Alum flower detection and automatic dosing control system

Abstract

The utility model relates to a kind of alum flower detection and automatic dosing control system, the system includes alum flower detection device, automatic dosing device and control device;The alum flower detection device includes shell, the shell inside is equipped with alum flower sedimentation area, alum flower buffer area and supernatant area;The supernatant area is provided with transmittance detector or turbidity detector, the alum flower buffer area is provided with alum flower reaction area water inlet, the alum flower sedimentation area is provided with sediment sludge discharge pipe;The automatic dosing device includes water turbidimeter, alum flower detector, water temperature meter, water flowmeter and dosing cabinet;The water turbidimeter, the alum flower detector, the water temperature meter and the water flowmeter are connected with automatic dosing control system respectively;The control device includes PLC / DCS controller, and the PLC / DCS controller is connected with the dosing cabinet.The utility model system can real-time response alum flower and water separation effect, and realize automatic dosing.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, specifically to a floc detection and automatic dosing control system. Background Technology

[0002] In water treatment, chemical dosing refers to adding chemical agents to water to alter its chemical properties, achieving purposes such as water purification, sterilization, disinfection, and corrosion prevention. Flocculent material (lump) is a visible particulate flocculent substance that appears in water after the addition of water treatment agents. It can settle and remove impurities from the water, exhibiting a good purification effect.

[0003] Currently, there are two methods for detecting the separation effect of alum floc and water in my country's water treatment processes: the first is to detect the separation effect by taking samples from a beaker; the other is to collect images of the alum floc, establish an image database, and use algorithms to identify the alum floc effect. Both methods can detect the separation effect of alum floc and water, but they cannot monitor the separation effect of alum floc and water in the chemical reaction zone in real time, nor can they achieve automatic chemical dosing. Utility Model Content

[0004] The purpose of this invention is to provide a floc detection and automatic dosing control system. This system can reflect the separation effect of floc and water in real time and realize automatic dosing.

[0005] To achieve the above objectives, this utility model provides a floc detection and automatic dosing control system. The system includes a floc detection device, an automatic dosing device, and a control device. The floc detection device includes a housing, inside which are a floc sedimentation zone, a floc buffer zone, and a supernatant zone. The supernatant zone is equipped with a transmittance / turbidity meter. The floc buffer zone is equipped with a floc reaction zone inlet, and the floc sedimentation zone is equipped with a sludge discharge pipe. The automatic dosing device includes an inlet turbidity meter, a floc detector, an inlet thermometer, an inlet flow meter, and a dosing cabinet. The control device includes a PLC / DCS controller. The inlet turbidity meter, the floc detector, the inlet thermometer, and the inlet flow meter are respectively connected to the PLC / DCS controller. The PLC / DCS controller is connected to the dosing cabinet.

[0006] Optionally, a first partition is provided between the floc sedimentation zone and the floc buffer zone, and a second partition is provided between the floc buffer zone and the supernatant zone, with alternating vertical spacing.

[0007] Optionally, the second partition is provided with flow holes, which are staggered.

[0008] Optionally, the first and second partitions are inclined.

[0009] Optionally, the tilt angles of the first partition and the second partition are each independently 20-85°.

[0010] Optionally, the supernatant zone is provided with a supernatant inlet and a supernatant outlet; the supernatant inlet is provided with a supernatant inlet valve, and the supernatant outlet is provided with a supernatant outlet valve.

[0011] Optionally, the inlet of the floc reaction zone is equipped with a floc reaction zone inlet valve.

[0012] Optionally, an electric brush is provided on the side of the supernatant zone closest to the transmittance / turbidity detector.

[0013] Optionally, the alum flower detection device is located in the alum flower dosing reaction zone.

[0014] Optionally, the alum flower dosing reaction zone is connected to the automatic dosing device.

[0015] Through the above technical solution, the supernatant zone of this utility model is equipped with a transmittance / turbidity detector, which can detect the supernatant in real time and is used to reflect the separation effect of floc and water. By analyzing the data from the inlet turbidity meter, floc detector, inlet thermometer, and inlet flow meter, and using a PLC / DCS controller to control the dosing cabinet to achieve automatic dosing, the accuracy and reliability of dosing are improved.

[0016] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This utility model relates to a system for detecting and automatically adding alum flowers.

[0018] Explanation of reference numerals in the attached figures 1-Alum floc sedimentation zone; 2-Alum floc buffer zone; 3-Supernatant zone; 4-Transmittance / turbidity meter; 5-Alum floc reaction zone inlet; 6-Sediment discharge pipe; 7-Inlet turbidity meter; 8-Alum floc detector; 9-Inlet thermometer; 10-Inlet flow meter; 11-Dosing cabinet; 12-PLC / DCS controller; 13-First partition; 14-Second partition; 15-Flow hole; 16-Supernatant inlet valve; 17-Supernatant outlet valve; 18-Alum floc reaction zone inlet valve; 19-Electric brush; 20-Camera device; 21-Workstation. Detailed Implementation

[0019] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0020] In this utility model, unless otherwise stated, the directional terms such as "upper", "lower", "inner", and "outer" used indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings.

[0021] In the water treatment process, flocculants and coagulants need to be added to remove impurities from the water. However, the results of periodically taking water samples from the reaction zone for beaker tests and observing the clarity of the sedimentation tank and clear water tank are relatively slow. Therefore, the effect of floc formation in the chemical reaction zone should be observed in advance. In order to achieve real-time monitoring of the separation effect of floc and water in the chemical reaction zone, automatic chemical dosing, and sludge return control, this utility model proposes a floc detection and automatic chemical dosing control system for water treatment.

[0022] This utility model provides a control system for detecting and automatically adding alum flowers. See [link to relevant documentation]. Figure 1 The system includes a floc detection device, an automatic dosing device, and a control device. The floc detection device includes a housing, inside which are a floc sedimentation zone 1, a floc buffer zone 2, and a supernatant zone 3. The supernatant zone 3 is equipped with a transmittance / turbidity detector 4. The floc buffer zone 2 is equipped with a floc reaction zone inlet 5. The floc sedimentation zone 1 is equipped with a sedimentation sludge discharge pipe 6. The automatic dosing device includes an inlet turbidity meter 7, a floc detector 8, an inlet thermometer 9, an inlet flow meter 10, and a dosing cabinet 11. The control device includes a PLC / DCS controller 12. The inlet turbidity meter 7, the floc detector 8, the inlet thermometer 9, and the inlet flow meter 10 are respectively connected to the PLC / DCS controller 12. The PLC / DCS controller 12 is connected to the dosing cabinet 11.

[0023] This invention features a transmittance / turbidity detector in the supernatant zone, enabling real-time monitoring of the supernatant and reflecting the separation effect of floc and water. By analyzing data from the inlet turbidity meter, floc detector, inlet thermometer, and inlet flow meter, and employing a PLC / DCS controller to control the dosing cabinet, automatic dosing is achieved, improving the accuracy and reliability of dosing.

[0024] In one embodiment, the transmittance / turbidity detector can reflect whether the supernatant is clear and transparent. During automatic dosing, if the dosage of the agent is well controlled, the transmittance is high, indicating good alum floc formation and a clear and transparent supernatant without visible fine flocs or turbidity. If the transmittance is low, the alum floc settling effect is poor, and the dosage needs to be adjusted to achieve rapid quantitative evaluation of the alum floc effect and support the closed-loop control of the dosing system.

[0025] In one embodiment, the influent flow rate, influent temperature, influent turbidity, dosage, and sludge return flow rate are directly related to the floc formation effect. By analyzing the data from the influent flow rate, influent temperature, influent turbidity, and floc detector, the data signals are transmitted to the PLC / DCS controller. The PLC / DCS controller receives the signals and uses algorithm logic to determine the dosage signal. The dosing cabinet receives the dosage signal and automatically adds the reagents.

[0026] In one implementation, when the influent flow rate, influent temperature, influent turbidity, and parameters of the floc detector change, the sludge return flow rate in the sedimentation zone is controlled by an algorithm through a PLC / DCS controller. The returned sludge functions as a floc carrier; controlling the sludge return flow rate can control the amount of floc carrier, ensuring the flocs reach their optimal morphology, which facilitates the separation of water and impurities.

[0027] In one embodiment, the floc detector can monitor and quantify key parameters such as the size, density, and shape of the flocs formed during the water treatment flocculation process in real time. By monitoring the floc status in real time, the dosage of the reagent can be precisely controlled, avoiding waste or insufficiency of the reagent while ensuring water quality.

[0028] In one embodiment, a first partition 13 is staggered between the floc sedimentation zone 1 and the floc buffer zone 2, and a second partition 14 is staggered between the floc buffer zone 2 and the supernatant zone 3. The first partition 13 is used for the sedimentation of sludge generated by floc, and the sedimented sludge is discharged through a bottom sludge discharge pipe. The second partition 14 is provided with flow holes 15, which are staggered. The flow holes of the second partition are used to increase the water flow effect, and the staggered arrangement of the flow holes in different partitions reduces the upward flow velocity of water.

[0029] In one embodiment, the first partition 13 and the second partition 14 are inclined, and the inclination angle of the first partition 13 and the second partition 14 is independently 20-85°. The inclination angle is used to generate resistance at the top of the buffer zone, so as to achieve the effect of allowing the supernatant to flow into the alum floc reaction zone and slowing down the water flow speed, thereby achieving the effect of alum floc sedimentation in the supernatant zone.

[0030] In one embodiment, the supernatant zone 3 is provided with a supernatant inlet and a supernatant outlet; the supernatant inlet is equipped with a supernatant inlet valve 16, and the supernatant outlet is equipped with a supernatant outlet valve 17. The supernatant inlet and outlet valves are used to periodically neutralize and adjust the water in the floc detection device and the floc reaction zone, ensuring that no accumulated impurities at the top of the supernatant affect the detection data.

[0031] In one embodiment, the inlet 5 of the floc reaction zone is provided with a floc reaction zone inlet valve 18.

[0032] In one embodiment, an electric brush 19 is provided on the side of the supernatant zone 3 near the transmittance / turbidity detector 4. The electric brush can be activated periodically to clean the sight glass surface of the transmittance / turbidity detector.

[0033] In one embodiment, the floc detection device is located in the floc dosing reaction zone. The floc dosing reaction zone inlet valve 18 of the floc dosing reaction zone inlet 5 of the floc buffer zone 2 is normally open, allowing the mixed liquid in the floc dosing reaction zone to enter the floc detection device by gravity flow. This invention places the floc detection device at the forefront of the water treatment process, specifically in the floc dosing reaction zone. The turbidity / transmittance of the supernatant in the pre-positioned floc detection device is used as a direct detection indicator, replacing traditional post-sedimentation detection. This pre-positioning allows for the prediction of floc separation effects in the subsequent sedimentation zone, enabling advance prediction of sedimentation efficiency and dynamic adjustment of dosing parameters, thus shortening the control response time. Furthermore, it provides the most timely reflection of the flocculation effect, offering the fastest feedback for subsequent reagent dosing adjustments, achieving "pre-emptive control" rather than "post-event remediation."

[0034] In one embodiment, the alum flower dosing reaction zone is connected to the automatic dosing device.

[0035] In one embodiment, the floc detection device is further equipped with a camera 20. The camera 20 can observe the supernatant in the floc reaction zone, and the observed image can be fed back to the workstation 21. The morphology of the flocs is observed through the camera, such as a webcam. A good floc formation appears dense, uniform, and generally in irregular clumps or cotton-like shapes, while a poor floc formation appears fine and powdery. The PLC / DCS controller identifies the image morphology information of a poor floc formation and generates a signal to adjust the dosage. Upon receiving the dosage adjustment signal, the dosing cabinet automatically adds the pesticide.

[0036] The working principle of this invention is as follows: Raw water first enters the floc dosing reaction zone, where coagulants (such as polyaluminum chloride, PAC) and coagulant aids (such as polyacrylamide, PAM) are added. Rapid mixing and flocculation occur through mechanical or hydraulic means, destabilizing and aggregating fine colloidal impurities and suspended solids in the water, forming easily settling flocs. The floc detection device's inlet valve is normally open, allowing water to enter. After passing through the buffer zone, flocs with good separation performance settle to the floc sedimentation zone by gravity, and the settled sludge is discharged through the bottom sludge discharge pipe. Flocs with poor separation performance flow into the supernatant zone through the flow holes and gaps. A transmittance / turbidity meter in the supernatant zone monitors the supernatant in real time, reflecting the separation effect between flocs and water. Data analysis is performed on the inlet turbidity meter, floc detector, inlet thermometer, and inlet flow meter. Based on the data feedback, the dosing tank is automatically controlled by a PLC / DCS controller to achieve automatic dosing. The water in the supernatant zone then enters the filtration clear water zone (usually achieved in the form of V-type filter, siphon filter, etc.). Through the interception effect of filter media such as quartz sand and activated carbon, the residual tiny suspended solids in the water are further removed, and finally clean clear water (or "filtered water") is produced. After disinfection in the clear water tank, it can be supplied externally or reused.

[0037] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0038] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0039] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A control system for detecting and automatically adding alum flowers, characterized in that, The system includes a floc detection device, an automatic dosing device, and a control device; The alum floc detection device includes a housing, and the housing is provided with an alum floc sedimentation zone (1), an alum floc buffer zone (2), and a supernatant zone (3). The supernatant zone (3) is equipped with a transmittance / turbidity detector (4), the floc buffer zone (2) is equipped with a floc reaction zone inlet (5), and the floc sedimentation zone (1) is equipped with a sedimentation sludge discharge pipe (6). The automatic dosing device includes an inlet turbidity meter (7), alum floc detector (8), an inlet thermometer (9), an inlet flow meter (10), and a dosing cabinet (11); the control device includes a PLC / DCS controller (12), the inlet turbidity meter (7), the alum floc detector (8), the inlet thermometer (9), and the inlet flow meter (10) are respectively connected to the PLC / DCS controller (12); the PLC / DCS controller (12) is connected to the dosing cabinet (11).

2. The system according to claim 1, characterized in that, A first partition (13) is provided between the alum floc sedimentation zone (1) and the alum floc buffer zone (2) in an alternating manner, and a second partition (14) is provided between the alum floc buffer zone (2) and the supernatant zone (3) in an alternating manner.

3. The system according to claim 2, characterized in that, The second partition (14) is provided with a flow hole (15), and the flow holes (15) are arranged in a staggered manner.

4. The system according to claim 2, characterized in that, The first partition (13) and the second partition (14) are inclined.

5. The system according to claim 4, characterized in that, The tilt angles of the first partition (13) and the second partition (14) are each independently 20-85°.

6. The system according to claim 1, characterized in that, The supernatant zone (3) is provided with a supernatant inlet and a supernatant outlet; the supernatant inlet is provided with a supernatant inlet valve (16), and the supernatant outlet is provided with a supernatant outlet valve (17).

7. The system according to claim 1, characterized in that, The inlet (5) of the floc reaction zone is equipped with a floc reaction zone inlet valve (18).

8. The system according to claim 1, characterized in that, An electric brush (19) is provided on the side of the supernatant zone (3) near the transmittance / turbidity detector (4).

9. The system according to claim 1, characterized in that, The alum flower detection device is located in the alum flower dosing reaction zone.

10. The system according to claim 9, characterized in that, The alum flower dosing reaction zone is connected to the automatic dosing device.

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