Discharging device for reducing FEP polymerization demulsification material

Abstract

A discharging device for reducing FEP polymerization demulsifying materials comprises a polymerization kettle, a labyrinth groove, a material receiving groove and a demulsifying material recycling groove, the material receiving groove is located below the polymerization kettle, an inlet of the labyrinth groove is provided with a first valve, an outlet of the labyrinth groove is provided with a second valve, the labyrinth groove is arranged in a suspended mode, and the height difference between the labyrinth groove and the polymerization kettle is the same as the height difference between the labyrinth groove and the material receiving groove. An inlet of the labyrinth groove is connected with a discharging opening of the polymerization kettle through a first pipeline, an outlet of the labyrinth groove supplies materials to the receiving groove through a second pipeline, a short connecting pipe is arranged at the bottom of the receiving groove and used for supplying materials to the condensation barrel, a desalted water supplementing opening is formed in an outlet of the labyrinth groove, and a fourth valve is arranged at the upstream of the second valve and the inlet of the demulsification material recycling groove. And the second pipeline is connected to the first pipeline through a third pipeline and located between the first valve and the third valve. The device is simple in structure and low in improvement cost, the demulsification amount caused by the discharging level difference can be effectively reduced, the material utilization rate is guaranteed, and in addition, the labor intensity of workers can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of chemical industry, in particular to a material discharging device for reducing FEP polymerization demulsification material. Background Art

[0002] Chemical companies are in the process of generating FEP. After the FEP polymerization kettle completes the polymerization reaction, the polymer liquid is placed in the receiving tank through the pipeline for temporary storage, and then sent to the condensation barrel for washing, drying and granulation into FEP resin particle products for external sale. In the actual production process, when the polymer liquid is discharged to the receiving tank through the pipeline, due to the large impact of the material level difference, a large amount of demulsified powder appears in the receiving tank. At the same time, in order to ensure the purity of the powder placed in the condensation barrel and prevent the short-chain demulsified materials (unstable substances) generated in the polymerization kettle from entering the condensation barrel and causing the resin product to have crystal points, the polymer liquid needs to be filtered through a maze trough before entering the condensation barrel in the receiving tank, which will cause some of the polymer liquid to be demulsified again during the discharge and filtration process. Therefore, during the production process, a large amount of demulsified materials will appear in both the receiving tank and the filter tank, which need to be manually scooped out as waste for recycling, resulting in serious waste and high labor intensity.

[0003] Therefore, how to design a discharge device for FEP polymerization liquid to avoid material waste is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0004] The purpose of the utility model is to provide a discharge device for reducing FEP polymerization demulsification material in view of the deficiencies in the prior art. The device has a simple structure and low modification cost, can effectively reduce the demulsification amount caused by the discharge position difference, ensure material utilization, and can also effectively reduce manual labor intensity.

[0005] The technical scheme of the utility model is: a discharge device for reducing FEP polymerization demulsifier, comprising a polymerization kettle, a labyrinth trough, a receiving trough, and a demulsifier recovery trough, the receiving trough is located below the polymerization kettle and is staggered, a first valve is arranged at the inlet of the labyrinth trough, and a second valve is arranged at the outlet, the labyrinth trough is suspended by a bracket, and the height difference with the polymerization kettle and the height difference with the receiving trough are the same, the inlet of the labyrinth trough is connected with the discharge port of the polymerization kettle through a first pipeline, the discharge port of the polymerization kettle is provided with a third valve, the outlet of the labyrinth trough supplies the receiving trough through a second pipeline, a short pipe is provided at the bottom of the receiving trough for supplying the coagulation barrel, a desalted water supply port is provided at the outlet of the labyrinth trough, and is located upstream of the second valve, a fourth valve is provided at the inlet of the demulsifier recovery trough, and is connected to the first pipeline through a third pipeline, and is located between the first valve and the third valve.

[0006] There are multiple material receiving troughs, which are connected in parallel with the outlets of the maze trough.

[0007] The short pipe is provided with a fifth valve.

[0008] The above technical solution has the following beneficial effects:

[0009] The discharge device for reducing FEP polymerization demulsifiers includes a polymerization kettle, a labyrinth trough, a receiving trough, and a demulsifier recovery trough, wherein the polymerization kettle is used to polymerize to obtain a polymerization liquid, the labyrinth trough is used to remove short-chain demulsifiers in the polymerization liquid to ensure the quality stability of the granulated product, the receiving trough is used to receive the polymerization liquid and send it to the coagulation barrel as a granulation raw material, and the demulsifier recovery trough is used to recover the short-chain demulsifiers trapped in the labyrinth trough. The receiving trough is located below the polymerization kettle and is staggered, and gravity can be used to discharge the material to reduce energy consumption. A first valve is set at the inlet of the labyrinth trough and a second valve is set at the outlet, that is, the opening and closing of the inlet and outlet of the labyrinth trough can be controlled by the first valve and the second valve. The labyrinth trough is suspended by a bracket, and the height difference with the polymerization kettle and the height difference with the receiving trough are the same. The inlet of the labyrinth trough is connected to the discharge port of the polymerization kettle through a first pipeline, and the discharge port of the polymerization kettle is provided with a third valve. The outlet of the labyrinth trough supplies the receiving trough through a second pipeline. By arranging the labyrinth trough between the polymerization kettle and the receiving trough and keeping the height difference the same, the drop between the polymerization kettle and the labyrinth trough and between the labyrinth trough and the receiving trough can be effectively reduced, the demulsification point can be reduced, the polymerization liquid can be decelerated, and the speed of the polymerization liquid entering the receiving trough can be reduced. During the discharge process, the amount of demulsified material generated in the labyrinth trough and the receiving trough can be minimized, and the short-chain demulsified material generated in the polymerization kettle can be directly separated. A short pipe is provided at the bottom of the receiving trough for feeding the condensation barrel, shortening the feeding path on the basis of reducing the drop. The outlet of the labyrinth tank is provided with a desalted water supply port, which is located upstream of the second valve. After the discharge is completed, since the short-chain demulsified material has been intercepted and filtered by the labyrinth tank, the first valve can be closed, and the demulsified material remaining in the receiving tank can be flushed to the coagulation barrel by injecting desalted water into the receiving tank, thereby reducing the demulsified material waste. The inlet of the demulsified material recovery tank is provided with a fourth valve, which is connected to the first pipeline through the third pipeline and is located between the first valve and the third valve. The second valve and the third valve can be closed, and the first valve and the fourth valve can be opened to use the desalted water to flush the short-chain demulsified material intercepted in the labyrinth tank to the demulsified material recovery tank. In this way, the labyrinth tank can be regenerated, and manual cleaning of the labyrinth tank can be avoided, thereby reducing the labor intensity and improving the use value of the short-chain demulsified material.

[0010] Further description is given below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a connection diagram of the utility model.

[0012] In the attached drawings, 1 is a polymerization kettle, 2 is a labyrinth tank, 3 is a receiving tank, 4 is a demulsified material recovery tank, 5 is a bracket, 6 is a first pipeline, 7 is a second pipeline, 8 is a short pipe, 9 is a desalted water feeding port, 10 is a third pipeline, a is a first valve, b is a second valve, c is a third valve, d is a fourth valve, and e is a fifth valve. DETAILED DESCRIPTION

[0013] See also Figure 1 , is a specific embodiment of a discharge device for reducing FEP polymerization demulsification material. The discharge device for reducing FEP polymerization demulsification material comprises a polymerization kettle 1, a labyrinth trough 2, a receiving trough 3, and a demulsification material recovery trough 4. The receiving trough 3 is located below the polymerization kettle 1 and is arranged in a staggered manner. Usually, there are multiple receiving troughs, which are arranged in parallel. The inlet of the labyrinth trough 2 is provided with a first valve a, and the outlet is provided with a second valve b. The labyrinth trough 2 is suspended by a bracket 5, and the height difference with the polymerization kettle 1 and the height difference with the receiving trough 3 are the same. Usually, the horizontal distance between the labyrinth trough and the polymerization kettle and the horizontal distance between the labyrinth trough and the receiving trough are also the same, that is, multiple receiving troughs can be distributed in a fan shape. The inlet of the labyrinth trough 2 is connected to the discharge port of the polymerization kettle 1 through a first pipeline 6, and the discharge port of the polymerization kettle 1 is provided with a third valve c. The outlet of the labyrinth trough 2 supplies the receiving trough 3 through a second pipeline 7, that is, multiple receiving troughs are connected in parallel with the outlet of the labyrinth trough 2. A short pipe 8 is provided at the bottom of the receiving tank 3 for feeding the coagulation barrel. Usually, a fifth valve e is provided on the short pipe. A desalted water supply port 9 is provided at the outlet of the labyrinth tank 2, which is located upstream of the second valve b. A fourth valve d is provided at the inlet of the demulsified material recovery tank 4, and is connected to the first pipeline 6 through the third pipeline 10, and is located between the first valve a and the third valve c. Obviously, the demulsified material recovery tank is located below the labyrinth tank.

[0014] The working principle of the utility model is as follows: the polymer liquid (including the generated short-chain demulsifier and a small amount of conventional demulsifier) ​​generated in the polymerization kettle is sent to the labyrinth tank through the discharge port and the first pipeline, and the short-chain demulsifier is intercepted. The polymer liquid carries the conventional demulsifier into the receiving tank through the second pipeline. This process further generates a small amount of conventional demulsifier (which can be used for granulation) and is sent to the condensation tank through the short pipe as a granulation raw material. When the discharge is completed, the first valve is closed, and desalted water is injected into the receiving tank through the desalted water feeding port to flush the residual demulsifier in the receiving tank into the condensation tank, thereby reducing the waste of demulsification. Then the second valve and the third valve are closed, the first valve and the fourth valve are opened, and desalted water is added through the desalted water feeding port to flush the short-chain demulsifier intercepted in the labyrinth tank into the demulsifier recovery tank.

Claims

1. A discharge device for reducing FEP polymer demulsification, characterized in that: The invention comprises a polymerization kettle (1), a labyrinth tank (2), a material receiving tank (3) and a demulsified material recovery tank (4). The material receiving tank (3) is located below the polymerization kettle (1) and is arranged in a staggered manner. The inlet of the labyrinth trough (2) is provided with a first valve (a), and the outlet is provided with a second valve (b). The labyrinth trough (2) is suspended in the air by a bracket (5), and the height difference between the labyrinth trough (2) and the polymerization kettle (1) is the same as the height difference between the labyrinth trough (2) and the receiving trough (3). The inlet of the labyrinth trough (2) is connected to the discharge port of the polymerization kettle (1) through the first pipeline (6), and the discharge port of the polymerization kettle (1) is provided with a third valve (c). The outlet of the labyrinth trough (2) supplies the receiving tank (3) through the second pipeline (7). A short pipe (8) is provided at the bottom of the receiving tank (3) for supplying the coagulation barrel. The outlet of the labyrinth trough (2) is provided with a desalted water supply port (9) located upstream of the second valve (b). A fourth valve (d) is provided at the inlet of the demulsified material recovery tank (4), and is connected to the first pipeline (6) via a third pipeline (10), and is located between the first valve (a) and the third valve (c).

2. The discharge device for reducing FEP polymerization demulsification according to claim 1, characterized in that: There are multiple material receiving troughs (3) connected in parallel with the outlets of the labyrinth trough (2).

3. The discharge device for reducing FEP polymerization demulsification according to claim 1, characterized in that: The short pipe (8) is provided with a fifth valve (e).

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