CN215927699U - Polymerization plant parking vacuum pumping system - Google Patents
Polymerization plant parking vacuum pumping system Download PDFInfo
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- CN215927699U CN215927699U CN202121944847.7U CN202121944847U CN215927699U CN 215927699 U CN215927699 U CN 215927699U CN 202121944847 U CN202121944847 U CN 202121944847U CN 215927699 U CN215927699 U CN 215927699U
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Abstract
The utility model discloses a parking vacuum-pumping system of a polymerization device, which comprises a vacuum jet separator, a water ring vacuum pump, a separating 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: use water ring vacuum pump to come the evacuation in this application, in the continuous operation in-process of pump, constantly breathing in, compression, exhaust process, it is even steady to bleed in succession and bleed, exhausts through 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 in the initial stage of vacuumizing, the chloroethylene gas in the system can be pumped to the monomer recovery unit, so that the chloroethylene gas can be prevented from being discharged outwards to pollute the environment, and the chloroethylene monomer can be recycled, so that the utilization rate is improved.
Description
The technical field is as follows:
the utility model relates to the technical field of polymerization devices, in particular to a parking 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. Wherein, when the polymerization facility need to park and overhaul, at the polymeric kettle and the fresh monomer groove of polymerization unit, the polymeric kettle discharge chute of discharge unit, the strip feed chute of strip unit, the stripper, the thick liquids groove, and can have the chloroethylene gas of certain concentration in the monomer recovery tank of monomer recovery unit, when parking is overhauld, need reach the maintenance condition that this part chloroethylene gas discharge can get into, the mode that adopts the evacuation usually takes out the chloroethylene gas in container and the accessory pipeline, reach the vacuum degree of technological requirement after, lead to steam and the broken vacuum of air, reach the condition that possesses the maintainer and get into: VC is less than 10 ppm. 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 parking vacuum-pumping system with low noise.
The utility model is implemented by the following technical scheme: the polymerization device parking vacuum-pumping system 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 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 parking vacuum tube, and a parking control valve is installed on the parking vacuum tube; a nitrogen pipe is communicated with the parking vacuum pipe on the outlet side of the parking control valve, and a nitrogen control valve is installed on the nitrogen pipe; the outlet of the water ring vacuum pump is communicated with the inlet pipeline of the separation tank, the gas outlet of the separation tank is communicated with a recovery pipe and an emptying pipe, the outlet end of the recovery pipe is communicated with the inlet of a continuous recovery compressor of the polymerization device, and the recovery pipe and the emptying pipe are respectively provided with a recovery control valve and an emptying control valve; the liquid outlet of the separation tank is communicated with an inlet pipeline of the filter, a filtering control valve is communicated with a pipeline between the separation tank and the filter, the outlet of the filter is communicated with an 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, a liquid level meter is arranged on the separation tank, a discharge pipe is communicated with a pipeline on the outlet side of the filtering control valve, a discharge control valve is installed on the discharge pipe, and the liquid level meter is respectively interlocked with the water supplementing control valve and the discharge control valve.
Furthermore, the device also comprises a booster pump, wherein the inlet of the booster pump is communicated with a liquid outlet pipeline of the separation tank, the outlet of the booster pump is communicated with the inlet pipeline of the filter, and the pipelines at the inlet and the outlet sides of the booster pump are respectively provided with a pressure control valve.
Furthermore, a return pipe is communicated between the recovery pipe at the inlet end of the recovery control valve and the parking vacuum pipe between the nitrogen pipe and the water ring vacuum pump, and a return control valve is installed on the return pipe.
Furthermore, the backflow control valve is a pressure switch, a pressure transmitter is installed on the parking vacuum tube between the backflow pipe and the water ring vacuum pump, and the pressure transmitter and the pressure switch are interlocked.
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: use water ring vacuum pump to come the evacuation in this application, in the continuous operation in-process of pump, constantly breathing in, compression, exhaust process, it is even steady to bleed in succession and bleed, exhausts through 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 in the initial stage of vacuumizing, the chloroethylene gas in the system can be pumped to the monomer recovery unit, so that the chloroethylene gas can be prevented from being discharged outwards to pollute the environment, and the chloroethylene monomer can be recycled, so that the utilization rate is improved. The water separated by the separating tank can be recycled by the water ring vacuum pump, and the cost is low.
Description of the drawings:
fig. 1 is a schematic view of the overall structure of the present invention.
A vacuum jet separator 1, a water ring vacuum pump 2, a separation tank 3, a filter 4, a cooler 5, a polymerization apparatus 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 continuous recovery compressor 68, a polymerizer 69, a parking vacuum pipe 7, a parking control valve 8, a nitrogen gas pipe 9, a nitrogen gas control valve 10, a recovery pipe 11, an evacuation pipe 12, a recovery control valve 13, an evacuation control valve 14, a filtration control valve 15, a cooling water pipe 16, a water replenishment pipe 17, a water replenishment control valve 18, a liquid level meter 19, a discharge pipe 20, a discharge control valve 21, a pressure pump 22, a pressure control valve 23, a return pipe 24, a return flow control valve 25, a pressure transmitter 26, a filtration shut-off valve 27, a steam pipe 28, and a steam control valve 29.
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 polymerization apparatus parking vacuum pumping system 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 polymerization kettle 69, a polymerization kettle 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 apparatus 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 parking vacuum tube 7, and a parking control valve 8 is installed on the parking vacuum tube 7; a nitrogen pipe 9 is communicated with the parking vacuum pipe 7 at the outlet side of the parking control valve 8, and a nitrogen control valve 10 is arranged on the nitrogen pipe 9; the outlet of the water ring vacuum pump 2 is communicated with the inlet pipeline of the separating tank 3, the gas outlet of the separating tank 3 is communicated with a recovery pipe 11 and an emptying pipe 12, the outlet end of the recovery pipe 11 is communicated with the inlet of a continuous recovery compressor 68 of the polymerization device, and the recovery pipe 11 and the emptying pipe 12 are respectively provided with a recovery control valve 13 and an emptying control valve 14; a liquid outlet of the separation tank 3 is communicated with an inlet pipeline of the filter 4, and a pipeline between the separation tank 3 and the filter 4 is communicated with a filtering control valve 15; the filter device comprises two filters 4 which are arranged in parallel, wherein a filtering stop valve 27 is arranged at the inlet and the outlet of each filter 4, and the two filters can be mutually standby by switching the filtering stop valves 27. 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 a cooling water pipe 16.
The parking process is, the discharging and stripping unit of the polymerization device is parked firstly, the water ring vacuum pump 2 is started, under the suction effect of the water ring vacuum pump 2, the gas in the discharging groove 61 of the polymerization kettle, the stripping feeding groove 62, the stripping tower 63, the slurry groove 64, the monomer recovery separator 65, the fresh monomer groove 66 and the recovery monomer groove 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 is upwards discharged to the separation tank 3 through the parking vacuum tube 7 and the water ring vacuum pump 2 for gas-liquid separation, and the separated liquid is sent to the filter 4 to filter impurities and then enters the cooler 5 for cooling.
The separated gas is sent to the continuous recovery compressor 68 through the recovery pipe 11 and then enters the monomer recovery system, so as to recover the effective components in the system during parking, and simultaneously, the rest toxic and harmful gas is sent to the gas holder of the monomer recovery system, so that the toxic and harmful gas is prevented from being discharged. A return pipe 24 is communicated between the recovery pipe 11 at the inlet end of the recovery control valve 13 and the parking vacuum pipe 7 between the nitrogen pipe 9 and the water ring vacuum pump 2, and a return control valve 25 is arranged on the return pipe 24; the return control valve 25 is a pressure switch, a pressure transmitter 26 is arranged on the parking vacuum pipe 7 between the return pipe 24 and the water ring vacuum pump 2, and the pressure transmitter 26 is interlocked with the pressure switch. In the process of sending the gas discharged from the separation tank 3 back to the continuous recovery compressor 68, the pressure transmitter 26 can detect the pressure in front of the water ring vacuum pump 2, and when the pressure is lower than a set lower limit value, the backflow control valve 25 is opened, so that part of the gas separated from the separation tank 3 flows back to the water ring vacuum pump 2 to supplement the pressure, and the stability of the system is ensured.
When the content of the toxic and harmful gases in the vacuum jet separator 1 is reduced to be below the standard content, stopping a monomer recovery unit of the polymerization device, closing a recovery control valve 13, opening an evacuation control valve 14, and directly evacuating the gases discharged from the separation tank 3 through an evacuation pipe 12; after the vacuum pumping is finished, opening the nitrogen control valve 10, introducing nitrogen into the system behind the water ring vacuum pump 2 through the nitrogen pipe 9 to break the vacuum, and finally closing the water ring vacuum pump 2.
Preferably, in the embodiment, the outlet of the cooling water pipe 16 is communicated with the water inlet pipeline of the water ring vacuum pump, the separation tank 3 is communicated with a water supplementing pipe 17, and the water supplementing pipe 17 is provided with a water supplementing control valve 18; the separation tank 3 is provided with a liquid level meter 19, a discharge pipe 20 is connected to a pipeline on the outlet side of the filtration control valve 15, a discharge control valve 21 is mounted on the discharge pipe 20, and the liquid level meter 19 is interlocked with the water supply control valve 18 and the discharge control valve 21, respectively. The liquid level meter 19 is used for detecting the liquid level in the separation tank 3, and when the liquid level meter 19 detects that the liquid level in the separation tank 3 is lower than a set lower limit value, the water supplementing control valve 18 is opened to supplement water into the separation tank through a water supplementing pipe; when the level gauge 19 detects that the liquid level in the separation tank 3 exceeds a set upper limit value, the drain control valve 21 is opened, and part of the water discharged from the separation tank 3 is discharged from the drain pipe 20 to the drain.
The device also comprises a pressure pump 22, wherein the inlet of the pressure pump 22 is communicated with a liquid outlet pipeline of the separation tank 3, the outlet of the pressure pump 22 is communicated with an inlet pipeline of the filter 4, and pressure control valves 23 are respectively arranged on pipelines at the inlet side and the outlet side of the pressure pump 22; when the liquid level in the separation tank 3 is low and the pressure is insufficient or the filter 4 is clogged, the pressurizing control valve 23 may be opened to pressurize the water in the bottom of the separation tank 3 by the pressurizing pump 22 and then pump the pressurized water into the filter 4.
A steam pipe 28 is communicated with the side part of the vacuum jet separator 1, and a steam control valve 29 is arranged on the steam pipe 28; after the primary vacuum pumping is finished, the steam control valve 29 is opened, steam is sent into the vacuum jet separator 1 through the steam pipe 28, the secondary vacuum pumping is carried out after the vacuum breaking in the vacuum pumping process is repeated, and the toxic and harmful gases in the equipment are completely removed after the secondary vacuum pumping is carried out for 2-3 times.
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 parking 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 parking vacuum tube, and a parking control valve is installed on the parking vacuum tube; a nitrogen pipe is communicated with the parking vacuum pipe on the outlet side of the parking control valve, and a nitrogen control valve is installed on the nitrogen pipe; the outlet of the water ring vacuum pump is communicated with the inlet pipeline of the separation tank, the gas outlet of the separation tank is communicated with a recovery pipe and an emptying pipe, the outlet end of the recovery pipe is communicated with the inlet of a continuous recovery compressor of the polymerization device, and the recovery pipe and the emptying pipe are respectively provided with a recovery control valve and an emptying control valve; the liquid outlet of the separation tank is communicated with an inlet pipeline of the filter, a filtering control valve is communicated with a pipeline between the separation tank and the filter, the outlet of the filter is communicated with an inlet pipeline of the cooler, and the outlet of the cooler is communicated with a cooling water pipe.
2. The system for parking and vacuumizing a polymerization device according to claim 1, wherein an outlet of the cooling water pipe is communicated with a 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 plant shutdown vacuum pumping system according to claim 2, wherein a liquid level meter is provided on the separation tank, a discharge pipe is connected to a pipeline on an outlet side of the filtration control valve, a discharge control valve is installed on the discharge pipe, and the liquid level meter is interlocked with the makeup control valve and the discharge control valve, respectively.
4. The system for stopping and evacuating a polymerization plant according to any one of claims 1 to 3, further comprising a pressurizing pump, wherein an inlet of the pressurizing pump is communicated with a drain port pipeline of the separation tank, an outlet of the pressurizing pump is communicated with an inlet pipeline of the filter, and pressurizing control valves are installed on both of the inlet and outlet side pipelines of the pressurizing pump.
5. The system of any one of claims 1 to 3, wherein a return pipe is connected between the recovery pipe at the inlet end of the recovery control valve and the parking vacuum pipe between the nitrogen gas pipe and the water ring vacuum pump, and a return control valve is mounted on the return pipe.
6. The polymerization plant parking evacuation system of claim 5 wherein said return control valve is a pressure switch and a pressure transducer is mounted on said parking vacuum line between said return line and said water ring vacuum pump, said pressure transducer being interlocked with said pressure switch.
7. The polymerization plant shut down vacuum pumping system according to claim 1, 2, 3 or 6, comprising two of said filters arranged in parallel, with a filter shut-off valve installed on each of the inlet and outlet of said filters.
8. The polymerization plant shut down vacuum pumping system according to claim 5, comprising two of said filters arranged in parallel, with a filter shut-off valve installed on each of the inlet and outlet of said filters.
9. The system of claim 1, 2, 3, 6 or 8, 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 of claim 5, 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121944847.7U CN215927699U (en) | 2021-08-18 | 2021-08-18 | Polymerization plant parking vacuum pumping system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121944847.7U CN215927699U (en) | 2021-08-18 | 2021-08-18 | Polymerization plant parking vacuum pumping system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215927699U true CN215927699U (en) | 2022-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121944847.7U Active CN215927699U (en) | 2021-08-18 | 2021-08-18 | Polymerization plant parking vacuum pumping system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215927699U (en) |
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2021
- 2021-08-18 CN CN202121944847.7U patent/CN215927699U/en active Active
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