CCRO high-efficiency water treatment system and working method thereof

Abstract

The invention relates to the technical field of sewage treatment, in particular to a CCRO high-efficiency water treatment system and a working method thereof. Comprising a sewage tank, a water supply pump, a scale inhibitor injection module, a sodium hydrogen sulfite injection module, a bactericide injection module, a security filter, a static mixer, a high-pressure pump, a reverse osmosis membrane assembly, a reaction tank, a circulating pump, a cleaning pump, a water production tank and a concentration device which are connected through pipelines, the sewage tank, the water supply pump, the security filter, the static mixer, the high-pressure pump, the reverse osmosis membrane assembly, the reaction tank, the circulating pump, the cleaning pump and the water production tank are all provided with an outlet and an inlet, and the reverse osmosis membrane assembly is also provided with a drain outlet; the sewage pool, the water supply pump, the static mixer, the security filter, the high-pressure pump, the reverse osmosis membrane assembly and the water producing pool are sequentially connected through the outlet and the inlet through pipelines; the problem that an existing CCRO water treatment system is insufficient in automation degree can be effectively solved, the sewage treatment efficiency and quality are improved, the operation and maintenance cost is reduced, and wide application prospects are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a CCRO high-efficiency water treatment system and a working method thereof. Background Art

[0002] With the increasing requirements for environmental protection, sewage treatment has received more and more attention. As an improved process of the activated sludge method, the continuous cycle rotary activated sludge process (CCRO) has shown many advantages in the field of sewage treatment. The CCRO water treatment system covers a reaction tank, a sedimentation tank, a sludge return system, an inlet system and an outlet system. The reaction tank is the core, and its rotating device can circulate sewage and activated sludge at a flow rate of 0.2-0.5 meters per second to ensure that microorganisms and organic matter are fully in contact. At the same time, it is equipped with a variety of aeration equipment to improve oxygen utilization. There are many types of sedimentation tanks. The addition of flocculants can accelerate the separation of mud and water, and there is a specific sedimentation time. The sludge return system returns the precipitated sludge to the front end of the reaction tank in a certain proportion to maintain the microbial concentration. The inlet system completes sewage pretreatment and transportation, and the outlet system is responsible for monitoring and discharge. In the treatment process, the sewage enters the reaction tank and mixes with the activated sludge. The microorganisms decompose the organic pollutants and remove the nitrogen element through nitrification and denitrification. Then the mud and water are separated in the sedimentation tank to achieve standard discharge of clean water and reasonable disposal of sludge.

[0003] This process has outstanding performance in sewage treatment, with an organic matter removal rate higher than the traditional activated sludge method, which can reach 80%-95% or more. It can treat difficult-to-degrade organic matter and can flexibly deal with sewage of different types and concentrations, and improve the treatment effect by adjusting the reaction tank parameters. When treating the same amount of sewage, the required reaction tank and sedimentation tank occupy a smaller area, and its continuous circulation and rotation operation mechanism ensures the stability of the microbial environment, and can automatically adjust to cope with fluctuations in influent water quality and water volume.

[0004] However, the existing CCRO water treatment system has obvious deficiencies in automated operation. Although some operating parameters can be automatically adjusted according to changes in conventional water quality and water volume, the start and stop control of the pump and the control of the delivery rate often rely on manual operation during the transportation of sewage from the primary filtration device to the reaction tank, sedimentation tank, and fine filtration device. In addition, daily maintenance and cleaning of the system is essential. In the water treatment process, scale formation will reduce membrane flux, increase the frequency of membrane cleaning, and even damage the membrane assembly. If heat exchange is involved, scaling will also reduce heat exchange efficiency, increase energy consumption and maintenance costs. At the same time, microbial control is essential. In places where microorganisms are easily bred, such as water inlets, water tanks, pipelines, and membrane treatment units, bactericides must be used reasonably to maintain the normal operation of the system and meet water quality standards. Moreover, in some water inlet environments containing residual chlorine or oxidizing substances, residual chlorine will damage subsequent treatment equipment such as reverse osmosis membranes, and sodium bisulfite (SBS) must be used to eliminate the hazard, but scale treatment, bactericides, and sodium bisulfite addition all require manual operation and cannot be automated.

[0005] In summary, the existing CCRO water treatment system is limited by the degree of automation and cannot achieve fully automated operation. There are many requirements for manual intervention in the operation and maintenance links. It is necessary to develop new technical solutions to solve these problems. Summary of the invention

[0006] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0007] A CCRO high-efficiency water treatment system, comprising a sewage pool connected by pipelines, a water supply pump, an antiscalant injection module, a sodium bisulfite injection module, a bactericide injection module, a security filter, a static mixer, a high-pressure pump, a reverse osmosis membrane assembly, a reaction tank, a circulation pump, a cleaning pump, a water production tank and a concentration device; The sewage tank, water supply pump, security filter, static mixer, high-pressure pump, reverse osmosis membrane assembly, reaction tank, circulation pump, cleaning pump and water production tank all have outlets and inlets, and the reverse osmosis membrane assembly also has a sewage outlet. The sewage tank, water supply pump, static mixer, security filter, high-pressure pump, reverse osmosis membrane assembly and water production tank are connected by pipelines through the outlet and inlet in sequence. The antiscalant injection module pipeline is connected between the water supply pump and the static mixer, the sodium bisulfite injection module pipeline is connected between the static mixer and the security filter, and the bactericide injection module pipeline is connected between the security filter and the high-pressure pump; A first control valve is arranged on the pipeline between the outlet of the reverse osmosis membrane assembly and the inlet of the water production pool, the sewage outlet of the reverse osmosis membrane assembly is respectively connected to the second control valve and the third control valve through the circulating pump, the second control valve is used to connect the inlet of the reaction pool through the pipeline, and a branch is also formed between the inlet of the reaction pool and the second control valve and a fourth control valve is arranged, and the fourth control valve is connected to the concentration device through the pipeline; the outlet of the reaction pool and the third control valve are both connected to the inlet of the reverse osmosis membrane assembly through the pipeline, the outlet of the water production pool is connected to the first cleaning pipeline, the cleaning pump is arranged on the first cleaning pipeline, and the inlet of the cleaning pump corresponds to the outlet of the water production pool, the first cleaning pipeline is connected to the fifth control valve, a branch is arranged between the reverse osmosis membrane assembly and the high-pressure pump, and the pipeline is connected to the fifth control valve, a second cleaning pipeline is also arranged between the sewage outlet of the reverse osmosis membrane assembly and the inlet of the circulating pump, the second cleaning pipeline is connected to the inlet of the water production pool, and a sixth control valve is arranged on the second cleaning pipeline; A seventh control valve is provided between the safety filter and the high-pressure pump, and an additional pipeline is branched between the safety filter and the seventh control valve. The additional pipeline is connected to the outlet of the reaction tank, and an eighth control valve is provided on the additional pipeline.

[0008] Preferably, the reverse osmosis membrane assembly includes a single-core filter and a double-core filter, both of which have an inlet, an outlet and a drain port, wherein the inlet of the single-core filter is used to connect the outlet of the high-pressure pump, the fifth control valve, the outlet of the reaction tank and the third control valve via pipelines in sequence, the outlet of the single-core filter and the outlet of the two-core filter are both connected via pipelines to the inlet of the water production tank, the drain port of the single-core filter is connected via pipelines to the inlet of the two-core filter, and the inlet of the circulation pump and the sixth control valve are both connected via pipelines to the drain port of the two-core filter.

[0009] Preferably, the outlets of the water supply pump and the water production pool are both arranged at the bottom, and the bottoms of the water supply pump and the water production pool are both conical structures.

[0010] Preferably, the antiscalant injection module, the sodium bisulfite injection module and the bactericide injection module all include a liquid storage tank for storing a solvent, a first check valve arranged in the liquid storage tank, a diaphragm metering pump connected to the first check valve by a pipeline, and an injection valve connected to the diaphragm metering pump by a pipeline. The antiscalant injection module is connected between the water supply pump and the static mixer through the injection valve pipeline, the sodium bisulfite injection module is connected between the static mixer and the safety filter through the injection valve pipeline, and the bactericide injection module is connected between the safety filter and the high-pressure pump through the injection valve pipeline.

[0011] Preferably, manual valves are provided on the pipeline between the sewage pool and the water supply pump, on the pipeline between the static mixer and the safety filter, and on the pipeline between the fourth control valve and the concentrating device.

[0012] Preferably, a second check valve is connected to the outlet of the high-pressure pump, the outlet of the cleaning pump, the pipeline between the third control valve and the inlet of the reverse osmosis membrane assembly, and the pipeline between the reaction tank and the inlet of the reverse osmosis membrane assembly.

[0013] Preferably, sampling valves are provided on the pipeline between the outlet of the single-core filter and the inlet of the water production pool, on the pipeline between the outlet of the double-core filter and the inlet of the water production pool, and on the pipeline between the fourth control valve and the concentrating device.

[0014] Preferably, a sewage return pipeline is connected between the concentrating device and the reaction tank.

[0015] A working method of a CCRO high-efficiency water treatment system, applied to the above-mentioned CCRO high-efficiency water treatment system, comprises the following steps: Step 1, setting an air circuit control system and a circuit control system, the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve, the sixth control valve, the seventh control valve and the eighth control valve are all pneumatic control valves, the air circuit control system is provided with an air pump and a solenoid valve assembly connected to the air pump, the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve, the sixth control valve, the seventh control valve and the eighth control valve are pneumatically connected to the air pump through the solenoid valve assembly respectively; The circuit control system is provided with a control panel, a central control module, a redox potential transmitter, a conductivity transmitter, a flow transmitter, a pressure transmitter and a differential pressure transmitter. The control panel, the redox potential transmitter, the conductivity transmitter, the flow transmitter, the pressure transmitter, the differential pressure transmitter, the solenoid valve assembly, the antiscalant injection module, the sodium bisulfite injection module, the bactericide injection module, the water supply pump, the high-pressure pump, the circulation pump and the cleaning pump are electrically connected to the central control module respectively; The redox potential transmitter is arranged at the outlet of the static mixer, the conductivity transmitter pipeline is connected to the pipeline between the circulation pump and the second control valve, the flow transmitter and the pressure transmitter are both connected to the sewage outlet of the reverse osmosis membrane assembly through pipelines, and the differential pressure transmitter pipelines are connected to the inlet and outlet of the reverse osmosis membrane assembly; Step 2, set the system program, burn the program to the central control module, in the program, set the first pressure difference value and the second pressure difference value to compare with the value collected by the pressure difference transmitter; then according to the sewage treatment requirements, pre-set the maximum conductivity value, the minimum conductivity value, the concentrated conductivity value, the circulating water flow value, the concentrated water flow value, the circulating water pressure value and the concentrated water pressure value in the program burned into the central control module through the control panel based on the conductivity transmitter, the flow transmitter and the pressure transmitter; Step 3, sewage treatment, sewage treatment runs the following steps: Step 3.1, non-infiltration supply of sewage: run the water supply pump and open the eighth control valve to allow the sewage in the sewage pool to flow into the reaction tank; in this process, the central control module detects the redox potential of the sewage flowing out of the static mixer through the redox potential transmitter, thereby controlling the sodium bisulfite injection module to inject appropriate sodium bisulfite to ensure the stability of water quality and treatment effect in the subsequent treatment process; Step 3.2, circulation reaction: the circulation pump is running, the seventh control valve is closed, and the second control valve is opened, so that a sewage circulation system is formed between the circulation pump, the reverse osmosis membrane assembly and the reaction tank. At the same time, the flow transmitter and the pressure transmitter are used to detect the water flow and water pressure in the sewage circulation system, so as to adjust the eighth control valve, the water supply pump and the circulation pump, so that the sewage circulation system is kept at the set circulation water flow value and circulation water pressure value for reaction; Step 3.3, sewage filtration: when the conductivity transmitter detects that the conductivity in the sewage circulation system drops to a preset minimum conductivity value, the high-pressure pump is operated, and the seventh control valve and the first control valve are opened to raise the pressure value in the sewage circulation system to an osmotic pressure value at which water can pass through the reverse osmosis membrane assembly, thereby filtering clean water from the outlet of the reverse osmosis membrane assembly and flowing to the water production pool, until the conductivity transmitter detects that the conductivity in the sewage circulation system rises to a preset maximum conductivity value, the high-pressure pump is stopped, and the pressure value in the sewage circulation system drops to a value lower than the osmotic pressure value at which water can pass through the reverse osmosis membrane assembly, and the circulation reaction continues; Step 3.4, system maintenance: During the sewage filtration stage, the central control module compares the pressure differential transmitter with the preset first pressure differential value. When the pressure differential value at the inlet and outlet of the reverse osmosis membrane assembly collected by the pressure differential transmitter reaches the preset first pressure differential value, the antiscalant injection module and the bactericide injection module are controlled to inject a certain amount of antiscalant and bactericide to remove the scale and biofilm attached to the reverse osmosis membrane assembly; when the pressure differential value collected by the pressure differential transmitter is not lower than the second pressure differential value after removing the scale and biofilm attached to the reverse osmosis membrane assembly for a certain period of time, the high-pressure pump is stopped, and the seventh control valve and the second control valve are closed, the cleaning pump is run, the third control valve, the fifth control valve and the sixth control valve are opened, and the reverse osmosis membrane assembly is cleaned with clean water in the water production pool. After cleaning for a certain period of time, the sixth control valve is closed, the second control valve is opened, and the clean water after cleaning is transferred to the reaction tank, and then the cleaning pump and the fifth control valve are closed to continue the circulation reaction.

[0016] Compared with the prior art, the present invention has the following beneficial effects: Through the above technical solution, highly automated and efficient CCRO sewage treatment can be achieved. Through the coordinated work of the gas circuit control system and the circuit control system, highly automated control of the entire water treatment system is achieved. From sewage transportation, circulation reaction, filtration to system maintenance and cleaning, no manual intervention is required or only a small amount of manual monitoring is required in each link. For example, according to the real-time water quality parameters of sewage, such as redox potential and conductivity, the addition of reagents is automatically controlled, and according to the system operating parameters, such as flow, pressure, and pressure difference, the operation of the pump and the opening and closing of the valve are automatically adjusted, which greatly improves the operating efficiency and stability of the system, reduces the errors and uncertainties caused by manual operation, and reduces labor costs.

[0017] For automatic antiscaling and sterilization of CCRO high-efficiency water treatment system, the system is equipped with antiscalant injection module and bactericide injection module, which can automatically inject quantitative antiscalants and bactericides according to the pressure difference changes of membrane components monitored by the pressure difference transmitter, effectively prevent and remove scaling and biofilm in reverse osmosis membrane components, extend the service life of membrane components and reduce maintenance costs.

[0018] In terms of the automatic cleaning function of the CCRO high-efficiency water treatment system, when the chemical cleaning cannot effectively restore the performance of the membrane components, the system can automatically start the cleaning pump and use the clean water in the water production pool to clean the reverse osmosis membrane components. The cleaning process is highly automated and does not require manual operation, ensuring the long-term stable operation of the system. At the same time, the third control valve, the fifth control valve, and the sixth control valve installed on the cleaning pipeline can accurately control the flow direction and flow of the cleaning water to improve the cleaning effect.

[0019] In summary, the CCRO high-efficiency water treatment system and its working method have significant advantages in the field of sewage treatment. They can effectively solve the problem of insufficient automation of the existing CCRO water treatment system, improve sewage treatment efficiency and quality, reduce operation and maintenance costs, and have broad application prospects.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a system principle diagram of the present invention; Figure 2 The present invention Figure 1 Schematic diagram of the first half; Figure 3 The present invention Figure 1 Schematic diagram of the second half; Figure 4 It is a schematic diagram of the antiscalant injection module, the sodium bisulfite injection module or the bactericide injection module of the present invention; Figure 5 It is a block diagram of the circuit connection module of the present invention.

[0023] The reference numerals and names in the figures are as follows: Sewage tank 10, water supply pump 11, antiscalant injection module 12, sodium bisulfite injection module 13, bactericide injection module 14, security filter 15, static mixer 16, additional pipeline 17, manual valve 18, reverse osmosis membrane assembly 20, single-core filter 201, two-core filter 202, high-pressure pump 21, reaction tank 22, circulation pump 23, cleaning pump 24, water production tank 25, concentration device 26, return sewage pipeline 27, second check valve 28, sampling valve 29, solenoid valve assembly 30, the first A first control valve 31, a second control valve 32, a third control valve 33, a fourth control valve 34, a fifth control valve 35, a sixth control valve 36, a seventh control valve 37, an eighth control valve 38, a first cleaning pipeline 41, a second cleaning pipeline 42, a liquid storage tank 51, a first check valve 52, a diaphragm metering pump 53, an injection valve 54, a central control module 60, an operation panel 61, an oxidation-reduction potential transmitter 62, a conductivity transmitter 63, a flow transmitter 64, a pressure transmitter 65, and a differential pressure transmitter 66. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-5 , Figure 2 The present invention Figure 1 The schematic diagram of the first half, Figure 3 The present invention Figure 1 The schematic diagram of the second half, Figure 2 and Figure 3In the embodiment of the present invention, a CCRO high-efficiency water treatment system and a working method thereof include a sewage pool 10, a water supply pump 11, a scale inhibitor injection module 12, a sodium bisulfite injection module 13, a bactericide injection module 14, a security filter 15, a static mixer 16, a high-pressure pump 21, a reverse osmosis membrane assembly 20, a reaction tank 22, a circulation pump 23, a cleaning pump 24, a water production tank 25, a concentration device 26, a first control valve 31, a second control valve 32, a third control valve 33, a fourth control valve 34, a fifth control valve 35, a sixth control valve 36, a seventh control valve 37 and an eighth control valve 38 connected by pipelines.

[0026] In terms of system composition and connection, the CCRO high-efficiency water treatment system is composed of multiple key components and connected in order through pipelines. The sewage pool 10 is the source of sewage. After the pressure is increased by the water supply pump 11, the large particle impurities are removed in turn through the security filter 15, and the initial mixing treatment is carried out in the static mixer 16. Then, the high-pressure pump 21 is used to further increase the pressure so that the sewage can enter the reverse osmosis membrane module 20. The reverse osmosis membrane module 20 is the core part of sewage purification. The separated clean water flows to the water production pool 25, and the concentrated water is discharged through the sewage outlet and treated by the circulation pump 23. The reaction tank 22, the circulation pump 23, and the reverse osmosis membrane module 20 form a circulation loop to ensure that the sewage and the activated sludge are fully contacted and reacted. In addition, it is also equipped with a cleaning pump 24 for system cleaning, and a concentration device 26 for concentration treatment of specific sewage. A series of control valves are used to precisely control the flow direction and flow rate between the various components. Among them, the first control valve 31 controls the water flow from the outlet of the reverse osmosis membrane assembly 20 to the water production pool 25, and the second control valve 32 and the third control valve 33 cooperate with the circulation pump 23 to realize the circulation connection between the reverse osmosis membrane assembly 20 and the reaction pool 22.

[0027] In terms of automation control principles: Equipped with an air circuit control system, a plurality of control valves are arranged in the system, including the first control valve 31, the second control valve 32, the third control valve 33, the fourth control valve 34, the fifth control valve 35, the sixth control valve 36, the seventh control valve 37 and the eighth control valve 38, all of which are pneumatic control valves. The air circuit control system provides a power source through an air pump, and is equipped with a solenoid valve assembly 30, which plays a role in controlling the direction and flow of airflow, thereby realizing precise control of each pneumatic control valve. In the sewage filtration stage, according to the system pressure and flow requirements, the solenoid valve assembly 30 receives instructions from the central control module 60, controls the airflow output by the air pump to drive the relevant control valves to open or close, so as to adjust the working pressure of the reverse osmosis membrane assembly 20 and the flow direction of sewage.

[0028] It is equipped with a circuit control system, which is composed of a control panel 61, a central control module 60, a variety of transmitters, and various execution devices. The various transmitters include an oxidation-reduction potential transmitter 62, a conductivity transmitter 63, a flow transmitter 64, a pressure transmitter 65, and a differential pressure transmitter 66. The various execution devices include an antiscalant injection module 12, a sodium bisulfite injection module 13, a bactericide injection module 14, a water supply pump 11, a high-pressure pump 21, a circulation pump 23, and a cleaning pump 24. In the program burned in the central control module 60 through the control panel 61, the maximum conductivity value, the minimum conductivity value, the concentrated conductivity value, the circulating water flow value, the concentrated water flow value, the circulating water pressure value, and the concentrated water pressure value are pre-set based on the conductivity transmitter 63, the flow transmitter 64, and the pressure transmitter 65. The redox potential transmitter 62 is installed at the outlet of the static mixer 16 to monitor the redox potential of the sewage in real time. The central control module 60 controls the sodium bisulfite injection module 13 to inject an appropriate amount of sodium bisulfite into the sewage based on this data to eliminate the damage of oxidizing substances such as residual chlorine to subsequent equipment. The conductivity transmitter 63 is connected to the pipeline between the circulation pump 23 and the second control valve 32, and can monitor the conductivity change of the sewage circulation system. When the conductivity reaches the preset minimum or maximum value, it triggers the start and stop of the high-pressure pump 21 and the switching of the relevant control valves to achieve automatic control of sewage filtration. The flow transmitter 64 and the pressure transmitter 65 are located at the sewage outlet of the reverse osmosis membrane assembly 20, respectively monitoring the water flow and water pressure of the sewage circulation system, and providing a basis for the central control module 60 to adjust the operating parameters of the water supply pump 11, the circulation pump 23 and other equipment. The differential pressure transmitter 66 is connected to the inlet and outlet of the reverse osmosis membrane assembly 20 and is used to monitor the differential pressure of the membrane assembly. When the differential pressure reaches a preset first differential pressure value, the central control module 60 starts the antiscalant injection module 12 and the bactericide injection module 14 to inject a certain amount of antiscalant and bactericide into the system to prevent scaling of the membrane assembly and microbial growth. If the differential pressure still does not return to normal after cleaning, the cleaning pump 24 is triggered to run and the reverse osmosis membrane assembly 20 is cleaned.

[0029] In the sewage treatment process: Initially, the sewage supply basically realizes the non-infiltration supply of sewage. An additional pipeline 17 is also branched between the security filter 15 and the seventh control valve 37. The additional pipeline 17 is connected to the outlet of the reaction tank 22 by pipeline, and an eighth control valve 38 is arranged on the additional pipeline 17. The water supply pump 11 is started and the eighth control valve 38 is opened, and the sewage is transported from the sewage tank 10 to the reaction tank 22. In this process, the redox potential transmitter 62 continuously monitors the redox potential of the sewage flowing out of the static mixer 16, and the central control module 60 controls the sodium bisulfite injection module 13 to inject an appropriate amount of sodium bisulfite into the sewage according to the monitoring data, so as to ensure the stability of the water quality and the treatment effect in the subsequent treatment process, and prevent the residual chlorine from damaging the reverse osmosis membrane assembly 20 and other equipment.

[0030] The treatment of sewage realizes a cyclic reaction, the circulation pump 23 is started, the seventh control valve 37 is closed and the second control valve 32 is opened, so that a closed sewage circulation system is formed between the circulation pump 23, the reverse osmosis membrane assembly 20 and the reaction tank 22. During the circulation process, the flow transmitter 64 and the pressure transmitter 65 monitor the water flow and water pressure in the circulation system in real time, and feed the data back to the central control module 60. The central control module 60 adjusts the opening of the eighth control valve 38, the speed of the water supply pump 11 and the operating parameters of the circulation pump 23 according to the preset circulating water flow value and circulating water pressure value, so that the sewage maintains a stable flow rate and pressure in the circulation system, ensures that the microorganisms are fully in contact with the organic matter, and promotes the decomposition of organic pollutants by the microorganisms and the removal of nitrogen.

[0031] After the sewage treatment, the sewage is filtered. When the conductivity transmitter 63 detects that the conductivity in the sewage circulation system drops to the preset minimum conductivity value, it indicates that the concentration of pollutants in the sewage has been reduced to a certain extent. At this time, the central control module 60 starts the high-pressure pump 21 and opens the seventh control valve 37 and the first control valve 31. The high-pressure pump 21 increases the pressure in the sewage circulation system to the osmotic pressure value that water can pass through the reverse osmosis membrane assembly 20. Under the action of the pressure difference, the clean water is filtered out from the outlet of the reverse osmosis membrane assembly 20 and flows to the water production pool 25, while the concentrated water is discharged through the sewage outlet and a part of it is returned to the reaction pool 22 for further treatment through the circulation pump 23, and a part of it enters the concentration device 26 through the fourth control valve 34 for concentration treatment as needed. As the filtration process proceeds, the concentration of pollutants in the sewage gradually increases, and the conductivity also increases accordingly. When the conductivity transmitter 63 detects that the conductivity in the sewage circulation system has risen to the preset maximum conductivity value, the central control module 60 stops the high-pressure pump 21, so that the pressure value in the sewage circulation system drops to a value lower than the osmotic pressure at which water can pass through the reverse osmosis membrane assembly 20, and the system enters the circulation reaction stage again, and this process is repeated until the sewage meets the discharge standard.

[0032] In addition, the system maintenance function is also equipped. During the sewage filtration stage, the central control module 60 continuously compares the pressure difference value at the inlet and outlet of the reverse osmosis membrane assembly 20 collected by the pressure difference transmitter 66 with the preset first pressure difference value. When the pressure difference reaches the first pressure difference value, it indicates that scaling and biofilm adhesion have begun to appear in the reverse osmosis membrane assembly 20. The central control module 60 immediately controls the antiscalant injection module 12 and the bactericide injection module 14 to inject a certain amount of antiscalant and bactericide into the system to remove the scale and biofilm attached to the reverse osmosis membrane assembly 20 and restore the flux and filtration performance of the membrane assembly. If the pressure difference value collected by the pressure difference transmitter 66 is still not lower than the second pressure difference value after a period of reagent cleaning, it means that the scaling and biofilm problems are more serious. The central control module 60 stops the high-pressure pump 21, closes the seventh control valve 37 and the second control valve 32, starts the cleaning pump 24, and opens the third control valve 33, the fifth control valve 35 and the sixth control valve 36. At this time, the clean water in the water production pool 25 is used to reversely flush the reverse osmosis membrane assembly 20 under the action of the cleaning pump 24. The cleaning water flows through the second cleaning pipeline 42 and the third control valve 33 into the reverse osmosis membrane assembly 20, and the dirt and biofilm attached to the membrane assembly are washed away. The washed sewage is discharged through the sewage outlet. After a certain period of cleaning, the sixth control valve 36 is closed, the second control valve 32 is opened, the clean water after cleaning is transferred to the reaction pool 22, and then the cleaning pump 24 and the fifth control valve 35 are closed, and the system resumes the normal circulation reaction and sewage filtration process.

[0033] Through the above technical solution, highly automated and efficient CCRO sewage treatment can be achieved. Through the coordinated work of the gas circuit control system and the circuit control system, highly automated control of the entire water treatment system is achieved. From sewage transportation, circulation reaction, filtration to system maintenance and cleaning, no manual intervention is required or only a small amount of manual monitoring is required in each link. For example, according to the real-time water quality parameters of sewage, such as redox potential and conductivity, the addition of reagents is automatically controlled, and according to the system operating parameters, such as flow, pressure, and pressure difference, the operation of the pump and the opening and closing of the valve are automatically adjusted, which greatly improves the operating efficiency and stability of the system, reduces the errors and uncertainties caused by manual operation, and reduces labor costs.

[0034] The CCRO high-efficiency water treatment system has a high pollutant removal rate, that is, the rotating device in the reaction tank 22 allows the sewage and activated sludge to circulate at a specific flow rate, ensuring sufficient contact between microorganisms and organic matter. Combined with nitrification and denitrification, it can effectively remove organic pollutants and nitrogen in sewage. The organic matter removal rate can reach more than 80%-95%, which has obvious advantages over the traditional activated sludge method. It can also treat difficult-to-degrade organic matter and has strong adaptability to sewage of different types and concentrations. The treatment effect can be further improved by flexibly adjusting the parameters of the reaction tank 22.

[0035] The stable operation of CCRO high-efficiency water treatment system provides a stable living environment for microorganisms through the continuous circulation and rotation operation mechanism, enabling them to continuously and efficiently play the role of decomposing pollutants. At the same time, the system can automatically respond to fluctuations in influent water quality and water volume, and ensure the stability and continuity of the sewage treatment process through real-time monitoring and adjustment of operating parameters, avoiding the decline of treatment effect or system failure due to changes in water quality and water volume.

[0036] The CCRO high-efficiency water treatment system occupies a small area. When treating the same amount of sewage, the reaction tank 22 and the water production tank 25 required by the CCRO water treatment system occupy a smaller area. This is of great significance for areas with limited land resources or the expansion of large sewage treatment plants, and can effectively reduce construction costs and land occupation costs.

[0037] The modular design of the CCRO high-efficiency water treatment system is easy to maintain, that is, the system adopts a modular design, and the functions of each component are clear and relatively independent, which is convenient for installation, disassembly and maintenance. For example, the single-core filter 201 and the two-core filter 202 in the reverse osmosis membrane assembly 20 are reasonably designed in structure. Through the connection mode of the sewage outlet and the inlet and outlet, it can not only achieve effective filtration of sewage, but also facilitate separate operation when the membrane assembly fails or needs to be cleaned, thereby improving the maintainability and reliability of the system.

[0038] For automatic antiscaling and sterilization of the CCRO high-efficiency water treatment system, the system is equipped with an antiscalant injection module 12 and a bactericide injection module 14, which can automatically inject a quantitative amount of antiscalant and bactericide according to the pressure difference change of the membrane assembly monitored by the pressure difference transmitter 66, effectively preventing and removing scaling and biofilm in the reverse osmosis membrane assembly 20, extending the service life of the membrane assembly and reducing maintenance costs.

[0039] In terms of the automatic cleaning function of the CCRO high-efficiency water treatment system, when the chemical cleaning cannot effectively restore the performance of the membrane assembly, the system can automatically start the cleaning pump 24 and use the clean water in the water production pool 25 to clean the reverse osmosis membrane assembly 20. The cleaning process has a high degree of automation and does not require manual operation, ensuring the long-term stable operation of the system. At the same time, the third control valve 33, the fifth control valve 35, and the sixth control valve 36 set on the cleaning pipeline can accurately control the flow direction and flow of the cleaning water to improve the cleaning effect.

[0040] In summary, the CCRO high-efficiency water treatment system and its working method have significant advantages in the field of sewage treatment. They can effectively solve the problem of insufficient automation of the existing CCRO water treatment system, improve sewage treatment efficiency and quality, reduce operation and maintenance costs, and have broad application prospects.

[0041] On the basis of the above implementation, the present invention further optimizes each component, as follows: In the preferred embodiment of the present invention, the reverse osmosis membrane assembly 20 includes a single-core filter 201 and a double-core filter 202, both of which have an inlet, an outlet and a sewage outlet, wherein the inlet of the single-core filter 201 is used to connect the outlet of the high-pressure pump 21, the fifth control valve 35, the outlet of the reaction tank 22 and the third control valve 33 through pipelines in sequence, the outlet of the single-core filter 201 and the outlet of the double-core filter 202 are both connected to the inlet of the water production tank 25 through pipelines, the sewage outlet of the single-core filter 201 is connected to the inlet of the double-core filter 202 through pipelines, and the inlet of the circulating pump 23 and the sixth control valve 36 are both connected to the sewage outlet of the double-core filter 202 through pipelines; a two-stage filtration system is constructed by combining the single-core filter 201 and the double-core filter 202, which can effectively improve the filtration accuracy, finely remove impurities in sewage, and ensure the water quality of the water entering the water production tank 25. Its unique connection method makes the water flow distribution reasonable and the recycling efficient. The water from different sources such as the high-pressure pump 21 and the reaction tank 22 enters the single-core filter 201 in an orderly manner. After preliminary treatment, the qualified water and the water to be reprocessed flow to the water production tank 25 and the two-core filter 202 respectively. The connection between the sewage outlet of the two-core filter 202 and the circulation pump 23 and the sixth control valve 36 ensures the recycling of water resources. At the same time, this structure is convenient for maintenance and troubleshooting. The independent interface of each filter is convenient for accurate positioning of the fault, and maintenance operations can be performed separately, reducing maintenance costs and difficulty, and reducing interference with the overall operation of the system. It also enhances the overall stability of the system. The optimized water flow direction and connection design allow the system to accurately control parameters in different operation stages, effectively cooperate with the stable operation of the CCRO water treatment system, and effectively respond to changes in water quality and quantity.

[0042] In the preferred embodiment of the present invention, the outlets of the water supply pump 11 and the water production pool 25 are both arranged at the bottom, and the bottoms of the water supply pump 11 and the water production pool 25 are both conical structures; the outlet is arranged at the bottom, which is conducive to complete drainage, and the internal water can be discharged to the greatest extent, and the residual water volume can be reduced, and the problems such as the breeding of bacteria and algae or the deterioration of water quality due to the accumulation of water can be avoided. Especially for the water supply pump 11, it can effectively prevent the pump body from rusting or other damage due to the accumulation of water, prolong its service life and ensure its stable operation. The conical structure at the bottom further optimizes the drainage performance. The conical shape makes the water flow naturally converge to the outlet under the action of gravity, speeds up the drainage speed, and improves the drainage efficiency. Whether it is the water change operation in daily operation or the emptying operation during equipment maintenance and overhaul, it can be more convenient and efficient. For the water production pool 25, the conical bottom can also reduce the deposition of impurities in the bottom corners, which is conducive to maintaining the uniformity and stability of the overall water quality in the pool, reducing the difficulty and frequency of cleaning, and ensuring that the quality of the produced water is reliable and stable to supply the subsequent processing links or use needs.

[0043] In the preferred embodiment of the present invention, the antiscalant injection module 12, the sodium bisulfite injection module 13 and the bactericide injection module 14 all include a liquid storage tank 51 for storing solvents, a first check valve 52 arranged in the liquid storage tank 51, a diaphragm metering pump 53 connected to the first check valve 52 by a pipeline, and an injection valve 54 connected to the diaphragm metering pump 53 by a pipeline. The antiscalant injection module 12 is connected between the water supply pump 11 and the static mixer 16 through the injection valve 54 pipeline, the sodium bisulfite injection module 13 is connected between the static mixer 16 and the safety filter 15 through the injection valve 54 pipeline, and the bactericide injection module 14 is connected between the safety filter 15 and the high-pressure pump 21 through the injection valve 54 pipeline; the liquid storage tank 51 serves as a solvent storage container to provide a stable reserve for each agent, thereby ensuring sufficient supply of agents during system operation. The first check valve 52 is arranged in the liquid storage tank 51, which effectively prevents the backflow of the reagent, avoids contamination of the reagent in the liquid storage tank 51 or affects its concentration stability, and ensures the unidirectionality and purity of the reagent supply. The diaphragm metering pump 53 is connected to the first check valve 52, which can accurately control the output of the reagent, and accurately inject the appropriate amount of scale inhibitor, sodium bisulfite and bactericide into the corresponding pipeline position according to the actual needs of the system and the set parameters. Its high-precision metering characteristics ensure that the addition of the reagent will not cause waste or adverse effects on the system due to excessive addition, nor will it fail to play its due role due to insufficient addition. The injection valve 54 further ensures the accuracy and controllability of the reagent injection, and accurately delivers the reagent to the pipelines between the water supply pump 11 and the static mixer 16, between the static mixer 16 and the security filter 15, and between the security filter 15 and the high-pressure pump 21 at the right time, so as to achieve full mixing and efficient reaction of the reagent and sewage. Through the synergy of various components, the entire module can automatically and accurately complete the task of adding reagents, greatly improving the operating efficiency, stability and treatment effect of the CCRO water treatment system, reducing the risk of system failure, equipment damage and substandard water quality caused by improper reagent addition, and also reducing the need for manual intervention and labor costs.

[0044] In the preferred solution of this embodiment, manual valves 18 are provided on the pipeline between the sewage pool 10 and the water supply pump 11, on the pipeline between the static mixer 16 and the security filter 15, and on the pipeline between the fourth control valve 34 and the concentrator 26. The manual valve 18 is provided on the pipeline between the sewage pool 10 and the water supply pump 11. When the system needs to be inspected, maintained, or encounters an emergency, the valve can be manually operated to conveniently cut off the passage of sewage entering the water supply pump 11, ensuring that maintenance and other operations can be carried out safely. At the same time, it is also convenient to separately regulate the initial transportation link of sewage, such as in the initial startup and debugging stage of the system, the inflow of sewage can be more flexibly controlled. The manual valve 18 is provided on the pipeline between the static mixer 16 and the security filter 15. When the equipment is maintained, parts are replaced, or an abnormality occurs and a fault needs to be checked, the on and off of the section of the pipeline can be manually controlled to avoid unnecessary impact on upstream and downstream equipment during operation. In addition, when the mixing effect in the static mixer 16 is detected and adjusted, the manual valve 18 can be used to flexibly change the water flow state to assist in completing related operations. A manual valve 18 is provided on the pipeline between the fourth control valve 34 and the concentrating device 26. On the one hand, when the concentrating device 26 fails and needs to be repaired or regularly maintained, the valve can be manually closed to prevent sewage or other substances from continuing to flow in, so as to facilitate the maintenance personnel to work safely; on the other hand, the opening of the valve can be manually adjusted according to the actual needs of the concentration process, and the flow rate entering the concentrating device 26 and other parameters can be accurately controlled, so as to better adapt to the sewage treatment requirements under different working conditions, and further improve the operation flexibility and controllability of the entire CCRO water treatment system.

[0045] In the preferred embodiment of the present invention, the outlet of the high-pressure pump 21, the outlet of the cleaning pump 24, the pipeline between the third control valve 33 and the inlet of the reverse osmosis membrane assembly 20, and the pipeline between the reaction tank 22 and the inlet of the reverse osmosis membrane assembly 20 are all connected with a second check valve 28. The second check valve 28 is arranged at the outlet of the high-pressure pump 21, which can effectively prevent the water or other media in the reverse osmosis membrane assembly 20 from flowing back to the high-pressure pump 21, avoid reverse impact on the high-pressure pump 21, protect the key components such as the impeller of the high-pressure pump 21 from damage, ensure its stable and reliable operation, and also help maintain the normal pressure at the outlet of the high-pressure pump 21, and ensure that the entire sewage filtration process can be carried out smoothly according to the preset pressure conditions. The outlet of the cleaning pump 24 is connected to the second check valve 28, which can prevent the sewage or cleaning water after cleaning from flowing back to the cleaning pump 24 when the cleaning is completed or the system pressure fluctuates, prevent the problems such as pump body corrosion and internal blockage caused by this, extend the service life of the cleaning pump 24, and ensure the unidirectionality of the flow direction of the cleaning water, so that the cleaning operation can be carried out more orderly and efficiently, and achieve a good cleaning effect. A second check valve 28 is provided on the pipeline between the third control valve 33 and the inlet of the reverse osmosis membrane assembly 20, which can prevent the reverse flow of the liquid in the reverse osmosis membrane assembly 20, ensure that the water flow entering the membrane assembly after precise control by the control valve is stable and meets the requirements, which helps to maintain the pressure environment and filtration working state inside the membrane assembly, and improve the filtration efficiency and service life of the reverse osmosis membrane. A second check valve 28 is provided on the pipeline between the reaction tank 22 and the inlet of the reverse osmosis membrane assembly 20, which can prevent the liquid on the side of the reverse osmosis membrane assembly 20 from flowing back to the reaction tank 22, ensure that the reaction environment in the reaction tank 22 is not disturbed, and ensure that after the sewage fully reacts with the activated sludge in the reaction tank 22, it enters the reverse osmosis membrane assembly 20 in the correct direction for subsequent treatment, further maintaining the continuity and stability of the operation of the entire CCRO water treatment system.

[0046] In the preferred solution of this embodiment, sampling valves 29 are provided on the pipeline between the outlet of the single-core filter 201 and the inlet of the water production pool 25, on the pipeline between the outlet of the double-core filter 202 and the inlet of the water production pool 25, and on the pipeline between the fourth control valve 34 and the concentrator 26. The sampling valve 29 is provided on the pipeline between the outlet of the single-core filter 201 and the inlet of the water production pool 25, so that the staff can take out water samples for detection and analysis at any time. In this way, the water quality after being treated by the single-core filter 201 can be accurately grasped, and its removal effect on pollutants and whether the water quality meets the expected standards can be timely understood, so as to adjust the system operation parameters accordingly according to the detection results, ensure that the water quality finally flowing into the water production pool 25 is qualified, and ensure that the treatment effect of the entire water treatment system is stable and reliable. A sampling valve 29 is provided on the pipeline between the outlet of the two-core filter 202 and the inlet of the water production pool 25, which is also convenient for obtaining water samples for testing regularly or irregularly. Since the two-core filter 202 also plays a key role in the entire filtration process, through the sampling analysis here, it is possible to clearly know its further purification effect on the water treated by the single-core filter 201, and judge whether there are filtration abnormalities, etc., and then make accurate judgments on the operating status and maintenance requirements of the two-core filter 202, which helps to maintain the efficiency of the entire filtration process and the excellent quality of the water entering the water production pool 25. The sampling valve 29 is provided on the pipeline between the fourth control valve 34 and the concentrator 26, so that the operator can obtain the liquid sample that is about to enter the concentrator 26. Through detection, the key indicators such as its composition and concentration can be mastered. On the one hand, the opening of the fourth control valve 34 can be reasonably adjusted according to the actual situation, and the flow rate and substance content entering the concentrator 26 can be accurately controlled to make the concentration process more in line with the expected requirements; on the other hand, it can also timely detect whether there is any abnormal substance mixed in, check potential problems in advance, ensure the safe, stable and efficient operation of the concentrator 26, and improve the operation quality and reliability of the entire CCRO water treatment system.

[0047] In the preferred embodiment of the present invention, a return pipe 27 is also connected between the concentrator 26 and the reaction tank 22. This return pipe 27 allows the sewage containing a certain concentration of pollutants or reusable components obtained after treatment by the concentrator 26 to flow back to the reaction tank 22. On the one hand, it realizes the recycling of resources, and sends the substances that are still worth treating after concentration back to the reaction tank 22, so that the microorganisms therein can decompose, transform and treat them again, further improving the removal rate of pollutants by the entire sewage treatment system, minimizing the content of pollutants in sewage, and improving the efficiency and quality of sewage treatment. On the other hand, such a connection method helps to maintain the activity and ecological balance of the microbial community in the reaction tank 22, provides a continuous and relatively stable substrate source for microorganisms, enables microorganisms to continue to play a role, ensures that the treatment process in the reaction tank 22 is carried out stably and orderly, enhances the adaptability of the entire CCRO water treatment system to cope with different water quality and water volume changes, ensures the long-term stable operation of the system, and optimizes the overall effect of sewage treatment while saving resources.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A CCRO high-efficiency water treatment system, characterized in that: It includes a sewage tank (10) connected by pipelines, a water supply pump (11), an antiscalant injection module (12), a sodium bisulfite injection module (13), a bactericide injection module (14), a security filter (15), a static mixer (16), a high-pressure pump (21), a reverse osmosis membrane assembly (20), a reaction tank (22), a circulation pump (23), a cleaning pump (24), a water production tank (25) and a concentration device (26); The sewage tank (10), the water supply pump (11), the security filter (15), the static mixer (16), the high-pressure pump (21), the reverse osmosis membrane assembly (20), the reaction tank (22), the circulation pump (23), the cleaning pump (24) and the water production tank (25) all have an outlet and an inlet, and the reverse osmosis membrane assembly (20) also has a sewage outlet. The sewage tank (10), the water supply pump (11), the static mixer (16), the security filter (15), the high-pressure pump (21), the reverse osmosis membrane assembly (20) and the water production tank (25) are connected by pipelines in sequence through the outlet and the inlet. The antiscalant injection module (12) is connected by pipeline between the water supply pump (11) and the static mixer (16). The sodium bisulfite injection module (13) is connected by pipeline between the static mixer (16) and the security filter (15). The bactericide injection module (14) is connected by pipeline between the security filter (15) and the high-pressure pump (21). A first control valve (31) is provided on a pipeline between the outlet of the reverse osmosis membrane assembly (20) and the inlet of the water production pool (25); the sewage outlet of the reverse osmosis membrane assembly (20) is connected to a second control valve (32) and a third control valve (33) through pipelines respectively via a circulation pump (23); the second control valve (32) is used to connect the inlet of the reaction pool (22) through a pipeline; a fourth control valve (34) is also provided between the inlet of the reaction pool (22) and the second control valve (32); the fourth control valve (34) is connected to the concentration device (26) through a pipeline; the outlet of the reaction pool (22) and the third control valve (33) are both connected to the inlet of the reverse osmosis membrane assembly (20) through pipelines; The outlet of the water pool (25) is connected to a first cleaning pipeline (41), a cleaning pump (24) is arranged on the first cleaning pipeline (41), and the inlet of the cleaning pump (24) corresponds to the outlet of the water production pool (25), the first cleaning pipeline (41) is connected to a fifth control valve (35), a branch pipeline connected to the fifth control valve (35) is arranged between the reverse osmosis membrane assembly (20) and the high-pressure pump (21), a second cleaning pipeline (42) is further arranged between the sewage outlet of the reverse osmosis membrane assembly (20) and the inlet of the circulation pump (23), the second cleaning pipeline (42) is connected to the inlet of the water production pool (25), and a sixth control valve (36) is arranged on the second cleaning pipeline (42); A seventh control valve (37) is provided between the safety filter (15) and the high-pressure pump (21), and an additional pipeline (17) is branched and provided between the safety filter (15) and the seventh control valve (37). The additional pipeline (17) is connected to the outlet of the reaction tank (22) by a pipeline, and an eighth control valve (38) is provided on the additional pipeline (17).

2. A CCRO high-efficiency water treatment system according to claim 1, characterized in that: The reverse osmosis membrane assembly (20) comprises a single-core filter (201) and a double-core filter (202), wherein the single-core filter (201) and the double-core filter (202) both have an inlet, an outlet and a sewage outlet, wherein the inlet of the single-core filter (201) is used to connect the outlet of a high-pressure pump (21), a fifth control valve (35), the outlet of a reaction tank (22) and the third control valve (33) in sequence through pipelines, the outlet of the single-core filter (201) and the outlet of the double-core filter (202) are both connected through pipelines to the inlet of a water production tank (25), the sewage outlet of the single-core filter (201) is connected through pipelines to the inlet of the double-core filter (202), and the inlet of a circulation pump (23) and the sixth control valve (36) are both connected through pipelines to the sewage outlet of the double-core filter (202).

3. A CCRO high-efficiency water treatment system according to claim 1, characterized in that: The outlets of the water supply pump (11) and the water production pool (25) are both arranged at the bottom, and the bottoms of the water supply pump (11) and the water production pool (25) are both conical structures.

4. A CCRO high-efficiency water treatment system according to claim 1, characterized in that: The antiscalant injection module (12), the sodium bisulfite injection module (13), and the bactericide injection module (14) all comprise a liquid storage tank (51) for storing a solvent, a first check valve (52) arranged in the liquid storage tank (51), a diaphragm metering pump (53) connected to the first check valve (52) via a pipeline, and an injection valve (54) connected to the diaphragm metering pump (53) via a pipeline. The antiscalant injection module (12) is connected between the water supply pump (11) and the static mixer (16) via a pipeline of the injection valve (54), the sodium bisulfite injection module (13) is connected between the static mixer (16) and the safety filter (15) via a pipeline of the injection valve (54), and the bactericide injection module (14) is connected between the safety filter (15) and the high-pressure pump (21) via a pipeline of the injection valve (54).

5. A CCRO high-efficiency water treatment system according to claim 1, characterized in that: Manual valves (18) are provided on the pipeline between the sewage pool (10) and the water supply pump (11), on the pipeline between the static mixer (16) and the safety filter (15), and on the pipeline between the fourth control valve (34) and the concentration device (26).

6. A CCRO high-efficiency water treatment system according to claim 1, characterized in that: A second check valve (28) is connected to the outlet of the high-pressure pump (21), the outlet of the cleaning pump (24), the pipeline between the third control valve (33) and the inlet of the reverse osmosis membrane assembly (20), and the pipeline between the reaction tank (22) and the inlet of the reverse osmosis membrane assembly (20).

7. A CCRO high-efficiency water treatment system according to claim 2, characterized in that: Sampling valves (29) are provided on the pipeline between the outlet of the single-core filter (201) and the inlet of the water production pool (25), on the pipeline between the outlet of the double-core filter (202) and the inlet of the water production pool (25), and on the pipeline between the fourth control valve (34) and the concentrating device (26).

8. A CCRO high-efficiency water treatment system according to claim 1, characterized in that: A sewage return pipe (27) is also connected between the concentration device (26) and the reaction tank (22).

9. A working method of a CCRO high-efficiency water treatment system, applied to a CCRO high-efficiency water treatment system according to any one of claims 1 to 8, characterized in that: The steps include: Step 1, setting an air circuit control system and an electric circuit control system, wherein the first control valve (31), the second control valve (32), the third control valve (33), the fourth control valve (34), the fifth control valve (35), the sixth control valve (36), the seventh control valve (37) and the eighth control valve (38) are all pneumatic control valves, the air circuit control system is provided with an air pump and a solenoid valve assembly (30) connected to the air pump, and the first control valve (31), the second control valve (32), the third control valve (33), the fourth control valve (34), the fifth control valve (35), the sixth control valve (36), the seventh control valve (37) and the eighth control valve (38) are pneumatically connected to the air pump via the solenoid valve assembly (30); The circuit control system is provided with a control panel (61), a central control module (60), a redox potential transmitter (62), a conductivity transmitter (63), a flow transmitter (64), a pressure transmitter (65), and a differential pressure transmitter (66); the control panel (61), the redox potential transmitter (62), the conductivity transmitter (63), the flow transmitter (64), the pressure transmitter (65), the differential pressure transmitter (66), the solenoid valve assembly (30), the antiscalant injection module (12), the sodium bisulfite injection module (13), the bactericide injection module (14), the water supply pump (11), the high-pressure pump (21), the circulation pump (23), and the cleaning pump (24) are all electrically connected to the central control module (60) respectively; The redox potential transmitter (62) is arranged at the outlet of the static mixer (16), the conductivity transmitter (63) is connected to the pipeline between the circulation pump (23) and the second control valve (32), the flow transmitter (64) and the pressure transmitter (65) are both connected to the sewage outlet of the reverse osmosis membrane assembly (20) by pipeline, and the differential pressure transmitter (66) is connected to the inlet and outlet of the reverse osmosis membrane assembly (20) by pipeline; Step 2, setting a system program, burning the program into the central control module (60), in which a first pressure difference value and a second pressure difference value are set to be compared with the value collected by the pressure difference transmitter (66); then, according to the sewage treatment requirements, the maximum conductivity value, the minimum conductivity value, the concentrated conductivity value, the circulating water flow value, the concentrated water flow value, the circulating water pressure value and the concentrated water pressure value are pre-set in the program burned into the central control module (60) through the control panel (61) based on the conductivity transmitter (63), the flow transmitter (64) and the pressure transmitter (65); Step 3, sewage treatment, sewage treatment runs the following steps: Step 3.1, non-permeable sewage supply: operate the water supply pump (11), and open the eighth control valve (38) to allow the sewage in the sewage pool (10) to flow into the reaction pool (22); during this process, the central control module (60) detects the oxidation-reduction potential of the sewage flowing out of the static mixer (16) through the oxidation-reduction potential transmitter (62), thereby controlling the sodium bisulfite injection module (13) to inject appropriate sodium bisulfite to ensure the stability of water quality and the treatment effect in the subsequent treatment process; Step 3.2, circulation reaction: the circulation pump (23) is running, the seventh control valve (37) is closed, and the second control valve (32) is opened, so that a sewage circulation system is formed between the circulation pump (23), the reverse osmosis membrane assembly (20) and the reaction tank (22). At the same time, the water flow rate and water pressure in the sewage circulation system are detected by the flow transmitter (64) and the pressure transmitter (65), so as to adjust the eighth control valve (38), the water supply pump (11) and the circulation pump (23) so that the sewage circulation system is kept at the set circulation water flow rate value and circulation water pressure value for reaction; Step 3.3, sewage filtration: when the conductivity transmitter (63) detects that the conductivity in the sewage circulation system drops to a preset minimum conductivity value, the high-pressure pump (21) is operated, and the seventh control valve (37) and the first control valve (31) are opened, so that the pressure value in the sewage circulation system is increased to an osmotic pressure value at which water can pass through the reverse osmosis membrane assembly (20), thereby filtering clean water from the outlet of the reverse osmosis membrane assembly (20) and flowing to the water production pool (25), until the conductivity transmitter (63) detects that the conductivity in the sewage circulation system rises to a preset maximum conductivity value, the high-pressure pump (21) is stopped, so that the pressure value in the sewage circulation system drops to a value lower than the osmotic pressure value at which water can pass through the reverse osmosis membrane assembly (20), and the circulation reaction continues; Step 3.4, system maintenance: During the sewage filtration stage, the central control module (60) compares the pressure difference value with the preset first pressure difference value through the pressure difference transmitter (66). When the pressure difference value between the inlet and outlet of the reverse osmosis membrane assembly (20) collected by the pressure difference transmitter (66) reaches the preset first pressure difference value, the antiscalant injection module (12) and the bactericide injection module (14) are controlled to inject a certain amount of antiscalant and bactericide to remove the scale and biofilm attached to the reverse osmosis membrane assembly (20); after a certain period of time, the pressure difference transmitter (66) collects the pressure difference value. When the pressure difference value obtained is not lower than the second pressure difference value, the high-pressure pump (21) is stopped, the seventh control valve (37) and the second control valve (32) are closed, the cleaning pump (24) is operated, the third control valve (33), the fifth control valve (35) and the sixth control valve (36) are opened, and the reverse osmosis membrane assembly (20) is cleaned with clean water in the water production tank (25). After cleaning for a certain period of time, the sixth control valve (36) is closed, the second control valve (32) is opened, the clean water after cleaning is transferred to the reaction tank (22), and then the cleaning pump (24) and the fifth control valve (35) are closed to continue the circulation reaction.

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