A chemical water production system for a thermal power plant and a one-button start-stop control method

Abstract

The present invention belongs to the field of chemical water production and discloses a chemical water production system for a thermal power plant and a one-button start-stop control method. The system includes an ultrafiltration water treatment system, a reverse osmosis water treatment system, a mixed bed water treatment system, and a one-button start-stop control system. The ultrafiltration water treatment system includes an industrial water tank, an ultrafiltration feed water pump, a raw water heater, a dual-media filter, a disc filter, an ultrafiltration device, and a clean water tank, which are connected in sequence. The reverse osmosis water treatment system includes a clean water pump, a safety filter, a reverse osmosis high-pressure pump, a reverse osmosis device, and a fresh water tank, which are connected in sequence. The reverse osmosis water treatment system includes a fresh water pump, a cationic bed, a decarbonizer, an intermediate water tank, an intermediate water pump, an anionic bed, a mixed bed, and a desalted water tank, which are connected in sequence. The one-button start-stop control system is electrically connected to each system and is used to monitor, control, and collect operating status parameters of each system. The present invention can achieve one-button start and stop, reduce water and electricity resource waste, improve water production efficiency, and reduce labor intensity.

Description

Technical Field

[0001] The present invention belongs to the field of chemical water production, and in particular relates to a chemical water production system for a thermal power plant and a one-button start-stop control method. Background Art

[0002] Thermal power plants consume a large amount of process water during operation. The existing process water preparation involves many independent and dispersed systems, which have at least the following problems:

[0003] (1) Multiple operators are required to monitor the panel or perform manual adjustments. Each system needs to monitor the corresponding water treatment index when it is started separately. The next operation can only be carried out after the water treatment index is qualified. There are cases of forgetfulness or misoperation during operation, which leads to waste of water resources and increase of electricity consumption rate of thermal power plants.

[0004] (2) Each system is manually operated one by one during operation. It takes nearly 1.5 hours to start the water production system once. Any operational error in any link will lead to the interruption of the water production process. There are disadvantages such as large amount of personnel monitoring and operation, difficult management, low water production efficiency and easy damage of equipment.

[0005] Based on this, how to provide a chemical water production system and a one-button start-stop control method for a thermal power plant to achieve automatic control of various systems and operating links, thereby improving water production efficiency is a technical problem that technical personnel in this field currently need to solve.

[0006] In the prior art, patent document CN216946527U discloses a chemical water production system, comprising an ultrafiltration water treatment system, a reverse osmosis water treatment system, a mixed bed water treatment system, and a PLC controller connected in sequence. The PLC controller is electrically connected to the ultrafiltration water treatment system, the reverse osmosis water treatment system, and the mixed bed water treatment system, respectively, and is used to monitor and collect the operating status parameters of the ultrafiltration water treatment system, the reverse osmosis water treatment system, and the mixed bed water treatment system. This patent can achieve one-button start and stop control of each link, thereby improving water production efficiency. However, the water production quality and water production efficiency of the entire chemical water production system in the technical solution of this patent need to be further improved, and its one-button start and stop control does not set a delay control time for the equipment related to the start and stop steps, which is not conducive to the smooth connection of the equipment in each step and easily causes waste of resources such as water and electricity. Summary of the Invention

[0007] The present invention aims to solve at least one technical problem existing in the background technology, and provides a chemical water production system for a thermal power plant and a one-button start-stop control method, so as to realize the one-button start and stop of each system, thereby reducing the waste of water resources and the increase in electricity consumption of the thermal power plant, improving water production efficiency, and reducing the labor intensity of staff.

[0008] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0009] A chemical water production system for a thermal power plant, comprising:

[0010] At least one ultrafiltration water treatment system for pre-treating the water source of the thermal power plant; the ultrafiltration water treatment system includes an industrial water tank, an ultrafiltration water pump, a raw water heater, a dual-media filter, a disc filter, an ultrafiltration device, and a clean water tank, which are connected in sequence. The water inlet pipe of the industrial water tank is connected to the water source of the thermal power plant;

[0011] At least one reverse osmosis water treatment system for treating the water produced by the ultrafiltration water treatment system; the reverse osmosis water treatment system comprises a clean water pump, a safety filter, a reverse osmosis high-pressure pump, a reverse osmosis device, and a fresh water tank connected in sequence; the water inlet of the clean water pump is connected to the clean water tank of the ultrafiltration water treatment system;

[0012] At least one mixed bed water treatment system for treating the water produced by the reverse osmosis water treatment system; the mixed bed water treatment system comprises a fresh water pump, a cation bed, a carbon remover, an intermediate water tank, an intermediate water pump, an anion bed, and a mixed bed connected in sequence; the fresh water pump is connected to the fresh water tank of the reverse osmosis water treatment system, and the water produced at the outlet of the mixed bed is connected to the desalted water tank and / or water use facilities;

[0013] A one-button start-stop control system is electrically connected to the ultrafiltration water treatment system, the reverse osmosis water treatment system and the mixed bed water treatment system, respectively, and is used to monitor, control and collect operating status parameters of the ultrafiltration water treatment system, the reverse osmosis water treatment system and the mixed bed water treatment system.

[0014] Furthermore, the ultrafiltration water treatment system comprises two sets connected in parallel;

[0015] The two sets of ultrafiltration water treatment systems include two industrial water tanks, four ultrafiltration water pumps, two raw water heaters, four dual-media filters, two disc filters, two ultrafiltration devices and two clean water tanks;

[0016] The water outlets of two industrial water tanks are connected in parallel and collected into a main pipe, which is then connected to the water inlets of four ultrafiltration water pumps respectively. The water outlets of the four ultrafiltration water pumps are connected in parallel and collected into a main pipe, which is then connected to the water inlets of two raw water heaters respectively. The water outlets of the two raw water heaters are connected in parallel and collected into a main pipe, which is then connected to the water inlets of four dual-media filters respectively. The water outlets of the four dual-media filters are connected in parallel and collected into a main pipe, which is then connected to the water inlets of two disc filters respectively. The water outlets of the two disc filters are connected in parallel and collected into a main pipe, which is then connected to the water inlets of two ultrafiltration devices respectively. The water outlets of the two ultrafiltration devices are connected in parallel and collected into a main pipe, which is then connected to the water inlets of two clean water tanks respectively.

[0017] Furthermore, the ultrafiltration water treatment system also includes a cleaning water tank, and the water outlets of the two ultrafiltration devices are connected in parallel and then converged into a main pipe to connect to the cleaning water tank; the cleaning water tank is returned to the two ultrafiltration devices respectively through a first return pipe, and two parallel ultrafiltration backwash water pumps are arranged on the first return pipe for backwashing the two ultrafiltration devices.

[0018] Furthermore, the reverse osmosis water treatment system is composed of two sets connected in parallel; each set of reverse osmosis water treatment system includes a clean water pump, a safety filter, a reverse osmosis high-pressure pump, a reverse osmosis device and a fresh water tank connected in sequence; the water inlet of the clean water pump is correspondingly connected to the water outlet of the clean water tank in the ultrafiltration water treatment system.

[0019] Furthermore, the reverse osmosis water treatment system also includes a cleaning water tank, and the water outlets of the two reverse osmosis devices are connected in parallel and then converged into a main pipe to connect to the cleaning water tank; the cleaning water tank is returned to the two reverse osmosis devices respectively through a second return pipe, and two parallel reverse osmosis cleaning water pumps are arranged on the second return pipe for cleaning the two reverse osmosis devices.

[0020] Furthermore, the mixed bed water treatment system is two sets connected in parallel; the two mixed bed water treatment systems include 4 fresh water pumps, 2 cationic beds, 1 decarbonizer, 1 intermediate water tank, 3 intermediate water pumps, 2 anionic beds, 2 mixed beds and 2 desalted water tanks;

[0021] The water outlets of the two fresh water tanks are connected in parallel and collected into a main pipe, which is then connected to the water inlets of the four fresh water pumps respectively. The water outlets of the four fresh water pumps are connected in parallel and collected into a main pipe, which is then connected to the water inlets of the two cationic beds respectively. The water outlets of the two cationic beds are connected in parallel and collected into a main pipe, which is then connected to the water inlet of the decarbonizer. A decarbonizing blower is provided on one side of the decarbonizer. The bottom water outlet of the decarbonizer is connected to the water inlet of the intermediate water tank. The water outlets of the intermediate water tank are respectively connected to the water inlets of the three intermediate water pumps. The water outlets of the three intermediate water pumps are connected in parallel and collected into a main pipe, which is then connected to the water inlets of the two anion beds respectively. The water outlet of each anion bed is respectively connected to the water inlet of a mixed bed, and the water outlet of the mixed bed is connected to the desalted water tank and / or water setting.

[0022] Furthermore, the dual-media filter is a cylindrical body with a water inlet at the upper end, an anthracite filter layer and a quartz sand filter layer arranged in sequence from top to bottom inside, and a water outlet at the bottom;

[0023] The anthracite filter layer has an anthracite particle size of 0.8-1.2 mm and a layer height of 400 mm;

[0024] The quartz sand filter layer includes a first quartz sand filter layer and a second quartz sand filter layer arranged in an upper and lower interval; the quartz sand particle size of the first quartz sand filter layer is 0.45-0.8mm and the layer height is 700mm; the quartz sand particle size of the second quartz sand filter layer is 0.8-1.2mm and the layer height is 700mm.

[0025] Furthermore, the screening aperture of the ultrafiltration device is 0.05-0.1um; 60 filter elements are installed in the security filter to intercept particles larger than 5um in water.

[0026] Furthermore, it also includes a desalination dosing system, which includes a coagulant dosing device, a bactericide dosing device, a scale inhibitor dosing device and a reducing agent dosing device; the coagulant dosing device and the bactericide dosing device are connected to the outlet main pipe of the ultrafiltration water pump; the scale inhibitor dosing device is connected to the inlet main pipe of the safety filter; and the reducing agent dosing device is connected to the outlet main pipe of the clean water pump.

[0027] At the same time, the present invention also provides a one-button start-stop control method for a chemical water production system in a thermal power plant, applying the system as described in any one of the above items, the method comprising:

[0028] S1: One-button start-up pre-operation of the chemical water system, including:

[0029] S101: Select the equipment to be put into operation;

[0030] S102: It is determined that the "emergency stop" button of the dual-media filter and the reverse osmosis device has not been pressed before entering the one-key start step of the ultrafiltration water treatment system;

[0031] S2: One-button start-up steps for the ultrafiltration water treatment system, including:

[0032] S201: Dual-media filter front washing and water production have been selected;

[0033] S202: The ultrafiltration device has been selected for water production and backwashing;

[0034] S203: The ultrafiltration device has been selected for positive washing;

[0035] S204: The ultrafiltration device has been selected to produce water, the water production time is set, and the water production sequence is started, completing the one-button start of the first ultrafiltration water treatment system;

[0036] S3: One-button start-up steps for the reverse osmosis water treatment system, specifically including:

[0037] S301: Low-pressure flushing of the reverse osmosis device has been selected;

[0038] S302: Freshwater discharge from the reverse osmosis unit has been selected;

[0039] S303: Reverse osmosis device has been selected to produce water;

[0040] S304: The reverse osmosis unit has been selected for shutdown and flushing;

[0041] S305: After the shutdown and flushing is completed, the reverse osmosis flushing water pump, flushing water inlet valve, concentrated water drain valve and unqualified water drain valve are closed in sequence, completing the one-button start of the selected reverse osmosis water treatment system;

[0042] S4: One-button startup steps for the mixed bed water treatment system, specifically including:

[0043] S401: One-button start pre-operation of the mixed bed water treatment system, including:

[0044] S4011: Select the cation bed, anion bed and mixed bed to be put into operation;

[0045] S4012: Determine that the selected fresh water tank level is greater than 2 meters, and allow startup;

[0046] S402: mixed bed water treatment system startup step, sequentially starting the fresh water pump, the selected cation bed, the carbon removal fan, the intermediate water pump, the selected anion bed, and the selected mixed bed;

[0047] S5: One-click shutdown steps for the chemical water production system, including:

[0048] S501: Click the “Stop” button;

[0049] S502: backwashing of ultrafiltration water treatment system;

[0050] The backwashing of the ultrafiltration water treatment system includes drainage, upper backwashing and lower backwashing steps;

[0051] After the backwash of the current ultrafiltration device is completed, a delay of t is applied and the next ultrafiltration device is shut down using the same steps;

[0052] S503: The reverse osmosis water treatment system starts to shut down when the backwash of the corresponding ultrafiltration device is completed, specifically including:

[0053] Open the flushing water inlet pneumatic valve, open the unqualified drainage pneumatic valve and the concentrated water drainage pneumatic valve at the same time, set the flushing time, and start the reverse osmosis flushing water pump; when the flushing time is over, stop the reverse osmosis flushing water pump, and close the flushing water inlet pneumatic valve, the unqualified drainage pneumatic valve, and the concentrated water drainage pneumatic valve;

[0054] After the current reverse osmosis device is shut down for a delay of t, the next reverse osmosis device is shut down using the same steps;

[0055] S504: The mixed bed water treatment system is shut down, and the fresh water pump, selected cation bed, decarbonization fan, intermediate water pump, selected anion bed, and selected mixed bed are shut down in sequence.

[0056] Furthermore, when two ultrafiltration water treatment systems are in operation, the one-key start step of the ultrafiltration water treatment system in step S2 further includes:

[0057] S205: After the first ultrafiltration water treatment system produces water, a delay of t is applied, and the second ultrafiltration water treatment system is automatically selected and put into operation. The operation steps are the same as S201-S204.

[0058] Furthermore, when two reverse osmosis water treatment systems are in operation, the one-key start step of the reverse osmosis water treatment system in step S3 further includes:

[0059] S306: After the first reverse osmosis water treatment system produces water, a delay of t is applied, and the next reverse osmosis water treatment system is automatically selected for operation. The operation steps are the same as S301-S30.

[0060] Furthermore, it also includes an early warning system. During the one-button startup process of the chemical water production system, if the water production indicators of the ultrafiltration device or reverse osmosis device are abnormal, and the selected cation bed Na+ concentration is >50ug / L, the anion bed DD is >5us / cm, or the mixed bed DD is >0.2us / cm, the early warning system will issue a photon alarm and voice prompt to prompt the operator to manually judge whether to shut down the equipment based on the accuracy of the data.

[0061] Compared with the prior art, the present invention has the following beneficial effects:

[0062] (1) The chemical water production system for a thermal power plant provided by the present invention adopts a one-button start-stop control method to replace manual operation one by one, realizing one-button start-stop automatic operation and monitoring of each subsystem, which can avoid the waste of water resources and the increase of power consumption rate of the thermal power plant caused by operation delay or forgetfulness; at the same time, it can reduce the number of personnel operations, reduce labor intensity, increase the service life of equipment during long-term operation, improve production efficiency, and achieve the purpose of reducing staff and increasing efficiency;

[0063] (2) The chemical water production system for a thermal power plant provided by the present invention adopts a mixed connection method of two ultrafiltration water treatment systems, two reverse osmosis water treatment systems, and two mixed bed water treatment systems. The ultrafiltration water pump, fresh water pump and other rotating wearing parts are arranged in parallel (number>2), and the parallel components are then connected in series. The two systems can be used interchangeably or operate independently, one for use and one for backup, which can effectively avoid the shutdown of the entire system caused by the failure of a single component, ensure normal production operation, improve operating efficiency, and facilitate one-button start and stop control operation;

[0064] (3) The ultrafiltration water treatment system of the chemical water production system of a thermal power plant provided by the present invention ensures the temperature of the water treatment process by a raw water heater, and is filtered in sequence by a dual-media filter-disc filter-ultrafiltration device, which together ensure the filtration accuracy of the ultrafiltration water treatment system and the water production quality of the entire system; specifically, the present invention heats the raw water by setting a raw water heater so that it can meet the requirements of subsequent process equipment treatment, thereby improving water production efficiency and water production quality; at the same time, a dual-media filter and a disc filter are provided in the ultrafiltration water treatment system, and the dual-media filter The raw water is filtered using a double quartz sand filter layer and anthracite filter layer, using the reverse particle size filtration principle. Coagulants and fungicides are added to the water inlet main pipe (and added at the ultrafiltration water pump outlet main pipe). This can effectively remove suspended matter, grease, colloids and other impurities in the raw water. The water outlet of the dual-media filter enters the disc filter, which has a filtration accuracy of 100μm and can intercept larger particles in the water. The water outlet of the disc filter enters the ultrafiltration device, which filters out impurities such as colloids, proteins, microorganisms and large molecular organic matter in the water.

[0065] (4) The one-button start-stop control method of the present invention optimizes the start-stop steps and delay time of each system, so that the equipment of each step can be smoothly connected, saving water, electricity and other resources; at the same time, an early warning system is set. During the one-button start-up process of the chemical water production system, if the water production index of the ultrafiltration device or the reverse osmosis device is abnormal, the cationic bed Na + When the concentration is greater than 50ug / L, the anion bed DD is greater than 5us / cm, or the mixed bed DD is greater than 0.2us / cm, the early warning system will issue a photon alarm and voice prompt, prompting the operator to manually judge whether to shut down the equipment based on the accuracy of the data. This is conducive to timely troubleshooting of equipment failures, ensuring the normal operation of the chemical water production system in the thermal power plant, and improving water production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 This is a schematic diagram of the overall structure of a chemical water production system for a thermal power plant according to an embodiment of the present invention;

[0067] Figure 2 Schematic diagram of the structure of an ultrafiltration water treatment system according to an embodiment of the present invention;

[0068] Figure 3 Schematic diagram of the structure of a reverse osmosis water treatment system according to an embodiment of the present invention;

[0069] Figure 4 Schematic diagram of the structure of a mixed bed water treatment system according to an embodiment of the present invention;

[0070] Explanation of the marks in the figure: 1-Ultrafiltration water treatment system; 2-Reverse osmosis water treatment system; 3-Mixed bed water treatment system; 4-Washing water tank;

[0071] 101 - Industrial water tank; 102 - Ultrafiltration feed water pump; 103 - Raw water heater; 104 - Dual-media filter; 105 - Disc filter; 106 - Ultrafiltration unit, 1061 - Ultrafiltration unit #1, 1062 - Ultrafiltration unit #2; 107 - Clean water tank; 108 - First return line; 109 - Ultrafiltration backwash pump;

[0072] 201-clean water pump; 202-safety filter; 203-reverse osmosis high-pressure pump; 204-reverse osmosis device; 205-fresh water tank; 206-second return pipe; 207-reverse osmosis cleaning water pump;

[0073] 301-Fresh water pump; 302-Cationic bed; 303-Decarbonizer; 304-Decarbonization fan; 305-Intermediate water tank; 306-Intermediate water pump; 307-Anion bed; 308-Mixed bed; 309-Desalted water tank; 310-Desalted water pump. DETAILED DESCRIPTION

[0074] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0075] Example 1

[0076] Combine Figure 1-4 As shown, an embodiment of the present invention provides a chemical water production system for a thermal power plant, including an ultrafiltration water treatment system 1, a reverse osmosis water treatment system 2, a mixed bed water treatment system 3, a one-button start-stop control system and a desalination dosing system; the desalination dosing system includes a coagulant dosing device, a bactericide dosing device, a scale inhibitor dosing device and a reducing agent dosing device.

[0077] Among them, combined Figure 1 As shown, the ultrafiltration water treatment system 1 is used to pre-treat the water source of a thermal power plant to remove harmful substances such as bacteria, rust, and colloids in the water; the ultrafiltration water treatment system 1 includes an industrial water tank 101, an ultrafiltration water pump 102, a raw water heater 103, a dual-media filter 104, a disc filter 105, an ultrafiltration device 106, and a clean water tank 107, which are connected in sequence. The water inlet pipe of the industrial water tank 101 is connected to the water source of the thermal power plant;

[0078] The reverse osmosis water treatment system 2 is used to treat the water produced by the ultrafiltration water treatment system, removing most of the soluble salts, colloids, organic matter and microorganisms in the water; the reverse osmosis water treatment system 2 includes a clean water pump 201, a security filter 202, a reverse osmosis high-pressure pump 203, a reverse osmosis device 204 and a fresh water tank 205, which are connected in sequence; the water inlet of the clean water pump 201 is connected to the clean water tank 107 of the ultrafiltration water treatment system 1;

[0079] The mixed bed water treatment system 3 is used to treat the water produced by the reverse osmosis water treatment system, which can reduce the hardness, alkalinity and anions and cations in the water; the mixed bed water treatment system 3 includes a fresh water pump 301, a cationic bed 302, a decarbonizer 303, an intermediate water tank 305, an intermediate water pump 306, an anionic bed 307 and a mixed bed 308 connected in sequence; the fresh water pump 301 is connected to the fresh water tank 205 of the reverse osmosis water treatment system 2, and the water produced at the outlet of the mixed bed 308 is connected to the desalted water tank 309 or directly reaches the water facility for removal; the water in the desalted water tank 309 is transported to the water facility in low terrain through a static pressure transmission pipeline, or is transported to the water facility in medium / high terrain through a transmission pipeline with a desalted water pump 310;

[0080] The one-button start-stop control system is electrically connected to the ultrafiltration water treatment system 1, the reverse osmosis water treatment system 2, and the mixed bed water treatment system 3, respectively, and is used to monitor, control and collect the operating status parameters of the ultrafiltration water treatment system 1, the reverse osmosis water treatment system 2 and the mixed bed water treatment system 3.

[0081] Among them, combined Figure 2 As shown, the ultrafiltration water treatment system 1 is two sets connected in parallel; the two sets of the ultrafiltration water treatment system 1 include two industrial water tanks 101, four ultrafiltration water pumps 102, two raw water heaters 103, four dual-media filters 104, two disc filters 105, two ultrafiltration devices 106 and two clean water tanks 107. The two ultrafiltration devices 106 are: #1 ultrafiltration device 1061 and #2 ultrafiltration device 1062.

[0082] Specifically, the water outlets of the two industrial water tanks 101 are connected in parallel and then collected into a main pipe, which is then respectively connected to the water inlets of the four ultrafiltration water pumps 102. The water outlets of the four ultrafiltration water pumps 102 are connected in parallel and then collected into a main pipe, which is then respectively connected to the water inlets of the two raw water heaters 103. The water outlets of the two raw water heaters 103 are connected in parallel and then collected into a main pipe, which is then respectively connected to the water inlets of the four dual-media filters 104. The water outlets of the four dual-media filters are connected in parallel and then collected into a main pipe, which is then respectively connected to the water inlets of the two disc filters 105. The water outlets of the two disc filters 105 are connected in parallel and then collected into a main pipe, which is then respectively connected to the water inlets of the two ultrafiltration devices 106. The water outlets of the two ultrafiltration devices 106 are connected in parallel and then collected into a main pipe, which is then respectively connected to the water inlets of the two clean water tanks 107.

[0083] The ultrafiltration water treatment system also includes a cleaning water tank 4. The water outlets of two ultrafiltration devices 106 are connected in parallel and then converged into a main pipe to connect to the cleaning water tank 4; the cleaning water tank 4 is refluxed to the two ultrafiltration devices 106 respectively through a first reflux pipe 108, and two parallel ultrafiltration backwash water pumps 109 are arranged on the first reflux pipe 108 for backwashing the two ultrafiltration devices 106.

[0084] At the same time, the coagulant dosing device and the bactericide dosing device are connected to the outlet main pipe of the ultrafiltration water pump, and are used to add coagulants and bactericides to the outlet main pipe of the ultrafiltration water pump. The coagulant can remove the color SS, COD, BOD and heavy metal ions such as arsenic and mercury in the water, such as polyaluminum chloride; the reason for adding the bactericide is: in the long-term water production process of the filtration device, due to the high organic matter content in the influent, under certain conditions, some bacteria and algae will breed in the membrane component, causing the filter membrane to be blocked. By adding the bactericide, such bacteria and other organisms are killed.

[0085] The ultrafiltration water treatment system for the chemical water production system of a thermal power plant provided by the embodiment of the present invention heats the raw water by providing a raw water heater so that it can meet the requirements of subsequent process equipment treatment, thereby improving water production efficiency and water quality; at the same time, the filtration is carried out in sequence through a dual-media filter-disc filter-ultrafiltration device, thereby jointly ensuring the filtration accuracy of the ultrafiltration water treatment system and the water production quality of the entire system.

[0086] The raw water heater 103 is an existing pipeline hybrid heating device, which is a hybrid heating device that uses steam to directly heat water to a required temperature.

[0087] The dual-media filter 104 is a cylindrical cylinder with a water inlet at the upper end. An anthracite filter layer and a quartz sand filter layer are arranged in sequence from top to bottom inside, and a water outlet is provided at the bottom. The anthracite filter layer has an anthracite particle size of 0.8-1.2 mm and a layer height of 400 mm. The quartz sand filter layer includes a first quartz sand filter layer and a second quartz sand filter layer arranged at intervals above and below. The quartz sand particle size of the first quartz sand filter layer is 0.45-0.8 mm and the layer height is 700 mm. The quartz sand particle size of the first quartz sand filter layer is 0.8-1.2 mm and the layer height is 700 mm.

[0088] The filter principle of the dual-media filter 104 is: adopting the reverse particle size filtration principle, during operation, water enters from the top, flows through the filter layer, and flows out from the bottom. At the same time, coagulant and bactericide are added to the water inlet main pipe (added at the water outlet main pipe of the ultrafiltration water pump), which can effectively remove suspended matter, grease, colloid and other impurities in the raw water.

[0089] The dual-media filter should be backwashed regularly to remove suspended matter, colloids and other substances attached to the surface. The backwash process is as follows: water enters from the bottom and is discharged from the top. The backwash conditions are: when the operating pressure difference reaches 0.1 MPa, or when the set operating cycle is reached, backwashing will be automatically performed. When the periodic water production is reached, the need for backwashing can be manually determined.

[0090] The filtration principle of the disc filter 105 is as follows: the filtration accuracy is 100μm to remove larger particulate impurities in the raw water and meet the water inlet requirements of ultrafiltration; during the filtration process, impurities in the water are deposited and intercepted in the disc, thus forming a pressure differential between the inside and outside of the disc. When the pressure differential reaches a preset value, the electronic controller gives a signal, and the three-way valve switches to the water production and sewage discharge direction. The produced water uses the pressure of the produced water to enter the central tube of the disc filter through the three-way valve to flush the disc. The disc is loosened and rotated under the flushing of water, and the deposited particles are thrown out and discharged through the sewage outlet. The entire cleaning process lasts for tens of seconds. At the end of the cleaning, the three-way valve switches to the water inlet and water production direction, and the system begins to enter the next filtration process. The cleaning parameters are: backwash water volume: 20m3 / h, backwash pressure ≥0.35MPa, backwash duration (each filter head group) 20 seconds, and cleaning is carried out regularly by program control or controlled by pressure differential.

[0091] The screening pore size of the ultrafiltration device 106 is 0.05-0.1um; it adopts membrane separation technology, and its membrane has a porous asymmetric structure, which is mainly used for the separation of substances at the macromolecular level in the solution; its filtration process is a solution separation process based on the mechanical screening principle and driven by the pressure difference on both sides of the membrane; the operating pressure is 0.1-0.6MPa, and the molecular weight that can be retained is about 50,000-1 million Daltons.

[0092] Combine Figure 3As shown, the reverse osmosis water treatment system 2 is two sets connected in parallel; each reverse osmosis water treatment system 2 includes a clean water pump 201, a security filter 202, a reverse osmosis high-pressure pump 203, a reverse osmosis device 204 and a fresh water tank 205 connected in sequence; the water inlet of the clean water pump 201 corresponds to the water outlet of the clean water tank 107 in the ultrafiltration water treatment system 1.

[0093] The reverse osmosis water treatment system also includes a cleaning water tank, which can be set up separately or shared with the cleaning water tank of the ultrafiltration water treatment system. In the embodiment of the present invention, the reverse osmosis water treatment system and the ultrafiltration water treatment system share a cleaning water tank 4. Figure 3 As shown, the water outlets of the two reverse osmosis devices 201 are connected in parallel and then converged into a main pipe to be connected to the cleaning water tank 4; the cleaning water tank 4 is returned to the two reverse osmosis devices respectively through a second return pipe 206, and two parallel reverse osmosis cleaning water pumps 207 are provided on the second return pipe 206 for cleaning the reverse osmosis device 204.

[0094] At the same time, the reducing agent dosing device is connected to the outlet main pipe of the clean water pump, which is used to add reducing agent to the outlet main pipe of the clean water pump and enter the safety filter through the pipeline to prevent the bactericide added in the previous pipeline from oxidizing the filter membrane of the safety filter.

[0095] The scale inhibitor dosing device is connected to the water inlet main pipe of the security filter. By adding scale inhibitor to the water inlet main pipe of the security filter, impurities are dispersed to prevent the water entering the security filter from scaling and clogging the filter membrane, thereby ensuring the filtering effect of the security filter.

[0096] Among them, 60 filter elements are installed in the security filter 202, which are used to intercept particles larger than 5um in the water to prevent them from entering the reverse osmosis system, and to prevent particles of this size from penetrating the reverse osmosis membrane assembly after being accelerated by the reverse osmosis high-pressure pump, causing a large amount of salt leakage, while preventing the impeller of the reverse osmosis high-pressure pump from being scratched.

[0097] The reverse osmosis high-pressure pump 203 provides sufficient water inlet pressure for the reverse osmosis main unit according to the characteristics of reverse osmosis itself to overcome resistance such as osmotic pressure, ensure the normal operation of the reverse osmosis membrane, and thus ensure that the designed water production is achieved.

[0098] Combine Figure 3 As shown, the mixed bed water treatment system 3 is two sets in parallel; the two sets of mixed bed water treatment systems 3 include 4 parallel fresh water pumps 301, 2 cationic beds 302, 1 decarbonizer 303, 1 intermediate water tank 305, 3 parallel intermediate water 306 pumps, 2 anionic beds 307, 2 mixed beds 308 and 2 desalted water tanks 309.

[0099] Specifically, the outlets of the two fresh water tanks 205 are connected in parallel and then collected into a main pipe and then respectively connected to the water inlets of the four fresh water pumps 301. The outlets of the four fresh water pumps 301 are connected in parallel and then collected into a main pipe and then respectively connected to the water inlets of the two catenary beds 302. The outlets of the two catenary beds 302 are connected in parallel and then collected into a main pipe and then connected to the water inlet of the decarbonizer 303. A decarbonizer blower 304 is provided on one side of the decarbonizer 303. The bottom water outlet is connected to the water inlet of the intermediate water tank 305, and the water outlet of the intermediate water tank 305 is respectively connected to the water inlets of three intermediate water pumps 306. The water outlets of the three intermediate water pumps 306 are connected in parallel and then collected into a main pipe and respectively connected to the water inlets of two anion beds 307; the water outlet of each anion bed 307 is respectively connected to the water inlet of a mixed bed 308, and the water outlet of the mixed bed 308 is connected to the desalted water tank 309 and / or water use facilities.

[0100] Example 2

[0101] An embodiment of the present invention provides a one-button start-stop control method for a chemical water production system in a thermal power plant. The system described in Example 1 is used to perform one-button start-stop control of "two ultrafiltration water treatment systems + two reverse osmosis water treatment systems + one mixed bed water treatment system." The method includes:

[0102] S1: One-button start-up pre-operation of the chemical water system, including:

[0103] S101: Select the equipment to be put into operation;

[0104] S102: It is determined that the "emergency stop" button of the dual-media filter and the #1 reverse osmosis device has not been pressed before entering the one-key start step of the ultrafiltration water treatment system;

[0105] S2: One-button start-up steps for the ultrafiltration water treatment system, including:

[0106] S201: Open the water inlet and outlet start valves of the selected disc filter;

[0107] S202: Start the selected ultrafiltration device;

[0108] S203: Dual-media filter front washing and water production have been selected, including:

[0109] S2031: Open the upper valve of the #1 ultrafiltration device;

[0110] S2032: Open the water inlet valve of the #1 ultrafiltration device and the return valve of the selected ultrafiltration water pump;

[0111] S2033: Start the selected ultrafiltration water pump;

[0112] S2034: The dual-media filter has been selected for front positive cleaning, including:

[0113] S20341: Open the top drain valve of the selected dual-media filter;

[0114] S20342: Open the inlet valve of the selected dual-media filter and set the front wash time to start the front wash;

[0115] S20343: After the front wash time ends, the front wash drain valve of the selected dual-media filter is started;

[0116] S20344: Close the top drain valve of the selected dual-media filter;

[0117] S20345: Set the forward wash time to start forward wash;

[0118] S20346: When the positive wash time ends, the outlet valve of the selected dual-media filter is opened;

[0119] S20347: Close the forward wash drain valve of the selected dual-media filter;

[0120] S2035: Dual media filter has been selected for water production, including:

[0121] S20351: Open the outlet valve of the selected dual-media filter;

[0122] S20352: Close the forward wash drain valve of the selected dual-media filter;

[0123] S20353: Set the water production time to start water production;

[0124] S2036: The front washing and water production steps of the selected dual-media filter have been completed;

[0125] S2037: #1 ultrafiltration device to produce water, specifically including:

[0126] S20371: Open the water production valve of the #1 ultrafiltration unit;

[0127] S20372: Close the upper discharge valve of the #1 ultrafiltration unit and the reflux valve of the ultrafiltration water pump;

[0128] S20373: Set the water production time to start water production;

[0129] S20374: After the water production time ends, the backwash step begins;

[0130] S2038: Backwashing of the #1 ultrafiltration device, including:

[0131] S20381: Turn off the selected ultrafiltration water pump;

[0132] S20382: Close the water inlet valve and water production valve of #1 ultrafiltration device in sequence

[0133] S20383: Open the upper discharge valve of the #1 ultrafiltration device;

[0134] S20384: Open the air inlet valve of the #1 ultrafiltration device and set the air inlet time;

[0135] S20385: After the air intake time ends, set the drainage time, close the air intake valve of the #1 ultrafiltration device and open the lower drain valve to drain water;

[0136] S20386: After the drainage time ends, set the upper backwash time, close the lower drain valve of the #1 ultrafiltration device, open the backwash inlet valve, and start the ultrafiltration backwash water pump for upper backwash;

[0137] S20387: The upper backwash time ends, the lower backwash time is set, the lower drain valve of the #1 ultrafiltration device is opened and the upper drain valve is closed for lower backwash;

[0138] S2039: #1 ultrafiltration device performs positive washing, specifically including:

[0139] S20391: Turn off the selected ultrafiltration backwash water pump;

[0140] S20392: Close the backwash inlet valve and drain valve of the #1 ultrafiltration unit in sequence;

[0141] S20393: Open the upper discharge valve, water inlet valve, and reflux valve of ultrafiltration unit #1 in sequence;

[0142] S20394: Start the selected ultrafiltration water pump and set the forward washing time for forward washing;

[0143] S20395: After the positive wash time ends, the water production time is set to start the water production sequence and complete the one-button start of the first ultrafiltration water treatment system;

[0144] S20396: After the #1 ultrafiltration device produces water for 300 seconds, the #2 ultrafiltration device is automatically put into operation. The operation steps are the same as S201-S20395;

[0145] S3: One-button start-up steps for the reverse osmosis water treatment system, specifically including:

[0146] S301: Low-pressure flushing of the #1 reverse osmosis device, including:

[0147] S3011: Open the concentrated water drain valve and the unqualified water drain valve of the #1 reverse osmosis unit;

[0148] S3012: Open the electric slow-opening valve of the #1 reverse osmosis device;

[0149] S3013: Set the low-pressure flushing time and start the clean water pump and reducing agent metering pump for low-pressure flushing;

[0150] S3014: Low-pressure flushing is completed and the concentrated water drain valve is closed;

[0151] S302: #1 reverse osmosis device discharges fresh water, specifically including:

[0152] Set the fresh water discharge time, start the reverse osmosis high-pressure pump and antiscalant metering pump to discharge fresh water;

[0153] S303: #1 reverse osmosis device produces water, specifically including:

[0154] S3031: Close the unqualified drain valve and set the water production time to start water production;

[0155] S3032: Water production is completed, open the unqualified drain valve

[0156] S3033: Shut down the reverse osmosis high-pressure pump, antiscalant metering pump, clean water pump, reducing agent metering pump, and electric full-open valve in sequence;

[0157] S3033: Open the concentrated water drain valve;

[0158] S304: The #1 reverse osmosis unit is shut down for flushing to remove impurities trapped in the reverse osmosis membrane. Specifically, the following steps are performed:

[0159] S3041: Turn off the reverse osmosis high-pressure pump;

[0160] S3042: Close the outlet electric valve of the reverse osmosis high-pressure pump;

[0161] S3043: Open the flushing water inlet valve, unqualified water drain valve, and concentrated water drain valve of the #1 reverse osmosis unit;

[0162] S3044: Set the downtime flushing time and start the reverse osmosis flushing water pump for downtime flushing;

[0163] S3045: After the shutdown and flushing is completed, the reverse osmosis flushing water pump, flushing water inlet valve, concentrated water drain valve and unqualified water drain valve are closed in sequence, completing the one-button startup of the first reverse osmosis water treatment system;

[0164] S3046: After the #1 reverse osmosis unit produces water for 300 seconds, the #2 reverse osmosis unit is automatically put into operation. The operation steps are the same as S301-S3045.

[0165] S4: One-button startup steps for the mixed bed water treatment system, specifically including:

[0166] S401: One-button start pre-operation of the mixed bed water treatment system, including:

[0167] S401: Select the cation bed, anion bed and mixed bed to be put into operation;

[0168] S402: judging that the selected fresh water tank level is greater than 2 meters, and allowing the start;

[0169] S402: Mixed bed water treatment system startup steps:

[0170] S4021: Start the exhaust pneumatic valve and water inlet pneumatic valve of the selected positive bed in sequence;

[0171] S4022: Start the fresh water pump (fresh water pump #1 is selected first; if fresh water pump #1 is in the "disabled" or "power off" state, fresh water pump #2 is selected; if fresh water pump #2 is in the "disabled" or "power off" state, fresh water pump #3 is selected; if fresh water pump #3 is in the "disabled" or "power off" state, fresh water pump #4 is selected);

[0172] S4023: For the selected positive bed, set the water injection time to 30s;

[0173] S4024: Open the positive wash drainage pneumatic valve and instrument isolation pneumatic valve of the selected positive bed, and close the exhaust pneumatic valve to start positive wash;

[0174] S4025: Yang bed Na has been selected + When the concentration is less than 50ug / L or the set water injection time is completed, start the decarbonization fan, open the selected cation bed water production pneumatic valve and close the forward wash drainage pneumatic valve;

[0175] S4026: Determine if the liquid level in the intermediate water tank is greater than 1 meter. If the condition is not met, wait. If the condition is met, start the exhaust pneumatic valve and water inlet pneumatic valve of the selected negative bed.

[0176] S4027: Start the intermediate water pump (preferably the #1 intermediate water pump. If the #1 intermediate water pump is in the "disabled" or "power-off" state, the #2 intermediate water pump is selected. If the #2 intermediate water pump is in the "disabled" or "power-off" state, the #3 intermediate water pump is selected).

[0177] S4028: For the selected anion bed, set the water injection time to 30 seconds;

[0178] S4029: Open the positive wash drainage pneumatic valve and instrument isolation pneumatic valve of the selected anion bed, and close the exhaust pneumatic valve to start positive wash;

[0179] S4030: When the anion bed DD is less than 5us / cm, the exhaust pneumatic valve and the water inlet pneumatic valve of the mixed bed are opened in sequence;

[0180] S4031: Open the water production pneumatic valve of the selected anion bed and close the positive wash and drainage pneumatic valve of the selected anion bed with a delay of 30 seconds;

[0181] S4032: Open the pneumatic valve for the positive wash drainage of the selected mixed bed and the pneumatic valve for the instrument isolation of the selected cation bed;

[0182] S4033: Close the exhaust pneumatic valve that has selected buffering;

[0183] S4034: When the DD of the selected mixed bed is less than 0.15us / cm, the water production pneumatic valve of the selected mixed bed is opened with a delay of 60s and the forward washing pneumatic valve is closed.

[0184] Note: In the above one-button start-up steps of the chemical water system, if the water production index of the ultrafiltration device or reverse osmosis device is abnormal, the cationic bed Na + If the concentration is greater than 50ug / L, the anion bed DD is greater than 5us / cm, or the mixed bed DD is greater than 0.2us / cm, the early warning system will issue a photon alarm and voice prompt, prompting the operator to manually judge whether to stop the operation based on the accuracy of the data.

[0185] S5: One-click shutdown steps for the chemical water production system, including:

[0186] S501: Click the “Stop” button;

[0187] S502: Backwashing of the ultrafiltration water treatment system, specifically including:

[0188] S5021: Turn off the selected ultrafiltration water pump;

[0189] S5022: Close the water inlet valve and water production valve of the #1 ultrafiltration device in sequence, and open the air inlet valve;

[0190] S5023: Ultrafiltration water treatment system drainage:

[0191] Close the air inlet valve of #1 ultrafiltration device and open the drain valve, set the drain time to drain;

[0192] S5024: Backwash on ultrafiltration water treatment system:

[0193] Close the drain valve of #1 ultrafiltration device and open the backwash inlet valve, set the backwash time, and start the ultrafiltration backwash water pump to feed water for backwash;

[0194] S5025: Ultrafiltration water treatment system backwash:

[0195] Open the lower drain valve of the #1 ultrafiltration device and close the upper drain valve, set the lower backwash time and perform the lower backwash;

[0196] S5026: After the backwash of the #1 ultrafiltration unit is completed, the #2 ultrafiltration unit is shut down for 300 seconds. The shutdown steps are the same as S5021-S5026.

[0197] S503: The first reverse osmosis water treatment system starts to shut down after the backwash of the #1 ultrafiltration unit is completed, including:

[0198] S5031: Open the flushing water inlet pneumatic valve, and at the same time open the unqualified water drainage pneumatic valve and the concentrated water drainage pneumatic valve;

[0199] S5032: Set the flushing time and start the reverse osmosis flushing pump;

[0200] S5033: The flushing time ends and the reverse osmosis flushing water pump is stopped;

[0201] S5033: Close the flushing water inlet pneumatic valve, the unqualified water drainage pneumatic valve, and the concentrated water drainage pneumatic valve;

[0202] S5034: After the #1 reverse osmosis unit is shut down, a delay of 300 seconds is applied before the #2 reverse osmosis unit is shut down. The shutdown steps are the same as S5031-S5033.

[0203] S504: Mixed bed water treatment system shutdown, including:

[0204] S5041: Stop fresh water pump;

[0205] S5042: Close the water inlet pneumatic valve and water production pneumatic valve of the selected cation bed in sequence;

[0206] S5043: Open the exhaust pneumatic valve of the selected positive bed and delay for 30 seconds;

[0207] S5044: Close the exhaust pneumatic valve of the selected positive bed;

[0208] S5045: Turn off the carbon removal fan;

[0209] S5046: Turn off the intermediate water pump;

[0210] S5047: Close the water inlet pneumatic valve and water production pneumatic valve of the selected anion bed;

[0211] S5048: Close the water inlet pneumatic valve and water production pneumatic valve of the selected mixed bed;

[0212] S5049: Open the selected anion bed exhaust pneumatic valve and delay for 30 seconds;

[0213] S50410: Close the selected anion bed exhaust valve;

[0214] S50411: Open the exhaust pneumatic valve of the selected mixed bed and delay for 30 seconds;

[0215] S50412: Close the selected mixed bed exhaust pneumatic valve.

[0216] At this point, the one-button start and stop control of "2 ultrafiltration water treatment systems + 2 reverse osmosis water treatment systems + 1 mixed bed water treatment system" in the chemical water production system of the thermal power plant has been completed.

[0217] The above description is only an embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the scope of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A one-button start-stop control method for a chemical water production system in a thermal power plant, applied to a chemical water production system in a thermal power plant, characterized in that: The method comprises: S1: One-button start-up pre-operation of the chemical water system, including: S101: Select the equipment to be put into operation; S102: It is determined that the "emergency stop" button of the dual-media filter and the reverse osmosis device has not been pressed before entering the one-key start step of the ultrafiltration water treatment system; S2: One-button start-up steps for the ultrafiltration water treatment system, including: S201: Dual-media filter front washing and water production have been selected; S202: The ultrafiltration device has been selected for water production and backwashing; S203: The ultrafiltration device has been selected for positive washing; S204: The ultrafiltration device has been selected to produce water, the water production time is set, and the water production sequence is started, completing the one-button start of the first ultrafiltration water treatment system; S3: One-button start-up steps for the reverse osmosis water treatment system, specifically including: S301: Low-pressure flushing of the reverse osmosis device has been selected; S302: Freshwater discharge from the reverse osmosis unit has been selected; S303: Reverse osmosis device has been selected to produce water; S304: The reverse osmosis unit has been selected for shutdown and flushing; S305: After the shutdown and flushing is completed, the reverse osmosis flushing water pump, flushing water inlet valve, concentrated water drain valve and unqualified water drain valve are closed in sequence, completing the one-button start of the selected reverse osmosis water treatment system; S4: One-button start-up steps for the mixed bed water treatment system, including: S401: One-button start pre-operation of the mixed bed water treatment system, including: S4011: Select the cation bed, anion bed and mixed bed to be put into operation; S4012: Determine that the selected fresh water tank level is greater than 2 meters, and allow startup; S402: mixed bed water treatment system startup step, sequentially starting the fresh water pump, the selected cation bed, the carbon removal fan, the intermediate water pump, the selected anion bed, and the selected mixed bed; S5: One-click shutdown steps for the chemical water production system, including: S501: Click the "Stop" button; S502: backwashing of ultrafiltration water treatment system; The backwashing of the ultrafiltration water treatment system includes drainage, upper backwashing and lower backwashing steps; After the backwash of the current ultrafiltration device is completed, a delay of t is applied and the next ultrafiltration device is shut down using the same steps; S503: The reverse osmosis water treatment system starts to shut down when the backwash of the corresponding ultrafiltration device is completed, specifically including: Open the flushing water inlet pneumatic valve, open the unqualified drainage pneumatic valve and the concentrated water drainage pneumatic valve at the same time, set the flushing time, and start the reverse osmosis flushing water pump; when the flushing time is over, stop the reverse osmosis flushing water pump, and close the flushing water inlet pneumatic valve, the unqualified drainage pneumatic valve, and the concentrated water drainage pneumatic valve; After the current reverse osmosis device is shut down for a delay of t, the next reverse osmosis device is shut down using the same steps; S504: The mixed bed water treatment system is shut down, and the fresh water pump, selected cation bed, decarbonization fan, intermediate water pump, selected anion bed, and selected mixed bed are shut down in sequence.

2. The method according to claim 1, characterized in that When two ultrafiltration water treatment systems are in operation, the one-key start step of the ultrafiltration water treatment system in step S2 further includes: S205: After the first ultrafiltration water treatment system produces water, a delay of t is applied, and the second ultrafiltration water treatment system is automatically selected and put into operation. The operation steps are the same as S201-S204.

3. The method according to claim 1, characterized in that When two reverse osmosis water treatment systems are in operation, the one-key start step of the reverse osmosis water treatment system in step S3 further includes: S306: After the first reverse osmosis water treatment system produces water, a delay of t is applied, and the next reverse osmosis water treatment system is automatically selected for operation. The operation steps are the same as S301-S30.

4. The method according to claim 1, wherein It also includes an early warning system. During the one-button start-up of the chemical water system, if the water production indicators of the ultrafiltration device or reverse osmosis device are abnormal, or the cationic bed Na + If the concentration is greater than 50ug / L, the anion bed DD is greater than 5us / cm, or the mixed bed DD is greater than 0.2us / cm, the early warning system will issue a photon alarm and voice prompt, prompting the operator to manually judge whether to shut down the equipment based on the accuracy of the data.

5. The method according to claim 1, wherein The system comprises: At least one ultrafiltration water treatment system for pre-treating the water source of the thermal power plant; the ultrafiltration water treatment system includes an industrial water tank, an ultrafiltration water pump, a raw water heater, a dual-media filter, a disc filter, an ultrafiltration device, and a clean water tank, which are connected in sequence. The water inlet pipe of the industrial water tank is connected to the water source of the thermal power plant; At least one reverse osmosis water treatment system for treating the water produced by the ultrafiltration water treatment system; the reverse osmosis water treatment system comprises a clean water pump, a safety filter, a reverse osmosis high-pressure pump, a reverse osmosis device, and a fresh water tank connected in sequence; the water inlet of the clean water pump is connected to the clean water tank of the ultrafiltration water treatment system; At least one mixed bed water treatment system for treating the water produced by the reverse osmosis water treatment system; the mixed bed water treatment system comprises a fresh water pump, a cation bed, a carbon remover, an intermediate water tank, an intermediate water pump, an anion bed, and a mixed bed connected in sequence; the fresh water pump is connected to the fresh water tank of the reverse osmosis water treatment system, and the water produced at the outlet of the mixed bed is connected to the desalted water tank and / or water use facilities; A one-button start-stop control system is electrically connected to the ultrafiltration water treatment system, the reverse osmosis water treatment system and the mixed bed water treatment system, respectively, and is used to monitor, control and collect operating status parameters of the ultrafiltration water treatment system, the reverse osmosis water treatment system and the mixed bed water treatment system.

6. The method according to claim 5, characterized in that The ultrafiltration water treatment system consists of two sets connected in parallel; The two sets of ultrafiltration water treatment systems include two industrial water tanks, four ultrafiltration water pumps, two raw water heaters, four dual-media filters, two disc filters, two ultrafiltration devices and two clean water tanks; The outlets of two industrial water tanks are connected in parallel and then collected into a main pipe, which is then connected to the water inlets of four ultrafiltration water pumps. The outlets of the four ultrafiltration water pumps are connected in parallel and then collected into a main pipe, which is then connected to the water inlets of two raw water heaters. The water outlets of the two raw water heaters are connected in parallel and then collected into a main pipe, which is then connected to the water inlets of the four dual-media filters respectively. The water outlets of the four dual-media filters are connected in parallel and then collected into a main pipe, which is then connected to the water inlets of the two disc filters respectively. The water outlets of the two disc filters are connected in parallel and then collected into a main pipe, which is then connected to the water inlets of the two ultrafiltration devices respectively. The water outlets of the two ultrafiltration devices are connected in parallel and then collected into a main pipe, which is then connected to the water inlets of the two clean water tanks respectively.

7. The method according to claim 6, characterized in that The ultrafiltration water treatment system also includes a cleaning water tank. The water outlets of the two ultrafiltration devices are connected in parallel and then converged into a main pipe to connect to the cleaning water tank; the cleaning water tank is returned to the two ultrafiltration devices respectively through a first return pipe, and two parallel ultrafiltration backwash water pumps are arranged on the first return pipe for backwashing the two ultrafiltration devices.

8. The method according to claim 7, characterized in that The reverse osmosis water treatment system consists of two sets connected in parallel; each reverse osmosis water treatment system includes a clean water pump, a safety filter, a reverse osmosis high-pressure pump, a reverse osmosis device and a fresh water tank connected in sequence; the water inlet of the clean water pump corresponds to the water outlet of the clean water tank in the ultrafiltration water treatment system.

9. The method according to claim 8, characterized in that The reverse osmosis water treatment system also includes a cleaning water tank. The water outlets of the two reverse osmosis devices are connected in parallel and then converged into a main pipe to connect to the cleaning water tank; the cleaning water tank is returned to the two reverse osmosis devices through a second return pipe, and two parallel reverse osmosis cleaning water pumps are provided on the second return pipe for cleaning the two reverse osmosis devices.

10. The method according to claim 9, characterized in that The mixed bed water treatment system consists of two sets connected in parallel; the two mixed bed water treatment systems include 4 fresh water pumps, 2 cationic beds, 1 decarbonizer, 1 intermediate water tank, 3 intermediate water pumps, 2 anionic beds, 2 mixed beds and 2 desalted water tanks; The water outlets of the two fresh water tanks are connected in parallel and collected into a main pipe, which is then connected to the water inlets of the four fresh water pumps respectively. The water outlets of the four fresh water pumps are connected in parallel and collected into a main pipe, which is then connected to the water inlets of the two cationic beds respectively. The water outlets of the two cationic beds are connected in parallel and collected into a main pipe, which is then connected to the water inlet of the decarbonizer. A decarbonizing blower is provided on one side of the decarbonizer. The bottom water outlet of the decarbonizer is connected to the water inlet of the intermediate water tank. The water outlets of the intermediate water tank are respectively connected to the water inlets of the three intermediate water pumps. The water outlets of the three intermediate water pumps are connected in parallel and collected into a main pipe, which is then connected to the water inlets of the two anion beds respectively. The water outlet of each anion bed is respectively connected to the water inlet of a mixed bed, and the water outlet of the mixed bed is connected to the desalted water tank and / or water setting.

11. The method according to claim 5, characterized in that The dual-media filter is a cylindrical body with a water inlet at the top, an anthracite filter layer and a quartz sand filter layer arranged in sequence from top to bottom inside, and a water outlet at the bottom. The anthracite filter layer has an anthracite particle size of 0.8-1.2 mm and a layer height of 400 mm; The quartz sand filter layer includes a first quartz sand filter layer and a second quartz sand filter layer arranged in an upper and lower interval; the quartz sand particle size of the first quartz sand filter layer is 0.45-0.8 mm and the layer height is 700 mm; the quartz sand particle size of the second quartz sand filter layer is 0.8-1.2 mm and the layer height is 700 mm.

12. The method according to claim 5, characterized in that The screening aperture of the ultrafiltration device is 0.05-0.1um; 60 filter elements are installed in the security filter to intercept particles larger than 5um in the water.

13. The method according to claim 5, characterized in that The system also includes a desalination dosing system, which includes a coagulant dosing device, a bactericide dosing device, a scale inhibitor dosing device and a reducing agent dosing device; the coagulant dosing device and the bactericide dosing device are connected to the outlet main pipe of the ultrafiltration water pump; the scale inhibitor dosing device is connected to the inlet main pipe of the safety filter; and the reducing agent dosing device is connected to the outlet main pipe of the clean water pump.

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