CN205347294U - Cauldron device is scribbled to polymeric kettle - Google Patents

Abstract

<b>The utility model relates to the technical field of suspension polyvinyl chloride, which is a polymerization kettle coating device; it includes a polymerization kettle and a gas-liquid separator; an inlet port and a first circulation port are respectively arranged on the top of the polymerization kettle, The coating kettle pipeline is fixedly connected to the inlet end of the polymerization kettle, and the flushing water pipeline and the steam pipeline are respectively fixedly connected to the coating kettle pipeline; an inlet port is arranged on the upper part of the gas-liquid separator, and a There is an outlet. The utility model has a reasonable and compact structure and is easy to use. Through the cooperative use of the polymerization kettle, the gas-liquid separator, the vacuum pump, the first pipeline, the second pipeline, the first circulation pipeline and the second circulation pipeline, the uncoated coating after atomization The coating liquid on the inner wall of the polymerization kettle is recycled, avoiding the atomized coating liquid to the recovery system when vacuuming; it has the characteristics of safety, reliability and good coating effect, which greatly reduces the sticking phenomenon and prolongs the The cycle of cleaning the kettle is shortened, and the grade rate of PVC products is improved. </b>

Description

Polymerization tank coating device

technical field

The utility model relates to the technical field of suspension method polyvinyl chloride, which is a polymerization kettle coating device.

Background technique

During the production process of polyvinyl chloride by the suspension method, polymer bonding will occur on the wall of the polymerization kettle, the stirring shaft, the paddle and the internal cold baffle of the polymerization kettle, which is commonly called "sticky kettle". If the sticky kettle is not cleaned in time, the sticky kettle material will be mixed into the product to produce temporary or permanent "fish eyes", which will affect the product quality. At the same time, failure to clean up the sticky matter in time will also reduce the operation cycle of the polymerization kettle, resulting in a decline in production capacity. Therefore, preventing or reducing sticking is a problem that must be solved in the production of polyvinyl chloride.

Zhongtai Chemical Huatai Heavy Chemical Co., Ltd. PVC workshop 3# device 110m ³ During the production process of the polymerization kettle, the grade rate of the PVC resin quality fluctuated frequently. It was found that the "fish eye" index of the resin affected the reduction of the grade rate of the PVC product. The production of about 100 kettles required cleaning of the kettle. During the reactor, it was found that the stirring shaft of the polymerization kettle and the bottom of the internal cooling pipe were seriously suspended. The reason for the analysis was that the vacuum pump was used to atomize the negative pressure in the polymerization kettle during the process of adding the coating solution in the kettle coating process. However, due to various reasons , the coating solution after atomization can not be evenly distributed to the inner wall of the polymerization kettle and the surface of the internal cooling pipe in the kettle and the surface of the stirring blade, resulting in a poor coating effect.

Contents of the invention

The utility model provides a coating device for a polymerization kettle, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that the coating effect of the existing kettle coating device is not good, and it is easy to produce temporary or permanent "fish eyes". The grade rate of PVC products is reduced and the cleaning period is short.

The technical scheme of the utility model is realized through the following measures: a polymerization kettle coating device, including a polymerization kettle and a gas-liquid separator; The inlet end of the gas-liquid separator is fixedly connected with the pipeline of the coating kettle, and the pipeline of the coating kettle is fixedly connected with the flushing water pipeline and the steam pipeline respectively. The upper part of the gas-liquid separator is provided with an inlet port, and the top of the gas-liquid separator is provided with an outlet port. , a recovery pipeline is fixedly connected to the outlet end of the gas-liquid separator, the first circulation port of the polymerization kettle and the inlet end of the gas-liquid separator are fixedly connected together through the first pipeline, and a vacuum pump is fixedly installed on the first pipeline; The bottom of the polymerization kettle is provided with a second circulation port, and the second circulation port of the polymerization kettle is fixedly connected with a second pipeline, and the second pipeline is fixedly connected with the first pipeline between the vacuum pump and the polymerization kettle. A first circulation pipeline is fixedly connected between the recovery pipeline and the second pipeline, a second circulation pipeline is fixedly connected on the first circulation pipeline, and the second circulation pipeline is fixedly connected with the first pipeline between the second pipeline and the polymerization kettle. Together, a valve is fixedly installed on the first pipeline between the second pipeline and the second circulation pipeline, and the coating kettle pipeline, flushing water pipeline, steam pipeline, recovery pipeline, first pipeline, second pipeline, and first circulation pipeline Valves are fixedly installed on the second circulation pipeline and the second pipeline, and a three-way shut-off valve is fixedly installed on the second pipeline close to the polymerization kettle. A sewage pipe is fixedly connected to the three-way shut-off valve, and a valve is fixedly installed on the sewage pipe.

Below is the further optimization or/and improvement to above-mentioned utility model technical scheme:

There is a heat exchanger on the outside of the gas-liquid separator, and a liquid outlet is provided at the bottom of the gas-liquid separator. The liquid outlet of the gas-liquid separator and the inlet end of the heat exchanger are fixedly connected together through a third pipeline. The outlet end of the heat exchanger and the inlet end of the vacuum pump are fixedly connected together through a fourth pipeline, a pump and a valve are fixedly installed on the third pipeline, and a valve is fixedly installed on the fourth pipeline.

The above-mentioned third pipeline is fixedly connected with a recovery water pipeline, a solenoid valve is fixedly installed on the recovery water pipeline, a PLC is installed outside the gas-liquid separator, and a liquid level transmitter is fixedly installed on the gas-liquid separator. The signal output end of the bit transmitter and the signal input end of the PLC are electrically connected together through wires, and the signal output end of the PLC and the signal input end of the solenoid valve are electrically connected together through wires.

A cooling water pipe is fixedly connected to the cooling water inlet of the heat exchanger, a cooling water return pipe is fixedly connected to the cooling water outlet of the heat exchanger, and valves are fixedly installed on the cooling water pipe and the cooling water return pipe respectively.

Filters are respectively fixedly installed on the first pipeline and the third pipeline.

The above-mentioned pressure gauges are fixedly installed on the first pipeline and the second pipeline respectively; or/and, the organic seal water pipe is fixedly connected to the mechanical seal water inlet end of the vacuum pump, and the organic seal return pipe is fixedly connected to the mechanical seal water outlet end of the vacuum pump. The water pipes are respectively fixed with valves on the machine seal upper water pipe and the machine seal return water pipe.

The utility model has a reasonable and compact structure and is easy to use. Through the cooperative use of the polymerization kettle, the gas-liquid separator, the vacuum pump, the first pipeline, the second pipeline, the first circulation pipeline and the second circulation pipeline, the uncoated coating after atomization The coating liquid on the inner wall of the polymerization kettle is recycled, avoiding the atomized coating liquid to the recovery system when vacuuming; it has the characteristics of safety, reliability and good coating effect, which greatly reduces the sticking phenomenon and prolongs the The cycle of cleaning the kettle is shortened, and the grade rate of PVC products is improved.

Description of drawings

Accompanying drawing 1 is the schematic diagram of the partial perspective structure of the front view of the best embodiment of the utility model.

The codes in the accompanying drawings are: 1 is the polymerization tank, 2 is the gas-liquid separator, 3 is the coating pipeline, 4 is the flushing water pipeline, 5 is the steam pipeline, 6 is the recovery pipeline, 7 is the first pipeline, and 8 is the Vacuum pump, 9 is the second pipeline, 10 is the first circulation pipeline, 11 is the second circulation pipeline, 12 is the valve, 13 is the three-way shut-off valve, 14 is the sewage pipe, 15 is the heat exchanger, 16 is the third pipeline, 17 is the fourth pipeline, 18 is the pump, 19 is the recovery water pipeline, 20 is the solenoid valve, 21 is the liquid level transmitter, 22 is the cooling water supply pipe, 23 is the cooling return water pipe, 24 is the filter, 25 is the pressure gauge , 26 is the machine seal upper water pipe, 27 is the machine seal return water pipe, 28 is the stirring shaft, and 29 is the internal cooling pipe.

detailed description

The utility model is not limited by the following examples, and the specific implementation manner can be determined according to the technical scheme of the utility model and actual conditions.

In this utility model, for the convenience of description, the description of the relative positional relationship of each component is described according to the layout method of Fig. The relationship is determined according to the layout direction of Figure 1 of the specification.

Below in conjunction with embodiment and accompanying drawing, the utility model is further described:

As shown in accompanying drawing 1, this polymerizer coating tank device comprises polymerizer 1 and gas-liquid separator 2; The top of polymerizer 1 is respectively provided with inlet end and the first circulation mouth end, is fixed on the inlet end of polymerizer 1 It is connected with the coating kettle pipeline 3, and the flushing water pipeline 4 and the steam pipeline 5 are respectively fixedly connected to the coating kettle pipeline 3. An inlet port is arranged on the upper part of the gas-liquid separator 2, and an outlet port is arranged on the top of the gas-liquid separator 2. End, on the outlet end of the gas-liquid separator 2 is fixedly connected with a recovery pipeline 6, the first circulation port end of the polymerizer 1 and the inlet end of the gas-liquid separator 2 are fixedly connected together through the first pipeline 7, in the first pipeline 7 is fixedly installed with a vacuum pump 8; the bottom of the polymerization kettle 1 is provided with a second circulation port, and the second circulation port of the polymerization kettle 1 is fixedly connected with a second pipeline 9, and the second pipeline 9 is connected with the vacuum pump 8 and the polymerization The first pipeline 7 between the kettles 1 is fixedly connected together, a first circulation pipeline 10 is fixedly connected between the recovery pipeline 6 and the second pipeline 9, and a second circulation pipeline 11 is fixedly connected on the first circulation pipeline 10, The second circulation pipeline 11 is fixedly connected with the first pipeline 7 between the second pipeline 9 and the polymerizer 1, and a valve 12 is fixedly installed on the first pipeline 7 between the second pipeline 9 and the second circulation pipeline 11 , Valves 12 are fixedly installed on the coating kettle pipeline 3, the flushing water pipeline 4, the steam pipeline 5, the recovery pipeline 6, the first pipeline 7, the second pipeline 9, the first circulation pipeline 10 and the second circulation pipeline 11, close to A three-way shut-off valve 13 is fixedly installed on the second pipeline 9 of the polymerization kettle 1 , a sewage discharge pipe 14 is fixedly connected to the three-way shut-off valve 13 , and a valve 12 is fixedly installed on the sewage discharge pipe 14 . The valve 12 on the coating kettle pipeline 3, the flushing water pipeline 4, the steam pipeline 5, the recovery pipeline 6, the first pipeline 7, the second pipeline 9, the first circulation pipeline 10, the second circulation pipeline 11 and the sewage pipe 14 can be electromagnetic Valve 20 can be automatically controlled; polymerization kettle 1, gas-liquid separator 2 and vacuum pump 8 are all prior art; through polymerization kettle 1, gas-liquid separator 2, vacuum pump 8, first pipeline 7, second pipeline 9, the A circulation line 10 and a second circulation line 11 enable recycling of the coating solution that is not coated on the inner wall of the polymerization kettle 1 after atomization, avoiding pumping the atomized coating solution to the recovery system when vacuuming; When coating the kettle, the stirring shaft 28 in the polymerization kettle 1 and the bottom of the internal cooling pipe 29 are dead corners for the distribution of the coating liquid. When the bottom of the kettle is vacuumed, the recovered gas flows back to the top of the polymerization kettle 1; The gas is returned to the bottom of the polymerization kettle 1, so that the coating solution that is not coated on the inner wall of the polymerization kettle 1 after atomization can be recycled, and the sticking phenomenon of the inner wall of the polymerization kettle 1, the stirring shaft 28 and the inner cooling pipe 29 is greatly reduced , The cleaning cycle has been extended from the previous 100 kettles to more than 300 kettles, prolonging the cleaning cycle; at the same time, the grade rate of PVC products has been improved to ensure product quality.

According to actual needs, the above-mentioned polymerization tank coating tank device can be further optimized or/and improved:

As shown in accompanying drawing 1, a heat exchanger 15 is arranged on the outside of the gas-liquid separator 2, and a liquid outlet is provided at the bottom of the gas-liquid separator 2, and the liquid outlet of the gas-liquid separator 2 and the outlet of the heat exchanger 15 The inlet end is fixedly connected together through the third pipeline 16, the outlet end of the heat exchanger 15 and the inlet end of the vacuum pump 8 are fixedly connected together through the fourth pipeline 17, and a pump 18 and a valve 12 are respectively fixedly installed on the third pipeline 16 , a valve 12 is fixedly installed on the fourth pipeline 17 . In this way, the liquid phase separated by the gas-liquid separator 2 enters the heat exchanger 15 for cooling, and the cooled liquid phase then enters the vacuum pump 8 to cool the material in the vacuum pump 8. After cooling, the material in the vacuum pump 8 is cooled. The liquid enters the gas-liquid separator 2 together for vapor-liquid separation.

As shown in accompanying drawing 1, on the 3rd pipeline 16, be fixedly connected with recovery water pipeline 19, on recovery water pipeline 19, electromagnetic valve 20 is fixedly installed, there is PLC on the outside of gas-liquid separator 2, in gas-liquid separator 2 is fixedly installed with a liquid level transmitter 21, the signal output end of the liquid level transmitter 21 and the signal input end of the PLC are electrically connected together through wires, and the signal output end of the PLC and the signal input end of the solenoid valve 20 are connected through wires electrically connected together. In this way, according to the level of the liquid in the gas-liquid separator 2 , the liquid phase separated from the gas-liquid separator 2 can be recovered and processed through the recovery water pipeline 19 .

As shown in accompanying drawing 1, on the cooling water inlet end of heat exchanger 15, be fixedly connected with cooling upper water pipe 22, on the cooling water outlet end of heat exchanger 15, be fixedly connected with cooling water return pipe 23, on cooling upper water pipe 22 Valves 12 are fixedly installed on the cooling and return water pipes 23 respectively. In this way, cold water is passed into the upper cooling water pipe 22 to facilitate the heat exchange of the liquid phase entering the heat exchanger 15 .

As shown in FIG. 1 , filters 24 are fixedly installed on the first pipeline 7 and the third pipeline 16 respectively. In this way, the filter 24 facilitates filtering impurities in the materials in the first pipeline 7 and the third pipeline 16 .

As shown in accompanying drawing 1, a pressure gauge 25 is fixedly installed on the first pipeline 7 and the second pipeline 9 respectively; 8 is fixedly connected with an organic seal water return pipe 27 on the machine seal water outlet end, and a valve 12 is fixedly installed on the machine seal upper water pipe 26 and the machine seal return water pipe 27 respectively.

The above technical features constitute the best embodiment of the utility model, which has strong adaptability and best implementation effect, and non-essential technical features can be increased or decreased according to actual needs to meet the needs of different situations.

The use process of the best embodiment of the present utility model: when coating the kettle, (1) first pass water into the polymerization kettle 1 through the flushing water pipeline 4 for cleaning, and then drain the polymerization kettle 1 through the sewage pipe 14 after cleaning;

(2) After the drainage is completed, start the vacuum pump 8 to carry out the vacuuming operation at the bottom of the kettle. After the vacuuming operation, pass steam into the polymerization kettle 1 through the steam pipeline 5, and at the same time add the coating kettle liquid to the formula value through the coating kettle pipeline 3, to be set Stop passing steam in polymerization kettle 1 after time;

(3) Then vacuumize the bottom of the polymerization kettle 1 by timing. When the bottom of the kettle is evacuated, the coating solution that is atomized in the polymerization kettle 1 and not coated on the inner wall of the polymerization kettle 1 passes through the second pipeline 9, the first pipeline 7 and The vacuum pump 8 enters the gas-liquid separator 2 for gas-liquid separation, and the separated gas phase enters the polymerization kettle 1 through the second circulation line 11 and the first pipeline 7 from the first circulation port at the top of the polymerization kettle 1 to circulate the coating kettle; polymerization Vacuumize the bottom of kettle 1 to the set time and then switch to vacuumize the top of the kettle. When the top of the kettle is vacuumed, the coating liquid in the polymerization kettle 1 that is atomized and not coated on the inner wall of the polymerization kettle 1 passes through the first pipeline 7 and the vacuum pump 8 enters the gas-liquid separator 2 for gas-liquid separation, and the separated gas phase enters the polymerization kettle 1 through the first circulation line 10 and the second pipeline 9 from the second circulation port at the bottom of the polymerization kettle 1 to circulate the coating kettle, and the top of the kettle Vacuumize until the set time to finish coating the kettle, and the tail gas after the coating is completed is discharged to the recovery system through the recovery pipeline 6. During the whole coating process, the polymerization kettle 1 starts the stirring shaft 28 for high-speed stirring.

Claims (10)

1. A polymerization kettle coating kettle device is characterized in that it comprises a polymerization kettle and a gas-liquid separator; an inlet port and a first circulation port are respectively arranged on the top of the polymerization kettle, and a coating kettle is fixedly connected on the inlet end of the polymerization kettle Pipelines, flushing water pipelines and steam pipelines are fixedly connected to the coating kettle pipelines, an inlet port is arranged on the upper part of the gas-liquid separator, an outlet port is arranged on the top of the gas-liquid separator, and an outlet port of the gas-liquid separator A recovery pipeline is fixedly connected to the top, the first circulation port of the polymerization kettle and the inlet end of the gas-liquid separator are fixedly connected together through the first pipeline, and a vacuum pump is fixedly installed on the first pipeline; a second The circulation port end is fixedly connected with the second pipeline on the second circulation port end of the polymerization kettle, and the second pipeline is fixedly connected with the first pipeline between the vacuum pump and the polymerization kettle, and is fixed between the recovery pipeline and the second pipeline. A first circulation line is connected, a second circulation line is fixedly connected on the first circulation line, the second circulation line is fixedly connected with the first line between the second line and the polymerizer, and the second line and the second Valves are fixedly installed on the first pipeline between the circulation pipelines, and are fixedly installed on the kettle coating pipeline, flushing water pipeline, steam pipeline, recovery pipeline, first pipeline, second pipeline, first circulation pipeline and second circulation pipeline respectively There is a valve, a three-way shut-off valve is fixedly installed on the second pipeline close to the polymerization kettle, a sewage discharge pipe is fixedly connected to the three-way shut-off valve, and a valve is fixedly installed on the sewage discharge pipe. 2. The polymerization kettle coating kettle device according to claim 1, wherein a heat exchanger is arranged on the outside of the gas-liquid separator, and a liquid outlet is provided at the bottom of the gas-liquid separator, and the liquid outlet of the gas-liquid separator The inlet end of the heat exchanger is fixedly connected through the third pipeline, the outlet end of the heat exchanger and the inlet end of the vacuum pump are fixedly connected together through the fourth pipeline, and a pump and a valve are fixedly installed on the third pipeline, respectively. A valve is fixedly installed on the fourth pipeline. 3. The polymerization kettle coating kettle device according to claim 2, characterized in that the third pipeline is fixedly connected with a recovery water pipeline, a solenoid valve is fixedly installed on the recovery water pipeline, and a PLC is arranged on the outside of the gas-liquid separator. A liquid level transmitter is fixedly installed on the gas-liquid separator, and the signal output end of the liquid level transmitter and the signal input end of the PLC are electrically connected together through wires, and the signal output end of the PLC and the signal input end of the solenoid valve are connected through The wires are electrically connected together. 4. The polymerization kettle coating device according to claim 2 or 3, characterized in that the cooling water inlet end of the heat exchanger is fixedly connected with a cooling upper water pipe, and the cooling water outlet end of the heat exchanger is fixedly connected with a cooling water pipe. The water return pipe is respectively fixed with valves on the cooling upper water pipe and the cooling water return pipe. 5. The polymerization tank coating tank device according to claim 2 or 3, characterized in that filters are fixedly installed on the first pipeline and the third pipeline respectively. 6. The polymerization tank coating tank device according to claim 4, characterized in that filters are fixedly installed on the first pipeline and the third pipeline respectively. 7. according to claim 1 or 2 or 3 described polymerization kettle coating kettle device, it is characterized in that pressure gauge is fixedly installed respectively on the first pipeline and the second pipeline; Or/and, on the machine seal water inlet end of vacuum pump The organic seal upper water pipe is fixedly connected, the organic seal return water pipe is fixedly connected to the mechanical seal water outlet of the vacuum pump, and valves are fixedly installed on the mechanical seal upper water pipe and the mechanical seal return water pipe respectively. 8. The polymerization tank coating tank device according to claim 4, characterized in that a pressure gauge is fixedly installed on the first pipeline and the second pipeline respectively; The upper water pipe is fixedly connected to the organic seal return water pipe on the mechanical seal water outlet end of the vacuum pump, and valves are fixedly installed on the mechanical seal upper water pipe and the mechanical seal return water pipe respectively. 9. The polymerization tank coating tank device according to claim 5, characterized in that a pressure gauge is fixedly installed on the first pipeline and the second pipeline respectively; The upper water pipe is fixedly connected to the organic seal return water pipe on the mechanical seal water outlet end of the vacuum pump, and valves are fixedly installed on the mechanical seal upper water pipe and the mechanical seal return water pipe respectively. 10. The polymerization tank coating tank device according to claim 6, characterized in that a pressure gauge is fixedly installed on the first pipeline and the second pipeline respectively; The upper water pipe is fixedly connected to the organic seal return water pipe on the mechanical seal water outlet end of the vacuum pump, and valves are fixedly installed on the mechanical seal upper water pipe and the mechanical seal return water pipe respectively.