Automatic mixing and proportioning control system for reverse osmosis (RO) water and softened water

Abstract

The invention belongs to the technical field of water treatment mixing and proportioning, and particularly discloses and provides an automatic reverse osmosis RO water and softened water mixing and proportioning control system which is characterized in that the turbulent energy coefficient of mixed water is constructed by monitoring the fluid state of reverse osmosis RO water and softened water; the water quality component ratio of the RO water and the softened water is determined by detecting each water quality component of corresponding water inlet pipes of the RO water and the softened water; by monitoring the water quality change of the mixed water, the pressure loss function of the mixed water in the mixing tank is analyzed, the mass transfer coefficient of the mixed water in the mixing tank is constructed, and an important basis is provided for optimizing the mixing process; by intelligently regulating and controlling the opening degrees of flow valves of reverse osmosis RO water and softened water, finely adjusting the proportion according to water quality parameters monitored in real time, and meanwhile, changing the corresponding limit value of the mixing regulation and control proportion of the reverse osmosis RO water and the softened water, the mixing proportion of the reverse osmosis RO water and the softened water is favorably optimized, and the stable operation of the system is maintained.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment mixing ratio, and relates to an automatic mixing ratio control system for reverse osmosis RO water and softened water. Background Art

[0002] With the acceleration of industrialization and urbanization, the water quality problem of water resources has become increasingly prominent. In many industrial production and household water use occasions, the requirements for water quality are getting higher and higher. It is necessary not only to remove the hardness ions in the water to prevent scaling, but also to further purify the water quality and remove impurities such as soluble solids, organic matter and microorganisms. Among them, reverse osmosis technology and softening water technology are two widely used water treatment methods at present. They each have unique advantages and limitations. In order to combine the advantages of these two technologies and overcome their respective limitations, the present invention proposes a "reverse osmosis RO water and softened water automatic mixing ratio control system", which aims to provide water of different qualities according to actual needs by accurately controlling the mixing ratio of RO water and softened water, thereby realizing an economical, efficient and multifunctional water treatment solution.

[0003] Although there are some solutions for water treatment mixing ratios, there are still the following limitations: 1. When identifying water treatment mixing ratios, the existing technology mainly focuses on the overall compensation of water content, that is, achieving specific water quality standards by adding or removing a certain amount of water, ignoring the specific content and proportion of various components in the water, which may lead to the absence or excess of certain key components.

[0004] 2. In the prior art, there is no clear limit range for the real-time adjustment value of the water treatment mixing ratio. If the real-time control operation is too frequent, the operating load of the equipment will increase, making it difficult for the system to maintain a stable state; if the real-time control operation is too delayed, the missing components in the mixed water cannot be replenished in time, resulting in substandard water quality. Therefore, it is necessary to change the real-time adjustment value of the water treatment mixing ratio according to actual needs. Summary of the invention

[0005] In view of this, in order to solve the problems raised in the above background technology, a reverse osmosis RO water and softened water automatic mixing ratio control system is now proposed.

[0006] The purpose of the present invention can be achieved through the following technical scheme: The present invention provides a reverse osmosis RO water and softened water automatic mixing ratio control system, the system includes: an operating condition detection module, which is used to detect the operating conditions of the mixing tank and construct the turbulent kinetic energy coefficient of the mixed water in the mixing tank.

[0007] The two-type water mixing identification module is used to detect the water quality components of the corresponding water inlet pipes of reverse osmosis RO water and softened water, and determine the corresponding water quality component ratios of reverse osmosis RO water and softened water.

[0008] The mixed water quality detection module is used to detect the mixed water quality parameters and construct the mass transfer coefficient of the mixed water in the mixing tank.

[0009] The opening adjustment module is used to set the mixing control ratio of reverse osmosis RO water and softened water, adjust the opening of the flow valve, and monitor and adjust in real time based on the turbulent kinetic energy coefficient of the mixed water in the mixing tank, the corresponding water quality component ratios of reverse osmosis RO water and softened water, and the mass transfer coefficient of the mixed water in the mixing tank.

[0010] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention constructs the turbulent kinetic energy coefficient of the mixed water by monitoring the fluid state of reverse osmosis RO water and softened water, thereby providing an important parameter for optimizing the mixing effect of the mixed water in the mixing tank.

[0011] (2) The present invention determines the water quality component ratio of the reverse osmosis RO water and softened water by detecting the water quality components of the corresponding water inlet pipes of the reverse osmosis RO water and softened water, and analyzing the corresponding water production interception indicators of the reverse osmosis RO water and softened water. Since the water quality components of the reverse osmosis RO water and softened water from different sources may be different, this precise measurement and identification capability can flexibly adapt to such changes, providing reliable data support for subsequent mixing ratios, thereby ensuring that the mixed water quality always meets the production requirements.

[0012] (3) The present invention monitors the water quality changes of the mixed water, analyzes the pressure loss function of the mixed water in the mixing tank, and constructs the mass transfer coefficient of the mixed water in the mixing tank, thereby providing an important basis for optimizing the mixing process.

[0013] (4) The present invention ensures that the water quality after mixing meets the production requirements by intelligently regulating the flow valve opening of reverse osmosis RO water and softened water, and fine-tunes the ratio according to the water quality parameters monitored in real time, so as to timely discover and correct the deviation in the mixing process, ensure the stability and accuracy of the mixing process, and further optimize the mixing effect. At the same time, by detecting the corresponding flow valve controllability index of the two types of water and the pressure loss index caused by the redistribution of the water flow velocity due to the flow valve opening control, the corresponding limit value of the mixed control ratio of reverse osmosis RO water and softened water is changed, which helps to optimize the mixing ratio of reverse osmosis RO water and softened water, thereby maintaining the stable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the connection of the system modules of the present invention. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1 As shown, the present invention provides a reverse osmosis RO water and softened water automatic mixing ratio control system, the system includes: an operating condition detection module, a two-type water mixing identification module, a mixed water quality detection module, and an opening adjustment module.

[0018] The operating condition detection module is connected to the two-type water mixing identification module, the two-type water mixing identification module is connected to the mixed water quality detection module, and the opening adjustment module is respectively connected to the operating condition detection module, the two-type water mixing identification module, and the mixed water quality detection module.

[0019] The operating condition detection module is used to detect the operating conditions of the mixing tank and construct the turbulent kinetic energy coefficient of the mixed water in the mixing tank.

[0020] In a preferred embodiment, the mixing tank operating conditions include water inlet flow rate, water inlet pressure, and water inlet temperature.

[0021] In a further preferred embodiment, the turbulent kinetic energy coefficient of the mixed water in the mixing ratio tank is constructed by: using a sensor to detect the water inlet flow rate v of the corresponding water inlet pipes of the reverse osmosis RO water and the softened water in real time RO ,υ 软 and fluid density ρ RO , 软 , calculate the basic kinetic energy of the mixed water in the mixing tank

[0022] The sensor detects the water inlet pressure F of the corresponding water inlet pipes of reverse osmosis RO water and softened water in real time RO 、F 软 and inlet water temperature T RO , T 软 , construct the turbulent kinetic energy coefficient of the mixed water in the mixing tank Wherein χ represents the set constant, E′ represents the preset reference kinetic energy, F0 represents the preset reference inlet water pressure, and T0 represents the preset reference inlet water temperature.

[0023] The sensors include pressure sensors, fluid density sensors, temperature sensors, etc.

[0024] The present invention constructs the turbulent kinetic energy coefficient of the mixed water by monitoring the fluid state of reverse osmosis RO water and softened water, and provides an important parameter for optimizing the mixing effect of the mixed water in the mixing tank. The size of the turbulent kinetic energy coefficient directly affects the uniformity and stability of the mixed water, thereby ensuring that the water quality of the mixed water meets the production requirements.

[0025] The two-type water mixing identification module is used to detect the measurement of each water quality component of the corresponding water inlet pipes of reverse osmosis RO water and softened water, and determine the corresponding water quality component ratio of reverse osmosis RO water and softened water.

[0026] In a preferred embodiment, the determining of the ratio of the water quality components of the reverse osmosis RO water and the softened water also includes: detecting the water quality components of the reverse osmosis RO water and the softened water in the corresponding water inlet pipes in real time by a sensor. RO→h , W 软→h , h is the number of the water quality component, h=1,2,...,b, and the water quality components include pH, conductivity, dissolved solid content, etc.

[0027] The performance tester is used to detect the structural characteristics of the RO membrane components of the reverse osmosis RO water inlet pipe, and the corresponding water interception index Cd of the reverse osmosis RO water is analyzed. RO Then, the corresponding water interception index of the reverse osmosis RO water is multiplied by the water quality components of the corresponding water inlet pipe of the reverse osmosis RO water. Get the actual amount of each water quality component Cd′ of reverse osmosis RO water RO→h .

[0028] The structural characteristics of the RO membrane assembly of the reverse osmosis RO water corresponding to the water inlet pipe refer to the transmembrane pressure difference between the water inlet side and the water production side of the RO membrane assembly and its corresponding conductivity.

[0029] The water inlet side refers to the extended side where the reverse osmosis RO water is transmitted from the water inlet interface to the RO membrane component structure end.

[0030] The water production side refers to the extended side where the reverse osmosis RO water is transmitted from the RO membrane component structure to the inside of the mixing tank.

[0031] The filter structure characteristics of the corresponding water inlet pipe of softened water are tested by the performance tester, and the corresponding water interception index Cd of softened water is analyzed. 软 , and then multiply the corresponding water interception index of softened water by the water quality component measurement of the corresponding water inlet pipe of softened water Get the actual amount of each water quality component Cd′ of softened water 软→h .

[0032] The filter structural characteristics of the softened water corresponding water inlet pipe refer to the transmembrane pressure difference between the water inlet side and the water production side of the filter and its corresponding conductivity.

[0033] The corresponding water quality components of reverse osmosis RO water and softened water are measured and compared to obtain the corresponding water quality component ratio of reverse osmosis RO water and softened water.

[0034] In a further preferred embodiment, the analysis of the corresponding water production interception index of reverse osmosis RO water includes: measuring the transmembrane pressure difference between the water inlet side and the water production side, comparing the transmembrane pressure difference between the water inlet side and the water production side with a preset transmembrane pressure difference threshold, if the transmembrane pressure difference between the water inlet side and the water production side exceeds the preset transmembrane pressure difference threshold, it is determined that the RO membrane component is scaled; if the transmembrane pressure difference between the water inlet side and the water production side does not exceed the preset transmembrane pressure difference threshold, it is determined that the RO membrane component is not scaled.

[0035] Detect the corresponding conductivity β1 and β2 of the inlet side and the produced water side of the RO membrane assembly in the corresponding inlet pipe of the reverse osmosis RO water, and obtain the desalination rate of the RO membrane assembly in the corresponding inlet pipe of the reverse osmosis RO water Specifically, the desalination rate refers to the ability of the RO membrane component to remove dissolved solids from the influent water. A decrease in the desalination rate may indicate that the RO membrane component is damaged or contaminated.

[0036] Obtain the preset reference desalination rate Dr' of the RO membrane assembly in the corresponding water inlet pipe of the reverse osmosis RO water, and analyze the corresponding water production interception index of the reverse osmosis RO water Wherein U1 and U2 represent the preset interception influence weights corresponding to the presence and absence of scaling of the RO membrane group, respectively, U1>U2, m1 represents the presence of scaling of the RO membrane group, and m2 represents the absence of scaling of the RO membrane group.

[0037] According to the analysis method of the corresponding water production interception index of reverse osmosis RO water, the corresponding water production interception index of softened water is analyzed in the same way.

[0038] The present invention determines the water quality component ratio of reverse osmosis RO water and softened water by detecting the water quality components of the corresponding water inlet pipes of reverse osmosis RO water and softened water and analyzing the corresponding water production interception indicators of reverse osmosis RO water and softened water. Since the water quality components of reverse osmosis RO water and softened water from different sources may be different, this precise measurement and identification capability can flexibly adapt to such changes, provide reliable data support for subsequent mixing ratios, and thus ensure that the mixed water quality always meets the production requirements.

[0039] The mixed water quality detection module is used to detect the mixed water quality parameters and construct the mass transfer coefficient of the mixed water in the mixing tank.

[0040] In a preferred embodiment, the mass transfer coefficient of the mixed water in the mixing tank is constructed by: using a sensor to detect the water quality parameters of the mixed water in the mixing tank in real time, including turbidity hardness Viscosity Analysis of the pressure loss function of mixed water in the mixing tank In the formula They respectively represent the preset suitable turbidity, suitable hardness and suitable viscosity.

[0041] Specifically, the turbidity, hardness and viscosity of the fluid will increase the friction and mixing degree of the fluid, thereby increasing the pressure loss, which in turn leads to deviations in the mixing stability of the mixed water in the mixing tank.

[0042] The flowmeter is used to detect the corresponding discharge volume q of the mixed water in the mixing tank. 排 , the water flow rate q of the corresponding inlet pipes of reverse osmosis RO water and softened water RO ,q 软 , analyze the ratio of the corresponding water production flow and discharge volume of the mixed water in the mixing tank

[0043] The ratio of the discharge volume to the produced water flow rate may cause a change in the pressure in the mixing tank. The change in pressure will affect the interaction force and diffusion rate between fluids, and further affect the mass transfer coefficient.

[0044] Constructing the mass transfer coefficient of mixed water in the mixing tank Where κ0 represents the appropriate production and discharge flow ratio of the mixed water in the preset mixing ratio tank, and e is a natural constant.

[0045] The mass transfer coefficient is an important parameter for measuring the material exchange rate between fluids, and reflects the amount of material transferred from one phase to another phase per unit time and per unit area.

[0046] The present invention provides an important basis for optimizing the mixing process by monitoring the water quality changes of the mixed water, analyzing the pressure loss function of the mixed water in the mixing tank, and constructing the mass transfer coefficient of the mixed water in the mixing tank. The size of the mass transfer coefficient directly affects the uniformity and stability of the water quality of the mixed water, thereby ensuring that the mixed water can meet production needs.

[0047] The opening adjustment module is used to set the mixing control ratio of reverse osmosis RO water and softened water, adjust the flow valve opening, and monitor and adjust in real time based on the turbulent kinetic energy coefficient of the mixed water in the mixing tank, the corresponding water quality component ratios of reverse osmosis RO water and softened water, and the mass transfer coefficient of the mixed water in the mixing tank.

[0048] In a preferred embodiment, the mixing ratio of reverse osmosis RO water and softened water is set, including: extracting the preset flow demand ratio κ′ of reverse osmosis RO water and softened water in the mixing tank h , and obtain the designated measurement W′ corresponding to each water quality component in the unit flow of reverse osmosis RO water and softened water RO→h , W′ 软→h, obtain the expected ratio of each water quality component of reverse osmosis RO water and softened water

[0049] The ratio of each water quality component corresponding to the reverse osmosis RO water and the softened water is obtained, and the ratio of each water quality component corresponding to the reverse osmosis RO water and the softened water is compared with the expected ratio of the corresponding water quality component. If the ratio of a certain water quality component corresponding to the reverse osmosis RO water and the softened water is lower than the expected ratio of the corresponding water quality component, it means that the reverse osmosis RO water is less than the water quality component of the softened water. The difference between the ratio of a certain water quality component corresponding to the reverse osmosis RO water and the softened water and the expected ratio of the corresponding water quality component is obtained as the missing ratio of the reverse osmosis RO water phase to which the mixed water in the mixing tank belongs; if the ratio of the water quality component corresponding to the reverse osmosis RO water and the softened water phase is higher than the expected ratio of the corresponding water quality component, it means that the reverse osmosis RO water is more than the water quality component of the softened water. The difference between the ratio of a certain water quality component corresponding to the reverse osmosis RO water and the expected ratio of the corresponding water quality component is obtained as the saturation ratio of the reverse osmosis RO water phase to which the mixed water in the mixing tank belongs.

[0050] The comprehensive missing ratio and comprehensive saturation ratio of the corresponding water quality components of the reverse osmosis RO water to which the mixed water in the mixing ratio tank belongs are counted, and the comprehensive missing ratio and comprehensive saturation ratio of the corresponding water quality components of the softened water to which the mixed water in the mixing ratio tank belongs are identified. Specifically, the comprehensive missing ratio of the corresponding water quality components of the softened water to which the mixed water in the mixing ratio tank belongs is the comprehensive saturation ratio of the corresponding water quality components of the reverse osmosis RO water to which the mixed water in the mixing ratio tank belongs, and the comprehensive saturation ratio of the corresponding water quality components of the softened water to which the mixed water in the mixing ratio tank belongs is the comprehensive missing ratio of the corresponding water quality components of the reverse osmosis RO water to which the mixed water in the mixing ratio tank belongs.

[0051] Extract the comprehensive missing ratio and comprehensive saturation ratio of the corresponding water quality components of the reverse osmosis RO water or softened water in the mixing tank, record it as τ, combine the turbulent kinetic energy coefficient η of the mixed water in the mixing tank and the mass transfer coefficient MTC of the mixed water in the mixing tank, and set the mixing control ratio of reverse osmosis RO water and softened water. Wherein η0 and MTC0 represent the preset suitable turbulent kinetic energy coefficient and suitable mass transfer coefficient of the mixed water in the mixing tank, respectively; Δη and ΔMTC represent the preset deviation allowable values ​​of the corresponding turbulent kinetic energy coefficient and mass transfer coefficient of the mixed water in the mixing tank, respectively.

[0052] In a further preferred embodiment, the regulating flow valve opening includes: identifying the current openings of the flow valves corresponding to the reverse osmosis RO water and the softened water; if the current openings of the flow valves corresponding to the reverse osmosis RO water and the softened water do not reach the opening threshold, then obtaining the type of water in which the comprehensive deficiency ratio of water quality components in the two types of water is higher than the comprehensive saturation ratio, and increasing the opening of the corresponding flow valve of this type of water.

[0053] If the current opening of the flow valve corresponding to a certain type of water reaches the opening threshold, the comprehensive deficiency ratio and comprehensive saturation ratio of the corresponding water quality components of this type of water are identified. When the comprehensive deficiency ratio of the corresponding water quality components of this type of water is lower than the comprehensive saturation ratio, the opening of the flow valve corresponding to this type of water is lowered; otherwise, the opening of the flow valve corresponding to another type of water is raised.

[0054] If the current openings of the flow valves corresponding to the two types of water reach the opening thresholds, the type of water whose comprehensive deficiency ratio of water quality components in the two types of water is lower than the comprehensive saturation ratio is obtained, and the openings of the flow valves corresponding to this type of water are lowered.

[0055] In a further preferred embodiment, the content of the real-time monitoring and adjustment is: according to the set detection cycle, the flow valve opening is monitored and regulated in real time, and the corresponding limit value of the mixed regulation ratio of reverse osmosis RO water and softened water is changed.

[0056] The corresponding limit value of the mixed control ratio of reverse osmosis RO water and softened water refers to the threshold value at which the mixed control ratio of reverse osmosis RO water and softened water reaches the control requirement.

[0057] In a further preferred embodiment, the change of the corresponding limit value of the mixed control ratio of reverse osmosis RO water and softened water includes: obtaining the opening control frequency and single average adjustment opening of the corresponding flow valves of the two types of water within the set detection period, and respectively comparing the opening control frequency and single average adjustment opening of the corresponding flow valves of the two types of water within the set detection period with the corresponding preset reference opening control frequency and single reference average adjustment opening of the corresponding type of water, and then multiplying the two ratios to obtain the controllability indicators Ι1 and Ι2 of the corresponding flow valves of the two types of water.

[0058] Obtain the preset control stress P corresponding to the unit opening of the flow valve, extract the density ρ0 of the water body in the water inlet pipe, and detect the pressure loss index caused by the redistribution of the water flow velocity due to the flow valve opening control Where θ1 and θ2 represent the single average opening of the corresponding flow valves of the two types of water within the set detection period, and ρ′0 represents the preset water reference density.

[0059] The density of the water in the water inlet pipe is the average value of the fluid density of the corresponding water inlet pipes of reverse osmosis RO water and softened water.

[0060] Get the current limit setting value τ0 corresponding to the mixed control ratio of reverse osmosis RO water and softened water, and change the corresponding limit value of the mixed control ratio of reverse osmosis RO water and softened water

[0061] The present invention ensures that the water quality after mixing meets the production requirements by intelligently regulating the flow valve opening of reverse osmosis RO water and softened water, and fine-tunes the ratio according to the water quality parameters monitored in real time, so as to timely discover and correct the deviation in the mixing process, ensure the stability and accuracy of the mixing process, and further optimize the mixing effect. At the same time, by detecting the corresponding flow valve controllability index of the two types of water, the pressure loss index generated by the redistribution of the water flow rate due to the flow valve opening control, the corresponding limit value of the mixed control ratio of reverse osmosis RO water and softened water is changed, which helps to optimize the mixing ratio of reverse osmosis RO water and softened water, thereby maintaining the stable operation of the system.

[0062] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, they shall all fall within the protection scope of the present invention.

Claims

1. A reverse osmosis RO water and softened water automatic mixing ratio control system, characterized in that: The system includes: An operating condition detection module is used to detect the operating conditions of the mixing tank and construct the turbulent kinetic energy coefficient of the mixed water in the mixing tank; Two types of water mixing identification module, used to detect the measurement of various water quality components of the corresponding water inlet pipes of reverse osmosis RO water and softened water, and determine the corresponding water quality component ratio of reverse osmosis RO water and softened water; Mixed water quality detection module, used to detect the mixed water quality parameters and construct the mass transfer coefficient of the mixed water in the mixing tank; The opening adjustment module is used to set the mixing ratio of reverse osmosis RO water and softened water, adjust the flow valve opening, and monitor and adjust in real time.

2. The automatic mixing ratio control system of reverse osmosis RO water and softened water according to claim 1 is characterized in that: The operating conditions of the mixing tank include water inlet flow rate, water inlet pressure, and water inlet temperature.

3. The automatic mixing ratio control system of reverse osmosis RO water and softened water according to claim 2 is characterized in that: The specific method for constructing the turbulent kinetic energy coefficient of the mixed water in the mixing ratio tank is as follows: The sensor detects the water flow rate v of the corresponding water inlet pipes of reverse osmosis RO water and softened water in real time RO ,υ 软 and fluid density ρ RO , 软 , calculate the basic kinetic energy of the mixed water in the mixing tank The sensor detects the water inlet pressure F of the corresponding water inlet pipes of reverse osmosis RO water and softened water in real time RO 、F 软 and inlet water temperature T RO 、T 软 , construct the turbulent kinetic energy coefficient of the mixed water in the mixing tank Wherein χ represents the set constant, E′ represents the preset reference kinetic energy, F0 represents the preset reference inlet water pressure, and T0 represents the preset reference inlet water temperature.

4. The automatic mixing ratio control system of reverse osmosis RO water and softened water according to claim 1, characterized in that: The determination of the ratio of the corresponding water quality components of reverse osmosis RO water and softened water also includes: The sensor is used to detect the water quality components of the corresponding water inlet pipes of reverse osmosis RO water and softened water in real time. RO→h , W 软→h , h is the number of the water quality component, h = 1, 2, ..., b; The performance tester is used to detect the structural characteristics of the RO membrane components of the reverse osmosis RO water inlet pipe, and the corresponding water interception index Cd of the reverse osmosis RO water is analyzed. RO , and then multiply it with the water quality components of the corresponding inlet pipe of reverse osmosis RO water Get the actual amount of each water quality component Cd′ of reverse osmosis RO water RO→h ; The filter structure characteristics of the corresponding water inlet pipe of softened water are tested by the performance tester, and the corresponding water interception index Cd of softened water is analyzed. 软 , and then multiply it with the water quality components of the corresponding inlet pipe of softened water Get the actual amount of each water quality component Cd′ of softened water 软→h ; The corresponding water quality components of reverse osmosis RO water and softened water are measured and compared to obtain the corresponding water quality component ratio of reverse osmosis RO water and softened water.

5. The automatic mixing ratio control system of reverse osmosis RO water and softened water according to claim 4, characterized in that: The corresponding contents of analyzing the corresponding water interception index of reverse osmosis RO water include: The transmembrane pressure difference between the water inlet side and the water production side is measured, and compared with the preset transmembrane pressure difference threshold. If it exceeds the preset transmembrane pressure difference threshold, it is determined that the RO membrane component is scaled, otherwise it is determined that the RO membrane component is not scaled; Detect the corresponding conductivity of the water inlet side and the water production side of the RO membrane assembly in the corresponding water inlet pipe of the reverse osmosis RO water, and obtain the desalination rate Dr of the RO membrane assembly in the corresponding water inlet pipe of the reverse osmosis RO water; Obtain the preset reference desalination rate Dr' of the RO membrane assembly in the corresponding water inlet pipe of the reverse osmosis RO water, and analyze the corresponding water production interception index of the reverse osmosis RO water Where U1 and U2 represent the preset interception influence weights when the RO membrane group has scaling and does not have scaling, respectively; m1 represents the presence of scaling in the RO membrane group, and m2 represents the absence of scaling in the RO membrane group; According to the analysis method of the corresponding water production interception index of reverse osmosis RO water, the corresponding water production interception index of softened water is analyzed in the same way.

6. The automatic mixing ratio control system of reverse osmosis RO water and softened water according to claim 1, characterized in that: The mass transfer coefficient of the mixed water in the mixing ratio tank is constructed in the following specific method: The sensor can detect the water quality parameters of the mixed water in the mixing tank in real time, including turbidity hardness Viscosity Analysis of the pressure loss function of mixed water in the mixing tank In the formula They represent the preset suitable turbidity, suitable hardness and suitable viscosity respectively; The flowmeter is used to detect the corresponding discharge volume of the mixed water in the mixing tank, the water flow rate of the reverse osmosis RO water and the softened water in the corresponding water inlet pipe, and the ratio κ of the corresponding water flow rate and discharge volume of the mixed water in the mixing tank is analyzed; Constructing the mass transfer coefficient of mixed water in the mixing tank Where κ0 represents the appropriate production and discharge flow ratio of the mixed water in the preset mixing ratio tank, and e is a natural constant.

7. The automatic mixing ratio control system of reverse osmosis RO water and softened water according to claim 4, characterized in that: The mixing ratio of reverse osmosis RO water and softened water is set, and the contents include: The preset flow demand ratio κ′ of reverse osmosis RO water and softened water in the extraction mixing tank h , and obtain the designated measurement W′ corresponding to each water quality component in the unit flow of reverse osmosis RO water and softened water RO→h , W′ 软→h , obtain the expected ratio of each water quality component of reverse osmosis RO water and softened water Obtain the ratio of each water quality component of the reverse osmosis RO water and the softened water, and compare it with the expected ratio of the corresponding water quality component. If the ratio of a certain water quality component of the reverse osmosis RO water and the softened water is lower than the expected ratio of the corresponding water quality component, obtain the difference as the missing ratio of the reverse osmosis RO water phase of the mixed water in the mixing tank; if the ratio of the water quality component of the reverse osmosis RO water and the softened water phase is higher than the expected ratio of the corresponding water quality component, obtain the difference as the saturation ratio of the reverse osmosis RO water phase of the mixed water in the mixing tank; Count the comprehensive missing ratio and comprehensive saturation ratio of the corresponding water quality components of the reverse osmosis RO water to which the mixed water in the mixing tank belongs, and identify the comprehensive missing ratio and comprehensive saturation ratio of the corresponding water quality components of the softened water to which the mixed water in the mixing tank belongs; Extract the corresponding ratio of the comprehensive deficiency ratio and the comprehensive saturation ratio of the corresponding water quality components of the reverse osmosis RO water or softened water in the mixing tank, combine the turbulent kinetic energy coefficient of the mixed water in the mixing tank and the mass transfer coefficient of the mixed water in the mixing tank, and set the mixing control ratio of reverse osmosis RO water and softened water.

8. The automatic mixing ratio control system of reverse osmosis RO water and softened water according to claim 7, characterized in that: The content of regulating the flow valve opening includes: Identify the current opening of the flow valves corresponding to the reverse osmosis RO water and the softened water. If the current opening of the flow valves corresponding to the reverse osmosis RO water and the softened water do not reach the opening threshold, obtain the type of water whose comprehensive deficiency ratio of water quality components in the two types of water is higher than the comprehensive saturation ratio, and increase the opening of the flow valve corresponding to the type of water; If the current opening of the flow valve corresponding to a certain type of water reaches the opening threshold, the comprehensive deficiency ratio and comprehensive saturation ratio of the water quality components corresponding to this type of water are identified. When the comprehensive deficiency ratio of the water quality components corresponding to this type of water is lower than the comprehensive saturation ratio, the opening of the flow valve corresponding to this type of water is adjusted downward, otherwise the opening of the flow valve corresponding to another type of water is adjusted upward; If the current openings of the flow valves corresponding to the two types of water reach the opening thresholds, the type of water whose comprehensive deficiency ratio of water quality components in the two types of water is lower than the comprehensive saturation ratio is obtained, and the openings of the flow valves corresponding to this type of water are lowered.

9. The automatic mixing ratio control system of reverse osmosis RO water and softened water according to claim 1, characterized in that: The content of the real-time monitoring and adjustment is: according to the set detection cycle, the flow valve opening is monitored and regulated in real time, and the corresponding limit value of the mixed regulation ratio of reverse osmosis RO water and softened water is changed.

10. The automatic mixing ratio control system of reverse osmosis RO water and softened water according to claim 9, characterized in that: The content of changing the corresponding limit value of the mixing ratio of reverse osmosis RO water and softened water includes: Obtain the opening control frequency and single average adjustment opening of the corresponding flow valves of the two types of water within the set detection period, and compare them with the corresponding preset reference opening control frequency and single reference average adjustment opening of the corresponding type of water, and then multiply the two ratios to obtain the controllability indicators Ι1 and Ι2 of the corresponding flow valves of the two types of water; Obtain the preset control stress corresponding to the unit opening of the flow valve, extract the density of the water body in the water inlet pipe, and detect the pressure loss index caused by the redistribution of the water flow velocity due to the flow valve opening control Get the current limit setting value τ0 corresponding to the mixed control ratio of reverse osmosis RO water and softened water, and change the corresponding limit value of the mixed control ratio of reverse osmosis RO water and softened water

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