CN216044256U - Polymerization device driving vacuum-pumping system - Google Patents

Abstract

The utility model discloses a polymerization device start-up vacuum pumping system, which comprises a vacuum jet separator, a water ring vacuum pump, a separation tank, a filter and a cooler, wherein vacuum ports of a polymerization kettle, a polymerization kettle discharge chute, a stripping feed chute, a stripping tower, a slurry chute, a monomer recovery separator, a fresh monomer chute and a recovered monomer chute of the polymerization device are communicated with an inlet pipeline of the vacuum jet separator. The advantages are that: this application uses water ring vacuum pump to come the evacuation, at the continuous operation in-process of pump, is constantly breathing in, compression, exhaust process, and it is even steady to bleed in succession and bleed, exhausts through the evacuation emission behind gas-liquid separation, and the knockout drum has also played the cushioning effect, and it is even to exhaust, and the exhaust noise is little. And the separated water can be recycled by the water ring vacuum pump, so that the cost is low.

Description

Polymerization device driving vacuum-pumping system

The technical field is as follows:

the utility model relates to the technical field of polymerization devices, in particular to a driving and vacuum-pumping system of a polymerization device.

Background art:

the polymerization device comprises a polymerization unit, a discharge unit, a stripping unit and a monomer recovery unit, wherein slurry discharged from the polymerization unit is sent to the discharge unit, then sent to the stripping unit for stripping and then sent to be dried; the gas discharged from the polymerization kettle of the polymerization unit passes through the monomer recovery unit, the gas discharged from the stripping unit is also sent to the monomer recovery unit by the continuous recovery compressor, and the monomer in the gas is recycled by the monomer recovery unit. After the polymerization device is stopped and overhauled, a large amount of air exists in a fresh monomer groove of the polymerization unit, a discharge groove of the polymerization kettle of the discharge unit, a stripping tower of the stripping unit, a slurry groove and a monomer recovery groove of the monomer recovery unit, and because the polymerization production is closed production, the system is required to be isolated from the air and cannot have the air, the air in each container and an auxiliary pipeline is pumped out and discharged through a water ring vacuum pump before the system is started, and finally, the vacuum is broken through vinyl chloride gas, so that the system starting condition is achieved. The steam vacuum ejector is adopted at present, and the principle of the steam vacuum ejector is that 7 kilograms of steam is introduced to pass through a nozzle to form high-speed jet flow, gas in a polymerization kettle, a slurry tank and other containers is pumped out to reach the vacuum degree required by the process, and the gas in the containers and the steam are discharged into the atmosphere through emptying. However, in the process of vacuumizing by the steam vacuum ejector, the flow rate of steam emptying is high, so that great steam noise is generated, steam is used in the whole process, the fluctuation of the steam pressure has great influence on the vacuumizing efficiency, and the steam consumption is large due to long time.

The utility model has the following contents:

the utility model aims to provide a polymerization device driving vacuum-pumping system with low noise.

The utility model is implemented by the following technical scheme: the startup vacuum pumping system of the polymerization device comprises a vacuum jet separator, a water ring vacuum pump, a separation tank, a filter and a cooler, wherein vacuum ports of a polymerization kettle, a polymerization kettle discharge chute, a stripping feed chute, a stripping tower, a slurry chute, a monomer recovery separator, a fresh monomer chute and a recovered monomer chute of the polymerization device are communicated with an inlet pipeline of the vacuum jet separator, an outlet of the vacuum jet separator is communicated with an inlet of the water ring vacuum pump through a startup vacuum pipe, and a startup control valve is installed on the startup vacuum pipe; the outlet of the water ring vacuum pump is communicated with the inlet pipeline of the separation tank, and the air outlet of the separation tank is communicated with an emptying pipe; the liquid outlet of the separation tank is communicated with the inlet pipeline of the filter, the outlet of the filter is communicated with the inlet pipeline of the cooler, and the outlet of the cooler is communicated with a cooling water pipe.

Furthermore, the outlet of the cooling water pipe is communicated with a water inlet pipeline of the water ring vacuum pump, a water supplementing pipe is communicated with the separating tank, and a water supplementing control valve is installed on the water supplementing pipe.

Furthermore, water replenishing stop valves are respectively arranged on the water replenishing pipes at the two ends of the water replenishing control valve, the water replenishing pipe between the inlet end of the water replenishing pipe and the water replenishing stop valve adjacent to the inlet end of the water replenishing pipe is communicated with the separating tank through a bypass pipe, and a bypass control valve is arranged on the bypass pipe.

Furthermore, the starting vacuum pipe on the outlet side of the starting control valve is communicated with the emptying pipe through an adjusting pipe, and the adjusting pipe is provided with an adjusting valve.

Furthermore, the regulating valve is a pressure switch, a pressure transmitter is arranged on the driving vacuum pipe between the regulating pipe and the driving control valve, and the pressure transmitter is interlocked with the pressure switch.

Furthermore, the filter comprises two filters arranged in parallel, and a filtering stop valve is arranged at the inlet and the outlet of each filter.

Furthermore, a steam pipe is communicated with the side part of the vacuum jet separator, and a steam control valve is installed on the steam pipe.

The utility model has the advantages that: this application uses water ring vacuum pump to come the evacuation, at the continuous operation in-process of pump, is constantly breathing in, compression, exhaust process, and it is even steady to bleed in succession and bleed, exhausts through the evacuation emission behind gas-liquid separation, and the knockout drum has also played the cushioning effect, and it is even to exhaust, and the exhaust noise is little. And the separated water can be recycled by the water ring vacuum pump, so that the cost is low.

Description of the drawings:

fig. 1 is a schematic view of the overall structure of the present invention.

The system comprises a vacuum jet separator 1, a water ring vacuum pump 2, a separation tank 3, a filter 4, a cooler 5, a polymerization device 6, a polymerizer discharge tank 61, a stripping feed tank 62, a stripping tower 63, a slurry tank 64, a monomer recovery separator 65, a fresh monomer tank 66, a recovered monomer tank 67, a polymerizer 68, a start vacuum pipe 7, a start control valve 8, an emptying pipe 9, a cooling water pipe 10, a water replenishing pipe 11, a water replenishing control valve 12, a water replenishing stop valve 13, a bypass pipe 14, a bypass control valve 15, an adjusting pipe 16, an adjusting valve 17, a pressure transmitter 18, a filtering stop valve 19, a steam pipe 20 and a steam control valve 21.

The specific implementation mode is as follows:

in the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1, the startup vacuum pumping system of the polymerization device comprises a vacuum jet separator 1, a water ring vacuum pump 2, a separation tank 3, a filter 4 and a cooler 5, wherein vacuum ports of a polymerizer 68, a polymerizer discharge chute 61, a stripping feed chute 62, a stripping tower 63, a slurry chute 64, a monomer recovery separator 65, a fresh monomer chute 66 and a recovered monomer chute 67 of the polymerization device 6 are all communicated with an inlet pipeline of the vacuum jet separator 1, an outlet of the vacuum jet separator 1 is communicated with an inlet of the water ring vacuum pump 2 through a startup vacuum pipe 7, and a startup control valve 8 is installed on the startup vacuum pipe 7; the outlet of the water ring vacuum pump 2 is communicated with the inlet pipeline of the separating tank 3; preferably, it comprises two filters 4 arranged in parallel, a filtering shut-off valve 19 being mounted on the inlet and outlet of each filter 4, the two filters 4 being mutually ready for use by switching the filtering shut-off valves 19. An air outlet of the separation tank 3 is communicated with an emptying pipe 9; the liquid outlet of the separating tank 3 is communicated with the inlet pipeline of the filter 4, the outlet of the filter 4 is communicated with the inlet pipeline of the cooler 5, and the outlet of the cooler 5 is communicated with the cooling water pipe 10. The vacuumizing process is that the water ring vacuum pump 2 is started, under the suction action of the water ring vacuum pump 2, the gas in the polymerizer 68, the polymerizer discharge chute 61, the steam stripping feed chute 62, the steam stripping tower 63, the slurry chute 64, the monomer recovery separator 65, the fresh monomer chute 66 and the recovered monomer chute 67 enters the vacuum jet separator 1 for primary separation, the separated condensed water is discharged from the bottom of the vacuum jet separator 1, the gas reaches the separation tank 3 through the start vacuum tube 7 and the water ring vacuum pump 2 upwards for gas-liquid separation, and the separated gas is evacuated upwards through the evacuation tube 9; the separated liquid is sent to a filter 4 to remove impurities and then enters a cooler 5 for cooling. The starting vacuum pipe 7 at the outlet side of the starting control valve 8 is communicated with the emptying pipe 9 through an adjusting pipe 16, and the adjusting pipe 16 is provided with an adjusting valve 17; the regulating valve 17 is a pressure switch, a pressure transmitter 18 is arranged on the driving vacuum tube 7 between the regulating tube 16 and the driving control valve 8, the pressure transmitter 18 and the pressure switch are interlocked in a general connection mode, and when the pressure transmitter 18 monitors that the pressure in the driving vacuum tube 7 is lower than a system set value, the regulating valve 17 is controlled to be opened, so that part of gas discharged by the emptying tube 9 flows back to ensure the stability of the system pressure; when the pressure transmitter 18 monitors that the pressure in the driving vacuum tube 7 reaches the set value of the system, the control regulating valve 17 is closed.

A steam pipe 20 is communicated with the side part of the vacuum jet separator 1, and a steam control valve 21 is arranged on the steam pipe 20; after the primary vacuumizing is finished, a steam control valve 21 is opened, steam is sent into the vacuum jet separator 1 through a steam pipe 20, the vacuumizing process is repeated after the vacuum is broken, secondary vacuumizing is carried out, and the vacuumizing is repeated for 2-3 times to ensure that air in the equipment is completely removed.

Preferably, the outlet of the cooling water pipe 10 is communicated with the inlet pipeline of the water ring vacuum pump, the separation tank 3 is communicated with a water supplementing pipe 11, the water supplementing pipe 11 is provided with a water supplementing control valve 12, and the cooling water discharged by the cooler 5 is used for supplying water for the water ring vacuum pump, so that the energy is recycled, and the energy consumption of the system is reduced. Water replenishing stop valves 13 are respectively arranged on water replenishing pipes 11 at two ends of the water replenishing control valve 12, the water replenishing pipe 11 between the inlet end of the water replenishing pipe 11 and the water replenishing stop valve 13 adjacent to the inlet end is communicated with the separating tank 3 through a bypass pipe 14, and a bypass control valve 15 is arranged on the bypass pipe 14; the water supplementing control valve 12 is opened to supplement water into the separation tank 3 through the water supplementing pipe 11 so as to meet the water demand of the water ring vacuum pump; when the water replenishment control valve 12 fails, the water replenishment shut-off valve 13 is closed, the bypass control valve 15 is opened, and water is introduced into the separation tank 3 through the bypass pipe 14.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. The startup vacuum pumping system of the polymerization device is characterized by comprising a vacuum jet separator, a water ring vacuum pump, a separation tank, a filter and a cooler, wherein vacuum ports of a polymerization kettle, a polymerization kettle discharge chute, a stripping feed chute, a stripping tower, a slurry chute, a monomer recovery separator, a fresh monomer chute and a recovered monomer chute of the polymerization device are all communicated with an inlet pipeline of the vacuum jet separator, an outlet of the vacuum jet separator is communicated with an inlet of the water ring vacuum pump through a startup vacuum pipe, and a startup control valve is installed on the startup vacuum pipe; the outlet of the water ring vacuum pump is communicated with the inlet pipeline of the separation tank, and the air outlet of the separation tank is communicated with an emptying pipe; the liquid outlet of the separation tank is communicated with the inlet pipeline of the filter, the outlet of the filter is communicated with the inlet pipeline of the cooler, and the outlet of the cooler is communicated with a cooling water pipe.

2. The polymerization device start-up vacuum pumping system according to claim 1, wherein the outlet of the cooling water pipe is communicated with the water inlet pipeline of the water ring vacuum pump, a water replenishing pipe is communicated with the separation tank, and a water replenishing control valve is installed on the water replenishing pipe.

3. The polymerization apparatus start-up vacuum pumping system according to claim 2, wherein a water replenishment shut-off valve is installed on each of the water replenishment pipes at both ends of the water replenishment control valve, the water replenishment pipe between the inlet end of the water replenishment pipe and the water replenishment shut-off valve adjacent thereto is communicated with the separation tank through a bypass pipe, and a bypass control valve is installed on the bypass pipe.

4. The polymerization apparatus start-up vacuum pumping system according to any one of claims 1 to 3, wherein the start-up vacuum pipe on the outlet side of the start-up control valve is communicated with the evacuation pipe through a regulating pipe, and a regulating valve is installed on the regulating pipe.

5. The polymerization device start-up vacuum pumping system according to claim 4, wherein the regulating valve is a pressure switch, and a pressure transmitter is mounted on the start-up vacuum pipe between the regulating pipe and the start-up control valve, and the pressure transmitter is interlocked with the pressure switch.

6. The polymerization plant start-up vacuum pumping system according to claim 1, 2, 3 or 5, which comprises two filters arranged in parallel, wherein a filtering stop valve is installed on the inlet and the outlet of each filter.

7. The polymerization device start-up vacuum pumping system according to claim 4, comprising two filters arranged in parallel, wherein a filtering stop valve is installed on an inlet and an outlet of each filter.

8. The polymerization plant startup vacuum pumping system according to claim 1, 2, 3, 5 or 7, wherein a steam pipe is communicated with a side portion of the vacuum jet separator, and a steam control valve is mounted on the steam pipe.

9. The system according to claim 4, wherein a steam pipe is connected to a side of the vacuum ejector separator, and a steam control valve is installed on the steam pipe.

10. The system according to claim 6, wherein a steam pipe is connected to a side of the vacuum ejector separator, and a steam control valve is installed on the steam pipe.

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