Performance detection system and detection method for nuclear power plant filter

Abstract

The present invention relates to a performance detection system for a nuclear power plant filter and a detection method thereof. A low-concentration liquid dispensing system is arranged at the front end of the performance detection system for the nuclear power plant filter; a high-concentration liquid dispensing system and the low-concentration liquid dispensing system are arranged in parallel; the outlets of the low-concentration liquid dispensing system and the high-concentration liquid dispensing system are both connected to a mixed dispensing system; the outlet of the mixed dispensing system is connected to the inlet of a test filtration system; standard particles configured in the low-concentration liquid dispensing system and the high-concentration liquid dispensing system are injected into the test filtration system, and the test filtration system uses the standard particles to detect the filter to be tested; a heating and cooling system is connected to the test filtration system to heat or cool the test filtration system; and a method for testing the filter's performance, such as filtration efficiency, interception capacity, filtration flow rate, filtration pressure difference, breaking pressure, and circulation resistance, is provided.

Description

Technical Field

[0001] The embodiments of the present invention relate to a filter performance detection system and a detection method thereof, and in particular to a performance detection system and a detection method thereof for a nuclear power plant filter. Background Art

[0002] Currently, nuclear power has seen significant development and application as a pollution-free power generation system. Numerous filters are used in nuclear power plants. However, since nuclear power plants generate radiation during operation, the selection of filter materials is subject to specific considerations, as well as the specific application location. Filters must be tested prior to installation. To ensure filter performance, the final product must undergo performance testing, including tests for filtration efficiency, retention capacity, filtration flow rate, filtration differential pressure, breakdown pressure, and circulation resistance. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a performance detection system for nuclear power plant filters, which can solve the problems of testing performance such as filtration efficiency, retention capacity, filtration flow rate, filtration pressure difference, breaking pressure and circulation resistance.

[0004] In order to achieve the above objectives, the embodiment of the present invention provides a performance detection system for a nuclear power plant filter, which is characterized by comprising:

[0005] A low-concentration liquid dispensing system is provided at the front end of a performance testing system for filters in nuclear power plants;

[0006] High concentration liquid dispensing system, the high concentration liquid dispensing system and the low concentration liquid dispensing system are set in parallel;

[0007] A mixing configuration system, wherein the outlet of the low-concentration liquid configuration system and the outlet of the high-concentration liquid configuration system are both connected to the mixing configuration system;

[0008] The test filtration system is configured such that the outlet of the mixed configuration system is connected to the inlet of the test filtration system; the standard particles configured in the low-concentration liquid configuration system and the high-concentration liquid configuration system are injected into the test filtration system, and the test filtration system uses the standard particles to detect the filter to be tested;

[0009] Heating and cooling system: connect the heating and cooling system to the test filtration system to heat or cool the test filtration system.

[0010] Furthermore, the low-concentration liquid preparation system further includes:

[0011] A first liquid dispensing tank is connected to the outlet of the second water inlet valve above the first liquid dispensing tank; the inlet of the second water inlet valve is connected to the deionized water inlet; the deionized water inlet is further connected to the inlet of the first water inlet valve and the inlet of the third water inlet valve; the outlet of the first water inlet valve is connected to the second liquid dispensing tank in the high-concentration liquid dispensing system; the outlet of the third water inlet valve is connected to the test tank in the mixed dispensing system; a water outlet valve is provided at the outlet of the third water inlet valve; and a first filter is provided between the inlet of the water outlet valve and the outlet of the third water inlet valve;

[0012] The inlet of the third liquid dispensing valve is connected to the first liquid dispensing tank, the outlet of the third liquid dispensing valve is connected to the inlet of the second liquid dispensing pump, the outlet of the second liquid dispensing pump is connected to the inlet of the first test valve; the outlet of the first test valve is connected to the inlet of the first flow meter, and the outlet of the first flow meter is connected to the test tank in the mixing configuration system;

[0013] The outlet of the first liquid level gauge is connected to one side of the first liquid dispensing tank; the inlet of the first liquid level gauge and the outlet of the first liquid dispensing tank are both connected to the inlet of the first liquid dispensing pump; the first liquid dispensing valve is connected to one side of the pipeline between the outlet of the first liquid dispensing tank and the first liquid dispensing pump; the outlet of the first liquid dispensing pump is connected to the inlet of the second liquid dispensing valve and the inlet of the fourth liquid dispensing valve respectively; the two ends of the second liquid dispensing valve are connected to the inlet of the second filter and the inlet of the fourth liquid dispensing valve respectively;

[0014] A first thermometer is connected to the pipeline from the outlet of the second filter to the second liquid distribution pump; at the same time, the outlet of the fourth liquid distribution valve is connected to the inlet of the second liquid distribution pump and the inlet of the first sampling valve respectively;

[0015] The outlet of the second liquid distribution pump is connected to the inlet of the first test valve; the outlet of the first test valve is connected to the test tank in the mixing configuration system.

[0016] Furthermore, the high concentration liquid preparation system further includes:

[0017] Connect the outlet of the first water inlet valve to the second liquid dispensing tank; and add deionized water to the second liquid dispensing tank;

[0018] The inlet of the fifth liquid dispensing valve is connected to the second liquid dispensing tank, the outlet of the fifth liquid dispensing valve is connected to the inlet of the third liquid dispensing pump, the outlet of the third liquid dispensing pump is connected to the inlet of the second test valve; the outlet of the second test valve is connected to the inlet of the second flow meter, and the outlet of the second flow meter is connected to the test tank in the mixing configuration system;

[0019] The outlet of the second liquid level gauge is connected to one side of the second liquid dispensing tank; the inlet of the second liquid level gauge and the outlet of the second liquid dispensing tank are both connected to the inlet of the fourth liquid dispensing pump, and a sixth liquid dispensing valve is connected to one side of the pipeline between the outlet of the second liquid dispensing tank and the fourth liquid dispensing pump;

[0020] The two ends of the seventh liquid dispensing valve are respectively connected to the inlet of the third filter and the inlet of the eighth liquid dispensing valve; a second thermometer is connected to the pipeline from the outlet of the third filter to the third liquid dispensing pump; at the same time, the outlet of the eighth liquid dispensing valve is respectively connected to the inlet of the third liquid dispensing pump and the inlet of the second sampling valve;

[0021] The outlet of the third liquid distribution pump is connected to the inlet of the second test valve; the outlet of the second test valve is connected to the test tank in the mixing configuration system.

[0022] Furthermore, the hybrid configuration system further includes:

[0023] A third liquid level gauge is provided on one side of the test tank in the mixing configuration system. The third liquid level gauge is connected to the inlet of the test pump, and the inlet of the test pump is also connected to the outlet of the test tank; a ninth liquid dispensing valve is provided at the outlet of the test tank;

[0024] The test tank in the hybrid configuration system is connected to the inlets of the third test valve and the fourth test valve respectively, the outlet of the third test valve is connected to the inlet of the fifth test valve, the inlet of the third test valve is connected to a drain valve, the outlet of the fifth test valve is connected to the inlet of the third flow meter, and the third flow meter is connected to the outlet of the heat exchanger of the heating and cooling system;

[0025] The test tank in the mixing configuration system is also connected to the inlet of the sixth test valve and the inlet of the seventh test valve in the test filtration system; a third thermometer and a temperature sensor are arranged in series on the pipeline from the test tank to the inlet of the sixth test valve and the inlet of the seventh test valve, for measuring the temperature of the fluid of the standard particulate matter.

[0026] Furthermore, the test filtration system further comprises:

[0027] The outlet of the seventh test valve is connected to the inlet of the fourth filter; the outlet of the fourth filter is connected in parallel with the outlet of the sixth test valve and then connected to the inlet of the test filter; the first pressure sensor, the first pressure gauge and the third sampling valve are arranged in series on the pipeline from the outlet of the sixth test valve to the inlet of the test filter; the differential pressure gauge and the online detector are respectively arranged in parallel at both ends of the test filter; the outlet of the test filter is connected to the inlet of the eighth test valve; the fourth sampling valve, the second pressure sensor and the second pressure gauge are respectively arranged in series on the pipeline from the outlet of the test filter to the inlet of the eighth test valve; the outlet of the eighth test valve is connected to the inlet of the heat exchanger of the heating and cooling system.

[0028] Furthermore, the heating and cooling system further comprises:

[0029] The steam inlet is connected to a pipeline on the heat source inlet side of the heat exchanger of the heating and cooling system, which is connected in series with a first regulating valve, a fifth filter, a second regulating valve, and a third regulating valve; the steam inlet is connected to a steam generator;

[0030] The cooling water inlet is connected to the pipeline on the heat source inlet side of the heat exchanger in the heating and cooling system, and the fourth regulating valve, the sixth filter, and the fifth regulating valve are connected in series in sequence; the cooling water inlet is connected to the pipeline on the heat source inlet side of the heat exchanger and the steam inlet is connected to the pipeline on the heat source inlet side of the heat exchanger inlet in parallel; the cooling water inlet is connected to the mold temperature controller;

[0031] The steam condensate return port is connected to the pipeline on the heat source outlet side of the heat exchanger of the heating and cooling system, which is connected in series with the sixth regulating valve, the seventh filter, and the seventh regulating valve in sequence. At the same time, the pipeline from the steam condensate return port to the heat source outlet side of the heat exchanger is connected in parallel to both ends of the eighth regulating valve;

[0032] The cooling water outlet is connected to the pipeline on the heat source outlet side of the heat exchanger of the heating and cooling system, and the two ends of the ninth regulating valve are connected in parallel; the cooling water outlet is connected to the mold temperature controller.

[0033] Furthermore, a first agitator is provided inside the first liquid mixing tank; a second agitator is provided inside the second liquid mixing tank; and a third agitator is provided inside the test tank for stirring the first liquid mixing tank, the second liquid mixing tank and the test tank.

[0034] The embodiment of the present invention also designs a detection method for a performance detection system of a nuclear power plant filter, including: testing the performance of the test filter in terms of filtration efficiency, retention capacity, flow rate and pressure difference, destruction pressure, and circulation resistance according to a detection method for filtration efficiency, a detection method for retention capacity, a detection method for filtration flow rate and pressure difference, a detection method for destruction pressure, and a detection method for circulation resistance.

[0035] Furthermore, the method for detecting the filtration efficiency and the method for detecting the retention capacity include the following steps:

[0036] Step S10: Circulating self-cleaning of the low-concentration liquid preparation system;

[0037] Open the second water inlet valve to introduce deionized water into the first liquid dispensing tank, and measure the deionized water to a preset liquid level value using the first liquid level gauge; if the temperature of the deionized water is lower than or higher than 21°C-25°C; use steam or cooling water to maintain the water temperature in the liquid dispensing tank at 21°C-25°C, and display the water temperature on the first thermometer; open the second and third liquid dispensing valves, start the first liquid dispensing pump, and allow the deionized water to pass through the second liquid dispensing filter and return to the first liquid dispensing tank, and circulate and self-purify in the low-concentration liquid dispensing system; open the first sampling valve to take samples for testing; when the number of particles larger than 2μm in every 100ml of deionized water is less than 6000, step S10-low-concentration liquid dispensing system circulation and self-purification is completed; and proceed to step S11;

[0038] Step S11: preparing low-concentration particulate matter;

[0039] Open the fourth and third dispensing valves; close the second dispensing valve, circulate the low-concentration dispensing system, add particulate matter to the first dispensing tank at a ratio of 5 mg / L, and simultaneously start the first agitator. Ensure that the circulation lasts for 10 minutes so that the concentration of the low-concentration particulate matter solution in the low-concentration dispensing system reaches a uniform concentration; then proceed to step S15;

[0040] Step S13: Circulating self-cleaning of the high-concentration liquid preparation system;

[0041] Open the first water inlet valve 1 to introduce deionized water into the second liquid dispensing tank, and measure the deionized water to a preset liquid level value using the second liquid level gauge; if the temperature of the deionized water is lower than or higher than 21°C-25°C; use steam or cooling water to maintain the water temperature in the second liquid dispensing tank at 21°C-25°C, and display the water temperature on the second thermometer; open the seventh liquid dispensing valve and the fifth liquid dispensing valve, start the fourth liquid dispensing pump, and allow the deionized water to pass through the third filter and return to the second liquid dispensing tank, and circulate and self-purify in the high-concentration liquid dispensing system; open the second sampling valve to take samples for testing; when the number of particles larger than 2 μm in every 100 ml of deionized water is less than 6,000; step S13: the high-concentration liquid dispensing system circulation and self-purification are completed; and then proceed to step S14;

[0042] Step S14: preparing high-concentration particulate matter;

[0043] Open the eighth and fifth dispensing valves, close the seventh dispensing valve, and circulate the high-concentration dispensing system. Add particulate matter to the second dispensing tank at a ratio of 100 mg / L. Simultaneously, start the second agitator and circulate for 10 minutes until the concentration of the high-concentration particulate matter solution in the high-concentration dispensing system reaches a uniform concentration. Then proceed to step S16.

[0044] Filtration efficiency testing includes deep filter element testing and surface filter element testing of the same filter element; it also includes the following steps:

[0045] Step S15: deep filter element testing of the same filter element;

[0046] Open the first liquid dispensing valve, the fourth liquid dispensing valve and the first test valve; start the first liquid dispensing pump and the second liquid dispensing pump, and at the same time close the third liquid dispensing valve, so that the low-concentration particulate matter solution enters the test tank, and start the third agitator to make the low-concentration particulate matter solution uniform, and display the flow rate through the first flow meter. When the liquid level of the first liquid dispensing tank is lower than the preset liquid level setting value, the first liquid dispensing pump stops running, and then the second liquid dispensing pump also stops running. When the third liquid level gauge on the test tank reaches the set liquid level, the test pump starts, and the low-concentration particulate matter solution passes through the opened ninth test valve, the sixth test valve and the test filter with the deep filter element installed in sequence; and The liquid returns to the test tank through the opened eighth test valve, the fifth test valve, and the third test valve; the solution before filtration is collected at the third sampling valve, and the solution after filtration is collected at the fourth sampling valve for testing. The third thermometer displays the solution temperature, the differential pressure gauge displays the pressure difference of the test filter before and after filtration, the first pressure gauge displays the pressure before filtration, and the second pressure gauge displays the pressure after filtration. Steam passes through the eighth regulating valve and the fifth regulating valve, or cooling water passes through the fourth regulating valve, so that the water temperature in the test tank is maintained at 21°C-25°C. When the pressure difference of the depth filter element reaches 150KPa, the depth filter element testing of the same filter element is completed; and the process proceeds to step S17;

[0047] Step S16: Surface filter element detection of the same filter element;

[0048] Open the sixth liquid dispensing valve, the eighth liquid dispensing valve, and the second test valve; start the fourth liquid dispensing pump and the third liquid dispensing pump, and at the same time close the fifth liquid dispensing valve, so that the high-concentration particulate matter solution enters the test tank, and start the third agitator to make the high-concentration particulate matter solution uniform. The flow rate is displayed by the second flow meter. When the liquid level of the second liquid dispensing tank is lower than the preset liquid level value, the fourth liquid dispensing valve stops running, and then the third liquid dispensing pump also stops running. When the third liquid level gauge on the test tank reaches the preset liquid level value, the test pump starts, and the high-concentration particulate matter solution passes through the opened ninth test valve, the sixth test valve, and the test filter with the deep filter element installed in sequence; and through the opened eighth test valve , the fifth test valve, and the third test valve return to the test tank, the solution before filtration is collected at the third sampling valve, and the solution after filtration is collected at the fourth sampling valve for testing. The third thermometer displays the solution temperature, and the differential pressure gauge displays the pressure difference of the test filter before and after filtration. The first pressure gauge displays the pressure before filtration, and the second pressure gauge displays the pressure after filtration. Steam passes through the eighth regulating valve and the fifth regulating valve, or cooling water passes through the fourth regulating valve, so that the water temperature in the test tank is maintained at 21°C-25°C. When the pressure difference of the deep filter element reaches 150KPa, and when the pressure difference of the surface filter element reaches 250KPa, the surface filter element test of the same filter element is completed, and the process proceeds to step S17;

[0049] Step S17: interception capacity detection;

[0050] When the pressure difference of the test filter equipped with a depth filter element reaches 150 kPa; when the pressure difference of the surface filter element of the test filter equipped with a depth filter element reaches 250 kPa, the retention capacity test can be performed. The entire test solution is collected at the drain valve at the lowest point of the performance test system for the nuclear power plant filter, and the weight is compared with the initial weight to obtain the retention capacity; then the process proceeds to step S18;

[0051] Step S18: Cleaning the low-concentration liquid preparation system;

[0052] Open the second water inlet valve to introduce deionized water into the first liquid dispensing tank, and measure the deionized water to a preset liquid level value using the first liquid level gauge; use the first thermometer to display the water temperature, and sequentially open the first liquid dispensing valve, the second liquid dispensing valve, and the third liquid dispensing valve; start the first liquid dispensing pump to allow the deionized water to pass through the second filter and return to the first liquid dispensing tank, where it is circulated and cleaned in the low-concentration liquid dispensing system; until the first sampling valve is opened for sampling and testing, when the number of particles larger than 2 μm in every 100 ml of deionized water is less than 6,000, stop cleaning the low-concentration liquid dispensing system and proceed to step S19;

[0053] Step S19: Cleaning the high-concentration liquid preparation system

[0054] Open the first water inlet valve 1 to introduce deionized water into the second liquid dispensing tank. The deionized water is measured to a preset level using the second liquid level gauge. The water temperature is displayed on the second thermometer. The sixth, seventh, and fifth liquid dispensing valves are sequentially opened, and the fourth liquid dispensing pump is activated, allowing the deionized water to flow through the third filter and return to the second liquid dispensing tank. The deionized water is then circulated and cleaned in the high-concentration liquid dispensing system until the second sampling valve is opened for sampling and testing. When the number of particles larger than 2 μm per 100 ml of deionized water is less than 6,000, cleaning of the high-concentration liquid dispensing system is terminated, and the process proceeds to step S20.

[0055] Step S20: cleaning the test system;

[0056] First, remove the test filter element from the test filter, open the third water inlet valve, and introduce deionized water into the test tank. When the third liquid level gauge on the test tank reaches a preset liquid level, the test pump is started, and the deionized water passes through the opened ninth test valve, the opened seventh test valve, the fourth filter, the opened eighth test valve, and the opened fourth test valve, and returns to the test tank, circulating and cleaning the test system until the drain valve is opened for sampling and testing. When the number of particles larger than 2 μm in every 100 ml of deionized water is less than 6,000, the cleaning test system stops and enters step S21.

[0057] Step S21: emptying the test system;

[0058] Close the performance detection system for the nuclear power plant filter, and open the drain valve at the lowest point of the performance detection system for the nuclear power plant filter to drain the solution of the performance detection system for the nuclear power plant filter.

[0059] Furthermore, the method for detecting the filtration flow rate and the pressure difference includes the following steps:

[0060] Step S31: The low-concentration liquid preparation system circulation self-purification method is the same as step S10, and after completion, proceed to step S34;

[0061] Step S32: Circulating self-cleaning of the high-concentration liquid preparation system is the same as step S13, and after completion, proceed to step S34;

[0062] Step S34: Test system detection

[0063] Open the sixth liquid dispensing valve, the eighth liquid dispensing valve, and the second test valve; start the fourth liquid dispensing pump and the third liquid dispensing pump, and at the same time close the fifth liquid dispensing valve, so that the solution after self-purification in step S31 and step S32 enters the test tank, and the flow rate is displayed by the second flow meter. When the liquid level of the second liquid dispensing tank is lower than the preset value, the fourth liquid dispensing pump stops running. After the fourth liquid dispensing pump stops, the third liquid dispensing pump also stops running. When the third liquid level gauge on the test tank reaches the preset liquid level, the test pump starts, and the solution passes through the opened ninth test valve and the sixth test valve, and the test filter without the filter element installed in turn; the opened eighth test valve, the fifth The test valve and the third test valve return to the test tank; the temperature of the solution is displayed by the third thermometer; the differential pressure gauge displays the pressure difference of the test filter before and after filtration, the first pressure gauge displays the pressure of the test filter before filtration, and the second pressure gauge displays the pressure of the test filter after filtration. Steam passes through the eighth regulating valve or the fifth regulating valve and the fourth regulating valve. Heating water or cooling water is used to maintain the water temperature in the test tank between 21°C and 25°C. The eighth test valve and the sixth test valve are adjusted so that the flow rate through the test filter housing is 1.2 times the standard flow rate of the filter element. The flow rate of the solution is observed by the second flow meter and the flow rate data is recorded; and step S35 is entered;

[0064] Step S35: adjusting the flow rate;

[0065] When the circulation flow rate reaches stability, adjust the eighth test valve and the sixth test valve so that the flow rate through the test filter housing is 0.2 to 1.2 times the set flow rate of the filter element, with the flow rate increase being 0.2 times each time. Observe the flow rate through the second flow meter and simultaneously observe and record the corresponding pressure difference displayed by the differential pressure gauge; record the first pressure difference data;

[0066] After the test filter housing is inspected, the test pump is stopped. After the filter element to be tested is installed in the test filter, the test pump is restarted. The eighth test valve and the sixth test valve are adjusted so that the flow rate through the test filter is 0.2 to 1.2 times the set flow rate of the filter element, with the flow rate increased by 0.2 times each time. The flow rate is observed using a second flow meter, and the corresponding pressure difference displayed by the differential pressure gauge is observed and recorded. The second pressure difference data is recorded, and the process proceeds to step S36.

[0067] Step S36: Calculate the pressure drop generated by the test filter element in the test filter. The measured value is obtained by subtracting the first pressure difference data from the second pressure difference data in step S35. The measured value is the pressure drop value of the filter housing and the filter element together; then proceed to step S37;

[0068] Step S37: emptying the test system;

[0069] Close the performance testing system for the nuclear power plant filter, take out the test filter element first, and then open the drain valve at the lowest point of the performance testing system for the nuclear power plant filter to drain the solution of the performance testing system for the nuclear power plant filter.

[0070] Furthermore, the method for detecting the failure pressure includes the following steps:

[0071] Step S41: The low-concentration liquid preparation system circulation self-cleaning method is the same as step S10, and after completion, proceed to step S42;

[0072] Step S42: The method for preparing low-concentration particulate matter circulated by the low-concentration liquid preparation system is the same as step S11;

[0073] Step S43: The high-concentration liquid preparation system circulation self-cleaning method is the same as step S13, and after completion, proceed to step S44;

[0074] Step S44: The method for preparing high-concentration particulate matter in the high-concentration liquid preparation system is the same as step S14; after completion, proceed to step S45;

[0075] Step S45: Destruction pressure detection;

[0076] Open the sixth and eighth dispensing valves and the test valve; start the fourth and third dispensing pumps, and at the same time close the fifth dispensing valve, so that the high-concentration particulate matter solution in step S44 enters the test tank, and the flow rate is displayed by the second flow meter; when the liquid level in the second dispensing tank is lower than the preset value, the fourth dispensing pump stops running, and after the fourth dispensing pump stops, the third dispensing pump also stops running. When the third liquid level gauge on the test tank reaches the set liquid level, the test pump starts, and the high-concentration particulate matter solution passes through the opened ninth and sixth test valves in sequence; the test filter with the filter element installed, the opened eighth The test valve, the fifth test valve, and the third test valve are returned to the test tank. The temperature of the high-concentration particulate matter solution is displayed by the third thermometer. The pressure difference between the test filter and the filter is displayed by the differential pressure gauge. The pressure before filtration is displayed by the first pressure gauge. The pressure after filtration is displayed by the second pressure gauge. Steam passes through the eighth regulating valve or the fifth regulating valve and the fourth regulating valve. Heating water or cooling water is used to maintain the water temperature in the test tank between 21°C and 25°C. The eighth test valve and the sixth test valve are adjusted so that the flow rate through the test filter housing reaches the set flow rate. The pressure difference and flow rate through the test filter at this time are recorded.

[0077] If the pressure difference continues to increase steadily during the detection process, step S45 is repeated.

[0078] If the pressure difference decreases or remains constant for at least 3 minutes during the test, stop the test and note the point at which the pressure difference changes; proceed to step S46;

[0079] Step S46: Cleaning the high-concentration liquid preparation system is the same as step S19; proceed to step S47;

[0080] Step S47: The test system cleaning method is the same as step S20; proceed to step S48;

[0081] Step S48: Empty the test system

[0082] Close the performance testing system for the nuclear power plant filter, take out the test filter element first, and then open the drain valve at the lowest point of the performance testing system for the nuclear power plant filter to drain the solution of the performance testing system for the nuclear power plant filter.

[0083] Furthermore, the method for detecting circulation resistance further includes the following steps:

[0084] Step S50: The high-concentration liquid preparation system circulation self-cleaning method is the same as step S13, and after completion, it proceeds to step S51;

[0085] Step S51: test system cycle;

[0086] Open the sixth liquid dispensing valve, the eighth liquid dispensing valve and the test valve; start the fourth liquid dispensing pump and the third liquid dispensing pump, and at the same time close the fifth liquid dispensing valve, so that the solution in step S50 enters the test tank, and the flow rate is displayed by the second flow meter; when the liquid level of the second liquid dispensing tank is lower than the preset value, the fourth liquid dispensing pump stops running, and after the fourth liquid dispensing pump stops, the third liquid dispensing pump also stops running. When the third liquid level gauge on the test tank reaches the set liquid level, the test pump starts, and the high-concentration particulate matter solution passes through the opened ninth test valve and the sixth test valve in sequence; the test filter with the filter element installed, the opened eighth test valve, the fifth test valve, the third test valve, The test valve returns to the test tank, the temperature of the high-concentration particulate matter solution is displayed by the third thermometer, the pressure difference of the test filter before and after filtration is displayed by the differential pressure gauge, the pressure before filtration is displayed by the first pressure gauge, and the pressure after filtration is displayed by the second pressure gauge. Steam passes through the eighth regulating valve or the fifth regulating valve and the fourth regulating valve. Heating water or cooling water is used to maintain the water temperature in the test tank between 21°C and 25°C. The eighth test valve and the sixth test valve are adjusted so that the flow rate through the test filter housing is 10L-20L / min. The flow rate is observed by the second flow meter, and the number of cycles is counted by the counter; then the process proceeds to step S52;

[0087] Step S52: Result judgment;

[0088] When the circulation flow rate reaches a stable state, the test pump is stopped, the filter element to be tested is loaded into the test filter, the test pump is started, and the eighth test valve and the sixth test valve are adjusted so that the pressure difference across the test filter reaches 200 kPa. The pressure difference across the test filter is recorded by a differential pressure gauge; then the process proceeds to step S53;

[0089] Step S53: record;

[0090] Record the pressure difference during the entire test period; detect the minimum and maximum pressures in the steady state; proceed to step S54;

[0091] Step S54: Empty the test system

[0092] Close the performance testing system for the nuclear power plant filter, take out the test filter element first, and then open the drain valve at the lowest point of the performance testing system for the nuclear power plant filter to drain the solution of the performance testing system for the nuclear power plant filter.

[0093] Compared with the prior art, the embodiments of the present invention are different. In the performance testing system for nuclear power plant filters, a low-concentration liquid preparation system, a high-concentration liquid preparation system, a mixed preparation system, a test system, a heating system, and other systems are designed. These systems can test the filter's filtration efficiency, retention capacity, filtration flow rate, filtration pressure difference, breaking pressure, and circulation resistance. The low-concentration liquid preparation system is mainly used to prepare particulate matter for testing the performance of depth filters; the high-concentration liquid preparation system is mainly used to prepare particulate matter for testing the performance of surface filters; and the test system is used to test the performance of depth filters or surface filters. The advantage of the present invention lies in establishing a performance testing system for nuclear power plant filters and providing corresponding testing methods, which can test the different performance of filters. BRIEF DESCRIPTION OF THE DRAWINGS

[0094] Figure 1 It is a structural schematic diagram of the present invention;

[0095] Figure 2 Schematic diagram of the flow chart of the method for detecting filtration efficiency and the method for detecting retention capacity of the present invention;

[0096] Figure 3 Schematic diagram of the flow chart of the method for detecting filtration flow rate and pressure difference of the present invention;

[0097] Figure 4 Schematic diagram of the process flow of the breaking pressure of the present invention;

[0098] Figure 5 Schematic diagram of the process flow of the circulation resistance of the present invention.

[0099] The reference numerals are as follows:

[0100] 1-first water inlet valve, 6-second water inlet valve, 8-third water inlet valve, 20-water outlet valve, 4-first liquid distribution valve, 9-second liquid distribution valve, 11-third liquid distribution valve, 14-fourth liquid distribution valve, 19-fifth liquid distribution valve, 62-ninth liquid distribution valve, 67-eighth liquid distribution valve, 68-seventh liquid distribution valve, 70-sixth liquid distribution valve, 16-first test valve, 22-second test valve, 28-third test valve, 29-fourth test valve, 30-fifth test valve, 32- Eighth test valve, 58-sixth test valve, 59 is the seventh test valve, 34-third regulating valve, 35-fifth regulating valve, 36-second regulating valve, 39-fourth regulating valve, 40-first regulating valve, 43-sixth regulating valve, 44-eighth regulating valve, 46-ninth regulating valve, 47-seventh regulating valve, 17-first sampling valve, 50-fourth sampling valve, 54-third sampling valve, 66 is the second sampling valve, 26-drain valve, 3-first liquid distribution tank, 69-first Second liquid dispensing tank, 25-test tank, 5-first agitator, 27-third agitator, 72-second agitator, 33-heat exchanger, 10-first filter, 12-second filter, 37-sixth filter, 38-fifth filter, 45-seventh filter, 57-fourth filter, 65-third filter, 52-test filter, 7-first liquid dispensing pump, 15-second liquid dispensing pump, 21-third liquid dispensing pump, 71-fourth liquid dispensing pump, 63-test pump, 18-first flowmeter, 23-second flowmeter, 31-third flowmeter, 13-first thermometer, 61-third thermometer, 64-second thermometer, 60-temperature sensor, 48-second pressure gauge, 55-first pressure gauge, 49-second pressure sensor, 56-first pressure sensor, 51-differential pressure gauge, 53-online detector, 2-first liquid level gauge, 24-third liquid level gauge, 73-second liquid level gauge, 41-mold temperature controller, 42-steam generator DETAILED DESCRIPTION

[0101] To make the objectives, technical solutions, and advantages of the present invention more apparent, various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will appreciate that many technical details are provided in various embodiments of the present invention to facilitate a better understanding of the present application. However, even without these technical details and the various variations and modifications based on the following embodiments, the technical solutions claimed in the claims of this application can be implemented.

[0102] The first embodiment of the present invention relates to a performance detection system for a filter in a nuclear power plant, such as Figure 1 Shown, including:

[0103] A low-concentration liquid preparation system 100 is provided at the front end of a performance testing system for a nuclear power plant filter; the low-concentration liquid preparation system 100 is used to prepare a low-concentration particulate matter solution.

[0104] The high-concentration liquid preparation system 200 is set in parallel with the low-concentration liquid preparation system 100; the high-concentration liquid preparation system 200 is mainly used to prepare a solution with high concentration of particulate matter; and provides a solution with a standard particulate matter concentration for the performance detection system of the filter in this embodiment.

[0105] The outlet of the low-concentration liquid preparation system 100 and the outlet of the high-concentration liquid preparation system 200 are both connected to the mixing preparation system 300; the function of the mixing preparation system 300 is mainly to uniformly mix the standard concentration solutions produced by the low-concentration liquid preparation system 100 or the high-concentration liquid preparation system 200.

[0106] The outlet of the mixing configuration system 300 is connected to the inlet of the test filtration system 400; the standard particulate matter configured in the low-concentration liquid configuration system 100 and the high-concentration liquid configuration system 200 is injected into the test filtration system 400, and the test filtration system 400 uses the standard particulate matter to detect the filter to be tested; the function of the test filtration system 400 is mainly to test the filter to be tested, mainly for testing the filter efficiency, retention capacity, filtration flow rate, filtration pressure difference, breaking pressure and circulation resistance and other performance of the filter.

[0107] The heating and cooling system 500 is connected to the test filtration system 400 to heat or cool the test filtration system 400; the heating and cooling system 500 heats the solution in the test filtration system 400 to reach a standard temperature.

[0108] The present invention's performance testing system for nuclear power plant filters includes a low-concentration liquid preparation system, a high-concentration liquid preparation system, a mixed preparation system, a test filtration system, and a heating and cooling system. These systems can test filter performance, including filtration efficiency, retention capacity, filtration flow rate, filtration pressure differential, breakdown pressure, and circulation resistance. The low-concentration liquid preparation system is primarily used to prepare particulate matter for testing the performance of depth filters; the high-concentration liquid preparation system is primarily used to prepare particulate matter for testing the performance of surface filters; and the test system is used to test the performance of depth or surface filters. The present invention provides a performance testing system for nuclear power plant filters and corresponding testing methods, enabling testing of various filter properties.

[0109] In order to achieve the above technical performance, such as Figure 1 As shown, the low-concentration liquid preparation system 100 further includes:

[0110] The first liquid dispensing tank 3 is connected to the outlet of the second water inlet valve 6 above the first liquid dispensing tank 3; the inlet of the second water inlet valve 6 is connected to the deionized water inlet; the deionized water inlet is also connected to the inlet of the first water inlet valve 1 and the inlet of the third water inlet valve 8; the outlet of the first water inlet valve 1 is connected to the second liquid dispensing tank 69 in the high-concentration liquid dispensing system; the outlet of the third water inlet valve 8 is connected to the test tank 25 in the mixing and dispensing system 300; a water outlet valve 20 is provided at the outlet of the third water inlet valve 8; and a first filter 10 is provided between the inlet of the water outlet valve 20 and the outlet of the third water inlet valve 8;

[0111] The inlet of the third liquid dispensing valve 11 is connected to the first liquid dispensing tank 3, the outlet of the third liquid dispensing valve 11 is connected to the inlet of the second liquid dispensing pump 15, the outlet of the second liquid dispensing pump 15 is connected to the inlet of the first test valve 16; the outlet of the first test valve 16 is connected to the inlet of the first flow meter 18, and the outlet of the first flow meter 18 is connected to the test tank 25 in the mixing configuration system;

[0112] The outlet of the first liquid level gauge 2 is connected to one side of the first liquid dispensing tank 3; the inlet of the first liquid level gauge 2 and the outlet of the first liquid dispensing tank 3 are both connected to the inlet of the first liquid dispensing pump 7; the first liquid dispensing valve 4 is connected to one side of the pipeline between the outlet of the first liquid dispensing tank 3 and the first liquid dispensing pump 7; the outlet of the first liquid dispensing pump 7 is connected to the inlet of the second liquid dispensing valve 9 and the inlet of the fourth liquid dispensing valve 14 respectively; the two ends of the second liquid dispensing valve 9 are connected to the inlet of the second filter 12 and the inlet of the fourth liquid dispensing valve 14 respectively;

[0113] A first thermometer 13 is connected to the pipeline from the outlet of the second filter 12 to the second liquid distribution pump 15; at the same time, the outlet of the fourth liquid distribution valve 14 is connected to the inlet of the second liquid distribution pump 15 and the inlet of the first sampling valve 17 respectively;

[0114] The outlet of the second liquid distribution pump 15 is connected to the inlet of the first test valve 16 ; the outlet of the first test valve 16 is connected to the test tank 25 in the mixing configuration system 300 .

[0115] The connection relationship of the components described above constitutes the low-concentration liquid dispensing function of the low-concentration liquid dispensing system 100 for dispensing low-concentration particulate matter.

[0116] In order to achieve the above technical performance, such as Figure 1 As shown, the high concentration liquid preparation system 200 further includes:

[0117] Connect the outlet of the first water inlet valve 1 to the second liquid distribution tank 69 to allow deionized water to enter the second liquid distribution tank 69;

[0118] The inlet of the fifth liquid dispensing valve 19 is connected to the second liquid dispensing tank 69, the outlet of the fifth liquid dispensing valve 19 is connected to the inlet of the third liquid dispensing pump 21, the outlet of the third liquid dispensing pump 21 is connected to the inlet of the second test valve 22; the outlet of the second test valve 22 is connected to the inlet of the second flow meter 23, and the outlet of the second flow meter 23 is connected to the test tank 25 in the mixing configuration system;

[0119] The outlet of the second liquid level gauge 73 is connected to one side of the second liquid distribution tank 69; the inlet of the second liquid level gauge 73 and the outlet of the second liquid distribution tank 69 are both connected to the inlet of the fourth liquid distribution pump 71, and a sixth liquid distribution valve 70 is connected to one side of the pipeline between the outlet of the second liquid distribution tank 69 and the fourth liquid distribution pump 71;

[0120] The two ends of the seventh liquid distribution valve 68 are connected to the inlet of the third filter 65 and the inlet of the eighth liquid distribution valve 67 respectively. The second thermometer 64 is connected to the pipeline from the outlet of the third filter 65 to the third liquid distribution pump 21. At the same time, the outlet of the eighth liquid distribution valve 67 is connected to the inlet of the third liquid distribution pump 21 and the inlet of the second sampling valve 66 respectively.

[0121] The outlet of the third liquid distribution pump 21 is connected to the inlet of the second test valve 22 ; the outlet of the second test valve 22 is connected to the test tank 25 in the mixing configuration system 300 .

[0122] The connection relationship of the components described above constitutes the high-concentration liquid preparation function of the high-concentration liquid preparation system 200 for preparing high-concentration particulate matter.

[0123] In order to achieve the above technical performance, such as Figure 1 As shown, the hybrid configuration system 300 further includes:

[0124] A third liquid level gauge 24 is provided on one side of the test tank 25 in the mixing configuration system 300. The third liquid level gauge 24 is connected to the inlet of the test pump 63, which is also connected to the outlet of the test tank 25. A ninth liquid dispensing valve 62 is provided at the outlet of the test tank 25.

[0125] The test tank 25 in the hybrid configuration system 300 is connected to the inlets of the third test valve 28 and the fourth test valve 29 respectively. The outlet of the third test valve 28 is connected to the inlet of the fifth test valve 30. The inlet of the third test valve 28 is connected to the drain valve 26. The outlet of the fifth test valve 30 is connected to the inlet of the third flow meter 31. The third flow meter 31 is connected to the outlet of the heat exchanger 33 of the heating and cooling system 500.

[0126] The test tank 25 in the mixing configuration system 300 is also connected to the inlet of the sixth test valve 58 and the inlet of the seventh test valve 59 in the test filtration system 400; a third thermometer 61 and a temperature sensor 60 are arranged in series on the pipeline from the test tank 25 to the inlet of the sixth test valve 58 and the inlet of the seventh test valve 59, for measuring the temperature of the fluid of the standard particulate matter.

[0127] The mixing and preparing system 300 mixes the high-concentration particulate solution of the high-concentration liquid preparing system 200 or the measurement standard particulate matter of the high-concentration particulate solution of the high-concentration liquid preparing system 200 uniformly.

[0128] In order to achieve the above technical performance, such as Figure 1 As shown, the test filtration system 400 further includes:

[0129] The outlet of the seventh test valve 59 is connected to the inlet of the fourth filter 57; the outlet of the fourth filter 57 is connected in parallel with the outlet of the sixth test valve 58 and then connected to the inlet of the test filter 52; the first pressure sensor 5, the first pressure gauge 55 and the third sampling valve 54 are arranged in series on the pipeline from the outlet of the sixth test valve 58 to the inlet of the test filter 52; the differential pressure gauge 51 and the online detector 53 are respectively arranged in parallel at both ends of the test filter 52; the outlet of the test filter 52 is connected to the inlet of the eighth test valve; the fourth sampling valve 50, the second pressure sensor 49 and the second pressure gauge 48 are respectively arranged in series on the pipeline from the outlet of the test filter 52 to the inlet of the eighth test valve; the outlet of the eighth test valve 32 is connected to the inlet of the heat exchanger 33 of the heating and cooling system 500.

[0130] The test filtration system 400 is mainly used to perform performance tests on the filter to be tested, such as filtration efficiency, retention capacity, filtration flow rate, filtration pressure difference, destruction pressure and circulation resistance. It mainly uses circulation operation to read pressure difference, pressure and other data, and perform data calculations to calculate data such as filtration efficiency, retention capacity, filtration flow rate, filtration pressure difference, destruction pressure and circulation resistance.

[0131] In order to achieve the above technical performance, such as Figure 1 As shown, the heating and cooling system 500 further includes:

[0132] The steam inlet is connected to the pipeline on the heat source inlet side of the heat exchanger 33 of the heating and cooling system 500, which is connected in series with the first regulating valve 40, the fifth filter 38, the second regulating valve 36, and the third regulating valve 34; the steam inlet is connected to the steam generator 42;

[0133] The cooling water inlet is connected to the pipeline on the heat source inlet side of the heat exchanger 33 of the heating and cooling system 500, and the fourth regulating valve 39, the sixth filter 37, and the fifth regulating valve 35 are connected in series in sequence. The cooling water inlet is connected to the pipeline on the heat source inlet side of the heat exchanger 33 and the steam inlet is connected to the pipeline on the heat source inlet side of the heat exchanger 33 in parallel. The cooling water inlet is connected to the mold temperature controller 41.

[0134] The steam condensate return port is connected to the pipeline on the heat source outlet side of the heat exchanger 33 of the heating and cooling system 500, which is connected in series with the sixth regulating valve 43, the seventh filter 45, and the seventh regulating valve 47. At the same time, the pipeline from the steam condensate return port to the heat source outlet side of the heat exchanger 33 is connected in parallel to both ends of the eighth regulating valve 44.

[0135] The cooling water outlet is connected to both ends of the ninth regulating valve 46 in parallel on the pipeline on the heat source outlet side of the heat exchanger 33 of the heating and cooling system 500 ; the cooling water outlet is connected to the mold temperature controller 41 .

[0136] The above-mentioned heating and cooling system 500 mainly utilizes steam and a mold temperature controller to heat or cool, mainly to achieve the standard temperature.

[0137] At the same time, in order to speed up the configuration and uniform mixing of the solution, Figure 1 As shown, a first agitator 5 is provided inside the first liquid dispensing tank 3 ; a second agitator 72 is provided inside the second liquid dispensing tank 69 and a third agitator 27 is provided inside the test tank 25 for stirring the first liquid dispensing tank 3 , the second liquid dispensing tank 69 and the test tank 25 .

[0138] A second embodiment of the present invention also discloses a testing method for a performance testing system for a nuclear power plant filter, comprising: testing a test filter 52 for filtration efficiency, retention capacity, filtration flow rate and pressure differential, breakdown pressure, and circulation resistance using methods for testing filtration efficiency, retention capacity, flow rate and pressure differential, breakdown pressure, and circulation resistance. This allows for testing filtration efficiency, retention capacity, flow rate and pressure differential, breakdown pressure, and circulation resistance using the performance testing system for a nuclear power plant filter.

[0139] like Figure 2 As shown, the method for detecting filtration efficiency and the method for detecting retention capacity include the following steps:

[0140] Step S10: Circulating self-cleaning of the low-concentration liquid preparation system;

[0141] Open the second water inlet valve 6 to introduce deionized water into the first liquid dispensing tank 3, and measure the deionized water to a preset liquid level value through the first liquid level gauge 2; if the temperature of the deionized water is lower than or higher than 21°C-25°C; open the first liquid dispensing valve 4 and the eighth regulating valve 44 or the fifth regulating valve 35 and the fourth regulating valve 39, use steam or cooling water to maintain the water temperature in the liquid dispensing tank 3 at 21°C-25°C, and display the water temperature through the first thermometer 13, open the second liquid dispensing valve 9 and the third liquid dispensing valve 11, start the first liquid dispensing pump 7, so that the deionized water passes through the second liquid dispensing filter 12 and returns to the first liquid dispensing tank 3, and circulates and purifies in the low-concentration liquid dispensing system, open the first sampling valve 17 for sampling and testing, and when the number of particles larger than 2μm in every 100ml of deionized water is less than 6000, step S10-low-concentration liquid dispensing system circulation and self-purification is completed; and enter step S11;

[0142] Step S11: preparing low-concentration particulate matter;

[0143] Open the fourth dispensing valve 14 and the third dispensing valve 11; close the second dispensing valve 9, circulate the low-concentration dispensing system, add particulate matter to the first dispensing tank 3 at a ratio of 5 mg / L, and simultaneously start the first agitator 5. Ensure that the circulation lasts for 10 minutes so that the concentration of the low-concentration particulate matter solution in the low-concentration dispensing system reaches a uniform concentration; then proceed to step S15;

[0144] Step S13: Circulating self-cleaning of the high-concentration liquid preparation system;

[0145] Open the first water inlet valve 1 to introduce deionized water into the second liquid distribution tank 69, and measure the deionized water to a preset liquid level value through the second liquid level gauge 73; if the temperature of the deionized water is lower than or higher than 21°C-25°C; open the sixth liquid distribution valve 70 and the eighth regulating valve 44 or the fifth regulating valve 35 and the fourth regulating valve 39, use steam or cooling water to maintain the water temperature in the second liquid distribution tank 69 at 21°C-25°C, and display the water temperature through the second thermometer 64; open the seventh liquid distribution valve 68 and the fifth liquid distribution valve 19, start the fourth liquid distribution pump 71, so that the deionized water passes through the third filter 65 and returns to the second liquid distribution tank 69, and circulates and purifies in the high-concentration liquid distribution system; open the second sampling valve 66 for sampling and testing; when the number of particles larger than 2μm in every 100ml of deionized water is less than 6000; step S13: the high-concentration liquid distribution system circulation and self-purification is completed; enter step S14;

[0146] Step S14: preparing high-concentration particulate matter;

[0147] Open the eighth dispensing valve 67 and the fifth dispensing valve 19, close the seventh dispensing valve 68, and circulate the high-concentration dispensing system. Add particulate matter to the second dispensing tank 69 at a ratio of 100 mg / L. Simultaneously, start the second agitator 72 and ensure that the circulation lasts for 10 minutes until the concentration of the high-concentration particulate matter solution in the high-concentration dispensing system reaches a uniform concentration. Then proceed to step S16.

[0148] Filtration efficiency testing includes deep filter element testing and surface filter element testing of the same filter element; it also includes the following steps:

[0149] Step S15: deep filter element testing of the same filter element;

[0150] Open the first dispensing valve 4, the fourth dispensing valve 14, and the first test valve 16; start the first dispensing pump 7 and the second dispensing pump 15, while closing the third dispensing valve 11, so that the low-concentration particulate matter solution enters the test tank 25, and start the third agitator 27 to make the low-concentration particulate matter solution uniform. The flow rate is displayed by the first flow meter 18. When the liquid level in the first dispensing tank 3 is lower than the preset liquid level setting value, the first dispensing pump 7 stops running, and then the second dispensing pump 15 also stops running. When the third liquid level gauge 24 on the test tank 25 reaches the set liquid level, the test pump 63 starts, and the low-concentration particulate matter solution passes through the opened ninth test valve 62, the sixth test valve 58, and the test filter 52 with the depth filter element installed in sequence; and The water returns to the test tank 25 through the opened eighth test valve 32, the fifth test valve 30, and the third test valve 28. The pre-filtration solution is collected at the third sampling valve 54, and the post-filtration solution is collected at the fourth sampling valve 50 for testing. The third thermometer 61 displays the solution temperature, the differential pressure gauge 51 displays the pressure difference before and after filtration, the test filter 52, the first pressure gauge 55 displays the pressure before filtration, and the second pressure gauge 48 displays the pressure after filtration. Steam passes through the eighth regulating valve 44 or the fifth regulating valve 35, and cooling water passes through the fourth regulating valve 39, so that the water temperature in the test tank 25 is maintained at 21°C-25°C. When the pressure difference of the depth filter element reaches 150 kPa, the depth filter element testing of the same filter element is completed, and the process proceeds to step S17.

[0151] Step S16: Surface filter element detection of the same filter element;

[0152] Open the sixth dispensing valve 70, the eighth dispensing valve 67, and the second test valve 22; start the fourth dispensing pump 71 and the third dispensing pump 21, and at the same time close the fifth dispensing valve 19, so that the high-concentration particulate matter solution enters the test tank 25, and start the third agitator 27 to make the high-concentration particulate matter solution uniform. The flow rate is displayed by the second flow meter 23. When the liquid level in the second dispensing tank 69 is lower than the preset liquid level value, the fourth dispensing valve 71 stops running, and then the third dispensing pump 21 also stops running. When the third liquid level gauge 24 on the test tank 25 reaches the preset liquid level value, the test pump 63 starts, and the high-concentration particulate matter solution passes through the opened ninth test valve 62, the sixth test valve 58, and the test filter 52 with the deep filter element installed; and through the opened eighth test valve 62, the sixth test valve 58, and the test filter 52 with the deep filter element installed; The test valve 32, the fifth test valve 30, and the third test valve 28 return to the test tank 25. The pre-filtration solution is collected at the third sampling valve 54, and the post-filtration solution is collected at the fourth sampling valve 50 for testing. The third thermometer 61 displays the solution temperature, and the differential pressure gauge 51 displays the pressure difference of the test filter 52 before and after filtration. The first pressure gauge 55 displays the pre-filtration pressure, and the second pressure gauge 48 displays the post-filtration pressure. Steam passes through the eighth regulating valve 44 and the fifth regulating valve 35, and cooling water passes through the fourth regulating valve 39, maintaining the water temperature in the test tank 25 at 21°C-25°C. When the pressure difference of the deep filter element reaches 150 kPa, and when the pressure difference of the surface filter element reaches 250 kPa, the surface filter element testing of the same filter element is completed, and the process proceeds to step S17.

[0153] Step S17: interception capacity detection;

[0154] When the pressure difference of the test filter 52 equipped with a depth filter element reaches 150 kPa; when the pressure difference of the surface filter element of the test filter 52 equipped with a depth filter element reaches 250 kPa, the retention capacity test can be performed. The entire test solution is collected at the drain valve 26 at the lowest point of the performance test system for nuclear power plant filters, and the weight is compared with the initial weight to obtain the retention capacity; then the process proceeds to step S18;

[0155] Step S18: Cleaning the low-concentration liquid preparation system;

[0156] Open the second water inlet valve 6 to introduce deionized water into the first liquid dispensing tank 3. Measure the deionized water to a preset liquid level using the first liquid level gauge 2. Use the first thermometer 13 to display the water temperature. Open the first liquid dispensing valve 4, the second liquid dispensing valve 9, and the third liquid dispensing valve 11 in sequence. Start the first liquid dispensing pump 7 to allow the deionized water to pass through the second filter 12 and return to the first liquid dispensing tank 3 for circulation cleaning in the low-concentration liquid dispensing system. Open the first sampling valve 17 for sampling and testing. When the number of particles larger than 2 μm in every 100 ml of deionized water is less than 6,000, stop cleaning the low-concentration liquid dispensing system and proceed to step S19.

[0157] Step S19: Cleaning the high-concentration liquid preparation system

[0158] Open the first water inlet valve 1 to introduce deionized water into the second liquid distribution tank 69. The deionized water is measured to a preset level using the second liquid level gauge 73. The water temperature is displayed using the second thermometer 64. The sixth, seventh, and fifth liquid distribution valves 70, 68, and 19 are opened in sequence. The fourth liquid distribution pump 71 is started, allowing the deionized water to flow through the third filter 65 and return to the second liquid distribution tank 69. The deionized water is then circulated and cleaned in the high-concentration liquid distribution system until the second sampling valve 66 is opened for sampling and testing. When the number of particles larger than 2 μm per 100 ml of deionized water is less than 6,000, cleaning of the high-concentration liquid distribution system is stopped, and the process proceeds to step S20.

[0159] Step S20: cleaning the test system;

[0160] First, remove the test filter element from the test filter 52, open the third water inlet valve 8, and introduce deionized water into the test tank 25. When the third liquid level gauge 24 on the test tank 25 reaches a preset level, the test pump 63 is activated, and the deionized water passes through the opened ninth test valve 62, the seventh test valve 59, the fourth filter 57, the opened eighth test valve 32, and the opened fourth test valve 29, and returns to the test tank 25, where it is circulated and cleaned in the test system until the drain valve 26 is opened for sampling and testing. When the number of particles larger than 2 μm in every 100 ml of deionized water is less than 6,000, the cleaning test system stops and the process proceeds to step S21.

[0161] Step S21: emptying the test system;

[0162] The performance detection system for the nuclear power plant filter is closed, and the drain valve 26 at the lowest point of the performance detection system for the nuclear power plant filter is opened to drain the solution of the performance detection system for the nuclear power plant filter.

[0163] like Figure 3 As shown, the method for detecting the filtration flow rate and the pressure difference includes the following steps:

[0164] Step S31: The low-concentration liquid preparation system circulation self-purification method is the same as step S10, and after completion, proceed to step S34;

[0165] Step S32: Circulating self-cleaning of the high-concentration liquid preparation system is the same as step S13, and after completion, proceed to step S34;

[0166] Step S34: Test system detection

[0167] Open the sixth liquid dispensing valve 70 and the eighth liquid dispensing valve 67, and the second test valve 22; start the fourth liquid dispensing pump 71 and the third liquid dispensing pump 21, and at the same time close the fifth liquid dispensing valve 19, so that the solution that has completed self-purification in steps S31 and S32 enters the test tank 25, and the flow rate is displayed by the second flow meter 23. When the liquid level of the second liquid dispensing tank 69 is lower than the preset value, the fourth liquid dispensing pump 71 stops running. After the fourth liquid dispensing pump 71 stops, the third liquid dispensing pump 21 also stops running. When the third liquid level gauge 24 on the test tank 25 reaches the preset liquid level, the test pump 63 is started, and the solution passes through the opened ninth test valve 62 and the sixth test valve 58, and the test filter 52 without the filter element installed in sequence; the opened eighth test valve 32, the third test valve 58, and the test filter 52 without the filter element installed in sequence. The fifth test valve 30 and the third test valve 28 return the liquid to the test tank 25. The third thermometer 61 displays the temperature of the solution. The differential pressure gauge 51 displays the pressure difference of the test filter 52 before and after filtration. The first pressure gauge 55 displays the pressure of the test filter 52 before filtration. The second pressure gauge 48 displays the pressure of the test filter 52 after filtration. Steam passes through the eighth regulating valve 44 or the fifth regulating valve 35 and the fourth regulating valve 39. Heating water or cooling water is used to maintain the water temperature in the test tank 25 between 21°C and 25°C. The eighth test valve 32 and the sixth test valve 58 are adjusted so that the flow rate through the test filter 52 housing is 1.2 times the standard flow rate of the filter element. The flow rate of the solution is observed by the second flowmeter 23 and the flow rate data is recorded. The process then proceeds to step S35.

[0168] Step S35: adjusting the flow rate;

[0169] When the circulation flow rate reaches stability, adjust the eighth test valve 32 and the sixth test valve 58 so that the flow rate through the test filter 52 housing is 0.2 to 1.2 times the set flow rate of the filter element, with the flow rate increment being 0.2 times each time. Observe the flow rate through the second flow meter 23, and simultaneously observe and record the corresponding pressure difference displayed by the differential pressure gauge 51; record the first pressure difference data;

[0170] After the test filter 52 housing is inspected, the test pump 63 is stopped. After the filter element to be tested is installed in the test filter 52, the test pump 63 is restarted. The eighth test valve 32 and the sixth test valve 58 are adjusted so that the flow rate through the test filter 52 is 0.2 to 1.2 times the set flow rate of the filter element, with the flow rate increment being 0.2 times each time. The flow rate is observed using the second flow meter 23, and the corresponding pressure difference displayed by the differential pressure gauge 51 is observed and recorded. The second pressure difference data is recorded, and the process proceeds to step S36.

[0171] Step S36: Calculate the pressure drop generated by the test filter element in the test filter 52. The measured value is obtained by subtracting the first pressure difference data from the second pressure difference data in step S35. The measured value is the pressure drop value of the filter housing and the filter element together; then proceed to step S37.

[0172] Step S37: emptying the test system;

[0173] Close the performance detection system for the nuclear power plant filter, first take out the test filter element, and then open the drain valve 26 at the lowest point of the performance detection system for the nuclear power plant filter to drain the solution of the performance detection system for the nuclear power plant filter.

[0174] like Figure 4 As shown, the method for detecting the failure pressure includes the following steps:

[0175] Step S41: The low-concentration liquid preparation system circulation self-cleaning method is the same as step S10, and after completion, proceed to step S42;

[0176] Step S42: The method for preparing low-concentration particulate matter circulated by the low-concentration liquid preparation system is the same as step S11;

[0177] Step S43: The high-concentration liquid preparation system circulation self-cleaning method is the same as step S13, and after completion, proceed to step S44;

[0178] Step S44: The method for preparing high-concentration particulate matter in the high-concentration liquid preparation system is the same as step S14; after completion, proceed to step S45;

[0179] Step S45: Destruction pressure detection;

[0180] Open the sixth liquid dispensing valve 70, the eighth liquid dispensing valve 67 and the test valve 22; start the fourth liquid dispensing pump 71 and the third liquid dispensing pump 21, and at the same time close the fifth liquid dispensing valve 19, so that the high-concentration particulate matter solution in step S44 enters the test tank 25, and the flow rate is displayed by the second flow meter 23; when the liquid level of the second liquid dispensing tank 69 is lower than the preset value, the fourth liquid dispensing pump 71 stops running. After the fourth liquid dispensing pump 71 stops, the third liquid dispensing pump 21 also stops running. When the third liquid level gauge 24 on the test tank 25 reaches the set liquid level, the test pump 63 starts, and the high-concentration particulate matter solution passes through the opened ninth test valve 62 and the opened sixth test valve 58 in sequence; the test filter 52 with the filter element installed, the opened third test valve 58, and the opened fourth test valve 58. The eighth test valve 32, the fifth test valve 30, and the third test valve 28 return to the test tank 25. The third thermometer 61 displays the temperature of the high-concentration particulate matter solution, the differential pressure gauge 51 displays the pressure difference before and after filtration of the test filter 52, the first pressure gauge 55 displays the pressure before filtration, and the second pressure gauge 48 displays the pressure after filtration. Steam passes through the eighth regulating valve 44 or the fifth regulating valve 35 and the fourth regulating valve 39. Heating water or cooling water is used to maintain the water temperature in the test tank 25 between 21°C and 25°C. The eighth test valve 32 and the sixth test valve 58 are adjusted so that the flow rate through the shell of the test filter 52 reaches the set flow rate. The differential pressure and flow rate through the test filter 52 at this time are recorded.

[0181] If the pressure difference continues to increase steadily during the detection process, step S45 is repeated.

[0182] If the pressure difference decreases or remains constant for at least 3 minutes during the test, stop the test and note the point at which the pressure difference changes; proceed to step S46;

[0183] Step S46: Cleaning the high-concentration liquid preparation system is the same as step S19; proceed to step S47;

[0184] Step S47: The test system cleaning method is the same as step S20; proceed to step S48;

[0185] Step S48: Empty the test system

[0186] Close the performance detection system for the nuclear power plant filter, first take out the test filter element, and then open the drain valve 26 at the lowest point of the performance detection system for the nuclear power plant filter to drain the solution of the performance detection system for the nuclear power plant filter.

[0187] like Figure 5 As shown, the method for detecting circulation resistance also includes the following steps:

[0188] Step S50: The high-concentration liquid preparation system circulation self-cleaning method is the same as step S13, and after completion, it proceeds to step S51;

[0189] Step S51: test system cycle;

[0190] Open the sixth liquid dispensing valve 70, the eighth liquid dispensing valve 67 and the test valve 22; start the fourth liquid dispensing pump 71 and the third liquid dispensing pump 21, and at the same time close the fifth liquid dispensing valve 19, so that the high-concentration particulate matter solution in step S44 enters the test tank 25, and the flow rate is displayed by the second flow meter 23; when the liquid level of the second liquid dispensing tank 69 is lower than the preset value, the fourth liquid dispensing pump 71 stops running. After the fourth liquid dispensing pump 71 stops, the third liquid dispensing pump 21 also stops running. When the third liquid level gauge 24 on the test tank 25 reaches the set liquid level, the test pump 63 starts, and the high-concentration particulate matter solution passes through the opened ninth test valve 62 and the sixth test valve 58 in sequence; the test filter 52 with the filter element installed, the opened eighth test valve 32, the opened fifth test valve 58, the opened eighth test valve 32, the opened fifth test valve 59, the opened eighth test valve 33, the opened fifth test valve 58, the opened eighth test valve 34, the opened fifth test valve 59, the opened eighth test valve 35, the opened fifth test valve 58, the opened ninth test valve 62, and the opened sixth test valve 58. The test valve 30 and the third test valve 28 return to the test tank 25. The temperature of the high-concentration particulate matter solution is displayed by the third thermometer 61. The differential pressure gauge 51 displays the pressure difference between the filter before and after filtration of the test filter 52. The first pressure gauge 55 displays the pressure before filtration. The second pressure gauge 48 displays the pressure after filtration. The steam passes through the eighth regulating valve 44 or the fifth regulating valve 35 and the fourth regulating valve 39. The water temperature in the test tank 25 is maintained between 21°C and 25°C using heating water or cooling water. The eighth test valve 32 and the sixth test valve 58 are adjusted so that the flow rate through the shell of the test filter 52 is 10-20 L / min. The flow rate is observed by the second flow meter 23, and the number of cycles is counted by the counter. The process then proceeds to step S52.

[0191] Step S52: Result judgment;

[0192] When the circulation flow rate reaches a stable state, the test pump 63 is stopped, the filter element to be tested is loaded into the test filter 52, the test pump 63 is started, and the eighth test valve 32 and the sixth test valve 58 are adjusted so that the pressure difference across the test filter 52 reaches 200 kPa. The pressure difference across the test filter 52 is recorded by the differential pressure gauge 51, and the process proceeds to step S53.

[0193] Step S53: Record

[0194] Record the pressure difference during the entire test period; detect the minimum and maximum pressures in the steady state; proceed to step S54;

[0195] Step S54: Empty the test system

[0196] Close the performance detection system for the nuclear power plant filter, first take out the test filter element, and then open the drain valve 26 at the lowest point of the performance detection system for the nuclear power plant filter to drain the solution of the performance detection system for the nuclear power plant filter.

[0197] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and that in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A performance detection system for a nuclear power plant filter, characterized in that: include: A low-concentration liquid dispensing system is provided at the front end of the performance testing system for the nuclear power plant filter; A high-concentration liquid dispensing system, wherein the high-concentration liquid dispensing system and the low-concentration liquid dispensing system are arranged in parallel; A mixing configuration system, wherein the outlet of the low-concentration liquid configuration system and the outlet of the high-concentration liquid configuration system are both connected to the mixing configuration system; A test filtration system, wherein the outlet of the mixing configuration system is connected to the inlet of the test filtration system; standard particles configured in the low-concentration liquid configuration system and the high-concentration liquid configuration system are injected into the test filtration system, and the test filtration system uses the standard particles to detect the filter to be tested; A heating and cooling system is connected to the test filtration system to heat or cool the test filtration system; The hybrid configuration system further includes: A third liquid level gauge is provided on one side of the test tank in the mixing configuration system. The third liquid level gauge is connected to the inlet of the test pump, and the inlet of the test pump is also connected to the outlet of the test tank; a ninth liquid dispensing valve is provided at the outlet of the test tank; The test tank in the hybrid configuration system is connected to the inlets of the third test valve and the fourth test valve respectively, the outlet of the third test valve is connected to the inlet of the fifth test valve, the inlet of the third test valve is connected to a drain valve, the outlet of the fifth test valve is connected to the inlet of a third flow meter, and the third flow meter is connected to the outlet of the heat exchanger of the heating and cooling system; The test tank in the mixing configuration system is also connected to the inlet of the sixth test valve and the inlet of the seventh test valve in the test filtration system; a third thermometer and a temperature sensor are arranged in series on the pipeline from the test tank to the inlet of the sixth test valve and the inlet of the seventh test valve, for measuring the temperature of the fluid of the standard particulate matter.

2. The performance detection system for nuclear power plant filters according to claim 1, characterized in that: The low-concentration liquid preparation system further includes: A first liquid dispensing tank is connected to the outlet of the second water inlet valve above the first liquid dispensing tank; the inlet of the second water inlet valve is connected to the deionized water inlet; the deionized water inlet is also connected to the inlet of the first water inlet valve and the inlet of the third water inlet valve; the outlet of the first water inlet valve is connected to the second liquid dispensing tank in the high-concentration liquid dispensing system; the outlet of the third water inlet valve is connected to the test tank in the mixed dispensing system; a water outlet valve is provided at the outlet of the third water inlet valve; and a first filter is provided between the inlet of the water outlet valve and the outlet of the third water inlet valve; The inlet of the third liquid dispensing valve is connected to the first liquid dispensing tank, the outlet of the third liquid dispensing valve is connected to the inlet of the second liquid dispensing pump, the outlet of the second liquid dispensing pump is connected to the inlet of the first test valve; the outlet of the first test valve is connected to the inlet of the first flow meter, and the outlet of the first flow meter is connected to the test tank in the mixing configuration system; The outlet of the first liquid level gauge is connected to one side of the first liquid dispensing tank; the inlet of the first liquid level gauge and the outlet of the first liquid dispensing tank are both connected to the inlet of the first liquid dispensing pump, and a first liquid dispensing valve is connected to one side of the pipeline between the outlet of the first liquid dispensing tank and the first liquid dispensing pump; the outlet of the first liquid dispensing pump is respectively connected to the inlet of the second liquid dispensing valve and the inlet of the fourth liquid dispensing valve; the two ends of the second liquid dispensing valve are respectively connected to the inlet of the second filter and the inlet of the fourth liquid dispensing valve; A first thermometer is connected to the pipeline from the outlet of the second filter to the second liquid distribution pump; at the same time, the outlet of the fourth liquid distribution valve is connected to the inlet of the second liquid distribution pump and the inlet of the first sampling valve respectively; The outlet of the second liquid distribution pump is connected to the inlet of the first test valve; the outlet of the first test valve is connected to the test tank in the mixing configuration system.

3. The performance detection system for nuclear power plant filters according to claim 2, characterized in that: The high-concentration liquid preparation system further includes: Connecting the outlet of the first water inlet valve to the second liquid dispensing tank; adding deionized water to the second liquid dispensing tank; The inlet of the fifth liquid dispensing valve is connected to the second liquid dispensing tank, the outlet of the fifth liquid dispensing valve is connected to the inlet of the third liquid dispensing pump, the outlet of the third liquid dispensing pump is connected to the inlet of the second test valve; the outlet of the second test valve is connected to the inlet of the second flow meter, and the outlet of the second flow meter is connected to the test tank in the mixing configuration system; The outlet of the second liquid level gauge is connected to one side of the second liquid dispensing tank; the inlet of the second liquid level gauge and the outlet of the second liquid dispensing tank are both connected to the inlet of the fourth liquid dispensing pump, and a sixth liquid dispensing valve is connected to one side of the pipeline between the outlet of the second liquid dispensing tank and the fourth liquid dispensing pump; The two ends of the seventh liquid dispensing valve are respectively connected to the inlet of the third filter and the inlet of the eighth liquid dispensing valve; a second thermometer is connected to the pipeline from the outlet of the third filter to the third liquid dispensing pump; at the same time, the outlet of the eighth liquid dispensing valve is respectively connected to the inlet of the third liquid dispensing pump and the inlet of the second sampling valve; The outlet of the third liquid distribution pump is connected to the inlet of the second test valve; the outlet of the second test valve is connected to the test tank in the mixing configuration system.

4. The performance detection system for nuclear power plant filters according to claim 1, characterized in that: The test filtration system further comprises: The outlet of the seventh test valve is connected to the inlet of the fourth filter; the outlet of the fourth filter is connected in parallel with the outlet of the sixth test valve and then connected to the inlet of the test filter; a first pressure sensor, a first pressure gauge and a third sampling valve are arranged in series on the pipeline from the outlet of the sixth test valve to the inlet of the test filter; a differential pressure gauge and an online detector are respectively arranged in parallel at both ends of the test filter; the outlet of the test filter is connected to the inlet of the eighth test valve; a fourth sampling valve, a second pressure sensor and a second pressure gauge are respectively arranged in series on the pipeline from the outlet of the test filter to the inlet of the eighth test valve; the outlet of the eighth test valve is connected to the inlet of the heat exchanger of the heating and cooling system.

5. The performance detection system for nuclear power plant filters according to claim 1, characterized in that: The heating and cooling system further comprises: The steam inlet is connected to the pipeline on the heat source inlet side of the heat exchanger of the heating and cooling system, which is connected in series with the first regulating valve, the fifth filter, the second regulating valve, and the third regulating valve; the steam inlet is connected to the steam generator; The cooling water inlet is connected to the pipeline on the heat source inlet side of the heat exchanger of the heating and cooling system in series with the fourth regulating valve, the sixth filter, and the fifth regulating valve; the pipeline from the cooling water inlet to the heat source inlet side of the heat exchanger is arranged in parallel with the pipeline from the steam inlet to the heat source inlet side of the heat exchanger; the cooling water inlet is connected to the mold temperature controller; The steam condensate return port is connected to the pipeline on the heat source outlet side of the heat exchanger of the heating and cooling system, which is connected in series with the sixth regulating valve, the seventh filter, and the seventh regulating valve in sequence. At the same time, the pipeline from the steam condensate return port to the heat source outlet side of the heat exchanger is connected in parallel to both ends of the eighth regulating valve; The cooling water outlet is connected to the pipeline on the heat source outlet side of the heat exchanger of the heating and cooling system, and the two ends of the ninth regulating valve are connected in parallel; the cooling water outlet is connected to the mold temperature controller.

6. The performance detection system for nuclear power plant filters according to claim 2, characterized in that: A first agitator is arranged inside the first liquid dispensing tank; a second agitator is arranged inside the second liquid dispensing tank and a third agitator is arranged inside the test tank for stirring the first liquid dispensing tank, the second liquid dispensing tank and the test tank.

7. A detection method for a performance detection system of a nuclear power plant filter according to any one of claims 1 to 6, characterized in that: include: The test filter is tested for filtration efficiency, retention capacity, flow rate and pressure difference, breaking pressure and circulation resistance according to the test method of filtration efficiency, retention capacity, flow rate and pressure difference, breaking pressure and circulation resistance; The method for detecting filtration efficiency and interception capacity comprises the following steps: Step S10: Circulating self-cleaning of the low-concentration liquid preparation system; Open the second water inlet valve to introduce deionized water into the first liquid dispensing tank, and measure the deionized water to a preset liquid level value using the first liquid level gauge; if the temperature of the deionized water is lower than or higher than 21°C-25°C; use steam or cooling water to maintain the water temperature in the first liquid dispensing tank at 21°C-25°C, and display the water temperature on the first thermometer; open the second liquid dispensing valve and the third liquid dispensing valve, start the first liquid dispensing pump, and allow the deionized water to pass through the second liquid dispensing filter and return to the first liquid dispensing tank for circulation and self-purification in the low-concentration liquid dispensing system; open the first sampling valve to take samples for testing; when there are less than 6,000 particles larger than 2 μm in every 100 ml of deionized water, step S10-low-concentration liquid dispensing system circulation and self-purification is completed; and proceed to step S11; Step S11: preparing low-concentration particulate matter; Open the fourth and third dispensing valves; close the second dispensing valve, circulate the low-concentration dispensing system, add particulate matter to the first dispensing tank at a ratio of 5 mg / L, and simultaneously start the first agitator. Ensure that the circulation lasts for 10 minutes so that the concentration of the low-concentration particulate matter solution in the low-concentration dispensing system reaches a uniform concentration; then proceed to step S15; Step S13: Circulating self-cleaning of the high-concentration liquid preparation system; Open the first water inlet valve to introduce deionized water into the second liquid dispensing tank, and measure the deionized water to a preset liquid level value using the second liquid level gauge; if the temperature of the deionized water is lower than or higher than 21°C-25°C; use steam or cooling water to maintain the water temperature in the second liquid dispensing tank at 21°C-25°C, and display the water temperature on the second thermometer; open the seventh liquid dispensing valve and the fifth liquid dispensing valve, start the fourth liquid dispensing pump, and allow the deionized water to pass through the third filter and return to the second liquid dispensing tank, and circulate and self-purify in the high-concentration liquid dispensing system; open the second sampling valve to take samples for testing; when the number of particles larger than 2 μm in every 100 ml of deionized water is less than 6,000; step S13: the high-concentration liquid dispensing system circulation and self-purification are completed; and step S14 is entered; Step S14: preparing high-concentration particulate matter; Open the eighth and fifth dispensing valves, close the seventh dispensing valve, circulate the high-concentration dispensing system, add particulate matter to the second dispensing tank at a ratio of 100 mg / L, and simultaneously start the second agitator. Ensure that the circulation lasts for 10 minutes so that the concentration of the high-concentration particulate matter solution in the high-concentration dispensing system reaches a uniform concentration; then proceed to step S16; The filtration efficiency test includes a deep filter element test and a surface filter element test of the same filter element; and also includes the following steps: Step S15: deep filter element testing of the same filter element; Open the first liquid dispensing valve, the fourth liquid dispensing valve, and the first test valve; start the first liquid dispensing pump and the second liquid dispensing pump, while closing the third liquid dispensing valve, so that the low-concentration particulate matter solution enters the test tank, and start the third agitator to make the low-concentration particulate matter solution uniform. The flow rate is displayed by the first flow meter. When the liquid level in the first liquid dispensing tank is lower than the preset liquid level setting value, the first liquid dispensing pump stops running, and then the second liquid dispensing pump also stops running. When the third liquid level gauge on the test tank reaches the set liquid level, the test pump starts, and the low-concentration particulate matter solution passes through the opened ninth test valve, the opened sixth test valve, and the test filter with the installed depth filter element in sequence; and The solution is returned to the test tank through the opened eighth test valve, the fifth test valve, and the third test valve; the pre-filtration solution is collected at the third sampling valve, and the post-filtration solution is collected at the fourth sampling valve for testing. The solution temperature is displayed on the third thermometer, the pressure difference of the test filter before and after filtration is displayed on the differential pressure gauge, the pressure before filtration is displayed on the first pressure gauge, and the pressure after filtration is displayed on the second pressure gauge. The water temperature in the test tank is maintained at 21°C-25°C using steam or cooling water through the eighth regulating valve or the fifth regulating valve and the fourth regulating valve. When the pressure difference of the depth filter element reaches 150KPa, the depth filter element testing of the same filter element is completed; and step S17 is entered; Step S16: Surface filter element detection of the same filter element; Open the sixth liquid dispensing valve, the eighth liquid dispensing valve and the second test valve; start the fourth liquid dispensing pump and the third liquid dispensing pump, and at the same time close the fifth liquid dispensing valve, so that the high-concentration particulate matter solution enters the test tank, and start the third agitator to make the high-concentration particulate matter solution uniform, and display the flow rate through the second flow meter. When the liquid level of the second liquid dispensing tank is lower than the preset liquid level value, the fourth liquid dispensing valve stops running, and then the third liquid dispensing pump also stops running. When the third liquid level gauge on the test tank reaches the preset liquid level value, the test pump starts, and the high-concentration particulate matter solution passes through the opened ninth test valve, the sixth test valve and the test filter with the deep filter element installed in sequence; and through the opened eighth test valve. The first regulating valve, the fifth regulating valve, and the third regulating valve are used to return the test tank to the test tank. The solution before filtration is collected at the third sampling valve, and the solution after filtration is collected at the fourth sampling valve for testing. The solution temperature is displayed by the third thermometer, and the pressure difference of the test filter before and after filtration is displayed by the differential pressure gauge. The first pressure gauge displays the pressure before filtration, and the second pressure gauge displays the pressure after filtration. The water temperature in the test tank is maintained at 21°C-25°C using steam or cooling water through the eighth regulating valve or the fifth regulating valve and the fourth regulating valve. When the pressure difference of the deep filter element reaches 150 kPa and when the pressure difference of the surface filter element reaches 250 kPa, the surface filter element test of the same filter element is completed and the process proceeds to step S17. Step S17: interception capacity detection; When the pressure difference of the test filter equipped with a depth filter element reaches 150 kPa; when the pressure difference of the surface filter element of the test filter equipped with a depth filter element reaches 250 kPa, the retention capacity test can be performed. The entire test solution is collected at the drain valve at the lowest point of the performance test system for nuclear power plant filters, and the weight is compared with the initial weight to obtain the retention capacity; then the process proceeds to step S18; Step S18: Cleaning the low-concentration liquid preparation system; Open the second water inlet valve to introduce deionized water into the first liquid dispensing tank, and measure the deionized water to a preset liquid level value using the first liquid level gauge; use the first thermometer to display the water temperature, and sequentially open the first liquid dispensing valve, the second liquid dispensing valve, and the third liquid dispensing valve; start the first liquid dispensing pump to allow the deionized water to pass through the second filter and return to the first liquid dispensing tank, where it is circulated and cleaned in the low-concentration liquid dispensing system; until the first sampling valve is opened for sampling and testing, when the number of particles larger than 2 μm in every 100 ml of deionized water is less than 6,000, stop cleaning the low-concentration liquid dispensing system and proceed to step S19; Step S19: Cleaning the high-concentration liquid preparation system Open the first water inlet valve to introduce deionized water into the second liquid dispensing tank, and measure the deionized water to a preset liquid level value using the second liquid level gauge; display the water temperature using the second thermometer, sequentially open the sixth liquid dispensing valve, the seventh liquid dispensing valve, and the fifth liquid dispensing valve, and start the fourth liquid dispensing pump to allow the deionized water to pass through the third filter and return to the second liquid dispensing tank, where it is circulated and cleaned in the high-concentration liquid dispensing system until the second sampling valve is opened for sampling and testing. When the number of particles larger than 2 μm in every 100 ml of deionized water is less than 6,000, the cleaning of the high-concentration liquid dispensing system is stopped, and the process proceeds to step S20; Step S20: cleaning the test system; First, remove the test filter element from the test filter, open the third water inlet valve, and introduce deionized water into the test tank. When the third liquid level gauge on the test tank reaches a preset liquid level, the test pump is started, and the deionized water passes through the opened ninth test valve, the opened seventh test valve, the fourth filter, the opened eighth test valve, and the opened fourth test valve in sequence, and returns to the test tank, performing a circulation cleaning in the test system. The cleaning test system stops when the number of particles larger than 2 μm in each ml of deionized water is less than 6,000, and the process proceeds to step S21. Step S21: emptying the test system; The performance detection system for the nuclear power plant filter is closed, and the drain valve at the lowest point of the performance detection system for the nuclear power plant filter is opened to discharge the solution of the performance detection system for the nuclear power plant filter.

8. The detection method for a performance detection system of a nuclear power plant filter according to claim 7, characterized in that: The method for detecting the filtration flow rate and the pressure difference comprises the following steps: Step S31: The low-concentration liquid preparation system circulation self-purification method is the same as step S10 described in claim 7, and after completion, proceeds to step S34; Step S32: The high-concentration liquid preparation system circulates and self-cleans, which is the same as step S13 described in claim 7. After completion, the process proceeds to step S34; Step S34: Test system detection Open the sixth liquid dispensing valve and the eighth liquid dispensing valve, and the second test valve; start the fourth liquid dispensing pump and the third liquid dispensing pump, and at the same time close the fifth liquid dispensing valve, so that the solution after self-purification in step S31 and step S32 enters the test tank, and the flow rate is displayed by the second flow meter. When the liquid level of the second liquid dispensing tank is lower than the preset value, the fourth liquid dispensing pump stops running. After the fourth liquid dispensing pump stops, the third liquid dispensing pump also stops running. When the third liquid level gauge on the test tank reaches the preset liquid level, the test pump starts, and the solution passes through the opened ninth test valve and the sixth test valve, and the test filter without the filter element installed in turn; open the eighth test valve, The fifth test valve and the third test valve return to the test tank; the temperature of the solution is displayed by the third thermometer; the differential pressure gauge displays the pressure difference of the test filter before and after filtration, the first pressure gauge displays the pressure of the test filter before filtration, and the second pressure gauge displays the pressure of the test filter after filtration. Steam passes through the eighth regulating valve and the fifth regulating valve or cooling water passes through the fourth regulating valve to maintain the water temperature in the test tank between 21°C and 25°C. The eighth test valve and the sixth test valve are adjusted so that the flow rate through the test filter housing is 1.2 times the standard flow rate of the filter element. The flow rate of the solution is observed by the second flow meter and the flow rate data is recorded; and step S35 is entered; Step S35: adjusting the flow rate; When the circulation flow rate reaches stability, adjust the eighth test valve and the sixth test valve so that the flow rate through the test filter housing is 0.2 to 1.2 times the set flow rate of the filter element, with the flow rate increased by 0.2 times each time. Observe the flow rate using the second flow meter and simultaneously observe and record the corresponding pressure difference displayed by the differential pressure gauge; record the first pressure difference data; After the test filter housing is inspected, the test pump is stopped. After the filter element to be tested is installed in the test filter, the test pump is restarted. The eighth test valve and the sixth test valve are adjusted so that the flow rate through the test filter is 0.2 to 1.2 times the set flow rate of the filter element, with the flow rate increased by 0.2 times each time. The flow rate is observed using a second flow meter, and the corresponding pressure difference displayed by the differential pressure gauge is observed and recorded. The second pressure difference data is recorded, and the process proceeds to step S36. Step S36: Calculate the pressure drop generated by the test filter element in the test filter. Subtract the first pressure differential data from the second pressure differential data in step S35 to obtain a measured value. The measured value is the pressure drop value of the filter housing and the filter element together. Then proceed to step S37. Step S37: emptying the test system; Close the performance detection system for the nuclear power plant filter, first remove the test filter element, and then open the drain valve at the lowest point of the performance detection system for the nuclear power plant filter to drain the solution of the performance detection system for the nuclear power plant filter.

9. The detection method for a performance detection system of a nuclear power plant filter according to claim 7, characterized in that: The method for detecting the failure pressure comprises the following steps: Step S41: The low-concentration liquid preparation system circulation self-purification method is the same as step S10, and after completion, proceed to step S42; Step S42: the method for preparing low-concentration particulate matter circulated by the low-concentration liquid preparation system is the same as step S11; Step S43: The high-concentration liquid preparation system circulation self-purification method is the same as step S13, and after completion, proceed to step S44; Step S44: The method for preparing high-concentration particulate matter in the high-concentration liquid preparation system is the same as step S14; after completion, proceed to step S45; Step S45: Destruction pressure detection; Open the sixth liquid dispensing valve, the eighth liquid dispensing valve and the test valve; start the fourth liquid dispensing pump and the third liquid dispensing pump, and at the same time close the fifth liquid dispensing valve, so that the high-concentration particulate matter solution in step S44 enters the test tank, and the flow rate is displayed by the second flow meter; when the liquid level of the second liquid dispensing tank is lower than the preset value, the fourth liquid dispensing pump stops running, and after the fourth liquid dispensing pump stops, the third liquid dispensing pump also stops running. When the third liquid level gauge on the test tank reaches the set liquid level, the test pump starts, and the high-concentration particulate matter solution passes through the opened ninth test valve and the sixth test valve in sequence; the test filter with the filter element installed, the opened The eighth test valve, the fifth test valve, and the third test valve are returned to the test tank. The temperature of the high-concentration particulate matter solution is displayed by the third thermometer, the pressure difference of the test filter before and after filtration is displayed by the differential pressure gauge, the pressure before filtration is displayed by the first pressure gauge, and the pressure after filtration is displayed by the second pressure gauge. Steam passes through the eighth regulating valve and the fifth regulating valve or cooling water passes through the fourth regulating valve to maintain the water temperature in the test tank between 21°C and 25°C. The eighth test valve and the sixth test valve are adjusted so that the flow rate through the test filter housing reaches the set flow rate. The pressure difference and flow rate through the test filter at this time are recorded. If the pressure difference continues to increase steadily during the detection process, step S45 is repeated; If the pressure difference decreases or remains constant for at least 3 minutes during the test, stop the test and note the point at which the pressure difference changes; proceed to step S46; Step S46: The cleaning of the high-concentration liquid preparation system is the same as step S19; proceed to step S47; Step S47: The test system cleaning method is the same as step S19; proceed to step S48; Step S48: Empty the test system Close the performance detection system for the nuclear power plant filter, first remove the test filter element, and then open the drain valve at the lowest point of the performance detection system for the nuclear power plant filter to drain the solution of the performance detection system for the nuclear power plant filter.

10. The detection method for a performance detection system of a nuclear power plant filter according to claim 7, characterized in that: The method for detecting circulation resistance further comprises the following steps: Step S50: The high-concentration liquid preparation system circulation self-cleaning method is the same as step S13, and after completion, proceed to step S51; Step S51: test system cycle; Open the sixth liquid dispensing valve, the eighth liquid dispensing valve and the test valve; start the fourth liquid dispensing pump and the third liquid dispensing pump, and at the same time close the fifth liquid dispensing valve, so that the solution in step S50 enters the test tank, and the flow rate is displayed by the second flow meter; when the liquid level of the second liquid dispensing tank is lower than the preset value, the fourth liquid dispensing pump stops running, and after the fourth liquid dispensing pump stops, the third liquid dispensing pump also stops running. When the third liquid level gauge on the test tank reaches the set liquid level, the test pump starts, and the high-concentration particulate matter solution passes through the opened ninth test valve and the sixth test valve in sequence; the test filter with the filter element installed, the opened eighth test valve, the fifth test valve, the third test valve, The valve returns to the test tank, the temperature of the high-concentration particulate matter solution is displayed by a third thermometer, the pressure difference of the test filter before and after filtration is displayed by a differential pressure gauge, the pressure before filtration is displayed by a first pressure gauge, and the pressure after filtration is displayed by a second pressure gauge. Steam passes through the eighth regulating valve and the fifth regulating valve, or cooling water passes through the fourth regulating valve, so that the water temperature in the test tank is maintained between 21°C and 25°C. The eighth test valve and the sixth test valve are adjusted so that the flow rate through the test filter housing is 10 L / min to 20 L / min. The flow rate is observed by a second flow meter, and the number of cycles is counted by a counter; then the process proceeds to step S52; Step S52: Result judgment; When the circulation flow rate reaches a stable state, the test pump is stopped, the filter element to be tested is loaded into the test filter, the test pump is started, and the eighth test valve and the sixth test valve are adjusted so that the pressure difference across the test filter reaches 200 kPa. The pressure difference across the test filter is recorded by a differential pressure gauge; then the process proceeds to step S53; Step S53: record; Record the pressure difference during the entire test period; detect the minimum and maximum pressures in the steady state; proceed to step S54; Step S54: Empty the test system Close the performance detection system for the nuclear power plant filter, first remove the test filter element, and then open the drain valve at the lowest point of the performance detection system for the nuclear power plant filter to drain the solution of the performance detection system for the nuclear power plant filter.

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