Recycling device for broken milk powder of FEP (fluorinated ethylene propylene) receiving tank

Abstract

A recovery device for broken milk powder of an FEP receiving tank comprises the receiving tank, a labyrinth groove, a condensation barrel, a discharging header pipe, a discharging header pipe and a short connecting pipe, one end of the discharging header pipe is closed, the other end of the discharging header pipe is used for being connected with a discharging port of a reaction kettle, one end of the discharging header pipe is closed, the other end of the discharging header pipe supplies materials to the condensation barrel through the labyrinth groove, and a first valve is arranged on the discharging header pipe. The number of the material receiving grooves is multiple, second valves are arranged at feeding ports of the multiple material receiving grooves respectively and connected to the discharging main pipe in parallel, third valves are arranged at discharging ports of the multiple material receiving grooves respectively and connected to the discharging main pipe in parallel and located on the upstream portion of the first valve, and a desalted water inlet is further formed in the discharging main pipe and used for being connected with a desalted water source. The upstream end of the short connecting pipe is connected to the discharging header pipe and located on the upstream of the first valve, and the downstream end of the short connecting pipe is connected with the condensation barrel. The device is simple in structure and convenient to operate, and ensures that the product quality is not obviously changed on the basis of improving the material utilization rate.

Description

Technical Field

[0001] The utility model relates to the field of chemical industry, in particular to a recovery device for demulsified powder of an FEP receiving tank. Background Art

[0002] FEP is obtained by copolymerization of tetrafluoroethylene and hexafluoropropylene. It can be applied to soft plastics, is non-ignitable and can prevent the spread of flames. It has excellent wear resistance and a low friction coefficient. It is mainly used to make linings for pipes and chemical equipment, surface layers of drums, and various wires and cables.

[0003] At present, after the FEP polymerization is completed, the polymerization liquid from the reactor is first discharged to the receiving tank for temporary storage, and then sent to the coagulation barrel. During the discharge from the reactor to the receiving tank, the polymerization liquid will carry some demulsified powder in the reactor. These demulsified powders remain in the discharge tank and need to be scooped out manually and sold as waste, resulting in material waste and high labor intensity. A small amount of demulsified powder will also be produced during the discharge from the discharge tank to the coagulation barrel. These demulsified powders are usually short-chain polymers, which affect the quality of the polymerization liquid.

[0004] Therefore, how to avoid material waste in the FEP production process and ensure product quality is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0005] The utility model aims to provide a FEP collecting tank demulsified powder recovery device in view of the deficiencies in the prior art, which has a simple structure and is easy to operate, and ensures that product quality does not change significantly while improving material utilization.

[0006] The technical scheme of the utility model is: a recovery device for demulsified powder of FEP receiving trough, comprising a receiving trough, a labyrinth trough, a coagulation barrel, and also comprising a discharge main pipe, a discharge main pipe, and a short pipe. One end of the discharge main pipe is closed, and the other end is used to be connected with the discharge port of the reactor. One end of the discharge main pipe is closed, and the other end supplies the coagulation barrel through the labyrinth trough. A first valve is arranged on the discharge main pipe. There are multiple receiving troughs, and the feed ports of multiple receiving troughs are respectively provided with second valves, which are connected in parallel to the discharge main pipe. The discharge ports of multiple receiving troughs are respectively provided with third valves, which are connected in parallel to the discharge main pipe and are located upstream of the first valve. A desalted water inlet is also arranged on the discharge main pipe for being connected to a desalted water source. The upstream end of the short pipe is connected to the discharge main pipe and is located upstream of the first valve. The downstream end of the short pipe is connected to the coagulation barrel, and a fourth valve is arranged on the short pipe.

[0007] The number of the material receiving troughs is four, and the desalted water inlet is arranged at the closed end of the discharge main pipe, so that the four material receiving troughs are located between the desalted water inlet and the reactor.

[0008] The discharge port of one of the material receiving troughs is connected to the closed end of the material discharge main pipe, and the upstream end of the short pipe is connected to the material discharge main pipe and is located between the material receiving trough and the first valve.

[0009] A fifth valve is arranged between the labyrinth groove and the condensation barrel.

[0010] The above technical solution has the following beneficial effects:

[0011] 1. The recovery device of the demulsified powder of the FEP receiving trough includes a receiving trough, a labyrinth trough, a coagulation barrel, a discharge main pipe, a discharge main pipe, and a short pipe, wherein the receiving trough is used to receive the polymer liquid discharged from the reactor and temporarily store it, the labyrinth trough is used to separate the short-chain demulsified powder generated during the discharge process of the receiving trough, and the coagulation barrel is used to demulsify the polymer liquid. One end of the discharge main pipe is closed, and the other end is used to connect with the discharge port of the reactor. One end of the discharge main pipe is closed, and the other end is used to feed the coagulation barrel through the labyrinth trough. The discharge main pipe is provided with a first valve, that is, the flow path entering the labyrinth trough can be closed. There are multiple receiving troughs, and the feed ports of multiple receiving troughs are respectively provided with second valves, and are connected in parallel to the discharge main pipe. The opening and closing of the corresponding receiving trough is controlled by the second valve, so that the flow of a single receiving trough can be reduced, the amount of demulsified powder generated can be reduced, and the needs of continuous feeding and discharging of the receiving trough can be met. The discharge ports of multiple receiving troughs are respectively provided with a third valve, and are connected in parallel to the discharge main pipe, located upstream of the first valve. Under normal circumstances, the third valve of the corresponding receiving trough is opened to discharge the material to the condensation barrel through the labyrinth trough. Since the discharge flow of a single receiving trough decreases, the amount of short-chain demulsified powder generated by the receiving trough during the discharge process can be reduced. A desalted water inlet is also provided on the discharge main pipe, which is used to be connected to a desalted water source. The upstream end of the short pipe is connected to the discharge main pipe, located upstream of the first valve, and the downstream end of the short pipe is connected to the condensation barrel. A fourth valve is provided on the short pipe. When the receiving trough is discharged, the first valve can be closed and the desalted water source can be opened to directly flush the demulsified powder remaining in each receiving trough to the condensation barrel through the short pipe, which effectively reduces the labor intensity and improves the material utilization rate. The applicant has verified through experiments that the addition of demulsified powder in the receiving trough has no obvious effect on the product quality.

[0012] 2. There are four receiving troughs. The desalted water inlet is arranged at the closed end of the discharge main pipe, so that the four receiving troughs are located between the desalted water inlet and the reactor. After the discharge of each receiving trough is completed, the desalted water can also flush the residual material in the discharge main pipe to the condensation barrel to avoid material residue and ensure the utilization rate of the material.

[0013] 3. The discharge port of one of the receiving troughs is connected to the closed end of the discharge main pipe, and the upstream end of the short pipe is connected to the discharge main pipe, which is located between the receiving trough and the first valve. When desalted water is used to flush the residual material and the demulsified powder in the collection tank, the connection structure designed in this way can effectively avoid material residue and ensure the utilization rate of the material.

[0014] Further description is given below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a connection diagram of the utility model.

[0016] In the attached drawings, 1 is a receiving trough, 2 is a labyrinth trough, 3 is a coagulation barrel, 4 is a discharge main pipe, 5 is a discharge main pipe, 6 is a short pipe, 7 is a desalted water inlet, 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

[0017] See also Figure 1 , is a specific embodiment of a recovery device for demulsified powder of FEP receiving trough. The recovery device for demulsified powder of FEP receiving trough comprises a receiving trough 1, a labyrinth trough 2, a coagulation barrel 3, and also comprises a discharge main pipe 4, a discharge main pipe 5, and a short pipe 6. The left end of the discharge main pipe 4 is closed, and the right end extends horizontally, and is used to be connected to the discharge port of the reactor. The left end of the discharge main pipe 5 is closed, and the right end supplies the coagulation barrel 3 through the labyrinth trough 2. The first valve a is arranged on the discharge main pipe 5. There are four receiving troughs 1, and the feed ports of the four receiving troughs 1 are respectively provided with second valves b, and are connected in parallel to the discharge main pipe 4. The discharge ports of the four receiving troughs 1 are respectively provided with third valves c, and are connected in parallel to the discharge main pipe 5, and are located upstream of the first valve a. Specifically, one of the receiving troughs is connected to the left end of the discharge main pipe. The discharge main pipe 4 is also provided with a desalted water inlet 7 for connecting to a desalted water source. In this embodiment, the desalted water inlet 7 is provided at the closed end of the discharge main pipe 4, so that the four receiving tanks 1 are located between the desalted water inlet 7 and the reactor, that is, the desalted water inlet is provided at the left end of the discharge main pipe. The upstream end of the short pipe 6 is connected to the discharge main pipe 5 and is located upstream of the first valve a. Specifically, the upstream end of the short pipe 6 is located between the receiving tank 1 and the first valve a, that is, the upstream end of the short pipe is located on the right side of each receiving tank. The downstream end of the short pipe 6 is connected to the condensation barrel 3, and a fourth valve d is provided on the short pipe 6. In this embodiment, a fifth valve e is provided between the labyrinth tank 2 and the condensation barrel 3.

[0018] The working principle of the utility model is as follows: when the reactor discharges materials into the coagulation barrel normally, the first valve, the second valve, the third valve, and the fifth valve are opened, and the fourth valve is closed. The polymerized liquid synthesized in the reactor enters each receiving tank through the discharge main pipe, and carries part of the demulsified powder to remain in the receiving tank. The polymerized liquid enters the labyrinth tank through the discharge main pipe. In this process, a small amount of short-chain polymers are produced and intercepted by the labyrinth tank. Finally, the polymerized liquid is sent to the coagulation barrel for demulsification treatment. When the reactor is discharged, the first valve and the fifth valve are closed, and the second valve, the third valve, and the fourth valve are opened. Desalted water enters from the left end of the discharge main pipe, flushes the discharge main pipe, and enters each receiving tank, carrying the residual demulsified powder therein and sending it to the coagulation barrel through the short pipe, thereby achieving the purpose of improving material utilization and reducing manual labor intensity.

Claims

1. A device for recovering demulsified powder of FEP receiving tank, comprising a receiving tank (1), a labyrinth tank (2), and a coagulation barrel (3), characterized in that: It also includes a discharge main pipe (4), a discharge main pipe (5), and a short pipe (6). One end of the discharge main pipe (4) is closed, and the other end is used to connect to the discharge port of the reactor. One end of the discharge main pipe (5) is closed, and the other end supplies the coagulation barrel (3) through the labyrinth groove (2). A first valve (a) is arranged on the discharge main pipe (5). The number of the material receiving troughs (1) is multiple, and the feed ports of the multiple material receiving troughs (1) are respectively provided with second valves (b) and are connected in parallel to the material discharge main pipe (4); the discharge ports of the multiple material receiving troughs (1) are respectively provided with third valves (c) and are connected in parallel to the material discharge main pipe (5) and are located upstream of the first valve (a). The discharge main pipe (4) is also provided with a desalted water inlet (7) for connecting to a desalted water source. The upstream end of the short pipe (6) is connected to the discharge main pipe (5) and is located upstream of the first valve (a). The downstream end of the short pipe (6) is connected to the condensation barrel (3), and a fourth valve (d) is provided on the short pipe (6).

2. The device for recovering demulsified powder in the FEP receiving tank according to claim 1, characterized in that: The number of the material receiving tanks (1) is four, and the desalted water inlet (7) is arranged at the closed end of the discharge main pipe (4), so that the four material receiving tanks (1) are located between the desalted water inlet (7) and the reaction kettle.

3. The device for recovering demulsified powder of FEP receiving tank according to claim 1 or 2, characterized in that: The discharge port of one of the material receiving troughs (1) is connected to the closed end of the material discharge main pipe (5), and the upstream end of the short pipe (6) is connected to the material discharge main pipe (5) and is located between the material receiving trough (1) and the first valve (a).

4. The device for recovering demulsified powder in the FEP receiving tank according to claim 1, characterized in that: A fifth valve (e) is provided between the labyrinth groove (2) and the condensation barrel (3).

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