Visual analysis and test system for discharge characteristics of working medium in closed condenser

Abstract

The invention discloses a visual analysis and test system for discharge characteristics of a working medium in a closed condenser, and relates to the technical field of additional fluid discharge of a condenser of an energy power system. The problems that when simulation testing is conducted on a condenser in the prior art, visual observation cannot be conducted on the interior of the condenser, and due to the fact that baffles in the condenser are directly welded to a shell, the performance of baffles with different inclination angles cannot be tested are solved. The detachable working medium discharge unit structure is adopted, and a baffle in the detachable working medium discharge unit on the closed condenser can be replaced, so that the performance of baffles with different inclination angles can be tested, and the experiment time and the experiment cost are greatly reduced; and finally, the upper layer, the middle layer and the lower layer of the interior of the closed condenser are each provided with a miniature underwater camera, flow pattern and flow field shooting is conducted through the miniature underwater cameras, and visual observation of the interior of the condenser is achieved. The invention is suitable for the technical field of closed condenser detection.

Description

Technical Field

[0001] The invention relates to the technical field of additional fluid discharge of a condenser of an energy power system, and in particular to a visual analysis and testing system for working fluid discharge characteristics in a closed condenser. Background Art

[0002] As one of the most important components of the energy power system, the cold end system plays an important role in maintaining the back pressure of the steam turbine and ensuring the efficient operation of the energy power cycle system. At the same time, as the only cold source of the entire system, it also bears the functions of various drainage, exhaust steam and other discharges and condensation. However, during the discharge of these exhaust steam and drainage, it is very likely to cause impact damage to the condenser and the heat exchange tube bundle inside the condenser, thereby threatening the safety and efficiency of the condenser operation. Therefore, it is necessary to test and analyze the drainage and exhaust steam emission characteristics of various energy levels in the condenser.

[0003] Since there are many types of working fluids discharged into the condenser, including steam, subcooled water, high-temperature water, superheated water, etc., and the discharge amounts of different working fluids are also different, this puts higher demands on the working fluid supply system of the experimental system. It costs a lot of cost to provide working fluids that meet the above conditions, and the volume of the system's additional system is very large.

[0004] In addition, due to the presence of a large number of tube bundles in the condenser, the space left for additional fluid discharge baffles is extremely limited, so the baffles are generally welded directly to the inside of the condenser at one time. However, the experiment needs to test the effects of different baffles and the influence of the distance between the baffle and the discharge port. It is difficult to achieve the above goals using traditional solutions and processes.

[0005] Finally, in order to explore the impact of drains of different energy levels discharged into the condenser, it is necessary to capture the drain discharge form or the phase state of drains entering the high vacuum condenser. However, in order to ensure the tightness of the condenser, the shell can only be made of steel, so visual observation is not possible; and there are a large number of tube bundles in the condenser, and even with a visualization window it is difficult to meet the experimental requirements.

[0006] In summary, during the existing simulation test of the condenser, it is impossible to visually observe the inside of the condenser, and because the baffle inside the condenser is directly welded to the shell, it leads to the problem that the performance of the baffle at different inclination angles cannot be tested. Summary of the invention

[0007] The present invention aims to solve the problem that, during the existing simulation test of the condenser, the interior of the condenser cannot be visually observed, and since the baffle inside the condenser is directly welded to the shell, the performance of the baffles at different inclination angles cannot be tested. A visual analysis test system for the working fluid emission characteristics in a closed condenser is proposed to solve the problem that, during the existing simulation test of the condenser, the interior of the condenser cannot be visually observed, and since the baffle inside the condenser is directly welded to the shell, the performance of the baffles at different inclination angles cannot be tested.

[0008] The present invention provides a visual analysis and testing system for working medium discharge characteristics in a closed condenser, which comprises a steam supply unit 1, a cold water supply unit 2, a steam-liquid jet mixing condensation boosting heating unit 3, a closed condenser 4, a circulating cooling unit 5, a detachable working medium discharge unit 6 and a vacuum pump 8;

[0009] The outer surface of the closed condenser 4 is evenly provided with three detachable working medium discharge units 6 along the circumferential direction, and the three detachable working medium discharge units 6 are arranged corresponding to the upper layer, the middle layer and the lower layer inside the closed condenser 4 at one time, the output end of the steam supply unit 1 is connected to the detachable working medium discharge unit 6 corresponding to the upper layer inside the closed condenser 4, the output end of the cold water supply unit 2 is connected to the detachable working medium discharge unit 6 corresponding to the lower layer inside the closed condenser 4, a vapor-liquid jet mixing condensation boosting heating unit 3 is provided between the steam supply unit 1 and the cold water supply unit 2, the output end of the vapor-liquid jet mixing condensation boosting heating unit 3 is connected to the detachable working medium discharge unit 6 corresponding to the middle layer inside the closed condenser 4, and the steam supply unit 1 and the cold water supply unit 2 are connected in parallel through the vapor-liquid jet mixing condensation boosting heating unit 3, the bottom cooling port of the closed condenser 4 is provided with a circulating cooling unit 5, and the top output end of the closed condenser 4 is connected to the input end of the vacuum pump 8;

[0010] Furthermore, the steam supply unit 1 includes an electric heating boiler 1-1 and a steam regulating valve 1-2, the output end of the electric heating boiler 1-1 is connected to the input end of the steam regulating valve 1-2 through a pipeline, and the output end of the steam regulating valve 1-2 is connected to the detachable working medium discharge unit 6 corresponding to the upper layer inside the closed condenser 4 through a pipeline;

[0011] Further, the cold water supply unit 2 includes a cold water tank 2-1, a water inlet pump 2-2, a cold water inlet pipe 2-3, a cold water regulating valve 2-4, a drain pump 2-5 and a cold water discharge pipe 2-6;

[0012] The output end of the cold water tank 2-1 is connected to the input end of the water inlet pump 2-2 through the cold water inlet pipe 2-3, the output end of the water inlet pump 2-2 is connected to one end of the cold water regulating valve 2-4 through the cold water inlet pipe 2-3, the other end of the cold water regulating valve 2-4 is connected to the detachable working medium discharge unit 6 corresponding to the lower layer inside the closed condenser 4, the cold water discharge end at the bottom of the closed condenser 4 is connected to the input end of the drainage pump 2-5 through the cold water discharge pipe 2-6, and the output end of the drainage pump 2-5 is connected to the return water end at the bottom of the cold water tank 2-1 through the cold water discharge pipe 2-6;

[0013] Furthermore, the steam-liquid jet mixing condensation boosting heating unit 3 comprises a steam valve 3-1, a cold water valve 3-2 and a steam-liquid jet mixing device 3-3;

[0014] The connection between the output end of the electric heating boiler 1-1 and the input end of the steam regulating valve 1-2 is connected to one end of the steam valve 3-1 through a pipeline, and the other end of the steam valve 3-1 is connected to the steam input end of the steam-liquid jet mixing device 3-3 through a pipeline. The connection between the output end of the water inlet pump 2-2 and one end of the cold water regulating valve 2-4 is connected to one end of the cold water valve 3-2 through a pipeline, and the other end of the cold water valve 3-2 is connected to the cold water input end of the steam-liquid jet mixing device 3-3 through a pipeline, and the output end of the steam-liquid jet mixing device 3-3 is connected to the detachable working medium discharge unit 6 corresponding to the middle layer inside the closed condenser 4 through a pipeline;

[0015] Furthermore, the circulating cooling unit 5 includes a cooling tower 5-1, a circulating water pump 5-2, a circulating water regulating valve 5-3 and a circulating water pipeline 5-4;

[0016] The circulation output end at the bottom of the closed condenser 4 is connected to the input end of the cooling tower 5-1 through the circulating water pipeline 5-4, the output end of the cooling tower 5-1 is connected to the input end of the circulating water pump 5-2 through the circulating water pipeline 5-4, the output end of the circulating water pump 5-2 is connected to one end of the circulating water regulating valve 5-3 through the circulating water pipeline 5-4, and the other end of the circulating water regulating valve 5-3 is connected to the circulation input end at the bottom of the closed condenser 4;

[0017] Furthermore, the detachable working medium discharge unit 6 comprises an input connection flange A, a fixed flange B and a baffle C;

[0018] One end of the fixed flange B is fixedly connected to the inside of the closed condenser 4, and the other end of the fixed flange B is detachably connected to the baffle C. After one end of the pipeline passes through the center hole of the fixed flange B, it is connected to the center hole of the baffle C. After the other end of the pipeline passes through the shell of the closed condenser 4, it is connected to one end of the input connection flange A.

[0019] Furthermore, the outer surface of the closed condenser 4 is evenly provided with three sensor signal line guide channels 7 along the circumferential direction, and a miniature underwater camera is respectively provided in the upper layer, the middle layer and the lower layer of the closed condenser 4;

[0020] Furthermore, in the steam shock experiment, the circulating cooling unit 5 is started, and when the cooling water fills the entire circulation loop, the vacuum pump 8 and the circulating water flow rate are adjusted to control the pressure value in the closed condenser 4 to reach the set value; the steam supply unit 1 is started, and the cold water supply unit 2 is started, and the inlet valve of the steam-liquid jet mixing condensation boosting heating unit 3 is opened and adjusted to form the working fluid of the required temperature and pressure. In this process, the parameters of the circulating cooling unit 5 are simultaneously controlled so that the pressure of the closed condenser 4 remains unchanged.

[0021] The pressure sensor and strain gauge installed on the detachable working fluid discharge unit 6 are used to measure the working fluid discharge impact force under different working fluid temperature and pressure conditions. At the same time, a miniature underwater camera is respectively provided in the upper layer, middle layer and lower layer of the closed condenser 4 to capture the flow pattern and flow field.

[0022] When the position of the impact baffle needs to be changed, the baffle C on the detachable working fluid discharge unit 6 is directly removed and replaced with a baffle C with a different end inclination angle, and then the above process is repeated to achieve rapid and accurate measurement of the impact characteristics of working fluid discharge at different temperatures and pressures.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention overcomes the shortcomings of the prior art and uses a two-phase gas-liquid mixing and pressurizing method to generate high-energy additional fluids at different temperatures. In the gas-liquid jet mixing condensation and pressurizing heating unit, the gas-liquid directly contacts the condensation heat transfer, and the heat transfer coefficient is as high as 1.0MW / (m2·K) or more. Therefore, the device is very small and can achieve instantaneous parameter adjustment. Compared with electric heaters of the same power level, the device volume is greatly reduced, only about 1 / 100 of it; a detachable working fluid discharge unit structure is also adopted, which can realize the replacement of the baffle in the detachable working fluid discharge unit on the closed condenser, thereby realizing the testing of the performance of the baffle at different inclination angles, greatly reducing the experimental time and experimental cost; finally, this application adopts a micro underwater camera in the upper, middle and lower layers of the closed condenser, respectively, and uses the micro underwater camera to shoot the flow type and flow field, so as to realize visual observation of the inside of the condenser. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the piping connection of the visual analysis and testing system for the working medium emission characteristics in the closed condenser according to the present invention;

[0026] Figure 2 It is a structural schematic diagram of a detachable working medium discharge unit on a closed condenser in a visual analysis and testing system for working medium discharge characteristics in a closed condenser according to the present invention;

[0027] Figure 3 It is a miniature underwater camera with its own light source;

[0028] Figure 4 This is the opening structure diagram of the closed condenser wall;

[0029] Figure 4 The black dot “·” in the figure is the arrangement position of the micro underwater camera inside the closed condenser. DETAILED DESCRIPTION

[0030] Specific implementation method 1: Combination Figure 1 The present embodiment is described as a visual analysis and testing system for working medium discharge characteristics in a closed condenser, which comprises a steam supply unit 1, a cold water supply unit 2, a steam-liquid jet mixing condensation boosting heating unit 3, a closed condenser 4, a circulating cooling unit 5, a detachable working medium discharge unit 6 and a vacuum pump 8;

[0031] The outer surface of the closed condenser 4 is evenly provided with three detachable working medium discharge units 6 along the circumferential direction, and the three detachable working medium discharge units 6 are arranged corresponding to the upper layer, the middle layer and the lower layer inside the closed condenser 4 at one time, the output end of the steam supply unit 1 is connected to the detachable working medium discharge unit 6 corresponding to the upper layer inside the closed condenser 4, the output end of the cold water supply unit 2 is connected to the detachable working medium discharge unit 6 corresponding to the lower layer inside the closed condenser 4, a vapor-liquid jet mixing condensation boosting heating unit 3 is provided between the steam supply unit 1 and the cold water supply unit 2, the output end of the vapor-liquid jet mixing condensation boosting heating unit 3 is connected to the detachable working medium discharge unit 6 corresponding to the middle layer inside the closed condenser 4, and the steam supply unit 1 and the cold water supply unit 2 are connected in parallel through the vapor-liquid jet mixing condensation boosting heating unit 3, the bottom cooling port of the closed condenser 4 is provided with a circulating cooling unit 5, and the top output end of the closed condenser 4 is connected to the input end of the vacuum pump 8;

[0032] In this specific implementation mode, in the steam shock experiment, the circulating cooling unit 5 is started, and when the cooling water fills the entire circulation loop, the vacuum pump 8 and the circulating water flow rate are adjusted to control the pressure value in the closed condenser 4 to reach the set value; the steam supply unit 1 is started, and the cold water supply unit 2 is started, and the inlet valve of the steam-liquid jet mixing condensation boosting heating unit 3 is opened and adjusted to form the working fluid of the required temperature and pressure. In this process, the parameters of the circulating cooling unit 5 are simultaneously controlled so that the pressure of the closed condenser 4 remains unchanged.

[0033] The pressure sensor and strain gauge installed on the detachable working fluid discharge unit 6 are used to measure the working fluid discharge impact force under different working fluid temperature and pressure conditions. At the same time, a miniature underwater camera is respectively provided in the upper layer, middle layer and lower layer of the closed condenser 4 to capture the flow pattern and flow field.

[0034] When the position of the impact baffle needs to be changed, the baffle C on the detachable working fluid discharge unit 6 is directly removed and replaced with a baffle C with a different end inclination angle, and then the above process is repeated to achieve rapid and accurate measurement of the impact characteristics of working fluid discharge at different temperatures and pressures.

[0035] Specific implementation method 2: Combination Figure 1The present embodiment is described as a further limitation of the test system described in the first specific embodiment. The present embodiment is a test system for visually analyzing the emission characteristics of working fluids in a closed condenser. The steam supply unit 1 comprises an electric heating boiler 1-1 and a steam regulating valve 1-2. The output end of the electric heating boiler 1-1 is connected to the input end of the steam regulating valve 1-2 through a pipeline. The output end of the steam regulating valve 1-2 is connected to a detachable working fluid emission unit 6 corresponding to the upper layer inside the closed condenser 4 through a pipeline.

[0036] Specific implementation method three: Combination Figure 1 This embodiment is described. This embodiment is a further limitation of the test system described in the second embodiment. This embodiment is a test system for visual analysis of the discharge characteristics of the working medium in the closed condenser. The cold water supply unit 2 includes a cold water tank 2-1, a water inlet pump 2-2, a cold water inlet pipe 2-3, a cold water regulating valve 2-4, a drain pump 2-5 and a cold water discharge pipe 2-6.

[0037] The output end of the cold water tank 2-1 is connected to the input end of the water inlet pump 2-2 through the cold water inlet pipe 2-3, the output end of the water inlet pump 2-2 is connected to one end of the cold water regulating valve 2-4 through the cold water inlet pipe 2-3, the other end of the cold water regulating valve 2-4 is connected to the detachable working medium discharge unit 6 corresponding to the lower layer inside the closed condenser 4, the cold water discharge end at the bottom of the closed condenser 4 is connected to the input end of the drain pump 2-5 through the cold water discharge pipe 2-6, and the output end of the drain pump 2-5 is connected to the return water end at the bottom of the cold water tank 2-1 through the cold water discharge pipe 2-6.

[0038] Specific implementation method four: Combination Figure 1 This embodiment is described. This embodiment is a further limitation of the test system described in the third embodiment. This embodiment is a visual analysis test system for the working medium emission characteristics in a closed condenser. The vapor-liquid jet mixing condensation boosting heating unit 3 includes a steam valve 3-1, a cold water valve 3-2 and a vapor-liquid jet mixing device 3-3.

[0039] The connection between the output end of the electric heating boiler 1-1 and the input end of the steam regulating valve 1-2 is connected to one end of the steam valve 3-1 through a pipeline, and the other end of the steam valve 3-1 is connected to the steam input end of the steam-liquid jet mixing device 3-3 through a pipeline. The connection between the output end of the water inlet pump 2-2 and one end of the cold water regulating valve 2-4 is connected to one end of the cold water valve 3-2 through a pipeline, and the other end of the cold water valve 3-2 is connected to the cold water input end of the steam-liquid jet mixing device 3-3 through a pipeline, and the output end of the steam-liquid jet mixing device 3-3 is connected to the detachable working medium discharge unit 6 corresponding to the middle layer inside the closed condenser 4 through a pipeline.

[0040] Specific implementation method five: Combination Figure 1 This embodiment is described. This embodiment is a further limitation of the test system described in the fourth embodiment. This embodiment is a test system for visual analysis of the emission characteristics of working fluid in a closed condenser. The circulating cooling unit 5 includes a cooling tower 5-1, a circulating water pump 5-2, a circulating water regulating valve 5-3 and a circulating water pipeline 5-4.

[0041] The circulation output end at the bottom of the closed condenser 4 is connected to the input end of the cooling tower 5-1 through the circulating water pipe 5-4, the output end of the cooling tower 5-1 is connected to the input end of the circulating water pump 5-2 through the circulating water pipe 5-4, the output end of the circulating water pump 5-2 is connected to one end of the circulating water regulating valve 5-3 through the circulating water pipe 5-4, and the other end of the circulating water regulating valve 5-3 is connected to the circulation input end at the bottom of the closed condenser 4.

[0042] Specific implementation method six: Combination Figure 1 and Figure 2 This embodiment is described. This embodiment is a further limitation of the test system described in the specific embodiment 1. This embodiment is a visual analysis test system for the working medium discharge characteristics in a closed condenser. The detachable working medium discharge unit 6 includes an input connection flange A, a fixed flange B and a baffle C.

[0043] One end of the fixed flange B is fixedly connected to the inside of the closed condenser 4, and the other end of the fixed flange B is detachably connected to the baffle C. After one end of the pipeline passes through the center hole of the fixed flange B, it is connected to the center hole of the baffle C. After the other end of the pipeline passes through the shell of the closed condenser 4, it is connected to one end of the input connection flange A.

[0044] In this specific embodiment, during the experiment, the baffle C in the detachable working medium discharge unit 6 can be replaced, so that the baffle C with different inclination angles can be tested, which greatly reduces the experimental time and test cost.

[0045] Specific implementation method seven: Combination Figures 1 to 4 This embodiment is described. This embodiment is a further limitation of the test system described in the first embodiment. This embodiment is a test system for visual analysis of the working medium emission characteristics in a closed condenser. The outer surface of the closed condenser 4 is evenly provided with three sensor signal line guide channels 7 along the circumferential direction, and a miniature underwater camera is respectively provided in the upper layer, middle layer and lower layer of the closed condenser 4.

[0046] In this specific embodiment, a micro underwater camera is respectively provided in the upper layer, the middle layer and the lower layer of the closed condenser 4, and the flow pattern and flow field are photographed by the micro underwater camera to realize visual observation of the interior of the condenser.

[0047] How it works

[0048] In the steam shock experiment, the circulating cooling unit 5 is started, and when the cooling water fills the entire circulation loop, the vacuum pump 8 and the circulating water flow rate are adjusted to control the pressure value in the closed condenser 4 to reach the set value; the steam supply unit 1 is started, and the cold water supply unit 2 is started, and the inlet valve of the steam-liquid jet mixing condensation boosting heating unit 3 is opened and adjusted to form the working medium with the required temperature and pressure. In this process, the parameters of the circulating cooling unit 5 are controlled at the same time so that the pressure of the closed condenser 4 remains unchanged.

[0049] The pressure sensor and strain gauge installed on the detachable working fluid discharge unit 6 are used to measure the working fluid discharge impact force under different working fluid temperature and pressure conditions. At the same time, a miniature underwater camera is respectively provided in the upper layer, middle layer and lower layer of the closed condenser 4 to capture the flow pattern and flow field.

[0050] When the position of the impact baffle needs to be changed, the baffle C on the detachable working fluid discharge unit 6 is directly removed and replaced with a baffle C with a different end inclination angle, and then the above process is repeated to achieve rapid and accurate measurement of the impact characteristics of working fluid discharge at different temperatures and pressures.

Claims

1. A visual analysis and testing system for the emission characteristics of working fluids in a closed condenser, characterized by: It comprises a steam supply unit (1), a cold water supply unit (2), a steam-liquid jet mixing condensation boosting heating unit (3), a closed condenser (4), a circulating cooling unit (5), a detachable working medium discharge unit (6) and a vacuum pump (8); The outer surface of the closed condenser (4) is evenly provided with three detachable working medium discharge units (6) along the circumferential direction, and the three detachable working medium discharge units (6) are arranged corresponding to the upper layer, the middle layer and the lower layer inside the closed condenser (4) at one time, the output end of the steam supply unit (1) is connected to the detachable working medium discharge unit (6) corresponding to the upper layer inside the closed condenser (4), the output end of the cold water supply unit (2) is connected to the detachable working medium discharge unit (6) corresponding to the lower layer inside the closed condenser (4), and the steam supply unit (1) A vapor-liquid jet mixing condensation boosting heating unit (3) is provided between the steam supply unit (1) and the cold water supply unit (2); the output end of the vapor-liquid jet mixing condensation boosting heating unit (3) is connected to a detachable working medium discharge unit (6) corresponding to the middle layer inside the closed condenser (4); the steam supply unit (1) and the cold water supply unit (2) are connected in parallel via the vapor-liquid jet mixing condensation boosting heating unit (3); a circulating cooling unit (5) is provided at the bottom cooling port of the closed condenser (4); and the top output end of the closed condenser (4) is connected to the input end of a vacuum pump (8).

2. A visual analysis and testing system for working medium emission characteristics in a closed condenser according to claim 1, characterized in that: The steam supply unit (1) comprises an electric heating boiler (1-1) and a steam regulating valve (1-2); the output end of the electric heating boiler (1-1) is connected to the input end of the steam regulating valve (1-2) via a pipeline; the output end of the steam regulating valve (1-2) is connected to a detachable working medium discharge unit (6) corresponding to the upper layer inside the closed condenser (4) via a pipeline.

3. A visual analysis and testing system for working medium emission characteristics in a closed condenser according to claim 2, characterized in that: The cold water supply unit (2) comprises a cold water tank (2-1), a water inlet pump (2-2), a cold water inlet pipe (2-3), a cold water regulating valve (2-4), a drainage pump (2-5) and a cold water discharge pipe (2-6); The output end of the cold water tank (2-1) is connected to the input end of the water inlet pump (2-2) through the cold water inlet pipe (2-3), the output end of the water inlet pump (2-2) is connected to one end of the cold water regulating valve (2-4) through the cold water inlet pipe (2-3), the other end of the cold water regulating valve (2-4) is connected to the detachable working medium discharge unit (6) corresponding to the lower layer inside the closed condenser (4), the cold water discharge end at the bottom of the closed condenser (4) is connected to the input end of the drainage pump (2-5) through the cold water discharge pipe (2-6), and the output end of the drainage pump (2-5) is connected to the return water end at the bottom of the cold water tank (2-1) through the cold water discharge pipe (2-6).

4. A visual analysis and testing system for working medium emission characteristics in a closed condenser according to claim 3, characterized in that: The steam-liquid jet mixing condensation boosting heating unit (3) comprises a steam valve (3-1), a cold water valve (3-2) and a steam-liquid jet mixing device (3-3); The connection between the output end of the electric heating boiler (1-1) and the input end of the steam regulating valve (1-2) is connected to one end of the steam valve (3-1) through a pipeline, and the other end of the steam valve (3-1) is connected to the steam input end of the steam-liquid jet mixing device (3-3) through a pipeline. The connection between the output end of the water inlet pump (2-2) and one end of the cold water regulating valve (2-4) is connected to one end of the cold water valve (3-2) through a pipeline, and the other end of the cold water valve (3-2) is connected to the cold water input end of the steam-liquid jet mixing device (3-3) through a pipeline. The output end of the steam-liquid jet mixing device (3-3) is connected to a detachable working medium discharge unit (6) corresponding to the middle layer inside the closed condenser (4) through a pipeline.

5. A visual analysis and testing system for working medium emission characteristics in a closed condenser according to claim 4, characterized in that: The circulating cooling unit (5) comprises a cooling tower (5-1), a circulating water pump (5-2), a circulating water regulating valve (5-3) and a circulating water pipeline (5-4); The circulation output end at the bottom of the closed condenser (4) is connected to the input end of the cooling tower (5-1) through a circulation water pipeline (5-4), the output end of the cooling tower (5-1) is connected to the input end of the circulation water pump (5-2) through the circulation water pipeline (5-4), the output end of the circulation water pump (5-2) is connected to one end of the circulation water regulating valve (5-3) through the circulation water pipeline (5-4), and the other end of the circulation water regulating valve (5-3) is connected to the circulation input end at the bottom of the closed condenser (4).

6. The visual analysis and testing system for the emission characteristics of working fluid in a closed condenser according to claim 1, characterized in that: The detachable working medium discharge unit (6) comprises an input connection flange (A), a fixed flange (B) and a baffle (C); One end of the fixed flange (B) is fixedly connected to the inside of the closed condenser (4), and the other end of the fixed flange (B) is detachably connected to the baffle (C). One end of the pipe passes through the center hole of the fixed flange (B) and is connected to the center hole of the baffle (C). The other end of the pipe passes through the shell of the closed condenser (4) and is connected to one end of the input connection flange (A).

7. The visual analysis and testing system for working medium emission characteristics in a closed condenser according to claim 1, characterized in that: The outer surface of the closed condenser (4) is evenly provided with three sensor signal line guide channels (7) along the circumferential direction, and a miniature underwater camera is respectively provided in the upper layer, middle layer and lower layer inside the closed condenser (4).

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