Sodium hypochlorite feeding system

Abstract

The utility model relates to the technical field of water supply control systems, in particular to a sodium hypochlorite feeding system which comprises a first water pump, a sedimentation tank, a filter tank, a clean water tank and a second water pump which are sequentially connected, and further comprises a sodium hypochlorite feeding device, a first flow meter, a second flow meter, a first residual chlorine instrument, a second residual chlorine instrument and a third residual chlorine instrument, the first flow meter is arranged at the water outlet end of the first water pump, the second flow meter is arranged at the water outlet end of the filter tank, the first residual chlorine instrument is arranged at the water inlet end of the clean water tank, the second residual chlorine instrument is arranged at the water outlet end of the clean water tank, and the third residual chlorine instrument is arranged at the water outlet end of the second water pump; the second output end of the sodium hypochlorite feeding device is connected with the water inlet end of the clean water tank. The technical problem that an existing sodium hypochlorite feeding system is insufficient in accuracy is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of water supply control systems, in particular to a sodium hypochlorite delivery system. Background Art

[0002] Sodium hypochlorite is a commonly used oxidizing disinfectant in the production process of water plants. It has strong oxidizing properties and can effectively destroy the cell walls, cell membranes and enzyme systems of microorganisms, thereby achieving the effects of sterilization and algaecide. It also has the ability to continuously disinfect, so it is widely used in the disinfection process of domestic water plants.

[0003] During the production process of a water plant, the residual chlorine value of the water leaving the plant usually needs to be maintained between 0.3 and 2.0. The current common sodium hypochlorite delivery system includes dispensing equipment, variable frequency delivery pumps, flow meters and residual chlorine meters for water leaving the plant. The delivery methods are generally divided into manual delivery and automatic delivery. Traditional manual delivery relies on the water plant operators to manually adjust the delivery pump frequency based on experience to adjust the amount of sodium hypochlorite delivered. However, this method has the problems of long dispensing time, low labor efficiency and high experience requirements. It is easy for human negligence or misjudgment of experience to cause the residual chlorine value of the water leaving the plant to fail to meet the standard. Automatic delivery is based on the flow meter at the water inlet end of the sedimentation tank and the numerical value of the residual chlorine meter for water leaving the plant. Feedforward and feedback control is performed, and the amount of sodium hypochlorite delivered is controlled by automatic dosing equipment. However, due to the small number of control variables, the amount of sodium hypochlorite to be added depends solely on the flow meter at the inlet end of the sedimentation tank and the residual chlorine meter at the factory water, which often leads to low control accuracy. For example, the use of the flow meter at the inlet end of the sedimentation tank as the basis for the addition of sodium hypochlorite has the problem of inaccurate feedforward, and the residual chlorine meter at the factory water has the problem of strong lag. These factors will lead to the problem of insufficient accuracy of the amount of sodium hypochlorite added and large fluctuations in the residual chlorine value of the factory water. Therefore, the existing sodium hypochlorite addition system, whether manual or automatic, has the problem of low sodium hypochlorite addition accuracy, which not only wastes the agent but also directly leads to the residual chlorine value of the factory water not meeting the standard, and cannot kill bacteria, viruses and other pathogenic organisms in the water, bringing hidden dangers to water safety. Utility Model Content

[0004] The utility model aims to provide a sodium hypochlorite delivery system to solve the technical problem of insufficient accuracy of sodium hypochlorite delivery in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides a sodium hypochlorite delivery system, comprising a first water pump, a sedimentation tank, a filtering tank, a clean water tank and a second water pump connected in sequence, and also comprising a sodium hypochlorite delivery device, a first flow meter, a second flow meter, a first residual chlorine meter, a second residual chlorine meter and a third residual chlorine meter, the first flow meter is arranged at the water outlet of the first water pump, the second flow meter is arranged at the water outlet of the filtering tank, the first residual chlorine meter is arranged at the water inlet of the clean water tank, the second residual chlorine meter is arranged at the water outlet of the clean water tank, the third residual chlorine meter is arranged at the water outlet of the second water pump, the first output end of the sodium hypochlorite delivery device is connected to the water inlet end of the sedimentation tank, and the second output end of the sodium hypochlorite delivery device is connected to the water inlet end of the clean water tank.

[0006] Furthermore, the sodium hypochlorite delivery device includes a sodium hypochlorite configuration device and an automatic sodium hypochlorite delivery device, and the output end of the sodium hypochlorite configuration device is connected to the input end of the automatic sodium hypochlorite delivery device.

[0007] Furthermore, the automatic sodium hypochlorite dispensing device also includes a PLC controller, and the PLC controller is communicatively connected with the first flow meter, the second flow meter, the first residual chlorine meter, the second residual chlorine meter, and the third residual chlorine meter.

[0008] Furthermore, it also includes a flow cut-off sensor, which is arranged at the second output end of the automatic sodium hypochlorite delivery device, and the flow cut-off sensor is communicatively connected with the PLC sensor.

[0009] Furthermore, it also includes an alarm device, which is communicatively connected to the PLC controller and is used to send out an alarm signal when the data of the cut-off sensor, the first residual chlorine meter, the second residual chlorine meter, and the third residual chlorine meter are abnormal.

[0010] Furthermore, the clean water tanks are provided with multiple ones, each of which is provided with multiple water outlets, and each of the multiple water outlets is provided with a second residual chlorine meter.

[0011] Furthermore, the second flow meter is an ultrasonic flow meter.

[0012] Furthermore, it also includes a third water pump, and the water inlet end of the third water pump is connected to the water outlet end of the filter tank.

[0013] The beneficial effects of the utility model include:

[0014] 1. The sodium hypochlorite delivery system provided by the utility model is provided with a second flow meter, a first residual chlorine meter and a second residual chlorine meter on the basis of the traditional system. By arranging the second flow meter at the water outlet of the filter tank, the water inlet flow of the clean water tank is monitored by the second flow meter. In actual use, the flow rate is compared by the first flow meter and the second flow meter, which can be used as an effective basis for controlling the delivery amount of the first output end and the second output end of the sodium hypochlorite delivery device, thereby improving the accuracy of sodium hypochlorite delivery. At the same time, the residual chlorine values ​​at the water inlet and the water outlet of the clean water tank are monitored by the first residual chlorine meter and the second residual chlorine meter. Compared with the existing sodium hypochlorite delivery device which only monitors the residual chlorine value at the outlet water, the sodium hypochlorite delivery device of the sodium hypochlorite delivery system provided by the application can timely detect the changes in the residual chlorine values ​​at both ends of the system clean water tank, thereby judging the consumption of sodium hypochlorite, and assisting in adjusting the delivery amount of sodium chlorate, so that the residual chlorine value of the outlet water tends to be stable, and ensures that the residual chlorine value of the outlet water does not exceed the upper and lower limits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the overall structure of a sodium hypochlorite delivery system provided by an embodiment of the utility model;

[0017] Figure 2 A schematic diagram of the control structure of the sodium hypochlorite delivery system provided in an embodiment of the utility model;

[0018] Icons: 100-first water pump, 110-first flow meter, 200-sedimentation tank, 300-filtration tank, 310-second flow meter, 400-clear water tank, 410-first residual chlorine meter, 420-second residual chlorine meter, 500-second water pump, 510-third residual chlorine meter, 600-sodium chlorate configuration device, 610-sodium hypochlorite automatic dosing device, 611-interruption sensor, 700-third water pump. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. It should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0021] See also Figure 1 to Figure 2 As shown, at least one embodiment of the present disclosure provides a sodium hypochlorite delivery system, comprising a first water pump 100, a sedimentation tank 200, a filtering tank 300, a clean water tank 400 and a second water pump 500 connected in sequence, and also comprising a sodium hypochlorite delivery device, a first flow meter 110, a second flow meter 310, a first residual chlorine meter 410, a second residual chlorine meter 420 and a third residual chlorine meter 510, wherein the first flow meter 110 is arranged at the water outlet of the first water pump 100, the second flow meter 310 is arranged at the water outlet of the filtering tank 300, the first residual chlorine meter 410 is arranged at the water inlet of the clean water tank 400, the second residual chlorine meter 420 is arranged at the water outlet of the clean water tank 400, the third residual chlorine meter 510 is arranged at the water outlet of the second water pump 500, the first output end of the sodium hypochlorite delivery device is connected to the water inlet of the sedimentation tank 200, and the second output end of the sodium hypochlorite delivery device is connected to the water inlet of the clean water tank 400;

[0022] In the prior art, it is inaccurate to control the amount of sodium hypochlorite by feedforward based on the raw water flow of the water plant. Since the post-chlorination point (the second output end of the sodium hypochlorite dosing device) is located at the front end of the clean water tank 400 (the rear end of the filter tank 300), the inlet flow of the clean water tank 400 (the outlet flow of the filter tank 300) should be used as the feedforward for the addition of sodium hypochlorite. However, this flow is affected by factors such as the backwashing of the filter tank and is not equivalent to the flow detected by the first flow meter 110. To solve this problem, a second flow meter 310 is provided; the second flow meter 310 can obtain accurate flow data as the main basis for the post-chlorination point, thereby improving the accuracy of sodium hypochlorite dosing.

[0023] Specifically, the first water pump 100 is used to extract untreated raw water, which is precipitated in the sedimentation tank 200, filtered in the filter tank 300, and finally enters the clean water tank 400; the sodium hypochlorite delivery device is used to deliver sodium hypochlorite into the process tank and the clean water tank 400, thereby controlling the residual chlorine value of the factory water; the number of the clean water tanks 400 can be configured according to actual needs; the sodium hypochlorite delivery system provided in this embodiment is provided with a second flow meter 310, a first residual chlorine meter 410 and a second residual chlorine meter 420 on the basis of the traditional system, and the second flow meter 310 is provided at the water outlet of the filter tank 300, and the water inlet flow of the clean water tank 400 is monitored by the second flow meter 310; in actual application When the flow rate is compared with the first flow meter 110 and the second flow meter 310, it can be used as an effective basis for controlling the amount of sodium hypochlorite delivery at the first output end and the second output end of the sodium hypochlorite delivery device, thereby improving the accuracy of sodium hypochlorite delivery; at the same time, the first residual chlorine meter 410 and the second residual chlorine meter 420 are used to monitor the residual chlorine values ​​at the water inlet and the water outlet of the clean water tank 400. Compared with the existing sodium hypochlorite delivery device that only monitors the residual chlorine value at the outlet water, the sodium hypochlorite delivery device of the sodium hypochlorite delivery system provided by the present application can timely detect the changes in the residual chlorine values ​​at both ends of the system clean water tank 400, and then judge the consumption of sodium hypochlorite, and assist in adjusting the delivery amount of sodium chlorate, so that the residual chlorine value of the outlet water tends to be stable, ensuring that the residual chlorine value of the outlet water does not exceed the upper and lower limits.

[0024] Preferably, the sodium hypochlorite delivery device comprises a sodium hypochlorite configuration device 600 and an automatic sodium hypochlorite delivery device 610, wherein the output end of the sodium hypochlorite configuration device 600 is connected to the input end of the automatic sodium hypochlorite delivery device 610; specifically, the sodium hypochlorite configuration device 600 is responsible for configuring solid sodium hypochlorite into a solution to ensure that the concentration of sodium hypochlorite in the solution meets the requirements; the output end of the sodium hypochlorite configuration device 600 is connected to the input end of the automatic sodium hypochlorite delivery device 610 through a pipeline; the automatic sodium hypochlorite delivery device 610 automatically controls the delivery amount of the sodium hypochlorite solution according to the water quality monitoring data and the set delivery parameters to ensure that the water quality disinfection meets the standard requirements; the system monitors the water quality parameters in real time through various monitoring devices, such as the first flow meter 110, the second flow meter 310, the first residual chlorine meter 410, the second residual chlorine meter 420 and the third residual chlorine meter 510 to monitor each part The residual chlorine value and flow data are fed back to the automatic sodium hypochlorite delivery device 610 to realize intelligent control; wherein, the automatic sodium hypochlorite delivery device 610 also includes a PLC controller, and the PLC controller is communicated with the first flow meter 110, the second flow meter 310, the first residual chlorine meter 410, the second residual chlorine meter 420, and the third residual chlorine meter 510; the PLC controller is configured to receive water quality parameter data from the monitoring equipment in real time; the PLC controller automatically adjusts the delivery amount of sodium hypochlorite according to the received data, combined with the preset delivery parameters and control logic, to ensure that the water quality disinfection effect meets the standard requirements; the PLC realizes feedforward, feedback, auxiliary feedforward, and auxiliary feedback adjustment for the delivery amount of sodium hypochlorite according to the real-time collected data, combined with conventional control algorithms in the prior art such as average value algorithm, deviation value correction, fault abnormality judgment, etc., to ensure the stability of the water quality disinfection effect;

[0025] Preferably, a flow interruption sensor 611 is further included, and the flow interruption sensor 611 is arranged at the second output end of the automatic sodium hypochlorite delivery device 610, and the flow interruption sensor 611 is communicatively connected with the PLC sensor; specifically, the flow interruption sensor 611 is used to detect flow interruption caused by pipeline blockage and the like. By adding the flow interruption sensor 611, the system can timely detect flow interruption caused by pipeline blockage and the like, avoid interruption of sodium hypochlorite delivery, and ensure the continuity and stability of water disinfection work;

[0026] Preferably, an alarm device is further included, the alarm device is communicatively connected with the PLC controller, and the alarm device is used to send out an alarm signal when the data of the flow interruption sensor 611, the first residual chlorine meter 410, the second residual chlorine meter 420, and the third residual chlorine meter 510 are abnormal; for example, when the alarm device detects that the data of any of the monitoring devices is abnormal, such as the flow interruption sensor 611 finds that the pipeline is interrupted, and the residual chlorine meter detects that the residual chlorine concentration is abnormal, it will immediately send out an audible and visual alarm signal; after receiving the alarm signal, the PLC controller can perform corresponding processing, such as stopping the delivery of sodium hypochlorite, notifying relevant personnel to carry out maintenance, etc.;

[0027] Preferably, the clean water tank 400 is provided with a plurality of them, each of which is provided with a plurality of water outlets, and each of the plurality of water outlets is provided with a second residual chlorine meter 420; specifically, according to the actual situation of the water plant, a plurality of second residual chlorine meters 420 can be added at the water outlet of the clean water tank 400 to measure the residual chlorine value after the tap water and sodium hypochlorite are fully mixed and reacted in the clean water tank 400. The purpose of adding a residual chlorine meter at this position is that the second residual chlorine meter 420 can be used as an auxiliary feedback to reduce the fluctuation of the residual chlorine value. This point is located at the front end of the third residual chlorine meter 510, PL The C controller can realize early response and promote the residual chlorine value curve of the factory water to be stable; at the same time, if the third residual chlorine meter 510 has an abnormality, the second residual chlorine meter 420 can also replace it to complete the automatic control of chlorination; the first residual chlorine meter 410 is used to measure the residual chlorine value at the water inlet end of the clean water tank 400. By comparing with the second residual chlorine meter 420, the consumption of sodium hypochlorite in the clean water tank 400 (the decay speed of the residual chlorine value) can be determined, and then used as auxiliary feedback to determine the minimum and maximum dosage of sodium hypochlorite to ensure that the residual chlorine value of the factory water does not exceed the upper and lower limits.

[0028] Preferably, the second flow meter 310 is an ultrasonic flow meter; the ultrasonic flow meter can realize real-time and accurate monitoring of the water flow rate of the clean water tank 400, and the data collected by the ultrasonic flow meter can be used for the PLC controller to calculate the amount of sodium hypochlorite to be added;

[0029] Preferably, a third water pump 700 is further included, and the water inlet end of the third water pump 700 is connected to the water outlet end of the filter tank 300; specifically, the third water pump 700 is used to pump backwash water; the third water pump 700 pumps the backwash water out of the filter tank 300, and discharges it to a designated treatment facility through a pipeline to complete the backwash cleaning process of the filter tank 300; after the backwash cleaning is completed, the third water pump 700 stops working, and the system returns to normal operation.

[0030] In summary, the present application solves the problems of unstable and fluctuating dosage and residual chlorine value control in traditional chlorination methods, realizes automatic and accurate disinfectant addition, replaces the original manual operation mode, reduces the operating difficulty of operators, and avoids various safety hazards and social impacts caused by manual dosing, such as excessive residual chlorine values ​​and excessive microbial indicators, thereby improving the production safety of water plants and the level of automation of water plants.

[0031] In addition to the above description, there are a few points to note:

[0032] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure, and other structures may refer to the general design;

[0033] (2) The control procedures for sensors, sodium hypochlorite dosage, etc. in the present disclosure are all mature conventional technologies in the prior art. Those skilled in the art can realize the application of the present utility model based on the principle of the same function in the prior art. The program part is not the innovative point of the present utility model;

[0034] (3) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0035] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A sodium hypochlorite delivery system, comprising a first water pump (100), a sedimentation tank (200), a filtration tank (300), a clean water tank (400) and a second water pump (500) connected in sequence, characterized in that: The invention also comprises a sodium hypochlorite dosing device, a first flow meter (110), a second flow meter (310), a first residual chlorine meter (410), a second residual chlorine meter (420) and a third residual chlorine meter (510), wherein the first flow meter (110) is arranged at the water outlet of the first water pump (100), the second flow meter (310) is arranged at the water outlet of the filter tank (300), the first residual chlorine meter (410) is arranged at the water inlet of the clean water tank (400), the second residual chlorine meter (420) is arranged at the water outlet of the clean water tank (400), and the third residual chlorine meter (510) is arranged at the water outlet of the second water pump (500); the first output end of the sodium hypochlorite dosing device is connected to the water inlet of the sedimentation tank (200), and the second output end of the sodium hypochlorite dosing device is connected to the water inlet of the clean water tank (400).

2. The sodium hypochlorite delivery system according to claim 1, characterized in that: The sodium hypochlorite delivery device comprises a sodium hypochlorite configuration device (600) and an automatic sodium hypochlorite delivery device (610), wherein the output end of the sodium hypochlorite configuration device (600) is connected to the input end of the automatic sodium hypochlorite delivery device (610).

3. The sodium hypochlorite delivery system according to claim 2, characterized in that: The automatic sodium hypochlorite delivery device (610) comprises a PLC controller, and the PLC controller is communicatively connected with a first flow meter (110), a second flow meter (310), a first residual chlorine meter (410), a second residual chlorine meter (420), and a third residual chlorine meter (510).

4. The sodium hypochlorite delivery system according to claim 3, characterized in that: It also includes a flow cut-off sensor (611), which is arranged at the second output end of the automatic sodium hypochlorite delivery device (610), and the flow cut-off sensor (611) is communicatively connected to the PLC sensor.

5. The sodium hypochlorite delivery system according to claim 4, characterized in that: It also includes an alarm device, which is in communication with the PLC controller and is used to send out an alarm signal when data from the cut-off sensor (611), the first residual chlorine meter (410), the second residual chlorine meter (420), and the third residual chlorine meter (510) are abnormal.

6. The sodium hypochlorite delivery system according to any one of claims 1 to 5, characterized in that: The clean water tank (400) is provided in plurality, each of the plurality of clean water tanks (400) is provided with a plurality of water outlets, and each of the plurality of water outlets is provided with a second residual chlorine meter (420).

7. The sodium hypochlorite delivery system according to claim 6, characterized in that: The second flow meter (310) is an ultrasonic flow meter.

8. The sodium hypochlorite delivery system according to claim 7, characterized in that: It also includes a third water pump (700), wherein the water inlet end of the third water pump (700) is connected to the water outlet end of the filter tank (300).

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