Automatic sodium hypochlorite adding system for tap water disinfection

Abstract

The utility model discloses an automatic sodium hypochlorite adding system for tap water disinfection, which comprises a clean water tank, a water distribution room, a PLC (programmable logic controller) control module, a mechanical control system and a sodium hypochlorite adding device, the front end of the clean water tank is connected to a water inlet pipeline, and the clean water tank is communicated with the water distribution room through a connecting pipeline; the PLC control module is electrically connected with the mechanical control system, the sodium hypochlorite adding device comprises a sodium hypochlorite storage tank, a metering pump and an adding pipeline, an electric valve located between the metering pump and the sodium hypochlorite storage tank is arranged on the adding pipeline, and the metering pump is electrically connected with the PLC control module through a control cabinet; a flowmeter is arranged at the outlet end of the metering pump on the feeding pipeline, a filtered water residual chlorine instrument and a clean water tank tail end residual chlorine instrument which are positioned at the front end and the rear end are arranged in the clean water tank, and a factory water residual chlorine instrument is arranged on the water distribution pipeline of the water distribution room; the tail end of the feeding pipeline is connected to the tail ends of the water inlet pipeline and the clean water tank respectively.

Description

Technical field:

[0001] The utility model relates to the technical field of tap water treatment, in particular to an automatic sodium hypochlorite dosing system for tap water disinfection. Background technology:

[0002] Waterworks are an important part of urban water supply. In order to ensure the safety and hygiene of water quality, disinfectants are usually added. Sodium hypochlorite is a commonly used disinfectant with the characteristics of high efficiency, safety, and environmental protection. However, the traditional method of adding sodium hypochlorite usually requires manual operation, and there are problems such as inaccurate dosage and low efficiency. Therefore, it is of great significance to develop an automatic sodium hypochlorite dosing system.

[0003] The tap water disinfection systems currently on the market do not have sufficient control accuracy for the addition of sodium hypochlorite, and it is difficult to ensure the stability of the residual chlorine content, resulting in large fluctuations in the residual chlorine content in the tap water, and it is impossible to maintain a good disinfection effect. For example, the tap water disinfection system with Chinese patent application number 202120202609.2, in the technical scheme disclosed in the patent, uses a new energy power generation module 3 to supply power to the sodium hypochlorite generator 6, and the saturated salt water dissolved in the salt dissolving device 4 is diluted by the brine proportioning supply device 5, and then provided to the sodium hypochlorite generator 6 for electrolysis, thereby generating sodium hypochlorite for tap water disinfection, and the residual chlorine content in the water is detected by the residual chlorine analyzer 8, and the flow information in the tap water pipe is detected by the flow meter 9. However, since sodium hypochlorite needs to be generated by real-time electrolysis of the sodium hypochlorite generator 6, it is easily affected by voltage and other factors, resulting in unstable chlorine supply, and it is impossible to maintain a good disinfection effect. In addition, the power is provided by the new energy power generation module 3, resulting in additional equipment occupying space, increasing costs and risks.

[0004] In view of this, the inventor proposes the following technical solution. Utility model content:

[0005] The utility model aims to overcome the deficiencies of the prior art and provide a sodium hypochlorite automatic dosing system for tap water disinfection.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: an automatic sodium hypochlorite dosing system for tap water disinfection, comprising: a clean water tank, a water distribution room, a PLC control module, a machine control system and a sodium hypochlorite dosing device, the front end of the clean water tank is connected to the water inlet pipe, the clean water tank and the water distribution room are connected through a connecting pipe, the PLC control module and the machine control system are electrically connected, the sodium hypochlorite dosing device comprises: a sodium hypochlorite storage tank, a metering pump and a dosing pipe, the dosing pipe is provided with an electric valve located between the metering pump and the sodium hypochlorite storage tank, the metering pump and the PLC control module are electrically connected through a control cabinet; a flow meter is provided at the outlet end of the metering pump on the dosing pipe, a filtered water residual chlorine meter located at the front and rear ends and a clean water tank terminal residual chlorine meter are provided in the clean water tank, and a factory water residual chlorine meter is provided on the water distribution pipe of the water distribution room; the ends of the dosing pipe are respectively connected to the ends of the water inlet pipe and the clean water tank.

[0007] Furthermore, in the above technical solution, the sodium hypochlorite storage tank is provided with a tank level gauge for detecting the remaining amount, and the tank level gauge is electrically connected to the PLC control module.

[0008] Furthermore, in the above technical solution, a clear water tank level gauge for detecting the amount of water is provided in the clear water tank, and the clear water tank level gauge is electrically connected to the PLC control module.

[0009] Furthermore, in the above technical solution, the residual chlorine meter for filtered water, the residual chlorine meter at the end of the clean water tank and the residual chlorine meter for factory water are all electrically connected to the PLC control module.

[0010] Furthermore, in the above technical solution, the PLC control module is also provided with a front input signal module.

[0011] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: the utility model adopts a PLC control module to control the amount of sodium hypochlorite added to the water inlet pipe by the dosing pipe according to the content of sodium hypochlorite in the water flow of the filtered water residual chlorine meter, and to control the dosing pipe to add sodium hypochlorite to the clear water tank according to the content of sodium hypochlorite in the water at the end of the clear water tank obtained by the residual chlorine meter at the end of the clear water tank, and to obtain the content of sodium hypochlorite in the tap water delivered by the distribution pipe according to the residual chlorine meter for factory water, so as to determine that the sodium hypochlorite content in the distribution pipe meets the predetermined value, and when the residual chlorine content in the tap water fluctuates, it can be fed back to the PLC control module in real time through the residual chlorine meter for filtered water, the residual chlorine meter at the end of the clear water tank and the residual chlorine meter for factory water, so as to timely control the addition of sodium hypochlorite in the water inlet pipe or the clear water tank, so as to ensure the stability of the sodium hypochlorite content in the tap water and maintain a good disinfection effect. Description of the drawings:

[0012] Figure 1 It is a schematic diagram of the principle of the utility model. Specific implementation method:

[0013] The utility model is further described below in conjunction with specific embodiments and drawings.

[0014] See Figure 1 As shown, it is an automatic sodium hypochlorite dosing system for tap water disinfection, comprising: a clean water tank 17, a water distribution room 18, a PLC control module 1, a machine control system 9 and a sodium hypochlorite dosing device, the front end of the clean water tank 17 is connected to the water inlet pipe 16, the clean water tank 17 and the water distribution room 18 are connected through a connecting pipe, the PLC control module 1 and the machine control system 9 are electrically connected, and the sodium hypochlorite dosing device comprises: a sodium hypochlorite storage tank 2, a metering pump 3 and a dosing pipe 8, and the dosing pipe 8 is connected to the water inlet pipe 16. An electric valve 4 is provided between the metering pump 3 and the sodium hypochlorite storage tank 2, and the metering pump 3 is electrically connected to the PLC control module 1 through a control cabinet 5; a flow meter 6 is provided on the dosing pipe 8 at the outlet end of the metering pump 3, a filtered water residual chlorine meter 11 and a clear water tank end residual chlorine meter 12 are provided at the front and rear ends in the clean water tank, and a factory water residual chlorine meter 13 is provided on the water distribution pipe 14 of the water distribution room 18; the ends of the dosing pipe 8 are respectively connected to the ends of the water inlet pipe 16 and the clear water tank 17.

[0015] The PLC control module 1 is used to control the amount of sodium hypochlorite in the water flow of the water inlet pipe 16 by obtaining the content of sodium hypochlorite in the water flow of the water inlet pipe 16 according to the residual chlorine meter 11 for filtered water, and to control the dosing pipe 8 to add sodium hypochlorite to the water inlet pipe 16 according to the content of sodium hypochlorite in the water at the end of the clear water tank 17 obtained by the residual chlorine meter 12 at the end of the clear water tank, and to control the dosing pipe 8 to add sodium hypochlorite to the clear water tank 17, and to obtain the content of sodium hypochlorite in the tap water delivered by the water distribution pipe 14 according to the residual chlorine meter 13 for discharged water, so as to determine that the sodium hypochlorite content in the water distribution pipe 14 meets the predetermined value, and when the residual chlorine content in the tap water fluctuates, it can be fed back to the PLC control module 1 in real time through the residual chlorine meter 11 for filtered water, the residual chlorine meter 12 at the end of the clear water tank, and the residual chlorine meter 13 for discharged water, so as to timely control the dosing pipe 8 to add sodium hypochlorite to the water inlet pipe 16 or the clear water tank 17, so as to ensure that the sodium hypochlorite content in the tap water is stable and maintain a good disinfection effect.

[0016] Secondly, the predetermined value of the sodium hypochlorite content in the water can be input through the machine control system 9, and the value is transmitted to the PLC control module 1, and the PLC control module 1 realizes the accurate addition of sodium hypochlorite, reducing the manual operation frequency and drug consumption cost. In addition, the system also has the advantages of high reliability, good stability, strong adaptability, etc., and can be widely used in water plants and other water purification fields that require disinfection.

[0017] The sodium hypochlorite storage tank 2 is provided with a tank level gauge 7 for detecting the residual amount, and the tank level gauge 7 is electrically connected to the PLC control module 1. The clean water tank 17 is provided with a clean water tank level gauge 10 for detecting the water amount, and the clean water tank level gauge 10 is electrically connected to the PLC control module 1. The filtered water residual chlorine meter 11, the clean water tank terminal residual chlorine meter 12 and the factory water residual chlorine meter 13 are all electrically connected to the PLC control module 1. The PLC control module 1 is also provided with a front input signal module 15.

[0018] In summary, during the use of this system, the data such as the amount of sodium hypochlorite added, residual chlorine in the effluent, raw water flow, and filter outlet valve opening of the water plant are first collected for analysis, the dependent and independent variables of the mathematical model are determined, a regression analysis model is established, and the parameters are input into the PLC control system 1.

[0019] Furthermore, the set target values ​​of residual chlorine in filtered water and factory water are input through the upper computer control system 9, and the PLC control system 1 automatically calculates the basic value of sodium hypochlorite dosage according to the data of the front input signal 15, instructs the sodium hypochlorite dosing device to work, and the metering pump 3 adds a corresponding amount of sodium hypochlorite solution to the filtered water pipeline 16 and the clean water tank 17 through the dosing pipeline 8.

[0020] Furthermore, the online detection device is combined to monitor the residual chlorine data in the water after the addition of sodium hypochlorite in real time, and feedback control and adjustment are performed through the program. The PLC control system 1 automatically adjusts the amount of sodium hypochlorite added, so that the values ​​of the residual chlorine meter 11 for filtered water and the residual chlorine meter 13 for factory water are close to the set target values.

[0021] Furthermore, the host computer control system 9 displays the equipment status and online detection device data during system operation, and provides real-time feedback on equipment and production operation status, and issues an audible and visual alarm when the data deviates from normal operating conditions.

[0022] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. An automatic sodium hypochlorite dosing system for tap water disinfection, include: A clean water tank (17), a water distribution room (18), a PLC control module (1), a machine control system (9) and a sodium hypochlorite dosing device, wherein the front end of the clean water tank (17) is connected to a water inlet pipe (16), the clean water tank (17) and the water distribution room (18) are connected via a connecting pipe, and the PLC control module (1) and the machine control system (9) are electrically connected, characterized in that: The sodium hypochlorite dosing device comprises: a sodium hypochlorite storage tank (2), a metering pump (3) and a dosing pipeline (8); the dosing pipeline (8) is provided with an electric valve (4) located between the metering pump (3) and the sodium hypochlorite storage tank (2); the metering pump (3) and the PLC control module (1) are electrically connected via a control cabinet (5); The dosing pipe (8) is provided with a flow meter (6) at the outlet end of the metering pump (3); the clean water tank (1) is provided with a residual chlorine meter (11) for filtered water at the front and rear ends and a residual chlorine meter (12) at the end of the clean water tank; and the water distribution pipe (14) of the water distribution room (18) is provided with a residual chlorine meter (13) for factory water; The ends of the dosing pipe (8) are respectively connected to the ends of the water inlet pipe (16) and the clean water tank (17).

2. The automatic sodium hypochlorite dosing system for tap water disinfection according to claim 1, Features: The sodium hypochlorite storage tank (2) is provided with a tank liquid level meter (7) for detecting the residual amount, and the tank liquid level meter (7) is electrically connected to the PLC control module (1).

3. The automatic sodium hypochlorite dosing system for tap water disinfection according to claim 1, Features: The clear water tank (17) is provided with a clear water tank level meter (10) for detecting the amount of water. The clear water tank level meter (10) is electrically connected to the PLC control module (1).

4. The automatic sodium hypochlorite dosing system for tap water disinfection according to claim 1, Features: The residual chlorine meter for filtered water (11), the residual chlorine meter at the end of the clean water tank (12) and the residual chlorine meter for outgoing water (13) are all electrically connected to the PLC control module (1).

5. An automatic sodium hypochlorite dosing system for tap water disinfection according to any one of claims 1 to 4, Features: The PLC control module (1) is also provided with a front input signal module (15).

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