Electric oil trap easy to clean

Abstract

The invention discloses an easy-to-clean electric catching oil remover, and particularly relates to the technical field of rubber additive product industrial waste gas treatment, the easy-to-clean electric catching oil remover comprises an electric catching oil remover support, a cleaning water tank support, a low-pressure nitrogen end, an oil-containing waste gas end, a low-pressure steam end, a water source end, a waste water end and a purified waste gas treatment device; in the cleaning stage, steam is introduced into the low-pressure steam end to heat water in the cleaning water tank main body, and meanwhile, the water source end conveys a water source to form cleaning liquid; cleaning liquid uniformly washes accumulated oil on the surface of a honeycomb electrode tube through a washing spraying opening which is made of a stainless steel material and has a nozzle aperture of 1mm and a spraying angle of 120 degrees downwards in a rotary spraying manner, and the uniform and powerful spraying manner can thoroughly remove oil stains on the surface of an electrode, so that electrode blockage caused by oil stain residues is avoided, and the service life of the electrode tube is prolonged. And the whole cleaning process does not need to be stopped, so that the accumulated oil of the honeycomb electrode can be cleaned on line without stopping, the continuous and efficient operation of the electric capturing oil remover is ensured, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment in the rubber additive product industry, and more particularly to an easy-to-clean electric precipitator oil remover. Background Art

[0002] In the rubber additive products industry, the treatment of rubber additive granulation exhaust gas has always been a key problem faced by the industry. The composition of rubber additive granulation exhaust gas is complex, containing high-boiling point organic matter such as plasticizers and antioxidants. These substances can easily form viscous oil mist after the exhaust gas is cooled. This viscous oil mist has unique physical and chemical properties. It is not only highly viscous, but also easily cokes on the electric capture plate.

[0003] At present, traditional electrostatic precipitators have frequent problems when treating this type of exhaust gas: the accumulated oil is difficult to clean, and due to its strong adhesion, the machine needs to be shut down and disassembled for cleaning, which takes more than 8 hours, affecting production continuity and increasing costs; the wet electrostatic precipitator is severely scaled, and the spray water and tar form an emulsion that blocks the nozzle and pipeline, and the oil removal efficiency decreases significantly with the operating time; the oil-water separation effect is poor, the separation box lacks a heating function, and high-viscosity oil solidifies at low temperatures and blocks the oil drain port, affecting the separation effect and stable operation of the system. For this reason, we propose an easy-to-clean electrostatic precipitator. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an easy-to-clean electric precipitator to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an easy-to-clean electric precipitator oil remover, comprising an electric precipitator oil remover bracket, a cleaning water tank bracket, a low-pressure nitrogen end, an oily waste gas end, a low-pressure steam end, a water source end, a waste water end, and a waste gas purification treatment device; The electric precipitator oil remover bracket is used to stabilize the electric precipitator oil remover body; The tower body contains the core area for processing exhaust gas; Electrode weight, which is set inside the tower body; Honeycomb electrode tube, which is located in the upper middle part of the tower body and adopts a hexagonal honeycomb structure; Low-pressure steam purge port, located at the upper part of the tower body, is used for online cleaning of oil accumulation on the honeycomb electrode tube; The electrode generator is connected to the honeycomb electrode tube and is used for ionization and capture of oil mist; Flushing spray port: The flushing spray port is located at the upper part of the tower body and is connected to the flushing circulation pump. It is used to deeply clean the honeycomb electrode tube with a degreasing agent. Nitrogen protection intervention port, which is located at the top of the tower body and is used to introduce low-pressure nitrogen; Cleaning water tank device: includes cleaning water tank bracket, flushing water circulation outlet, cleaning water tank body, cleaning water tank water source inlet, degreasing agent adding device, temperature sensor inlet, vent, low-pressure steam inlet and maintenance observation hole.

[0006] Preferably, an inspection port is provided at the bottom of the tower body for inspection and maintenance by staff.

[0007] Preferably, a flushing drain outlet and a drain outlet are respectively provided at the bottom of the tower body. The flushing drain outlet is used to discharge the oily wastewater generated during the flushing process, and the drain outlet is used to regularly discharge the sediment in the cleaning water tank. The flushing drain outlet and the drain outlet are both connected to the external pipeline through a flange structure.

[0008] Preferably, a maintenance ladder and guardrail are provided on one side of the tower body. The maintenance ladder is made of carbon steel and is in the form of a straight ladder. It is used for workers to climb to the top of the tower body for maintenance. The guardrail is provided around the tower body and on the maintenance platform for safety protection.

[0009] Preferably, an oily waste gas source inlet is provided at the bottom of the side of the tower body for introducing the oily waste gas to be treated, and a purified waste gas outlet is provided at the top of the tower body for discharging the treated clean gas.

[0010] Preferably, the cleaning water tank body is fixed to the ground through a cleaning water tank bracket, the cleaning water tank water source inlet is connected to the flushing circulation pump to form a closed circulating water system, and the temperature sensor inlet is used to monitor the water temperature in the water tank.

[0011] Preferably, the vent is used to discharge excess gas in the cleaning water tank body, and the low-pressure steam inlet is used to introduce steam to heat the cleaning water tank body.

[0012] Preferably, the embedded structure of the inspection observation hole is provided on the side of the tower body for observing the internal operation of the tower body.

[0013] Preferably, the low-pressure nitrogen end is introduced into the top of the tower body through a nitrogen protection introduction port.

[0014] Preferably, the low-pressure steam is introduced into the upper part of the tower body through a low-pressure steam purge port.

[0015] Technical effects and advantages of the present invention: 1. When the present invention is in use, during the cleaning stage, steam is introduced from the low-pressure steam end to heat the water in the cleaning water tank body, and at the same time, water is transported from the water source end to form a cleaning liquid. After the circulation pump is started, the cleaning liquid passes through a specially designed flushing spray nozzle (stainless steel material, nozzle aperture 1mm, spray angle 120° downward) to evenly flush the accumulated oil on the surface of the honeycomb electrode tube with a rotating spray effect. This uniform and powerful spraying method can thoroughly remove the oil on the electrode surface and avoid electrode clogging caused by residual oil. The entire cleaning process does not require shutdown, realizing the online cleaning of honeycomb electrode oil without stopping the machine, ensuring the continuous and efficient operation of the electric precipitator, and improving production efficiency.

[0016] 2. When the present invention is in use, the oily wastewater generated during the cleaning process flows back to the main cleaning water tank through the flushing drain port, and then enters the inclined plate bin for oil-water separation. By extending the residence time (≥30 minutes), the oil and water are fully separated. Even high-viscosity floating oil with a viscosity greater than 500 cP can overflow into the oil collection tank, while clean water returns to the spray system through the flushing water circulation outlet for recycling. This process effectively solves the difficult problem of emulsification and separation of high-viscosity tar and water, not only reducing the waste of water resources, but also lowering the cost of wastewater treatment, reflecting the environmental protection and economic efficiency of the device. At the same time, the development of steam-deoiling agent synergistic cleaning technology to dissolve siloxane polymers further enhances the cleaning effect and helps to better achieve oil-water separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the electric precipitator oil remover of the present invention.

[0019] Figure 3 It is a schematic diagram of the cleaning water tank device of the present invention.

[0020] The accompanying drawings are marked as follows: 1. Electrostatic precipitator bracket; 2. Flushing outlet; 3. Tower body; 4. Maintenance port; 5. Electrode weight; 6. Honeycomb electrode tube; 7. Low-pressure steam purge port; 8. Guardrail; 9. Electrode generator; 10. Oily waste gas source inlet; 11. Maintenance ladder; 12. Flushing spray port; 13. Nitrogen protection intervention port; 14. Purified waste gas outlet; 15. Cleaning water tank bracket; 16. Flushing water circulation outlet; 17. Cleaning water tank body; 18. Cleaning water tank water source inlet; 19. Degreasing agent adding device; 20. Drain port; 21. Temperature sensor access port; 22. Vent port; 23. Low-pressure steam access port; 24. Maintenance observation hole; 101. Low-pressure nitrogen terminal; 102. Oily waste gas terminal; 103. Low-pressure steam terminal; 104. Water source terminal; 105. Wastewater terminal; 106. Purified waste gas treatment device. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] As attached Figure 1-Figure 3 The easy-to-clean electric precipitator oil remover shown in the figure includes an electric precipitator oil remover bracket 1, a cleaning water tank bracket 15, a low-pressure nitrogen terminal 101, an oily waste gas terminal 102, a low-pressure steam terminal 103, a water source terminal 104, a waste water terminal 105 and a purified waste gas treatment device 106; The electric precipitator bracket 1 is used to stabilize the electric precipitator body; the tower body 3, which contains the core area for treating exhaust gas; the electrode weight 5, which is arranged inside the tower body 3; the honeycomb electrode tube 6, which is located in the middle and upper part of the tower body 3 and adopts a hexagonal honeycomb structure; the low-pressure steam purge port 7, which is located in the upper part of the tower body 3 and is used for online cleaning of the accumulated oil on the honeycomb electrode tube 6; the electrode generator 9, which is connected to the honeycomb electrode The tower body 3 is connected to the electrode tube 6 for ionization and capture of oil mist; the flushing spray port 12 is located at the upper part of the tower body 3 and is connected to the flushing circulation pump for deep cleaning of the honeycomb electrode tube 6 with a degreasing agent; the nitrogen protection intervention port 13 is located at the top of the tower body 3 and is used to introduce a low-pressure nitrogen terminal 101; the bottom of the tower body 3 is provided with an inspection port 4 for staff to carry out inspection and maintenance; one side of the tower body 3 is provided with an inspection ladder 11 and a guardrail 8, The maintenance ladder 11 is made of carbon steel and is in the form of a straight ladder, which is used by workers to climb to the top of the tower body 3 for maintenance. Guardrails 8 are set around the tower body 3 and on the maintenance platform for safety protection. An oily waste gas source inlet 10 is provided at the bottom of the side of the tower body 3 for introducing the oily waste gas end 102 to be treated, and a purified waste gas outlet 14 is provided at the top of the tower body 3 for discharging the treated clean gas; the low-pressure nitrogen end 101 is introduced into the top of the tower body 3 through the nitrogen protection intervention port 13; the low-pressure steam end 103 is introduced into the upper part of the tower body 3 through the low-pressure steam purge port 7; the electrostatic precipitator oil remover bracket 1 is used as the basic support structure of the entire device. It adopts the form of steel structure and is carefully made according to the site height and layout to provide a stable installation position for the electrostatic precipitator body. The cleaning water tank bracket 15 is also fixed to the ground in the form of steel structure to ensure that the water tank remains stable during operation. The two together constitute the physical support system of the device, laying the foundation for the normal operation of subsequent components. Cleaning water tank device: including cleaning water tank bracket 15, flushing water circulation outlet 16, cleaning water tank body 17, cleaning water tank water source inlet 18, degreasing agent adding device 19, temperature sensor inlet 21, vent 22, low-pressure steam inlet 23 and inspection observation hole 24; The bottom of the tower body 3 is provided with a flushing drain port 2 and a drain port 20. The flushing drain port 2 is used to discharge the oily wastewater generated during the flushing process, and the drain port 20 is used to regularly discharge the sediment in the cleaning water tank. The flushing drain port 2 and the drain port 20 are both connected to the external pipeline through a flange structure. The cleaning water tank body 17 is fixed to the ground through the cleaning water tank bracket 15. The cleaning water tank water source inlet 18 is connected to the flushing circulation pump to form a closed circulating water system. The temperature sensor inlet 21 is used to monitor the water temperature in the water tank; the vent 22 is used to discharge excess gas in the cleaning water tank body 17, and the low-pressure steam inlet 23 is used to introduce steam to heat the cleaning water tank body 17; the inspection observation hole 24 is embedded in the side of the tower body 3 for observing the internal operation of the tower body 3; The flushing spray port 12 is located at the upper part of the tower body 3 and is connected to the flushing circulation pump. It is also made of stainless steel, has a nozzle aperture of 1mm, and a spray angle of 120° downward. During the cleaning stage, after the circulation pump is started, the cleaning liquid is sprayed through the flushing spray port 12 at a specific angle and nozzle aperture, forming a rotating spray effect, evenly flushing the accumulated oil on the surface of the honeycomb electrode tube 6. This uniform and powerful spraying method can completely remove the oil on the electrode surface, avoiding oil residue that may cause electrode clogging, and also prevent oil from entering the subsequent spray pipes and circulation system and causing clogging. Electrostatic precipitator bracket 1: steel structure, made according to the site height and layout; flushing outlet 2: located at the bottom of the tower, after circulating spray washing and steam purging, the oil enters the conical flushing outlet 2 and flows to the automatic circulating washing system by gravity; tower body 3: steel structure; maintenance port 4: quick-release cover mode; electrode weight 5: ceramic material, relying on its own weight to maintain the electrode wire in the center of the anode tube; honeycomb electrode tube 6: hexagonal honeycomb structure, oil capture area; low-pressure steam purge port 7: stainless steel material, nozzle aperture 1mm, spray angle downward 120°; guardrail 8: maintenance safety guardrail 8; electrode generator 9: provides high-voltage electrode power supply; oil-containing waste gas source inlet 10: flange docking structure; maintenance ladder 11: carbon steel material, straight ladder form; flushing spray port 12: stainless steel material, nozzle aperture 1 mm, spray angle downward 120°; nitrogen protection intervention port 13: stainless steel material, quick joint, spray angle downward 120°; purified exhaust gas outlet 14: flange docking structure; cleaning water tank bracket 15: steel structure bracket; flushing water circulation outlet 16: flange structure, docking circulation spray pipe and flushing water pump; cleaning water tank body 17: steel structure, water tank body; cleaning water tank water source inlet 18: flange docking structure; degreaser adding device 19: flange docking structure, external degreaser adding device 19; sewage outlet 20: flange docking structure, external drainage pipe; temperature sensor inlet 21: flange docking structure, external temperature sensor; vent port 22: flange docking structure; low-pressure steam inlet 23: flange docking structure, external low-pressure steam pipeline; inspection observation hole 24: embedded structure.

[0023] The stages of use of the device are: In the overall operation process of the electric precipitator, the low-pressure nitrogen end 101 is continuously in operation. Whether in the tail gas treatment stage or the cleaning stage, the nitrogen maintains the protection of the environment inside the tower body 3 to prevent safety problems caused by changes in operating conditions (such as temperature increase, oil mist concentration increase, etc.); Oil removal stage: the oily exhaust gas end 102 enters from the side of the tower bottom → honeycomb electrodes ionize and capture oil mist → purified gas is discharged; Cleaning stage: steam from low-pressure steam end 103 heats the water tank to 80°C → start the circulation pump → inject degreaser; Water source 104 is used for water supply, and high-temperature cleaning liquid is used to flush the electrodes through the rotating spray arm → the oily wastewater flows back to the water tank; Separation stage: oil-water separation in the inclined plate bin (residence time ≥ 30min); The floating oil overflows into the oil collecting tank (viscosity > 500 cP can still flow) and is recycled with clean water; finally, it is discharged through the waste water terminal 105 and the purified waste gas treatment device 106.

[0024] The working principle of the present invention is as follows: the oily waste gas from the oily waste gas end 102 enters the interior of the tower body 3 from the side of the tower bottom through the oily waste gas source inlet 10. Inside the tower body 3, the honeycomb electrode tube 6 serves as the oil capture area. Its unique hexagonal honeycomb structure provides a large specific surface area, which is conducive to full contact between the waste gas and the electrode. The electrode generator 9 provides a high-voltage electrode power supply to the honeycomb electrode tube 6, so that the oil mist particles are ionized under the action of the electric field and adhere to the surface of the honeycomb electrode tube 6, thereby achieving separation of the oil mist and the gas. During this process, the electrode weight 5 relies on its own weight to maintain the electrode wire at the center of the anode tube, ensuring the stability and uniformity of the electric field and improving the ionization capture efficiency. The low-pressure nitrogen end 101 continuously introduces low-pressure nitrogen into the top of the tower body 3 through the nitrogen protection insertion port 13. During the tail gas treatment stage, the nitrogen forms a protective atmosphere in the tower body 3 to prevent safety problems such as oxidation or explosion caused by changes in operating conditions, such as temperature increase and oil mist concentration increase. During the cleaning stage, the nitrogen also maintains protection of the environment inside the tower body 3 to ensure that the cleaning process is carried out in a safe environment. The nitrogen protection mechanism runs through the entire operation process of the device and is closely linked with the exhaust gas treatment, cleaning and other links to provide a guarantee for the safe operation of the device. At the beginning of the cleaning stage, the steam from the low-pressure steam end 103 is introduced into the upper part of the tower body 3 through the low-pressure steam purge port 7. At the same time, the low-pressure steam inlet 23 introduces steam into the cleaning water tank body 17 to heat the water in the water tank. The temperature sensor connected to the temperature sensor inlet 21 monitors the water temperature in the water tank in real time. When the water temperature reaches the set value, the system can automatically adjust the steam input to ensure that the water temperature is stable within an appropriate range, providing high temperature conditions for subsequent cleaning work and improving the cleaning effect. The water source end 104 delivers water to the cleaning water tank body 17 to form a cleaning liquid. After the circulation pump is started, the cleaning liquid is sprayed out through the flushing spray port 12 at a specific angle (120° downward) and a nozzle aperture (1mm), forming a rotating spray effect, evenly flushing the accumulated oil on the surface of the honeycomb electrode tube 6. At the same time, the deoiling agent adding device 19 injects deoiling agent into the cleaning water tank through the flange docking structure. The deoiling agent mixes with the high-temperature cleaning liquid, enhancing the dissolution and stripping ability of oil stains and improving the cleaning efficiency. The oily wastewater generated during the cleaning process is discharged through the flushing drain port 2 and returned to the cleaning water tank body 17. Within the water tank, the oily wastewater enters the inclined plate silo for oil-water separation. By extending the residence time (≥30 minutes), the oil and water are fully separated, and high-viscosity floating oil (viscosity >500cP) can overflow into the oil sump, while the clean water returns to the spray system through the flushing water circulation outlet 16 for recycling. This process not only reduces the waste of water resources but also reduces the cost of wastewater treatment, reflecting the environmental protection and economic efficiency of the device. An inspection port 4 is provided at the bottom of the tower body 3, which adopts a quick-release cover mode to facilitate staff to quickly enter the tower body 3 for inspection and maintenance work. The inspection ladder 11 set on one side of the tower body 3 is made of carbon steel and is in the form of a straight ladder, which provides convenience for staff to climb to the top of the tower body 3. At the same time, guardrails 8 are set around the tower body 3 and on the inspection platform to provide safety protection when the staff perform inspection operations, prevent safety accidents such as falling, and ensure that the staff can safely and conveniently inspect and repair the device; the inspection observation hole 24 is provided on the side of the tower body 3 with an embedded structure, and the staff can observe the internal operation of the tower body 3 in real time through the observation hole, such as the oil accumulation degree of the electrode, the spraying effect, etc.; combined with the temperature sensor connected to the temperature sensor access port 21 and other monitoring equipment, comprehensive monitoring of the operating status of the device is achieved. Once an abnormal situation is found, the staff can enter the tower body 3 through the inspection port 4 in time for processing, ensuring that the device is always in good operating condition.

[0025] Finally, a few points should be explained: First, in the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "mounted", "connected", and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict. Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An easy-to-clean electric precipitator oil remover, characterized by: It includes an electric precipitator oil remover bracket (1), a cleaning water tank bracket (15), a low-pressure nitrogen end (101), an oily waste gas end (102), a low-pressure steam end (103), a water source end (104), a waste water end (105) and a purified waste gas treatment device (106); An electric precipitator oil remover bracket (1), wherein the electric precipitator oil remover bracket (1) is used to stabilize the electric precipitator oil remover body; The tower body (3) contains a core area for treating exhaust gas; An electrode weight (5), wherein the electrode weight (5) is arranged inside the tower body (3); A honeycomb electrode tube (6), the honeycomb electrode tube (6) being located in the middle and upper part of the tower body (3) and adopting a hexagonal honeycomb structure; A low-pressure steam purge port (7), the low-pressure steam purge port (7) being located at the upper portion of the tower body (3) and being used for online cleaning of accumulated oil on the honeycomb electrode tube (6); An electrode generator (9), the electrode generator (9) being connected to the honeycomb electrode tube (6) and used for ionizing and capturing oil mist; A flushing spray port (12), the flushing spray port (12) being located at the upper portion of the tower body (3) and connected to a flushing circulation pump, and being used to perform deep cleaning of the honeycomb electrode tube (6) in conjunction with a degreasing agent; A nitrogen protection insertion port (13), the nitrogen protection insertion port (13) is located at the top of the tower body (3) and is used to introduce a low-pressure nitrogen end (101); The cleaning water tank device comprises a cleaning water tank bracket (15), a flushing water circulation outlet (16), a cleaning water tank body (17), a cleaning water tank water source inlet (18), a degreasing agent adding device (19), a temperature sensor inlet (21), a vent (22), a low-pressure steam inlet (23) and an inspection observation hole (24).

2. The easy-to-clean electric precipitator according to claim 1, characterized in that: The bottom of the tower body (3) is provided with an inspection port (4) for staff to perform inspection and maintenance.

3. The easy-to-clean electric precipitator according to claim 1, characterized in that: The bottom of the tower body (3) is provided with a flushing drain port (2) and a drain port (20), respectively. The flushing drain port (2) is used to discharge oily wastewater generated during the flushing process, and the drain port (20) is used to regularly discharge sediment in the cleaning water tank. Both the flushing drain port (2) and the drain port (20) are connected to an external pipeline through a flange structure.

4. The easy-to-clean electric precipitator oil remover according to claim 1, characterized in that: A maintenance ladder (11) and a guardrail (8) are respectively provided on one side of the tower body (3). The maintenance ladder (11) is made of carbon steel and is in the form of a straight ladder. It is used for workers to climb to the top of the tower body (3) for maintenance. The guardrail (8) is provided around the tower body (3) and on the maintenance platform for safety protection.

5. The easy-to-clean electric precipitator according to claim 1, characterized in that: An oily waste gas source inlet (10) is provided at the bottom of the side of the tower body (3) for introducing the oily waste gas end (102) to be treated, and a purified waste gas outlet (14) is provided at the top of the tower body (3) for discharging the treated clean gas.

6. The easy-to-clean electric precipitator according to claim 1, characterized in that: The cleaning water tank body (17) is fixed to the ground via a cleaning water tank bracket (15); the cleaning water tank water source inlet (18) is connected to a flushing circulation pump to form a closed circulating water system; the temperature sensor inlet (21) is used to monitor the water temperature in the water tank.

7. The easy-to-clean electric precipitator according to claim 1, characterized in that: The vent (22) is used to discharge excess gas in the cleaning water tank body (17), and the low-pressure steam inlet (23) is used to introduce steam to heat the cleaning water tank body (17).

8. The easy-to-clean electric precipitator oil remover according to claim 1, characterized in that: The inspection observation hole (24) embedded structure is provided on the side of the tower body (3) and is used to observe the internal operation of the tower body (3).

9. The easy-to-clean electric precipitator according to claim 1, characterized in that: The low-pressure nitrogen end (101) is introduced into the top of the tower body (3) through the nitrogen protection introduction port (13).

10. The easy-to-clean electric precipitator according to claim 1, characterized in that: The low-pressure steam end (103) is introduced into the upper part of the tower body (3) through the low-pressure steam purge port (7).

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