A coagulant dosing device

Abstract

The utility model discloses a coagulant dosing device, including erecting on coagulation tank and gas supply main part of dosing main part, is equipped with first connecting portion on dosing main part, and first connecting portion bottom rotatable first hollow tube is equipped with, is equipped with second connecting portion on gas supply main part, and second connecting portion bottom rotatable second hollow tube, and first hollow tube and second hollow tube nest coaxial setting, second hollow tube lower end circumferential even distribution gas supply branch pipe, and gas supply branch pipe same side even distribution gas outlet pipe, and first hollow tube lower end circumferential even distribution dosing branch pipe, dosing branch pipe is located gas outlet pipe top and its even distribution and gas outlet pipe one to one corresponding standpipe, and standpipe vertical intercommunication gas outlet pipe. The utility model discloses through setting up high pressure gas circuit and dosing channel simultaneously, utilizes high pressure gas in raw water homodromous jet flow to form rotation power, and makes coagulant be refined again and then diffuses and mixes to raw water, forms stirring and eddy current mixing effect, has the advantage that mixing effect is good, coagulant utilization efficiency is high, and equipment investment cost is low.

Description

Technical Field

[0001] This utility model belongs to the field of water treatment technology, and specifically relates to a coagulant dosing device. Background Technology

[0002] Coagulation is a preliminary step in wastewater treatment, involving the addition of coagulants to raw wastewater to flocculate and separate suspended solids and colloidal substances. Existing coagulant dosing devices directly add the coagulant to the wastewater treatment tank. However, the limited diffusion range of the added coagulant prevents it from quickly and thoroughly mixing with the wastewater, resulting in poor flocculation effects, low coagulant utilization, and ultimately, compromised wastewater treatment efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a coagulant dosing device to solve the problems of slow mixing and low utilization rate caused by direct dosing of coagulants.

[0004] This utility model is achieved through the following technical solution:

[0005] This utility model proposes a coagulant dosing device, mounted on a coagulation tank, including a dosing pipe and a gas supply pipe mounted on the coagulation tank. The dosing pipe is connected to a coagulant storage tank, and a first connecting part is provided on the dosing pipe. A first hollow pipe is rotatably connected to the bottom of the first connecting part, and the first hollow pipe is connected to the dosing pipe. The gas supply pipe is connected to a high-pressure gas source, and a second connecting part is provided on the gas supply pipe. A second hollow pipe is rotatably connected to the bottom of the second connecting part, and the second hollow pipe is connected to the gas supply pipe. The first hollow tube is sleeved outside the second hollow tube and the two are coaxially arranged. The coagulant is filled between the first hollow tube and the second hollow tube. Gas supply branches are evenly distributed around the lower end of the second hollow tube. Gas outlet pipes are evenly distributed on the gas supply branches. The gas outlet pipes are located on the same side in the same direction of rotation. Drug administration branches are evenly distributed around the lower end of the first hollow tube. The drug administration branches are located above the gas outlet pipes. Vertical pipes are evenly distributed on the drug administration branches. The vertical pipes are arranged one-to-one with the gas outlet pipes and are vertically connected to the gas outlet pipes.

[0006] Based on the above technical solution, high-pressure gas forms a jet in the raw water through the main gas supply pipe, the first hollow pipe, the gas supply branch pipe, and the gas outlet pipe. The interaction between the gas and water generates rotational power. At the same time, the coagulant enters the gas outlet pipe through the main drug delivery pipe, the first hollow pipe, the drug delivery branch pipe, and the vertical pipe. After being refined by the high-pressure airflow, it is sprayed into the raw water at a certain speed, spreading and distributing within a large radius and mixing rapidly with the raw water. Simultaneously, the rotational power generated by the jet airflow drives the gas supply branch pipe, the drug delivery branch pipe, and the components on them to rotate synchronously, creating a stirring and vortex effect on the raw water. This further promotes the rapid mixing of the coagulant and the raw water, which is beneficial for rapid flocculation in the later stage. It has the advantages of good mixing effect, high coagulant utilization efficiency, no need for additional stirring device, and low treatment cost.

[0007] Preferably, the gas supply main pipe and the drug delivery main pipe are arranged at a certain angle to cross each other. This design helps to form a stable support structure for the whole device without the need for additional support structures.

[0008] Preferably, the gas supply branch pipe and the drug delivery branch pipe are designed in multiple layers according to the height of the coagulation tank and the sewage treatment. This design facilitates the addition and mixing of coagulants in a three-dimensional manner with the raw water, and promotes the improvement of coagulation effect and subsequent flocculation effect.

[0009] Preferably, a baffle is installed on the side of the air supply branch pipe away from the air outlet pipe. This design, through the baffle design, prevents the air jet from the air outlet pipe from acting directly on the air supply branch pipe, which not only avoids damage to the air supply branch pipe, but also helps to enhance the rotational power and vortex mixing effect.

[0010] More preferably, the air supply branch pipe is provided with a guide post that penetrates the baffle, and a buffer spring is sleeved on the guide post. The buffer spring is located between the baffle and the air supply branch pipe. This design can form an elastic buffer for the baffle, absorb the force of the jet airflow, and increase the rotational power to a certain extent by utilizing the spring force. The effect is more obvious, especially when the spacing of the air supply branch pipes is small.

[0011] Preferably, the outlet pipe forms a certain angle with the supply branch pipe to facilitate the formation of centrifugal reaction force after the high-pressure gas is injected. This not only expands the diffusion radius of the coagulant but also reduces the rotational resistance of the supply branch pipe.

[0012] Preferably, the outlet pipe is a variable diameter pipe, which gradually tapers from the connection point with the supply branch pipe to the end. This design can increase the injection pressure or relatively reduce the supply pressure requirement of the high-pressure gas source by gradually reducing the pipe diameter, which is beneficial for energy saving.

[0013] Preferably, a turbidity sensor is provided on the outside of the first hollow tube, and a flow valve is provided on the main drug delivery tube. The turbidity sensor is signal-connected to the flow valve. This design, through the cooperation of the turbidity sensor and the flow valve, can realize online adjustment of the drug delivery amount according to the raw water quality, providing the accuracy of drug delivery and avoiding overdose or underdose.

[0014] Preferably, the main gas supply pipe is equipped with a pressure regulating valve, which is signal-connected to a controller. The controller, in conjunction with the pressure regulating valve, regulates the gas pressure in the main gas supply pipe. This design allows the pressure of the jet gas flow to be controlled by the pressure regulating valve, thereby controlling the rotation speed of components such as the gas supply branch pipe and the drug delivery branch pipe. This enables the entire device to be used for both rapid mixing after coagulant addition and slow mixing during the flocculation stage, greatly saving on equipment investment costs.

[0015] Preferably, a sealing structure is provided at the rotatable connection between the first hollow tube and the first connecting part, and at the rotatable connection between the second hollow tube and the second connecting part. The sealing structure is a skeleton oil seal or a mating structure of the sealing groove and the sealing ring.

[0016] Beneficial effects

[0017] One of the above technical solutions has the following advantages or beneficial effects:

[0018] (1) By simultaneously setting up a high-pressure gas path and a liquid administration channel in the dosing device, and adding the coagulant before the high-pressure gas forms a jet in the raw water, the coagulant is refined and diffused by the high-pressure gas and mixed into the raw water. At the same time, the rotation is driven by the jet airflow to form a mixing and vortex mixing effect. It has the advantages of good mixing effect, high coagulant utilization efficiency, no need for additional mixing device, and low treatment cost.

[0019] (2) By setting up turbidity sensors, flow valves, air pressure regulating valves, etc., the dosage can be adjusted in real time according to the water quality, and the same dosing device can be adjusted by air pressure to adjust the rotation speed. It is suitable for both rapid stirring during dosing and slow stirring during flocculation, which greatly saves the investment cost of the equipment. Attached Figure Description

[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the usage state of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 3This is a cross-sectional structural diagram of the present invention;

[0024] Figure 4 This is a partial structural diagram of the present invention. Figure 1 ;

[0025] Figure 5 This is a partial structural diagram of the present invention. Figure 2 ;

[0026] Figure 6 This is a partial structural diagram of the present invention. Figure 3 ;

[0027] In the diagram: 1. Dosing pipe; 101. Flow valve; 2. Gas supply pipe; 200. High-pressure gas source; 201. Gas pressure regulating valve; 3. First connecting part; 301. Cavity; 302. Sealing ring; 4. Second connecting part; 5. First hollow tube; 501. Second hollow tube; 6. Gas supply branch pipe; 7. Gas outlet pipe; 8. Dosing branch pipe; 9. Vertical pipe; 10. Baffle; 11. Guide post; 12. Buffer spring; 13. Turbidity sensor; 14. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0029] like Figure 1 As shown, this utility model provides a coagulant dosing device, which is installed on a coagulation tank. To ensure that the coagulant is evenly dispersed in the coagulation tank, the dosing device of this utility model can be set into multiple groups. The density is determined according to the diffusion radius and effective mixing radius of the coagulant. Each group of dosing devices shares a common drug delivery pipe 1 or gas supply pipe 2 according to its distribution location. The specific structure is as follows:

[0030] like Figure 1 and Figure 2As shown, the coagulant dosing device of this utility model includes a dosing pipe 1 and a gas supply pipe 2 mounted on a coagulation tank. The gas supply pipe 2 and the dosing pipe 1 are arranged at a certain angle to form a stable support structure for the entire device. The angle can be 90° or other values, depending on the specific shape of the coagulation tank. The dosing pipe 1 is connected to a coagulant storage tank (not shown in the attached figure). The coagulant flowing in the dosing pipe 1 has a certain flow pressure. The dosing pipe 1 is provided with a first connecting part 3, and a first hollow pipe 5 is rotatably provided at the bottom of the first connecting part 3. The first hollow pipe 5 is connected to the dosing pipe 1. The gas supply pipe 2 is connected to a high-pressure gas source 200. The gas supply pipe 2 is provided with a second connecting part 4, and the bottom of the second connecting part 4 is rotatably provided. A second hollow tube 6 is provided, which is connected to the main gas supply tube 2. The first hollow tube 5 is sleeved outside the second hollow tube 6 and the two are coaxially arranged. The coagulant is filled between the first hollow tube 5 and the second hollow tube 6. Gas supply branch pipes 7 are evenly distributed around the lower end of the second hollow tube 6. Gas outlet pipes 8 are evenly distributed on the gas supply branch pipes 7. The gas outlet pipes 8 are located on the same side in the same rotation direction. Drug administration branch pipes 9 are evenly distributed around the lower end of the first hollow tube 5. The drug administration branch pipes 9 are located above the gas outlet pipes 8. Vertical pipes 10 are evenly distributed on the drug administration branch pipes 9. The vertical pipes 10 are arranged one-to-one with the gas outlet pipes 8 and are vertically connected to the gas outlet pipes 8 so that the coagulant enters the gas outlet pipes 8 in a vertical airflow direction and is then pulverized and refined by the high-pressure airflow.

[0031] Among them, such as Figure 3 As shown, the first connecting part 3 has an internal cavity 301. The main drug delivery tube 1 communicates with the cavity 301 of the first connecting part 3. The upper end of the first hollow tube 5 also communicates with the cavity 301 of the first connecting part 3. A protruding ring 501 protrudes from the first hollow tube 5, and a groove (not shown in the figure) is provided at the bottom of the first connecting part 3. The protruding ring 501 is embedded in the groove to form a relative rotation structure. When the first hollow tube 5 is rotated by the drug delivery branch tube 9 fixedly connected to it, the first hollow tube 5 rotates relative to the first connecting part 3. Similarly, the second connecting part 4 and the second hollow tube 6 also adopt the same rotation structure. In addition, the rotation structure can also be realized by the fit between the shaft hole and the bearing bush, as long as a rotational connection can be achieved. Preferably, in order to achieve the sealing of the gas path and the liquid passage, a sealing structure is provided at the rotatable connection between the first hollow tube 5 and the first connecting part 3, and at the rotatable connection between the second hollow tube 6 and the second connecting part 4. The sealing structure is a skeleton oil seal or a mating structure of the sealing groove (not shown in the figure) and the sealing ring 302. This utility model adopts the latter sealing structure.

[0032] In actual use, high-pressure gas forms a jet in the raw water through the main gas supply pipe 2, the first hollow pipe 5, the gas supply branch pipe 7, and the gas outlet pipe 8. The interaction between the gas and water generates rotational power. At the same time, the coagulant enters the gas outlet pipe 8 through the main drug delivery pipe 1, the first hollow pipe 5, the drug delivery branch pipe 9, and the vertical pipe 10. After being refined by the high-pressure airflow, it is sprayed into the raw water at a certain speed, spreading and distributing within a large radius and mixing rapidly with the raw water. Meanwhile, the rotational power generated by the jet airflow drives the gas supply branch pipe 7, the drug delivery branch pipe 9, and the components on them to rotate synchronously, creating a stirring and vortex effect on the raw water, further promoting the rapid mixing of the coagulant with the raw water, thereby achieving efficient coagulant dosing.

[0033] Furthermore, the gas supply branch pipe 7 and the drug administration branch pipe 9, including the gas outlet pipe 8 and the vertical pipe 10 thereon, are set to be multi-layered according to the height of the coagulation tank and the sewage treatment. The number of layers is specifically determined according to the sewage height and the range of action of the coagulant, so as to form a three-dimensional surface of the raw water for coagulant addition and mixing effect, thereby improving the coagulation effect and the subsequent flocculation effect, and enhancing the utilization rate of coagulant.

[0034] Furthermore, such as Figure 4 As shown, a baffle 11 is installed on the side of the air supply branch pipe 7 opposite to the air outlet pipe 8. The baffle 11 is used to prevent the airflow from the air outlet pipe 8 from directly acting on the air supply branch pipe 7, so as to avoid damage to the air supply branch pipe 7 and enhance the rotational power and vortex mixing effect. Preferably, the air supply branch pipe 7 is provided with a guide post 12 that penetrates the baffle 11. A buffer spring 13 is sleeved on the guide post 12. The buffer spring 13 is located between the baffle 11 and the air supply branch pipe 7, so that the baffle 11 can absorb the force of the jet airflow and reduce the damage of the airflow to the baffle 11.

[0035] Furthermore, a turbidity sensor 14 is provided on the outside of the first hollow tube 5, and a flow valve 101 is provided on the main drug delivery tube 1. The turbidity sensor 14 is connected to the flow valve 101. The turbidity in the water to be treated is monitored in real time by the turbidity sensor 14, and the flow valve 101 is controlled in real time to precisely adjust the dosage of coagulant to avoid over- or under-dosing.

[0036] As one of the feasible implementation methods, such as Figure 5 As shown, the air outlet pipe 8 forms a certain angle with respect to the air supply branch pipe 7. Figure 5 The included angle (α) is determined based on the spacing of the dosing devices and the preset mixing radius, and is generally set to 45° to 60°, so as to facilitate the formation of centrifugal reaction force after the high-pressure gas is injected. This not only expands the diffusion radius of the coagulant, but also helps to reduce the rotational resistance of the gas supply branch pipe 7.

[0037] As one of the feasible implementation methods, such as Figure 6As shown, the outlet pipe 8 is a variable diameter pipe. The outlet pipe 8 gradually tapers from the connection with the supply branch pipe 7 to the end. This design can increase the injection pressure or relatively reduce the supply pressure requirement of the high-pressure gas source 200 by gradually reducing the pipe diameter, which is beneficial to energy saving.

[0038] Furthermore, referring to Figure 1 The main gas supply pipe 2 is equipped with a pressure regulating valve 201, which is signal-connected to a controller (not shown in the attached figure). The controller, in conjunction with the pressure regulating valve 201, regulates the gas pressure in the main gas supply pipe 2. During use, when coagulant is added, the gas supply pressure is increased to provide a jet airflow with a higher speed, which drives the gas supply branch pipe 7 and the drug administration branch pipe 9 to rotate rapidly, promoting the rapid mixing of the coagulant with the raw water for reaction. After the addition is completed, the gas supply pressure is reduced to reduce the jet airflow speed, thereby reducing the rotation speed of the gas supply branch pipe 7 and the drug administration branch pipe 9 to match the slow stirring required in the flocculation stage. This replaces the slow mixing equipment required for the original coagulation tank, achieving a significant saving in equipment investment costs.

[0039] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A coagulant dosing device, mounted on a coagulation tank, characterized in that: The system includes a drug delivery main pipe and a gas supply main pipe mounted on a coagulation tank. The drug delivery main pipe is connected to a coagulant storage tank. The drug delivery main pipe has a first connecting part, and a first hollow pipe is rotatably mounted at the bottom of the first connecting part, connecting to the drug delivery main pipe. The gas supply main pipe is connected to a high-pressure gas source. The gas supply main pipe has a second connecting part, and a second hollow pipe is rotatably mounted at the bottom of the second connecting part, connecting to the gas supply main pipe. The first hollow pipe is sleeved outside the second hollow pipe, and the two are coaxially arranged. The coagulant is filled between the first hollow pipe and the second hollow pipe. Gas supply branch pipes are evenly distributed circumferentially at the lower end of the second hollow pipe, and gas outlet pipes are evenly distributed on the gas supply branch pipes. The gas outlet pipes are located on the same side in the same direction of rotation. Drug delivery branch pipes are evenly distributed circumferentially at the lower end of the first hollow pipe, and the drug delivery branch pipes are located above the gas outlet pipes. Vertical pipes are evenly distributed on the drug delivery branch pipes, and the vertical pipes are arranged one-to-one with the gas outlet pipes and are vertically connected to the gas outlet pipes.

2. The coagulant dosing device according to claim 1, characterized in that: The gas supply pipe and the drug delivery pipe are arranged at a certain angle and cross each other.

3. The coagulant dosing device according to claim 1, characterized in that: The gas supply branch pipe and the drug delivery branch pipe are configured in multiple layers according to the height of the coagulation tank and the sewage treatment.

4. The coagulant dosing device according to claim 1, characterized in that: A baffle is installed on the side of the gas supply branch pipe opposite to the gas outlet pipe.

5. The coagulant dosing device according to claim 4, characterized in that: The gas supply branch pipe is provided with a guide post that passes through the baffle, and a buffer spring is sleeved on the guide post. The buffer spring is located between the baffle and the gas supply branch pipe.

6. The coagulant dosing device according to claim 1, characterized in that: The air outlet pipe forms a certain angle with the air supply branch pipe.

7. The coagulant dosing device according to claim 1, characterized in that: The air outlet pipe is a variable diameter pipe, and the air outlet pipe gradually tapers from the connection point with the air supply branch pipe towards the end.

8. The coagulant dosing device according to claim 1, characterized in that: A turbidity sensor is provided on the outside of the first hollow tube, and a flow valve is provided on the main drug delivery tube. The turbidity sensor is signal-connected to the flow valve.

9. The coagulant dosing device according to claim 1, characterized in that: The gas supply main pipe is equipped with a gas pressure regulating valve, which is signal-connected to a controller. The controller, in conjunction with the gas pressure regulating valve, regulates the gas pressure in the gas supply main pipe.

10. A coagulant dosing device according to claim 1, characterized in that: The first hollow tube and the first connecting part are provided with a sealing structure at the rotatable connection point, and the second hollow tube and the second connecting part are provided with a sealing structure. The sealing structure is a skeleton oil seal or a combination structure of sealing groove and sealing ring.

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