Modular dosing device

Abstract

The utility model relates to sewage treatment technical field especially, more particularly to a kind of modular dosing device.It includes dispensing and storage unit, constant pressure liquid supply system, reflux and safety protection unit, flow monitoring and statistics unit, dosing point control unit and intelligent control system.The beneficial effects of the utility model are: the technical scheme of the utility model is replaced by a large flow constant pressure water pump instead of multiple independent dosing pumps, and combined with the diaphragm regulating valve of accurate control and intelligent control system, the efficient, stable dosing operation to multiple wastewater treatment points is realized;by using a set of constant pressure liquid supply system instead of multiple independent dosing pumps, the pipeline layout is significantly simplified, and the equipment investment cost and maintenance difficulty are reduced.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a modular dosing device. Background Technology

[0002] In the field of industrial wastewater treatment, wastewater separation has become a current trend. Compared with mixed treatment, separation treatment can significantly reduce the difficulty and operating costs of wastewater treatment.

[0003] Existing technology, authorized by publication number CN2024223641752, discloses an intelligent dosing segmented advanced oxidation device. In actual production processes, different stages and products may generate various types of wastewater, with some factories even producing more than a dozen types. Treating these wastewaters separately often requires adding multiple chemicals, and conventional systems typically design separate dosing devices or pumps for each treatment system. This design results in a large number of dosing pumps of varying specifications and a complex piping system, increasing equipment investment costs and making system operation and maintenance difficult, especially during equipment failures or repairs, significantly impacting the overall system stability. Furthermore, traditional dosing systems struggle to achieve precise chemical control and lack flexible expansion capabilities, failing to meet the demands of modern wastewater treatment plants for efficient, stable, and intelligent operation.

[0004] Therefore, a modular dosing device needs to be designed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a modular dosing device to overcome the aforementioned shortcomings of the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A modular dosing device, comprising, The drug preparation and storage unit is used to complete the preparation and storage of drugs; A constant pressure liquid supply system is used to deliver the drug to multiple dosing points at a constant pressure; The reflux and safety protection unit is used for the recovery of unused portions of the reagent and for the safe control of system pressure. The reflux and safety protection unit forms a loop through the outlet pipe of the constant pressure water pump. The flow monitoring and statistics unit is used to detect the instantaneous and cumulative flow of the agent in real time; The dosing point control unit is used to precisely adjust the dosage of medicine at each dosing point; Intelligent control system is used to centrally manage the working status of each unit and realize automated operation.

[0007] Preferably, the drug preparation and storage unit consists of a drug dissolving tank and a drug storage tank, which are connected by a corrosion-resistant transfer pump. Both the drug dissolving tank and the drug storage tank are equipped with ultrasonic level gauges on their tops to monitor the liquid level in real time. A stirrer is installed inside the drug dissolving tank.

[0008] Preferably, both the dissolving tank and the storage tank are mounted on a movable base, and the dissolving tank and the storage tank are designed as skid-mounted structures.

[0009] Preferably, the constant pressure water supply system includes a constant pressure water pump, a filter, a check valve, and a pressure sensor. The outlet pipe of the constant pressure water pump is connected to the dosing point control unit. The outlet of the constant pressure water pump is connected to the filter and the check valve in sequence. The pressure sensor is installed on the outlet pipe of the constant pressure water pump and is connected to the intelligent control system signal.

[0010] Preferably, the reflux and safety protection unit includes a reflux pipe and a shut-off valve and a safety valve installed on the reflux pipe. One end of the reflux pipe is connected to the outlet pipe of the constant pressure water pump, and the other end is connected to the top of the medicine storage tank. The shut-off valve is installed on the reflux pipe, and the safety valve is installed at the end of the reflux pipe.

[0011] Preferably, the flow monitoring and statistics unit includes two electromagnetic flow meters, one installed on the inlet pipe of the constant pressure water pump and the other installed on the return pipe. The electromagnetic flow meters are also connected to the intelligent control system.

[0012] Preferably, the dosing point control unit includes a maintenance valve and an electric diaphragm valve. Each dosing point is equipped with a set of maintenance valves and electric diaphragm valves. The maintenance valve is installed at the front end of the electric diaphragm valve. The electric diaphragm valve is fixed to the dosing pipeline by a flange and is connected to the intelligent control system signal.

[0013] The beneficial effects of this utility model are: This technical solution replaces multiple independent dosing pumps with a large-flow constant pressure water pump, and combines a precisely controlled diaphragm regulating valve and an intelligent control system to achieve efficient and stable dosing operation at various wastewater treatment points. The skid-mounted design makes the device easy to transport and assemble, adapting to the needs of different wastewater treatment scenarios and improving the system's flexibility; By replacing multiple independent dosing pumps with a single constant pressure liquid supply system, the pipeline layout is significantly simplified, and the equipment investment cost and maintenance difficulty are reduced. The design of the reflux and safety protection unit effectively avoids reagent waste while enhancing system safety. It can quickly release excessive pressure in extreme situations, protecting equipment and pipelines from damage. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the structure of a modular dosing device according to the present invention; In the diagram: 1. Chemical inlet; 2. Return pipe; 3. Constant pressure water pump; 31. Check valve; 32. Pressure sensor; 4. Filter; 51. Inspection valve; 5. Electric diaphragm valve; 6. Electromagnetic flow meter; 7. Shut-off valve; 8. Safety valve; 9. Ultrasonic level gauge; 10. Agitator; 11. Transfer pump; 12. Dissolving tank; 13. Storage tank. Detailed Implementation

[0015] Reference Figure 1 A modular dosing device includes a dosing and storage unit, a constant pressure water supply system, a reflux and safety protection unit, a flow monitoring and statistics unit, a dosing point control unit, and an intelligent control system. The dosing and storage unit consists of a dissolving tank 12 and a storage tank 13. The dissolving tank 12 is equipped with a stirrer 10. Both the dissolving tank 12 and the storage tank 13 are equipped with ultrasonic level gauges 9 on their tops. The dissolving tank 12 is connected to the storage tank 13 via a transfer pump 11. The constant pressure water supply system includes a constant pressure water pump 3, a filter 4, a check valve, a pressure transmitter, and a pressure gauge. The outlet pipe of the constant pressure water pump 3 is connected to the dosing point control unit. The reflux and safety protection unit includes a reflux pipe 2 and a shut-off valve 7 and a safety valve 8 installed on the reflux pipe. The flow monitoring and statistics unit includes electromagnetic flow meters 6 installed at the inlet and reflux outlet, respectively. The dosing point control unit includes a maintenance valve 51 and an electric diaphragm valve 5.

[0016] The dissolving tank 12 and the storage tank 13 are core components of the entire device, used for the preparation and storage of the reagents. The dissolving tank 12 has a water inlet and a reagent inlet 1 at its top. The required reagents and water are added to the dissolving tank 12 manually or automatically in a specific ratio. The dissolving tank 12 is equipped with a stirrer 10, driven by a motor, which ensures thorough mixing of the reagents and water, guaranteeing uniform distribution of the reagents. An ultrasonic level gauge 9 is also installed at the top of the dissolving tank 12 to monitor the liquid level in real time. When the liquid level reaches a preset height, the control system automatically stops the water intake and reagent addition operations to prevent overflow. The prepared reagents are then transported to the storage tank 13 via a transfer pump 11. The transfer pump 11 is made of corrosion-resistant materials and can adapt to the transport requirements of different types of reagents. An ultrasonic level gauge 9 is also installed on the top of the medicine storage tank 13 to monitor the liquid level in the medicine storage tank 13 and control the start and stop of the transfer pump 11 according to the liquid level change, so as to ensure that the dosage of medicine in the medicine storage tank 13 is always kept within a reasonable range.

[0017] Both the dissolving tank 12 and the storage tank 13 are mounted on a movable base. The overall device is designed as a skid-mounted structure, which facilitates transportation and assembly and can meet the needs of different wastewater treatment scenarios.

[0018] The constant pressure water supply system includes a constant pressure water pump 3, a filter 4, a check valve, a pressure transmitter, and a pressure gauge. The constant pressure water pump 3 is installed at the outlet of the chemical storage tank 13. The pump body is made of stainless steel or fluoroplastic material, depending on the corrosiveness of the chemical, to ensure the durability and stability of the equipment. The constant pressure water pump 3 adopts a one-in-one-outstand design. The standby pump is connected to the main pump via an automatic switching device. When the main pump fails, the standby pump can start immediately, ensuring continuous operation of the system. The constant pressure water pump 3 is a variable frequency pump, and its operating frequency is adjusted by a frequency converter in the control cabinet. The frequency converter dynamically adjusts the pump's operating frequency based on the pipeline pressure data fed back by the pressure transmitter, thereby maintaining a constant pressure in the pipeline. At the outlet of the constant pressure water pump 3, a filter 4, a check valve 31, and a pressure sensor 32 are installed sequentially. The filter 4 is used to filter impurities in the chemical, preventing impurities from entering the pipeline system and causing blockages or damage to the equipment. The check valve 31 is installed at the outlet of the constant pressure water pump 3, effectively preventing liquid backflow and protecting the pump's normal operation. Pressure sensor 32 is used to accurately measure the pressure value in the pipeline and feed it back to the control system in real time to ensure the stability of drug supply at each dosing point.

[0019] The reflux and safety protection unit forms a loop through the outlet pipe of the constant pressure water pump 3, ending back in the storage tank 13. The reflux pipe 2 is equipped with a shut-off valve 7 and a safety valve 8. The shut-off valve 7 allows manual adjustment of the pressure within the pipe, while the safety valve 8 opens when the pressure in the pipe is too high, preventing system overpressure. The design of the reflux pipe allows unused chemicals to return to the storage tank 13, avoiding waste, while ensuring a constant flow and pressure within the pipe, improving system stability and reliability. The safety valve 8 further enhances system safety, enabling rapid release of excessive pressure in extreme situations, protecting equipment and pipelines from damage.

[0020] The flow monitoring and statistics unit is equipped with electromagnetic flow meters 6 at both the inlet and outlet to display instantaneous and cumulative flow rates. The inlet electromagnetic flow meter 6 is installed on the inlet pipe of the constant pressure water pump 3, while the outlet electromagnetic flow meter 6 is installed on the return pipe. Data from the two electromagnetic flow meters 6 are compared and analyzed by the control system to accurately determine the daily dosage of the chemical. The electromagnetic flow meters 6 possess high-precision measurement capabilities, accurately recording instantaneous and cumulative flow rates, providing a reliable basis for chemical usage statistics. By monitoring instantaneous and cumulative flow rates, operators can monitor chemical consumption in real time, optimize chemical dosing strategies, and reduce operating costs.

[0021] The dosing point control unit includes a maintenance valve 51 and an electrically operated diaphragm valve 5. Each dosing point is equipped with both a maintenance valve 51 and an electrically operated diaphragm valve 5. The maintenance valve 51 is installed upstream of the electrically operated diaphragm valve 5 and is used to manually close the valve in case of a malfunction, facilitating maintenance without affecting the operation of the entire system. The electrically operated diaphragm valve 5 controls the dosing amount by adjusting its opening ratio, achieving precise control of each dosing point. The opening degree of the electrically operated diaphragm valve 5 is adjusted by the control system according to actual needs, ensuring the accuracy and stability of the dosing amount. Through the cooperation of the maintenance valve 51 and the electrically operated diaphragm valve 5, the system can quickly isolate the faulty point when a single dosing point malfunctions, ensuring the normal operation of other dosing points.

[0022] The intelligent control system employs PLC and touchscreen operation. The touchscreen displays the real-time status of various instruments and equipment, as well as various alarm information. The control system centrally manages equipment such as the constant pressure water pump 3, electromagnetic flowmeter 6, and electric diaphragm valve 5 through PLC programs, achieving automated operation. The touchscreen interface can display key parameters such as pipeline pressure, flow rate, and liquid level in real time, and supports historical data query and export functions. The system reserves control access points for other equipment, facilitating precise control of the electric diaphragm valve 5 at each dosing point. Simultaneously, the system reserves control loops for the electric diaphragm pump, allowing for the future addition of dosing points. Network ports enable multiple dosing units to operate in parallel and connect to the wastewater treatment plant's main system or the plant's central control system, achieving remote monitoring and management.

[0023] First, at the start of the reagent preparation stage, the metering pump draws a measured amount of reagent from the reagent container and delivers it to the dissolving tank 12 through the reagent inlet, or it is added manually. Simultaneously, external water enters the dissolving tank 12 through the inlet connected to a solenoid valve. The mixer 10 then starts, with the motor driving the reducer and coupling to rotate the agitator. The agitator employs a multi-layer blade design, allowing the blade angle to be adjusted according to the reagent characteristics, ensuring thorough mixing of the reagent and water to form a homogeneous solution. The ultrasonic level gauge 9 monitors the liquid level in the dissolving tank 12 in real time and transmits the signal to the PLC. When the liquid level reaches the set value, the PLC controller issues a command to stop the metering pump and solenoid valve, and simultaneously starts the transfer pump 11. The transfer pump 11 delivers the mixed reagent to the storage tank 13, completing the reagent preparation process.

[0024] The drug delivery phase begins. The drug in storage tank 13 is delivered to multiple dosing points via constant pressure water pump 3. The outlet of constant pressure water pump 3 is connected in sequence to filter 1 and check valve 31. Filter 1 has a removable filter element to filter impurities in the drug, ensuring the cleanliness of the delivery pipeline. Check valve 31 prevents liquid backflow, ensuring stable system operation. Pressure sensor 32 is installed on the outlet pipeline of constant pressure water pump 3 to monitor the pressure value in the pipeline in real time and feeds the signal back to PLC. Based on the feedback signal from pressure sensor 32, PLC dynamically adjusts the operating frequency of constant pressure water pump 3 via frequency converter, thereby maintaining constant pressure in the pipeline. If constant pressure water pump 3 fails, the standby pump will quickly start via automatic switching device to ensure continuous system operation.

[0025] In the event that the medicine has not been completely used, the reflux and safety protection unit comes into play. One end of the reflux pipe 2 is the outlet pipe of the constant pressure water pump 3, and the other end is fixed to the top of the medicine storage tank 13 via a flange. The shut-off valve is used to regulate the reflux flow rate, while the safety valve automatically opens when the pressure in the pipe exceeds the set value to release excess pressure. If the pressure is too high, the excess pressure is released through the pressure relief port.

[0026] The flow monitoring and statistics unit operates continuously throughout the process. Two electromagnetic flow meters 6 are installed on the inlet and return pipes of the constant pressure water pump 3, respectively, to monitor instantaneous and cumulative flow rates in real time and transmit the data to the PLC. The PLC calculates the actual daily dosage of medicine by comparing and analyzing the data from the two electromagnetic flow meters 6 and generates a flow statistics report. This function provides a reliable basis for the precise control of medicine usage.

[0027] During the dosing point control phase, each dosing point is equipped with a set of maintenance valves and an electric diaphragm valve 5. The electric diaphragm valve 5 is fixed to the dosing pipeline via a flange, and its opening degree is adjusted by the PLC according to actual needs.

[0028] An intelligent control system is implemented throughout the entire operation. The PLC connects to the ultrasonic level gauge, pressure sensor, electromagnetic flow meter, and electric diaphragm valve via signal lines, centrally managing the operating status of each device. A touchscreen interface displays key parameters and alarm information, and supports remote monitoring and management. The system has reserved expansion interfaces, allowing it to network with other devices via industrial Ethernet, meeting the needs of adding dosing points or connecting other equipment in the future.

[0029] The advantages of this utility model are that this technical solution replaces multiple independent dosing pumps with a large-flow constant pressure water pump, and combines a precisely controlled diaphragm regulating valve and an intelligent control system to achieve efficient and stable dosing operation at various wastewater treatment points. The skid-mounted design makes the device easy to transport and assemble, adapting to the needs of different wastewater treatment scenarios and improving the system's flexibility; By replacing multiple independent dosing pumps with a single constant pressure liquid supply system, the pipeline layout is significantly simplified, and the equipment investment cost and maintenance difficulty are reduced. The design of the reflux and safety protection unit effectively avoids reagent waste while enhancing system safety. It can quickly release excessive pressure in extreme situations, protecting equipment and pipelines from damage.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A modular dosing device, characterized in that: It includes, The drug preparation and storage unit is used to complete the preparation and storage of drugs; A constant pressure liquid supply system is used to deliver the drug to multiple dosing points at a constant pressure; The reflux and safety protection unit is used for the recovery of unused portions of the reagent and for the safe control of system pressure. The reflux and safety protection unit forms a loop through the outlet pipe of the constant pressure water pump. The flow monitoring and statistics unit is used to detect the instantaneous and cumulative flow of the agent in real time; The dosing point control unit is used to precisely adjust the dosage of medicine at each dosing point; Intelligent control system is used to centrally manage the working status of each unit and realize automated operation.

2. The modular dosing device according to claim 1, characterized in that: The drug preparation and storage unit consists of a drug dissolving tank and a drug storage tank, which are connected by a corrosion-resistant transfer pump. Both the drug dissolving tank and the drug storage tank are equipped with ultrasonic level gauges on their tops to monitor the liquid level in real time. A stirrer is installed inside the drug dissolving tank.

3. The modular dosing device according to claim 1, characterized in that: Both the dissolving tank and the storage tank are mounted on a movable base, and the dissolving tank and the storage tank are designed as skid-mounted structures.

4. A modular dosing device according to claim 1, characterized in that: The constant pressure water supply system includes a constant pressure water pump, a filter, a check valve, and a pressure sensor. The outlet pipe of the constant pressure water pump is connected to the dosing point control unit. The outlet of the constant pressure water pump is connected to the filter and the check valve in sequence. The pressure sensor is installed on the outlet pipe of the constant pressure water pump and is connected to the intelligent control system.

5. A modular dosing device according to claim 1, characterized in that: The reflux and safety protection unit includes a reflux pipe and a shut-off valve and a safety valve installed on the reflux pipe. One end of the reflux pipe is connected to the outlet pipe of the constant pressure water pump, and the other end is connected to the top of the medicine storage tank. The shut-off valve is installed on the reflux pipe, and the safety valve is installed at the end of the reflux pipe.

6. A modular dosing device according to claim 1, characterized in that: The flow monitoring and statistics unit includes two electromagnetic flow meters, one installed on the inlet pipe of the constant pressure water pump and the other installed on the return pipe. The electromagnetic flow meters are also connected to the intelligent control system.

7. A modular dosing device according to claim 1, characterized in that: The dosing point control unit includes a maintenance valve and an electric diaphragm valve. Each dosing point is equipped with a set of maintenance valves and electric diaphragm valves. The maintenance valve is installed at the front end of the electric diaphragm valve. The electric diaphragm valve is fixed to the dosing pipeline by a flange and is connected to the intelligent control system signal.

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