An acetylene condensate collection system

Abstract

The utility model relates to calcium carbide method acetylene technical field, concretely is a kind of acetylene condensate collection system, including acetylene main pipeline, still including steam heating unit being located in liquid collecting tank, with the acetylene recovery unit being communicated with the upper side of liquid collecting tank;The filtration conveying unit includes the import pipeline being communicated with the bottom of one side of liquid collecting tank, the first electric three-way valve being communicated with the import pipeline outlet port, two filtration branch lines being respectively communicated with the other two interfaces of first electric three-way valve, the second electric three-way valve being communicated with the outlet port of two filtration branch lines, the conveying pipe being communicated with the public end of second electric three-way valve, flow sensor being located on the pipe section of conveying pipe, audible and visual alarm and pumping mechanism;The system can recover acetylene gas in condensate water and guide back production system, improve raw material utilization, reduce cost;Winter can heat and keep warm to condensate, prevent icing outage;Condensate impurities can also be removed, effectively prevent clogging, and can realize uninterrupted filtration, with resource recovery, prevent, prevent icing function.

Description

Technical Field

[0001] This utility model relates to the field of acetylene technology using the calcium carbide method, specifically to an acetylene condensate collection system. Background Technology

[0002] After calcium carbide is processed in the generating unit and washed, the resulting crude acetylene enters the acetylene main pipeline and gas holder. The crude acetylene is then cooled in a water washing tower, pressurized by a compression unit, and further cooled in a water washing tower. It then passes through a demister at the top of the tower and enters a concentrated sulfuric acid purification tower, where it comes into direct contact with concentrated sulfuric acid to remove impurities such as hydrogen sulfide and phosphine. Next, it passes through a neutralization tower where it comes into contact with an alkaline solution to remove acidic substances. Finally, a demister at the top of the tower removes moisture from the acetylene, and the purified acetylene is sent to the vinyl chloride synthesis unit for use. Because acetylene carries some water mist during transport, some of this water mist condenses and accumulates at the lowest point of the acetylene pipeline. Prolonged accumulation can easily clog the pipeline, causing pressure fluctuations and affecting production stability.

[0003] In the prior art, the automatic condensate drainage device in an acetylene production system disclosed in Chinese Patent No. CN209548748U, although it achieves automatic discharge of condensate to the sodium hypochlorite wastewater tank through the cooperation of a water collection tank, a liquid level sensor, a control valve assembly and a drainage pump, which reduces the intensity of manual labor and the risk of environmental pollution to a certain extent, has the following problems: On the one hand, the device can only complete the collection and directional discharge of condensate, but does not recover the acetylene gas dissolved in the condensate, resulting in the waste of acetylene resources with the discharge of condensate and increasing the loss of production raw materials; on the other hand, it does not set up an impurity filtration mechanism and a low-temperature freezing protection structure in the condensate transportation process. In actual operation, impurities carried by the condensate are easy to clog the pipeline, and the condensate is easy to freeze in the low temperature environment in winter, both of which will cause the device to shut down, making it difficult to meet the requirements of acetylene production systems for resource utilization and operational stability. Utility Model Content

[0004] The purpose of this invention is to provide an acetylene condensate collection system to solve the problems of existing systems that can only collect and discharge condensate without recovering acetylene gas, resulting in resource waste, and lack impurity filtration and low-temperature anti-icing structures, which easily clog pipelines or cause equipment shutdown due to icing.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an acetylene condensate collection system, comprising an acetylene main pipeline, an acetylene condensate discharge pipeline connected to the wall of the acetylene main pipeline, a collection tank connected to the outlet port of the acetylene condensate discharge pipeline, a filtration and conveying unit connected to the bottom of one side of the collection tank, an alkaline circulation tank connected to the outlet port of the filtration and conveying unit, and a PLC controller; further comprising a steam heating unit disposed within the collection tank, and an acetylene recovery unit connected to the upper side of the collection tank and spaced apart from the acetylene condensate discharge pipeline; the outlet port of the acetylene recovery unit is connected to the wall of the acetylene main pipeline; the filtration and conveying unit includes an inlet pipeline connected to the bottom of one side of the collection tank, The system includes a first electric three-way valve connected to the outlet port of the inlet pipe, two filter branches connected to the other two ports of the first electric three-way valve, a second electric three-way valve connected to the outlet ports of the two filter branches, a delivery pipe connected to the common end of the second electric three-way valve, a flow sensor installed on the delivery pipe section, an audible and visual alarm, and a pumping mechanism connected to the outlet port of the delivery pipe. The outlet port of the pumping mechanism is connected to the inlet port of the alkali circulation tank. The first electric three-way valve and the second electric three-way valve are linked for control. The PLC controller is electrically connected to the steam heating unit, the first electric three-way valve, the second electric three-way valve, the flow sensor, the audible and visual alarm, and the pumping mechanism.

[0006] Furthermore, the filtration branch includes two first branch pipes respectively connected to the other two interfaces of the first electric three-way valve, a filter housing connected to the liquid outlet port of the first branch pipe via a flange, a stainless steel filter screen and a second activated carbon adsorption layer arranged sequentially inside the filter housing along the liquid flow direction, and a second branch pipe connected to the liquid outlet port of the filter housing via a flange; the liquid outlet ports of the two second branch pipes are respectively connected to the two interfaces of the second electric three-way valve.

[0007] Furthermore, the outer wall of the collection tank is equipped with a liquid level sensor; the pumping mechanism includes a water pump connected to the liquid outlet port of the delivery pipe, an outlet pipe connected to the water pump, and a manual regulating valve installed on the outlet pipe section; the liquid outlet port of the outlet pipe is connected to the liquid inlet port of the alkali circulation tank; the water pump and the liquid level sensor are both electrically connected to the PLC controller.

[0008] Furthermore, the steam heating unit includes a coil inside the collection tank, a steam inlet pipe and a steam outlet pipe that are respectively connected to the inlet port and outlet port of the coil and extend to the outside of the collection tank, an electric regulating valve located on the steam inlet pipe section and outside the collection tank, a steam trap located on the steam outlet pipe section and outside the collection tank, and a temperature sensor located on the inner wall of the collection tank; the temperature sensor and the electric regulating valve are both electrically connected to the PLC controller.

[0009] Furthermore, the acetylene recovery unit includes a sealed outer shell connected to the upper side of the collection tank, a perforated plate and multiple baffles arranged vertically at intervals inside the sealed outer shell, a first activated carbon adsorption layer located inside the sealed outer shell and above the perforated plate, and a return pipe connected to the upper side of the sealed outer shell and to the wall of the acetylene main pipeline; the multiple baffles are located above the perforated plate, and adjacent baffles are arranged alternately to form an S-shaped airflow channel; a one-way valve and a pressure regulating valve are connected in series on the return pipe.

[0010] Furthermore, a sight glass is provided on the section of the acetylene condensate discharge pipeline.

[0011] Furthermore, a pressure sensor is provided on the upper side of the liquid collection tank, and the pressure sensor is electrically connected to the PLC controller.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model's acetylene condensate collection system can recover dissolved and volatilized acetylene gas from the condensate through an acetylene recovery unit, allowing the acetylene resource to be reintroduced into the production system. This solves the resource waste problem caused by acetylene being discharged with the condensate in existing equipment, improving raw material utilization and reducing production costs. Furthermore, with the help of a steam heating unit, the condensate can be heated and kept warm in low-temperature environments during winter, preventing equipment shutdowns caused by condensate freezing and avoiding the risk of operational interruptions due to condensate freezing. In addition, the dual-filtration branch design in the filtration and conveying unit can remove solid impurities and harmful components from the condensate, preventing impurities from clogging the pipeline. At the same time, the linkage control of the first and second electric three-way valves can achieve uninterrupted filtration, ensuring stable operation of the device. This makes the device capable of resource recovery, anti-clogging, and anti-icing functions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the acetylene condensate collection system of this utility model; Figure 2 This is an enlarged schematic diagram of the acetylene recovery unit of this utility model; Figure 3 This is an enlarged cross-sectional schematic diagram of the filter branch of this utility model.

[0014] In the diagram: 1. Acetylene main pipeline; 2. Acetylene condensate discharge pipeline; 3. Sight glass; 4. Collection tank; 5. Filter branch; 6. Water pump; 7. Outlet pipeline; 8. Manual regulating valve; 9. Alkali circulation tank; 10. Steam inlet pipeline; 11. Delivery pipe; 12. Drain valve; 13. Electric regulating valve; 14. Coil; 15. Temperature sensor; 16. Liquid level sensor; 17. Acetylene recovery unit; 18. Return pipe; 19. Pressure sensor; 20. Sealing housing; 21. Second electric three-way valve; 22. Mesh plate; 23. First activated carbon adsorption layer; 24. Baffle plate; 25. Inlet pipeline; 26. First electric three-way valve; 27. First branch pipe; 28. Filter housing; 29. ​​Stainless steel filter screen; 30. Second activated carbon adsorption layer; 31. Second branch pipe; 32. Flow sensor; 33. PLC controller; 34. Audible and visual alarm; 35. Steam outlet pipeline. Detailed Implementation

[0015] Please see Figure 1-3 An acetylene condensate collection system includes an acetylene main pipeline 1, an acetylene condensate discharge pipeline 2 connected to the wall of the acetylene main pipeline 1, a collection tank 4 connected to the outlet port of the acetylene condensate discharge pipeline 2, a filtration and conveying unit connected to the bottom of one side of the collection tank 4, an alkaline circulation tank 9 connected to the outlet port of the filtration and conveying unit, and a PLC controller 33. It also includes a steam heating unit located within the collection tank 4, and acetylene recovery units 17 connected to the upper side of the collection tank 4 and spaced apart from the acetylene condensate discharge pipeline 2. The outlet port of the acetylene recovery unit 17 is connected to the wall of the acetylene main pipeline 1. The filtration and conveying unit includes an inlet pipe 25 connected to the bottom of one side of the collection tank 4, and a first electric motor connected to the outlet port of the inlet pipe 25. The system includes a three-way valve 26, two filter branches 5 connected to the other two interfaces of the first electric three-way valve 26, a second electric three-way valve 21 connected to the outlet ports of the two filter branches 5, a delivery pipe 11 connected to the common end of the second electric three-way valve 21, a flow sensor 32 installed on the pipe section of the delivery pipe 11, an audible and visual alarm 34, and a pumping mechanism connected to the outlet port of the delivery pipe 11. The outlet port of the pumping mechanism is connected to the inlet port of the alkaline circulation tank 9. The first electric three-way valve 26 and the second electric three-way valve 21 are linked for control. The PLC controller 33 is electrically connected to the steam heating unit, the first electric three-way valve 26, the second electric three-way valve 21, the flow sensor 32, the audible and visual alarm 34, and the pumping mechanism.

[0016] This application further proposes that the filter branch 5 includes two first branch pipes 27 that are respectively connected to the other two interfaces of the first electric three-way valve 26, a filter housing 28 connected to the liquid outlet port of the first branch pipe 27 through a flange, a stainless steel filter screen 29 and a second activated carbon adsorption layer 30 arranged sequentially inside the filter housing 28 along the liquid flow direction, and a second branch pipe 31 connected to the liquid outlet port of the filter housing 28 through a flange; the liquid outlet ports of the two second branch pipes 31 are respectively connected to the two interfaces of the second electric three-way valve 21.

[0017] One end of each of the two first branch pipes 27 is sealed to the other two ports of the first electric three-way valve 26 via flanges, thereby diverting condensate from the inlet pipe 25 through the first electric three-way valve 26 to the two filter branches 5. The other end of each first branch pipe 27 is securely connected to the inlet port of the corresponding filter housing 28 via flanges, and chemically resistant gaskets (such as fluororubber gaskets) are installed at the flange connections to prevent condensate leakage. Inside the filter housing 28, a stainless steel filter screen 29 and a second activated carbon adsorption layer are arranged sequentially along the condensate flow direction. The stainless steel filter screen 29 is fixed to the filter housing 28 near the inlet port via an annular groove. On the other side, the second activated carbon adsorption layer 30 is filled in the porous support plate inside the filter housing 28, and a buffer gap of 30-50mm is reserved between the two to ensure that the liquid first passes through the filter screen to intercept impurities and then passes through the activated carbon to adsorb harmful components; the liquid outlet port of the filter housing 28 is connected to one end of the second branch pipe 31 through a flange, and the other ends of the two second branch pipes 31 are respectively connected to the two interfaces of the second electric three-way valve 21 through flanges; the stainless steel filter screen 29 is a 50-80 mesh metal woven mesh, the second activated carbon adsorption layer 30 is columnar activated carbon with a particle size of 2-5mm, and the first activated carbon adsorption layer 23 is coconut shell activated carbon with a particle size of 1-3mm.

[0018] Specifically, the stainless steel filter screen 29 can intercept solid impurities such as carbide slag and metal fragments carried in the condensate, while the second activated carbon adsorption layer 30 can adsorb harmful components such as sulfides and phosphine. This dual purification ensures the purity of the condensate delivered to the alkali circulation tank 9, preventing impurities from contaminating the alkali solution or clogging subsequent pipelines. All components are connected by flanges, and the filter housing 28 is a detachable structure. When replacing the stainless steel filter screen 29 or the second activated carbon adsorption layer 30 in the future, only the flange needs to be disassembled to open the filter housing 28, making the operation convenient and reducing maintenance time and costs.

[0019] This application further proposes that a liquid level sensor 16 is provided on the outer wall of the collection tank 4; the pumping mechanism includes a water pump 6 connected to the liquid outlet port of the delivery pipe 11, an outlet pipe 7 connected to the water pump 6, and a manual regulating valve 8 provided on the pipe section of the outlet pipe 7; the liquid outlet port of the outlet pipe 7 is connected to the liquid inlet port of the alkali circulation tank 9; the water pump 6 and the liquid level sensor 16 are both electrically connected to the PLC controller 33.

[0020] The liquid level sensor 16 is fixed to the middle of the outer wall of the collection tank 4 using a side-mounted flange connection. Its measuring end penetrates the tank wall and extends into the inside of the collection tank 4, directly contacting the condensate inside the tank, and can collect liquid level data in real time. The signal output end of the liquid level sensor 16 is electrically connected to the signal input end of the PLC controller 33 through a shielded cable to realize the real-time transmission of liquid level data. The inlet of the water pump 6 is sealed to the outlet port of the delivery pipe 11 through a flange. The outlet of the water pump 6 is connected to one end of the outlet pipe 7 through a flange. A manual regulating valve 8 is fixedly installed on the pipe section of the outlet pipe 7 through a flange. The other end of the outlet pipe 7 is sealed to the inlet port of the alkaline circulation tank 9 through a flange. The control end of the water pump 6 is electrically connected to the signal output end of the PLC controller 33 through a cable.

[0021] Specifically, the liquid level sensor 16 monitors the liquid level of the condensate in the collection tank 4 in real time and feeds it back to the PLC controller 33. When the liquid level reaches the preset high level, the PLC controller 33 automatically starts the water pump 6 to transport the condensate. When the liquid level drops to the preset low level, the water pump 6 is automatically stopped to prevent the water pump 6 from running dry and being damaged due to excessively high or low liquid levels in the tank, thus ensuring the safe operation of the equipment. The manual regulating valve 8 on the outlet pipe 7 can flexibly adjust the flow rate according to the alkali preparation requirements of the alkali circulation tank 9 to ensure the stability of the alkali concentration in the subsequent alkali preparation process and improve product quality.

[0022] This application further proposes that the steam heating unit includes a coil 14 located inside the liquid collection tank 4, a steam inlet pipe 10 and a steam outlet pipe 35 respectively connected to the inlet port and outlet port of the coil 14 and extending to the outside of the liquid collection tank 4, an electric regulating valve 13 located on the pipe section of the steam inlet pipe 10 and outside the liquid collection tank 4, a drain valve 12 located on the pipe section of the steam outlet pipe 35 and outside the liquid collection tank 4, and a temperature sensor 15 located on the inner wall of the liquid collection tank 4; the temperature sensor 15 and the electric regulating valve 13 are both electrically connected to the PLC controller 33.

[0023] The coil 14, using a U-shaped or spiral structure, is fixedly installed inside the lower side of the collection tank 4 via a bracket, ensuring full contact between the coil 14 wall and the condensate inside the tank. The inlet port of the coil 14 is welded to one end of the steam inlet pipe 10, and the other end of the steam inlet pipe 10 extends through the tank wall of the collection tank 4 to the outside, with the penetration point sealed by welding. An electric regulating valve 13 is fixedly installed on the section of the steam inlet pipe 10 located outside the collection tank 4 via a flange. The outlet port of the coil 14 is connected to one end of the steam outlet pipe 35. The steam outlet pipe 35 is welded to the other end, and the other end of the steam outlet pipe 35 also extends to the outside through the wall of the collection tank 4. The drain valve 12 is fixedly installed on the pipe section located outside the collection tank 4 by a flange. The temperature sensor 15 is fixed to the middle position of the inner wall of the collection tank 4 by a threaded connection, and the sensor detection end is completely immersed in the condensate in the tank. The signal output end of the temperature sensor 15 is electrically connected to the signal input end of the PLC controller 33 through a shielded cable. The control end of the electric regulating valve 13 is also electrically connected to the signal output end of the PLC controller 33 through a cable.

[0024] Specifically, the coil 14 increases the contact area with the condensate, allowing steam heat to be efficiently transferred to the condensate and avoiding icing problems caused by uneven local heating. This is especially suitable for low-temperature environments in winter, ensuring continuous operation of the device. When the temperature sensor 15 detects that the temperature of the condensate in the tank is lower than the preset value (e.g., 5°C), the PLC controller 33 automatically controls the electric regulating valve 13 to open wider to increase the steam supply. When the temperature rises to the preset value (e.g., 10°C), the valve closes to control the heating intensity and avoid steam waste. The steam trap 12 on the steam outlet pipe 35 can promptly drain the condensate generated in the coil 14, preventing condensate retention from affecting steam heat transfer efficiency and further reducing steam consumption.

[0025] This application further proposes that the acetylene recovery unit 17 includes a sealed outer shell 20 connected to the upper side of the collection tank 4, a perforated plate 22 and a plurality of baffles 24 arranged vertically and spaced apart inside the sealed outer shell 20, a first activated carbon adsorption layer 23 located inside the sealed outer shell 20 and above the perforated plate 22, and a return pipe 18 connected to the upper side of the sealed outer shell 20 and to the wall of the acetylene main pipeline 1; the plurality of baffles 24 are located above the perforated plate 22, and adjacent baffles 24 are arranged alternately to form an S-shaped airflow channel; a one-way valve and a pressure regulating valve are connected in series on the return pipe 18.

[0026] The perforated plate 22 is fixed to the annular groove on the inner wall of the sealing shell 20 by bolts. Multiple baffles 24 are welded to the inner wall of the sealing shell 20 and located above the perforated plate 22. The first activated carbon adsorption layer 23 is filled in the preset limiting frame on the inner wall of the sealing shell 20, and the bottom of the limiting frame is attached to the upper side of the perforated plate 22. The upper port of the sealing shell 20 is fixedly connected to one end of the return pipe 18 by welding. The other end of the return pipe 18 is connected to the pipe wall of the acetylene main pipeline 1 through a flange. A one-way valve and a pressure regulating valve are connected in series along the airflow direction on the return pipe 18 section. The valve body of the one-way valve is connected to the return pipe 18 by threaded sealing, and the pressure regulating valve is fixed to the return pipe 18 through a flange.

[0027] Specifically, the first activated carbon adsorption layer 23 can adsorb impurities such as residual sulfides and phosphine in acetylene gas, ensuring the purity of acetylene gas recovered to the acetylene main pipeline 1 and avoiding impurities from affecting the quality of subsequent vinyl chloride synthesis; the one-way valve on the return pipe 18 can prevent high-pressure gas in the acetylene main pipeline 1 from flowing back into the sealed shell 20, and the pressure regulating valve can stabilize the pressure in the recovery unit within a safe range.

[0028] This application further proposes that a sight glass 3 be installed on the section of the acetylene condensate discharge pipeline 2.

[0029] Specifically, sight glass 3 is fixedly installed on the section of acetylene condensate drain pipe 2 using a flange connection, and the installation position of sight glass 3 is located in the middle area of ​​acetylene condensate drain pipe 2 between the main acetylene pipe 1 and the collection tank 4; the flanges at both ends of sight glass 3 are respectively fastened to the flanges of the corresponding pipe sections of acetylene condensate drain pipe 2 by bolts, and corrosion-resistant sealing gaskets (such as polytetrafluoroethylene gaskets) are installed at the flange connections to ensure that the pipe is sealed and does not leak; the observation window of sight glass 3 is made of high borosilicate glass, and the axis of the window is consistent with the axis of acetylene condensate drain pipe 2, so that the operator can directly observe the flow status of the condensate in the pipe through the observation window.

[0030] This application further proposes that a pressure sensor 19 is provided on the upper side of the liquid collection tank 4, and the pressure sensor 19 is electrically connected to the PLC controller 33.

[0031] The pressure sensor 19 is fixedly installed on the upper wall of the liquid collection tank 4 using a flange connection or a threaded connection. The detection end of the pressure sensor 19 penetrates the tank wall and extends into the interior of the liquid collection tank 4, directly contacting the gas phase space inside the tank to collect the pressure data inside the tank in real time. The signal output end of the pressure sensor 19 is electrically connected to the signal input end of the PLC controller 33 through a shielded cable. A safety valve is provided on the top of the liquid collection tank 4 to release pressure.

[0032] Specifically, the pressure sensor 19 directly detects the gas phase pressure inside the liquid collection tank 4, reducing the safety risks caused by excessive pressure; when the pressure exceeds the preset safety threshold, the PLC controller 33 can immediately trigger the audible and visual alarm 34 to remind the operator to troubleshoot the fault in time.

[0033] Working process and principle: When the acetylene condensate collection system is running, firstly, the condensate formed by the water mist carried by the acetylene gas in the main acetylene pipeline 1 flows by gravity into the collection tank 4 through the acetylene condensate drain pipe 2. The operator can observe the flow of condensate and the pipe blockage in real time through the sight glass 3 on the pipeline. The liquid level sensor 16 on the outer wall of the collection tank 4 and the temperature sensor 15 on the inner wall monitor the liquid level and temperature of the condensate in the tank in real time and transmit the data to the PLC controller 33. When the temperature sensor 15 detects that the liquid temperature inside the tank is lower than the preset value (e.g., 5°C), the PLC controller 33 controls the electric regulating valve 13 of the steam heating unit to open wider. Steam enters the coil 14 inside the collection tank 4 through the steam inlet pipe 10 to heat and keep the condensate warm, preventing it from freezing at low temperatures. The condensate produced after heating is discharged through the steam outlet pipe 35 and the drain valve 12, reducing steam consumption. When the liquid level sensor 16 detects that the liquid level inside the tank has reached the preset high liquid level, the PLC controller 33 starts the water pump 6 of the filter conveying unit and simultaneously controls the first electric three-way valve 26 and the second electric three-way valve 21 to switch to one of the filter branches 5. The condensate in the collection tank 4 enters the corresponding first branch pipe through the inlet pipe 25 and the first electric three-way valve 26. 27. The condensate then flows into the filter housing 28 and passes through the stainless steel filter screen 29 (intercepting solid impurities) and the second activated carbon adsorption layer 30 (adsorbing harmful components such as sulfides) for filtration and purification. The purified condensate then enters the delivery pipe 11 through the second branch pipe 31 and the second electric three-way valve 21. The flow sensor 32 on the delivery pipe 11 monitors the flow rate in real time. If the flow rate is lower than the preset threshold, it is determined that the corresponding filtration branch 5 is blocked. The PLC controller 33 immediately triggers the audible and visual alarm 34 and controls the first electric three-way valve 26 and the second electric three-way valve 21 to switch to another filtration branch 5 in a synchronous manner to achieve uninterrupted filtration. The filtered condensate is then pumped through the water pump 6 and the outlet pipe 7 (the flow rate can be finely adjusted by the manual adjustment valve 8) and finally delivered to the alkali circulation tank 9 for alkali preparation. During this process, trace amounts of acetylene gas volatilized in the collection tank 4 enter the sealed outer shell 20 of the acetylene recovery unit 17. The gas is first initially intercepted by the perforated plate 22, and then purified by the first activated carbon adsorption layer 23. Simultaneously, the purification time is extended by the baffles 24, which are arranged in an S-shaped airflow channel. The droplets, due to inertia, impact the baffles and fall, returning to the acetylene main pipeline 1 via the return pipe 18 for recycling. A one-way valve on the return pipe 18 prevents backflow of acetylene gas into the main pipeline, while a pressure regulating valve stabilizes the pressure within the recovery unit within a safe range (e.g., 0.05-0.1 MPa). Meanwhile, the pressure sensor 19 on the upper side of the collection tank 4 monitors the pressure inside the tank in real time and transmits the data to the PLC controller 33, ensuring the overall safe and stable operation of the device. This completes the entire process of collecting, purifying, recovering, and reusing acetylene condensate.

[0034] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An acetylene condensate collection system, comprising an acetylene main pipeline (1), an acetylene condensate discharge pipeline (2) connected to the wall of the acetylene main pipeline (1), a collection tank (4) connected to the outlet port of the acetylene condensate discharge pipeline (2), a filtration and conveying unit connected to the bottom of one side of the collection tank (4), an alkaline circulation tank (9) connected to the outlet port of the filtration and conveying unit, and a PLC controller (33), characterized in that, It also includes a steam heating unit located in the collection tank (4), and an acetylene recovery unit (17) connected to the upper side of the collection tank (4) and spaced apart from the acetylene condensate drain pipe (2); the outlet port of the acetylene recovery unit (17) is connected to the pipe wall of the acetylene main pipe (1); the filtration and conveying unit includes an inlet pipe (25) connected to the bottom of one side of the collection tank (4), a first electric three-way valve (26) connected to the outlet port of the inlet pipe (25), two filtration branches (5) connected to the other two interfaces of the first electric three-way valve (26), and a second electric three-way valve (21) connected to the outlet ports of the two filtration branches (5). The system includes a delivery pipe (11) connected to the common end of the second electric three-way valve (21), a flow sensor (32) installed on the pipe section of the delivery pipe (11), an audible and visual alarm (34), and a pumping mechanism connected to the liquid outlet port of the delivery pipe (11). The liquid outlet port of the pumping mechanism is connected to the liquid inlet port of the alkaline circulation tank (9). The first electric three-way valve (26) and the second electric three-way valve (21) are linked and controlled. The PLC controller (33) is electrically connected to the steam heating unit, the first electric three-way valve (26), the second electric three-way valve (21), the flow sensor (32), the audible and visual alarm (34), and the pumping mechanism.

2. The acetylene condensate collection system according to claim 1, characterized in that, The filter branch (5) includes two first branch pipes (27) that are respectively connected to the other two interfaces of the first electric three-way valve (26), a filter housing (28) connected to the liquid outlet port of the first branch pipe (27) through a flange, a stainless steel filter screen (29) arranged inside the filter housing (28) and arranged in sequence along the liquid flow direction, and a second activated carbon adsorption layer (30), and a second branch pipe (31) connected to the liquid outlet port of the filter housing (28) through a flange; the liquid outlet ports of the two second branch pipes (31) are respectively connected to the two interfaces of the second electric three-way valve (21).

3. The acetylene condensate collection system of claim 1, wherein, The outer wall of the collection tank (4) is equipped with a liquid level sensor (16); the pumping mechanism includes a water pump (6) connected to the outlet port of the delivery pipe (11), an outlet pipe (7) connected to the water pump (6), and a manual regulating valve (8) provided on the pipe section of the outlet pipe (7); the outlet port of the outlet pipe (7) is connected to the inlet port of the alkaline circulation tank (9); the water pump (6) and the liquid level sensor (16) are both electrically connected to the PLC controller (33).

4. The acetylene condensate collection system of claim 1, wherein, The steam heating unit includes a coil (14) inside the collection tank (4), a steam inlet pipe (10) and a steam outlet pipe (35) that are connected to the inlet and outlet ports of the coil (14) and extend to the outside of the collection tank (4), an electric regulating valve (13) located on the section of the steam inlet pipe (10) and outside the collection tank (4), a drain valve (12) located on the section of the steam outlet pipe (35) and outside the collection tank (4), and a temperature sensor (15) located on the inner wall of the collection tank (4); the temperature sensor (15) and the electric regulating valve (13) are both electrically connected to the PLC controller (33).

5. The acetylene condensate collection system of claim 1, wherein, The acetylene recovery unit (17) includes a sealed outer shell (20) connected to the upper side of the collection tank (4), a perforated plate (22) arranged vertically and spaced apart inside the sealed outer shell (20), a plurality of baffles (24), a first activated carbon adsorption layer (23) located inside the sealed outer shell (20) and above the perforated plate (22), and a return pipe (18) connected to the upper side of the sealed outer shell (20) and the wall of the acetylene main pipeline (1); the plurality of baffles (24) are located above the perforated plate (22), and adjacent baffles (24) are arranged in an alternating manner to form an S-shaped airflow channel; a one-way valve and a pressure regulating valve are connected in series on the return pipe (18).

6. The acetylene condensate collection system according to claim 1, characterized in that, The acetylene condensate discharge pipeline (2) is equipped with a sight glass (3) on the pipeline section.

7. The acetylene condensate collection system according to claim 1, characterized in that, A pressure sensor (19) is provided on the upper side of the liquid collection tank (4), and the pressure sensor (19) is electrically connected to the PLC controller (33).

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