CN218307821U - Vacuum system hydrops remove device - Google Patents
Vacuum system hydrops remove device Download PDFInfo
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- CN218307821U CN218307821U CN202222055119.1U CN202222055119U CN218307821U CN 218307821 U CN218307821 U CN 218307821U CN 202222055119 U CN202222055119 U CN 202222055119U CN 218307821 U CN218307821 U CN 218307821U
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Abstract
The utility model belongs to the technical field of the chemical production equipment, concretely relates to vacuum system hydrops remove device adds vapour and liquid separator on the house steward that emptys, and vapour and liquid separator includes defogging section and straight tube section, and defogging section and straight tube section are inside to communicate with each other, and the defogging section is located straight tube section top, and defogging section is inside to be equipped with the fibre defroster. The utility model discloses can prevent to produce the hydrops among the blowdown house steward, eliminate the potential safety hazard, realize the safety in production.
Description
Technical Field
The utility model relates to a chemical production equipment technical field, concretely relates to vacuum system hydrops remove device.
Background
The production process of polyvinylidene fluoride (PVDF) by polymerizing vinylidene fluoride (VDF) is carried out in a high-pressure reaction kettle. The specific production process comprises the following steps: under normal pressure, 5600kg of high-purity water is added into a reaction kettle, after the high-purity water is added, the water adding valve and other valves of the reaction kettle are confirmed to be closed, steam is introduced into the reaction kettle, the temperature is increased to 30 to 40 ℃, the vacuum pumping valve of the reaction kettle is opened, the reaction kettle is vacuumized to be more than minus 0.09MPa, the reaction kettle is started to stir for 1 minute every 10 minutes, the operation is repeated for 3 times, a nitrogen pipeline valve is opened, nitrogen is filled into the reaction kettle to reach the pressure of 0.05MPa, the vacuum pumping valve is opened, the pressure in the reaction kettle is pumped to be minus 0.05MPa, and the oxygen content is tested after 0.1MPaVDF (the content is 99.999 percent) is added. And (3) after the oxygen content is less than or equal to 30ppm, starting stirring of the reaction kettle, setting the frequency to be 60%, opening a steam stop valve, adjusting the valve to open the opening of 60 to 80%, and heating the reaction kettle to 80 to 90 ℃. And starting the compressor at the position of the compressor, compressing the VDF, opening a VDF feeding cut-off valve and an adjusting valve of the reaction kettle, and increasing the pressure to 3.6-4.5 MPa. After constant temperature and pressure for 10 minutes. Adding emulsifier and initiator. And in the reaction period, controlling the reaction temperature to be 80-90 ℃ by adjusting the introduction amount of circulating water in the kettle, stopping stirring and relieving pressure when the predetermined VDF reaction amount is reached, and finishing the reaction.
After the reaction is finished, emulsion in the kettle is placed into an emulsion tank, the emulsion in the emulsion tank enters a washing tank after large-particle materials are removed through a filter, the materials in the washing tank enter a plate frame through an air pump for washing, the washed qualified PVDF resin enters a flash evaporation dryer for drying, the dried finished PVDF resin is packaged and put in storage, and the finished PVDF resin is sold to the outside after being qualified through analysis and detection. And (3) recycling the unreacted VDF through a recycling system, vacuumizing to replace the VDF after recycling the VDF to a certain pressure and being incapable of recycling the VDF, and emptying to a burning device.
At present, the preliminary preparation stage of the polymerization reaction needs to be carried out under the condition of about 40 ℃ for vacuumizing, replacing and deoxidizing; after the reaction is finished, the VDF is replaced by vacuumizing at 50-60 ℃, the boiling point of water is reduced in a vacuum state, water vapor is easily brought out in the vacuumizing process, so that more accumulated liquid is generated in an emptying header pipe behind a vacuum pump, and the accumulated liquid is accumulated in a pipeline if the accumulated liquid cannot be discharged in time. Because most equipment relief valve export is direct to on the exhaust main, the relief valve export is blockked up easily to the hydrops, influences the normal work of relief valve, has great potential safety hazard.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a vacuum system hydrops remove device, prevent to produce the hydrops in the unloading house steward, eliminate the potential safety hazard, realize the safety in production.
Vacuum system hydrops remove device, add vapour and liquid separator on unloading house steward.
Preferably, vapour and liquid separator includes defogging section and straight tube section, and defogging section and straight tube section are inside to communicate with each other, and the defogging section is located straight tube section top, and the defogging section is inside to be equipped with the fibre defroster.
Preferably, the demisting section is provided with an air outlet at the position above the fiber demister, the air outlet is connected with the incineration device through a pipeline, and an air outlet valve is arranged on the pipeline between the air outlet and the incineration device; the top of the demisting section is provided with a spray header, the spray header is connected with a spray device through a pipeline, and a water outlet valve is arranged on the pipeline between the spray header and the spray device; the straight pipe section is provided with an air inlet, a liquid outlet and a purging port, the air inlet and the purging port are arranged at the upper part of the straight pipe section, the liquid outlet is arranged at the lower part of the straight pipe section, the air inlet is connected with the emptying header pipe, and an air inlet valve is arranged between the air inlet and the emptying header pipe; the purging port is respectively connected with the sampling port and the nitrogen port through pipelines, the communicating pipelines are respectively provided with a sampling valve and a purging valve, and the sampling port is fixedly provided with a combustible gas detector for detecting the combustible gas content at the sampling port; the liquid outlet is connected with the sewage pump through a pipeline, and a sewage valve is arranged on the pipeline between the liquid outlet and the sewage pump.
Preferably, still include the PLC controller, high level gauge and low level gauge, the straight tube section inner upper portion is located to high level gauge, the straight tube section inner bottom is located to the low level gauge, high level gauge and low level gauge are used for detecting the straight tube section inner liquid level respectively, the input module and the high level gauge of PLC controller, the low level gauge, the equal electric connection of combustible gas detector, be used for gathering high level gauge, the low level gauge, the information of combustible gas detector, the output module and the admission valve of PLC controller, the sampling valve, the equal electric connection of purge valve and sewage pump, in order to realize the admission valve, the sampling valve, the control of purge valve and sewage pump, the sewage valve is each other interlocking with the start-up of sewage pump, when the sewage pump starts, the sewage valve is electrified to be opened, when the sewage pump stops, the sewage valve loses the electricity and closes.
Preferably, the sewage pump is an air operated diaphragm pump.
Preferably, the water outlet of the sewage pump is communicated with the wastewater pool.
Preferably, the gas-liquid separator is placed on the ground level at the lowest position of the emptying header pipe.
The diameter of the gas-liquid separator is 1200mm, the diameter of the straight pipe section is 2200mm, and the volume of the gas-liquid separator is 3.5m 3 The material is Q345R alloy steel. The fiber demister comprises a 13-micron filter bed layer and a 304 stainless steel framework, and the bed layer air speed of the fiber demister is less than 0.15m/s.
Compared with the prior art, the beneficial effects of the utility model are that: the steam is brought out in the vacuumizing process and is absorbed by the gas-liquid separator, so that accumulated liquid is prevented from being generated in the emptying header pipe, potential safety hazards are eliminated, and safe production is realized.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
in the figure: 1. a sewage pump; 2. an incineration device; 3. a spraying device; 4. a demisting section; 5. a straight pipe section; 6. a fiber mist eliminator; 7. an air outlet; 8. an air outlet valve; 9. a shower head; 10. a water outlet valve; 11. an air inlet; 12. a liquid discharge port; 13. a purge port; 14. emptying a header pipe; 15. an intake valve; 16. a sampling port; 17. a nitrogen port; 18. a sampling valve; 19. a purge valve; 20. a combustible gas detector; 21. a sewage valve; 22. a PLC controller; 23. a high level gauge; 24. a low level gauge; 25. a wastewater tank.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown.
As shown in figure 1, the vacuum system hydrops removing device of the utility model is additionally provided with a gas-liquid separator on the emptying header pipe. Vapour and liquid separator includes defogging section 4 and straight tube section 5, and defogging section 4 and straight tube section 5 are inside to communicate with each other, and defogging section 4 is located straight tube section 5 top, and defogging section 4 is inside to be equipped with fiber demister 6.
The demisting section 4 is provided with an air outlet 7 at the position above the fiber demister 6, the air outlet 7 is connected with the incineration device 2 through a pipeline, and an air outlet valve 8 is arranged on the pipeline between the air outlet 7 and the incineration device 2; the top of the demisting section 4 is provided with a spray header 9, the spray header 9 is connected with the spray device 3 through a pipeline, and a water outlet valve 10 is arranged on the pipeline between the spray header 9 and the spray device 3; the straight pipe section 5 is provided with an air inlet 11, a liquid outlet 12 and a purging port 13, the air inlet 11 and the purging port 13 are arranged at the upper part of the straight pipe section 5, the liquid outlet 12 is arranged at the lower part of the straight pipe section 5, the air inlet 11 is connected with a discharging main pipe 14, and an air inlet valve 15 is arranged between the air inlet 11 and the discharging main pipe 14; the purging port 13 is respectively connected with the sampling port 16 and the nitrogen port 17 through pipelines, the communicating pipelines are respectively provided with a sampling valve 18 and a purging valve 19, and the sampling port 16 is fixedly provided with a combustible gas detector 20 for detecting the content of combustible gas at the sampling port 16; the liquid outlet 12 is connected with the sewage pump 1 through a pipeline, a sewage valve 21 is arranged on the pipeline between the liquid outlet 12 and the sewage pump 1, the sewage pump 1 is a pneumatic diaphragm pump, and the water outlet of the sewage pump 1 is communicated with a wastewater pool 25.
The device is characterized by further comprising a PLC (programmable logic controller) 22, a high liquid level meter 23 and a low liquid level meter 24, wherein the high liquid level meter 23 is arranged at the upper part in the straight pipe section 5, the low liquid level meter 24 is arranged at the bottom in the straight pipe section 5, the high liquid level meter 23 and the low liquid level meter 24 are respectively used for detecting the liquid level in the straight pipe section 5, an input module of the PLC 22 is electrically connected with the high liquid level meter 23, the low liquid level meter 24 and the combustible gas detector 20 and used for collecting information of the high liquid level meter 23, the low liquid level meter 24 and the combustible gas detector 20, an output module of the PLC 22 is electrically connected with the air inlet valve 15, the sampling valve 18, the purging valve 19 and the sewage pump 1, and the air inlet valve 15, the sampling valve 18, the purging valve 19 and the sewage pump 1 are controlled, the sewage valve 21 is interlocked with the sewage pump 1 in starting, when the sewage pump 1 is started, the sewage valve 21 is powered on and the sewage pump 1 is stopped, and the sewage valve 21 is powered off.
The gas-liquid separator is placed on the ground level at the lowest position of the emptying manifold 14.
The diameter of the gas-liquid separator is 1200mm, the diameter of the straight pipe section 5 is 2200mm, and the volume is 3.5m 3 The material is Q345R alloy steel. The fiber demister 6 comprises a filter bed layer with the thickness of 13 mu m and a 304 stainless steel framework, and the bed layer air speed of the fiber demister 6 is less than 0.15m/s.
The working process is as follows: after the reaction is finished, when the VDF is replaced by vacuumizing, the boiling point of water is reduced in a vacuum state, water vapor is brought out in the vacuumizing process, the air inlet valve 15 is opened, the tail gas with the water vapor enters the gas-liquid separator from the air inlet 11 through the air exhaust main pipe 14, the fiber demister 6 in the demisting section 4 can fully absorb the water in the tail gas, capture the water and condense the water into liquid drops, and then the liquid drops are collected in the straight pipe section 5; and (3) opening a water outlet valve 10 for water absorption gas contained in the tail gas, spraying water by the industrial water spraying device 3 through a spray header 9, fully absorbing the gas, and collecting the gas and the sprayed water to the straight pipe section 5. The dehydrated tail gas enters the incineration device 2 from the gas outlet 7 through the gas outlet valve 8 for incineration.
When the liquid level in the straight pipe section 5 of the gas-liquid separator reaches the position of a high liquid level meter 23, the PLC 22 receives a high liquid level signal and sends a control instruction, the air inlet valve 15 is closed, the purging valve 19 and the sampling valve 18 are opened, nitrogen purging is carried out in the straight pipe section 5, meanwhile, the combustible gas detector 20 starts to detect the gas in the straight pipe section 5, when the content of the combustible gas detected by the combustible gas detector 20 reaches a specified standard, a signal is transmitted to the PLC 22, the PLC 22 sends the control instruction, the sewage pump 1 works, the interlocking sewage valve 21 is opened, and the wastewater in the straight pipe section 5 is discharged to the wastewater tank 25; when the wastewater is discharged to the position of the low liquid level meter 24, the PLC 22 receives a high liquid level signal and sends a control instruction, the air inlet valve 15 is opened, the purging valve 19 and the sampling valve 18 are closed, the sewage pump 1 stops pumping, the interlocking sewage valve 21 is closed, and the treatment work of the tail gas containing water vapor is continued.
Claims (6)
1. The utility model provides a vacuum system hydrops remove device, its characterized in that adds vapour and liquid separator on unloading house steward, and vapour and liquid separator includes defogging section (4) and straight tube section (5), and defogging section (4) and straight tube section (5) are inside to communicate with each other, and defogging section (4) are located straight tube section (5) top, and defogging section (4) are inside to be equipped with fiber defroster (6).
2. The vacuum system effusion removal device according to claim 1, characterized in that the demisting section (4) is provided with an air outlet (7) at a position above the fiber demister (6), the air outlet (7) is connected to the incineration device (2) through a pipeline, and an air outlet valve (8) is provided on the pipeline between the air outlet (7) and the incineration device (2); the top of the demisting section (4) is provided with a spray header (9), the spray header (9) is connected with the spray device (3) through a pipeline, and a water outlet valve (10) is arranged on the pipeline between the spray header (9) and the spray device (3); the straight pipe section (5) is provided with an air inlet (11), a liquid outlet (12) and a purging port (13), the air inlet (11) and the purging port (13) are arranged at the upper part of the straight pipe section (5), the liquid outlet (12) is arranged at the lower part of the straight pipe section (5), the air inlet (11) is connected with a drain main pipe (14), and an air inlet valve (15) is arranged between the air inlet (11) and the drain main pipe (14); the purging port (13) is respectively connected with the sampling port (16) and the nitrogen port (17) through pipelines, the communicating pipelines are respectively provided with a sampling valve (18) and a purging valve (19), and the sampling port (16) is fixedly provided with a combustible gas detector (20) for detecting the content of combustible gas at the sampling port (16); the liquid outlet (12) is connected with the sewage pump (1) through a pipeline, and a sewage valve (21) is arranged on the pipeline between the liquid outlet (12) and the sewage pump (1).
3. The vacuum system effusion removing device of claim 2, further comprising a PLC controller (22), a high level gauge (23) and a low level gauge (24), wherein the high level gauge (23) is arranged on the upper part in the straight pipe section (5), the low level gauge (24) is arranged on the bottom in the straight pipe section (5), an input module of the PLC controller (22) is electrically connected with the high level gauge (23), the low level gauge (24) and the combustible gas detector (20), an output module of the PLC controller (22) is electrically connected with the air inlet valve (15), the sampling valve (18), the purging valve (19) and the sewage pump (1).
4. Vacuum system effusion removal device according to claim 2, characterized in that the sewage pump (1) is a pneumatic diaphragm pump.
5. Vacuum system liquid accumulation removal device according to claim 2, characterized in that the outlet of the sewage pump (1) is connected to a wastewater tank (25).
6. The vacuum system effusion removal device according to claim 1, characterized in that the gas-liquid separator is placed on the floor level, in the lowest position of the emptying header (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222055119.1U CN218307821U (en) | 2022-08-05 | 2022-08-05 | Vacuum system hydrops remove device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222055119.1U CN218307821U (en) | 2022-08-05 | 2022-08-05 | Vacuum system hydrops remove device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218307821U true CN218307821U (en) | 2023-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222055119.1U Active CN218307821U (en) | 2022-08-05 | 2022-08-05 | Vacuum system hydrops remove device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218307821U (en) |
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2022
- 2022-08-05 CN CN202222055119.1U patent/CN218307821U/en active Active
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