Chemical adding device for adding polyaluminum chloride chemical

Abstract

The utility model is applicable to the field of sewage treatment, and provides a dosing device for dosing a polyaluminum chloride medicament, which comprises a stock solution storage tank, a stock solution tank liquid level meter, a mixer, a stock solution metering pump, a dilution water pipeline, a dilution tank, a dilution tank liquid level meter, a reaction tank and a total phosphorus detector, the stock solution storage pool is used for storing a PAC medicament pumped by a PAC discharge pump, the stock solution storage pool is communicated with the mixer through a stock solution metering pump, the mixer is communicated with a dilution water pipeline, the PAC medicament entering the mixer is fully mixed with raw water, and the dilution pool is communicated with the mixer and is used for temporarily storing a diluent mixed by the mixer; the reaction tank is communicated with the dilution tank through the diluent metering pump, the total phosphorus detector is installed at the liquid inlet and outlet position of the reaction tank and used for monitoring water quality parameters in real time and feeding back the water quality parameters to the control unit, and the operation of the stock solution metering pump can be adjusted according to liquid level data and real-time water quality data, so that the dosing operation is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and in particular relates to a dosing device for dosing polyaluminium chloride (PAC) agents. Background Art

[0002] In the water treatment process, polyaluminium chloride (PAC) is widely used in drinking water treatment, industrial wastewater treatment, municipal sewage treatment and other fields as a highly effective flocculant. PAC can effectively remove suspended particles, colloids, microorganisms and organic pollutants in water, significantly improving water quality. However, the effect of PAC depends largely on the accuracy and uniformity of the dosage. Therefore, how to adjust the dosage of PAC has become a key technical issue in water treatment projects.

[0003] Traditional PAC dosing devices mainly include two methods: manual dosing and simple mechanical dosing. Although manual dosing is easy to operate, it cannot guarantee the stability of the dosage, which can easily lead to waste of reagents or insufficient dosage, affecting the water treatment effect. Mechanical dosing usually uses a metering pump or a screw pump to transport the reagents, but these devices are easily affected by factors such as liquid viscosity, pressure changes, and pipe blockage during use, resulting in unstable dosage. In addition, there are large errors in the metering accuracy and dosage control of traditional devices, and it is impossible to achieve effective dosing of PAC reagents, resulting in low efficiency in the use of reagents, and it is impossible to adjust the dosage according to changes in water quality, making it difficult to meet high-precision water treatment requirements. Moreover, traditional dosing devices require frequent manual operation and maintenance, which not only increases labor intensity, but is also prone to human operating errors.

[0004] In view of these problems, it is urgent to develop a dosing device that can adjust the dosage of PAC agent to improve the efficiency of agent use and water treatment effect. Utility Model Content

[0005] In view of the above problems, the utility model provides a dosing device for dosing polyaluminium chloride (PAC) agent, aiming to solve the problems of inaccurate metering of traditional dosing devices, inability to adjust the dosage according to changes in water quality, complex manual operation and high labor intensity. The device can adjust the dosage of PAC agent and has the function of adjusting the dosage according to changes in water quality, thereby significantly improving the water treatment effect and the efficiency of agent use.

[0006] The utility model is implemented by the following technical solutions:

[0007] The utility model provides a dosing device for dosing polyaluminium chloride, comprising:

[0008] The reagent storage unit comprises a stock solution storage tank and a stock solution tank level gauge, wherein the stock solution storage tank is connected to the PAC unloading pump and is used to store the polyaluminium chloride reagent pumped by the PAC unloading pump, and the stock solution tank level gauge is installed in the stock solution storage tank and is used to monitor the liquid level of the polyaluminium chloride reagent in real time to ensure the continuity of the reagent supply;

[0009] The mixing unit includes a mixer, which is used for the PAC agent and raw water to enter the mixer for full mixing to ensure uniform distribution of the agent and the water body and improve the flocculation effect;

[0010] The metering and dosing unit comprises a stock solution metering pump and a dilution water pipeline, wherein the stock solution storage tank is connected to a mixer via the stock solution metering pump, and the mixer is connected to the dilution water pipeline;

[0011] A dilution temporary storage unit, comprising a dilution tank and a dilution tank level gauge, wherein the dilution tank is connected to the mixer and is used to temporarily store the dilution mixed by the mixer, and the dilution tank level gauge is installed in the dilution tank and is used to monitor the liquid level of the dilution in the dilution tank in real time;

[0012] A monitoring reaction unit comprises a reaction tank and a total phosphorus detector. The reaction tank is connected to the dilution tank through a dilution liquid metering pump. The total phosphorus detector is installed at the inlet and outlet of the reaction tank to monitor water quality parameters in real time and feed back to the control unit.

[0013] The control unit includes a PLC controller for controlling the entire dosing process. The PLC controller is connected to the reagent storage unit, the metering and dosing unit, the dilution liquid temporary storage unit and the monitoring reaction unit. It is used to receive the liquid level data of the original liquid tank level meter and the dilution tank level meter, and in combination with the real-time water quality data detected by the total phosphorus detector, adjust the operation of the original liquid metering pump according to the preset dosing plan to realize the dosing operation.

[0014] Furthermore, the original liquid tank level meter and the dilution tank level meter are ultrasonic level meters connected to a PLC controller.

[0015] Furthermore, the mixer is a static mixer or a dynamic mixer, and a water adding solenoid valve is installed on the dilution water pipeline connected to the mixer.

[0016] Furthermore, the water adding solenoid valve is used to adjust the amount of water in the dilution water pipeline entering the static pipeline mixer, wherein the flow rate of raw water in the dilution water pipeline entering the mixer is constant.

[0017] Furthermore, the mixer is a static mixer, which is connected to the dilution water pipeline and the stock liquid metering pump through a static pipeline mixer, and the static pipeline mixer is also connected to the dilution tank through a pipeline.

[0018] Furthermore, the total phosphorus detector consists of an inlet total phosphorus detection probe and an outlet total phosphorus detection probe respectively installed on the inlet side and outlet side of the reaction tank, and the inlet total phosphorus detection probe and the outlet total phosphorus detection probe are both connected to the PLC controller.

[0019] Furthermore, the inlet total phosphorus detection probe, outlet total phosphorus detection probe, stock liquid tank level gauge, dilution tank level gauge and stock liquid metering pump are all connected to a PLC controller, and the PLC controller is used to control the operation of the stock liquid metering pump.

[0020] Furthermore, the dilution tank is provided with a cleaning device, which includes a cleaning nozzle and a drain valve. The cleaning nozzle is connected to the cleaning water pipe and can regularly spray cleaning water to flush the inner wall of the dilution tank. The drain valve is connected to the bottom of the dilution tank and is used to discharge sewage during the cleaning process, thereby avoiding blockage and contamination caused by the deposition of reagents in the dilution tank.

[0021] Compared with the prior art, the dosing device for dosing polyaluminium chloride (PAC) of the utility model has the following beneficial effects:

[0022] 1. Effectively adjust the dosage of the agent: Use the stock liquid metering pump and the stock liquid pool level meter to ensure the adjustment of the PAC agent dosage to avoid agent waste or insufficient dosage.

[0023] 2. Adjustment of dosage ratio: The water adding solenoid valve is installed to make the flow rate of water in the dilution water pipeline entering the static pipeline mixer constant. The amount of polyaluminum chloride agent in the stock liquid storage tank entering the static pipeline mixer is controlled by the stock liquid metering pump to control the amount of polyaluminum chloride added, thereby realizing the mixing and dilution operation of the polyaluminum chloride agent.

[0024] 3. Reduced labor intensity: The dosing device reduces the workload of manual operation and maintenance, reduces labor intensity and the risk of human operating errors, and is suitable for drinking water treatment, industrial wastewater treatment, municipal sewage treatment and other fields, and has broad application prospects.

[0025] In summary, the utility model provides an efficient, stable and reliable polyaluminium chloride (PAC) dosing device, which solves the problem that the traditional device cannot adjust the dosage according to the change of water quality and the manual operation is complicated, and provides a new solution for the field of water treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The utility model is a schematic diagram of the structure of a dosing device for dosing polyaluminium chloride reagent.

[0027] Reference numerals:

[0028] 1-raw liquid pool level gauge, 2-raw liquid storage tank, 3-PAC unloading pump, 4-dilution water pipeline, 5-static pipeline mixer, 6-raw liquid metering pump, 7-dilution pool level gauge, 8-dilution tank, 9-dilution liquid metering pump; 10-reaction tank, 11-influent total phosphorus detection probe, 12-effluent total phosphorus detection probe, 13-PLC controller. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] Since traditional interception wells cannot be switched during rainy days, it is easy for sewage and initial rainwater to enter natural water bodies, causing pollution. At the same time, a large amount of rainwater entering the sewage pipe network during the rainy season will increase the load of the sewage treatment plant, increase treatment costs, and may cause urban waterlogging.

[0031] The utility model provides a dosing device for dosing polyaluminium chloride agents, which realizes effective dosing of the agents and improves the flocculation effect in the water treatment process.

[0032] The technical solution of the utility model is further described below in conjunction with specific embodiments:

[0033] See also Figure 1 As shown, the embodiment of the utility model provides a dosing device for dosing polyaluminium chloride agent, comprising an agent storage unit, a mixing unit, a metering dosing unit, a diluent temporary storage unit, a monitoring reaction unit and a control unit. The agent storage unit comprises a stock solution storage tank 2 and a stock solution tank level meter 1, wherein the stock solution storage tank 2 is connected to a PAC unloading pump 3 and is used to store the polyaluminium chloride agent pumped by the PAC unloading pump 3, and the stock solution tank level meter 1 is installed in the stock solution storage tank 2 and is used to monitor the liquid level of the polyaluminium chloride agent in real time to ensure the continuity of the agent supply.

[0034] The mixing unit includes a mixer, which is used for the PAC agent and the raw water to enter the mixer for full mixing, so as to ensure the uniform distribution of the agent and the water body and improve the flocculation effect. The mixer can be a static mixer or a dynamic mixer. In this embodiment, the mixer is a static mixer, specifically a static pipeline mixer 5.

[0035] The metering and adding unit comprises a stock liquid metering pump 6 and a dilution water pipeline 4, wherein the stock liquid storage tank 2 is connected to the mixer via the stock liquid metering pump 6, and the mixer is connected to the dilution water pipeline 4; wherein a water adding solenoid valve is installed on the dilution water pipeline 4 connected to the mixer, and the water adding solenoid valve is used to adjust the amount of raw water in the dilution water pipeline 4 entering the static pipeline mixer 5, wherein the flow rate of the raw water in the dilution water pipeline 4 entering the static pipeline mixer 5 is constant, and the dilution operation of the PAC stock liquid can be controlled by controlling the amount of PAC stock liquid in the PAC stock liquid storage tank 2 entering the static pipeline mixer 5 via the stock liquid metering pump 6.

[0036] The dilution liquid temporary storage unit includes a dilution tank 8 and a dilution tank level meter 7. The dilution tank 8 is connected to the mixer and is used to temporarily store the dilution liquid mixed by the mixer. The dilution tank level meter 7 is installed in the dilution tank 8 and is used to monitor the liquid level of the dilution liquid in the dilution tank 8 in real time. Furthermore, the mixer is a static mixer. The static mixer adopts a static pipeline mixer to be connected to the dilution water pipeline 4 and the raw liquid metering pump 6. The static pipeline mixer is also connected to the dilution tank 8 through a pipeline.

[0037] The monitoring reaction unit includes a reaction tank 10 and a total phosphorus detector. The reaction tank 10 is connected to the dilution tank 8 through a dilution liquid metering pump 9. The total phosphorus detector is installed at the inlet and outlet of the reaction tank 10, and is used to monitor water quality parameters in real time and feed back to the control unit. The control unit includes a PLC controller 13, which is used to control the entire dosing process. The PLC controller 13 is connected to the reagent storage unit, the metering dosing unit, the dilution liquid temporary storage unit and the monitoring reaction unit, and is used to receive the liquid level data of the original liquid tank level meter 1 and the dilution tank level meter 7, and in combination with the real-time water quality data detected by the total phosphorus detector, adjust the operation of the original liquid metering pump 6 according to the preset dosing plan to achieve the dosing operation.

[0038] Among them, the stock liquid pool level meter 1 and the dilution pool level meter 7 are ultrasonic level meters connected to the PLC controller 13, and the total phosphorus detector is composed of an inlet total phosphorus detection probe 11 and an outlet total phosphorus detection probe 12 respectively installed on the inlet side and the outlet side of the reaction tank 10, and the inlet total phosphorus detection probe 11 and the outlet total phosphorus detection probe 12 are both connected to the PLC controller 13. The inlet total phosphorus detection probe 11, the outlet total phosphorus detection probe 12, the stock liquid pool level meter 1, the dilution pool level meter 7 and the stock liquid metering pump 6 are all connected to the PLC controller 13, and the PLC controller 13 is used to control the operation of the stock liquid metering pump 6.

[0039] In some embodiments, the dilution tank 8 is provided with a cleaning device, which includes a cleaning nozzle and a drain valve. The cleaning nozzle is connected to the cleaning water pipe and can regularly spray cleaning water to flush the inner wall of the dilution tank 8. The drain valve is connected to the bottom of the dilution tank 8 to discharge sewage during the cleaning process, thereby avoiding blockage and contamination caused by the deposition of reagents in the dilution tank 8.

[0040] When the dosing device for adding polyaluminium chloride agent of the utility model is working, the PAC unloading pump 3 pumps the polyaluminium chloride agent into the stock liquid storage tank 2, and the stock liquid tank level meter 1 monitors the liquid level data of the stock liquid storage tank 2 in real time, and transmits the data to the PLC controller 13. According to the instruction of the PLC controller 13, the stock liquid metering pump 6 extracts an appropriate amount of PAC agent from the stock liquid storage tank 2 and transports it to the mixer. At the same time, the dilution water pipeline 4 provides raw water, which is fully mixed with the PAC agent in the mixer to form a uniform mixed liquid. The mixed liquid flows into the dilution tank 8, and the dilution tank level meter 7 monitors the liquid level in the dilution tank 8 in real time, and feeds the data back to the PLC controller 13. The diluent enters the reaction tank 10 through the diluent metering pump 9, the total phosphorus detector monitors the water quality parameters in the reaction tank 10 in real time, and monitors the total phosphorus content in real time through the inlet total phosphorus detection probe 11 and the outlet total phosphorus detection probe 12, and feeds the data back to the PLC controller 13. The PLC controller 13 adjusts the operation of the stock liquid metering pump 6 in real time based on the water quality data fed back by the total phosphorus detector, as well as the liquid level data of the stock liquid tank level meter 1 and the dilution tank level meter 7, combined with the preset addition plan, to ensure the effective addition of the PAC agent.

[0041] According to the water quality monitoring results in the reaction tank 10, the PLC controller 13 can further optimize the dosage and mixing ratio of the reagent to achieve the best flocculation effect and water treatment effect. Through the coordinated work of the above-mentioned units, the dosing device can adjust and add the polyaluminum chloride reagent, thereby improving the reagent utilization rate and treatment effect in the water treatment process.

[0042] The dosing device for adding polyaluminium chloride agent of the utility model has the characteristics of effectively adjusting the dosage of the agent, adjusting the dosage ratio, and reducing labor intensity. The stock liquid metering pump 6 and the stock liquid pool level meter 1 are adopted to ensure the adjustment of the dosage of the PAC agent and avoid waste of the agent or insufficient dosage. The flow rate of water in the dilution water pipeline 4 entering the static pipeline mixer 5 is constant through the installed water adding solenoid valve. The amount of polyaluminium chloride agent in the stock liquid storage tank 2 entering the static pipeline mixer 5 can be controlled by the stock liquid metering pump 6 to control the dosage of polyaluminium chloride, thereby realizing the mixing and dilution operation of the polyaluminium chloride agent. By adjusting the operation of the stock liquid metering pump 6, the stability and high efficiency of the water treatment effect are ensured.

[0043] The utility model provides an efficient, stable and reliable polyaluminium chloride (PAC) dosing device, which solves the problem that traditional devices cannot adjust the dosage function according to water quality changes and the manual operation is complicated, and provides a new solution for the water treatment field.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dosing device for dosing polyaluminium chloride, characterized in that: include: The reagent storage unit comprises a stock solution storage tank (2) and a stock solution tank level gauge (1); the stock solution storage tank (2) is connected to a PAC discharge pump (3) and is used to store polyaluminium chloride reagent pumped by the PAC discharge pump (3); the stock solution tank level gauge (1) is installed in the stock solution storage tank (2); A mixing unit, including a mixer, is used for the PAC agent and raw water to enter the mixer for thorough mixing; The metering unit comprises a stock solution metering pump (6) and a dilution water pipeline (4), wherein the stock solution storage tank (2) is connected to a mixer via the stock solution metering pump (6), and the mixer is connected to the dilution water pipeline (4); The dilution liquid temporary storage unit comprises a dilution tank (8) and a dilution tank level meter (7), wherein the dilution tank (8) is connected to the mixer, and the dilution tank level meter (7) is installed in the dilution tank (8); The monitoring reaction unit comprises a reaction tank (10) and a total phosphorus detector, wherein the reaction tank (10) is connected to a dilution tank (8) via a dilution liquid metering pump (9), and the total phosphorus detector is installed at the liquid inlet and outlet of the reaction tank (10) for real-time monitoring of water quality parameters.

2. The dosing device for adding polyaluminium chloride as claimed in claim 1, characterized in that: The original liquid tank level meter (1) and the dilution tank level meter (7) are both ultrasonic level meters.

3. The dosing device for adding polyaluminium chloride as claimed in claim 2, characterized in that: The mixer is a static mixer or a dynamic mixer.

4. The dosing device for adding polyaluminium chloride as claimed in claim 3, characterized in that: A water adding electromagnetic valve is installed on the dilution water pipeline (4) connected to the mixer, and the flow rate of raw water entering the mixer in the dilution water pipeline (4) equipped with the water adding electromagnetic valve is constant.

5. The dosing device for adding polyaluminium chloride as claimed in claim 4, characterized in that: The mixer is a static mixer, which is connected to the dilution water pipeline (4) and the stock liquid metering pump (6) through a static pipeline mixer, and is also connected to the dilution tank (8) through a pipeline.

6. The dosing device for adding polyaluminium chloride as claimed in claim 5, characterized in that: The total phosphorus detector is composed of an inlet total phosphorus detection probe (11) and an outlet total phosphorus detection probe (12) which are respectively installed on the inlet side and the outlet side of the reaction tank (10).

7. The dosing device for adding polyaluminium chloride as claimed in claim 6, characterized in that: The dilution tank (8) is provided with a cleaning device, which comprises a cleaning nozzle and a sewage valve, wherein the cleaning nozzle is connected to a cleaning water pipeline, and the sewage valve is connected to the bottom of the dilution tank.

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