VCM (Vinyl Chloride Monomer) recycling system for producing paste resin

Abstract

The utility model relates to the field of paste resin production, in particular to a VCM (Vinyl Chloride Monomer) recycling system for producing paste resin, which comprises a VCM gas-liquid separation tank and a VCM gas-liquid separation tower which are connected in series into a whole through a VCM circulating pipeline and a discharging pipeline, the VCM separated from the glue solution is discharged into a VCM exhaust pipeline through a gas discharge hole; the VCM circulating pipeline is connected between the circulating latex discharge hole of the VCM gas-liquid separation tank and the feed end of the VCM gas-liquid separation tower; the latex containing the residual VCM gas phase enters a VCM gas-liquid separation tower through a circulating latex discharge port and a VCM circulating pipeline for further VCM recovery; the discharging pipeline is connected between the discharging end of the VCM gas-liquid separation tower and the circulating latex feeding hole of the VCM gas-liquid separation tank, and a latex solution at the bottom of the VCM gas-liquid separation tower enters the VCM gas-liquid separation tank again through the discharging pipeline, so that VCM in latex can be removed to the maximum extent, and meanwhile, the problems that the inner wall of the stripping tower is caked and a steam jet is easy to block are solved.

Description

Technical Field

[0001] The utility model relates to the field of paste resin production, in particular to the field of removal of VCM monomers in latex during paste resin production, and specifically to a VCM recycling system for producing paste resin. Background Art

[0002] As the name suggests, polyvinyl chloride (PVC) paste resin is primarily used in a paste form. This paste is often referred to as plastisol, a unique liquid form of unprocessed PVC plastic. Paste resins are often produced by emulsion and microsuspension methods. Currently, the application areas and market size of paste resins are continuously expanding. VCM, or vinyl chloride, is an important monomer used in polymer chemical industry. It can be produced from ethylene or acetylene. It is a colorless, easily liquefied gas with a boiling point of -13.4°C, a critical temperature of 142°C, and a critical pressure of 5.22 MPa. VCM is toxic and can form explosive mixtures with air.

[0003] During the paste resin production process, the VCM recovery unit is a crucial link in the entire production process. The effectiveness of removing the VCM monomer (gas phase) from the latex has a significant impact on the subsequent product drying process and the quality of the paste resin product. In addition, VCM that is not removed from the latex will enter the exhaust gas treatment unit after the drying process. If the VCM is not completely removed, it will place great pressure on the exhaust gas treatment unit, and it is likely that the exhaust gas treatment will not meet emission standards, thereby affecting the normal production activities of the enterprise and placing great pressure on environmental protection. Furthermore, due to the high toxicity of VCM monomer, if it is not completely treated and discharged into the atmosphere, it will also pose a significant safety hazard.

[0004] Therefore, in the paste resin production process, the purification and removal of VCM in latex is of great significance.

[0005] In the existing paste resin production process, there are two main methods for purifying and removing VCM in latex:

[0006] Process:

[0007] This is a continuous process. In the VCM recovery unit, latex is pumped into a horizontal device (VCM blow-off tank) that is tilted at a certain angle and has a stirring mechanism at the bottom. This agitation causes the VCM in the latex to escape and collect at the top of the blow-off tank. The tank then passes through a defoamer and enters the subsequent processing steps. The main problems with this process are: unsatisfactory VCM recovery (removal) and long recovery times, especially when the latex is highly viscous.

[0008] Stripping tower process:

[0009] This is a continuous process. The stripping tower process involves pumping latex into a stripping tower. Simultaneously, the latex is sprayed downwards while steam is injected from the bottom of the tower to heat the latex. Under vacuum conditions, VCM monomer is separated from the latex. The latex is then discharged from the bottom of the stripping tower and sent to the next unit, while the VCM monomer is discharged from the top of the tower and sent to the subsequent processing stages. The main problems with this process are that the latex easily spills onto the inner walls of the tower, where it adheres to the walls and forms plasticized flakes, causing material agglomeration. Furthermore, the lower steam nozzles are prone to clogging. Furthermore, this process has a significant drawback for colloidal media: it cannot effectively recover (remove) VCM, resulting in suboptimal recovery.

[0010] Furthermore, the existing pipe distributor or nozzle method of spraying the material downward is not suitable for resins with high viscosity (viscosity of 10-20 cp) and potentially particulate materials. It is prone to clogging at the nozzle and pipe openings, and the spray area, spray surface shape, and spray intensity do not meet the production process requirements. This makes it easy for the latex to be sprayed onto the inner wall of the stripping tower, affecting the removal of VCM monomer and the recovery of the latex. Furthermore, the existing process scheme cannot adjust and control multiple parameters of the material spray, which significantly affects the material conversion rate and product quality. Utility Model Content

[0011] The purpose of the utility model is to provide a VCM recycling system for producing paste resin, which can remove VCM in latex to the greatest extent and solve the problems of agglomeration on the inner wall of the stripping tower, difficulty in adjusting spraying parameters and easy clogging of steam nozzles.

[0012] One of the purposes of the utility model is to provide a VCM recycling system for producing paste resin, comprising a VCM gas-liquid separation tank and a VCM gas-liquid separation tower, which are connected in series through a VCM circulation pipeline and a discharge pipeline;

[0013] The VCM gas-liquid separation tank is a horizontal closed cylindrical tank body and is tilted at a certain angle. The lower side of the VCM gas-liquid separation tank is provided with a raw latex feed port, a circulating latex feed port, and a finished latex discharge port. The upper side of the VCM gas-liquid separation tank is provided with a gas discharge port and a circulating latex discharge port. The VCM gas separated from the latex is discharged into the VCM exhaust pipeline through the gas discharge port.

[0014] The VCM circulation pipeline is connected between the circulating latex discharge port of the VCM gas-liquid separation tank and the feed end of the VCM gas-liquid separation tower; the latex containing the remaining VCM gas phase enters the VCM gas-liquid separation tower through the circulating latex discharge port and the VCM circulation pipeline for further VCM recovery; the discharge pipeline is connected between the discharge end of the VCM gas-liquid separation tower and the circulating latex feed port of the VCM gas-liquid separation tank, and the latex at the bottom of the VCM gas-liquid separation tower enters the VCM gas-liquid separation tank again through the discharge pipeline.

[0015] As a preferred technical solution, a stirring device is provided in the VCM gas-liquid separation tank. The stirring device is vertically arranged, and the electrical control part of the stirring device is arranged at the top outside the tank body. A stirring rod is connected below the electrical control part, and the stirring rod extends downward to the bottom of the VCM gas-liquid separation tank; at least two layers of stirring blades are provided on the stirring rod along the axial direction.

[0016] As a preferred technical solution, the foam layer of the VCM gas-liquid separation tank is provided with at least one layer of stirring blades, and the edges of the stirring blades in the foam layer are provided with a needle-like structure.

[0017] As a preferred technical solution, a foam baffle is provided in the VCM gas-liquid separation tank, and the foam baffle extends downward from the top of the VCM gas-liquid separation tank to the center of the tank cross section.

[0018] As a preferred technical solution, the foam baffle is densely covered with foam removal holes, and the inner wall of the foam removal hole is surrounded by a plurality of spikes, which extend from the inner wall of the foam removal hole to the center.

[0019] As an optimal technical solution, the VCM circulation pipeline is provided with a latex circulation pump, a Venturi ejector and a hot steam conveying pipeline. The latex circulation pump is used to deliver the latex to the VCM gas-liquid separation tower; the hot steam conveying pipeline is used to deliver the hot steam to the Venturi mixer, and the latex enters the VCM gas-liquid separation tower after being heated by hot steam in the Venturi mixer; a temperature regulating valve and a pressure regulating valve are installed on the hot steam conveying pipeline to respectively adjust the temperature and pressure of the hot steam.

[0020] As an optimal technical solution, a fluid shaping valve connected to a Venturi injector is provided at the top of the VCM gas-liquid separation tower; the fluid shaping valve includes an electric actuator and a main valve body; the main valve body includes a valve core and an outer shell, and the outer shell is sleeved on the outside of the valve core; the outer shell is connected to the top of the VCM gas-liquid separation tower through a flange; the output end of the electric actuator is connected to the top of the valve core and controls the height of the valve core, and a shaping plate is provided at the bottom of the valve core; the space between the outer shell and the valve core provides a tangible channel for the flow of latex, and the latex is ejected through the annular gap between the bottom of the outer shell and the shaping plate; a material inlet is provided on one side above the outer shell, and the material inlet is connected to the discharge end of the Venturi injector.

[0021] As a preferred technical solution, the outer shell and the shaping plate may be circular or square in shape; and / or, a plurality of spray holes are provided on the shaping plate facing the glue channel.

[0022] As a preferred technical solution, a remote pressure gauge, flow meter and regulating valve are provided on the pipeline between the material inlet and the Venturi ejector.

[0023] As a preferred technical solution, a cooling pipe is arranged on the outer wall of the VCM gas-liquid separation tower from top to bottom.

[0024] The beneficial effects of the utility model are:

[0025] The utility model connects the VCM gas-liquid separation tank and the VCM gas-liquid separation tower in series into a whole through a VCM circulation pipeline, and realizes the gradual separation of VCM gas through the reciprocating operation of the above two devices; specifically:

[0026] 1. First, the VCM monomer is initially separated in a VCM gas-liquid separation tank. A stirring device and a foam baffle are installed in the VCM gas-liquid separation tank to enhance the removal efficiency of the VCM monomer in the latex. The latex containing the remaining VCM monomer is then heated outside the tower, solving the problem of easy blockage of the hot steam pipe in the traditional process.

[0027] 2. There are at least two layers of stirring blades on the stirring rod along the axial direction. The stirring blades in the latex liquid phase play a stirring role, making the VCM escape better. The stirring blades in the foam layer play a defoaming role. The setting of the foam baffle further enhances the defoaming effect.

[0028] 3. The heated latex enters the VCM gas-liquid separation tower for spraying, and the VCM monomer in the latex is removed under a vacuum environment. For fluids with a viscosity of 10 to 20 cp, a fluid plastic valve is provided with fine adjustment of flux, spray intensity, spray area, and collision shape, solving the problem of fixed and unadjustable material spray parameters in traditional materials, thereby improving material conversion rate and product quality.

[0029] 4. The space between the outer shell and the valve core of the fluid plastic valve provides a tangible channel with a large flux for the flow of latex. The latex is sprayed out through the gap between the bottom of the outer shell and the plastic plate which can be adjusted at any time, solving the problem of easy clogging of the spray channel by materials in this field.

[0030] 5. The outer wall of the VCM gas-liquid separation tower is surrounded by cooling pipes, which reduces the possibility of latex plasticization on the inner wall of the tower and is conducive to the recovery of latex. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of a VCM recycling system for producing paste resin according to the present invention;

[0032] Figure 2 Schematic diagram of the fluid shaping valve of the present invention.

[0033] In the figure: 1, VCM gas-liquid separation tank; 11, feed pipeline; 12, stirring device; 13, foam baffle; 14, gas outlet; 15, circulating latex outlet; 16, VCM exhaust pipeline;

[0034] 2. VCM circulation pipeline; 21. Latex circulation pump; 22. Venturi ejector; 23. Hot steam transmission pipeline; 3. VCM gas-liquid separation tower; 31. Cooling pipeline; 4. Fluid shaping valve; 41. Electric actuator; 42. Valve core; 43. Outer shell; 44. Shaping plate; 45. Material inlet; 5. Discharge pipeline. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0036] like Figure 1 、 2 As shown, the utility model provides a VCM recycling system for producing paste resin, comprising a VCM gas-liquid separation tank 1 and a VCM gas-liquid separation tower 3, which are connected in series through a VCM circulation pipeline 2 and a discharge pipeline 5;

[0037] The VCM gas-liquid separation tank 1 is an improvement of the blow-off tank in the prior art. The specific structure is a horizontal closed cylindrical tank body and is tilted at a certain angle. The lower side of the VCM gas-liquid separation tank 1 is provided with a raw latex feed port, a circulating latex feed port, and a finished latex discharge port; the upper side is provided with a gas discharge port 14 and a circulating latex discharge port 15.

[0038] The VCM circulation pipeline 2 is connected between the circulating latex discharge port 15 of the VCM gas-liquid separation tank 1 and the feed end of the VCM gas-liquid separation tower 3; the discharge pipeline 5 is connected between the discharge end of the VCM gas-liquid separation tower 3 and the circulating latex feed port of the VCM gas-liquid separation tank 1;

[0039] The feed line 11 conveys the raw latex containing VCM monomer to the VCM gas-liquid separation tank 1 for stirring, and the stirring process achieves the purpose of preliminary separation of VCM from the latex; the VCM gas is discharged into the VCM exhaust pipeline 16 through the gas outlet 14; the latex containing the remaining VCM gas phase enters the VCM gas-liquid separation tower 3 through the circulating latex outlet 15 and the VCM circulating pipeline 2 for further recovery; then enters the VCM gas-liquid separation tank 1 again through the discharge pipeline 5 for recovery of the VCM monomer. This cycle is repeated until the VCM monomer content of the latex in the VCM gas-liquid separation tank 1 reaches below 200 ppm, at which time it is discharged through the finished latex outlet to the next process.

[0040] A stirring device 12 is installed in the VCM gas-liquid separation tank 1 near the raw latex feed port. The stirring device 12 is vertically arranged, and the electrical control portion of the stirring device is located at the top of the outer side of the tank body. A stirring rod is connected below the electrical control portion, and the stirring rod extends downward to the bottom of the VCM gas-liquid separation tank. Because a large amount of foam is generated on the surface of the latex liquid phase during stirring, defoaming is required to facilitate the discharge of VCM gas and reduce the entrainment of latex foam into the gas phase and entry into the back system, causing dryer blockage. Therefore, at least two layers of stirring blades are axially arranged on the stirring rod. The stirring blades in the latex liquid phase stir the VCM to facilitate the escape of VCM. The foam layer is equipped with at least one layer of stirring blades, and the edges of the stirring blades in the foam layer are provided with a needle-like structure to achieve a defoaming effect.

[0041] In order to further enhance the defoaming effect, a semicircular foam baffle 13 is provided in the VCM gas-liquid separation tank 1. The foam baffle 13 extends downward from the top of the VCM gas-liquid separation tank 1 to the center of the tank cross section to fully intercept the foam. The plate body is densely covered with defoaming holes, and a plurality of sharp thorns are distributed around the inner wall of the defoaming hole. The sharp thorns extend from the inner wall of the defoaming hole to the center so that the foam is punctured when passing through the hole. In order to achieve a better defoaming effect, multiple layers of foam baffles 13 can be evenly provided in the VCM gas-liquid separation tank 1.

[0042] Preferably, the gas discharge port 14 is arranged at the top of the VCM gas-liquid separation tank 1, and the circulating latex discharge port 15 is arranged at the bottom of the VCM gas-liquid separation tank 1; the inclination angle of the VCM gas-liquid separation tank 1 is 3-5°, and the setting of this angle facilitates the upward transportation of VCM gas without hindering the circulation of latex.

[0043] The VCM circulation pipeline 2 is provided with a latex circulation pump 21, a Venturi ejector 22 and a hot steam delivery pipeline 23. The latex circulation pump 21 is used to deliver the latex to the VCM gas-liquid separation tower 3; the hot steam delivery pipeline 23 is used to deliver hot steam to the Venturi mixer, where the hot steam is mixed with the latex and the heated steam is delivered into the tower; a temperature regulating valve and a pressure regulating valve are installed on the hot steam delivery pipeline 23 to adjust the temperature and pressure of the hot steam respectively; during production, heating is required to remove VCM from the latex; compared with the prior art in which hot steam is input upward from the bottom of the stripping tower, the present application heats the latex before it enters the VCM gas-liquid separation tower 3, thereby solving the problem that the sprayed latex easily clogs the steam nozzle.

[0044] The VCM gas-liquid separation tower 3 is an improvement on the existing stripping tower. In the prior art, sprayed latex falls onto the inner wall of the stripping tower, easily forming plasticized flakes. To address this problem, cooling pipes 31 are arranged along the outer wall of the VCM gas-liquid separation tower 3 from top to bottom. Circulating cooling water cools the tower wall to prevent the latex from plasticizing into flakes.

[0045] Preferably, the latex is sprayed into the VCM gas-liquid separation tower 3 through a fluid shaping valve 4; the fluid shaping valve 4 includes an electric actuator 41 and a main valve body; the main valve body includes a valve core 42 and an outer shell 43, the top of the valve core 42 is connected to the output end of the electric actuator 41, and the bottom is provided with a shaping plate 44 as a core component for controlling the spraying parameters; the cross-section of the shaping plate 44 is adapted to the shape and size of the inner cavity of the outer shell, the bottom of the bottom shaping plate 44 is flush, and the top can be set to a flat top or an arc top; the outer shell 43 is sleeved on the outside of the valve core 42, and the outer shell 43 is connected to the top of the VCM gas-liquid separation tower 3 The outer shell 43 is connected to the outer shell 43 by a flange; a material inlet 45 is provided on one side above the outer shell 43, and the material inlet 45 is connected to the discharge end of the venturi ejector 22 through a corresponding pipeline; because the space between the outer shell 43 and the valve core 42 provides a large-throughput latex channel for the flow of latex, the latex is ejected through the adjustable gap between the bottom of the outer shell 43 and the shaping plate 44. The design of this large-throughput latex channel not only provides sufficient circulation space for the latex, but also allows the latex to be subjected to uniform pressure and velocity distribution during the flow process, solving the problem of materials in this field easily clogging the spray channel. The material inlet 45 is connected to the main valve body at an angle downward to reduce the feed resistance, ensuring that the latex can smoothly enter the fluid shaping valve 4.

[0046] In actual production, the length of the valve core 42 and the outer shell 43 can be changed according to the working conditions to change the spray height. In addition, the electric actuator 41 can use compressed air or electricity as a power source to control the rise and fall of the valve core 42, thereby adjusting the spray intensity and area. The specific principle is: when the amount of latex introduced remains unchanged, the closer the shaping plate 44 is to the bottom of the outer shell, the smaller the gap between the two, the higher the spray intensity and the larger the spray area. Conversely, the farther the shaping plate 44 is from the bottom of the outer shell, the lower the spray intensity and the smaller the spray area. It is well known that the larger the latex spray area, the better the VCM removal effect, but if the spray area is too large, a considerable amount of latex will be sprayed onto the tower wall. Therefore, in actual production, the spray shape can also be changed by changing the shape of the outer shell 43 and the matching valve core 44, for example, changing them to a circle or a square, and setting multiple spray holes on the shaping plate 44 facing the latex channel; or just changing the top shape of the shaping plate 44, for example, setting the top curve of the shaping plate 44 to an umbrella shape with a certain regularity, so as to effectively control the shape of the spray liquid, make the spray area of the latex as large as possible, and at the same time all of it will be sprayed to the bottom of the tower and enter the discharge pipeline 5.

[0047] Preferably, a remote pressure gauge, flow meter and regulating valve are provided on the pipeline between the material inlet 45 and the venturi ejector 22 to control the flow rate and pressure of the material entering the fluid shaping valve 4 to achieve fine adjustment of various parameters of the spraying material at the outlet of the fluid shaping valve 4, thereby making the present invention applicable to various process production links under similar working conditions.

[0048] The steps of the paste resin latex VCM purification and removal system of the present invention are as follows:

[0049] Step 1: The latex enters the VCM gas-liquid separation tank 1 through the feed line 11. The stirring device 12 stirs the latex in the tank. During the stirring process, the VCM gas in the liquid phase rises, and the foam on the upper layer of the liquid phase is broken by the stirring blades. The foam that is not broken gathers at the foam baffle 13 and breaks when passing through the defoaming hole;

[0050] Step 2: The VCM gas released from the latex gradually gathers toward the discharge end and enters the exhaust pipeline;

[0051] Step 3: The latex containing VCM enters the Venturi ejector 22; hot steam with a pressure of 1.0 MPa and a temperature of 180 degrees Celsius is passed into the Venturi mixer to mix with the latex. The heated latex is about 70-80 degrees Celsius and enters the fluid shaping valve 4 through the material inlet 45;

[0052] Step 4: The electric actuator 41 drives the valve core 42 to rise and fall, adjusting the shaping plate 44 to a preset height. The latex is ejected around the gap between the shaping plate 44 and the outer shell 43. The vacuum pressure in the tower is between -0.05 and -0.088 MPaG. Under this vacuum condition, the VCM monomer is further separated from the latex and discharged from the top of the tower to the subsequent process link.

[0053] Step 5: Due to the presence of the cooling pipe 31, a small amount of latex sprayed onto the wall of the VCM gas-liquid separation tower 3 is not easy to form plasticized sheets; most of the latex is discharged from the bottom of the VCM gas-liquid separation tower to the discharge pipeline 5 and enters the VCM gas-liquid separation tank 1. This cycle is repeated until the VCM monomer content of the latex in the VCM gas-liquid separation tank 1 reaches below 200 ppm, and then it can be discharged through the finished latex discharge port to the next process.

[0054] While the present invention has been described above with reference to exemplary embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as no structural conflicts exist, the various features of the disclosed embodiments may be combined with one another in any manner. The omission of an exhaustive description of these combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A VCM recycling system for producing paste resin, characterized by: It includes a VCM gas-liquid separation tank and a VCM gas-liquid separation tower, which are connected in series through a VCM circulation pipeline and a discharge pipeline; The VCM gas-liquid separation tank is a horizontal closed cylindrical tank body and is tilted at a certain angle. The lower side of the VCM gas-liquid separation tank is provided with a raw latex feed port, a circulating latex feed port, and a finished latex discharge port. The upper side of the VCM gas-liquid separation tank is provided with a gas discharge port and a circulating latex discharge port. The VCM gas separated from the latex is discharged into the VCM exhaust pipeline through the gas discharge port. The VCM circulation pipeline is connected between the circulating latex discharge port of the VCM gas-liquid separation tank and the feed end of the VCM gas-liquid separation tower; the latex containing the remaining VCM gas phase enters the VCM gas-liquid separation tower through the circulating latex discharge port and the VCM circulation pipeline for further VCM recovery; the discharge pipeline is connected between the discharge end of the VCM gas-liquid separation tower and the circulating latex feed port of the VCM gas-liquid separation tank, and the latex at the bottom of the VCM gas-liquid separation tower enters the VCM gas-liquid separation tank again through the discharge pipeline.

2. The VCM recycling system for producing paste resin according to claim 1, wherein: A stirring device is provided in the VCM gas-liquid separation tank. The stirring device is arranged vertically. The electrical control part of the stirring device is arranged at the top outside the tank body. A stirring rod is connected below the electrical control part. The stirring rod extends downward to the bottom of the VCM gas-liquid separation tank. At least two layers of stirring blades are provided on the stirring rod along the axial direction.

3. The VCM recycling system for producing paste resin according to claim 2, wherein: The foam layer of the VCM gas-liquid separation tank is provided with at least one layer of stirring blades, and the edges of the stirring blades in the foam layer are provided with a needle-like structure.

4. The VCM recycling system for producing paste resin according to claim 1, wherein: A foam baffle is provided in the VCM gas-liquid separation tank, and the foam baffle extends downward from the top of the VCM gas-liquid separation tank to the center of the tank cross section.

5. The VCM recycling system for producing paste resin according to claim 4, characterized in that: The foam baffle is densely covered with foam removal holes, and the inner walls of the foam removal holes are surrounded by a plurality of spikes, which extend from the inner walls of the foam removal holes to the center.

6. The VCM recycling system for producing paste resin according to claim 1, wherein: The VCM circulation pipeline is equipped with a latex circulation pump, a Venturi ejector and a hot steam delivery pipeline. The latex circulation pump is used to deliver latex to the VCM gas-liquid separation tower; the hot steam delivery pipeline is used to deliver hot steam to the Venturi mixer, and the latex enters the VCM gas-liquid separation tower after being heated by hot steam in the Venturi mixer; a temperature regulating valve and a pressure regulating valve are installed on the hot steam delivery pipeline to respectively adjust the temperature and pressure of the hot steam.

7. The VCM recycling system for producing paste resin according to claim 6, characterized in that: A fluid shaping valve connected to a venturi injector is provided at the top of the VCM gas-liquid separation tower; the fluid shaping valve includes an electric actuator and a main valve body; the main valve body includes a valve core and an outer shell, and the outer shell is sleeved on the outside of the valve core; the outer shell is connected to the top of the VCM gas-liquid separation tower through a flange; the output end of the electric actuator is connected to the top of the valve core and controls the height of the valve core, and a shaping plate is provided at the bottom of the valve core; the space between the outer shell and the valve core provides a tangible channel for the flow of latex, and the latex is ejected through the annular gap between the bottom of the outer shell and the shaping plate; a material inlet is provided on one side above the outer shell, and the material inlet is connected to the discharge end of the venturi injector.

8. The VCM recycling system for producing paste resin according to claim 7, wherein: The shape of the outer shell and the shaping plate may be circular or square; and / or, a plurality of spray holes are provided on the shaping plate at a position facing the glue channel.

9. The VCM recycling system for producing paste resin according to claim 7, wherein: A remote pressure gauge, flow meter and regulating valve are provided on the pipeline between the material inlet and the Venturi ejector.

10. The VCM recycling system for producing paste resin according to claim 1, wherein: A cooling pipe is arranged on the outer wall of the VCM gas-liquid separation tower from top to bottom.

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