Small membrane type stage treatment water recycling system and control method thereof

Abstract

The invention relates to the technical field of water treatment and membrane separation, and discloses a small membrane type stage treatment water recycling system and a control method thereof.The control method comprises the steps that rainwater and sewage are controlled to be conveyed to a water storage tank based on rainwater level data, sewage flow data, a preset low water level threshold value and a preset sewage discharge flow threshold value; based on the collected water level data, the collected water quality data and a preset membrane treatment system starting water level range, planning a staged treatment process of a membrane treatment module and adjusting the water inlet flow of membrane staged treatment; controlling the operation of a membrane processing module based on the water level data in the water purification tank and a preset water purification tank full water level threshold value; and adjusting a water supply mode based on the water quality data in the water purification tank, the water use demand of the water use point and a preset water quality standard threshold value. The problems of extensive rainwater treatment, low sewage treatment efficiency and high cost can be solved, and efficient cyclic utilization and reliable supply of an assembly type intelligent micro-space water source are achieved.

Description

Technical Field

[0001] The present invention relates to the technical fields of water treatment and membrane separation, and in particular, to a small-scale membrane-type hierarchical water circulation utilization system and a control method thereof. Background Art

[0002] In recent years, the development of prefabricated buildings has been changing with each passing day, especially the development of movable micro-spaces has rapidly occupied major scenarios such as parks, stadiums, office buildings, and tourist attractions. With the gradual increase in people's various demands for public area spaces and the development of the intelligent movable outdoor micro-space market, the demand for improving the environmental system of prefabricated intelligent micro-spaces is becoming increasingly strong. The environmental system of prefabricated intelligent micro-spaces mainly includes three major parts: air, water source, and power source, among which the importance of the water source occupies a major position. The existing water source supply for prefabricated intelligent micro-spaces mainly relies on increasing the volume of water storage tanks and manual water supply. When there is no water source supply in remote outdoor areas, it will consume manpower and increase the use cost. Therefore, the water circulation utilization system is the key to solving the current water supply problem of prefabricated intelligent micro-spaces.

[0003] Traditional water circulation utilization systems usually consist of two parts: a rainwater collection system and a sewage treatment system. Many prefabricated buildings have adopted rainwater collection systems to store and reuse rainwater, such as for flushing toilets and watering plants. This method can not only reduce the dependence on the public water supply system but also save natural resources. For example, some advanced prefabricated building projects have rationally designed rainwater collection and purification systems to use the collected rainwater for non-drinking purposes inside the building, greatly improving the utilization efficiency of water resources. However, the rainwater is not refined after collection, resulting in the inability to use this part of the water source normally and causing water source waste. And in the sewage treatment system, although some existing treatment methods are reused after filtration through an activated carbon layer, there are problems such as a short service life of the activated carbon layer and unsatisfactory filtration effect. Moreover, in the sewage treatment process, there are cumbersome steps such as anaerobic tanks, anoxic tanks, aerobic tanks, and disinfection tanks in sequence, which increase the difficulty of sewage treatment, increase the floor space for sewage treatment, and increase the production cost and operation and maintenance cost of prefabricated intelligent micro-spaces. The membrane method sewage treatment technology is an efficient sewage treatment method that combines biological treatment and membrane separation technology. This technology realizes the efficient treatment and recycling of sewage through a membrane bioreactor (MBR). The MBR technology maintains the microbial quantity in the biological reaction tank at a certain concentration, and through the efficient separation function of the membrane, converts sewage into recycled water resources superior to the surface water class IV standard, realizing the recycling of urban sewage. However, the floor area and use cost of the membrane bioreactor do not match those of prefabricated intelligent spaces.

[0004] In view of this, it is necessary to develop a small-scale membrane-type hierarchical treatment water circulation utilization system and its control method, which can overcome the problems in the prior art such as rough rainwater treatment, complex and inefficient sewage treatment, high cost, and difficult water supply in remote areas, and realize the efficient circulation utilization and reliable supply of assembled intelligent micro-space water sources. Summary of the Invention

[0005] In view of this, the present invention provides a small-scale membrane-type hierarchical treatment water circulation utilization system and its control method, aiming to provide a control method for small-scale membrane-type hierarchical treatment water circulation utilization, so as to overcome the problems in the prior art such as rough rainwater treatment, complex and inefficient sewage treatment, high cost, and difficult water supply in remote areas, and realize the efficient circulation utilization and reliable supply of assembled intelligent micro-space water sources.

[0006] On the one hand, the present invention provides a control method for small-scale membrane-type hierarchical treatment water circulation utilization, including:

[0007] Real-time monitoring of the rainwater level data of the rainwater collection module and the sewage flow data of the sewage collection module;

[0008] Based on the rainwater level data, sewage flow data, and preset low water level threshold and sewage discharge flow threshold, controlling the conveyance of rainwater and sewage to the water storage tank;

[0009] Real-time monitoring of the collected water level data and collected water quality data in the water storage tank, and planning the hierarchical treatment process of the membrane treatment module and adjusting the influent flow rate of membrane hierarchical treatment based on the collected water level data, collected water quality data, and preset membrane treatment system startup water level range;

[0010] Collecting the water after membrane hierarchical treatment into the clean water tank and real-time collecting the water level data in the clean water tank;

[0011] Based on the water level data in the clean water tank and the preset full water level threshold of the clean water tank, controlling the operation of the membrane treatment module;

[0012] Real-time monitoring of the water quality data in the clean water tank, and adjusting the water supply method based on the water quality data in the clean water tank, the water use demand of the water use point, and the preset water quality standard threshold;

[0013] Automatically starting membrane cleaning and water tank cleaning based on the system operation time, water quality data in the clean water tank, and system operation status.

[0014] Furthermore, the process of controlling the conveyance of rainwater and sewage to the water storage tank based on the rainwater level data, sewage flow data, and preset low water level threshold and sewage discharge flow threshold includes:

[0015] When the rainwater level data reaches the preset low water level threshold, controlling the conveyance of rainwater to the water storage tank;

[0016] When the sewage flow data reaches the sewage discharge flow threshold, control the sewage to be transported to the storage tank.

[0017] Furthermore, the process of planning the hierarchical treatment process of the membrane treatment module and adjusting the influent flow rate of the membrane hierarchical treatment based on the collected water level data, collected water quality data, and the preset starting water level range of the membrane treatment system includes:

[0018] When the water level data in the storage tank reaches the preset starting water level range of the membrane treatment system, plan the hierarchical treatment process of the membrane treatment module based on the collected water quality data;

[0019] Among them, when planning the hierarchical treatment process of the membrane treatment module based on the collected water quality data:

[0020] Real-time monitor the turbidity data and sewage pollutant content data of the collected water, and select the membrane hierarchical treatment level based on the preset turbidity range and sewage pollutant content range;

[0021] If the turbidity data of the collected water is greater than the preset turbidity range or the sewage pollutant content data is greater than the sewage pollutant content range, select primary microfiltration treatment;

[0022] If the turbidity data of the collected water is within the preset turbidity range and the sewage pollutant content data is within the sewage pollutant content range, select secondary ultrafiltration treatment;

[0023] If the turbidity data of the collected water is less than the preset turbidity range and the sewage pollutant content data is less than the sewage pollutant content range, select tertiary nanofiltration treatment;

[0024] When the water level data in the storage tank does not reach the preset starting water level range of the membrane treatment system, continue to collect rainwater and sewage and real-time monitor the water level data in the storage tank.

[0025] Furthermore, the process of planning the hierarchical treatment process of the membrane treatment module and adjusting the influent flow rate of the membrane hierarchical treatment based on the collected water level data, collected water quality data, and the preset starting water level range of the membrane treatment system also includes:

[0026] Based on the collected water level data and collected water quality data, preliminarily determine the influent flow rate of the membrane hierarchical treatment;

[0027] If the collected water level data exceeds the starting water level range of the membrane treatment system and the sewage pollutant content data is less than the sewage pollutant content range, increase the influent flow rate of the membrane hierarchical treatment;

[0028] If the collected water level data is less than the starting water level range of the membrane treatment system or the sewage pollutant content data exceeds the sewage pollutant content range, decrease the influent flow rate of the membrane hierarchical treatment.

[0029] Further, when controlling the operation of the membrane treatment module based on the water level data in the clean water tank and a preset full water level threshold of the clean water tank, when the water level data in the clean water tank reaches the preset full water level threshold of the clean water tank, the operation of the membrane treatment module is controlled to stop;

[0030] Among them, during the process of controlling the membrane treatment module to stop running:

[0031] If there are unfinished treatment steps in the membrane treatment module, when the remaining treatment time of this step is less than the preset treatment duration, it continues to complete this step and then stops; when the remaining treatment time exceeds the preset treatment duration, it stops directly and records relevant data;

[0032] After the membrane treatment module stops running, if the water level data in the clean water tank drops to the preset net water volume value within a short time, and the water collection water level data in the storage tank reaches the membrane treatment system startup water level range, it is determined whether to immediately start the membrane treatment module based on the system operation situation.

[0033] Further, the process of real-time monitoring of the water quality data in the clean water tank and adjusting the water supply method based on the water quality data in the clean water tank, the water use demand of the water use point, and a preset water quality standard threshold includes:

[0034] When the water quality data in the clean water tank reaches the preset water quality standard threshold and there is a water use demand at the water use point, it supplies water in a conventional water supply method and adjusts the flow of the flow valve according to the water use demand;

[0035] When the water quality data in the clean water tank does not reach the preset water quality standard threshold, but there is a water use demand at the water use point, it switches to an alternative water supply method.

[0036] Further, when the water quality data in the clean water tank does not reach the preset water quality standard threshold, but there is a water use demand at the water use point, the process of switching to an alternative water supply method includes:

[0037] Classify the alternative water supply methods;

[0038] Record different situations presented by the deviation of the water quality data in the clean water tank from the preset water quality standard threshold for different categories;

[0039] Select the corresponding alternative water supply method based on the different situations;

[0040] After switching the water supply method, if the water use point feedbacks that the water use effect is not good, when the number of feedbacks reaches the preset feedback quantity, the alternative water supply method is re-matched based on the water quality data in the clean water tank.

[0041] Further, the process of automatically starting membrane cleaning and water tank cleaning based on the system operation time, the water quality data in the clean water tank, and the system operation status includes:

[0042] When the system running time reaches the preset running duration and the water quality data in the clean water tank is lower than the preset minimum water quality standard value or the system running state is abnormal, the membrane cleaning and the water tank cleaning are automatically started.

[0043] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0044] The present invention monitors the rainwater level data and the sewage flow data in real time, and controls the transportation according to the preset threshold values, which can ensure that the transportation is carried out only when the rainwater reaches a certain amount and the sewage is generated to an appropriate degree, avoid the waste of rainwater and the unreasonable discharge of sewage, improve the collection rate of rainwater and sewage, and make more efficient use of water resources.

[0045] This application can select an appropriate membrane treatment level according to the water quality data, and can also adjust the flow rate according to the water level, improving the treatment pertinence, the overall efficiency and the water quality of the effluent, enabling the recycled water to meet the water use requirements of the non-drinking scenarios in the assembled intelligent micro-space, and reducing the dependence on external water sources.

[0046] This application monitors the water quality data of the clean water tank in real time, and adjusts the water supply mode according to the water quality, the water use requirements and the standard threshold values. It can meet different water use requirements, ensure the water supply quality and reliability, and improve the user experience.

[0047] This application automatically starts the membrane cleaning and the water tank cleaning, greatly reducing the operation and maintenance costs and the intensity of manual operation, and improving the reliability and adaptability of the system.

[0048] On the other hand, the present invention also proposes a small-scale membrane type hierarchical treatment water recycling system, including: a control module, a rainwater collection module, a sewage collection module, a storage tank, a membrane treatment module, a clean water tank and a cleaning module;

[0049] The rainwater collection module is used to collect the roof rainwater and transport the collected rainwater to the storage tank;

[0050] The sewage collection module is used to collect the indoor sewage and transport the collected sewage to the storage tank;

[0051] The storage tank is used to store the collected rainwater and sewage;

[0052] The membrane treatment module is used to perform membrane hierarchical treatment on the collected rainwater and sewage, and transport the rainwater and sewage after the membrane hierarchical treatment to the clean water tank;

[0053] The clean water tank is used to store the rainwater and sewage after the membrane hierarchical treatment;

[0054] The cleaning module is used to clean the storage tank, the membrane treatment module and the clean water tank;

[0055] The control module is respectively connected to the rainwater collection module, the sewage collection module, the water storage tank, the membrane treatment module, the clean water tank and the cleaning module, and controls the operation of the rainwater collection module, the sewage collection module, the water storage tank, the membrane treatment module, the clean water tank and the cleaning module.

[0056] Furthermore, the control module includes a data detection unit and a backup water supply device;

[0057] The data detection unit is used to monitor in real time the rainwater level data of the rainwater collection module, the sewage flow data of the sewage collection module, the collected water level data and the collected water quality data in the water storage tank, as well as the water level data and water quality data in the clean water tank; the backup water supply device is used to provide a backup water supply method;

[0058] The rainwater collection module includes a rainwater pump and a roof gutter;

[0059] The sewage collection module includes a washbasin, a shower pool and a sewage valve.

[0060] It can be understood that the above-mentioned various embodiments of the present invention, a small-scale membrane type hierarchical treatment water circulation utilization system and its control method have the same beneficial effects, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0062] Figure 1 is a flowchart of a control method for a small-scale membrane type hierarchical treatment water circulation utilization provided by an embodiment of the present invention;

[0063] Figure 2 is a functional block diagram of a small-scale membrane type hierarchical treatment water circulation utilization system provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0064] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. Hereinafter, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments.

[0065] Traditional water recycling systems usually consist of two parts: a rainwater collection system and a sewage treatment system. Many prefabricated buildings use rainwater collection systems to store and reuse rainwater, such as for flushing toilets and watering plants. This method can not only reduce dependence on public water supply systems, but also save natural resources. For example, some advanced prefabricated building projects use the collected rainwater for non-drinking purposes inside the building by rationally designing rainwater collection and purification systems, which greatly improves the utilization efficiency of water resources. However, the rainwater is not finely treated after collection, which makes it impossible to use this part of the water source normally, resulting in water waste. Although some existing treatment methods in the sewage treatment system are reused after filtering through the activated carbon layer, there are problems such as short service life of the activated carbon layer and unsatisfactory filtering effect. Moreover, the cumbersome steps of anaerobic tanks, anoxic tanks, aerobic tanks and disinfection tanks in the sewage treatment process increase the difficulty of sewage treatment, increase the space occupied by sewage treatment, and increase the production cost and operation and maintenance cost of prefabricated intelligent micro-spaces. Membrane sewage treatment technology is an efficient sewage treatment method that combines biological treatment and membrane separation technology. This technology achieves efficient treatment and recycling of sewage through membrane bioreactor (MBR). MBR technology maintains the amount of microorganisms in the biological reaction pool at a certain concentration, and through the efficient separation of the membrane, it converts sewage into recycled water resources that are better than the Class IV surface water standard, thus achieving the recycling of urban sewage. However, the floor space and use cost of membrane bioreactors are not compatible with prefabricated intelligent spaces.

[0066] Therefore, the development of a small-scale membrane-type graded water treatment recycling system and its control method can overcome the problems of extensive rainwater treatment, complex and inefficient sewage treatment, high cost, and difficulty in water supply in remote areas in the existing technology, and realize the efficient recycling and reliable supply of assembled intelligent micro-space water sources, which is of great practical significance.

[0067] Reference Figure 1 In some embodiments of the present application, a small-scale membrane-type graded water recycling control method includes:

[0068] S1, real-time monitoring of rainwater level data of the rainwater collection module and sewage flow data of the sewage collection module;

[0069] S2, controlling the delivery of rainwater and sewage to the water storage tank based on the rainwater level data, sewage flow data, and a preset low water level threshold and sewage discharge flow threshold;

[0070] S3, real-time monitoring of the water level data and water quality data in the water storage tank, based on the water level data, water quality data and the preset membrane treatment system to start the water level range to plan the graded treatment process of the membrane treatment module and adjust the water inlet flow of the membrane graded treatment;

[0071] S4. Collect the water collected after membrane grading into a clean water tank and collect the water level data in the clean water tank in real time;

[0072] S5. Control the operation of the membrane treatment module based on the water level data in the clean water tank and the preset full water level threshold of the clean water tank;

[0073] S6. Monitor the water quality data in the clean water tank in real time, and adjust the water supply mode based on the water quality data in the clean water tank, the water use demand of the water use point, and the preset water quality standard threshold;

[0074] S7. Automatically start membrane cleaning and water tank cleaning based on the system operation time, the water quality data in the clean water tank, and the system operation status.

[0075] Specifically, the rainwater collection module collects roof rainwater, and the sewage collection module collects domestic sewage through washbasins and shower pools.

[0076] It can be understood that by monitoring the rainwater level data in real time, the dynamic change of the rainwater collection volume can be grasped in time, so as to reasonably arrange the rainwater transportation according to the water level situation subsequently, and improve the efficiency of rainwater collection and utilization. By monitoring the sewage flow data in real time, the rate of sewage generation can be accurately known, providing a basis for controlling the sewage transportation timing and ensuring the timeliness of sewage collection and treatment.

[0077] Specifically, when the rainwater level data reaches the preset low water level threshold, control the rainwater pump in the rainwater collection module to start and transport the rainwater to the storage tank; when the sewage flow data reaches the sewage discharge flow threshold, control the sewage valve of the sewage collection module to open and make the sewage flow into the storage tank. In this way, rainwater and sewage can be reasonably collected and stored.

[0078] It can be understood that controlling the rainwater transportation based on the water level threshold can ensure that the rainwater is collected in time when it reaches a certain amount, avoid waste of rainwater, and at the same time ensure a continuous and stable rainwater source for the storage tank. Controlling the sewage transportation based on the sewage flow threshold can effectively grasp the sewage discharge timing, prevent excessive accumulation of sewage in the collection module, and ensure that the storage tank can receive sewage in a timely manner for subsequent treatment.

[0079] Specifically, monitor the water level data of the collected water in real time and detect various water quality indicators of the collected water. Through the real-time monitoring of the turbidity data of the collected water and the sewage pollutant content data, select the membrane grading treatment level according to the preset turbidity range and sewage pollutant content range, determine whether to use primary microfiltration treatment, secondary ultrafiltration treatment or tertiary nanofiltration treatment, and preliminarily determine the inlet flow rate of the membrane grading treatment according to the collected water level data and the collected water quality data.

[0080] It can be understood that by monitoring the water level and water quality data in the water storage tank in real time, the membrane treatment process can be reasonably planned and the influent flow rate can be adjusted according to the actual situation, enabling the membrane treatment module to efficiently treat different water qualities and water volumes, improving the pertinence and efficiency of the treatment, and ensuring the treatment effect.

[0081] Specifically, the water level data in the clean water tank and the water quality data in the clean water tank are collected in real time. When the water level data in the clean water tank reaches the preset full water level threshold of the clean water tank, the control module controls the membrane treatment module to stop operating.

[0082] It can be understood that by monitoring the water level and water quality of the clean water tank in real time and controlling the operation of the membrane treatment module according to the water level, system idling and waste of water resources due to overflow can be avoided.

[0083] It can be seen that by adjusting the water supply mode according to the water quality and water use requirements, the stability and reliability of the water supply are ensured, and the water use requirements in different situations are met.

[0084] It can be seen that by automatically starting cleaning according to the system operation time, water quality and status, impurities and pollutants in the equipment can be removed in time, preventing equipment blockage and performance degradation, extending the service life of the equipment, maintaining the long-term stable and efficient operation of the system, and reducing the cost and workload of frequent manual inspections and maintenance.

[0085] Refer to Figure 1 , in some embodiments of the present application, the process of planning the hierarchical treatment process of the membrane treatment module and adjusting the influent flow rate of the membrane hierarchical treatment based on the collected water level data, collected water quality data, and the preset membrane treatment system startup water level range includes:

[0086] When the water level data in the water storage tank reaches the preset membrane treatment system startup water level range, the hierarchical treatment process of the membrane treatment module is planned based on the collected water quality data; when the water level data in the water storage tank does not reach the preset membrane treatment system startup water level range, rainwater and sewage are continuously collected and the water level data in the water storage tank is monitored in real time.

[0087] Specifically, when planning the hierarchical treatment process of the membrane treatment module based on the collected water quality data:

[0088] The turbidity data of the collected water and the sewage pollutant content data are monitored in real time, and the membrane hierarchical treatment level is selected based on the preset turbidity range and sewage pollutant content range.

[0089] Specifically, if the turbidity data of the collected water is greater than the preset turbidity range or the sewage pollutant content data is greater than the sewage pollutant content range, primary microfiltration treatment is selected; if the turbidity data of the collected water is within the preset turbidity range and the sewage pollutant content data is within the sewage pollutant content range, secondary ultrafiltration treatment is selected; if the turbidity data of the collected water is less than the preset turbidity range and the sewage pollutant content data is less than the sewage pollutant content range, tertiary nanofiltration treatment is selected.

[0090] It can be understood that when the water quality is poor, primary microfiltration treatment is selected. The primary microfiltration treatment uses a microfiltration membrane with a relatively large pore size, which can effectively remove large particulate impurities, protect the subsequent membrane treatment components from being blocked or damaged by large particulate matter, improve the overall service life of the membrane treatment module, and at the same time preliminarily purify the water quality to lay a foundation for subsequent treatment.

[0091] It can be understood that when the water quality is at a medium level, secondary ultrafiltration treatment is selected. The ultrafiltration membrane has a smaller pore size than the microfiltration membrane, which can further filter out smaller particulate impurities, bacteria, viruses and other pollutants, further improve the water quality, meet the water use requirements with relatively high water quality requirements, and reasonably utilize the advantages of different membrane treatment levels to improve the treatment efficiency and effect.

[0092] It can be understood that when the water quality is good, tertiary nanofiltration treatment is selected. The nanofiltration membrane can perform more refined filtration on the collected water, remove smaller molecular pollutants and some ions, can deeply purify the water quality, meet the domestic water use requirements with extremely high water quality requirements, give full play to the function of the membrane treatment module, and improve the utilization value of water resources.

[0093] It can be understood that when the water level data in the storage tank does not reach the preset membrane treatment system startup water level range, the rainwater collection module and the sewage collection module continue to work, continuously collect rainwater and sewage, and at the same time monitor the water level data in the storage tank in real time, and wait for the water level to reach the appropriate range before starting the hierarchical treatment process of the membrane treatment module.

[0094] It can be seen that continuous collection and monitoring are carried out when the water level does not reach the startup range, avoiding the low treatment efficiency or energy waste caused by the startup of the membrane treatment module when the water volume is insufficient, ensuring that the treatment process is started in time when there is enough water volume, and maintaining the stable operation of the system.

[0095] Refer to Figure 1 , in some embodiments of the present application, in the process of planning the hierarchical treatment process of the membrane treatment module and adjusting the influent flow rate of the membrane hierarchical treatment based on the collected water level data, the collected water quality data, and the preset membrane treatment system startup water level range, it further includes: preliminarily determining the influent flow rate of the membrane hierarchical treatment based on the collected water level data and the collected water quality data.

[0096] It can be understood that after determining the hierarchical treatment process of the membrane treatment module, an initial influent flow rate value is calculated through a specific algorithm based on the current water level height and general water quality situation in the water storage tank, combined with factors such as the treatment capacity of the membrane treatment module.

[0097] Specifically, if the collected water level data exceeds the startup water level range of the membrane treatment system and the sewage pollutant content data is less than the sewage pollutant content range, the influent flow rate of the membrane hierarchical treatment is increased; if the collected water level data is less than the startup water level range of the membrane treatment system or the sewage pollutant content data exceeds the sewage pollutant content range, the influent flow rate of the membrane hierarchical treatment is decreased.

[0098] It can be understood that when there is sufficient water volume and good water quality in the water storage tank, the membrane treatment module has greater treatment potential. Then, the influent flow rate of the membrane hierarchical treatment is appropriately increased to accelerate the treatment speed and improve the overall operation efficiency of the system. On the premise of ensuring the treatment effect, the water in the water storage tank is processed and transported to the clean water tank as soon as possible.

[0099] It can be seen that increasing the influent flow rate when the water volume is sufficient and the water quality is good can make full use of the treatment capacity of the membrane treatment module, shorten the treatment time, improve the system operation efficiency, meet the water use demand faster, and at the same time avoid unnecessary residence and waiting of water resources in the water storage tank, and improve the turnover efficiency of water resources.

[0100] It can be understood that when the current water volume is insufficient or the water quality is poor, the membrane treatment module may face the risks of greater treatment pressure or poor treatment effect. At this time, the influent flow rate of the membrane hierarchical treatment is decreased to protect the membrane treatment module, prevent excessive loss of the membrane module due to excessive water volume or poor water quality, extend the service life of the membrane treatment module, and at the same time ensure the stable operation of the membrane treatment module and ensure that the treated water quality can meet the basic requirements.

[0101] It can be seen that decreasing the influent flow rate when the water volume is insufficient or the water quality is poor can effectively protect the membrane treatment module, reduce membrane damage caused by improper flow rate, reduce the equipment replacement and maintenance costs, and at the same time ensure the stable operation of the membrane treatment module and maintain the basic ability of the system to treat water quality.

[0102] Refer to Figure 1 , in some embodiments of the present application, when controlling the operation of the membrane treatment module based on the water level data in the clean water tank and the preset full water level threshold of the clean water tank, when the water level data in the clean water tank reaches the preset full water level threshold of the clean water tank, the membrane treatment module is controlled to stop operating.

[0103] Specifically, during the process of controlling the membrane treatment module to stop running: If there are unfinished treatment steps in the membrane treatment module, when the remaining treatment time of this step is less than the preset treatment duration, then continue to complete this step and then stop; when the remaining treatment time exceeds the preset treatment duration, directly stop and record relevant data;

[0104] Specifically, after the membrane treatment module stops running, if the water level data in the clean water tank drops to the preset clean water volume value within a short period of time, and the water collection level data in the storage tank reaches the startup water level range of the membrane treatment system, determine whether to immediately start the membrane treatment module based on the system operation conditions; when the data feedback by the water level sensor in the clean water tank shows that the water level reaches the preset full water level threshold of the clean water tank, the control module immediately sends a stop running instruction to the membrane treatment module.

[0105] It can be understood that when the remaining treatment time is short, continue to complete the step to ensure the integrity of the membrane treatment process, avoid unqualified water quality treatment caused by sudden stop, ensure that the finally treated water quality meets the requirements, and improve the reliability of the system for treating water quality. When the remaining treatment time exceeds the preset treatment duration, directly stop running the membrane treatment module and record relevant data such as the current treatment status, such as recording the current step being processed, the operating parameters of the membrane module, etc. These recorded data can provide a reference basis for subsequent analysis of the operation of the membrane treatment module, troubleshooting, and resuming treatment, etc.

[0106] It can be seen that when the remaining treatment time is too long, directly stop and record the data, which can timely avoid unnecessary operation of the membrane treatment module, save energy, and at the same time provide detailed data for subsequent maintenance and troubleshooting, facilitating quick positioning and solving problems, and improving the maintainability of the system.

[0107] It can be understood that the control module will comprehensively consider the current operation conditions of the system, such as whether there are potential faults in the membrane treatment module, whether the working status of other modules is normal, etc., to determine whether to immediately start the membrane treatment module. If the overall system runs normally and it is judged that it is necessary to supplement the water volume in the clean water tank in a timely manner, then start the membrane treatment module to ensure the stability and timeliness of water supply; if there are some abnormal situations in the system that need to be investigated or processed first, then delay starting the membrane treatment module and start it after the problem is solved.

[0108] It can be seen that according to the drop of the water level in the clean water tank and the water level situation in the storage tank, combined with the overall operation status of the system, determine whether to start the membrane treatment module, so that the system can flexibly adapt to the actual water use and water collection situation, avoid damage to the equipment caused by frequent startup and stop of the equipment, and at the same time ensure the stability and timeliness of water supply, and improve the reliability and stability of the system operation.

[0109] Refer to Figure 1, in some embodiments of the present application, the process of real-time monitoring of water quality data in the clean water tank and adjusting the water supply method based on the water quality data in the clean water tank, the water demand at the water usage point, and a preset water quality standard threshold includes: when the water quality data in the clean water tank reaches the preset water quality standard threshold and there is a water demand at the water usage point, water is supplied in the conventional water supply method, and the flow rate of the flow valve is adjusted according to the water demand; when the water quality data in the clean water tank does not reach the preset water quality standard threshold but there is a water demand at the water usage point, the standby water supply method is switched.

[0110] It can be understood that if the water usage point is a faucet in a resident's home for daily washing, a relatively small flow of water is required. The control module will adjust the flow valve to a relatively small opening to provide an appropriate amount of water; if it is a water usage point for greening irrigation within the community, a relatively large flow of water is required. The control module will correspondingly increase the opening of the flow valve to meet the irrigation demand. On the premise of ensuring water quality, the flow rate is reasonably adjusted to avoid waste of water resources.

[0111] It can be seen that when the water quality meets the standard and there is a water demand, by supplying water in the conventional water supply method and adjusting the flow rate as needed, it can not only meet the actual needs of different water usage points, but also avoid waste of water resources, improve the utilization efficiency of water resources, and at the same time ensure the stability and reliability of water supply.

[0112] It can be understood that when it is detected that the content of a certain pollutant in the water in the clean water tank exceeds the standard and does not meet the drinking requirements of residents, but the residents still have a water demand, the standby water supply pipeline is switched, and water is supplied from the standby water source to the water usage point to ensure that there is a water source supply at the water usage point under any circumstances, improve the safety and reliability of water supply, and avoid affecting the normal life of residents due to water quality problems.

[0113] It can be seen that when the water quality does not meet the standard, switching to the standby water supply method can effectively ensure the normal water use at the water usage point, avoid inconvenience in life due to water quality problems, and improve the emergency handling ability and reliability of the water supply system.

[0114] Refer to Figure 1 , in some embodiments of the present application, when the water quality data in the clean water tank does not reach the preset water quality standard threshold but there is a water demand at the water usage point, the process of switching to the standby water supply method includes:

[0115] Classify the standby water supply methods; record the different situations presented by the deviation of the water quality data in the clean water tank of different categories from the preset water quality standard threshold; select the corresponding standby water supply method based on the different situations; after switching the water supply method, if the water usage point feedbacks that the water use effect is not good, when the number of feedbacks reaches the preset feedback quantity, re-match the standby water supply method based on the water quality data in the clean water tank.

[0116] Specifically, it can be classified according to different water sources for backup water supply, such as municipal water supply, water supply from reserve water tanks within the community, etc.; it can also be classified according to characteristics such as the pressure and water quality of the water supply. For example, backup water supplies with stable pressure and relatively good water quality are classified into one category, and those with large pressure fluctuations and average water quality are classified into another category, etc.

[0117] It can be understood that classifying the backup water supply methods facilitates clear management and selection of appropriate backup water supply plans, and improves the flexibility and pertinence in dealing with situations of substandard water quality.

[0118] Specifically, based on the classification, when the microbial content in the water quality of the net water tank exceeds the standard, record the water usage effects and water quality changes under various backup water supply methods at this time; when the heavy metal content in the water exceeds the standard, record the corresponding data as well. By accumulating these data over a long period, establish the correlation between the deviation of the net water tank water quality and the effects of backup water supply methods.

[0119] It can be understood that recording the deviation of water quality data can provide detailed and accurate basis for subsequent selection of appropriate backup water supply methods, enabling the system to quickly find more suitable backup water supply plans according to different water quality problems, and improving the effects of backup water supply.

[0120] Specifically, when the water quality in the net water tank is only slightly turbid and indicators such as microorganisms basically meet the standards, select a backup water supply method with better turbidity treatment effect; when the heavy metal content in the water quality exceeds the standard severely, select a backup water supply method that can effectively filter heavy metals.

[0121] It can be seen that selecting backup water supply methods according to different water quality situations can meet the water quality and quantity requirements of water use points to the greatest extent, improve the pertinence and effectiveness of backup water supply, and ensure the normal water use experience of water use points.

[0122] It can be seen that re - matching the backup water supply method according to user feedback can timely discover and solve problems existing in the backup water supply method, continuously optimize the water supply plan, improve users' satisfaction with the water supply system, and enhance the practicability and adaptability of the water supply system.

[0123] Refer to Figure 1 , in some embodiments of the present application, based on the system operation time, the water quality data in the net water tank, and the system operation status, the process of automatically starting membrane cleaning and water tank cleaning includes: when the system operation time reaches the preset operation duration and the water quality data in the net water tank is lower than the preset minimum water quality standard value or the system operation status is abnormal, automatically start membrane cleaning and water tank cleaning.

[0124] Specifically, continuously record the system operation time, and simultaneously monitor the water quality data in the clean water tank and the system operation status. When the content of key pollutants in the water exceeds the allowed maximum value, or the system operation status is abnormal, such as the operation pressure of the membrane treatment module suddenly and abnormally increases, the equipment makes abnormal noises, etc., automatically start the membrane cleaning and water tank cleaning procedures.

[0125] It can be seen that automatic cleaning can timely remove the accumulated impurities and pollutants in the equipment, prevent the growth of pollutants in the storage water tank from affecting the water quality, restore the filtration performance of the membrane treatment module, ensure the cleanliness of the clean water tank, extend the service life of the equipment, maintain the efficient and stable operation of the system, reduce the workload and cost of frequent manual cleaning, and improve the automation level and reliability of the system.

[0126] It can be seen that the present invention monitors the rainwater level data and sewage flow data in real time, and controls the conveyance according to the preset threshold values, which can ensure that the conveyance is carried out only when the rainwater reaches a certain amount and the sewage is generated to an appropriate degree, avoid the waste of rainwater and the unreasonable discharge of sewage, improve the collection rate of rainwater and sewage, and make more efficient use of water resources.

[0127] This application can select the appropriate membrane treatment level according to the water quality data, and can also adjust the flow rate according to the water level, improving the treatment pertinence, overall efficiency and effluent water quality, enabling the recycled water to meet the water use requirements of the non-drinking scenarios in the assembled intelligent micro-space, and reducing the dependence on external water sources.

[0128] This application monitors the water quality data of the clean water tank in real time and adjusts the water supply mode according to the water quality, water use requirements and standard threshold values. It can meet different water use requirements, ensure the water supply quality and reliability, and improve the user experience.

[0129] This application automatically starts the membrane cleaning and water tank cleaning, greatly reducing the operation and maintenance costs and the intensity of manual operation, and improving the reliability and adaptability of the system.

[0130] In another preferred mode based on the above embodiments, refer to Figure 2 As shown, this embodiment provides a small-scale membrane-type hierarchical treatment water recycling system, including: a control module, a rainwater collection module, a sewage collection module, a storage water tank, a membrane treatment module, a clean water tank, and a cleaning module.

[0131] Specifically, the rainwater collection module is used to collect rainwater from the roof; the sewage collection module is used to collect indoor sewage; the water storage tank is used to store the collected rainwater and sewage; the membrane treatment module is used to perform membrane classification treatment on the collected rainwater and sewage; the purified water tank is used to store the rainwater and sewage after membrane classification treatment; the cleaning module is used to clean the water storage tank, the membrane treatment module and the purified water tank; the control module is respectively connected to the rainwater collection module, the sewage collection module, the water storage tank, the membrane treatment module, the purified water tank and the cleaning module, and controls the operation of the rainwater collection module, the sewage collection module, the water storage tank, the membrane treatment module, the purified water tank and the cleaning module.

[0132] Specifically, the purified water tank adopts a wall-embedded water tank, and the base of the water storage tank is a sunken groove sedimentation tank.

[0133] Refer to Figure 2 As shown, in some embodiments of the present application, the control module includes a data detection unit and a backup water supply device.

[0134] Specifically, the data detection unit is used to monitor in real time the rainwater level data of the rainwater collection module, the sewage flow data of the sewage collection module, the collected water level data and the collected water quality data in the water storage tank, as well as the water level data and water quality data in the purified water tank; the backup water supply device is used to provide a backup water supply method.

[0135] Specifically, the rainwater collection module includes a rainwater pump and a roof gutter; the sewage collection module includes a washbasin, a shower pool and a sewage valve.

[0136] It can be understood that in the above embodiments of the present invention, a small membrane type classification treatment water circulation utilization system and its control method have the same beneficial effects, which will not be elaborated here.

[0137] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system or a computer program product. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0138] This application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, as well as the combination of flows and / or blocks in the flowchart and / or block diagram. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in one or more flows Figure 1 one or more flows and / or blocks Figure 1 or a plurality of blocks.

[0139] These computer program instructions can also be stored in a computer-readable memory capable of guiding a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means, and the instruction means implements the functions specified in one or more flows Figure 1 one or more flows and / or blocks Figure 1 or a plurality of blocks.

[0140] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more flows Figure 1 one or more flows and / or blocks Figure 1 or a plurality of blocks.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific embodiments of the present invention can still be modified or equivalently replaced, and any modification or equivalent replacement without departing from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A small-scale membrane-type graded water recycling control method, characterized in that: Real-time monitoring of rainwater level data of rainwater collection module and sewage flow data of sewage collection module; Controlling the delivery of rainwater and sewage to the water storage tank based on the rainwater level data, sewage flow data, and a preset low water level threshold and sewage discharge flow threshold; Real-time monitoring of water level data and water quality data in the water storage tank, and planning of the graded treatment process of the membrane treatment module and adjustment of the water inlet flow of the membrane graded treatment based on the water level data, water quality data and a preset membrane treatment system start-up water level range; Collect the collected water after membrane grading treatment into the clean water tank and collect the water level data in the clean water tank in real time; Controlling the operation of the membrane processing module based on the water level data in the clean water tank and a preset full water level threshold of the clean water tank; Real-time monitoring of water quality data in the clean water tank, and adjusting the water supply mode based on the water quality data in the clean water tank, the water demand of the water use point, and the preset water quality standard threshold; Automatically start membrane cleaning and water tank cleaning based on system operating time, water quality data in the clean water tank and system operating status.

2. A small-scale membrane-type graded water recycling control method according to claim 1, characterized in that: The process of controlling the delivery of rainwater and sewage to the water storage tank based on the rainwater level data, sewage flow data and the preset low water level threshold and sewage discharge flow threshold includes: When the rainwater level data reaches a preset low water level threshold, the rainwater is controlled to be transported to the water storage tank; When the sewage flow data reaches the sewage discharge flow threshold, the sewage is controlled to be transported to the water storage tank.

3. A small-scale membrane-type graded water recycling control method according to claim 2, characterized in that: The process of planning the graded treatment process of the membrane treatment module and adjusting the water inlet flow rate of the membrane graded treatment based on the water level data, the water quality data and the preset membrane treatment system startup water level range includes: When the water level data in the water storage tank reaches the preset membrane treatment system start-up water level range, the hierarchical treatment process of the membrane treatment module is planned based on the collected water quality data; Among them, when planning the hierarchical treatment process of the membrane treatment module based on the water quality data of the collected water: Monitor the turbidity data of the collected water and the pollutant content of the sewage in real time, and select the membrane grading treatment level based on the preset turbidity range and the pollutant content range of the sewage; If the turbidity data of the collected water is greater than the preset turbidity range or the sewage pollutant content data is greater than the sewage pollutant content range, the primary microfiltration treatment is selected; If the turbidity data of the collected water is within the preset turbidity range and the sewage pollutant content data is within the sewage pollutant content range, then the secondary ultrafiltration treatment is selected; If the turbidity data of the collected water is less than the preset turbidity range and the sewage pollutant content data is less than the sewage pollutant content range, the three-stage nanofiltration treatment is selected; When the water level data in the water tank does not reach the preset membrane treatment system start-up water level range, it continues to collect rainwater and sewage and monitor the water level data in the water tank in real time.

4. A small-scale membrane-type graded water recycling control method according to claim 3, characterized in that: The process of planning the hierarchical treatment process of the membrane treatment module and adjusting the water inlet flow of the membrane hierarchical treatment based on the water level data, the water quality data and the preset membrane treatment system startup water level range also includes: Preliminarily determine the water inlet flow rate for membrane grading treatment based on the water level data and water quality data; If the water level data exceeds the starting water level range of the membrane treatment system and the sewage pollutant content data is less than the sewage pollutant content range, the inlet flow rate of the membrane graded treatment is increased; If the water level data is lower than the starting water level range of the membrane treatment system or the sewage pollutant content data exceeds the sewage pollutant content range, the inlet flow rate of the membrane graded treatment is reduced.

5. A small-scale membrane-type graded water recycling control method according to claim 1, characterized in that: When the operation of the membrane processing module is controlled based on the water level data in the clean water tank and the preset full water level threshold of the clean water tank, when the water level data in the clean water tank reaches the preset full water level threshold of the clean water tank, the membrane processing module is controlled to stop operating; Among them, in the process of controlling the membrane treatment module to stop running: If there is an unfinished processing step in the membrane processing module, when the remaining processing time of the step is less than the preset processing time, the process will continue to complete the step and then stop; when the remaining processing time exceeds the preset processing time, the process will stop directly and record relevant data; After the membrane treatment module stops running, if the water level data of the clean water tank drops to the preset clean water volume value within a short period of time, and the water level data of the water storage tank reaches the starting water level range of the membrane treatment system, determine whether to start the membrane treatment module immediately based on the system operation status.

6. A small-scale membrane-type graded water recycling control method according to claim 1, characterized in that: The process of real-time monitoring of water quality data in the clean water tank and adjusting the water supply mode based on the water quality data in the clean water tank, the water demand of the water use point and the preset water quality standard threshold includes: When the water quality data in the clean water tank reaches the preset water quality standard threshold and there is water demand at the water point, water is supplied in a conventional way and the flow rate of the flow valve is adjusted according to the water demand; When the water quality data in the clean water tank does not meet the preset water quality standard threshold, but there is water demand at the water point, it switches to the backup water supply mode.

7. A small-scale membrane-type graded water recycling control method according to claim 6, characterized in that: When the water quality data in the clean water tank does not meet the preset water quality standard threshold, but there is water demand at the water point, the process of switching to the backup water supply mode includes: Categorize alternate water supply methods; Record the different situations in which water quality data in different types of clean water tanks deviate from the preset water quality standard thresholds; Selecting a corresponding backup water supply method based on the different situations; After switching the water supply method, if the water use point feedback shows that the water use effect is not good, when the number of feedbacks reaches the preset number of feedbacks, the backup water supply method will be re-matched based on the water quality data in the clean water tank.

8. A small-scale membrane-type graded water recycling control method according to claim 1, characterized in that: The process of automatically starting membrane cleaning and water tank cleaning based on system operating time, water quality data in the clean water tank and system operating status includes: When the system operation time reaches the preset operation time and the water quality data in the clean water tank is lower than the preset minimum water quality standard value or the system operation status is abnormal, membrane cleaning and water tank cleaning are automatically started.

9. A small-scale membrane-type graded water recycling system, applicable to a small-scale membrane-type graded water recycling control method as claimed in any one of claims 1 to 8, characterized in that: include: Control module, rainwater collection module, sewage collection module, water storage tank, membrane treatment module, clean water tank and cleaning module; The rainwater collection module is used to collect rainwater from the roof and transport the collected rainwater to the water storage tank; The sewage collection module is used to collect indoor sewage and transport the collected sewage to the water storage tank; The water storage tank is used to store the collected rainwater and sewage; The membrane treatment module is used to perform membrane classification treatment on the collected rainwater and sewage, and transport the rainwater and sewage after membrane classification treatment to the clean water tank; The clean water tank is used to store rainwater and sewage after membrane grading treatment; The cleaning module is used to clean the water storage tank, the membrane treatment module and the clean water tank; The control module is respectively connected to the rainwater collection module, sewage collection module, water storage tank, membrane treatment module, water purification tank and cleaning module, and controls the operation of the rainwater collection module, sewage collection module, water storage tank, membrane treatment module, water purification tank and cleaning module.

10. A small-scale membrane-type graded water recycling system according to claim 9, characterized in that: The control module includes a data detection unit and a backup water supply device; The data detection unit is used to monitor the rainwater level data of the rainwater collection module, the sewage flow data of the sewage collection module, the water level data and water quality data of the water storage tank, and the water level data and water quality data of the clean water tank in real time; the backup water supply device is used to provide a backup water supply mode; The rainwater collection module includes a rainwater pump and a roof gutter; The sewage collection module includes a wash basin, a shower basin, and a sewage valve.

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