A flocculant multi-water source preparation and switching device

Abstract

The utility model relates to a flocculant multi -water source preparation and switching device relates to water treatment agent preparation technical field. The device includes preparation jar, stirring mechanism, at least two mutually independent water source input pipeline, one flocculant adding pipeline and control unit. Water source input pipeline is equipped with water source switching valve, flowmeter and water inlet control valve in proper order, and is connected preparation jar water inlet after converging into mixed water main. The flocculant adding pipeline is equipped with adding pump and adding flowmeter. Control unit and each valve, flowmeter, pump and stirring mechanism electric connection realize water source's automatic switching, preparation concentration's real -time regulation and control, liquid level interlock control and based on the optimization preparation program selection of water quality detection. The present application solves the problem of the prior art in the dependence single water source, preparation concentration fluctuation, low automation, realizes the flexible use of multi -water source and the stable, efficient, intelligent preparation of flocculant solution.

Description

Technical Field

[0001] This utility model relates to the field of water treatment agent preparation, and in particular to a flocculant preparation and switching device with multiple water sources. Background Technology

[0002] Flocculants are widely used chemical agents in water treatment processes to remove suspended particles, colloids, and other impurities from water, thereby improving water quality. In practical applications, flocculants usually need to be prepared into a solution of a certain concentration before being added to the water body to be treated. The stability and accuracy of the preparation process directly affect the effectiveness of the flocculant and the water treatment efficiency.

[0003] Currently, common flocculant preparation devices typically include a preparation tank and a stirring mechanism, and the water source is usually a single source, such as tap water or reclaimed water after specific treatment. This single-source preparation method lacks flexibility when the water quality fluctuates or the supply of a particular water source is interrupted, which may affect the stability of the prepared solution and even lead to a decrease in water treatment efficiency. In addition, during the preparation process, the control of the flocculant-to-water ratio often relies on manual experience or simple flow control, making it difficult to achieve precise and constant concentration control, and easily affected by factors such as fluctuations in water flow and changes in the performance of the dosing pump.

[0004] In terms of automation control, while existing devices may incorporate some basic level control or simple proportional adjustment, they often lack adaptability to changes in source water quality and the ability to automatically adjust preparation parameters based on water quality. Furthermore, they lack effective switching and control mechanisms for distributing the prepared flocculant solution to multiple application points. Therefore, there is an urgent need for a flocculant preparation device that can adapt to multiple water source conditions, achieve precise concentration control, and automatically optimize the preparation process based on water quality. Utility Model Content

[0005] To improve product quality and production efficiency, this utility model provides a flocculant multi-source preparation and switching device.

[0006] This utility model provides a flocculant preparation and switching device with multiple water sources, which adopts the following technical solution: A flocculant multi-source preparation and switching device includes a preparation tank and a stirring mechanism installed on the preparation tank. The device is characterized by further including at least two independent water source input pipelines and one flocculant dosing pipeline. Each water source input pipeline is sequentially equipped with a water source switching valve, a flow meter, and an inlet control valve. All water source input pipelines ultimately converge into a main mixed water pipe and are connected to the inlet of the preparation tank. The device also includes a control unit electrically connected to the water source switching valve, flow meter, inlet control valve, and stirring mechanism.

[0007] Preferably, the flocculant dosing pipeline is equipped with a dosing pump and a dosing flow meter, and the dosing pump and the dosing flow meter are electrically connected to the control unit.

[0008] Preferably, the control unit is configured to: receive a preset flocculant concentration value, and adjust the rotation speed of the dosing pump and / or the opening degree of the inlet control valve in real time according to the water flow signal fed back by the flow meter and the flocculant flow signal fed back by the dosing flow meter, so as to maintain a constant preparation concentration.

[0009] Preferably, a level gauge is installed in the preparation tank, and the level gauge is electrically connected to the control unit; the control unit is configured to close the water inlet control valve and the dosing pump when the liquid level reaches the high limit, and start the preparation program when the liquid level reaches the low limit, based on the signal from the level gauge.

[0010] Preferably, an online water quality analyzer is installed on the main mixing water pipe. The online water quality analyzer is used to detect at least the turbidity or pH value of the water and is electrically connected to the control unit.

[0011] Preferably, the control unit is configured to automatically select a preset optimized preparation program that matches the current water quality based on the feedback signal from the online water quality analyzer. The optimized preparation program includes a specified combination of water sources, a preparation concentration, and a stirring time.

[0012] Preferably, the outlet of the preparation tank is connected to at least two usage points via a liquid outlet pipeline, the liquid outlet pipeline is equipped with a liquid outlet pump, and a liquid outlet switching valve is installed on the branch leading to each usage point.

[0013] Preferably, the stirring mechanism is a side-wall agitator, and its impeller is a propeller impeller or a slanted blade turbine.

[0014] In summary, this utility model has at least one of the following beneficial technical effects: By employing at least two independent water source input pipelines and equipping them with water source switching valves, flow meters, and inlet control valves, combined with a control unit, flexible switching and accurate metering of multiple water sources are achieved, effectively addressing the problem of unstable supply or water quality fluctuations from a single water source, and improving the reliability and adaptability of the preparation system. By employing closed-loop control of the dosing pump, dosing flow meter, and control unit, the flow rates of water and flocculant can be monitored in real time and dynamically adjusted according to the preset concentration, thereby maintaining a constant concentration and improving the quality stability of the flocculant solution and the reliability of the water treatment effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a flocculant multi-source preparation and switching device.

[0016] Figure 2 This is a cross-sectional structural diagram of a flocculant multi-source preparation and switching device.

[0017] Explanation of reference numerals in the attached diagram: 1. Preparation tank; 2. Stirring mechanism; 3. Water input pipeline; 31. Switching valve; 32. Flow meter; 33. Inlet water control valve; 34. Mixed water main pipe; 4. Dosing pipeline; 41. Dosing pump; 42. Dosing flow meter; 5. Discharge pipeline; 51. Discharge pump; 52. Discharge switching valve; 6. Control unit. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to all the accompanying drawings. Example

[0019] This embodiment discloses a flocculant multi-source preparation and switching device, including a preparation tank 1, a stirring mechanism 2, two independent water source input pipelines 3, a flocculant dosing pipeline 4, and a control unit 6. The preparation tank 1 is a vertical cylindrical structure with a water inlet and a flocculant dosing port at the top and a liquid outlet at the bottom. The stirring mechanism 2 is fixedly installed at the top center of the preparation tank 1, and its stirring shaft extends into the bottom of the tank to stir and mix the liquid inside, ensuring uniform dissolution of the flocculant. The starting end of each water source input pipeline 3 is connected to a different water source, for example, one line connects to tap water and the other to a greywater recycling system. On each water source input pipeline 3, a water source switching valve 31, a flow meter 32, and an inlet control valve 33 are installed sequentially along the water flow direction. The water source switching valve 31 is used to manually or automatically switch the water source path; the flow meter 32 is used to monitor the instantaneous flow and cumulative flow of the water source in real time; and the inlet control valve 33 is used to adjust the inlet flow of the water source. The ends of the two water source input pipes 3 converge and connect to a mixing water main pipe 34, the outlet of which is connected to the water inlet at the top of the preparation tank 1. One end of the flocculant dosing pipe 4 is connected to the flocculant storage tank, and the other end is connected to the flocculant dosing port at the top of the preparation tank 1. The control unit 6 is a PLC controller, whose signal input terminal is electrically connected to each flow meter 32 via cable, and its control output terminal is electrically connected to each water source switching valve 31, each inlet control valve 33, and the drive motor of the stirring mechanism 2 via cable. The control unit 6 receives parameters set by the operator (such as target water source, preparation volume, etc.) and controls the operation of the water source switching valve 31 and the inlet control valve 33 according to the feedback signals from the flow meters 32, while simultaneously controlling the start and stop of the stirring mechanism 2.

[0020] The implementation principle of Example 1 is as follows: When a flocculant solution needs to be prepared, the operator sets the preparation parameters through the control unit 6, such as selecting tap water as the source and setting the preparation volume. The control unit 6 first opens the water source switching valve 31 and the inlet control valve 33 on the corresponding water source input pipeline 3, and simultaneously starts the stirring mechanism 2. After being measured by the flow meter 32, the water flows into the preparation tank 1 through the mixing water main pipe 34. The flow meter 32 transmits the water flow signal to the control unit 6 in real time. When the amount of water entering the preparation tank 1 reaches the set value, the control unit 6 closes the inlet control valve 33 to stop the water intake. During or after the water intake process, flocculant can be added to the flocculant addition pipeline 4 manually or by auxiliary equipment (not limited in claim 1). The stirring mechanism 2 continues to work to fully dissolve the flocculant and form a uniform flocculant solution. This example, by setting up multiple independently controllable water source input pipelines, achieves flexible selection and accurate measurement of the water source, laying the foundation for subsequent accurate preparation. Example

[0021] The difference in this embodiment is that a dosing pump 41 and a dosing flow meter 42 are added to the flocculant dosing pipeline 4. The dosing pump 41 is a metering pump for accurately delivering the flocculant concentrate. The dosing flow meter 42 is a mass flow meter or a volumetric flow meter for real-time monitoring of the flocculant dosing flow rate. Both the dosing pump 41 and the dosing flow meter 42 are electrically connected to the control unit 6. The control unit 6 is configured to receive a preset flocculant concentration value and, based on the water flow signal fed back by the flow meter 32 and the flocculant flow signal fed back by the dosing flow meter 42, adjust the rotation speed of the dosing pump 41 in real time (thus changing the flocculant dosage) and / or the opening degree of the inlet control valve 33 (thus fine-tuning the inlet water flow) through a built-in PID algorithm or other control algorithm, so that the flocculant to water dosing ratio remains constant, thereby maintaining the concentration of the flocculant solution in the preparation tank 1 at the set value. The implementation principle is as follows: the control unit 6 calculates the required instantaneous flocculant dosage based on the target concentration and real-time water flow rate, and achieves this by adjusting the rotation speed of the dosing pump 41. Simultaneously, the dosing flow meter 42 provides feedback, forming a closed-loop control to ensure accurate concentration. This embodiment solves the concentration fluctuation problem caused by manual dosing or simple proportional control. Example

[0022] The difference in this embodiment is the addition of a level gauge inside the preparation tank 1. The level gauge can be a float level gauge, a hydrostatic level gauge, or an ultrasonic level gauge, used to monitor the liquid level in the preparation tank 1 in real time. The level gauge is electrically connected to the control unit 6. The control unit 6 is configured to perform interlocking control based on the signal from the level gauge: when the liquid level reaches a preset high limit, the control unit 6 automatically closes the inlet control valve 33 and the dosing pump 41 (if present) to prevent overflow; when the liquid level reaches a preset low limit (e.g., after draining), the control unit 6 can automatically start a new round of preparation (i.e., open the inlet valve, start the dosing pump, and stir, etc.). This implementation principle adds liquid level safety protection and automatic start / stop functions, improving the automation level and operational safety of the device. If the level gauge and this interlocking control are omitted, manual monitoring of the liquid level is required, posing a risk of overflow or evacuation. Example

[0023] The difference in this embodiment lies in the addition of an online water quality monitor to the mixing water main 34. The online water quality monitor is used to detect at least the turbidity or pH value of the water, for example, by employing a turbidity sensor and / or a pH sensor. The online water quality monitor is electrically connected to the control unit 6. The control unit 6 has pre-stored various optimized formulation programs for different water quality conditions. Each program is associated with a specific combination of water sources (e.g., prioritizing low-turbidity water sources), flocculant concentration (e.g., higher concentration for high-turbidity raw water), and stirring time (e.g., extending stirring to ensure dissolution when the water quality is complex). The control unit 6 is configured to automatically select and execute the matching optimized formulation program based on the real-time water quality signal (e.g., turbidity value) fed back by the online water quality monitor. This implementation principle expands the device's intelligent adaptability, enabling it to automatically adjust operating parameters according to the influent water quality to optimize the flocculant formulation effect and improve subsequent water treatment efficiency. Example

[0024] The difference in this embodiment is that the outlet of the preparation tank 1 is connected to two usage points (e.g., two different sedimentation tank addition points) via a liquid outlet pipeline 5. A liquid outlet pump 51 is installed on the liquid outlet pipeline 5 to pump the prepared flocculant solution to the usage point. A liquid outlet switching valve 52 is installed on a branch leading to each usage point to select which usage point to supply the solution to. The liquid outlet pump 51 and the liquid outlet switching valve 52 can be connected to the control unit 6 to achieve automatic switching and delivery. This implementation principle enables flexible connection between the preparation device and multiple water usage points, improving equipment utilization and liquid supply flexibility. If only one usage point is connected, the liquid outlet switching valve 52 is not required. Example

[0025] The difference in this embodiment is that the stirring mechanism 2 uses a side-wall agitator, which is installed on the side wall of the preparation tank 1, rather than at the top center. Its impeller can be a propeller impeller, primarily generating axial flow, suitable for homogenization and blending; or it can be an inclined-blade turbine, generating strong radial flow and shear force, suitable for dispersing and dissolving solid particles. Side-wall mounting can sometimes avoid having a large hole at the top center of the tank, or it is suitable for specific tank types. The implementation principle is to adapt to different mixing requirements and equipment layout needs by changing the installation position of the agitator and the impeller type. Top-center mounted agitators are common, and the side-wall type is an equivalent alternative.

[0026] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A flocculant multi-source preparation and switching device, comprising a preparation tank (1) and a stirring mechanism (2) disposed on the preparation tank (1), characterized in that, It also includes at least two independent water source input pipelines (3) and one flocculant dosing pipeline (4); each of the water source input pipelines (3) is equipped with a water source switching valve (31), a flow meter (32) and an inlet control valve (33) in sequence, and each water source input pipeline (3) eventually merges into a mixed water main pipe (34) and is connected to the inlet of the preparation tank (1); the device also includes a control unit (6), which is electrically connected to the water source switching valve (31), the flow meter (32), the inlet control valve (33) and the stirring mechanism (2).

2. The flocculant multi-source preparation and switching device according to claim 1, characterized in that, The flocculant dosing pipeline (4) is equipped with a dosing pump (41) and a dosing flow meter (42), which are electrically connected to the control unit (6).

3. The flocculant multi-source preparation and switching device according to claim 2, characterized in that, The control unit (6) is configured to receive a preset flocculant concentration value and, based on the water flow signal fed back by the flow meter (32) and the flocculant flow signal fed back by the dosing flow meter (42), adjust the rotation speed of the dosing pump (41) and / or the opening degree of the inlet control valve (33) in real time to maintain a constant preparation concentration.

4. The flocculant multi-source preparation and switching device according to claim 1, characterized in that, The preparation tank (1) is equipped with a level gauge, which is electrically connected to the control unit (6). The control unit (6) is configured to close the water inlet control valve (33) and the dosing pump (41) when the liquid level reaches the high limit, and to start the preparation program when the liquid level reaches the low limit, based on the signal from the level gauge.

5. The flocculant multi-source preparation and switching device according to claim 1, characterized in that, An online water quality detector is installed on the main water pipe (34). The online water quality detector is used to detect at least the turbidity or pH value of the water and is electrically connected to the control unit (6).

6. The flocculant multi-source preparation and switching device according to claim 5, characterized in that, The control unit (6) is configured to automatically select a preset optimized preparation program that matches the current water quality based on the feedback signal from the online water quality analyzer. The optimized preparation program includes a specified combination of water sources, preparation concentration, and stirring time.

7. The flocculant multi-source preparation and switching device according to claim 1, characterized in that, The outlet of the preparation tank (1) is connected to at least two usage points through a liquid outlet pipeline (5). The liquid outlet pipeline (5) is equipped with a liquid outlet pump (51) and a liquid outlet switching valve (52) is provided on the branch leading to each usage point.

8. The flocculant multi-source preparation and switching device according to claim 1, characterized in that, The stirring mechanism (2) is a side-wall agitator, and its impeller is a propulsion impeller or a slanted blade turbine.

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