Dry and wet combined air cooler performance testing device

Abstract

The utility model relates to the technical field of air cooler performance testing, in particular to a dry and wet combined type air cooler performance testing device. Comprising a dry-wet combined air cooler, a medium parameter measuring system comprises a medium conveying pipeline and a medium discharging pipeline, and the medium conveying pipeline and the medium discharging pipeline are each provided with a flowmeter, a temperature sensor and a pressure detection device; the spray water parameter measuring system comprises an external water pipe, and the external water pipe is provided with a flow meter, a pressure detection device and a temperature sensor; the air parameter measuring system comprises an air inlet temperature sensor, an air inlet differential pressure gauge, an air humidity sensor, an air outlet differential pressure gauge, an air speed measuring device and an air outlet temperature sensor. The performance testing device can test the heat transfer performance of the dry-wet combined air cooler under the actual working condition, verifies the energy-saving effect of the dry-wet combined air cooler, facilitates optimization and improvement of the dry-wet combined air cooler according to test data, and promotes the development of the dry-wet combined air cooler.

Description

TECHNICAL FIELD

[0001] The utility model relates to air cooler performance test technical field especially is related to a dry and wet combination formula air cooler performance test device. BACKGROUND

[0002] Air cooler is a kind of wall heat exchanger, air is heated by fan and flows through the heat of heat medium in absorption pipe outside heat exchange pipe, heat medium is cooled or condensed in the process of flowing in heat exchange pipe, and finally air is discharged into atmosphere.

[0003] According to the cooling mode outside pipe, air cooler is mainly divided into dry air cooler, wet air cooler, dry and wet combination formula air cooler.Dry and wet combination formula air cooler is used in combination with dry air cooling and wet air cooling, air is first humidified and then traverses wet cooling heat exchange pipe, and then passes through dry cooling heat exchange pipe;Hot fluid is first cooled in dry cooling heat exchange pipe, and then enters wet cooling heat exchange pipe to be further cooled, and the temperature of fluid in pipe can be reduced to below ambient temperature.Dry and wet combination formula air cooler has the advantages of large wet air cooling heat exchange coefficient and dry air cooling water saving.

[0004] At present, commonly used air cooler performance test device is only suitable for testing conventional dry air cooler, such as the patent document with publication number CN212808132U discloses a heat exchange performance detection device for air cooler, and the patent document with publication number CN106769159A discloses an air cooler performance detection system.At present, there is no device that can test the actual heat transfer performance of dry and wet combination formula air cooler in production application, and the heat transfer effect of this type of product cannot be quantitatively evaluated, which hinders the speed of research and development, test demonstration, technological innovation and energy efficiency upgrading of dry and wet combination formula air cooler.Therefore, the utility model is proposed. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a dry and wet combination formula air cooler performance test device, which can test the heat transfer performance of dry and wet combination formula air cooler, and is helpful to promote the development of dry and wet combination formula air cooler field.

[0006] The utility model provides a dry and wet combination formula air cooler performance test device, which comprises a dry and wet combination formula air cooler,

[0007] Further comprising medium parameter measurement system, spray water parameter measurement system and air parameter measurement system, the medium parameter measurement system comprises medium conveying pipeline and medium discharge pipeline connected with the dry and wet combination formula air cooler, the first flowmeter, first pressure detection device and first temperature sensor are equipped on the medium conveying pipeline, the second flowmeter, second temperature sensor and second pressure detection device are equipped on the medium discharge pipeline;

[0008] The spray water parameter measurement system includes an external water pipe, the two ends of which are connected to the water tank and the spray pipe inside the dry-wet combined air cooler, respectively. The external water pipe is equipped with a third flow meter, a third pressure detection device, and a third temperature sensor.

[0009] The air parameter measurement system includes an air inlet temperature sensor, an air inlet differential pressure gauge, an air humidity sensor, an air outlet differential pressure gauge, an air speed measuring device, and an air outlet temperature sensor, all installed on the dry-wet combined air cooler.

[0010] Furthermore, the dry-wet combined air cooler includes a shell, inside which, from top to bottom, are a dry cooling heat exchange tube, a spray tube, a wet cooling heat exchange tube, and a water tank. The dry cooling heat exchange tube and the wet cooling heat exchange tube are connected by a medium connecting pipe, which is equipped with a fourth flow meter, a fourth temperature sensor, and a fourth pressure detection device. An air inlet is provided on the lower part of the side wall of the shell, located below the wet cooling heat exchange tube. An air outlet is provided on the top of the shell, and a fan is provided at the air outlet.

[0011] Furthermore, the air inlet temperature sensor and the air differential pressure gauge are installed at the air inlet, the air outlet differential pressure gauge, the wind speed measuring device and the air outlet temperature sensor are installed at the air outlet, and the air humidity sensor is installed on the dry-cool heat exchange tube.

[0012] Furthermore, the spray water parameter measurement system also includes a thermocouple installed on the wet cooling heat exchange tube; a water pump is provided on the external water pipe.

[0013] Furthermore, the inlet of the dry-cooling heat exchange tube is connected to the medium inlet of the dry-wet combined air cooler, and the outlet of the wet-cooling heat exchange tube is connected to the medium outlet of the dry-wet combined air cooler.

[0014] Furthermore, the medium conveying pipeline is connected to the dry-wet combined air cooler via a first adapter, and the medium discharge pipeline is connected to the dry-wet combined air cooler via a second adapter.

[0015] Furthermore, both the first adapter and the second adapter are flexible hoses with flanges at both ends.

[0016] Furthermore, the medium parameter measurement system also includes a medium storage tank, which is connected to the medium delivery pipeline and the medium discharge pipeline, respectively.

[0017] Furthermore, a medium delivery pump is installed on the medium delivery pipeline; a level gauge is installed on the medium storage tank.

[0018] Further, the medium storage tank is internally provided with a plurality of fifth temperature sensors, and the medium storage tank is internally provided with a heating device and a stirring device; the medium storage tank is provided with a liquid feeding pipe and a liquid discharging pipe.

[0019] In summary, the utility model has the advantages of:

[0020] The technical scheme of the utility model performs performance test on the dry-wet combined air cooler, transports test medium to the dry-wet combined air cooler through the medium conveying pipeline, makes the internal tube passage of the dry-wet combined air cooler be filled with the test medium, then discharges the test medium through the medium discharging pipeline, detects the flow, pressure and temperature data of the test medium entering and exiting the dry-wet combined air cooler to be tested through the medium parameter measurement system, opens the spray pipe after the tube passage is filled, measures and detects the flow, pressure and temperature of the spray water through the spray water parameter measurement system, uses the fan of the dry-wet combined air cooler to suck air from the air inlet and discharge the air from the air outlet, and detects the air temperature difference, pressure difference, air humidity and outlet air speed before and after the airflow passes through the dry-wet combined air cooler to be tested through the air parameter measurement system.

[0021] The performance test device can test the heat transfer performance of the dry-wet combined air cooler under actual working conditions, and the test data are uploaded to the computer for heat transfer calculation, so that the heat transfer performance test and flow resistance performance test of the dry-wet combined air cooler under different working conditions in actual application are completed, the energy-saving effect of the dry-wet combined air cooler to be tested is verified, the dry-wet combined air cooler can be optimized and improved according to the test data by the R&D personnel, the dry-wet combined air cooler with good heat exchange effect is obtained, the R&D and innovation of the dry-wet combined air cooler are accelerated, and the energy efficiency of the dry-wet combined air cooler is promoted. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the utility model or the technical scheme in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0023] Figure 1 It is a structural schematic view of the performance test device in the embodiments of the utility model.

[0024] Explanation of reference numerals: 1-dry-wet combined air cooler; 101-fan; 102-dry cooling heat exchange pipe; 103-spraying pipe; 1031-spraying adjusting valve; 104-wet cooling heat exchange pipe; 105-water tank; 106-medium connecting pipe; 1061-fourth flow meter; 1062-fourth temperature sensor; 1063-fourth pressure detecting device; 201-medium storage tank; 2011-fifth temperature sensor; 2012-liquid level meter; 2013-stirring device; 2014-liquid adding pipe; 2015-liquid discharging pipe; 202-medium conveying pipe; 2021-first flow meter; 2022-first pressure detecting device; 2023-first temperature sensor; 203-medium discharging pipe; 2031-second flow meter; 2032-second temperature sensor; 2033-second pressure detecting device; 204-medium conveying pump; 205-first adapter; 206-second adapter; 301-external water pipe; 302-water pump; 303-third flow meter; 304-third pressure detecting device; 305-third temperature sensor; 306-thermocouple; 401-air inlet temperature sensor; 402-air inlet differential pressure gauge; 403-air humidity sensor; 404-air outlet differential pressure gauge; 405-air speed measuring device; 406-air outlet temperature sensor. DETAILED DESCRIPTION

[0025] The technical solutions of the present application will be described below in conjunction with the embodiments, obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise explicitly specified. In addition, the terms "mounting", "connecting", "connection" should be broadly understood, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] Embodiment

[0029] A dry-wet combined air cooler performance testing device, as shown in Figure 1 It comprises a dry-wet combined air cooler 1, a medium parameter measurement system, a spray water parameter measurement system and an air parameter measurement system which are conventional in the art.

[0030] The dry-wet combined air cooler 1 comprises a shell, the lower part of the side wall of the shell is provided with an air inlet, and the top is provided with an air outlet, a fan 101 is installed at the air outlet, and the inside of the shell is sequentially provided with a dry cooling heat exchange pipe 102, a spray pipe 103, a wet cooling heat exchange pipe 104 and a water tank 105 from top to bottom, and a plurality of spray adjusting valves 1031 are arranged on the spray pipe 103. The air inlet of the shell is located below the wet cooling heat exchange pipe 104. The upper part of the side wall of the shell is provided with a medium inlet, and the lower part is provided with a medium outlet, the inlet of the dry cooling heat exchange pipe 102 is connected with the medium inlet, the outlet of the dry cooling heat exchange pipe 102 is connected with the inlet of the wet cooling heat exchange pipe 104 through a medium connecting pipe 106, and the outlet of the wet cooling heat exchange pipe 104 is connected with the medium outlet, that is, the test medium enters the dry cooling heat exchange pipe 102 through the medium inlet, flows downward to the wet cooling heat exchange pipe 104 through the medium connecting pipe 106, and finally is discharged through the outlet of the wet cooling heat exchange pipe 104.

[0031] The medium parameter measurement system comprises a medium storage tank 201, which is connected with a medium conveying pipeline 202 and a medium discharge pipeline 203. The medium conveying pipeline 202 is connected with the medium inlet of the dry-wet combined air cooler 1 through a first adapter 205, and a medium conveying pump 204 is installed on the medium conveying pipeline 202; the medium discharge pipeline 203 is connected with the medium outlet of the dry-wet combined air cooler 1 through a second adapter 206. The first adapter 205 and the second adapter 206 are both hoses with flanges at both ends, which are convenient to move and match, and can realize the quick installation and batch performance testing of dry-wet combined air coolers of different specifications and models.

[0032] The medium conveying pipeline 202 is provided with a first flow meter 2021, a first pressure detection device 2022 and a first temperature sensor 2023 for detecting the flow, pressure and temperature of the medium entering the dry-wet combined air cooler 1; the medium discharging pipeline 203 is provided with a second flow meter 2031, a second temperature sensor 2032 and a second pressure detection device 2033 for detecting the flow, temperature and pressure of the medium discharged from the dry-wet combined air cooler 1. The medium connecting pipeline 106 is provided with a fourth flow meter 1061, a fourth temperature sensor 1062 and a fourth pressure detection device 1063 for detecting the flow, temperature and pressure of the medium entering the dry cooling heat exchange pipeline 102 and the wet cooling heat exchange pipeline 104.

[0033] The medium storage tank 201 is provided with a heating device and a stirring device 2013, and the fifth temperature sensor 2011 is arranged in the medium storage tank 201 in four directions of up, down, left and right. The medium storage tank 201 is also provided with a liquid adding pipe 2014 and a liquid discharging pipe 2015, so that the test medium can be quickly supplemented or replaced according to the actual use process medium. The medium storage tank 201 is also provided with a liquid level meter 2012.

[0034] The spray water parameter measurement system includes an external water pipe 301, both ends of the external water pipe 301 are connected with the water tank 105 and the spray pipe 103 inside the dry-wet combined air cooler 1, and the external water pipe 301 is provided with a water pump 302, a third flow meter 303, a third pressure detection device 304 and a third temperature sensor 305; the system also includes a thermocouple 306 arranged on the wet cooling heat exchange pipeline 104, and when multiple thermocouples 306 are arranged, they are uniformly distributed on the wet cooling heat exchange pipeline 104. The spray water parameter measurement system can adjust and collect data of the water temperature, flow and pressure of the spray pipeline, and can also collect the water film temperature of the wet cooling heat exchange pipeline 104 in real time through the thermocouple 306.

[0035] The air parameter measurement system includes an air inlet temperature sensor 401, an air inlet differential pressure gauge 402, an air humidity sensor 403, an air outlet differential pressure gauge 404, a wind speed measuring device 405 and an air outlet temperature sensor 406 arranged in sequence along the air flow direction; wherein the air inlet temperature sensor 401 and the air inlet differential pressure gauge 402 are arranged at the air inlet, and the air outlet differential pressure gauge 404, the wind speed measuring device 405 and the air outlet temperature sensor 406 are all arranged at the air outlet; the air humidity sensor 403 is arranged on the dry cooling heat exchange pipeline 102.

[0036] The use method of the performance testing device is as follows: during testing, the dry-wet combined air cooler 1 to be tested is started, the medium for testing is selected and added into the medium storage tank 201, the testing medium is heated to a specified testing temperature by using the heating device, the stirring device 2013 and the fifth temperature sensor 2011, the medium conveying pump 204 is started, the testing medium enters the dry cooling heat exchange pipe 102 through the medium conveying pipeline 202, and flows downward to the wet cooling heat exchange pipe 104 through the medium connecting pipe 106, until the pipe passage of the dry-wet combined air cooler 1 is filled. The wet cooling heat exchange pipe 104 is the outlet of the pipe passage of the dry-wet combined air cooler 1, and when running, the high-temperature testing medium at the inlet becomes low-temperature medium at the outlet, and returns to the medium storage tank 201 through the medium discharge pipeline 203.

[0037] After the pipe passage is filled, the water pump 302 is started, the spraying water enters the spraying pipe 103 through the water pump 302, the third flow meter 303, the third pressure detection device 304 and the third temperature sensor 305, and is uniformly sprayed after being adjusted by the spraying adjusting valve 1031 in terms of spraying flow and spraying pressure. One end of the spraying pipe 103 is connected with the water pump 302, and the other end is sealed by a blind plate. The spraying water is uniformly formed into a film on the wet cooling heat exchange pipe 104 and flows downward, and finally falls back to the water tank 105. The thermocouple 306 on the wet cooling heat exchange pipe 104 detects the temperature of the spraying water film outside the pipe.

[0038] The fan 101 of the dry-wet combined air cooler 1 is used to suck air from the air inlet, so that the air flows upward through the wet cooling pipe disc 104, the spraying pipe 103 and the dry cooling heat exchange pipe 102 in sequence, forms counterflow with the spraying water, and finally is discharged into the atmosphere by the fan 101.

[0039] During the above process, the first flow meter 2021, the first pressure detection device 2022, the first temperature sensor 2023, the fourth flow meter 1061, the fourth temperature sensor 1062, the fourth pressure detection device 1063, the second flow meter 2031, the second temperature sensor 2032 and the second pressure detection device 2033 in the medium parameter measurement system collect the flow, temperature and pressure data of the testing medium entering the dry cooling heat exchange pipe 102, the testing medium out of the dry cooling heat exchange pipe 102, the testing medium entering the wet cooling heat exchange pipe 104 and the testing medium out of the wet cooling heat exchange pipe 104, obtain the flow difference, pressure difference and temperature difference of the testing medium before and after passing through the dry-wet combined air cooler 1 to be tested, and the flow difference, pressure difference and temperature difference between the dry air cooler and the wet air cooler, and synchronously collect the collected data to the computer system to calculate the fluid medium side heat load, the in-pipe heat transfer coefficient and the total heat transfer coefficient of the dry air cooler, the wet air cooler and the dry-wet combined air cooler, respectively.

[0040] The air inlet temperature sensor 401 and the air outlet temperature sensor 406 in the air parameter measurement system detect the airflow temperature at the air inlet and the airflow temperature just passing through the dry-wet combined air cooler 1, that is, the airflow temperature at the air outlet, so as to obtain the temperature difference of the airflow before and after passing through the dry-wet combined air cooler 1.

[0041] The air inlet temperature sensor 401, the air inlet pressure difference meter 402, the air humidity sensor 403, the air outlet pressure difference meter 404 and the air outlet temperature sensor 406 in the utility model all adopt sensor detection, and the collected data is accurate and reliable, and the detection sensitivity is high. In addition, the first temperature sensor 2023, the second temperature sensor 2032, the third temperature sensor 305, the fourth temperature sensor 1062 and the fifth temperature sensor 2011 are all liquid temperature sensors; all the pressure detection devices are liquid pressure detection devices, and adopt pressure transmitters; and all the flow meters are turbine flow meters.

[0042] The liquid in the medium storage tank 201 can be water, deionized water, oil and other actual working condition media.

[0043] Meanwhile, the first temperature sensor 2023, the second temperature sensor 2032, the third temperature sensor 305, the fourth temperature sensor 1062, the fifth temperature sensor 2011, the first flow meter 2021, the second flow meter 2031, the third flow meter 303, the fourth flow meter 1061, the first pressure detection device 2022, the second pressure detection device 2033, the third pressure detection device 304, the fourth pressure detection device 1063, the spray adjusting valve 1031, the thermocouple 306, the air inlet temperature sensor 401, the air inlet pressure difference meter 402, the air humidity sensor 403, the air outlet pressure difference meter 404, the air speed measuring device 405, the air outlet temperature sensor 406 and the liquid level meter 2012 all have two or more, and are connected with a computer through a data acquisition system, so that the measurement data is uploaded to the computer, high-precision measurement and collection of humidity, temperature, pressure, flow and other parameters are realized, the heat transfer coefficient of the dry-wet combined air cooler is calculated through the detected data, and the dry-wet combined air cooler heat transfer performance test experiment is completed.

[0044] The test pipeline and the spray pipeline all adopt S304 stainless steel materials, so that the test requirements of different media can be realized.

[0045] In the present embodiment, the calculation method of the air-side heat load, the fluid medium-side heat load, the heat transfer coefficient and the total heat transfer coefficient of the dry-wet combined air cooler 1 to be tested has been disclosed in GB / T 27698.1-2023 "Heat Exchanger and Heat Transfer Element Performance Test Method Part 1: General Requirements", GB / T 27698.2-2023 "Heat Exchanger and Heat Transfer Element Performance Test Method Part 2: Heat Exchanger", which belongs to the prior art, and therefore the calculation principle will not be described again.

[0046] The dry-wet combined air cooler performance test device provided by the present application can provide heat transfer performance test for dry-wet combined air coolers of different specifications and models under different working conditions, and the test results are of great significance for evaluating the performance of dry-wet combined air coolers, optimizing operating conditions and achieving energy saving and consumption reduction.

[0047] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A performance testing device for a dry-wet combined air cooler, comprising a dry-wet combined air cooler (1), characterized in that, It also includes a media parameter measurement system, a spray water parameter measurement system, and an air parameter measurement system. The media parameter measurement system includes a media conveying pipe (202) and a media discharge pipe (203) connected to the dry-wet combined air cooler (1). The media conveying pipe (202) is equipped with a first flow meter (2021), a first pressure detection device (2022), and a first temperature sensor (2023). The media discharge pipe (203) is equipped with a second flow meter (2031), a second temperature sensor (2032), and a second pressure detection device (2033). The spray water parameter measurement system includes an external water pipe (301), the two ends of which are connected to the water tank (105) and the spray pipe (103) inside the dry and wet combined air cooler (1), respectively. The external water pipe (301) is equipped with a third flow meter (303), a third pressure detection device (304), and a third temperature sensor (305). The air parameter measurement system includes an air inlet temperature sensor (401), an air inlet differential pressure gauge (402), an air humidity sensor (403), an air outlet differential pressure gauge (404), a wind speed measuring device (405), and an air outlet temperature sensor (406) installed on the dry and wet combined air cooler (1).

2. The performance testing device according to claim 1, characterized in that, The dry-wet combined air cooler (1) includes a shell, inside which, from top to bottom, are a dry-cooling heat exchange tube (102), a spray tube (103), a wet-cooling heat exchange tube (104), and a water tank (105). The dry-cooling heat exchange tube (102) and the wet-cooling heat exchange tube (104) are connected by a medium connecting pipe (106). The medium connecting pipe (106) is equipped with a fourth flow meter (1061), a fourth temperature sensor (1062), and a fourth pressure detection device (1063). An air inlet is provided at the lower part of the side wall of the shell, and the air inlet is located below the wet-cooling heat exchange tube (104). An air outlet is provided at the top of the shell, and a fan (101) is provided at the air outlet.

3. The performance testing device according to claim 2, characterized in that, The air inlet temperature sensor (401) and the air inlet differential pressure gauge (402) are located at the air inlet. The air outlet differential pressure gauge (404), the wind speed measuring device (405), and the air outlet temperature sensor (406) are all located at the air outlet. The air humidity sensor (403) is located on the dry-cool heat exchange tube (102).

4. The performance testing device according to claim 2, characterized in that, The spray water parameter measurement system also includes a thermocouple (306) installed on the wet cooling heat exchange tube (104); a water pump (302) is provided on the external water pipe (301).

5. The performance testing device according to claim 2, characterized in that, The inlet of the dry-cooled heat exchange tube (102) is connected to the medium inlet of the dry-wet combined air cooler (1), and the outlet of the wet-cooled heat exchange tube (104) is connected to the medium outlet of the dry-wet combined air cooler (1).

6. The performance testing apparatus according to claim 1, characterized in that, The medium conveying pipeline (202) is connected to the dry-wet combined air cooler (1) through the first adapter (205), and the medium discharge pipeline (203) is connected to the dry-wet combined air cooler (1) through the second adapter (206).

7. The performance testing apparatus according to claim 6, characterized in that, Both the first adapter (205) and the second adapter (206) are flexible hoses with flanges at both ends.

8. The performance testing apparatus according to claim 1, characterized in that, The medium parameter measurement system also includes a medium storage tank (201), which is connected to the medium conveying pipeline (202) and the medium discharge pipeline (203) respectively.

9. The performance testing apparatus according to claim 8, characterized in that, The medium conveying pipeline (202) is equipped with a medium conveying pump (204); the medium storage tank (201) is equipped with a level gauge (2012).

10. The performance testing apparatus according to claim 8, characterized in that, The medium storage tank (201) is equipped with multiple fifth temperature sensors (2011), and the medium storage tank (201) is equipped with a heating device and a stirring device (2013); the medium storage tank (201) is equipped with a liquid addition pipe (2014) and a liquid discharge pipe (2015).

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