Foam eliminator

Abstract

The utility model relates to a foaming eliminator, including the casing (1), the casing (1) is cylindrical, and two ends are feed inlet (11) and discharge gate (12) respectively, is provided with the dosing port (13) on the lateral wall, the mixing device for making the fast mixing of medicament and material is provided in the casing (1), the dosing port (13) is located on the casing (1) one end near the discharge gate (12), the mixing device is set up in the casing (1), and is located between dosing port (13) and feed inlet (11). The utility model can eliminate the foam in material quickly, reaches the effect of eliminating the foam in material.

Description

Technical Field

[0001] This utility model relates to a foam eliminator, and more particularly to the structure of a foam eliminator. Background Technology

[0002] Polyvinyl chloride (PVC) paste resin refers to this type of resin that is mainly used in the form of paste. It is also known as plasticizer paste. It has the characteristics of stable performance, easy control, excellent product performance and good chemical stability. It is widely used in the production of artificial leather, paint coatings, foamed plastics and so on.

[0003] Polyvinyl chloride (PVC) paste resin is usually produced by emulsion method and micro-suspension method. The emulsion method uses vinyl chloride monomer to polymerize in the aqueous phase. If there is already a polymer latex, by controlling the material ratio and conditions, the vinyl chloride monomer will polymerize only on the already generated latex particles and no new particles will be formed. Therefore, it is called "emulsion seed polymerization".

[0004] The micro-suspension method uses vinyl chloride monomer as raw material to polymerize and prepare two types of seeds: emulsion seeds and MSP seeds under the action of desalinated water, dispersants and initiators. Then, polyvinyl chloride paste resin (EPVC) latex is produced by micro-suspension polymerization. The latex is then dried into a white powder by equipment such as fluidized bed. Finally, it is ground into EPVC finished product with appropriate particle size by a grinder.

[0005] After the EPVC latex reaction is complete, some unreacted vinyl chloride monomer needs to be recovered (i.e., degassed). This is to reduce residual vinyl chloride in the product and decrease the consumption of vinyl chloride monomer. The degasing method involves storing the EPVC latex in a storage tank and using a vacuum pump to extract the gaseous vinyl chloride monomer from the top of the tank. Because anionic surfactants are added during polymerization, foam is easily generated in the EPVC latex during degasing. This foam carries EPVC latex, vinyl chloride, and other substances, which continue to react in the degasing system, forming white self-polymers. This affects the efficiency of subsequent reactions and drying, leading to incomplete reactions and impacting product quality.

[0006] To reduce self-polymerization in the degassing system, existing methods typically maintain the degassing regulating valve opening within a certain range, preventing it from reaching its maximum opening. This results in low degassing efficiency, long degassing time, and ultimately affects the output of polyvinyl chloride paste resin production workshops.

[0007] The purpose of this invention is to solve problems such as foaming in polyvinyl chloride paste resin latex, which leads to severe self-polymerization in the equipment during degassing, resulting in low degassing efficiency and reduced output. Summary of the Invention

[0008] To solve the above problems, this utility model provides a foam eliminator, including a shell 1, which is cylindrical with an inlet 11 and an outlet 12 at its two ends, respectively. A dosing port 13 is provided on the side wall. A mixing device for rapidly mixing the agent and the material is provided inside the shell 1. The dosing port 13 is located on the shell 1 near the outlet 12. The mixing device is located inside the shell 1, between the dosing port 13 and the inlet 11.

[0009] In use, the feed inlet 11 is connected to the outlet 51 of the degassing device 5, the outlet is connected to the vinyl chloride recovery device, and the dosing port 13 is connected to the pipeline for conveying the foam-eliminating agent. The vinyl chloride gas with a small amount of foam (hereinafter referred to as the material) after being treated by the degassing device 5 enters the shell 1 from the feed inlet 11. The foam is broken by the mixing device, and the foam-eliminating agent enters the shell 1 from the dosing port 13 and is quickly dispersed into the vinyl chloride gas with foam. The remaining foam in the vinyl chloride gas foam is quickly broken, and the clean vinyl chloride gas is discharged through the outlet 12 for use.

[0010] This invention features a cylindrical housing 1 with a dosing port 13 on the side wall of the housing 1. Inside the housing 1, a mixing device is installed to rapidly mix the agent and the material. When the material flows into the housing 1, some of the foam in the material is broken by impacting the mixing device. Then, under the action of the mixing device, the foam-eliminating agent is mixed with the material, thereby rapidly breaking the remaining foam in the material and achieving the effect of eliminating foam in the material.

[0011] Preferably, the mixing device is a spiral distribution disc 2, which is mounted inside the housing 1 via a support 3. By using a spiral distribution disc 2 as the mixing device, the materials and agents flowing through the housing 1 can be dispersed, promoting the swirling mixing of materials and agents and improving the breaking efficiency and effect of foam in the materials.

[0012] Preferably, the support 3 includes a pressure plate 31 and a guide rod 32. The pressure plate 31 is located outside the discharge port 12 and is pressed onto the discharge port 12. One end of the guide rod 32 is fixedly connected to the pressure plate 31 through a support rod 33, and the other end extends into the housing 1 and is fixedly connected to the spiral distribution plate 2.

[0013] Preferably, the spiral distribution disk 2 includes a support ring 21 and a plurality of spiral guide vanes 22 disposed within the support ring 21. The inner diameter of the support ring 21 corresponds to the inner diameter of the housing 1 and is fitted inside the housing 1. The spiral guide vanes 22 are inclined and fixedly connected at one end to the support ring 21 and at the other end to the guide rod 32. The plurality of spiral guide vanes 22 are evenly arranged along the outer periphery of the guide rod 32.

[0014] Therefore, by setting multiple spiral guide vanes 22 on the spiral distribution disk 2, the material flow rate can be reduced when the material flows through the spiral distribution disk 2, so that the foam is broken after colliding with the spiral distribution disk 2. Through the dispersing and guiding effect of the spiral guide vanes 22, the material flowing through the spiral distribution disk 2 is fully mixed with the agent, thereby improving the efficiency and effect of eliminating foam in the material.

[0015] Preferably, the device also includes a nozzle 4, which is disposed inside the housing 1 and connected to the dosing port 13 via a connecting pipe 41, with internal communication. By using the nozzle 4, the agent is sprayed and dispersed into the material flowing through the housing 1, thereby improving the foam elimination effect in the material.

[0016] Preferably, the nozzle 4 is located in the middle of the housing 1, and the nozzle of the nozzle 4 faces the spiral distribution disk 2. By setting the nozzle 4 in the middle of the housing 1 and making the nozzle of the nozzle 4 face the spiral distribution disk 2, the material and the agent are quickly mixed under the action of the spiral distribution disk 2, thereby further improving the foam breaking efficiency and breaking effect.

[0017] Preferably, the spiral distribution disk 2 is provided with twelve spiral guide vanes 22. By providing twelve spiral guide vanes 22 on the spiral distribution disk 2, the material in the shell 1 can be better spirally distributed, so that the material and the agent are fully mixed, thereby achieving the purpose of eliminating foam in the material, and the structure is simple.

[0018] Preferably, the nozzle 4 is a rotatable nozzle.

[0019] Preferably, an inlet flange 14 is provided on the feed inlet 11, and an outlet flange 15 is provided on the discharge outlet 12. By providing flanges on the feed inlet 11 and the discharge outlet 12, it is convenient to connect the equipment to the material conveying pipeline, and the connection strength and sealing performance can be improved.

[0020] Preferably, the foam eliminator is used to eliminate foam in polyvinyl chloride paste resin latex during degassing. The inlet 11 is connected to the outlet of the degassing device, the outlet 12 is connected to the vinyl chloride recovery device, and the dosing port 13 is connected to the pipeline for conveying the agent. Attached Figure Description

[0021] Figure 1 Schematic diagram of the overall structure of the foam eliminator;

[0022] Figure 2 Schematic diagram of the internal structure of the shell;

[0023] Figure 3 Schematic diagram of the inlet end of the foam eliminator;

[0024] Figure 4 Schematic diagram of the outlet end of the foam eliminator;

[0025] Figure 5 A diagram illustrating the usage status of a foam eliminator.

[0026] In the diagram, 1. Shell, 11. Inlet, 12. Outlet, 13. Dosing port, 14. Inlet flange, 15. Outlet flange, 2. Spiral distribution disc, 21. Support ring, 22. Spiral guide vane, 3. Bracket, 31. Pressure plate, 32. Guide rod, 33. Support rod, 4. Nozzle, 41. Connecting pipe, 5. Degassing device, 51. Air outlet, 52. Air inlet, 53. Discharge port. Detailed Implementation

[0027] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0028] This embodiment uses the process of producing polyvinyl chloride (PVC) paste resin from vinyl chloride monomer via micro-suspension as an example. After the EPVC latex reaction is complete, it is stored in a storage tank. When recovering unreacted vinyl chloride monomer (vinyl chloride gas) from the EPVC latex, the gaseous vinyl chloride monomer is extracted from the top of the storage tank using a vacuum pump and transported to the degassing device for separation through a conveying pipeline. This foam eliminator is installed at the outlet of the degassing device to eliminate foam generated in the PVC paste resin latex during degassing. The inlet 11 is connected to the outlet of the degassing device, the outlet 12 is connected to the vinyl chloride recovery device through a pipeline, and the dosing port 13 is connected to the pipeline for conveying the foam eliminator. The structure of this device is described in detail below.

[0029] like Figure 1 and Figure 2 As shown, the foam eliminator includes a housing 1 and a nozzle 4. The housing 1 is cylindrical with an inlet 11 and an outlet 12 at its two ends, respectively. A dosing port 13 is provided on the side wall. The housing 1 is equipped with a mixing device for rapidly mixing the agent (foam eliminator) and the vinyl chloride gas (hereinafter referred to as material) carrying foam.

[0030] An inlet flange 14 is provided on the feed inlet 11, and an outlet flange 15 is provided on the discharge outlet 12. The flanges on the feed inlet 11 and the discharge outlet 12 facilitate connection with other equipment and improve the strength and sealing of the connection.

[0031] The dosing port 13 is located on the shell 1 at one end near the discharge port 12.

[0032] The mixing device is located inside the housing 1, between the dosing port 13 and the feed port 11. The mixing device is a spiral distribution disc 2, which is set inside the housing 1 by a bracket 3.

[0033] The mixing device is a spiral distribution disc 2, which can first break up the foam by impact, and also disperse and guide the materials and agents flowing through the shell 1, promote the swirling mixing of materials and foam eliminators, and improve the efficiency and effect of foam elimination.

[0034] The nozzle 4 is located inside the housing 1, in the middle of the housing 1. The nozzle of the nozzle 4 faces the spiral distribution disk 2. The nozzle 4 is fixedly connected to the dosing port 13 through the connecting pipe 41 and is internally connected.

[0035] The nozzle 4 is a rotatable nozzle, which can spray the agent towards the outer periphery of the spiral distribution disk 2 under pressure impact, thereby improving the dispersion of the agent.

[0036] The nozzle 4 is positioned in the middle of the housing 1, with its nozzle facing the spiral distribution disc 2. The nozzle 4 can spray and disperse the foam-eliminating agent into the material inside the housing 1. Under the action of the spiral distribution disc 2, the foam-eliminating agent is more evenly dispersed in the material, thus improving the foam elimination effect.

[0037] like Figure 2 and Figure 3 As shown, the bracket 3 includes a pressure plate 31 and a guide rod 32. The pressure plate 31 is located outside the discharge port 12 and is pressed onto the outlet flange 15 of the discharge port 12.

[0038] One end of the guide rod 32 is fixedly connected to the pressure plate 31 via the support rod 33, and the other end extends into the housing 1, with its end fixedly connected to the spiral distribution plate 2.

[0039] like Figure 2 and Figure 4 As shown, the spiral distribution disk 2 includes a support ring 21 and a plurality of spiral guide vanes 22 disposed within the support ring 21. The inner diameter of the support ring 21 corresponds to the inner diameter of the housing 1 and is fitted inside the housing 1.

[0040] The spiral guide vane 22 is inclined, with one end fixedly connected to the support ring 21 and the other end fixedly connected to the guide rod 32. Multiple spiral guide vanes 22 are evenly arranged along the outer circumference of the guide rod 32.

[0041] Therefore, by setting multiple spiral guide vanes 22 on the spiral distribution disk 2, the material flow rate can be reduced, causing the foam to break after colliding with the spiral distribution disk 2. Through the dispersing and guiding effect of the spiral guide vanes 22, the material and the foam elimination agent are mixed in a swirling flow, thereby improving the efficiency and effect of eliminating foam in the material.

[0042] In this embodiment, the spiral distribution disk 2 is provided with twelve spiral guide vanes 22. In other embodiments, the spiral distribution disk 2 may be provided with other numbers of spiral guide vanes 22, such as ten or sixteen. Providing twelve spiral guide vanes 22 on the spiral distribution disk 2 allows for excellent mixing of the material and the agent, achieving the purpose of eliminating foam in the material, and also has a simple structure.

[0043] like Figure 5 As shown, when this utility model is used, the feed inlet 11 is connected to the outlet 51 of the degassing device 5, the outlet 12 is connected to the vinyl chloride recovery device through a pipeline, and the dosing port 13 is connected to the pipeline for conveying the foam-eliminating agent. The vinyl chloride gas with foam enters the degassing device 5 from the inlet 52 for treatment. The vinyl chloride gas with a small amount of foam after being treated by the degassing device 5 (hereinafter referred to as the material) enters the shell 1 from the feed inlet 11. The foam is broken by the mixing device. The foam-eliminating agent enters the shell 1 from the dosing port 13 and is quickly dispersed into the vinyl chloride gas with foam. The remaining foam in the vinyl chloride gas foam is quickly broken. The clean vinyl chloride gas is discharged through the outlet 12 and used. The broken foam forms liquid and is discharged from the discharge port 53 of the degassing device 5.

[0044] This invention features a cylindrical housing 1 with a dosing port 13 on its side wall and a mixing device inside the housing 1 for rapidly mixing the foam-eliminating agent and the material. Under the action of the mixing device, the foam-eliminating agent and the material can be quickly and fully mixed, thereby rapidly breaking up the foam in the material and achieving the effect of eliminating the foam in the material.

[0045] By setting the mixing device as a spiral distribution disc 2, the material flow rate can be reduced, causing the foam to break upon collision with the spiral distribution disc 2. This disperses and guides the material and agent flowing through the shell 1, improving the mixing efficiency of the material and the foam-eliminating agent, and thus enhancing the foam elimination effect. Positioning the nozzle 4 in the middle of the shell 1, with its nozzle facing the spiral distribution disc 2, allows the foam-eliminating agent to be sprayed onto the disc 2, further improving the mixing efficiency of the material and the foam-eliminating agent and enhancing the foam elimination effect in the material.

[0046] It should be noted that the above embodiments are illustrative of the present invention and not limiting of the present invention. The foam eliminator can be used not only to eliminate foam generated in polyvinyl chloride paste resin latex, but also to eliminate foam in other materials.

Claims

1. A foam eliminator, characterized in that, Including the shell (1), The shell (1) is cylindrical, with an inlet (11) and an outlet (12) at both ends. A dosing port (13) is provided on the side wall. A mixing device for rapidly mixing the medicine and materials is provided inside the shell (1). The dosing port (13) is located on the shell (1) at one end near the discharge port (12); The mixing device is located inside the housing (1), between the dosing port (13) and the feed port (11).

2. The foam eliminator according to claim 1, characterized in that, The mixing device is a spiral distribution disk (2). The spiral distribution disk (2) is mounted inside the housing (1) via a bracket (3).

3. The foam eliminator according to claim 2, characterized in that, The bracket (3) includes a pressure plate (31) and a guide rod (32). The pressure plate (31) is located outside the discharge port (12) and is pressed onto the discharge port (12); One end of the guide rod (32) is fixedly connected to the pressure plate (31) via the support rod (33), and the other end extends into the interior of the housing (1), with the end fixedly connected to the spiral distribution plate (2).

4. The foam eliminator according to claim 3, characterized in that, The spiral distribution disk (2) includes a support ring (21) and multiple spiral guide vanes (22) disposed within the support ring (21). The inner diameter of the support ring (21) corresponds to the inner diameter of the shell (1) and is fitted inside the shell (1); The spiral guide vane (22) is inclined, with one end fixedly connected to the support ring (21) and the other end fixedly connected to the guide rod (32); Multiple spiral guide vanes (22) are evenly arranged along the outer periphery of the guide rod (32).

5. The foam eliminator according to claim 4, characterized in that, It also includes the nozzle (4). The nozzle (4) is located inside the housing (1) and is connected to the dosing port (13) via a connecting pipe (41), and the interior is interconnected.

6. The foam eliminator according to claim 5, characterized in that, The nozzle (4) is located in the middle of the housing (1), and the nozzle of the nozzle (4) faces the spiral distribution disk (2).

7. The foam eliminator according to claim 6, characterized in that, The spiral distribution disk (2) is provided with twelve spiral guide vanes (22).

8. The foam eliminator according to claim 7, characterized in that, The nozzle (4) is a rotatable nozzle.

9. The foam eliminator according to any one of claims 1 to 8, characterized in that, The feed inlet (11) is provided with an inlet flange (14), and the discharge outlet (12) is provided with an outlet flange (15).

10. The foam eliminator according to claim 9, characterized in that, The feed inlet (11) is used to connect with the air outlet of the degassing device; The discharge port (12) is used to connect with the vinyl chloride recovery device; The dosing port (13) is used to connect with the pipeline for delivering the drug.

Images