A flushing method for the drum strainer liquid level gauge of a nuclear power plant

Abstract

This application is dedicated to providing a method for flushing the drum strainer liquid level gauge in a nuclear power plant, including: using the sewage drainage pump corresponding to the sewage collection sump in the pump pit of the circulating water system to discharge the production sewage in the sewage collection sump to the waste water collection pool of the demineralized water production system; using at least one drainage pump provided in the waste water collection pool of the demineralized water production system to discharge the sewage in the sewage collection sump in the pump pit of the circulating water system and the waste water of the demineralized water production system collected in the waste water collection pool of the demineralized water production system to the drum strainer liquid level gauge sleeve for flushing. This application solves the problems of high cost and affecting the safe and stable operation of users in the existing flushing method of the drum strainer liquid level gauge in a nuclear power plant by making full use of the production sewage in the nuclear power plant.

Description

Technical Field

[0001] This application belongs to the technical field of nuclear power plant operation, and specifically relates to a method for flushing the drum strainer liquid level gauge in a nuclear power plant. Background Art

[0002] During the operation of a nuclear power plant, the high water level pressure difference alarm of the drum strainer is extremely prone to frequent triggering, seriously affecting the main control operator's monitoring of the panel and the judgment of the clogging situation of the drum strainer. The reason is that the seawater contains a large amount of sediment. During the rising tide of the seawater, the sleeve where the drum strainer liquid level gauge is located is prone to sediment deposition, resulting in sleeve blockage. For a real - shot picture of the drum strainer liquid level gauge sleeve, refer to Figure 1 In the initial design of the nuclear power plant, refer to Figure 2 The flushing water of the drum strainer liquid level gauge sleeve 100 comes from the waste water collection tank 1 of the demineralized water production system. The first drainage pump 2 and the second drainage pump 3 are used to drain the waste water in the waste water collection tank 1 of the demineralized water production system into the drum strainer liquid level gauge sleeve 100 for flushing. However, there is no incoming water in the waste water collection tank 1 of the demineralized water production system under normal circumstances. Only during the operation of the demineralized water production system in the nuclear power plant, the demineralized water production system waste water a is discharged into the waste water collection tank 1 of the demineralized water production system, about once every two weeks, and the water supply is far from enough to meet the water volume required for flushing the drum strainer liquid level gauge sleeve 100.

[0003] After a large amount of long - term research work, currently, measures are taken to deviate from the normal operation mode. A path of flushing water is introduced from the production water system of the nuclear power plant to continuously flush the drum strainer liquid level gauge sleeve 100, so that the problem of frequent triggering of the high water level pressure difference alarm of the drum strainer is solved. However, this method has disadvantages: it consumes a large amount of production water resources, with a cost of about 2000 yuan per day and about 730,000 yuan per year; it also causes the pressure of the production water pipe network to drop, affecting the normal supply pressure of the production water system to the designed users and the safe and stable operation of the users. Summary of the Invention

[0004] In view of this, this application is committed to providing a method for flushing the drum strainer liquid level gauge in a nuclear power plant, by making full use of the production sewage in the nuclear power plant to solve the problems of high cost and affecting the safe and stable operation of the production water system users in the existing method for flushing the drum strainer liquid level gauge in a nuclear power plant.

[0005] The first aspect of this application provides a method for flushing the drum strainer liquid level gauge in a nuclear power plant. The method for flushing the drum strainer liquid level gauge in a nuclear power plant includes:

[0006] Step 1: Use the sewage drainage pump corresponding to the sewage collection pit in the pump pit of the circulating water system to drain the production sewage in the sewage collection pit to the waste water collection tank of the demineralized water production system.

[0007] Step 2: Use at least one drain pump provided in the waste water collection tank of the demineralized water production system to drain the sewage in the pump pit of the circulating water system and the waste water of the demineralized water production system collected in the waste water collection tank of the demineralized water production system into the drum filter level gauge sleeve for flushing.

[0008] In a specific embodiment of the present application, the above step 1 includes:

[0009] Step 1.1: Automatically control the start of the sewage drain pump corresponding to the sewage collection pit in the pump pit of the circulating water system according to the liquid level set value, and drain the production sewage in the sewage collection pit to the waste water collection tank of the demineralized water production system.

[0010] In a specific embodiment of the present application, the above step 2 includes step 2.1 and step 2.2:

[0011] Step 2.1: Automatically trigger the start and stop of at least one drain pump according to the liquid level signal of the waste water collection tank of the demineralized water production system to continuously flush the drum filter level gauge sleeve.

[0012] In a specific embodiment of the present application, at least one drain pump provided in the waste water collection tank of the demineralized water production system includes a first drain pump and a second drain pump.

[0013] In a specific embodiment of the present application, a first liquid level set value and a second liquid level set value are successively provided on the waste water collection tank of the demineralized water production system from low to high. The normal liquid level of the waste water collection tank of the demineralized water production system is maintained in the liquid level range between the first liquid level set value and the second liquid level set value. The above step 2.1 includes step 2-1 and step 2-2.

[0014] Step 2-1: When the liquid level of the waste water collection tank of the demineralized water production system reaches the second liquid level set value, generate a second liquid level signal, and automatically start the first drain pump for drainage according to the second liquid level signal.

[0015] Step 2-2: When the liquid level of the waste water collection tank of the demineralized water production system reaches the first liquid level set value, generate a first liquid level signal, and stop the first drain pump according to the first liquid level signal.

[0016] In a specific embodiment of the present application, a first liquid level set value, a second liquid level set value, and a third liquid level set value are successively provided on the waste water collection tank of the demineralized water production system from low to high. After the above step 2-2, the method for flushing the drum filter level gauge of the nuclear power plant further includes:

[0017] Step 2-3: When the first drain pump is started and the liquid level of the waste water collection tank of the demineralized water production system continues to rise to the third liquid level set value, generate a third liquid level signal, and then automatically start the second drain pump for drainage according to the third liquid level signal.

[0018] Step 2-4: When the liquid level in the waste water collection tank of the demineralized water production system reaches the first liquid level set value, a first liquid level signal is generated, and the second drainage pump is stopped according to the first liquid level signal.

[0019] Step 2.2: When the seawater tide level starts to rise, at least one drainage pump is automatically triggered to start according to the seawater high tide level signal, and continuous flushing of the drum filter level gauge sleeve is carried out.

[0020] In a specific embodiment of the present application, a minimum liquid level set value is provided on the waste water collection tank of the demineralized water production system. When the liquid level in the waste water collection tank of the demineralized water production system drops to the minimum liquid level set value, a minimum liquid level signal is generated, and at least one drainage pump is automatically triggered to stop operating to avoid pump cavitation.

[0021] In a specific embodiment of the present application, at least one drainage pump includes a first drainage pump and a second drainage pump. The drainage rate of the first drainage pump is 20 m³ / h. The drainage rate of the second drainage pump is 70 m³ / h.

[0022] In a specific embodiment of the present application, the sewage collection pits in the pump pit of the circulating water system include a No. 1 sewage collection pit, a No. 2 sewage collection pit, a No. 3 sewage collection pit, and a No. 4 sewage collection pit. The sewage drainage pump corresponding to the No. 1 sewage collection pit is the No. 1 sewage drainage pump, and the No. 1 sewage drainage pump is used to drain the sewage collected in the No. 1 sewage collection pit into the waste water collection tank of the demineralized water production system. The sewage drainage pump corresponding to the No. 2 sewage collection pit is the No. 2 sewage drainage pump. The No. 2 sewage drainage pump is used to drain the sewage collected in the No. 2 sewage collection pit into the waste water collection tank of the demineralized water production system. The sewage drainage pump corresponding to the No. 3 sewage collection pit is the No. 3 sewage drainage pump. The No. 3 sewage drainage pump is used to drain the sewage collected in the No. 3 sewage collection pit into the waste water collection tank of the demineralized water production system. The sewage drainage pump corresponding to the No. 4 sewage collection pit is the No. 4 sewage drainage pump. The No. 4 sewage drainage pump is used to drain the sewage collected in the No. 4 sewage collection pit into the waste water collection tank of the demineralized water production system.

[0023] The second aspect of the present application provides a computer device, which includes a processor and a memory. The processor is used to execute a method for flushing a drum filter level gauge in a nuclear power plant according to the first aspect of the present application. The memory is used to store the executable instructions of the processor.

[0024] The third aspect of the present application provides a computer-readable storage medium, on which executable instructions of a computer are stored. When the executable instructions are executed by a processor, a method for flushing a drum filter level gauge in a nuclear power plant according to the first aspect of the present application is implemented.

[0025] The fourth aspect of the present application provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements a nuclear power plant drum filter level gauge flushing method according to the first aspect of the present application.

[0026] The beneficial effect of the technical solution of the present application is that: by utilizing the wastewater collection pool of the desalted water production system to receive the sewage in the pump pit of the circulating water system and the sewage in the collection pit, the production sewage of the nuclear power plant is fully utilized, and the drum filter level gauge sleeve can be flushed with the recyclable production sewage, thereby avoiding the direct discharge and waste of production sewage from the nuclear power plant, and there is no need to lead a flushing water from the production water system to flush the drum filter level gauge sleeve, thereby restoring the initial design operation mode of the production water system, ensuring the normal supply pressure of the production water system to the designed users, and achieving the purpose of reducing costs and increasing efficiency. For example, 730,000 yuan can be saved a year. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Shown is a real picture of a drum filter level gauge sleeve provided in one embodiment of the present application.

[0028] Figure 2 Shown is the flushing flow chart of the drum filter level gauge before optimization.

[0029] Figure 3 Shown is the drainage flow chart of the sewage collection pit before optimization.

[0030] Figure 4 Shown is a flow chart of a method for flushing a drum filter level gauge in a nuclear power plant provided by one embodiment of the present application.

[0031] Figure 5 Shown is a schematic diagram of the drainage process corresponding to a method for flushing a drum filter level gauge in a nuclear power plant provided in one embodiment of the present application.

[0032] Figure 6 Shown is a start-stop logic diagram of a drainage pump in a wastewater collection tank of a desalted water production system provided by an embodiment of the present application.

[0033] Figure 7 Shown is a start-stop sequence diagram of a drainage pump in a wastewater collection tank of a desalted water production system provided by one embodiment of the present application.

[0034] In the figure, 1. Demineralized water production system waste water collection tank; 2. First drainage pump; 3. Second drainage pump; 4. No. 1 sewage collection sump pit; 5. No. 2 sewage collection sump pit; 6. No. 3 sewage collection sump pit; 7. No. 4 sewage collection sump pit; 8. No. 1 sewage drainage pump; 9. No. 2 sewage drainage pump; 10. No. 3 sewage drainage pump; 11. No. 4 sewage drainage pump; 100. Drum filter level gauge sleeve; a. Demineralized water production system waste water; b. Shaft seal leakage water and bearing cooling drainage of the circulating water system pump; c. Power plant rainwater well. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0036] At least one embodiment of the present application provides a method for flushing a drum filter level gauge of a nuclear power plant. The execution subject of the method for flushing the drum filter level gauge of the nuclear power plant can be a processor, a server, etc., or can be manually controlled. Refer to Figure 4 , the method for flushing the drum filter level gauge of the nuclear power plant includes the following steps 1 and 2.

[0037] Step 1: Use the sewage drainage pump corresponding to the sewage collection sump pit in the pump pit of the circulating water system to drain the production sewage in the sewage collection sump pit to the demineralized water production system waste water collection tank 1.

[0038] After careful research, it is found that, refer to Figure 3 , the water inflow of the sewage collection sump pit in the pump pit of the circulating water system is stable. The 4 sewage collection sump pits (i.e., No. 1 sewage collection sump pit 4, No. 2 sewage collection sump pit 5, No. 3 sewage collection sump pit 6, and No. 4 sewage collection sump pit 7) collect the shaft seal leakage water and bearing cooling drainage b of the circulating water system pump, and the water volume is about 7 m³ / h. The 4 sewage collection sump pits automatically control the start of the drainage pump according to the liquid level setting value and drain the water to the power plant rainwater well c. Based on the above analysis, in the embodiment of the present application, by changing the sewage drainage path of the sewage collection sump pit, refer to Figure 5 , the sewage in the sewage collection sump pit is introduced into the demineralized water production system waste water collection tank 1.

[0039] Step 2: Use at least one drainage pump provided in the demineralized water production system waste water collection tank 1 to drain the sewage in the sewage collection sump pit in the pump pit of the circulating water system and the demineralized water production system waste water collected in the demineralized water production system waste water collection tank 1 into the drum filter level gauge sleeve 100 for flushing.

[0040] According to the technical solution provided by the embodiment of the present application, by using the waste water collection tank 1 of the demineralized water production system to receive the sewage in the sewage collection sump in the pump pit of the circulating water system, the production sewage of the nuclear power plant is fully utilized, and the production sewage can be recycled to wash the drum screen level gauge sleeve 100, avoiding the direct discharge and waste of the production sewage of the nuclear power plant. There is no need to introduce a path of flushing water from the production water system to wash the drum screen level gauge sleeve 100, restoring the initial design operation mode of the production water system, ensuring the normal supply pressure of the production water system to the designed users, and achieving the purpose of cost reduction and efficiency increase. For example, 730,000 yuan can be saved annually.

[0041] In at least one embodiment of the present application, step 1 includes step 1.1.

[0042] Step 1.1: Automatically control the start of the sewage drainage pump corresponding to the sewage collection sump in the pump pit of the circulating water system according to the liquid level set value, so as to discharge the production sewage in the sewage collection sump to the waste water collection tank 1 of the demineralized water production system.

[0043] In the above embodiment of the present application, by automatically controlling the start of the sewage drainage pump corresponding to the sewage collection sump in the pump pit of the circulating water system according to the liquid level set value, automatic processing is realized, and the sewage overflow in the sewage collection sump is avoided.

[0044] In at least one embodiment of the present application, step 2 includes step 2.1 and step 2.2.

[0045] In the above embodiment of the present application, at least one drainage pump includes a first drainage pump 2 and a second drainage pump 3.

[0046] Step 2.1: Automatically trigger the start and stop of at least one drainage pump according to the liquid level signal of the waste water collection tank 100 of the demineralized water production system, and continuously wash the drum screen level gauge sleeve 100.

[0047] In the above embodiment of the present application, a first liquid level set value H1 and a second liquid level set value H2 are successively provided on the waste water collection tank 1 of the demineralized water production system from low to high. The normal liquid level of the waste water collection tank 1 of the demineralized water production system is maintained in the liquid level range between the first liquid level set value H1 and the second liquid level set value H2. Refer to Figure 6 and Figure 7 , step 2.1 includes the following steps 2-1 and 2-2.

[0048] Step 2-1: When the liquid level of the waste water collection tank 1 of the demineralized water production system reaches the second liquid level set value H2, generate a second liquid level signal, and automatically start the first drainage pump 2 for drainage according to the second liquid level signal.

[0049] Step 2-2: When the liquid level of the waste water collection tank 1 of the demineralized water production system reaches the first liquid level set value H1, a first liquid level signal is generated, and the first drain pump 2 is stopped according to the first liquid level signal.

[0050] In the above embodiments of the present application, the first liquid level set value H1, the second liquid level set value H2, and the third liquid level set value H3 are successively provided on the waste water collection tank 1 of the demineralized water production system from low to high. After the above step 2-2, referring to Figure 6 and Figure 7 , step 2.1 further includes the following steps 2-3 and 2-4.

[0051] Step 2-3: When the first drain pump 2 starts and the liquid level of the waste water collection tank 1 of the demineralized water production system continues to rise to the third liquid level set value H3, a third liquid level signal is generated, and then the second drain pump 3 is automatically started for drainage according to the third liquid level signal.

[0052] Step 2-4: When the liquid level of the waste water collection tank 1 of the demineralized water production system reaches the first liquid level set value H1, a first liquid level signal is generated, and the second drain pump 3 is stopped according to the first liquid level signal.

[0053] For example, in the operation mode at low tide of the sea water, the waste water collection tank 1 of the demineralized water production system continuously receives the drainage from 4 sewage collection sumps at a rate of 7 m³ / h. When the liquid level reaches H2, the first drain pump 2 of the waste water collection tank 1 of the demineralized water production system is started for drainage. When the liquid level drops to H1, the first drain pump 2 of the waste water collection tank 1 of the demineralized water production system is stopped. If the demineralized water production system is started at this time, the waste water of the demineralized water production system is discharged into the waste water collection tank 1 of the brine production system, and the liquid level continues to rise to H3. The second drain pump 3 of the waste water collection tank 1 of the demineralized water production system is started for drainage. When the liquid level drops to H1, the first drain pump 2 and the second drain pump 3 of the waste water collection tank 1 of the demineralized water production system are stopped.

[0054] Step 2.2: When the sea water tide level starts to rise, at least one drain pump is automatically triggered to start according to the sea water high tide level signal for continuous flushing of the drum screen level gauge sleeve 100.

[0055] Specifically, the power plant is equipped with a real-time monitoring system for the sea water tide level. The real-time monitoring system for the sea water tide level monitors the sea water tide level in real time. If the real-time monitoring system for the sea water tide level monitors that the sea water tide level starts to rise, a sea water high tide level signal will be generated, and the sea water high tide level signal automatically triggers at least one drain pump to start, so as to realize the continuous flushing of the drum screen level gauge sleeve 100.

[0056] In the above embodiments of the present application, by adding the interlock start pump logic of the drain pump of the waste water collection tank 1 of the demineralized water production system and the sea water tide level, the continuous flushing of the drum screen level gauge sleeve 100 at the high tide level of the sea water is ensured.

[0057] In the above embodiments of the present application, at least one drain pump includes a first drain pump 2 and a second drain pump 3. The first drain pump 2 is automatically triggered to start according to the seawater high tide level signal, and the logic of automatically stopping the first drain pump 2 at the first liquid level set value H1 of the waste water collection tank 1 of the demineralized water production system is locked.

[0058] For example, in the operating mode at the seawater high tide level, the seawater high tide level signal locks the logic of automatically stopping the first drain pump 2 at the first liquid level set value H1, and starts the first drain pump 2 of the waste water collection tank 1 of the demineralized water production system to continuously flush the drum screen level gauge sleeve 100. After the seawater high tide level signal disappears, the first liquid level set value H1 triggers the first drain pump 2 of the waste water collection tank 1 of the demineralized water production system to stop operating. If the demineralized water production system is started at this time, the waste water of the demineralized water production system is discharged into the waste water collection tank 1 of the brine production system, and the liquid level continues to rise to H3. The second drain pump 3 of the waste water collection tank 1 of the demineralized water production system is started for drainage. When the liquid level drops to H1, the second drain pump 3 of the waste water collection tank 1 of the demineralized water production system stops operating. After the seawater high tide level signal disappears, the first liquid level set value H1 triggers the first drain pump 2 of the waste water collection tank 1 of the demineralized water production system to stop operating.

[0059] In at least one embodiment of the present application, a minimum liquid level set value L is provided on the waste water collection tank 1 of the demineralized water production system. When the liquid level of the waste water collection tank 1 of the demineralized water production system drops to the minimum liquid level set value L, a minimum liquid level signal is generated, and at least one drain pump is automatically triggered to stop operating to avoid pump cavitation.

[0060] For example, at least one drain pump includes a first drain pump 2 and a second drain pump 3. Whether it is the start of the first drain pump 2 of the waste water collection tank 1 of the demineralized water production system triggered by the second liquid level signal (or, liquid level H2 signal) of the waste water collection tank 1 of the demineralized water production system or the seawater high tide level signal, or the start of the second drain pump 3 of the waste water collection tank 1 of the demineralized water production system triggered by the third liquid level signal (or, liquid level H3 signal) of the waste water collection tank 1 of the demineralized water production system, as long as the liquid level of the waste water collection tank 1 of the demineralized water production system drops to L, the first drain pump 2 and the second drain pump 3 are simultaneously triggered to stop operating according to the minimum liquid level signal to avoid pump cavitation damage.

[0061] In the above embodiments of the present application, within the liquid level range of L to H1, the waste water collection tank 1 of the demineralized water production system stores a preset amount of water, ensuring that a continuous flushing water volume for a preset duration is provided for flushing the sleeve 100 of the drum screen level gauge at high tide. For example, if it takes about 4 hours from the start of the rising tide of seawater to the highest tide level, the preset water volume can be set to about 80 m³, and the preset duration can be set to about 4 hours. In this way, a continuous flushing water volume of about 4 hours can be provided for flushing the sleeve 100 of the drum screen level gauge. The normal liquid level of the waste water collection tank 1 of the demineralized water production system is maintained in the liquid level range of H1 to H2.

[0062] According to the original design, there are only 2 liquid level control set values (i.e., the lowest liquid level set value L and the first liquid level set value H1) in the liquid level control logic of the waste water collection tank 1 of the demineralized water production system. The drainage rates of the first drainage pump 2 and the second drainage pump 3 of the waste water collection tank 1 of the demineralized water production system are both 70 m³ / h. After the liquid level reaches H1, the first drainage pump 2 starts. If the first drainage pump 2 fails to start, the second drainage pump 3 starts. After draining the liquid level to L, the drainage pump stops operating. When the liquid level reaches H1 again next time, the drainage pump starts again to drain the liquid level to L. In this way, a continuous flushing effect on the sleeve 100 of the drum screen level gauge cannot be formed at high tide of seawater.

[0063] In at least one embodiment of the present application, 2 liquid level control set values (i.e., the second liquid level set value H2 and the third liquid level set value H3) are added to the liquid level control logic of the waste water collection tank 1 of the demineralized water production system. After the addition, there are a total of 4 liquid level set values in the waste water collection tank 1 of the demineralized water production system (i.e., the lowest liquid level set value L, the first liquid level set value H1, the second liquid level set value H2, and the third liquid level set value H3). Through the liquid level control logic methods of the above steps 2-1 and 2-3, while flushing the sleeve 100 of the drum screen level gauge, it is possible to effectively avoid the overflow of the waste water collection tank 1 of the demineralized water production system. Through the liquid level control logic methods of the above steps 2-2 and 2-4, it can be ensured that the normal liquid level of the waste water collection tank 1 of the demineralized water production system is maintained in the liquid level range of H1 to H2, and the waste water collection tank 1 of the demineralized water production system stores a preset amount of water, ensuring that a continuous flushing water volume for a preset duration is provided for flushing the sleeve 100 of the drum screen level gauge at high tide.

[0064] In at least one embodiment of the present application, at least one drainage pump includes the first drainage pump 2 and the second drainage pump 3. The drainage rate of the first drainage pump 2 is 20 m³ / h. The drainage rate of the second drainage pump 3 is 70 m³ / h.

[0065] After step 1, the waste water collection tank 1 of the demineralized water production system has a stable water source. In the embodiment of the present application, to ensure that there is sufficient continuous flushing flow from the waste water collection tank 1 of the demineralized water production system to the drum strainer level gauge sleeve 100 during high tide, the drainage rate of the waste water collection tank 1 of the demineralized water production system is designed to be approximately 20 m³ / h. Correspondingly, the first drainage pump 2 is replaced, and the drainage rate of the replaced first drainage pump 2 is 20 m³ / h. The flow rate of the second drainage pump 3 still maintains the initial designed drainage rate of 70 m³ / h to ensure sufficient drainage flow and avoid overflow of the waste water collection tank 1 of the demineralized water production system when the demineralized water production system starts up.

[0066] After optimization, two liquid level control set values are added to the liquid level control logic of the waste water collection tank 1 of the demineralized water production system, and the first drainage pump 2 is replaced. In the embodiment of the present application, it can not only ensure continuous flushing of the drum strainer level gauge sleeve 100 during high tide, avoid blockage of the drum strainer level gauge sleeve 100, but also eliminate the need for a separate flushing water line from the production water system to continuously flush the drum strainer level gauge sleeve 100.

[0067] In at least one embodiment of the present application, the sewage collection pits in the pump pit of the circulating water system include a first sewage collection pit 4, a second sewage collection pit 5, a third sewage collection pit 6, and a fourth sewage collection pit 7. The sewage drainage pump corresponding to the first sewage collection pit 4 is the first sewage drainage pump 8, and the first sewage drainage pump 8 is used to drain the sewage collected in the first sewage collection pit 4 into the waste water collection tank 1 of the demineralized water production system. The sewage drainage pump corresponding to the second sewage collection pit 5 is the second sewage drainage pump 9. The second sewage drainage pump 9 is used to drain the sewage collected in the second sewage collection pit 5 into the waste water collection tank 1 of the demineralized water production system. The sewage drainage pump corresponding to the third sewage collection pit 6 is the third sewage drainage pump 10. The third sewage drainage pump 10 is used to drain the sewage collected in the third sewage collection pit 6 into the waste water collection tank 1 of the demineralized water production system. The sewage drainage pump corresponding to the fourth sewage collection pit 7 is the fourth sewage drainage pump 11. The fourth sewage drainage pump 11 is used to drain the sewage collected in the fourth sewage collection pit 7 into the waste water collection tank 1 of the demineralized water production system.

[0068] At least one embodiment of the present application also provides a computer device, which includes a processor and a memory. The processor is used to execute a method for flushing a drum strainer level gauge of a nuclear power plant provided in any one of the above embodiments of the present application. The memory is used to store executable instructions of the processor, such as application programs. The number of processors can be one or more. The application programs stored in the memory can include one or more modules corresponding to each set of instructions. In addition, the processor is configured to execute instructions to perform the above method for flushing a drum strainer level gauge of a nuclear power plant.

[0069] The computer device may further include a power supply component configured for power management of the computer device, a wired or wireless network interface configured to connect the computer device to a network, and an input / output (I / O) interface. The computer device may operate based on an operating system stored in the memory, such as Windows Server TM , Mac OSX TM , Unix TM , Linux TM , FreeBSD TM or the like.

[0070] At least one embodiment of the present application further provides a computer-readable storage medium, on which computer-executable instructions are stored. When the executable instructions are executed by a processor, a method for flushing the level gauge of the drum filter in a nuclear power plant provided in any one of the above embodiments of the present application is implemented.

[0071] A non-transitory computer-readable storage medium, when the instructions in the storage medium are executed by the processor of the above computer device, enables the above computer device to execute the method for flushing the level gauge of the drum filter in a nuclear power plant. The method for flushing the level gauge of the drum filter in a nuclear power plant is executed by an agent program.

[0072] Those of ordinary skill in the art can realize that the algorithm steps of each example described in combination with the embodiments disclosed in the present application can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0073] At least one embodiment of the present application further provides a computer program product, including a computer program / instructions, when the computer program / instructions are executed by a processor, a method for flushing the level gauge of the drum filter in a nuclear power plant provided in any one of the above embodiments of the present application is implemented.

[0074] When the above functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a computer program product. This computer program product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of a method for flushing the drum strainer liquid level gauge of a nuclear power plant in various embodiments of the present application. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs that can store program verification codes.

[0075] It should be noted that the combination manner of each technical feature in the embodiments of the present application is not limited to the combination manner recorded in the embodiments of the present application or the combination manner recorded in the specific embodiments. All the technical features recorded in the present application can be freely combined or combined in any way, unless contradictions occur between them.

[0076] As shown in the present application and the claims, unless the context clearly indicates an exceptional situation, words such as "a", "an", and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the term "comprising" only indicates the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0077] Terms such as "first", "second", "No. 1", "No. 2", and other similar words are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "No. 1", "No. 2" may explicitly or implicitly include one or more of such features.

[0078] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application.

Claims

1. A method for flushing the liquid level gauge of a drum strainer in a nuclear power plant, characterized in that, Including: Step 1: Use the sewage drainage pump corresponding to the sewage collection sump in the pump pit of the circulating water system to drain the production sewage in the sewage collection sump to the waste water collection tank of the demineralized water production system; Step 2: Use at least one drainage pump provided in the waste water collection tank of the demineralized water production system to drain the sewage in the sewage collection sump in the pump pit of the circulating water system and the waste water of the demineralized water production system collected in the waste water collection tank of the demineralized water production system into the drum screen level gauge sleeve for flushing; Step 2 includes: Step 2.1: Automatically trigger the start and stop of at least one drainage pump according to the liquid level signal of the waste water collection tank of the demineralized water production system to perform continuous flushing of the drum screen level gauge sleeve; Step 2.2: When the sea water tide level starts to rise, automatically trigger the start of at least one drainage pump according to the high sea water level signal to perform continuous flushing of the drum screen level gauge sleeve; At least one drainage pump provided in the waste water collection tank of the demineralized water production system includes a first drainage pump and a second drainage pump. The waste water collection tank of the demineralized water production system is successively provided with a minimum liquid level set value, a first liquid level set value, and a second liquid level set value from low to high. The normal liquid level of the waste water collection tank of the demineralized water production system is maintained in the liquid level range between the first liquid level set value and the second liquid level set value. Among them, Step 2.1 includes: Step 2-1: When the liquid level of the waste water collection tank of the demineralized water production system reaches the second liquid level set value, generate a second liquid level signal, and automatically start the first drainage pump for drainage according to the second liquid level signal; Step 2-2: When the liquid level of the waste water collection tank of the demineralized water production system reaches the first liquid level set value, generate a first liquid level signal, and stop the first drainage pump according to the first liquid level signal; If the waste water collection tank of the demineralized water production system is successively provided with a minimum liquid level set value, a first liquid level set value, a second liquid level set value, and a third liquid level set value from low to high, then after Step 2-2, the described method for flushing the drum screen level gauge of a nuclear power plant further includes: Step 2-3: When the first drainage pump starts and the liquid level of the waste water collection tank of the demineralized water production system continues to rise to the third liquid level set value, generate a third liquid level signal, and then automatically start the second drainage pump for drainage according to the third liquid level signal; Step 2-4: When the liquid level of the waste water collection tank of the demineralized water production system reaches the first liquid level set value, generate a first liquid level signal, and stop the second drainage pump according to the first liquid level signal.

2. The flushing method of the drum strainer liquid level gauge in a nuclear power plant according to claim 1, wherein Step 1 includes: Step 1.1: Automatically control the start of the sewage drainage pump corresponding to the sewage collection sump in the pump pit of the circulating water system according to the liquid level set value to drain the production sewage in the sewage collection sump to the waste water collection tank of the demineralized water production system.

3. A method for flushing the liquid level gauge of the drum filter in a nuclear power plant according to claim 1, characterized in that Step 2.2 includes: The high sea water level signal automatically triggers the start of at least one drainage pump to perform continuous flushing of the drum screen level gauge sleeve, and locks the logic of automatically stopping the first drainage pump at the first liquid level set value of the waste water collection tank of the demineralized water production system.

4. A method for flushing the liquid level gauge of a drum strainer in a nuclear power plant according to any one of claims 1 to 3, characterized in that, The drainage rate of the first drainage pump is 20 m³ / h, and the drainage rate of the second drainage pump is 70 m³ / h.

5. A method for flushing the liquid level gauge of a drum strainer in a nuclear power plant according to any one of claims 1 to 3, characterized in that, The waste water collection tank of the demineralized water production system is provided with a minimum liquid level set value. When the liquid level of the waste water collection tank of the demineralized water production system drops to the minimum liquid level set value, generate a minimum liquid level signal, and automatically trigger the stop of at least one drainage pump according to the minimum liquid level signal.

6. A computer device, characterized in that, Comprising: a processor for executing a method for flushing a drum strainer liquid level gauge in a nuclear power plant according to any one of claims 1 to 5; and a memory for storing executable instructions of the processor.

7. A computer-readable storage medium having computer-executable instructions stored thereon, characterized in that, When the executable instructions are executed by the processor, a method for flushing a drum strainer liquid level gauge in a nuclear power plant according to any one of claims 1 to 5 is implemented.

8. A computer program product, comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, a method for flushing a drum strainer liquid level gauge in a nuclear power plant according to any one of claims 1 to 5 is implemented.

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