upper gas phase space of the pure water circulating tank 2 to be 3.0 to 3.5 MPa; and controlling the regulating valve 51 to adjust the pressure in the high-pressure buffer tank 5 to be 2.5 to 3.0 MPa.

[0037] Furthermore, the fluorinated olefin is one fluorinated olefin monomer or a mixture of two fluorinated olefin monomers.

[0038] Furthermore, the fluorinated olefins in the high-pressure buffer tank 5 are dried before being fed into the reaction vessel.

[0039] It should be noted that the pressure in this embodiment refers to gauge pressure. Gauge pressure is a pressure measurement method based on atmospheric pressure, and gauge pressure = absolute pressure - atmospheric pressure. When the absolute pressure inside the low-pressure buffer tank is lower than the local atmospheric pressure, the gauge pressure will show a negative value.

[0040] Application Example: Synthesis of Perfluoroethylene Propylene In one application scenario, according to the production conditions of polytetrafluoroethylene (PTFE), water, surfactants, emulsifying stabilizers, initiators, etc., need to be added to the reactor. After the reactor is heated to a set temperature through the jacket, a mixture of tetrafluoroethylene and perfluoropropylene monomers is introduced to carry out the polymerization reaction. The fluorinated olefin compression conveying system of this invention is used to convey the mixed monomers of tetrafluoroethylene and perfluoropropylene. Specifically: Before the tetrafluoroethylene and hexafluoropropylene mixed monomers are prepared, the high-pressure circulating pump 3 is turned on. Pure water, after being cooled by the cooler 7, enters the jet pump 4 at high pressure and high flow rate. Under the action of the jet pump 4, a negative pressure and a large intake volume are formed at the air inlet, thereby drawing in the low-pressure mixed olefins and mixing them thoroughly with the water. High pressure is formed at the water outlet, spraying the water and fluorinated olefins into the high-pressure circulating pump 3.

[0041] Due to their extremely low solubility in water, fluorinated olefins rapidly precipitate from the water upon entering the pure water circulation tank 2 and enter the gas phase space of the pure water circulation tank 2. After automatic pressure regulation via a regulating valve, the fluorinated olefins enter the high-pressure buffer tank 5 for pressure stabilization, and then pass through the dryer 6 to remove residual moisture before entering the polytetrafluoroethylene propylene reactor for polymerization.

[0042] In this process, the higher the output pressure of the high-pressure circulating pump 3, the higher the pressure that can be formed in the gas phase space of the pure water circulating tank 2, thus meeting the pressure requirements of the polymerization reaction. See Table 1 for experimentally measured data on the outlet pressure of the high-pressure circulating pump and the exhaust pressure of the pure water circulating tank. By rationally designing the jet pump, the exhaust pressure of the mixed monomers can be made close to the pressure of the high-pressure circulating pump. For example, when the pressure of the high-pressure circulating pump reaches 3.0 MPa, the pressure of the mixed olefins can be increased to 2.8 MPa.

[0043] Table 1 In summary, compared with traditional compression processes, the fluoroolefin compression and conveying system of the present invention has the following advantages: 1. More uniform monomer mixing: Fluoroolefins such as hexafluoropropylene and tetrafluoroethylene are fully mixed under the action of the jet pump, which can ensure that the various monomers entering the reactor are mixed more uniformly, thereby ensuring the quality of polymer products.

[0044] 2. Lower Explosion Risk: Using deoxygenated high-purity water as the circulating medium ensures that even if flammable and explosive tetrafluoroethylene undergoes a polymerization reaction, the exothermic reaction can be quickly transferred to the circulating water, and then the heat can be removed through a circulating cooler, reducing the risk of explosion. Simultaneously, the fluorinated olefins are in full contact with the high-purity water during pressurization, reducing the chance of collisions between the fluoroolefins themselves and significantly lowering the risk of self-polymerization.

[0045] 3. Fewer vulnerable parts and lower maintenance frequency: Compression of fluoroolefins typically uses diaphragm compressors or reciprocating compressors. Diaphragm compressors have a small discharge capacity, suitable only for small-scale or pilot-scale applications, and the diaphragm is easily damaged under high-frequency reciprocating motion. Reciprocating compressors have a more complex structure and require complex lubrication systems, resulting in more vulnerable parts. In the system of this invention, only the high-pressure circulating pump is a transmission component. Compared to the compressor, the pump is safer, easier to maintain, and far more stable.

[0046] 4. Compact equipment, small footprint, and easier layout: Traditional compression processes are relatively large, and single-stage compression is generally insufficient to meet high-pressure requirements, often requiring two or three stages. The temperature of the compressed gas increases, necessitating complex gas buffering, pressure stabilization, and condensation systems, thus requiring a large footprint and ample maintenance space. Furthermore, the compressor generates significant noise during operation, typically necessitating its placement in a ground-floor compressor room. The process of this invention is simple, can be designed as a skid-mounted structure, occupies a smaller area, and can be freely placed in any location.

[0047] 5. Lower risk of monomer self-polymerization: Traditional compression processes require the compressor to be located on the ground floor, while polymerization reactors, due to explosion-proof and venting requirements, need to be located on the top floor. Therefore, the pipeline distance for transporting monomers is longer, increasing the risk of self-polymerization. This invention, however, allows the system to be centrally located near the equipment within the reaction chamber, resulting in shorter pipeline distances and a lower risk of self-polymerization.

[0048] It should be noted that all the devices (parts whose specific structures are not specified) selected in this application are general standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0049] In the description of the embodiments of the present invention, unless otherwise expressly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections.

[0050] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A fluoroolefin compression and conveying system, characterized in that, include: Low-pressure buffer tank (1) is used to store fluoroolefins; Pure water circulation tank (2) is used to store deoxygenated high-purity water; High-pressure circulating pump (3) is used to extract deoxygenated high-purity water from the pure water circulating tank (2); as well as The jet pump (4) has its inlet end connected to the high-pressure circulating pump (3), its air inlet end connected to the low-pressure buffer tank (1), and its jet end connected to the pure water circulating tank (2); wherein The high-pressure circulating pump (3) pressurizes the deoxygenated high-purity water in the pure water circulating tank (2) and inputs it into the jet pump (4) to draw the fluorinated olefins in the low-pressure buffer tank (1) into the jet pump (4). The fluorinated olefins are mixed with the deoxygenated high-purity water and then injected into the pure water circulating tank (2). After entering the pure water circulating tank (2), the fluorinated olefins are released into the gas phase space above the pure water circulating tank (2) and pressurized to 3.0-3.5 MPa.

2. The fluoroolefin compression and conveying system according to claim 1, characterized in that, The upper space of the pure water circulation tank (2) is used to store fluoroolefins, and the lower space is used to store deoxygenated high-purity water. The high-pressure circulating pump (3) is connected to the lower part of the pure water circulating tank (2).

3. The fluoroolefin compression and conveying system according to claim 1, characterized in that, Also includes: The high-pressure buffer tank (5) is connected to the upper gas phase space of the pure water circulation tank (2) and is used to store pressurized fluoroolefins; A regulating valve (51) is installed on the pipeline between the pure water circulation tank (2) and the high-pressure buffer tank (5); The dryer (6) is connected to the high-pressure buffer tank (5) and is used to dry fluoroolefins.

4. The fluoroolefin compression and conveying system according to claim 1, characterized in that, The high-pressure circulating pump (3) draws deoxygenated high-purity water from the pure water circulating tank (2), and after being cooled by the cooler (7), it enters the jet pump (4). The cooler (7) cools the deoxygenated high-purity water to 5-10°C.

5. The fluoroolefin compression and conveying system according to claim 1, characterized in that, The jet pump (4) includes: The suction chamber (41) has a liquid collection nozzle (411) at its lower end and an air inlet (412) on its side wall that communicates with the low-pressure buffer tank (1). The jet pipe (42) has an inlet (421) at its upper end that is connected to the high-pressure circulating pump (3); its lower end extends into the suction chamber (41) and is provided with an inlet nozzle (422) facing the liquid collection nozzle (411); and The water outlet pipe (43) includes a straight pipe section (431) and an enlarged section (432); the upper end of the straight pipe section (431) is connected to the liquid collecting nozzle (411), and the lower end of the enlarged section (432) is connected to the pure water circulation tank (2).

6. The fluoroolefin compression and conveying system according to claim 5, characterized in that, The spray pipe (42) is provided with a liquid inlet guide plate (423) for spraying deoxygenated high-purity water downward in a swirling manner.

7. The fluoroolefin compression and conveying system according to claim 1, characterized in that, The fluorinated olefins include one or more of tetrafluoroethylene, hexafluoropropylene, vinylidene fluoride, and trifluorochloroethylene.

8. A method for compressing and conveying fluoroolefins using the fluoroolefin compression and conveying system as described in any one of claims 1-7, characterized in that, include: The pressure inside the low-pressure buffer tank (1) is controlled to be -0.05 to 0.1 MPa; The deoxygenated high-purity water drawn by the high-pressure circulating pump (3) is cooled to 5-10℃ and then discharged into the jet pump (4). The pressure of the high-pressure circulating pump (3) is controlled to control the pressure of the fluoroolefin in the upper gas phase space of the pure water circulating tank (2) to be between 3.0 and 3.5 MPa; The control valve (51) adjusts the pressure in the high-pressure buffer tank (5) to 2.5-3.0 MPa.

9. The method for compressing and conveying fluoroolefins according to claim 8, characterized in that, The fluorinated olefin is one fluorinated olefin monomer or a mixture of two fluorinated olefin monomers.

10. The method for compressing and conveying fluoroolefins according to claim 8, characterized in that, The fluorinated olefins in the high-pressure buffer tank (5) are dried and then fed into the reaction vessel.

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