Automatic alum adding control system

Abstract

The utility model relates to the technical field of water plant control equipment, in particular to an automatic alum adding control system. Comprising raw water, a folded plate flocculation sedimentation tank communicated with the raw water, a sand filter tank communicated with the folded plate flocculation sedimentation tank, and a clean water tank communicated with the sand filter tank, the alum adding metering pump, the turbidity meter and the flow meter are arranged between raw water and the folded plate flocculation sedimentation tank, the control unit is arranged between the folded plate flocculation sedimentation tank and the sand filter tank, and the flow meter, the constant-pressure water pump and the multi-parameter water quality detection device are arranged at an outlet of the clean water tank. According to the system, turbidity monitoring instruments are arranged between raw water and a folded plate flocculation sedimentation tank and at an outlet of a clean water tank to monitor the water quality in real time, and a flow meter is arranged between the raw water and the folded plate flocculation sedimentation tank to control the water inlet flow within a stable data range; and the dosage of the alum adding metering pump is dynamically adjusted by combining the turbidity of the inlet water and the turbidity of the outlet water, so that the optimal standard of the dosage is achieved.

Description

Technical Field

[0001] This utility model relates to the field of water plant control equipment technology, and in particular to an automatic alum dosing control system. Background Technology

[0002] In the water purification process of water plants, the addition of flocculants plays a crucial role. By adding flocculants, large particles and suspended small particles in the water are formed into dense flocs, thereby accelerating the settling speed and improving the sedimentation effect of the water.

[0003] Currently, water treatment plants typically use manual addition of flocculants. However, water quality can change due to factors such as raw water flow and weather. This necessitates manual intervention, requiring frequent adjustments to the flocculant dosage and observation of the flocculation effect. This not only requires a significant amount of time and manpower for maintenance but also makes it difficult to guarantee water quality safety.

[0004] Therefore, a more stable, reliable flocculation dosing method that is less affected by external factors and simpler to operate manually is needed to ensure water quality safety. Utility Model Content

[0005] To address the problems existing in the background technology, this utility model provides an automatic alum dosing control system. This control system can automatically add alum solution to water plants, and the dosing method is simple. Even when the raw water quality changes, it will automatically and dynamically adjust the amount of alum solution added, facilitating manual maintenance and thus reducing operating costs.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An automatic alum dosing control system includes raw water, a baffle plate flocculation sedimentation tank connected to the raw water, a sand filter connected to the baffle plate flocculation sedimentation tank, and a clear water tank connected to the sand filter; it also includes a turbidity meter, a flow meter, and an alum dosing metering pump installed between the raw water and the baffle plate flocculation sedimentation tank, a control unit between the baffle plate flocculation sedimentation tank and the sand filter, and a flow meter, a constant pressure water pump, and a multi-parameter water quality detection device installed at the outlet of the clear water tank.

[0008] The multi-parameter water quality testing device includes a turbidity meter, a thermometer, a pH meter, a residual chlorine meter, and an online COD monitor.

[0009] The control unit includes a programmable controller and its input unit, output unit, communication module, touch screen, and field valve.

[0010] The input unit of the programmable controller is used to read the status signals of the field valves, the data of the flow meter, and the status of the dosing pump.

[0011] The feature is that the output unit of the programmable controller is used to control the status of the field valves and the status of the dosing pump.

[0012] The feature is that the communication module of the programmable controller is used to read data from the multi-parameter monitoring device.

[0013] The feature is that the programmable controller and the touch screen are connected via an Ethernet interface.

[0014] In summary, this utility model has the following beneficial effects:

[0015] 1. This utility model uses instruments installed at various points to monitor water quality data in real time, calculates the dosage based on raw water turbidity and flow rate data, and then finely adjusts the dosage based on the turbidity data of the treated water to achieve the optimal dosage standard.

[0016] 2. The automatic alum addition control system provided by this utility model adopts an editable programmable controller and touch screen control, which greatly simplifies the wiring of the control cabinet, making its structure simple, and making assembly and quality inspection convenient and quick; it has a low failure rate and is easy to maintain; and it can realize the automatic addition of alum solution, solving the problem that alum solution needs to be added manually in the current operation of water plants.

[0017] 3. The raw water flow rate is kept constant to avoid inaccurate alum solution addition due to fluctuations in the raw water flow rate, which could lead to problems such as failure to flocculate and settle or alum flocs adhering to the water and not settling easily.

[0018] 4. The folded plate flocculation sedimentation tank can fully mix alum solution with raw water, accelerate flocculation and sedimentation, and thus improve the sedimentation effect of impurities in the raw water. Attached Figure Description

[0019] Figure 1 This is a structural block diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the present invention;

[0021] Explanation of reference numerals in the attached diagram: 1. Raw water; 2. Baffled flocculation sedimentation tank; 3. Sand filter; 4. Clear water tank; 41. Alum metering pump; 42. Constant pressure water pump; 51. Turbidity meter; 52. Thermometer; 53. pH meter; 54. Residual chlorine meter; 55. COD online monitoring instrument; 61. Flow meter; 71. Control unit. Detailed Implementation

[0022] This specific embodiment is merely an explanation of the present utility model and not a limitation thereof. To enable those skilled in the art to better understand the purpose and technical solutions of this application, the technical solutions in this application will be clearly described below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Therefore, based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] Example:

[0024] like Figure 2 The control unit shown mainly includes a programmable logic controller (PLC) and a touch screen. The PLC and the touch screen are connected via an Ethernet interface. The PLC has an input unit, an output unit, and a communication module. The input unit connects to the feedback signals of the field valves and instruments, the output unit is used to control the field valves and the dosing pump, and the communication module is used to communicate with the touch screen.

[0025] like Figure 2 As shown, the touch screen of the control unit is not only used to display the actual data and status of various instruments and valves, but also to control the opening and closing of valves and modify the dosing-related parameters of the dosing metering pump.

[0026] like Figure 1 As shown, the multi-parameter water quality testing device includes 51, a turbidity meter; 52, a thermometer; 53, a pH meter; 54, a residual chlorine meter; and 55, an online COD monitor.

[0027] The workflow of an automatic alum-adding control system is as follows:

[0028] Step 1: The programmable controller in the control unit reads the data from the flow meter installed between the raw water and the baffle flocculation sedimentation tank and dynamically adjusts the inlet valve to ensure stable inlet water.

[0029] Step 2: Set the alum concentration and unit dosage on the touch screen in the control unit. The touch screen transmits the relevant parameters to the programmable controller via Ethernet communication.

[0030] Step 3: The programmable controller in the control unit reads the real-time data from the turbidity meter installed between the raw water and the baffle flocculation sedimentation tank and displays it on the touch screen.

[0031] Step 4: The programmable controller in the control unit reads the data from the flow meter installed between the raw water and the baffle flocculation sedimentation tank and the influent turbidity data, and then calculates the amount of alum to be added.

[0032] Step 5: The output unit of the programmable controller in the control unit controls the start and stop of the alum metering pump and the dosing frequency of the alum metering pump.

[0033] Step 6: After the raw water and alum solution are mixed, they are thoroughly mixed and settled in the folding plate flocculation sedimentation tank and then flow into the sand filter tank. The clear water filtered by the sand flows directly into the clear water tank and is finally sent out of the plant.

[0034] Step 7: The constant pressure water pump sends the water in the clear water tank to the multi-parameter detection device. The multi-parameter detection device analyzes the water quality in the clear water tank and transmits the data to the programmable controller in the control unit. It then compares the turbidity of the raw water with the turbidity of the treated water and compares the turbidity of the treated water with the national drinking water turbidity standard before fine-tuning the amount of alum added.

[0035] Step 8: When the turbidity of the raw water changes, the programmable controller in the control unit can automatically adjust the alum dosing frequency of the alum metering pump by reading relevant parameters and making calculations.

[0036] This utility model discloses an automatic alum dosing control system with a simple structure, convenient and quick assembly and quality inspection; low failure rate and easy maintenance; and can realize automatic dosing control of alum solution in water plants.

[0037] The above are merely preferred embodiments of the present invention. The embodiments of this application are not limited to the above embodiments. For those skilled in the art, any changes, modifications, substitutions, combinations, or simplifications made without departing from the principles and spirit of this application should be considered equivalent substitutions and are included within the protection scope of this application.

Claims

1. An automatic alum control system, characterized by, It includes: Raw water (1), the folded plate flocculation sedimentation tank (2) communicated with raw water (1), sand filter tank (3) communicated with folded plate flocculation sedimentation tank (2), clean water tank (4) communicated with sand filter tank (3), install in raw water (1) and folded plate flocculation sedimentation tank (2) between alum dosing pump (41), turbidimeter (51), flowmeter (61);The control unit (71) between folded plate flocculation sedimentation tank (2) and sand filter tank (3), the flowmeter (61) is installed in clean water tank (4) outlet, constant pressure water pump (42), multi-parameter water quality detection device.

2. The automatic alum control system of claim 1, wherein The multi-parameter water quality detection device includes turbidimeter (51), thermometer (52), PH detector (53), residual chlorine instrument (54), COD online monitor (55).

3. The automatic alum control system of claim 1, wherein The control unit is an editable program controller and its input unit, output unit, communication module, touch screen, field valve.

4. The automatic alum control system of claim 3, wherein The input unit of the editable program controller is used to read the state signal of the field valve, the data of the flowmeter and the state of the dosing pump.

5. The automatic alum control system of claim 3, wherein The output unit of the editable program controller is used to control the state of the field valve and the state of the dosing pump.

6. The automatic alum control system of claim 3, wherein The communication module of the editable program controller is used to read the data of the multi-parameter monitoring device.

7. The automatic alum control system of claim 3, wherein The editable program controller and the touch screen are connected through the Ethernet interface.

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