Gas-solid separation anti-blocking device for polyvinyl chloride slurry recovery

Abstract

The utility model relates to polymeric polyvinyl chloride slurry recovery technical field especially relates to a kind of polyvinyl chloride slurry recovery gas-solid separation anti-blocking device, including slurry tank, slurry tank outside is provided with cyclone separator, cyclone separator top outside is provided with gas cabinet, cyclone separator bottom is connected with buffer tank, buffer tank bottom is provided with feed auger, cyclone separator and buffer tank top outside are connected with flush branch pipe;The utility model is through the way of solid-gas separation, when recycling slurry, residual vinyl chloride in slurry tank is transported to cyclone separator by self-pressing, gas-solid separation is carried out using cyclone separator, the gas obtained by separation is recycled into gas cabinet, the vinyl chloride resin particles obtained by separation are into buffer tank, using feed auger to recycle particles into slurry tank, finally, using flush branch pipe to flush residual particles in device into slurry tank, to ensure that vinyl chloride is recovered smoothly, avoid vinyl chloride resin long-term accumulation to block device.

Description

Technical Field

[0001] This utility model relates to the field of polyvinyl chloride slurry recycling technology, and in particular to a gas-solid separation anti-clogging device for polyvinyl chloride slurry recycling. Background Technology

[0002] After the polyvinyl chloride (PVC) polymerization reaction is completed, the produced PVC resin needs to be pumped to a slurry tank. The purpose of the slurry tank is to buffer the PVC resin and recover the residual vinyl chloride in the slurry to the gas holder for reuse, thereby reducing the reaction cost.

[0003] During the process of recovering residual vinyl chloride from the slurry in the slurry tank, some polyvinyl chloride resin foam is carried into the recovery system (mainly in the recovery main pipe and the slurry tank liquid seal). Long-term accumulation of polyvinyl chloride resin in the recovery main pipe may lead to poor recovery, frequently interrupting the discharge from the polymerization reactor and restricting polymerization capacity. Furthermore, long-term accumulation of polyvinyl chloride resin in the slurry tank liquid seal will also reduce the liquid seal pressure, causing vinyl chloride to overflow, polluting the environment, and posing significant safety hazards.

[0004] Therefore, in response to the potential for clogging in existing polyvinyl chloride (PVC) slurry recovery devices, which can easily lead to PVC overflow and restrict polymerization capacity, a gas-solid separation anti-clogging device for PVC slurry recovery can be designed. By separating solid and gas, the device can ensure smooth PVC recovery, prevent long-term accumulation of PVC resin that could clog the device, avoid PVC overflow, and guarantee polymerization capacity, thereby effectively enhancing the practical value of the device. Utility Model Content

[0005] To overcome the problems that most PVC slurry recovery devices may experience poor recovery due to long-term accumulation of PVC resin, which may frequently interrupt the discharge from the polymerization reactor and restrict polymerization capacity, and that long-term accumulation of PVC resin in the slurry tank liquid seal may also reduce the liquid seal pressure and cause PVC overflow, this utility model is proposed.

[0006] The technical solution of this utility model is as follows: a gas-solid separation anti-clogging device for polyvinyl chloride slurry recycling, comprising a slurry tank, an air inlet pipe, a cyclone separator, a recovery pipe, an anti-leakage component, a gas holder, a control panel, a buffer tank, a discharge pipe, a conveying auger, a discharge tee, a discharge pipe, a flushing branch pipe, and a flushing component. An air inlet pipe is connected to the top outer side of the slurry tank, and a cyclone separator is connected to the top of the air inlet pipe. A recovery pipe is installed on the outer side of the top of the cyclone separator, and an anti-leakage component is installed on the outer side of the recovery pipe. A gas holder is connected to the bottom of the recovery pipe, and a control panel is installed on the outer side of the gas holder. A buffer tank is connected to the bottom of the cyclone separator, and a discharge pipe is installed at the bottom of the buffer tank. A conveying auger is installed inside the discharge pipe, and a discharge tee is installed at one end of the discharge pipe. Discharge pipes are connected to both ends of the discharge tee. A flushing branch pipe is connected to the outer top of the cyclone separator and the buffer tank, and a flushing component is installed at one end of the flushing branch pipe.

[0007] Preferably, the vinyl chloride resin obtained from the reaction is recovered through a slurry tank. Residual vinyl chloride in the resin is then conveyed by a self-pressurized inlet pipe to a cyclone separator for gas-solid separation. This process prevents vinyl chloride resin particles from entering the recovery pipe. The separated gas is then returned to a gas holder via the recovery pipe. Some of the vaporized vinyl chloride in the recovery pipe liquefies into condensate, which is recovered using a leak-proof component. A liquid seal is also applied to the recovery pipe to prevent vinyl chloride gas leakage. The separated vinyl chloride resin particles enter a buffer tank. The conveying auger is controlled via a control panel. The auger conveys the granules through the discharge pipe to the discharge tee, which then transfers them to the discharge pipe, thus recovering the granules into the slurry tank. Two slurry tanks are used, one as a backup. Before use, the discharge tee is switched to open the corresponding slurry tank passage. Mother liquor is injected into the cyclone separator and buffer tank through the flushing branch pipe for flushing, flushing the granules from the cyclone separator and buffer tank into the slurry tank. This ensures smooth vinyl chloride recovery, prevents long-term accumulation and blockage of the device by vinyl chloride resin, avoids vinyl chloride spillage, guarantees polymerization capacity, and enhances the practical value of the device.

[0008] Preferably, two sets of slurry tanks are symmetrically arranged. The top end of the air inlet pipe is connected to the air pipe of the cyclone separator in a three-way connection, and the other end of the discharge pipe is connected to the slurry tank.

[0009] Preferably, the flushing assembly includes a water tank, an inlet pipe, and a flushing main pipe. The water tank is located on the outside of the buffer tank, and the inlet pipe is connected through the top of the water tank. The flushing main pipe is also connected through the top of the water tank, and one end of the flushing branch pipe is connected through the flushing main pipe.

[0010] Preferably, the flushing assembly also includes a water pump and a solenoid water valve. The water pump is installed on the outside of the main flushing pipe, and the solenoid water valve is installed on the outside of the branch flushing pipe. The water pump and the solenoid water valve are electrically connected to the control panel.

[0011] Preferably, the leak-proof component includes a liquid seal pipe and a liquid seal mechanism, with the liquid seal pipe being connected through to the bottom outer side of the recovery pipe, and the liquid seal mechanism being provided at the bottom end of the liquid seal pipe.

[0012] Preferably, a drive motor is installed at the top outer side of the discharge pipe, and a solenoid valve is installed on the outer side of the feed pipe. The drive motor and the solenoid valve are electrically connected to the control panel, and the drive motor drives the drive shaft of the conveying auger to rotate.

[0013] Preferably, a feed pipe is connected to the top of the outer side of the slurry tank, a pressure pump is installed on the outer side of the air inlet pipe, and a check valve is installed at the top of the air inlet pipe. The pressure pump and the check valve are electrically connected to the control panel.

[0014] The beneficial effects of this utility model are:

[0015] During slurry recovery, the vinyl chloride resin obtained from the reaction is recovered into the slurry tank. Residual vinyl chloride in the resin is conveyed under pressure to a cyclone separator via an inlet pipe. The cyclone separator performs gas-solid separation, and the separated gas is recovered to a gas holder via a recovery pipe. The separated vinyl chloride resin particles enter a buffer tank. The conveying auger is controlled via a control panel, and the auger conveys the particles through a discharge pipe to a discharge tee. The particles are then conveyed through the discharge tee to the discharge pipe, thus recovering them into the slurry tank. Two sets of slurry tanks are kept in reserve. Before use, the feeding tee is switched to open the corresponding slurry tank passage. Finally, the mother liquor is injected into the cyclone separator and buffer tank through the flushing branch pipe for flushing treatment. This further flushes the residual particles in the cyclone separator and buffer tank into the slurry tank, which solves the problem that long-term accumulation of PVC resin in most PVC slurry recovery devices may lead to poor recovery, frequent interruptions of the polymerization reactor discharge, and restriction of polymerization capacity. In addition, long-term accumulation of PVC resin in the slurry tank liquid seal will also reduce the liquid seal pressure, leading to PVC overflow and environmental pollution. This enhances the practical value of the device. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of a gas-solid separation and anti-clogging device for polyvinyl chloride slurry recycling according to this utility model.

[0017] Figure 2 The diagram shown is a three-dimensional structural schematic of the flushing component of a gas-solid separation anti-clogging device for polyvinyl chloride slurry recycling according to this utility model.

[0018] Figure 3The diagram shown is a three-dimensional cross-sectional view of the discharge pipe of a gas-solid separation anti-clogging device for polyvinyl chloride slurry recycling according to this utility model.

[0019] Figure 4 The diagram shown is a three-dimensional structural schematic of the anti-leakage component of a gas-solid separation anti-clogging device for polyvinyl chloride slurry recycling according to this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Slurry tank; 101. Feed pipe; 2. Air inlet pipe; 201. Pressure pump; 202. Check valve; 3. Cyclone separator; 4. Recovery pipe; 401. Liquid seal pipe; 402. Liquid seal mechanism; 5. Gas holder; 6. Control panel; 7. Buffer tank; 8. Discharge pipe; 9. Conveying auger; 901. Drive motor; 10. Discharge tee; 11. Discharge pipe; 1101. Solenoid valve; 12. Flushing branch pipe; 1201. Water tank; 1202. Water inlet pipe; 1203. Flushing main pipe; 1204. Water pump; 1205. Solenoid water valve. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figure 1 and Figure 3 This utility model provides an embodiment: a gas-solid separation anti-clogging device for polyvinyl chloride (PVC) slurry recycling, comprising a slurry tank 1, an air inlet pipe 2, a cyclone separator 3, a recycling pipe 4, an anti-leakage component, a gas tank 5, a control panel 6, a buffer tank 7, a discharge pipe 8, a conveying auger 9, a discharge tee 10, a discharge pipe 11, a flushing branch pipe 12, and a flushing component. Two sets of slurry tanks 1 are symmetrically arranged. The air inlet pipe 2 is connected to the top of the outer side of the slurry tank 1, and the top of the air inlet pipe 2 is connected to the cyclone separator 3. Gas-solid separation is performed through the cyclone separator 3 to prevent PVC resin from entering the recycling pipe 4 and causing blockage. The top of the air inlet pipe 2 is connected to the air pipe of the cyclone separator 3 in a tee-like manner. The recycling pipe is located on the outer side of the top of the cyclone separator 3. 4. A leak-proof component is installed on the outside of the recovery pipe 4. A gas holder 5 is connected through the bottom of the recovery pipe 4. A control panel 6 is installed on the outside of the gas holder 5. A buffer tank 7 is connected through the bottom of the cyclone separator 3. A discharge pipe 8 is installed at the bottom of the buffer tank 7. A conveying auger 9 is installed inside the discharge pipe 8. A discharge tee 10 is installed at one end of the discharge pipe 8. A discharge pipe 11 is connected through both ends of the discharge tee 10. The other end of the discharge pipe 11 is connected through the slurry tank 1. A flushing branch pipe 12 is connected through the top outside of the cyclone separator 3 and the buffer tank 7. The cyclone separator 3 and the buffer tank 7 are flushed using the flushing branch pipe 12 to flush and recover the residual polyvinyl chloride resin particles into the slurry tank 1. A flushing component is installed at one end of the flushing branch pipe 12.

[0023] Please see Figure 2In this embodiment, the rinsing assembly includes a water tank 1201, an inlet pipe 1202, a main rinsing pipe 1203, a water pump 1204, and a solenoid water valve 1205. The water tank 1201 is located on the outside of the buffer tank 7. The inlet pipe 1202 is connected through the top of the water tank 1201, and the main rinsing pipe 1203 is also connected through the top of the water tank 1201. One end of the rinsing branch pipe 12 is connected through the main rinsing pipe 1203. The water pump 1204 is located on the outside of the main rinsing pipe 1203, and the solenoid water valve 1205 is located on the outside of the rinsing branch pipe 12. The water pump 1204 and the solenoid water valve 1205 are connected to the control... The control panel 6 is electrically connected to the water tank 1201 through the water inlet pipe 1202. The water pump 1204 is started using the control panel 6 to pump the mother liquor water in the water tank 1201 into the main flushing pipe 1203. The control panel 6 controls the opening and closing of the solenoid water valve 1205 to flexibly control the opening and closing of the two sets of flushing branch pipes 12. The mother liquor water in the main flushing pipe 1203 is transported to the cyclone separator 3 or the buffer tank 7 through the flushing branch pipes 12, thereby fully flushing and recovering the residual polyvinyl chloride resin particles in the cyclone separator 3 or the buffer tank 7.

[0024] Please see Figure 4 In this embodiment, the leak prevention component includes a liquid seal pipe 401 and a liquid seal mechanism 402. The liquid seal pipe 401 is connected to the bottom outer side of the recovery pipe 4. The liquid seal mechanism 402 is provided at the bottom of the liquid seal pipe 401. The condensate obtained by liquefaction in the recovery pipe 4 is transported to the liquid seal mechanism 402 through the liquid seal pipe 401. The liquid seal mechanism 402 is used to perform liquid seal treatment on the recovery pipe 4 to prevent the leakage of vinyl chloride gas.

[0025] Please see Figure 1 and Figure 3 In this embodiment, a drive motor 901 is installed at the outer top of the discharge pipe 8, and a solenoid valve 1101 is installed at the outer side of the discharge pipe 11. The drive motor 901 and the solenoid valve 1101 are electrically connected to the control panel 6. The drive motor 901 drives the drive shaft of the conveying auger 9 to rotate. The control panel 6 flexibly controls the operating status of the drive motor 901. The drive motor 901 drives the conveying auger 9 to rotate, thereby flexibly recovering the residual polyvinyl chloride resin particles in the buffer tank 7. The outer top of the slurry tank 1 is connected to the inlet... A pressurizing pump 201 is installed on the outside of the feed pipe 101 and the air inlet pipe 2. A check valve 202 is installed at the top of the air inlet pipe 2. The pressurizing pump 201 and the check valve 202 are electrically connected to the control panel 6. The polyvinyl chloride resin obtained from the reaction is transported to the slurry tank 1 through the feed pipe 101. The control panel 6 controls the operation of the pressurizing pump 201. The pressurizing pump 201 pressurizes and transports the vinyl chloride in the slurry tank 1 to the cyclone separator 3. The check valve 202 is used to prevent the backflow of vinyl chloride gas in the air inlet pipe 2, ensuring the stability of the gas transport path.

[0026] During the slurry recovery process, the polyvinyl chloride resin obtained from the reaction is transported to the slurry tank 1 through the feed pipe 101. The pressure pump 201 and check valve 202 are started through the control panel 6. The pressure pump 201 is used to transport the residual vinyl chloride in the vinyl chloride resin in the slurry tank 1 to the cyclone separator 3 by self-pressure through the air inlet pipe 2. At the same time, the check valve 202 is used to prevent the vinyl chloride in the air inlet pipe 2 from flowing back.

[0027] Subsequently, gas-solid separation is performed by cyclone separator 3. The separated gas is recovered to gas holder 5 through recovery pipe 4. Part of the condensate from the liquefied gaseous vinyl chloride in recovery pipe 4 is recovered to liquid sealing mechanism 402 through liquid seal pipe 401.

[0028] Meanwhile, the separated vinyl chloride resin particles enter the buffer tank 7. The control panel 6 controls the drive motor 901 to drive the conveying auger 9. The conveying auger 9 uses the discharge pipe 8 to transport the particles to the discharge tee 10. At this time, one set of solenoid valves 1101 is controlled to open the passage of one set of discharge tee 10 and the corresponding discharge pipe 11, thereby activating one set of slurry tank 1. The particles are recycled into the corresponding slurry tank 1 through the discharge pipe 11. The two sets of slurry tank 1 are used in a standby manner. Before use, the discharge tee 10 is switched to open the passage of the corresponding slurry tank 1.

[0029] Finally, the mother liquor is injected into the water tank 1201 through the inlet pipe 1202. The water pump 1204 is started using the control panel 6. The mother liquor in the water tank 1201 is pumped into the main flushing pipe 1203 by the water pump 1204. The electromagnetic water valve 1205 is controlled by the control panel 6 to open the two sets of flushing branch pipes 12. The mother liquor in the main flushing pipe 1203 is transported to the cyclone separator 3 and the buffer tank 7 through the flushing branch pipes 12, thereby fully flushing and recovering the residual polyvinyl chloride resin particles in the cyclone separator 3 and the buffer tank 7.

[0030] Through the above steps, the vinyl chloride resin obtained from the reaction is recovered by setting up a slurry tank 1. The residual vinyl chloride in the vinyl chloride resin is conveyed to the cyclone separator 3 by self-pressure through the air inlet pipe 2. The cyclone separator 3 performs gas-solid separation to prevent vinyl chloride resin particles from entering the recovery pipe 4. The separated gas is recovered to the gas holder 5 through the recovery pipe 4. The gaseous vinyl chloride in the recovery pipe 4 will liquefy some of the condensate. This condensate is recovered by the leak-proof component and the recovery pipe 4 is liquid-sealed to prevent vinyl chloride gas leakage. The separated vinyl chloride resin particles enter the buffer tank 7, and the feeding is controlled by the control panel 6. When the auger 9 operates, it conveys the granules through the discharge pipe 8 to the discharge tee 10. The discharge tee 10 then conveys the granules to the discharge pipe 11, thereby recovering the granules into the slurry tank 1. There are two sets of slurry tanks 1, one for standby and one for use. Before use, the discharge tee 10 is switched to open the corresponding passage of the slurry tank 1. The mother liquor water is injected into the cyclone separator 3 and the buffer tank 7 through the flushing branch pipe 12 for flushing treatment. The granules in the cyclone separator 3 and the buffer tank 7 are flushed into the slurry tank 1, thereby ensuring smooth vinyl chloride recovery, avoiding long-term accumulation and blockage of the device by vinyl chloride resin, preventing vinyl chloride spillage, and ensuring polymerization capacity.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A gas-solid separation anti-clogging device for polyvinyl chloride slurry recycling, comprising a slurry tank (1), characterized in that: It also includes an air inlet pipe (2), a cyclone separator (3), a recovery pipe (4), a leak-proof component, a gas tank (5), a control panel (6), a buffer tank (7), a discharge pipe (8), a conveying auger (9), a discharge tee (10), a discharge pipe (11), a flushing branch pipe (12), and a flushing component. The outer top of the slurry tank (1) is connected to the air inlet pipe (2), and the top of the air inlet pipe (2) is connected to the cyclone separator (3). The outer side of the top of the cyclone separator (3) is provided with a recovery pipe (4), and the outer side of the recovery pipe (4) is provided with a leak-proof component. A gas holder (5) is connected to the bottom of the gas holder (5). A control panel (6) is installed on the outside of the gas holder (5). A buffer tank (7) is connected to the bottom of the cyclone separator (3). A discharge pipe (8) is installed at the bottom of the buffer tank (7). A conveying auger (9) is installed on the inside of the discharge pipe (8). A discharge tee (10) is installed at one end of the discharge pipe (8). A discharge pipe (11) is connected to both ends of the discharge tee (10). A flushing branch pipe (12) is connected to the top outside of the cyclone separator (3) and the buffer tank (7). A flushing assembly is installed at one end of the flushing branch pipe (12).

2. The gas-solid separation anti-clogging device for polyvinyl chloride slurry recycling according to claim 1, characterized in that: Two sets of slurry tanks (1) are symmetrically arranged. The top end of the air inlet pipe (2) is connected to the air pipe of the cyclone separator (3) in a three-way manner, and the other end of the feed pipe (11) is connected to the slurry tank (1).

3. The gas-solid separation anti-clogging device for polyvinyl chloride slurry recycling according to claim 1, characterized in that: The flushing assembly includes a water tank (1201), an inlet pipe (1202), and a flushing main pipe (1203). The water tank (1201) is located on the outside of the buffer tank (7). The inlet pipe (1202) is connected through the top of the water tank (1201). The flushing main pipe (1203) is also connected through the top of the water tank (1201). One end of the flushing branch pipe (12) is connected through the flushing main pipe (1203).

4. The gas-solid separation anti-clogging device for polyvinyl chloride slurry recycling according to claim 3, characterized in that: The flushing assembly also includes a water pump (1204) and a solenoid water valve (1205). The water pump (1204) is installed on the outside of the main flushing pipe (1203), and the solenoid water valve (1205) is installed on the outside of the branch flushing pipe (12). The water pump (1204) and the solenoid water valve (1205) are electrically connected to the control panel (6).

5. The gas-solid separation anti-clogging device for polyvinyl chloride slurry recycling according to claim 1, characterized in that: The leak prevention component includes a liquid seal pipe (401) and a liquid seal mechanism (402). The liquid seal pipe (401) is connected to the bottom outer side of the recovery pipe (4), and the liquid seal mechanism (402) is provided at the bottom of the liquid seal pipe (401).

6. The gas-solid separation anti-clogging device for polyvinyl chloride slurry recycling according to claim 1, characterized in that: A drive motor (901) is installed at the top of the outer side of the discharge pipe (8), and a solenoid valve (1101) is installed on the outer side of the discharge pipe (11). The drive motor (901) and the solenoid valve (1101) are electrically connected to the control panel (6). The drive motor (901) drives the drive shaft of the conveying auger (9) to rotate.

7. The gas-solid separation anti-clogging device for polyvinyl chloride slurry recycling according to claim 1, characterized in that: A feed pipe (101) is connected to the top of the outer side of the slurry tank (1). A pressure pump (201) is installed on the outer side of the air inlet pipe (2). A check valve (202) is installed at the top of the air inlet pipe (2). The pressure pump (201) and the check valve (202) are electrically connected to the control panel (6).

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