An automatic feeding device for chlorine dioxide generator disinfectant solution

Abstract

The utility model discloses a kind of automatic adding device for chlorine dioxide generator disinfectant, it is related to chlorine dioxide preparation technical field, including chlorine dioxide generator, water jet, disinfectant storage tank and adding pump, chlorine dioxide generator generates gas, water jet is connected with it to generate disinfectant, flow into the disinfectant storage tank in lower portion by means of gravity, adding pump again transports disinfectant to multiple adding points;Compared with traditional mode, the utility model isolates water jet and adding point of complex working condition, avoids water jet back pressure too high, guarantees its suction capacity, makes chlorine dioxide generator stable operation, and adding pump can overcome delivery resistance, ensure disinfectant stable delivery, simultaneously, the device changes the problem that adding amount is difficult to control due to air mixing in traditional adding mode, by controlling the delivery amount of adding pump, let the chlorine dioxide amount distribution of each adding point be more reasonable, effectively solve the deficiency existing in traditional adding mode, ensure that disinfection effect is stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of chlorine dioxide preparation technology, specifically to an automatic dosing device for disinfectant solution in a chlorine dioxide generator. Background Technology

[0002] The raw materials used in the operation of a chlorine dioxide generator mainly include sodium chlorate, sulfuric acid (or hydrochloric acid), and reducing agents such as hydrogen peroxide, urea, and sucrose. Compound sodium chlorate and compound sodium bisulfate can also be used. To ensure the safe operation of the chlorine dioxide generator, a large amount of air (or steam) is needed to dilute the chlorine dioxide concentration to below 10% during production.

[0003] Traditional chlorine dioxide generators used in domestic water treatment typically have a water jet injector mounted on the generator body or on the wall behind it. The disinfectant solution generated by the injector is then added to various points in the water to be treated. However, many water treatment companies face a series of challenges: the distance between the chlorine dioxide disinfectant injection points and the equipment is often considerable, with significant height differences, and some injection points are under pressure (e.g., when adding to pipes). These factors increase the back pressure of the water jet injector, weakening its suction capacity. This significantly reduces the amount of air entering the generator during operation, preventing the chlorine dioxide concentration inside from dropping below 10%, leading to chlorine dioxide decomposition and ultimately rendering the generator unusable.

[0004] Furthermore, the water jet injector is installed on the chlorine dioxide generator or on the wall behind the generator. The resulting disinfectant solution contains a large amount of air. When multiple points are added at the water treatment site, it is difficult to accurately distribute the amount of chlorine dioxide to each point, which ultimately leads to unstable disinfection effect. This not only affects the quality of water treatment, but also increases operating costs and safety risks. Utility Model Content

[0005] The purpose of this invention is to provide an automatic dosing device for disinfectant in a chlorine dioxide generator. This device first converts chlorine dioxide gas into disinfectant through a water jet injector and then stores it in a disinfectant storage tank. Finally, it uses a dosing pump to achieve precise dosing at multiple dosing points, solving the problems of unstable operation and inaccurate dosing in existing processes. It is particularly suitable for complex scenarios such as municipal water supply and sewage treatment.

[0006] This utility model is achieved through the following technical solution:

[0007] An automatic dosing device for disinfectant solution in a chlorine dioxide generator, comprising:

[0008] A chlorine dioxide generator, wherein the chlorine dioxide generator is used to generate chlorine dioxide gas;

[0009] A water jet injector is connected to the outlet of the chlorine dioxide generator and generates a disinfectant solution by outputting gas from the outlet of the chlorine dioxide generator.

[0010] A disinfectant storage tank is located below the water jet injector and connected to the outlet of the water jet injector, and is used to store the disinfectant solution generated by the water jet injector.

[0011] A dosing pump is connected to the bottom of the disinfectant storage tank and delivers the disinfectant from the storage tank to multiple dosing points.

[0012] In this solution, a chlorine dioxide generator is responsible for producing chlorine dioxide gas. A water jet injector is connected to the generator's outlet to mix the chlorine dioxide gas output by the generator with water to produce a usable disinfectant solution, thus realizing the conversion from gas to disinfectant solution. The disinfectant solution storage tank located below the water jet injector allows the disinfectant solution to flow in naturally by gravity, playing a storage and buffering role and ensuring a continuous and stable supply of disinfectant solution. The dosing pump is connected to the disinfectant solution storage tank and can accurately deliver the stored disinfectant solution to multiple dosing points to meet the disinfection needs of different locations. Therefore, from an overall perspective, this device isolates the water jet injector from pressure-prone, distant, or height-different injection points by setting up a disinfectant storage tank below the injector. This prevents the injection point pressure from directly acting on the water jet injector, reduces the increase in back pressure of the injector, ensures its suction capacity, and allows the chlorine dioxide generator to operate normally. At the same time, the injection pump can overcome the transport resistance to stably deliver the disinfectant to each injection point. The stable disinfectant storage tank, combined with the injection pump that can accurately control the delivery volume, changes the traditional water jet injector method of injecting disinfectant with a large amount of air and making it difficult to control. This makes the distribution of chlorine dioxide at each injection point more reasonable and ensures stable disinfection effect.

[0013] As a further embodiment of the automatic dosing device, the automatic dosing device also includes a storage tank exhaust pipe, the two ends of which are respectively connected to the air inlet of the chlorine dioxide generator and the top of the disinfectant storage tank.

[0014] In this design, the two ends of the storage tank exhaust pipe are connected to the inlet of the chlorine dioxide generator and the top of the disinfectant storage tank, respectively. This allows the chlorine dioxide gas volatilized in the disinfectant storage tank to flow back to the chlorine dioxide generator through the pipe. On the one hand, this improves the utilization rate of chlorine dioxide, avoids waste caused by gas volatilization, and reduces raw material costs. On the other hand, it reduces the accumulation of chlorine dioxide gas in the disinfectant storage tank, lowering the risk of excessive internal pressure and decomposition explosion due to increased chlorine dioxide concentration, thus improving the safety and stability of the device operation. Simultaneously, the returned chlorine dioxide can be reused in the generator, ensuring a continuous and stable chlorine dioxide supply, thereby maintaining the efficient operation and good disinfection effect of the entire automatic dosing device.

[0015] As a further embodiment of the automatic dosing device, the disinfectant storage tank is located 1.5m to 3.0m below the water jet injector.

[0016] In this design, the disinfectant storage tank is positioned 1.5m-3.0m below the water jet injector. This height difference allows the disinfectant generated by the water jet injector to flow smoothly into the storage tank using gravity, eliminating the need for an additional power unit. This saves energy and simplifies the equipment structure. Furthermore, this height range provides stable suction conditions for the water jet injector, ensuring it can efficiently and quickly extract chlorine dioxide gas from the chlorine dioxide generator and convert it into disinfectant. This avoids malfunctions caused by improper height, thus guaranteeing the safe and stable operation of the chlorine dioxide generator.

[0017] As a further embodiment of the automatic dosing device, the automatic dosing device also includes a level gauge and a PLC control system. The level gauge is connected to the disinfectant storage tank and transmits the liquid level signal in the disinfectant storage tank to the PLC control system. The PLC control system is electrically connected to the dosing pump.

[0018] In this solution, a level gauge monitors the liquid level in the disinfectant storage tank in real time and transmits the level signal to the PLC control system, enabling the PLC control system to monitor the liquid level in the tank in real time. When the liquid level reaches the set intermediate level, the dosing pump is started to deliver disinfectant to the dosing point; if the liquid level rises to the intermediate-high level, the operating frequency of the dosing pump is increased to accelerate the dosing of disinfectant and prevent the disinfectant from overflowing from the tank; when the liquid level drops to the intermediate-low level, the operating frequency of the dosing pump is reduced to prevent dry pumping, ensure the safe operation of the dosing pump, and maintain the liquid level within a suitable range.

[0019] As a further solution for the automatic dosing device, in order to adapt to different usage scenarios and needs and ensure the accuracy and reliability of liquid level monitoring in the automatic dosing device, the liquid level gauge is a differential pressure transmitter, a magnetic float liquid level gauge, or an ultrasonic liquid level gauge.

[0020] As a further embodiment of the automatic dosing device, the dosing pump delivers disinfectant to the dosing point through multiple independent branch pipelines, and each branch pipeline is equipped with an electric regulating valve. The PLC control system independently adjusts the opening degree of the electric regulating valve on the corresponding branch pipeline according to the residual chlorine feedback signal of each branch pipeline dosing point.

[0021] In this solution, since the demand for disinfectant and water quality vary at different dosing points, independent branch pipelines can avoid mutual interference between dosing points, ensuring that each point receives a suitable flow rate of disinfectant. The electric regulating valve can flexibly adjust the amount of disinfectant added by adjusting the opening, while the PLC control system performs real-time regulation based on the residual chlorine feedback signal, forming a closed-loop control. It can dynamically adjust the dosing amount according to the actual disinfection effect, ensuring that the residual chlorine content at each dosing point is always maintained within a suitable range, guaranteeing the stability and reliability of the disinfection effect, improving the ability of the entire automatic dosing device to cope with complex working conditions, and effectively solving the problem of uneven chlorine dioxide distribution in traditional dosing methods.

[0022] As a further embodiment of the automatic dosing device, a one-way valve is provided between the outlet of the dosing pump and the dosing pipeline.

[0023] In this design, the check valve prevents the disinfectant in the dosing pipeline from flowing back into the dosing pump and the disinfectant storage tank. This avoids a series of problems that could be caused by backflow.

[0024] As a further embodiment of the automatic dosing device, a flow meter is also installed on each of the branch pipes. The flow meter is located downstream of the electric regulating valve. The PLC control system adjusts the opening degree of the electric regulating valve on the corresponding branch pipe according to the residual chlorine feedback signal at each branch pipe dosing point and the flow signal of the flow meter.

[0025] In this system, the residual chlorine feedback signal reflects the actual disinfection effect at the dosing point, while the flow meter's flow signal displays the real-time dosage of disinfectant in the current branch pipeline. The PLC control system integrates these two signals to determine whether the current dosage meets the actual disinfection requirements. If the residual chlorine content does not meet the standard and the flow signal indicates insufficient dosage, the PLC control system will increase the opening of the electric regulating valve to increase the disinfectant dosage; conversely, if the residual chlorine is too high or the flow rate is too large, the PLC control system will decrease the opening of the electric regulating valve to reduce the dosage. This method ensures that each dosing point receives a precise and appropriate amount of disinfectant under different operating conditions and water quality conditions, effectively improving the stability and reliability of the disinfection effect.

[0026] As a further embodiment of the automatic dosing device, the dosing pump is a variable frequency centrifugal pump or a variable frequency diaphragm pump.

[0027] As a further embodiment of the automatic dosing device, a pressure gauge is also connected to the outlet of the dosing pump, and the PLC control system adjusts the power of the dosing pump and the opening degree of the electric regulating valve through the pressure signal of the pressure gauge.

[0028] In this system, a pressure gauge monitors the outlet pressure of the dosing pump in real time. When the pressure fluctuates due to factors such as pipeline blockage or changes in resistance at the dosing point, the PLC control system quickly receives the signal. If the pressure is too high, the system reduces the power of the dosing pump and simultaneously increases the opening of the electric regulating valve to prevent the pipeline from being subjected to excessive pressure and to prevent safety accidents such as pipe bursts. If the pressure is too low, the system increases the power of the dosing pump and decreases the opening of the electric regulating valve to ensure that the disinfectant can be smoothly delivered to the dosing point. In this way, a closed-loop control is formed through pressure feedback, which not only ensures the stability of the pipeline pressure during the dosing process, but also enables the dosing pump and the electric regulating valve to work together to accurately adjust the amount of disinfectant added according to actual needs, thereby improving the reliability and adaptability of the entire dosing system and ensuring stable disinfection results.

[0029] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0030] 1. This utility model installs a water jet injector above the disinfectant storage tank, utilizing the height difference to ensure stable suction capacity and prevent the accumulation of chlorine dioxide gas inside the chlorine dioxide generator, ensuring its concentration remains stable within a safe range and reducing the risk of decomposition and explosion. Simultaneously, the tank's exhaust pipe recovers the chlorine dioxide gas volatilized from the top of the disinfectant storage tank back to the chlorine dioxide generator's inlet, reducing gas leakage and thus avoiding environmental pollution and potential safety hazards.

[0031] 2. The dosing pump of this utility model delivers disinfectant to the dosing point through multiple independent branch pipelines. Each branch pipeline is equipped with an electric regulating valve and a flow meter. The PLC control system automatically adjusts the opening of the electric regulating valve according to the residual chlorine feedback signal at each branch pipeline dosing point and the flow signal from the flow meter. This allows for precise control of the disinfectant dosage to meet the needs of different dosing points, solving the problem of uneven chlorine dioxide distribution in traditional multi-point dosing, ensuring stable disinfection effect at each dosing point, and meeting disinfection needs in different scenarios.

[0032] 3. In this invention, the level gauge works in conjunction with the PLC control system to monitor the liquid level in the disinfectant storage tank in real time and automatically control the operating frequency of the dosing pump according to the liquid level. When the liquid level reaches a medium-high level, the operating frequency of the dosing pump is increased; when the liquid level drops to a medium-low level, the operating frequency of the dosing pump is decreased, so that the liquid level is always maintained within a suitable range, preventing the storage tank from emptying or overflowing, and ensuring the continuous and stable operation of the dosing device. Attached Figure Description

[0033] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0034] Figure 1 This is a schematic diagram of the structure of this utility model.

[0035] The attached diagram shows the markings and corresponding component names:

[0036] 1-Disinfectant storage tank, 2-Level gauge, 3-Water jet injector, 4-Dosing pump, 5-Electric regulating valve, 6-Pressure gauge, 7-Flow meter, 8-First disinfectant pipe, 9-Second disinfectant pipe, 10-Storage tank exhaust pipe, 11-Chlorine dioxide gas outlet pipe, 12-PLC control system. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0038] Example 1

[0039] This embodiment 1 provides an automatic dosing device for disinfectant solution in a chlorine dioxide generator, such as... Figure 1 As shown, it mainly includes a chlorine dioxide generator, a water jet injector 3, a disinfectant storage tank 1, and a dosing pump 4;

[0040] Please see Figure 1 As shown, the chlorine dioxide generator is used to generate chlorine dioxide gas. The generated chlorine dioxide gas is connected to the water jet injector 3 through the chlorine dioxide gas outlet pipe 11. The water jet injector 3 mixes the chlorine dioxide gas output from the chlorine dioxide generator with water to make a usable disinfectant solution, realizing the conversion from gas to disinfectant solution. The generated disinfectant solution flows naturally into the disinfectant solution storage tank 1 through the second disinfectant solution pipe 9 under the action of gravity, thereby isolating the water jet injector 3 from the injection points that are pressurized, far away, or have a height difference, avoiding the direct action of the injection point pressure on the water jet injector 3. When the liquid level in the disinfectant solution storage tank 1 reaches the predetermined value, the injection pump 4 connected to the bottom of the disinfectant solution storage tank 1 delivers the disinfectant solution in the disinfectant solution storage tank 1 to multiple injection points. With the stable disinfectant solution storage tank 1 and the injection pump with controllable delivery volume, the traditional water jet injector 3 produces a large amount of air and is difficult to control in the disinfectant injection method, making the distribution of chlorine dioxide at each injection point more reasonable and ensuring stable disinfection effect.

[0041] Example 2

[0042] This embodiment 2 provides an automatic dosing device for disinfectant solution in a chlorine dioxide generator, such as... Figure 1 As shown, it mainly includes a chlorine dioxide generator, a water jet injector 3, a disinfectant storage tank 1, and a dosing pump 4;

[0043] Please see Figure 1 As shown, the chlorine dioxide generator produces chlorine dioxide gas. The generated chlorine dioxide gas is connected to the water jet injector 3 through the chlorine dioxide gas outlet pipe 11. The water jet injector 3, located 1.5m to 3.0m above the disinfectant storage tank 1, mixes the chlorine dioxide gas output from the chlorine dioxide generator with water to produce a usable disinfectant solution, realizing the conversion from gas to disinfectant solution. The generated disinfectant solution, under the action of gravity, flows naturally into the disinfectant storage tank 1 through the second disinfectant solution pipe 9 for storage, thereby isolating the water jet injector 3 from the injection point that is pressurized, far away, or has a height difference, avoiding pressure at the injection point. The water jet injector 3 and the dosing pump 4, which is connected to the bottom of the disinfectant storage tank 1, deliver the disinfectant in the disinfectant storage tank 1 to multiple dosing points. At the same time, a storage tank exhaust pipe 10 is connected between the air inlet of the chlorine dioxide generator and the top of the disinfectant storage tank 1. Air is introduced at the connection between the storage tank exhaust pipe 10 and the air inlet of the chlorine dioxide generator. Due to the air, the residual chlorine dioxide gas remaining at the top of the disinfectant storage tank 1 returns to the chlorine dioxide generator. This not only improves the utilization rate of chlorine dioxide, but also reduces the accumulation of chlorine dioxide gas in the disinfectant storage tank and reduces the risk of excessive internal pressure of the device.

[0044] Example 3

[0045] This embodiment 3 provides an automatic dosing device for disinfectant solution in a chlorine dioxide generator, based on embodiment 1 or embodiment 2. Figure 1 As shown, this embodiment also includes a level gauge 2 and a PLC control system 12. The level gauge 2 is connected to the disinfectant storage tank 1. The level gauge 2 is used to monitor the liquid level of the disinfectant storage tank 1 in real time. Here, it can be a differential pressure transmitter, a magnetic level gauge, or an ultrasonic level gauge, preferably a magnetic level gauge. The magnetic level gauge can not only feed the signal back to the control system, but also display the liquid level of the disinfectant storage tank locally, allowing on-site operators to observe it. The level gauge 2 transmits the liquid level signal in the disinfectant storage tank 1 to the PLC control system 12. When the liquid level reaches the set middle level, the dosing pump 4 is started to deliver disinfectant to the dosing point. If the liquid level rises to the middle-high level, the operating frequency of the dosing pump 4 is increased to speed up the dosing of disinfectant and prevent the disinfectant from overflowing from the storage tank. When the liquid level drops to the middle-low level, the operating frequency of the dosing pump 4 is reduced to prevent dry pumping and ensure the safe operation of the dosing pump 4, while maintaining the liquid level within a suitable range.

[0046] In this embodiment, the dosing pump 4 is a variable frequency centrifugal pump or a variable frequency diaphragm pump, which delivers the disinfectant to the dosing point through the first disinfectant pipe 8. At the outlet of the first disinfectant pipe 8, there are multiple independent branch lines. The number of branch lines can be selected according to actual needs. In this embodiment, two branch lines are set, and each branch line is connected to an electric regulating valve 5 and a flow meter 7. The flow meter 7 is located after the electric regulating valve 5. The PLC control system 12 adjusts the opening of the electric regulating valve 5 on the corresponding branch line according to the residual chlorine feedback signal of each branch dosing point and the flow signal of the flow meter 7. The principle is that the residual chlorine feedback signal reflects the actual disinfection effect at the dosing point, while the flow signal of the flow meter 7 displays the amount of disinfectant added in the current branch line in real time. By combining these two signals, the PLC control system 12 can determine whether the current dosing amount meets the actual disinfection requirements. If the residual chlorine content does not meet the standard and the flow signal indicates insufficient dosage, the PLC control system 12 will increase the opening of the electric regulating valve 5 to increase the dosage of disinfectant; conversely, if the residual chlorine is too high or the flow rate is too large, the PLC control system 12 will decrease the opening of the electric regulating valve 5 to reduce the dosage.

[0047] In some embodiments, a pressure gauge 6 is also connected to the outlet of the dosing pump 4. The pressure gauge 6 monitors the outlet pressure of the dosing pump 4 in real time. When the pressure fluctuates due to factors such as pipeline blockage or changes in resistance at the dosing point, the PLC control system 12 quickly acquires the signal. If the pressure is too high, the system reduces the power of the dosing pump and simultaneously reduces the opening of the electric regulating valve 5 to prevent the pipeline from bearing excessive pressure and to prevent safety accidents such as pipe bursts. If the pressure is too low, the system increases the power of the dosing pump and opens the electric regulating valve 5 to ensure that the disinfectant can be smoothly delivered to the dosing point.

[0048] In some embodiments, a one-way valve is provided between the outlet of the dosing pump 4 and the dosing pipeline. This one-way valve prevents the disinfectant in the dosing pipeline from flowing back into the dosing pump 4 and the disinfectant storage tank 1. This avoids a series of problems that may be caused by backflow.

[0049] In some implementation cases, there are two dosing pumps 4, which can be used in one and on standby, or both can be used simultaneously; there can be multiple dosing branch lines, such as 3-6, without affecting the implementation of this technical solution.

[0050] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An automatic dosing device for disinfectant solution in a chlorine dioxide generator, characterized in that, include: A chlorine dioxide generator, wherein the chlorine dioxide generator is used to generate chlorine dioxide gas; Water jet (3), the water jet (3) is connected to the gas outlet of the chlorine dioxide generator and forms a disinfectant solution with the gas output from the gas outlet of the chlorine dioxide generator; Disinfectant storage tank (1), the disinfectant storage tank (1) is located below the water jet (3) and is connected to the outlet of the water jet (3), and is used to store the disinfectant formed by the water jet (3); A dosing pump (4) is connected to the bottom of the disinfectant storage tank (1) and delivers the disinfectant in the disinfectant storage tank (1) to multiple dosing points.

2. The automatic dosing device for disinfectant solution in a chlorine dioxide generator according to claim 1, characterized in that, The automatic dosing device also includes a storage tank exhaust pipe (10), the two ends of which are connected to the air inlet of the chlorine dioxide generator and the top of the disinfectant storage tank (1), respectively.

3. The automatic dosing device for disinfectant solution in a chlorine dioxide generator according to claim 1, characterized in that, The disinfectant storage tank (1) is located 1.5m to 3.0m below the water jet (3).

4. An automatic dosing device for disinfectant solution in a chlorine dioxide generator according to any one of claims 1-3, characterized in that, The automatic dosing device also includes a level gauge (2) and a PLC control system (12). The level gauge (2) is connected to the disinfectant storage tank (1) and transmits the liquid level signal in the disinfectant storage tank (1) to the PLC control system (12). The PLC control system (12) is electrically connected to the dosing pump (4).

5. An automatic dosing device for disinfectant solution in a chlorine dioxide generator according to claim 4, characterized in that, The level gauge (2) is a differential pressure transmitter, a magnetic level gauge, or an ultrasonic level gauge.

6. An automatic dosing device for disinfectant solution in a chlorine dioxide generator according to claim 4, characterized in that, The dosing pump (4) delivers disinfectant to the dosing point through multiple independent branch lines, and each branch line is equipped with an electric regulating valve (5). The PLC control system (12) independently adjusts the opening degree of the electric regulating valve (5) on the corresponding branch line according to the residual chlorine feedback signal of each branch dosing point.

7. An automatic dosing device for disinfectant solution in a chlorine dioxide generator according to claim 6, characterized in that, A one-way valve is provided between the outlet of the dosing pump (4) and the dosing pipeline.

8. An automatic dosing device for disinfectant solution in a chlorine dioxide generator according to claim 7, characterized in that, Each of the branch pipes is also equipped with a flow meter (7), which is located behind the electric regulating valve (5). The PLC control system (12) adjusts the opening of the electric regulating valve (5) on the corresponding branch pipe according to the residual chlorine feedback signal of each branch pipe dosing point and the flow signal of the flow meter (7).

9. An automatic dosing device for disinfectant solution in a chlorine dioxide generator according to claim 8, characterized in that, The dosing pump (4) is a variable frequency centrifugal pump or a variable frequency diaphragm pump.

10. An automatic dosing device for disinfectant solution in a chlorine dioxide generator according to claim 9, characterized in that, A pressure gauge (6) is also connected to the outlet of the dosing pump (4). The PLC control system (12) adjusts the power of the dosing pump (4) and the opening of the electric regulating valve (5) through the pressure signal of the pressure gauge (6).

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