Automatic closed drainage device for water separator of calcium carbide production process

Abstract

The utility model relates to the technical field of vinyl chloride production drainage, concretely is automatic closed drainage device of vinyl chloride gas cabinet water separator in calcium carbide method production process, including water separator, closed drainage jar and waste water conveying component, one side of water separator is detachably connected with import sounding tube, the other end of import sounding tube is provided with water separator import pipeline, the bottom of water separator is detachably connected with first drainage pipeline, the other end of first drainage pipeline is detachably connected with the outer surface of closed drainage jar, the upper end of closed drainage jar is provided with balance pipeline, the other end of balance pipeline is detachably connected with the upper end of water separator. The automatic closed drainage device of vinyl chloride gas cabinet water separator in calcium carbide method production process, through water separator physical separation vinyl chloride gas moisture, closed drainage jar stores up waste water and prevents VC, acetylene volatilization, waste water conveying component automatically transports the waste water after filtration to downstream, solves the problem that the existing process relies on manual inspection drainage, waste water direct discharge pollutes the environment.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology in vinyl chloride production, specifically to an automatic closed drainage device for a water separator in a vinyl chloride gas tank during the calcium carbide production process. Background Technology

[0002] Vinyl chloride is a carcinogen. Long-term exposure can cause vinyl chloride disease, manifested as neurasthenia syndrome, hepatomegaly, abnormal liver function, and digestive disorders. Skin contact with liquid vinyl chloride can cause erythema, edema, or necrosis. Short-term exposure to low concentrations can irritate the eyes and skin. Contact with liquid vinyl chloride can cause frostbite due to rapid evaporation. Inhalation of concentrations above 0.5% can cause dizziness, headache, nausea, vomiting, restlessness, and disorientation. In polyvinyl chloride (PVC) production, the vinyl chloride gas tank water separator is an indispensable key piece of equipment in the production system. It works on the combined principle of gravity sedimentation and centrifugal separation. After the moisture-containing vinyl chloride gas enters the separator, it first passes through... The airflow guiding device changes the trajectory of motion, forming a high-speed rotating airflow. Utilizing the density difference between water and gas, water droplets are thrown towards the wall under centrifugal force, and then settle along the wall to the liquid collection chamber at the bottom of the equipment. At the same time, the baffles or packing layer inside the separator can further intercept the tiny droplets in the airflow that have not been separated by centrifugation, realizing secondary gas-liquid separation. Finally, the dehydrated and dried vinyl chloride gas is discharged from the top outlet of the separator and enters the subsequent polymerization process, while the collected liquid water is periodically discharged through the bottom drain valve. This effectively removes the liquid water generated by condensation or ambient humidity during the preparation and transportation of vinyl chloride gas, ensuring that the gas dryness meets the standards.

[0003] However, existing technologies have the following problems in practical use; In the existing process of producing PVC using the calcium carbide method, the wastewater separated in the vinyl chloride gas holder gas-water separator is discharged by on-site personnel during inspections and is directly discharged into the wastewater pool during the discharge process. This causes the dissolved vitamin C and acetylene gases in the water to volatilize into the atmosphere, causing pollution to the surrounding environment. When it encounters a pit, it accumulates and forms an explosive mixture with air, posing a risk of explosion and fire when it encounters a source of ignition. Utility Model Content

[0004] (a) Technical problems to be solved To overcome the aforementioned deficiencies of the prior art, this utility model provides an automatic closed drainage device for the vinyl chloride gas tank water separator in the calcium carbide production process. This solves the problem mentioned in the background art that in the existing calcium carbide process for PVC production, the wastewater separated in the vinyl chloride gas tank water separator is drained by on-site personnel during inspections and is directly discharged into the wastewater pool during the discharge process. This causes dissolved vitamin C and acetylene gases in the water to volatilize into the atmosphere, causing pollution to the surrounding environment. Furthermore, the wastewater accumulates in the pit and forms an explosive mixture with air, posing a risk of explosion and fire when exposed to a source of ignition.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: an automatic sealed drainage device for a vinyl chloride gas tank water separator during the calcium carbide production process, comprising a water separator, a sealed drainage tank, and a wastewater conveying assembly. One side of the water separator is detachably connected to an inlet probe, and the other end of the inlet probe is connected to a water separator inlet pipeline. The bottom of the water separator is detachably connected to a first drainage pipeline, the other end of which is detachably connected to the outer surface of the sealed drainage tank. A balancing pipeline is located at the upper end of the sealed drainage tank, and the other end of the balancing pipeline is detachably connected to the upper end of the water separator. A second drainage pipeline is located at the lower end of the sealed drainage tank, and the other end of the second drainage pipeline is detachably connected to a filter. The output end of the filter is equipped with a pre-filter drain, and the output end of the pre-filter drain is equipped with a pipeline filter. The output end of the pipeline filter is detachably connected to an inlet pipeline, and the other end of the inlet pipeline is detachably connected to the input end of the wastewater conveying assembly.

[0006] Preferably, a first manual valve is provided at the end of the balancing pipeline near the sealed drainage tank, and a second manual valve is provided at the end of the balancing pipeline near the water separator.

[0007] Preferably, a pressure valve is provided on the upper end of the sealed drainage tank near the first pipeline hand valve, and a local pressure gauge is detachably connected to the upper end of the pressure valve, and a remote pressure gauge is detachably connected to the upper end of the local pressure gauge.

[0008] Preferably, a remote level gauge is detachably connected to the outer surface of the sealed drainage tank, and a level gauge SIS instrument is provided on one side of the remote level gauge.

[0009] Preferably, a second drain line valve is detachably connected to the side of the outer surface of the second drain line away from the filter.

[0010] Preferably, the wastewater conveying assembly includes a wastewater conveying pump, the input end of which is detachably connected to one end of the inlet pipeline, the output end of which is provided with a third drainage pipeline, a pressure gauge pipeline is provided in the middle of the outer surface of the third drainage pipeline, the other end of which is detachably connected to a pressure gauge manual valve, the other end of which is provided with an outlet shut-off valve, a SIS instrument controller is provided on one side of the outlet shut-off valve, a shut-off manual valve is provided at the output end of the outlet shut-off valve, an outlet pipeline is provided at the output end of the shut-off manual valve, and a remote start button and a remote stop button are connected to one side of the wastewater conveying pump via a cable.

[0011] Preferably, a first drain pipe valve is provided at the middle of the outer surface of the first drain pipe.

[0012] (III) Beneficial Effects This utility model provides an automatic closed-loop drainage device for the water separator in the vinyl chloride gas holder during the calcium carbide production process, which has the following beneficial effects: This automatic closed-loop drainage device for the vinyl chloride gas holder water separator in the calcium carbide production process utilizes a coordinated setup of a water separator, a closed drainage tank, and wastewater conveying components. During operation, water enters the water separator through the inlet pipeline and inlet probe for physical dehydration. This physical process separates moisture from the vinyl chloride gas, drying it before it enters the gas holder. The treated gas then flows into the closed drainage tank, which temporarily stores the wastewater from the water separator. Its sealed structure prevents the volatilization of dissolved vitamin C and acetylene in the wastewater, thus avoiding the safety hazards of gas accumulation. It reduces volatile organic compound emissions, meets environmental protection requirements, and avoids the direct discharge of wastewater into the wastewater pool during routine drainage inspections by on-site personnel. This prevents dissolved vitamin C and acetylene gases from evaporating into the atmosphere, which could lead to environmental pollution and explosion risks. At the same time, the wastewater conveying component can automatically transport filtered wastewater from the sealed drainage tank to the downstream treatment process, replacing manual drainage. Furthermore, when wastewater enters the wastewater conveying component, filters and pipeline filters can further filter large particles and fine impurities, improving filtration accuracy and providing double protection for the wastewater conveying component to prevent damage from impurities. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the wastewater conveying component of this utility model; Figure 3 This is a schematic diagram of the structure of the sealed drainage tank of this utility model.

[0014] In the diagram: 1. Water separator; 2. Sealed drainage tank; 3. Wastewater conveying assembly; 301. Wastewater conveying pump; 302. Third drainage pipeline; 303. Pressure gauge pipeline; 304. Pressure gauge manual valve; 305. Outlet shut-off valve; 306. SIS instrument controller; 307. Shut-off manual valve; 308. Outlet pipeline; 309. Remote start button; 310. Remote shut-off button; 4. Inlet probe; 5. Water separator inlet pipeline; 6. First drainage pipeline; 7. Balancing pipeline; 8. Second drainage pipeline; 9. Filter; 10. Pre-filter drain; 11. Pipeline filter; 12. Inlet pipeline; 13. First pipeline manual valve; 14. Second pipeline manual valve; 15. Pressure valve; 16. Local pressure gauge; 17. Remote pressure gauge; 18. Remote level gauge; 19. Level gauge SIS instrument; 20. Second drainage pipeline valve; 21. First drainage pipeline valve. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0016] Example 1; Please see Figure 1 , Figure 2 and Figure 3This utility model provides a technical solution: an automatic sealed drainage device for a vinyl chloride gas tank water separator in the calcium carbide production process, including a water separator 1, a sealed drainage tank 2, and a wastewater conveying assembly 3. An inlet probe 4 is detachably connected to one side of the water separator 1, and a water separator inlet pipeline 5 is installed at the other end of the inlet probe 4. A first drainage pipeline 6 is detachably connected to the bottom of the water separator 1, and a first drainage pipeline valve 21 is installed in the middle of the outer surface of the first drainage pipeline 6. The other end of the first drainage pipeline 6 is detachably connected to the outer surface of the sealed drainage tank 2. A remote level gauge 18 is detachably connected to the outer surface of the sealed drainage tank 2, and a level gauge SIS instrument 19 is installed on one side of the remote level gauge 18. A balancing pipeline 7 is installed at the upper end of the sealed drainage tank 2, and a first pipeline manual valve 13 is installed at the end of the balancing pipeline 7 near the sealed drainage tank 2. The balancing pipeline 7 is close to the water separator 1. One end of the sealed drainage tank 2 is equipped with a second pipeline manual valve 14. A pressure valve 15 is installed on the upper end of the sealed drainage tank 2 near the first pipeline manual valve 13. A local pressure gauge 16 is detachably connected to the upper end of the pressure valve 15. A remote pressure gauge 17 is detachably connected to the upper end of the local pressure gauge 16. The other end of the balance pipeline 7 is detachably connected to the upper end of the water separator 1. A second drainage pipeline 8 is installed at the lower end of the sealed drainage tank 2. A second drainage pipeline valve 20 is detachably connected to the outer surface of the second drainage pipeline 8 away from the filter 9. A filter 9 is detachably connected to the other end of the second drainage pipeline 8. A filter pre-shower 10 is installed at the output end of the filter 9. A pipeline filter 11 is installed at the output end of the filter pre-shower 10. An inlet pipeline 12 is detachably connected to the output end of the pipeline filter 11. The other end of the inlet pipeline 12 is detachably connected to the input end of the wastewater conveying assembly 3. Through the above technical solution, in use, the first drainage pipeline 6 connects the bottom of the water separator 1 to the sealed drainage tank 2, enabling the wastewater separated in the water separator 1 to be transported to the sealed drainage tank 2 for temporary storage. It serves as the wastewater transport pipeline. Simultaneously, the first drainage pipeline valve 21 is installed in the middle of the outer surface of the first drainage pipeline 6 to control the opening and closing of the first drainage pipeline 6, adjusting the timing and rate at which the water separator 1 transports wastewater to the sealed drainage tank 2. Furthermore, the balancing pipeline 7 connects the upper end of the water separator 1 to the upper end of the sealed drainage tank 2, balancing the internal air pressure to ensure that the wastewater in the water separator 1 flows smoothly into the sealed drainage tank 2, while preventing abnormal pressure inside the equipment. The first pipeline manual valve 13 is installed at the end of the balancing pipeline 7 near the sealed drainage tank 2, controlling the opening and closing of the balancing pipeline 7 at the sealed drainage tank 2 end, and adjusting the air pressure balance as needed. Simultaneously, the second pipeline manual valve 14 is installed at the end of the balancing pipeline 7 near the water separator 1. The pressure valve 15 is used in conjunction with the first pipeline hand valve 13 to control the opening and closing of the balance pipeline 7, ensuring the controllability of air pressure balance. The pressure valve 15 is located on the upper end of the sealed drainage tank 2 near the first pipeline hand valve 13. It is used to control the connection between the local pressure gauge 16 and the remote pressure gauge 17 and the sealed drainage tank 2, which facilitates the maintenance of the pressure gauges. The local pressure gauge 16 allows the operator to visually view the pressure in the sealed drainage tank 2 on-site and keep track of the pressure status in the tank in real time. The remote pressure gauge 17 can remotely transmit the pressure signal in the sealed drainage tank 2 to the external control system to realize remote pressure monitoring. The remote level gauge 18 is installed on the outer surface of the sealed drainage tank 2 to detect the liquid level of the wastewater in the tank in real time and transmit the liquid level signal to the level gauge SIS instrument 19. The level gauge SIS instrument 19 can receive the liquid level signal and transmit it to the external SIS system as a key signal source to trigger the start and stop of the wastewater conveying component 3. The second drainage pipeline 8 connects the sealed drainage tank 2 and the filter 9, which can transport the wastewater temporarily stored in the sealed drainage tank 2 to the subsequent filtration and conveying components. The filter 9 can filter out larger particulate impurities in the wastewater, preliminarily purify the wastewater, and protect the subsequent pipeline filter 11 and wastewater conveying components 3. The pre-filter drain 10 is set at the output end of the filter 9 and can be opened periodically to discharge the accumulated liquid and impurities in front of the filter 9, which facilitates the maintenance and cleaning of the filter 9 and prevents impurities from clogging the pipeline. The second drainage pipeline valve 20 is installed on the outer surface of the second drainage pipeline 8 and is used to control the opening and closing of the second drainage pipeline 8. It can cut off the wastewater conveying in case of equipment maintenance or abnormal conditions. The inlet pipeline 12 can transport the filtered wastewater to the wastewater conveying components 3. Example 2; Please see Figure 1 and Figure 3This utility model provides a technical solution based on Embodiment 1. The wastewater conveying assembly 3 includes a wastewater conveying pump 301. The input end of the wastewater conveying pump 301 is detachably connected to one end of the inlet pipeline 12. The output end of the wastewater conveying pump 301 is provided with a third drainage pipeline 302. A pressure gauge pipeline 303 is provided in the middle of the outer surface of the third drainage pipeline 302. The other end of the pressure gauge pipeline 303 is detachably connected to a pressure gauge hand valve 304. The other end of the third drainage pipeline 302 is provided with an outlet shut-off valve 305. An SIS instrument controller 306 is provided on one side of the outlet shut-off valve 305. A shut-off hand valve 307 is provided at the output end of the outlet shut-off valve 305. An outlet pipeline 308 is provided at the output end of the shut-off hand valve 307. A remote start button 309 and a remote stop button 310 are connected to one side of the wastewater conveying pump 301 via a cable. Through the above technical solution, the wastewater transfer pump 301 provides power for the transportation of wastewater, pressurizing and transporting the filtered wastewater to the downstream treatment process. Simultaneously, the third drainage pipeline 302 connects to the output end of the wastewater transfer pump 301, serving as the channel for transporting the pressurized wastewater. The pressure gauge pipeline 303 extends from the third drainage pipeline 302, and the pressure gauge manual valve 304 controls the connection and disconnection between the pressure gauge and the pressure gauge pipeline 303, facilitating the maintenance and replacement of the pressure gauge. Furthermore, the outlet shut-off valve 305 works in conjunction with the SIS instrument controller 306. The system is used to control the opening and closing of the third drainage pipeline 302, realizing automatic control of wastewater transportation. With the help of the shut-off manual valve 307, it can serve as a backup valve. When the outlet shut-off valve 305 fails, the pipeline can be manually controlled to ensure the normal operation of the system. The outlet pipeline 308 can transport the final treated wastewater to the downstream treatment process. At the same time, the remote start button 309 and the remote stop button 310 can receive the start or stop signals from the external SIS system to remotely control the start and stop of the wastewater transfer pump 301.

[0017] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power via standard interfaces. The main controller can be any commercially available known device. There are no special restrictions on the specific models of the electrical components; any commercially available ordinary products can be selected, as long as they meet the usage requirements of this utility model.

[0018] In this invention, the working steps of the device are as follows: First, vinyl chloride gas enters water separator 1 through inlet pipeline 5 and inlet probe 4. Moisture in the gas is separated through physical action, and the separated wastewater accumulates at the bottom of water separator 1. The first drain pipeline valve 21 is opened, and the wastewater at the bottom of water separator 1 flows into sealed drainage tank 2 through the first drain pipeline 6. Simultaneously, the first pipeline manual valve 13 and the second pipeline manual valve 14 at both ends of the balancing pipeline 7 are opened to balance the gas pressure inside water separator 1 and sealed drainage tank 2, ensuring stable wastewater flow. The remote level gauge 18 monitors the wastewater level in sealed drainage tank 2 in real time and transmits the signal to the SIS level gauge 19. Pressure valve 15 controls the connection of the on-site pressure gauge 16 and the remote pressure gauge 17, allowing for on-site viewing and remote transmission of tank pressure data, thus monitoring the system status in real time. When the liquid level in sealed drainage tank 2 reaches the SIS system setting... When the set value is reached, the level gauge SIS instrument 19 sends a signal to the SIS system to open the second drain line valve 20. Wastewater flows into the filter 9 through the second drain line 8. The filter 9 filters out large particles of impurities in the wastewater. The pre-filter drain 10 periodically discharges accumulated liquid and impurities. The filtered wastewater enters the pipeline filter 11 to further remove fine impurities. Then, it is transported to the wastewater transport assembly 3 through the inlet line 12. The SIS system sends a start signal to start the wastewater transport pump 301. At the same time, the SIS instrument controller 306 controls the outlet shut-off valve 305 to open. The wastewater is pressurized and transported through the third drain line 302. The pressure gauge manual valve 304 is opened, and the transport pressure is monitored through the pressure gauge line 303. Simultaneously, the pressurized wastewater is transported to the downstream treatment process through the outlet shut-off valve 305 and the shut-off manual valve 307 via the outlet line 308.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic closed-loop drainage device for a vinyl chloride gas tank water separator in the calcium carbide production process, comprising a water separator (1), a closed-loop drainage tank (2), and a wastewater conveying assembly (3), characterized in that: The water separator (1) is detachably connected to an inlet probe (4) on one side, and a water separator inlet pipeline (5) is provided at the other end of the inlet probe (4). A first drain pipeline (6) is detachably connected to the bottom of the water separator (1), and the other end of the first drain pipeline (6) is detachably connected to the outer surface of the sealed drain tank (2). A balance pipeline (7) is provided at the upper end of the sealed drain tank (2), and the other end of the balance pipeline (7) is detachably connected to the upper end of the water separator (1). The lower end of the sealed drainage tank (2) is provided with a second drainage pipeline (8), and the other end of the second drainage pipeline (8) is detachably connected to a filter (9). The output end of the filter (9) is provided with a pre-filter shower (10), and the output end of the pre-filter shower (10) is provided with a pipeline filter (11). The output end of the pipeline filter (11) is detachably connected to an inlet pipeline (12), and the other end of the inlet pipeline (12) is detachably connected to the input end of the wastewater conveying assembly (3).

2. The automatic closed-loop drainage device for the vinyl chloride gas tank water separator in the calcium carbide production process according to claim 1, characterized in that: The balance pipeline (7) is provided with a first pipeline manual valve (13) at one end near the sealed drainage tank (2), and the balance pipeline (7) is provided with a second pipeline manual valve (14) at one end near the water separator (1).

3. The automatic closed-loop drainage device for the vinyl chloride gas tank water separator in the calcium carbide production process according to claim 2, characterized in that: A pressure valve (15) is provided on the upper end of the sealed drainage tank (2) near the first pipeline hand valve (13). The upper end of the pressure valve (15) is detachably connected to a local pressure gauge (16), and the upper end of the local pressure gauge (16) is detachably connected to a remote pressure gauge (17).

4. The automatic closed drainage device for the vinyl chloride gas tank water separator in the calcium carbide production process according to claim 1, characterized in that: The outer surface of the sealed drainage tank (2) is detachably connected to a remote level gauge (18), and a level gauge SIS instrument (19) is provided on one side of the remote level gauge (18).

5. The automatic closed-loop drainage device for the vinyl chloride gas tank water separator in the calcium carbide production process according to claim 1, characterized in that: The second drain line (8) has a detachable valve (20) on the side of its outer surface away from the filter (9).

6. The automatic closed-loop drainage device for the vinyl chloride gas tank water separator in the calcium carbide production process according to claim 1, characterized in that: The wastewater conveying assembly (3) includes a wastewater conveying pump (301). The input end of the wastewater conveying pump (301) is detachably connected to one end of the inlet pipeline (12). The output end of the wastewater conveying pump (301) is provided with a third drainage pipeline (302). A pressure gauge pipeline (303) is provided in the middle of the outer surface of the third drainage pipeline (302). The other end of the pressure gauge pipeline (303) is detachably connected to a pressure gauge hand valve (304). The other end of the third drainage pipeline (302) is provided with an outlet shut-off valve (305). A SIS instrument controller (306) is provided on one side of the outlet shut-off valve (305). A shut-off hand valve (307) is provided at the output end of the outlet shut-off valve (305). An outlet pipeline (308) is provided at the output end of the shut-off hand valve (307). A remote start button (309) and a remote stop button (310) are connected to one side of the wastewater conveying pump (301) via a cable.

7. The automatic closed-loop drainage device for the vinyl chloride gas tank water separator in the calcium carbide production process according to claim 1, characterized in that: A first drainage pipeline valve (21) is provided in the middle of the outer surface of the first drainage pipeline (6).

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