Alternating non-stop exhaust gas resin adsorption and desorption condensation recovery assembly

Abstract

This utility model relates to the field of waste gas resin adsorption treatment and recovery technology, specifically disclosing an alternating, non-stop waste gas resin adsorption-desorption-condensation recovery assembly. It includes a bag filter, a first resin filter box, and a second resin filter box. The first resin filter box is fixedly installed on the ground, and an auxiliary exhaust pump is fixedly installed on the ground at one end of the first resin filter box. In this alternating, non-stop waste gas resin adsorption-desorption-condensation recovery assembly, after the waste gas passes through the first resin filter box, a gas monitoring sensor monitors the filtered gas. Once the gas is saturated, the first and second reversing solenoid valves automatically switch, allowing the waste gas to change its flow direction and enter the second resin filter box. During this process, resin whose filtration effect has decreased and can no longer be used can be replaced without stopping the machine, ensuring continuous production and improving the convenience of maintenance.

Description

Technical Field

[0001] This utility model relates to the field of waste gas resin adsorption treatment and recovery technology, specifically a waste gas resin adsorption-desorption-condensation recovery component that operates alternately without shutdown. Background Technology

[0002] In industrial production (such as coating, printing, chemical, and pharmaceutical industries), volatile organic compounds (VOCs) are one of the main air pollutants. They not only damage the environment (such as forming ozone and PM2.5), but also cause resource waste (most VOC solvents have recycling and reuse value) and safety hazards (flammable and explosive properties). With increasingly stringent environmental regulations and the growing demand from enterprises for "cost reduction and efficiency improvement + circular economy", VOC waste gas treatment has shifted from "achieving emission standards" to "resource recovery". This trend has driven the iteration of waste gas treatment technologies. Early VOC treatment mainly relied on "destructive technologies" (such as direct combustion, catalytic combustion RCO, and regenerative thermal oxidizer RTO) and "simple adsorption technologies" (such as fixed-bed activated carbon adsorption). However, these technologies have significant shortcomings and cannot meet the dual needs of continuous industrial production and resource recovery. Furthermore, when activated carbon becomes completely unusable, the system must be shut down for replacement before processing and use can continue, which is inconvenient and does not allow for the recovery of VOCs from the waste gas. Utility Model Content

[0003] The purpose of this invention is to provide an alternating, non-shutdown-free waste gas resin adsorption-desorption-condensation recovery component to solve the problem mentioned in the background art that only shutdown for maintenance is possible and VOCs in the waste gas cannot be recovered.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an alternating, non-stop waste gas resin adsorption-desorption-condensation recovery assembly, comprising a bag filter, a first resin filter box, and a second resin filter box. The first resin filter box is fixedly installed on the ground, and the second resin filter box is fixedly installed on one side of the ground. An auxiliary exhaust pump is fixedly installed on the ground at one end of the first resin filter box, and the auxiliary exhaust pump is connected to both the first and second resin filter boxes. A second reversing solenoid valve is fixedly installed at the end of the second resin filter box near the auxiliary exhaust pump, and the other end of the second reversing solenoid valve is connected to the first resin filter box. A first reversing solenoid valve is fixedly installed at the end of the first resin filter box away from the auxiliary exhaust pump, and the first reversing solenoid valve is connected to the second resin filter box.

[0005] Preferably, a bag filter is fixedly installed at one end of the first reversing solenoid valve, and the bag filter is in contact with the outer surface of the exhaust pipe.

[0006] By adopting the above technical solution, the exhaust gas can be filtered through the use of bag filters to remove impurities and particles from the exhaust gas, thereby reducing the lifespan of the resin caused by impurities entering the first and second resin filter boxes, greatly extending the lifespan of the filled resin material, and reducing the replacement cycle and operating costs.

[0007] Preferably, gas monitoring sensors are threadedly installed on the outer surfaces of both ends of the second reversing solenoid valve, and one end of the gas monitoring sensor is inserted into the pipes at both ends of the second reversing solenoid valve.

[0008] By adopting the above technical solution, the gas filtered inside the first and second resin filter boxes can be monitored by a gas monitoring sensor. Once the gas discharged from the first or second resin filter box is detected to be saturated, the first, second, third, and fourth reversing solenoid valves can be automatically switched. For example, if the gas monitoring sensor detects that the exhaust gas is saturated after entering the first resin filter box, the first, second, third, and fourth reversing solenoid valves can be switched to allow the gas to enter the second resin filter box for filtration. This achieves automatic switching and reduces the probability of incompletely filtered exhaust gas being discharged.

[0009] Preferably, a spring hose is fixedly installed between the second reversing solenoid valve and the auxiliary exhaust pump, and drain valves are fixedly installed on the bottom outer surfaces of the first resin filter box and the second resin filter box, respectively.

[0010] By adopting the above technical solution, the vibration generated by the auxiliary exhaust pump during rotation can be effectively filtered through the spring hose, preventing the vibration from being transmitted to the second reversing solenoid valve, the first resin filter box, and the second resin filter box, thus avoiding loosening of the components. At the same time, the use of the drain valve can discharge the liquid that is accidentally condensed inside the first and second resin filter boxes and collect it in a container, so that the condensate will not accumulate inside the first and second resin filter boxes and affect the subsequent filtration and absorption of exhaust gas by the resin.

[0011] Preferably, a steam generating tank is fixedly installed on the ground on the side of the second resin filter box away from the first resin filter box, and a third reversing solenoid valve is fixedly installed at one end of the steam generating tank. The third reversing solenoid valve is connected to both the first and second resin filter boxes. The third reversing solenoid valve is located away from the ground and is designed at an angle. A fourth reversing solenoid valve is fixedly installed on the side of the first and second resin filter boxes away from the bag filter, and the fourth reversing solenoid valve is connected to both the first and second resin filter boxes.

[0012] Using the above technical solution, when the steam generating tank is working, the steam generated by boiling water is sent through a pipeline to the first resin filter box or the second resin filter box. The steam can be sent into the saturated first resin filter box or the second resin filter box to heat the resin filled in the first resin filter box or the second resin filter box, and remove VOCs through heating. At the same time, through the inclined design and different heights of the third reversing solenoid valve and the fourth reversing solenoid valve, the VOCs in the resin can be better removed, and the VOCs can be removed alternately, so that the component can be used continuously in a cycle.

[0013] Preferably, a steam cooling box is placed on the ground to one side of the fourth reversing solenoid valve, and the steam cooling box is connected to the fourth reversing solenoid valve. A cryogenic gas-liquid separator is placed on the ground to one side of the steam cooling box, and the cryogenic gas-liquid separator is connected to the steam cooling box. A cooling tower is fixedly installed on the ground to one side of the steam cooling box, and a suction water pump is fixedly installed on the outer surface of the cooling tower. The suction water pump and the cooling tower are respectively connected to the steam cooling box. An exhaust pipe is fixedly installed on the outer surface of the cryogenic gas-liquid separator.

[0014] By adopting the above technical solution, the steam cooling box can first rapidly cool and initially condense the incoming steam, and the cooling tower can cool the cooling water circulating inside the steam cooling box. The suction water pump can then inject the cooled water back into the steam cooling box for circulation, and the steam can be discharged from the steam cooling box into the cryogenic gas-liquid separator for secondary condensation. This allows the mixed gas to be separated more effectively, greatly reducing the chance of VOCs escaping from the drain valve and improving the efficiency and quality of recovery.

[0015] Preferably, the cryogenic gas-liquid separator is equipped with a radiator inside, and the radiator is in contact with the pipes of the steam cooling tank and the cooling tower. The pipes of the steam cooling tank and the cooling tower are connected to the water tank of the steam generating tank. A connecting and reversing solenoid valve is fixedly installed between the pipes of the steam generating tank, the steam cooling tank and the cooling tower.

[0016] Using the above technical solution, when the water in the steam generating tank evaporates to a low level, the connecting reversing solenoid valve will be opened, cutting off the hot water in the steam cooling box from the cooling tower. This allows the hot water to be reheated through the radiator to raise its temperature again, and finally, the hot water is discharged back into the steam generating tank to replenish the water inside the steam generating tank. It also recovers and utilizes the heat generated during the condensation of the steam cooling box and the cryogenic gas-liquid separator, reducing the energy consumption for reheating the steam generating tank and enabling the steam generating tank to continuously and stably generate steam.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the alternating, non-stop waste gas resin adsorption-desorption-condensation recovery component: 1. During operation, the exhaust gas will first pass through a bag filter to remove dust and impurities from the air, ensuring that the exhaust gas entering the first resin filter box will not affect the resin. After being filtered by the first resin filter box, the gas is drawn out by the auxiliary exhaust pump and discharged through the second reversing solenoid valve. The gas monitoring sensor monitors the filtered gas. When the gas monitoring sensor detects that the gas is saturated, the exhaust gas can be discharged into the second resin filter box for filtration again by automatically switching between the first and second reversing solenoid valves. During this process, the resin whose filtration effect has decreased and can no longer be used can be replaced without stopping the machine, ensuring the continuity of production and improving the convenience of maintenance. 2. After the steam generator produces steam, the steam in the steam generator will enter the interior of the first resin filter box through the third reversing solenoid valve to heat the saturated resin inside the first resin filter box and remove VOCs. After the second resin filter box is saturated, the steam enters the second resin filter box through the switching of the third and fourth reversing solenoid valves. The mixed steam can then be discharged into the interior of the steam cooling box through the fourth reversing solenoid valve for initial condensation, and then enter the cryogenic gas-liquid separator for secondary condensation. This allows the VOCs in the mixed steam to be better separated and reduces the chance of VOCs escaping from the exhaust pipe. At the same time, it can also continuously desorb and recover the first or second resin filter box, greatly improving the convenience and practicality of use, and allowing VOCs to be recovered and reused. 3. The simultaneous use of the cooling tower and the suction water pump can effectively and continuously cool the circulating cooling water in the steam cooling tank. When the water in the steam generating tank reaches the low liquid level, the connecting reversing solenoid valve will be opened, allowing the hot water in the condensed steam cooling tank to flow to the cooling tower pipeline. The hot water generated after condensation can pass through the cryogenic gas-liquid separator and be reheated by the radiator. The heated water can then be injected into the water tank of the steam generating tank, preventing the water temperature in the steam generating tank from dropping excessively and requiring prolonged reheating. This ensures the stability of steam generation in the steam generating tank, allows the heat generated during condensation to be recovered and utilized, reduces the heating energy consumption of the steam generating tank, lowers the cost of use, and improves the convenience of use. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the first resin filter box and the second resin filter box of this utility model; Figure 2 This is a three-dimensional structural diagram of the auxiliary exhaust pump and drain valve of this utility model; Figure 3 This is a three-dimensional exploded view of the second reversing solenoid valve and gas monitoring sensor of this utility model. Figure 4 This is a three-dimensional structural diagram of the steam generating tank and cooling tower of this utility model; Figure 5 This is a three-dimensional structural diagram of the auxiliary exhaust pump and spring hose of this utility model; Figure 6 This is a three-dimensional structural diagram of the water pump and radiator of this utility model.

[0019] In the diagram: 1. Bag filter; 2. First resin filter box; 3. Second resin filter box; 4. First reversing solenoid valve; 5. Second reversing solenoid valve; 6. Gas monitoring sensor; 7. Auxiliary exhaust pump; 8. Spring hose; 9. Steam generator; 10. Third reversing solenoid valve; 11. Fourth reversing solenoid valve; 12. Steam cooling box; 13. Cooling tower; 14. Suction pump; 15. Connecting reversing solenoid valve; 16. Cryogenic gas-liquid separator; 17. Radiator; 18. Exhaust pipe; 19. Drain valve. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-6 This utility model provides a technical solution: an alternating, non-stop waste gas resin adsorption-desorption-condensation recovery assembly, comprising a bag filter 1, a first resin filter box 2, and a second resin filter box 3. The first resin filter box 2 is fixedly installed on the ground, and the second resin filter box 3 is fixedly installed on one side of the ground of the first resin filter box 2. An auxiliary exhaust pump 7 is fixedly installed on the ground at one end of the first resin filter box 2, and the auxiliary exhaust pump 7 is connected to both the first resin filter box 2 and the second resin filter box 3. A second heat exchanger is fixedly installed at the end of the second resin filter box 3 closest to the auxiliary exhaust pump 7. The second reversing solenoid valve 5 is connected to the first resin filter box 2 at one end. Gas monitoring sensors 6 are threadedly installed on the outer surfaces of both ends of the second reversing solenoid valve 5, and one end of the gas monitoring sensor 6 is inserted into the pipes at both ends of the second reversing solenoid valve 5. The first reversing solenoid valve 4 is fixedly installed on the end of the first resin filter box 2 away from the auxiliary exhaust pump 7, and the first reversing solenoid valve 4 is connected to the second resin filter box 3. A bag filter 1 is fixedly installed on one end of the first reversing solenoid valve 4, and the bag filter 1 is in contact with the outer surface of the exhaust pipe.

[0022] Firstly, when using the condensation recovery assembly, the exhaust gas first enters the bag filter 1 to remove dust and impurities. Then, it enters the first resin filter box 2 through the first reversing solenoid valve 4, allowing the exhaust gas to be filtered by the resin in the first resin filter box 2 and discharged out through the second reversing solenoid valve 5. Finally, the filtered exhaust gas is monitored by the gas monitoring sensor 6 when passing through the second reversing solenoid valve 5, so that the first resin filter box 2 can be detected after filtration saturation. Then, by switching between the first reversing solenoid valve 4 and the second reversing solenoid valve 5, the exhaust gas can enter the second resin filter box 3 through the first reversing solenoid valve 4 and be discharged again through the second reversing solenoid valve 5. This allows the automatic switching after the resin adsorption inside the first resin filter box 2 or the second resin filter box 3 is saturated, and the continuous absorption of VOCs in the exhaust gas can be achieved without stopping the machine during production. Moreover, after the resin adsorption effect decreases, the first resin filter box 2 or the second resin filter box 3 can be opened separately for replacement, which greatly improves the practicality and convenience of maintenance of the condensation recovery assembly.

[0023] A spring hose 8 is fixedly installed between the second reversing solenoid valve 5 and the auxiliary exhaust pump 7. Drain valves 19 are fixedly installed on the bottom outer surfaces of the first resin filter box 2 and the second resin filter box 3, respectively.

[0024] Secondly, the use of auxiliary exhaust pump 7 can improve the efficiency of exhaust gas passing through the first resin filter box 2 or the second resin filter box 3. With the use of spring hose 8, vibration will not be transmitted to the second reversing solenoid valve 5, which may cause parts to loosen. At the same time, the use of drain valve 19 can release and recover water that is accidentally condensed in the first resin filter box 2 or the second resin filter box 3, ensuring the efficiency of exhaust gas passage and reducing the impact of excessive condensate on the performance of the first resin filter box 2 or the second resin filter box 3.

[0025] A steam generator 9 is fixedly installed on the ground on the side of the second resin filter box 3 away from the first resin filter box 2. A third reversing solenoid valve 10 is fixedly installed at one end of the steam generator 9. The third reversing solenoid valve 10 is connected to both the first resin filter box 2 and the second resin filter box 3. The third reversing solenoid valve 10 is off the ground and is designed at an angle. A fourth reversing solenoid valve 11 is fixedly installed on the side of the first resin filter box 2 and the second resin filter box 3 away from the bag filter 1. The fourth reversing solenoid valve 11 is connected to both the first resin filter box 2 and the second resin filter box 3. The four reversing solenoid valves 11 are connected. A steam cooling box 12 is placed on the ground on one side of the fourth reversing solenoid valve 11, and the steam cooling box 12 is connected to the fourth reversing solenoid valve 11. A cryogenic gas-liquid separator 16 is placed on the ground on one side of the steam cooling box 12, and the cryogenic gas-liquid separator 16 is connected to the steam cooling box 12. A cooling tower 13 is fixedly installed on the ground on one side of the steam cooling box 12, and a suction water pump 14 is fixedly installed on the outer surface of the cooling tower 13. The suction water pump 14 and the cooling tower 13 are respectively connected to the steam cooling box 12. An exhaust pipe 18 is fixedly installed on the outer surface of the cryogenic gas-liquid separator 16.

[0026] When the first resin filter box 2 becomes saturated and the process switches to the second resin filter box 3 for adsorption, the steam generated by the steam generator 9 will enter the first resin filter box 2 through the third reversing solenoid valve 10. This allows the steam to pass through the first resin filter box 2 and heat the stored resin, removing the adsorbed VOCs. The resulting mixed steam can then enter the steam cooling box 12 through the fourth reversing solenoid valve 11 for initial cooling and condensation. After the second resin filter box 3 becomes saturated, the steam is switched between the third and fourth reversing solenoid valves 10 and 11, allowing it to enter the second resin filter box 3 through the third reversing solenoid valve 10 and then exit through the fourth reversing solenoid valve. The mixture is discharged into the steam cooling box 12. The cooling tower 13 and the suction water pump 14 continuously cool the inside of the steam cooling box 12 to ensure the cooling of the mixed steam. At the same time, the mixed steam will re-enter the cryogenic gas-liquid separator 16 for secondary cooling, so that the VOCs in the mixed steam can be further condensed and separated, greatly reducing the chance of VOCs escaping from the exhaust pipe 18. This allows the first resin filter box 2 and the second resin filter box 3 to continuously process the saturated first resin filter box 2 or second resin filter box 3, so that the first resin filter box 2 and the second resin filter box 3 can be reused repeatedly, greatly improving the convenience and practicality of the condensation component.

[0027] The cryogenic gas-liquid separator 16 is equipped with a radiator 17, which is in close contact with the pipes of the steam cooling box 12 and the cooling tower 13. The pipes of the steam cooling box 12 and the cooling tower 13 are connected to the water tank of the steam generating tank 9. A connecting reversing solenoid valve 15 is fixedly installed between the pipes of the steam generating tank 9, the steam cooling box 12 and the cooling tower 13.

[0028] Furthermore, when the water level in the steam cooling box 12 is low during continuous operation, the connecting reversing solenoid valve 15 will switch the circuit to cut off the pipe between the steam cooling box 12 and the cooling tower 13. This allows the cooling water heated by steam in the steam cooling box 12 to pass through the cryogenic gas-liquid separator 16 and then be reheated by the radiator 17. This prevents the hot water discharged into the steam generating tank 9 from excessively lowering the overall temperature of the water tank, reducing the time required to reheat the water in the steam cooling box 12. This allows the heat generated during condensation in the steam cooling box 12 and the connecting reversing solenoid valve 15 to be recovered and utilized, reducing the energy consumption for reheating the water in the steam cooling box 12. This allows the water in the steam cooling box 12 to boil and generate steam in a shorter time, greatly ensuring the practicality and stability of the steam cooling box 12, while significantly reducing the energy consumption of the condensation components.

[0029] Working Principle: During operation, exhaust gas first enters the bag filter 1 to remove dust and impurities, and then enters the first resin filter box 2 through the first reversing solenoid valve 4. The resin in the first resin filter box 2 adsorbs and filters the exhaust gas. An auxiliary exhaust pump 7 allows the exhaust gas to pass through the first resin filter box 2 more effectively. After the resin in the first resin filter box 2 is saturated, the first reversing solenoid valve 4 and the second reversing solenoid valve 5 switch the exhaust gas into the second resin filter box 3. Simultaneously, steam generated by the steam generator 9 enters the first resin filter box 2 through the third reversing solenoid valve 10. The heat of the steam heats the resin in the first resin filter box 2, removing the VOCs adsorbed within the resin. This process is then carried out in the second resin filter box 3. After the filter box 3 is saturated, the steam can enter the second resin filter box 3 by switching between the third reversing solenoid valve 10 and the fourth reversing solenoid valve 11. The mixed steam can be discharged from the fourth reversing solenoid valve 11 and enter the steam cooling box 12. Through the use of the cooling tower 13 and the suction water pump 14, the interior of the steam cooling box 12 is continuously cooled, ensuring that the mixed steam can be initially condensed when passing through the steam cooling box 12. The mixed steam can then enter the cryogenic gas-liquid separator 16 for further condensation, allowing the mixed steam to be better condensed and separated. This greatly reduces the probability of VOCs escaping from the exhaust pipe 18 and allows the condensation filter assembly to be used without stopping the machine during maintenance, ensuring the continuity, flexibility, and environmental friendliness of the condensation assembly operation.

[0030] 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 alternating, non-stop waste gas resin adsorption-desorption-condensation recovery assembly, comprising a bag filter (1), a first resin filter box (2), and a second resin filter box (3), wherein the first resin filter box (2) is fixedly installed on the ground, and the second resin filter box (3) is fixedly installed on one side of the ground of the first resin filter box (2), characterized in that: An auxiliary exhaust pump (7) is fixedly installed on the ground at one end of the first resin filter box (2), and the auxiliary exhaust pump (7) is connected to the first resin filter box (2) and the second resin filter box (3) respectively. A second reversing solenoid valve (5) is fixedly installed at the end of the second resin filter box (3) close to the auxiliary exhaust pump (7), and the other end of the second reversing solenoid valve (5) is connected to the first resin filter box (2). A first reversing solenoid valve (4) is fixedly installed at the end of the first resin filter box (2) away from the auxiliary exhaust pump (7), and the first reversing solenoid valve (4) is connected to the second resin filter box (3).

2. The alternating, non-stop waste gas resin adsorption-desorption-condensation recovery assembly according to claim 1, characterized in that: A bag filter (1) is fixedly installed at one end of the first reversing solenoid valve (4), and the bag filter (1) is in contact with the outer surface of the exhaust pipe.

3. The alternating, non-stop waste gas resin adsorption-desorption-condensation recovery assembly according to claim 1, characterized in that: Gas monitoring sensors (6) are threaded onto the outer surfaces of both ends of the second reversing solenoid valve (5), and one end of the gas monitoring sensor (6) is inserted into the pipes at both ends of the second reversing solenoid valve (5).

4. The alternating, non-stop waste gas resin adsorption-desorption-condensation recovery assembly according to claim 1, characterized in that: A spring hose (8) is fixedly installed between the second reversing solenoid valve (5) and the auxiliary exhaust pump (7), and drain valves (19) are fixedly installed on the bottom outer surfaces of the first resin filter box (2) and the second resin filter box (3).

5. The alternating, non-stop waste gas resin adsorption-desorption-condensation recovery assembly according to claim 1, characterized in that: A steam generator (9) is fixedly installed on the ground on the side of the second resin filter box (3) away from the first resin filter box (2), and a third reversing solenoid valve (10) is fixedly installed at one end of the steam generator (9). The third reversing solenoid valve (10) is connected to the first resin filter box (2) and the second resin filter box (3) respectively. The third reversing solenoid valve (10) is away from the ground and is designed to be inclined. A fourth reversing solenoid valve (11) is fixedly installed at the end of the first resin filter box (2) and the second resin filter box (3) away from the bag filter (1), and the fourth reversing solenoid valve (11) is connected to the first resin filter box (2) and the second resin filter box (3) respectively.

6. The alternating, non-stop waste gas resin adsorption-desorption-condensation recovery assembly according to claim 5, characterized in that: A steam cooling box (12) is placed on the ground on one side of the fourth reversing solenoid valve (11), and the steam cooling box (12) is connected to the fourth reversing solenoid valve (11). A cryogenic gas-liquid separator (16) is placed on the ground on one side of the steam cooling box (12), and the cryogenic gas-liquid separator (16) is connected to the steam cooling box (12). A cooling tower (13) is fixedly installed on the ground on one side of the steam cooling box (12), and a suction water pump (14) is fixedly installed on the outer surface of the cooling tower (13). The suction water pump (14) and the cooling tower (13) are respectively connected to the steam cooling box (12). An exhaust pipe (18) is fixedly installed on the outer surface of the cryogenic gas-liquid separator (16).

7. The alternating, non-stop waste gas resin adsorption-desorption-condensation recovery assembly according to claim 6, characterized in that: The cryogenic gas-liquid separator (16) is equipped with a radiator (17), and the radiator (17) is in contact with the pipes of the steam cooling tank (12) and the cooling tower (13). The pipes of the steam cooling tank (12) and the cooling tower (13) are connected to the water tank of the steam generating tank (9). A connecting solenoid valve (15) is fixedly installed between the pipes of the steam generating tank (9), the steam cooling tank (12) and the cooling tower (13).

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