Liquid effluent-to-gaseous discharge system

Abstract

The invention relates to the field of inland nuclear facilities, and discloses a liquid effluent-to-gaseous discharge system, which comprises a shell, a liquid inlet, an exhaust port, a gas inlet, a gas outlet and a gas outlet, the number of the carrier tape plates is multiple, the multiple carrier tape plates are sequentially distributed in the shell in the height direction of the shell, the carrier tape plates are all connected with the shell, and circulation channels are formed between the carrier tape plates and the inner wall of the shell and / or in the carrier tape plates; the liquid outlet end of the liquid supply branch is connected with the liquid inlet of the shell, and the liquid supply branch is used for providing liquid effluent for the shell; and the gas outlet end of the gas supply branch is connected with the gas inlet of the shell, and the gas supply branch is used for providing carrier tape gas for the shell. The carrier band plates are arranged in the height direction of the shell, so that gas-liquid mass transfer is carried out between the liquid effluent and the carrier band gas on the carrier band plates, the space in the height direction can be fully utilized, and the effect of increasing the mass transfer area under the condition that the occupied area is not increased is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of inland nuclear facilities, and in particular to a liquid effluent-to-gas emission system. Background Art

[0002] Radioactive liquid waste is often generated during the production and operation of nuclear facilities. After being treated by various waste liquid treatment systems such as evaporation and ion exchange and meeting the emission standards, the radioactive liquid waste becomes liquid effluent.

[0003] For nuclear facilities with surrounding receiving water bodies, their liquid effluents can be discharged into the surrounding water bodies. For inland nuclear facilities without surrounding receiving water bodies, converting liquid effluents into gaseous emissions is one of the key research directions at present.

[0004] In the related art, there is a natural evaporation method for converting liquid effluent into gaseous discharge. The natural evaporation method uses an open-air evaporation pool to discharge liquid effluent. The natural evaporation method has a simple structure and low cost, but requires a larger evaporation pool to ensure the evaporation effect, resulting in a large occupied area. Summary of the invention

[0005] In view of this, the present invention provides a liquid effluent to gaseous discharge system to solve the problem of large occupied area in the method of converting liquid effluent to gaseous discharge in the related art.

[0006] In a first aspect, the present invention provides a liquid effluent to gaseous discharge system, comprising:

[0007] A shell, wherein a liquid inlet and an exhaust port are provided at the top end of the shell, and an air inlet is provided at the bottom end of the shell;

[0008] A carrier plate, wherein the number of the carrier plates is set to be multiple, and along the height direction of the shell, the multiple carrier plates are sequentially distributed in the shell, the carrier plates are all connected to the shell, and a flow channel is provided between the carrier plate and the inner wall of the shell and / or on the carrier plate;

[0009] a liquid supply branch, wherein a liquid outlet end of the liquid supply branch is connected to the liquid inlet, and the liquid supply branch is used to provide liquid outflow to the shell;

[0010] An air supply branch, wherein the air outlet of the air supply branch is connected to the air inlet, and the air supply branch is used to provide carrier gas to the shell.

[0011] In an optional embodiment, the flow channels of any two adjacent carrier plates are staggered with each other in the height direction of the shell.

[0012] In an optional embodiment, the carrier plate includes a bottom plate and a side plate;

[0013] Part of the edge of the bottom plate is connected to the inner wall of the shell, and there is a distance between another part of the edge of the bottom plate and the inner wall of the shell to form the flow channel, the edge of the bottom plate not connected to the shell is connected to the side plate, and the bottom plate, the side plate and the inner wall of the shell form a liquid storage tank.

[0014] In an optional embodiment, the liquid supply branch includes a circulation tank and a pumping device, the liquid inlet end of the pumping device is connected to the liquid outlet end of the circulation tank, the liquid outlet end of the pumping device is connected to the liquid inlet, and a liquid outlet is also provided at the bottom end of the shell, and the liquid outlet is connected to the liquid inlet end of the circulation tank.

[0015] In an optional embodiment, it also includes a specific activity detection device, a control component and a drainage branch, the specific activity detection device is used to detect the specific activity of the liquid in the circulation tank, the drainage branch is connected to the liquid outlet end of the circulation tank, the specific activity detection device and the drainage branch are both electrically connected to the control component, and when the control component determines that the specific activity is greater than the specific activity threshold, the drainage branch is controlled to open.

[0016] In an optional embodiment, the air supply branch includes a fan, a first control valve and a first heating device, the air outlet end of the fan is connected to the air inlet, and the first control valve and the first heating device are both connected between the fan and the air inlet.

[0017] In an optional embodiment, it also includes a humidity detection device, an ambient temperature detection device and a control component;

[0018] Wherein, the humidity detection device is arranged at the exhaust port and is used to detect the humidity value of the exhaust gas, the ambient temperature detection device is used to detect the ambient temperature, and the humidity detection device and the ambient temperature detection device are both electrically connected to the control component;

[0019] The control component is used to calculate the corresponding saturated humidity according to the ambient temperature, and when the humidity value is greater than or equal to a preset percentage of the saturated humidity, control the opening of the first control valve to increase and / or control the power of the first heating device to decrease.

[0020] In an optional embodiment, the air supply branch includes a fan and a drying device, the inlet end of the drying device is connected to the air outlet end of the fan, and the outlet end of the drying device is connected to the air inlet.

[0021] In an optional embodiment, the air supply branch further includes an exhaust branch, the number of the drying devices is set to at least two, the drying devices are all set to be regenerable drying devices, and the outlet ends of the drying devices are all connected to the exhaust branch.

[0022] In an optional embodiment, the air supply branch further includes a second heating device, the inlet end of the second heating device is connected to the outlet end of the fan, and the outlet end of the second heating device is respectively connected to the inlet end of each of the drying devices.

[0023] In the liquid effluent to gaseous discharge system provided by the present invention, a plurality of carrier plates are arranged in the height direction of the shell so that the liquid effluent can perform gas-liquid mass transfer with the carrier gas on each carrier plate. This can fully utilize the space in the height direction and achieve the effect of increasing the mass transfer area without increasing the floor space. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of a liquid effluent-to-gas discharge system according to an embodiment of the present invention;

[0026] Figure 2 Schematic diagram of the structure of the housing and the carrier board according to an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1. Shell; 101. Liquid inlet; 102. Exhaust port; 103. Air inlet; 104. Liquid outlet; 105. Flow channel; 2. Carrier plate; 201. Bottom plate; 202. Side plate; 3. Liquid supply branch; 301. Circulation tank; 302. Pumping device; 4. Air supply branch; 401. Fan; 402. First control valve; 403. First heating device; 404. Drying device; 405. Exhaust branch; 406. Second heating device; 5. Control assembly; 6. Liquid discharge branch; 7. Humidity detection device. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0030] Combine the following Figure 1 to Figure 2 , describing a liquid effluent to gaseous exhaust system provided in an embodiment of the present invention.

[0031] Specifically, the liquid effluent to gaseous discharge system includes a shell 1, a carrier plate 2, a liquid supply branch 3 and a gas supply branch 4.

[0032] The top of the housing 1 is provided with a liquid inlet 101 and an exhaust port 102 , and the bottom of the housing 1 is provided with an air inlet 103 .

[0033] The number of carrier plates 2 is set to be multiple. Along the height direction of the housing 1, the multiple carrier plates 2 are sequentially distributed in the housing 1. For example, the height direction of the housing 1 is Figure 2 The carrier board 2 is connected to the housing 1, for example, the carrier board 2 is welded to the housing 1 or connected by a connector. A circulation channel 105 is provided between the carrier board 2 and the inner wall of the housing 1, and / or, the carrier board 2 is provided with a circulation channel 105. For example, a portion of the edge of the carrier board 2 is spaced from the inner wall of the housing 1 to form the circulation channel 105. Or, for example, an opening is provided on the carrier board 2 to form the circulation channel 105.

[0034] The liquid outlet end of the liquid supply branch 3 is connected to the liquid inlet 101 , and the liquid supply branch 3 is used to provide liquid outflow to the housing 1 .

[0035] The outlet end of the air supply branch 4 is connected to the air inlet 103, and the air supply branch 4 is used to provide carrier gas to the housing 1. For example, the carrier gas can be air.

[0036] In this embodiment, during use, the liquid supply branch 3 introduces liquid effluent into the housing 1 through the liquid inlet 101, and the liquid effluent flows from top to bottom through the surface of each carrier plate 2. The gas supply branch 4 introduces carrier gas into the housing 1 through the gas inlet 103, and the carrier gas flows from bottom to top through the surface of each carrier plate 2. During this process, the carrier gas and the liquid effluent perform gas-liquid mass transfer, so that the liquid phase enters the gas phase, and finally the carrier gas carries the liquid effluent and is discharged from the exhaust port 102 of the housing 1, completing the treatment process of converting the liquid effluent into gas and then discharging it.

[0037] In this way, by arranging multiple carrier plates 2 in the height direction of the shell 1, so that the liquid effluent can perform gas-liquid mass transfer with the carrier gas on each carrier plate 2, the space in the height direction can be fully utilized and the effect of increasing the mass transfer area can be achieved without increasing the floor space.

[0038] In addition, by allowing the liquid effluent to flow along the carrier plate 2 or transfer between the carrier plates 2, the flow speed of the liquid effluent in the shell 1 can be slowed down, and the flow time of the liquid effluent in the shell 1 can be extended, so that the mass transfer time between the liquid effluent and the carrier gas is increased, thereby improving the mass transfer effect between the liquid effluent and the carrier gas.

[0039] Finally, during the mass transfer process between the liquid effluent and the carrier gas, only a part of the volatile nuclides in the liquid effluent enters the gas phase, and most of the nuclides remain in the concentrated liquid, thereby realizing the separation and decontamination of the residual nuclides in the liquid effluent, and then achieving "near-zero emission" of radioactive waste liquid, which is more environmentally friendly.

[0040] In some embodiments provided by the present invention, the flow channels 105 of any two adjacent carrier plates 2 are staggered with each other in the height direction of the housing 1. Figure 1 or Figure 2 As shown, for any two adjacent carrier plates 2 in the figure, the flow channel 105 of one is close to the left side of the shell 1, and the flow channel 105 of the other is close to the right side of the shell 1.

[0041] In this embodiment, by staggering the flow channels 105 of two adjacent carrier plates 2, the flow paths of the liquid effluent and the carrier gas can be made S-shaped or Z-shaped, thereby extending the flow paths of the liquid effluent and the carrier gas to increase the mass transfer time of the liquid effluent and the carrier gas, allowing the liquid effluent and the carrier gas to fully transfer mass, thereby improving the mass transfer effect of the liquid effluent and the carrier gas.

[0042] In some embodiments provided by the present invention, the carrier plate 2 includes a bottom plate 201 and a side plate 202 .

[0043] Part of the edge of the bottom plate 201 is connected to the inner wall of the shell 1, and there is a gap between the other part of the edge of the bottom plate 201 and the inner wall of the shell 1, and the gap between the edge of the bottom plate 201 and the inner wall of the shell 1 forms a flow channel 105. The part of the bottom plate 201 not connected to the shell 1 is connected to the side plate 202, and the bottom plate 201, the side plate 202 and the inner wall of the shell 1 form a liquid storage tank.

[0044] In this embodiment, during use, the liquid supply branch 3 introduces liquid effluent into the housing 1 through the liquid inlet 101, and the liquid effluent fills the liquid storage groove of each carrier plate 2 from top to bottom. By forming a liquid storage groove with the bottom plate 201, the side plate 202 and the inner wall of the housing 1, the liquid effluent can flow further downward after the liquid storage groove is filled with liquid effluent, so that the surface of each bottom plate 201 can be evenly covered with liquid effluent. In this way, on the one hand, the area of ​​each carrier plate 2 in the housing 1 can be fully utilized to improve the area utilization rate of the carrier plate 2, and on the other hand, the contact area between the liquid effluent and the carrier gas can be increased to ensure the mass transfer effect.

[0045] In some embodiments provided by the present invention, the liquid supply branch 3 includes a circulation tank 301 and a pumping device 302 .

[0046] The liquid inlet of the pumping device 302 is connected to the liquid outlet of the circulation tank 301, and the liquid outlet of the pumping device 302 is connected to the liquid inlet 101. The bottom of the housing 1 is also provided with a liquid outlet 104, and the liquid outlet 104 is connected to the liquid inlet of the circulation tank 301. Optionally, the pumping device 302 can be a water pump.

[0047] In this embodiment, during use, the pumping device 302 continuously pumps the liquid effluent in the circulation tank 301 into the housing 1, and the liquid effluent forms a concentrated liquid after gas-liquid mass transfer with the carrier gas in the housing 1, and returns to the circulation tank 301. During the circulation process, the specific activity of the concentrated liquid in the circulation tank 301 gradually increases. At this time, the concentrated liquid in the circulation tank 301 can be discharged to the waste liquid treatment system for reprocessing, and new liquid effluent can be introduced into the circulation tank 301. As mentioned above, by setting up the circulation tank 301, the liquid effluent can be stored before the system is operated, and the concentrated liquid can be stored when the system is running, so as to centrally process the concentrated liquid and reduce the emission of nuclides.

[0048] In some embodiments provided by the present invention, the liquid effluent to gaseous discharge system further includes a specific activity detection device, a control component 5 and a liquid discharge branch 6.

[0049] The specific activity detection device is used to detect the specific activity of the liquid in the circulation tank 301. For example, the specific activity detection device can be a radioactivity detector, a radiation dose rate meter or a liquid scintillation counter. The drainage branch 6 is connected to the liquid outlet of the circulation tank 301. The specific activity detection device and the drainage branch 6 are both electrically connected to the control component 5. When the control component 5 determines that the specific activity is greater than the specific activity threshold, the drainage branch 6 is controlled to open. For example, the liquid outlet of the drainage branch 6 is connected to a waste liquid treatment system.

[0050] In this embodiment, the specific activity of the concentrated liquid in the circulation tank 301 can be obtained through the specific activity detection device. When the control component 5 determines that the specific activity is greater than the specific activity threshold, it controls the drainage branch 6 to open to discharge the concentrated liquid in the circulation tank 301 to the waste liquid treatment system. In this way, when the specific activity of the concentrated liquid in the circulation tank 301 exceeds the specific activity threshold, the concentrated liquid in the circulation tank 301 can be automatically discharged without manual operation, avoiding exposure of the operator, and improving the automation of the liquid effluent to gas system.

[0051] Optionally, the discharge branch includes a control valve, which is electrically connected to the control component 5 , and the control component 5 can control the opening and closing of the discharge branch through the control valve.

[0052] Optionally, the liquid supply branch 3 is also electrically connected to the control component 5, and when the discharge branch is opened, the control component 5 controls the liquid supply branch 3 to be closed. Specifically, the liquid supply branch 3 also includes a control valve, and the control valve and the pumping device 302 of the liquid supply branch 3 are both electrically connected to the control component 5. When the liquid supply branch 3 is closed, the control valve and the pumping device 302 are both closed, and when the liquid supply branch 3 is opened, the control valve and the pumping device 302 are both opened.

[0053] In some embodiments provided by the present invention, the air supply branch 4 includes a fan 401 , a first control valve 402 and a first heating device 403 .

[0054] The air outlet end of the fan 401 is connected to the air inlet 103 , and the first control valve 402 and the first heating device 403 are both connected between the fan 401 and the air inlet 103 .

[0055] In this embodiment, under the driving action of the fan 401 , the carrier airflow passes through the first control valve 402 and the first heating device 403 and enters into the housing 1 .

[0056] The first control valve 402 can control the amount of gas entering the shell 1, so that the humidity of the exhaust gas from the shell 1 can be adjusted to avoid excessive humidity of the exhaust gas, which may cause condensation at the exhaust port and cause the problem of liquid effluent backflow. For example, when the humidity of the exhaust gas increases, the valve opening of the first control valve 402 can be increased to increase the gas phase flow in the shell 1, thereby reducing the relative humidity of the discharged gas. It is understandable that if the humidity of the exhaust gas needs to be increased, the valve opening of the first control valve 402 can be reduced.

[0057] The temperature of the carrier gas can be adjusted by the first heating device 403, so that the humidity of the exhaust gas from the housing 1 can also be adjusted to avoid excessive humidity of the exhaust gas, which may cause condensation at the exhaust port and cause the problem of liquid effluent backflow. For example, when the humidity of the exhaust gas increases, the power of the first heating device 403 can be reduced, thereby reducing the temperature of the carrier gas and the driving force of gas-liquid mass transfer, so that the relative humidity of the exhaust gas is reduced. It can be understood that if the humidity of the exhaust gas needs to be increased, the power of the first heating device 403 can be increased.

[0058] In some embodiments provided by the present invention, the liquid effluent to gaseous discharge system further includes a humidity detection device 7 , an ambient temperature detection device and a control component 5 .

[0059] The humidity detection device 7 is provided at the exhaust port 102 and is used to detect the humidity value of the exhaust gas. For example, the humidity detection device 7 includes but is not limited to a hygrometer or a dew point meter. The ambient temperature detection device is used to detect the ambient temperature, and the ambient temperature detection device can be set as a thermometer. Both the humidity detection device 7 and the ambient temperature detection device are electrically connected to the control component 5.

[0060] The control component 5 is used to calculate the corresponding saturated humidity according to the ambient temperature, that is, the saturated humidity is the saturated humidity at the current ambient temperature. When the humidity value is greater than or equal to the preset percentage of the saturated humidity, the opening of the first control valve 402 is controlled to increase and / or the power of the first heating device 403 is controlled to decrease.

[0061] In this embodiment, when the humidity value of the exhaust gas from the housing 1 is greater than or equal to the preset percentage of the saturated humidity, it means that if the humidity value of the exhaust gas further increases, condensation is likely to form at the exhaust port. At this time, the opening of the control valve is increased to increase the gas phase flow rate in the housing 1, thereby reducing the relative humidity of the exhaust gas. Alternatively, the power of the first heating device 403 is reduced to reduce the temperature of the carrier gas and the driving force of the gas-liquid mass transfer, so that the relative humidity of the exhaust gas is reduced, thereby avoiding the problem of reflux caused by the precipitation of condensed water from the exhaust gas.

[0062] In this way, by comparing the humidity value with the preset percentage of the saturated humidity, the humidity value fluctuation can have a certain margin, thereby avoiding the problem of condensation caused by the humidity value of the exhaust gas exceeding the preset percentage of the saturated humidity. Based on the ambient temperature, the corresponding saturated humidity is calculated, and it is possible to more accurately determine whether the humidity value of the exhaust gas will cause condensation at the current ambient temperature, so as to timely and accurately control the first control valve 402 and the first heating device 403, thereby improving the control accuracy and avoiding the phenomenon of condensation reflux.

[0063] In some embodiments provided by the present invention, when the humidity value is less than a preset percentage of the saturated humidity, the power of the first heating device 403 is controlled to increase. By increasing the power of the first heating device 403, the temperature of the carrier gas can be increased to increase the driving force of gas-liquid mass transfer, thereby increasing the relative humidity of the discharged gas, thereby improving the processing efficiency of the liquid effluent to gaseous discharge system.

[0064] In some embodiments provided by the present invention, the air supply branch 4 includes a fan 401 and a drying device 404. The inlet end of the drying device 404 is connected to the air outlet end of the fan 401, and the outlet end of the drying device 404 is connected to the air inlet 103.

[0065] In areas with high humidity or in climates with high humidity, the moisture content in the air is high, resulting in poor mass transfer exchange between the carrier gas and the liquid effluent. In this embodiment, by providing a drying device 404 between the fan 401 and the housing 1, the carrier gas can be dried by the drying device 404 to reduce the influence of the high moisture content in the air on the mass transfer exchange between the carrier gas and the liquid effluent, so that the liquid effluent to gaseous discharge system can be better applied to areas or climates with high humidity.

[0066] Optionally, the drying device 404 is disposed between the fan 401 and the first heating device 403 .

[0067] Optionally, the drying device 404 includes but is not limited to a refrigerated dryer or a molecular sieve dryer.

[0068] In some embodiments provided by the present invention, the gas supply branch 4 also includes an exhaust branch 405 , the number of drying devices 404 is set to at least two, the drying devices 404 are all set to be regenerable drying devices 404 , and the outlet ends of the drying devices 404 are all connected to the exhaust branch 405 .

[0069] In this embodiment, by setting an emptying branch 405 and at least two drying devices 404, the two drying devices 404 can be operated and regenerated in turn, thereby ensuring the drying effect of the drying device 404 on the carrier gas, and ensuring that the liquid effluent can be transferred to other systems for continuous operation. For example, when the drying effect of one of the drying devices 404 decreases, the other drying device 404 can be turned on, and then the outlet end of the drying device 404 with the decreased drying effect is connected to the emptying branch 405. The inlet ends of the two drying devices 404 are both connected to the fan 401. Under the action of the fan 401, a part of the carrier gas enters the drying device 404 that is working normally, and enters the housing 1 after drying. Another part of the carrier gas enters the drying device 404 to be regenerated, purges the moisture in the drying device 404, and finally discharges it through the emptying branch 405. The drying device 404 that has been purged and regenerated can be used when the drying effect of the other drying device 404 decreases.

[0070] In some embodiments provided by the present invention, the air supply branch 4 also includes a second heating device 406, the inlet end of the second heating device 406 is connected to the outlet end of the fan 401, and the outlet end of the second heating device 406 is respectively connected to the inlet end of each drying device 404.

[0071] In this embodiment, by providing a second heating device 406, the carrier gas that is about to enter the drying device 404 can be heated during the purging and regeneration process of the drying device 404. Since hot air has a higher water carrying capacity than cold air, hot purge can more effectively carry away moisture, so that the moisture in the drying device 404 can be discharged more quickly, thereby improving the regeneration efficiency of the drying device 404.

[0072] Optionally, at least one of the first heating device 403 and the second heating device 406 is configured as an electric heating device or a heat pump heating device.

[0073] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A liquid effluent to gaseous discharge system, characterized in that: include: A shell (1), wherein the top end of the shell (1) is provided with a liquid inlet (101) and an exhaust port (102), and the bottom end of the shell (1) is provided with an air inlet (103); A carrier plate (2), wherein the number of the carrier plates (2) is set to be multiple, and along the height direction of the shell (1), the multiple carrier plates (2) are sequentially distributed in the shell (1), the carrier plates (2) are all connected to the shell (1), and a circulation channel (105) is provided between the carrier plate (2) and the inner wall of the shell (1) and / or on the carrier plate (2); a liquid supply branch (3), wherein the liquid outlet end of the liquid supply branch (3) is connected to the liquid inlet (101), and the liquid supply branch (3) is used to provide liquid outflow to the shell (1); An air supply branch (4), the air outlet end of the air supply branch (4) being connected to the air inlet (103), and the air supply branch (4) being used to provide carrier gas to the shell (1).

2. The liquid effluent to gaseous discharge system according to claim 1, characterized in that: The flow channels (105) of any two adjacent carrier plates (2) are staggered with respect to each other in the height direction of the housing (1).

3. The liquid effluent to gaseous discharge system according to claim 1, characterized in that: The carrier plate (2) comprises a bottom plate (201) and a side plate (202); Part of the edge of the bottom plate (201) is connected to the inner wall of the shell (1), and there is a distance between another part of the edge of the bottom plate (201) and the inner wall of the shell (1) to form the circulation channel (105), and the edge of the bottom plate (201) not connected to the shell (1) is connected to the side plate (202), and the bottom plate (201), the side plate (202) and the inner wall of the shell (1) form a liquid storage tank.

4. The liquid effluent to gaseous discharge system according to claim 1, characterized in that: The liquid supply branch (3) comprises a circulation tank (301) and a pumping device (302), wherein the liquid inlet end of the pumping device (302) is connected to the liquid outlet end of the circulation tank (301), and the liquid outlet end of the pumping device (302) is connected to the liquid inlet (101). The bottom end of the shell (1) is also provided with a liquid outlet (104), and the liquid outlet (104) is connected to the liquid inlet end of the circulation tank (301).

5. The liquid effluent to gaseous discharge system according to claim 4, characterized in that: It also comprises a specific activity detection device, a control component (5) and a liquid discharge branch (6), wherein the specific activity detection device is used to detect the specific activity of the liquid in the circulation tank (301), the liquid discharge branch (6) is connected to the liquid outlet end of the circulation tank (301), the specific activity detection device and the liquid discharge branch (6) are both electrically connected to the control component (5), and when the control component (5) determines that the specific activity is greater than a specific activity threshold, it controls the liquid discharge branch (6) to open.

6. The liquid effluent to gaseous discharge system according to claim 1, characterized in that: The air supply branch (4) comprises a fan (401), a first control valve (402) and a first heating device (403); the air outlet end of the fan (401) is connected to the air inlet (103); the first control valve (402) and the first heating device (403) are both connected between the fan (401) and the air inlet (103).

7. The liquid effluent to gaseous discharge system according to claim 6, characterized in that: It also includes a humidity detection device (7), an ambient temperature detection device and a control component (5); The humidity detection device (7) is arranged at the exhaust port (102) and is used to detect the humidity value of the exhaust gas, the ambient temperature detection device is used to detect the ambient temperature, and both the humidity detection device (7) and the ambient temperature detection device are electrically connected to the control component (5); The control component (5) is used to calculate the corresponding saturated humidity according to the ambient temperature, and when the humidity value is greater than or equal to a preset percentage of the saturated humidity, control the opening of the first control valve (402) to increase and / or control the power of the first heating device (403) to decrease.

8. The liquid effluent to gaseous discharge system according to claim 1, characterized in that: The air supply branch (4) comprises a fan (401) and a drying device (404), the inlet end of the drying device (404) is connected to the air outlet end of the fan (401), and the outlet end of the drying device (404) is connected to the air inlet (103).

9. The liquid effluent to gaseous discharge system according to claim 8, characterized in that: The air supply branch (4) further comprises an exhaust branch (405), the number of the drying devices (404) is set to at least two, the drying devices (404) are all set to be regenerable drying devices (404), and the outlet ends of the drying devices (404) are all connected to the exhaust branch (405).

10. The liquid effluent to gaseous discharge system according to claim 9, characterized in that: The air supply branch (4) further comprises a second heating device (406), the inlet end of the second heating device (406) being connected to the outlet end of the fan (401), and the outlet end of the second heating device (406) being respectively connected to the inlet end of each drying device (404).

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