A dosing device

Abstract

This application discloses a dosing device belonging to the field of wastewater treatment. The device includes a Venturi tube connected in series with a main wastewater pipeline. A main dosing pipe is fixedly installed at the negative pressure suction port of the Venturi tube. Multiple storage tanks connected to the main dosing pipe via branch dosing pipes are located on one side of the Venturi tube. A first solenoid valve is fixedly installed on each branch dosing pipe. The device also includes a branch water pipe fixedly installed at the positive pressure suction port of the Venturi tube for flushing the main and branch dosing pipes. The end of the branch water pipe furthest from the Venturi tube is connected to the branch dosing pipe, and a second solenoid valve is fixedly installed on the branch water pipe. After dosing, the wastewater drawn by the positive pressure of the Venturi tube can be used to specifically flush the branch and main dosing pipes via the branch water pipes, effectively preventing pipe blockage caused by chemical residue. This eliminates the need for shutdown and disassembly for cleaning, reducing the workload and labor intensity of staff, and also eliminates the need for additional flushing power equipment, saving energy and costs.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, specifically a dosing device. Background Technology

[0002] In the field of wastewater treatment, wastewater dosing devices have become one of the key pieces of equipment in order to effectively remove pollutants from wastewater and improve water quality to meet discharge standards or subsequent reuse requirements. Currently, common wastewater dosing devices in the industry mainly consist of a dosing pump, a storage tank, a mixer, and a control system. Their working principle is typically that the control system regulates the dosing pump to quantitatively deliver various wastewater treatment agents (such as flocculants, disinfectants, pH adjusters, etc.) stored in the storage tank to the dosing pipe. The dosing pipe then introduces the agents into the mixer, allowing them to fully mix and react with the wastewater to achieve the purpose of purifying the wastewater.

[0003] However, in the actual operation of existing wastewater dosing systems, when chemicals enter the mixer via the dosing pump and dosing pipe, the dosing pipe often lacks a dedicated flushing structure or mechanism. Because some chemicals used in wastewater treatment (especially some polymeric flocculants and viscous agents) tend to adhere to and dry on the inner wall of the dosing pipe after contact, these residues accumulate over time. This can lead to a decrease in the inner diameter of the dosing pipe, causing unstable chemical delivery, affecting dosing accuracy and wastewater treatment efficiency, and in severe cases, directly causing blockage of the dosing pipeline.

[0004] Therefore, this application provides a dosing device to solve the above-mentioned problems. Utility Model Content

[0005] This application provides a dosing device, which aims to solve the problems mentioned in the background art, such as the lack of a dedicated flushing structure or flushing mechanism in the existing dosing pipe, which makes it easy for the agent to remain on the inner wall of the dosing pipe, thereby causing the inner diameter of the dosing pipe to decrease, affecting the dosing accuracy and sewage treatment effect, and in severe cases, causing blockage of the dosing pipe.

[0006] To achieve the above objectives, this application provides the following technical solution: a dosing device, comprising a Venturi tube for connecting in series with a main sewage pipeline, a main dosing pipe fixedly installed at the negative pressure suction port of the Venturi tube, a plurality of storage tanks connected to the main dosing pipe via branch dosing pipes on one side of the Venturi tube, a first solenoid valve fixedly installed on the branch dosing pipe; further comprising a branch water pipe fixedly installed at the positive pressure suction port of the Venturi tube for flushing the main dosing pipe and the branch dosing pipe, the end of the branch water pipe away from the Venturi tube being connected to the branch dosing pipe, a second solenoid valve fixedly installed on the branch water pipe. During dosing, the first solenoid valve opens and the second solenoid valve closes, allowing the chemical to flow from the storage tank through the branch dosing pipe and the main dosing pipe into the venturi pipe. After dosing, the first solenoid valve closes and the second solenoid valve opens, allowing wastewater to enter the branch pipe through the positive pressure suction port of the venturi pipe, and then flow through the branch dosing pipe and the main dosing pipe, flushing the inside of the branch dosing pipe and the main dosing pipe to prevent chemical residue from causing pipe blockage.

[0007] Preferably, the interior of the Venturi tube, along the water flow direction, comprises a constriction section, a throat, and a diffuser section. The main dosing pipe is connected to the throat of the Venturi tube, and the branch pipes are connected to the constriction section of the Venturi tube. Utilizing the Venturi effect to provide power for extracting the chemical eliminates the need for additional power equipment, reducing energy consumption while ensuring stable chemical delivery.

[0008] Preferably, to facilitate the installation of the Venturi tube: both ends of the Venturi tube are fixedly fitted with flanges, and the flanges have multiple through holes spaced circumferentially. This facilitates the installation and disassembly of the Venturi tube and the main sewage pipeline, improves installation efficiency, and reduces installation difficulty.

[0009] Preferably, to facilitate monitoring of the chemical flow rate: a flow meter is fixedly installed on the branch dosing pipe, and the flow meter is located between the first solenoid valve and the main dosing pipe. This allows for real-time monitoring of the chemical flow rate within the branch dosing pipe, enabling staff to adjust the chemical delivery rate promptly, ensuring dosing accuracy, and improving wastewater treatment efficiency.

[0010] Preferably, to improve the dosing speed, a dosing pump is fixedly installed on the branch dosing pipe. This increases the delivery speed of the agent within the branch dosing pipe, accelerates the delivery efficiency of the agent to the main dosing pipe and the venturi pipe, meets the needs of large-dose or rapid dosing, and improves the overall progress of wastewater treatment.

[0011] Preferably, the system also includes a drug dispersion unit located at the negative pressure suction port of the venturi tube corresponding to the throat. The drug dispersion unit is a porous microporous ceramic head. The porous microporous ceramic head breaks the sucked-in drug into countless tiny bundles, and the turbulence of the fluid in the diffusion section allows the drug to be instantly and uniformly mixed with the wastewater, improving mixing efficiency and enhancing the wastewater treatment effect.

[0012] This application, through the cooperation of the branch water pipe and the second solenoid valve, allows for targeted flushing of the branch dosing pipe and the main dosing pipe by using the positive pressure suction of the venturi pipe after the dosing is completed, effectively preventing pipe blockage caused by chemical residue. It eliminates the need for shutdown and disassembly for cleaning, reducing the workload and labor intensity of maintenance personnel, ensuring continuous operation of the dosing device and the entire wastewater treatment process, improving wastewater treatment efficiency, reducing economic losses and environmental risks caused by downtime, and saving energy and costs by eliminating the need for additional flushing power equipment.

[0013] This application uses a porous microporous ceramic head to break the inhaled agent into countless tiny micro-beams, and utilizes the turbulence of the fluid in the diffusion section to make the agent and sewage mix instantly and uniformly, thereby improving mixing efficiency and enhancing sewage treatment effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a drug dosing device; Figure 2 A schematic diagram showing the connection between the branch water pipe, the branch chemical dosing pipe, and the Venturi tube; Figure 3 This is a schematic diagram of the internal structure of a Venturi tube; Figure 4 This is a schematic diagram of the structure of a drug dispersion unit.

[0015] In the picture: 1. Venturi tube; 11. Contraction section; 12. Throat; 13. Diffusion section; 14. Flange; 2. Main dosing pipe; 3. Branch dosing pipe; 31. First solenoid valve; 32. Flow meter; 33. Dosing pump; 4. Storage tank; 5. Branch water pipe; 51. Second solenoid valve; 6. Drug dispersion unit. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0017] Example 1 This embodiment provides a dosing device, such as... Figure 1-4As shown, the dosing device includes a Venturi tube 1 connected in series with the main sewage pipeline. A main dosing pipe 2 is fixedly installed at the negative pressure suction port of the Venturi tube 1. Multiple storage tanks 4, connected to the main dosing pipe 2 via branch dosing pipes 3, are located on one side of the Venturi tube 1. A first solenoid valve 31 is fixedly installed on each branch dosing pipe 3. The device also includes a branch water pipe 5 fixedly installed at the positive pressure suction port of the Venturi tube 1 for flushing the main dosing pipe 2 and branch dosing pipes 3. The end of the branch water pipe 5 away from the Venturi tube 1 is connected to the branch dosing pipe 3, and a second solenoid valve 51 is fixedly installed on the branch water pipe 5. Through the cooperation of the branch water pipe 5 and the second solenoid valve 51, the main dosing pipe 2 and branch dosing pipes 3 can be effectively flushed, preventing pipe blockage and ensuring continuous and stable operation of the dosing device without the need for shutdown and disassembly for cleaning. During dosing, the first solenoid valve 31 is opened and the second solenoid valve 51 is closed. The chemical enters the Venturi tube 1 from the storage tank 4 through the branch dosing pipe 3 and the main dosing pipe 2. After the dosing is completed, the first solenoid valve 31 is closed and the second solenoid valve 51 is opened. Wastewater enters the branch water pipe 5 through the positive pressure suction port of the Venturi tube 1, and then flows through the branch dosing pipe 3 and the main dosing pipe 2 to flush the inside of the branch dosing pipe 3 and the main dosing pipe 2 to prevent chemical residue from causing pipe blockage.

[0018] The Venturi tube 1, along the water flow direction, consists of a contraction section 11, a throat 12, and a diffuser section 13. The main dosing pipe 2 is connected to the throat 12 of the Venturi tube 1, and the branch pipe 5 is connected to the contraction section 11 of the Venturi tube 1. The Venturi effect is used to provide power for extracting the chemicals, eliminating the need for additional power equipment, reducing energy consumption, and ensuring stable chemical delivery. When wastewater flows through the Venturi tube 1, it gradually accelerates during the flow in the contraction section 11, and the flow velocity further increases after entering the throat 12. According to fluid mechanics principles, the increased velocity leads to a decrease in pressure at the throat 12, creating a negative pressure. This negative pressure acts on the main dosing pipe 2, thus providing power for extracting the chemicals from the storage tank 4, allowing the chemicals to smoothly enter the Venturi tube 1.

[0019] To facilitate the installation of the Venturi tube 1, flanges 14 are fixedly fitted at both ends of the Venturi tube 1. Multiple through holes are evenly spaced in a ring on the flanges 14. This facilitates the installation and disassembly of the Venturi tube 1 to the main sewage pipeline, improving installation efficiency and reducing installation difficulty. During installation, align the flanges 14 at both ends of the Venturi tube 1 with the corresponding flanges on the main sewage pipeline. Bolts are then inserted into the through holes of the flanges 14 and tightened to achieve a fixed connection between the Venturi tube 1 and the main sewage pipeline, thus completing the installation of the Venturi tube 1.

[0020] To facilitate monitoring of the chemical flow rate, a flow meter 32 is fixedly installed on the branch dosing pipe 3, located between the first solenoid valve 31 and the main dosing pipe 2. This allows for real-time monitoring of the chemical flow rate within the branch dosing pipe 3, enabling staff to adjust the chemical delivery volume promptly, ensuring dosing accuracy, and improving wastewater treatment efficiency. When the chemical is delivered from the storage tank 4 to the main dosing pipe 2 via the branch dosing pipe 3, it flows through the flow meter 32. The flow meter 32 detects and displays the chemical flow rate data within the branch dosing pipe 3 in real time. Based on this data, staff adjust the chemical delivery volume by controlling the opening of the first solenoid valve 31, ensuring the chemical flow rate meets the wastewater treatment requirements.

[0021] To improve the dosing speed, a dosing pump 33 is fixedly installed on the branch dosing pipe 3. This increases the delivery speed of the chemical within the branch dosing pipe 3, accelerating the delivery efficiency of the chemical to the main dosing pipe 2 and the venturi pipe 1, meeting the needs for large-dose or rapid dosing, and improving the overall progress of wastewater treatment. When dosing is required, the first solenoid valve 31 is opened, and the dosing pump 33 starts, generating power to quickly draw the chemical from the storage tank 4 into the branch dosing pipe 3, and pushes the chemical to flow faster towards the main dosing pipe 2, thus entering the venturi pipe 1 more quickly to mix with the wastewater, effectively improving the dosing speed.

[0022] Example 2 Unlike Example 1, this embodiment also includes a drug dispersion unit 6, located at the throat 12 corresponding to the negative pressure suction port of the Venturi tube 1. The drug dispersion unit 6 is a porous microporous ceramic head. The porous microporous ceramic head breaks the sucked-in drug into numerous tiny bundles. The turbulence of the fluid in the diffusion section 13 allows the drug to be instantly and uniformly mixed with the wastewater, improving mixing efficiency and enhancing wastewater treatment effectiveness. When a negative pressure is formed at the throat 12 of the Venturi tube 1, drawing in the drug delivered by the main dosing pipe 2, the drug first flows through the drug dispersion unit 6. The porous microporous ceramic head breaks the drug into numerous tiny bundles, which then enter the diffusion section 13 of the Venturi tube 1 with the fluid. The wastewater in the diffusion section 13 is in a turbulent state, and the turbulence causes the tiny bundles to collide and merge fully with the wastewater, achieving instantaneous and uniform mixing of the drug and wastewater.

[0023] The wiring diagram of the dosing pump 33 in this utility model is common knowledge in the field. Its working principle is a well-known technology. The appropriate model is selected according to actual use. Therefore, the control method and wiring layout of the dosing pump 33 will not be explained in detail.

[0024] The control method of this application is through a controller. The control circuit of the controller can be implemented by a person skilled in the art through simple programming. The power supply is also common knowledge in the art. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0025] All electrical components mentioned in the text are electrically connected to the main controller and power supply. The main controller can be a conventional known device such as a computer that performs control functions, and the existing publicly available power connection technologies are not described in detail in the text.

[0026] It should be noted that many of the standard parts used in this application are available on the market, while non-standard parts can be specially customized. The connection method used in this application is also a very common method in the mechanical field, and will not be described in detail here.

[0027] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A dosing device, characterized in that: Includes a Venturi tube (1) for connecting in series with the main sewage pipeline, a main dosing pipe (2) is fixedly installed at the negative pressure suction port of the Venturi tube (1), and a plurality of storage tanks (4) connected to the main dosing pipe (2) through branch dosing pipes (3) are provided on one side of the Venturi tube (1), and a first solenoid valve (31) is fixedly installed on the branch dosing pipe (3). It also includes a branch water pipe (5) fixedly installed at the positive pressure suction port of the Venturi tube (1) for flushing the main dosing pipe (2) and the branch dosing pipe (3). The end of the branch water pipe (5) away from the Venturi tube (1) is connected to the branch dosing pipe (3), and a second solenoid valve (51) is fixedly installed on the branch water pipe (5).

2. The dosing device according to claim 1, characterized in that: The Venturi tube (1) has a constriction section (11), a throat (12) and a diffuser section (13) in sequence along the water flow direction. The main dosing pipe (2) is connected to the throat (12) of the Venturi tube (1), and the branch pipe (5) is connected to the constriction section (11) of the Venturi tube (1).

3. The dosing device according to claim 1, characterized in that: Both ends of the Venturi tube (1) are fixedly fitted with flanges (14), and the flanges (14) are provided with multiple through holes at equal intervals in a ring.

4. The dosing device according to claim 1, characterized in that: A flow meter (32) is fixedly installed on the branch dosing pipe (3), and the flow meter (32) is located between the first solenoid valve (31) and the main dosing pipe (2).

5. The dosing device according to claim 1, characterized in that: A dosing pump (33) is fixedly installed on the branch dosing pipe (3).

6. The dosing device according to claim 2, characterized in that: It also includes a drug dispersion unit (6), which is located at the negative pressure suction port of the Venturi tube (1) corresponding to the throat tube (12). The drug dispersion unit (6) is a porous microporous ceramic head.

Images