System for automatically controlling water quality

Abstract

The invention relates to a system for automatically controlling water quality, which belongs to the technical field of water quality automatic control and comprises a water quality detector, a water quality sensor and a water quality controller, the electric drain valve is connected with a drain pipe of the target water system; the electric water replenishing valve is connected with a water purifying pipe; the purified water pipe is used for supplementing purified water for a target water system; the PLC is in communication connection with the water quality detector, the electric drain valve and the electric water replenishing valve, when the water quality of the target water system is not within a set range, the electric drain valve is controlled to drain water in the target water system to the lowest liquid level, and then the electric water replenishing valve is controlled to replenish purified water to the target water system to the highest liquid level; the water quality of the target water system is within the set range. The water quality is monitored in real time through the water quality detector, water drainage and water replenishing can be automatically started once the water quality exceeds a set range, and manual guarding or manual water changing opportunity judgment is not needed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic water quality control, in particular to a system for automatically controlling water quality. BACKGROUND

[0002] At present, traditional water quality management applied in the metallurgical industry, the chemical industry and the like relies on manual detection and manual adjustment. After the detection data is presented, the water is supplemented according to the results, the response is lagging, and water quality accidents or a large amount of water discharge can cause water source waste and be uneconomical. In the process of water discharge and water supplement, there is a lack of cooperation, which can easily cause water resource waste or liquid level out of control. A closed-loop control system integrating detection, decision and execution is urgently needed to realize multi-parameter collaborative optimization and liquid level safety protection. SUMMARY

[0003] To solve the above problems, the purpose of the embodiment of the present application is to provide a system for automatically controlling water quality.

[0004] A system for automatically controlling water quality, comprising:

[0005] a water quality detector for collecting water quality of a target water system;

[0006] an electric water discharge valve connected to a water discharge pipe of the target water system;

[0007] an electric water supplement valve for connecting a clean water pipe, wherein the clean water pipe is used for supplementing clean water to the target water system;

[0008] a PLC controller in communication connection with the water quality detector, the electric water discharge valve and the electric water supplement valve, when the water quality of the target water system is not within a set range, the electric water discharge valve is controlled to discharge water in the target water system to a lowest liquid level, and then the electric water supplement valve is controlled to supplement clean water to the target water system to a highest liquid level, until the water quality of the target water system is within the set range.

[0009] Preferably, a liquid level sensor is further included for monitoring the liquid level of the target water system.

[0010] Preferably, the electric water discharge valve and the electric water supplement valve are connected to the PLC controller through a Modbus bus.

[0011] According to the specific embodiments provided by the present application, the following technical effects are disclosed:

[0012] Compared with the prior art, the present application can monitor water quality in real time through a water quality detector, and automatically start water discharge and water supplement once the water quality exceeds the set range, without manual attendance or manual judgment of water changing time.

[0013] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically described below, and the accompanying drawings are referred to as follows. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0015] Figure 1 A schematic diagram of a system for automatically controlling water quality is provided. DETAILED DESCRIPTION

[0016] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0017] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0018] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0019] Please refer to Figure 1 A system for automatically controlling water quality, comprising:

[0020] A water quality detector for collecting the water quality of a target water system.

[0021] In the water system, an online water quality detector is installed to monitor target parameters (such as pH, turbidity, conductivity, chloride, total hardness, total phosphorus) in real time, and the required water quality parameters are set according to the place of the circulating water system (such as conductivity in the range of 2000-4000 μs / cm, chloride in the range of 300-500 mg / L as normal water quality).

[0022] An electric drainage valve is connected with the drainage pipe of the target water system.

[0023] An electric water replenishment valve is used to connect a clean water pipe, and the clean water pipe is used to replenish clean water for the target water system.

[0024] A PLC controller is in communication connection with the water quality detector, the electric drainage valve and the electric water replenishment valve, and when the water quality of the target water system is not within the set range, the electric drainage valve is controlled to drain the water in the target water system to the lowest liquid level, and then the electric water replenishment valve is controlled to replenish clean water for the target water system to the highest liquid level, until the water quality of the target water system is within the set range.

[0025] The principle of the application will be described below in combination with specific embodiments:

[0026] Automatic water quality regulation system for air compression station

[0027] Hardware connection: The online multi-parameter detector is installed on the circulating water pipeline of the air compression station to monitor the conductivity in the range of 2000-4000 μs / cm and the chloride in the range of 300-500 mg / L. The liquid level sensor is of ultrasonic type, L_min=80% of the pool depth, and L_max=95% of the pool depth. The drainage valve and the water replenishment valve are connected to the PLC controller through the Modbus bus.

[0028] Control program logic

[0029] Check whether the dynamic detection value of the water quality is within the parameter range, if a certain value exceeds the range, trigger the automatic start of the drainage valve program, drain according to the lowest liquid level setting to trigger the stop drainage program to automatically close the drainage valve, then trigger the automatic start of the water replenishment valve program, and when replenishing to the highest liquid level, trigger the stop water replenishment logic to stop water replenishment. Until the dynamic detection value of the water quality reaches the parameter setting range.

[0030] The control program is as follows:

[0031] Python

[0032] While True:

[0033] water_quality = sensor.read() # read water quality data

[0034] water_level = level_sensor.read()

[0035] if not check_standard(water_quality): # water quality is not up to standard

[0036] if water_level > L_min:

[0037] open_drain_valve() # drain to the minimum water level

[0038] else:

[0039] close_drain_valve()

[0040] open_fill_valve() # fill water to the maximum water level

[0041] elif water_level < L_max: # water quality is up to standard but water level is insufficient

[0042] open_fill_valve()

[0043] else:

[0044] close_all_valves() # keep the status

[0045] The application controls dynamically and automatically triggers the cycle of "draining water and filling water" when the water quality is not up to standard until the detection is up to standard. In addition, the application sets double insurance for the water level, stops the water level forcibly when draining water to be greater than or equal to L_min to prevent the equipment from breaking water, and stops the water level forcibly when filling water to be less than or equal to L_max to avoid overflow.

[0046] The above is only a specific embodiment of the application, but the protection scope of the application is not limited to this. Any skilled person in the art can easily think of changes or alternative technical solutions within the technical range disclosed by the application, which should be covered within the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A system for automatically controlling water quality, characterized by, Comprise: water quality detector for collecting water quality of target water system; electric drain valve connected with drain pipe of target water system; electric water replenishing valve for connecting clean water pipe, the clean water pipe is used for replenishing clean water for target water system; PLC controller, which is in communication connection with water quality detector, electric drain valve and electric water replenishing valve respectively, when water quality of target water system is not in the set range, controls electric drain valve to drain water in target water system to the lowest liquid level, then controls electric water replenishing valve to replenish clean water for target water system to the highest liquid level, until water quality of target water system is in the set range.

2. The system for automatically controlling water quality according to claim 1, wherein It also comprises liquid level sensor for monitoring liquid level of target water system.

3. The system for automatically controlling water quality according to claim 2, wherein Electric drain valve and electric water replenishing valve are connected to PLC controller through Modbus bus.

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