Phosphorus removal dosing device of sewage treatment equipment

Abstract

The utility model relates to the field of sewage treatment, in particular to a dephosphorization dosing device of sewage treatment equipment. The dephosphorization dosing device of the sewage treatment equipment comprises a dosing unit, a water distribution unit, a manhole, a tank bottom micro-aeration stirring unit and a reaction tank, the dosing unit comprises dosing equipment and a dosing pipeline, the water distribution unit comprises a water inlet pipeline and a water distribution pipeline, the water inlet pipeline is arranged at a water inlet in the side wall of the reaction tank, and the water distribution pipeline is arranged at a water outlet in the side wall of the reaction tank. The water distribution pipeline is connected with the water inlet pipeline, the dosing pipeline penetrates through the side wall of the manhole to enter the reaction tank and then goes deep below the middle part of the reaction tank along the inner wall of the water distribution pipeline, a reactant and sewage are partially mixed in the water distribution pipeline, and then the mixed liquid reaches the micro-aeration stirring unit at the bottom of the tank through the water distribution pipeline and is stirred by the device, so that the sewage is fully stirred. And the reactant and the sewage are further fully mixed. According to the device, the mixing degree of a reactant and sewage can be remarkably improved, and the utilization efficiency of the reactant is improved, so that the total phosphorus of effluent can stably reach the standard while the use amount of the reactant is reduced.

Description

Technical Field

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

[0002] With increasingly stringent wastewater treatment effluent standards, traditional integrated wastewater treatment equipment often struggles to meet predetermined standards, particularly in controlling the total phosphorus content. Therefore, current wastewater treatment processes commonly incorporate dedicated phosphorus removal units, which use chemical agents to further reduce the total phosphorus content in the effluent, ensuring it complies with discharge standards.

[0003] However, a common problem exists in this process: in the phosphorus removal dosing unit, the reaction is incomplete due to insufficient mixing of the reactant and the wastewater, resulting in the total phosphorus content in the effluent exceeding the established standard range. In particular, when using iron salts, the color of the effluent fails to meet the standard specifications. Utility Model Content

[0004] To address the aforementioned problems, the main objective of this invention is to provide a phosphorus removal dosing device for wastewater treatment equipment. This device can significantly improve the mixing degree between the reactant and the wastewater, and increase the utilization efficiency of the reactant. This reduces the amount of reactant used, thereby lowering the operating costs of the wastewater treatment plant (station) while ensuring that the total phosphorus content meets the effluent standards. Furthermore, when using iron salts as the reactant, it also ensures that the effluent color meets the standard color requirements.

[0005] This utility model provides a phosphorus removal dosing device for a wastewater treatment equipment, including a dosing unit, a water distribution unit, a manhole, a bottom micro-aeration and stirring unit, and a reaction tank. The dosing unit includes dosing equipment and dosing pipes. The dosing pipes are equipped with regulating valves and pass through the side wall of the manhole into the reaction tank. The water distribution unit includes an inlet pipe and a distribution pipe. An inlet is formed on the side wall of the reaction tank, and the inlet pipe is installed at the inlet. The distribution pipe is connected to the inlet pipe. The bottom micro-aeration and stirring unit includes an air supply pipe and a microporous aeration and stirring pipe.

[0006] According to the present invention, a phosphorus dosing device for a wastewater treatment equipment is provided, wherein the dosing pipe extends along the inner wall of the water distribution pipe to below the middle of the reaction tank.

[0007] According to the present invention, a phosphorus removal dosing device for a wastewater treatment equipment is provided, wherein the water distribution pipe extends to below 2 / 3 of the liquid surface in the reaction tank.

[0008] According to the present invention, a phosphorus removal dosing device for a wastewater treatment equipment is provided, wherein the air supply pipe passes through the manhole and is connected to the microporous aeration and stirring pipe.

[0009] According to the present invention, a phosphorus removal dosing device for a wastewater treatment equipment is provided, wherein the bottom of the reaction tank is designed as a four-sided inclined bucket structure with a slope of not less than 70°.

[0010] According to the present invention, a phosphorus removal dosing device for a wastewater treatment equipment is provided, wherein the microporous aeration and stirring pipe is located in the middle of the inclined bucket at the bottom of the reaction tank and is disposed on its inclined inner wall surface.

[0011] According to the present invention, a phosphorus removal dosing device for a wastewater treatment equipment is provided, wherein a plurality of aeration holes are provided on the microporous aeration and stirring pipe, and the aeration holes are arranged at intervals along the axial direction of the microporous aeration and stirring pipe.

[0012] According to the present invention, a phosphorus removal dosing device for a wastewater treatment equipment is provided, wherein the aeration holes have a diameter of 1-2 mm and are arranged alternately on the microporous aeration and mixing pipe at a downward angle of 45° along the axial direction of the microporous aeration and mixing pipe.

[0013] According to the present invention, a phosphorus removal dosing device for a wastewater treatment equipment is provided, wherein a valve is installed on the gas supply pipeline.

[0014] According to the present invention, a phosphorus removal dosing device for a wastewater treatment equipment is provided, wherein the microporous aeration and stirring pipe is fixed to the inner wall of the inclined bucket at the bottom of the reaction tank by a detachable fixed bracket.

[0015] The above-mentioned technical solution of this utility model has the following beneficial effects:

[0016] This utility model provides a phosphorus removal dosing device for wastewater treatment equipment. The dosing pipe extends into the reaction tank along the inner wall of the water distribution pipe, allowing the reactant and wastewater to partially mix in the water distribution pipe. The mixture then flows out of the water distribution pipe to the micro-aeration and stirring unit at the bottom of the reaction tank. Through the stirring of this device, the reactant and wastewater are further and thoroughly mixed, improving the utilization efficiency of the reactant and ensuring effective reaction between the reactant and wastewater. This significantly reduces the total phosphorus content in the wastewater, ensuring that the total phosphorus index of the effluent consistently meets discharge standards. When using iron salts as a reactant, it also ensures that the effluent color meets the standard color requirements. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a front view of the phosphorus removal dosing device provided by this utility model;

[0019] Figure 2 This is a left view of the phosphorus removal dosing device provided by this utility model;

[0020] Figure 3 This is a top view of the phosphorus removal dosing device provided by this utility model;

[0021] Figure 4 This is a schematic diagram of the opening of the microporous aeration pipe provided by this utility model.

[0022] Figure label:

[0023] 1: Dosing equipment; 2: Dosing pipeline; 3: Manhole; 4: Reaction tank; 5: Inlet; 6: Inlet pipeline; 7: Distribution pipeline; 8: Microporous aeration pipeline; 9: Air supply pipeline; 10: Manual gate valve; 11: Solenoid valve; 12: Inclined bucket; 13: Three-way valve; 14: Aeration hole. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] The preferred embodiments of this utility model are given below with reference to the accompanying drawings to illustrate the technical solution of this utility model in detail.

[0026] like Figures 1-4 As shown in the figure, this embodiment provides a phosphorus removal dosing device for a wastewater treatment equipment.

[0027] The phosphorus removal dosing device of the wastewater treatment equipment described in this embodiment includes a dosing unit, a water distribution unit, a manhole, a bottom micro-aeration and stirring unit, and a reaction tank. An inlet 5 is formed on the side wall of the reaction tank 4, and a manhole 3 is located above the reaction tank 4. Technicians can enter the reaction tank through the manhole 3 to inspect the tank's condition; it can also be used as an observation hole for real-time monitoring of the reaction in the reaction tank 4. The dosing unit introduces the reactant from the dosing equipment into the reaction tank. It includes the dosing equipment 1, a dosing pipe 2, and a regulating valve to control the reactant flow rate. The regulating valve (not shown in the figure) can be installed in an easily accessible position on the dosing pipe between the dosing equipment and the manhole, depending on the actual operating conditions. The water distribution unit introduces wastewater into the reaction tank. It includes an inlet pipe 6 and a distribution pipe 7. The inlet pipe 6 is installed at the inlet 5 and is connected to the distribution pipe 7 via a three-way valve 13. Wastewater enters the inlet pipe from the inlet 5 and flows into the reaction tank through the distribution pipe 7. The bottom micro-aeration and stirring unit is a unit that aerates and stirs through micropores. It includes an air supply pipe 9 and a micropore aeration and stirring pipe 8. The air supply pipe 9 delivers gas to the micropore aeration and stirring pipe 8. The gas enters the reaction tank 4 through the micropores 14 on the micropore aeration and stirring pipe 8, thereby stirring the sewage and making the reactant evenly distributed and fully reacted in the sewage.

[0028] In this embodiment, the dosing pipe 2 passes through the side wall of the manhole 2 and enters the reaction tank 4. Then, it extends along the inner wall of the water distribution pipe 7 to below the middle of the reaction tank 4. Preferably, the water distribution pipe 7 extends to below 2 / 3 of the liquid surface in the reaction tank. This allows the reactant and wastewater to be partially mixed in the water distribution pipe 7 to form a mixture of reactant and wastewater. The mixture then enters the reaction tank and reaches the bottom micro-aeration and stirring unit. The bottom micro-aeration and stirring unit further mixes the reactant, making the reactant more evenly distributed in the wastewater and allowing it to fully react with the wastewater, thereby improving the utilization rate of the reactant.

[0029] The water distribution pipes are made of economical and easy-to-install materials. The pipe diameter is determined according to the equipment flow rate, such as DN50, DN63, DN90, DN110, DN160, etc. In this embodiment, DN160 PVC pipes are used.

[0030] In this embodiment, the bottom of the reaction tank 4 is designed as a four-sided inclined bucket structure with a slope of not less than 70°. The four side walls of the inclined bucket 12 are preferably made of smooth, burr-free plates, and the joints between the plates should also be smooth to avoid forming dead corners. This can prevent the reactant from sticking to the wall and also prevent the sedimentation of wastewater in the reaction tank.

[0031] In this embodiment, the bottom micro-aeration and stirring unit includes an air supply pipe 9 and a microporous aeration and stirring pipe 8. The air supply pipe 9 passes through the manhole sidewall and enters the reaction tank 1, connecting to the microporous aeration and stirring pipe 8. The air supply source delivers gas into the air supply pipe 9, and the gas enters the reaction tank 4 through the micropores 14 on the microporous aeration and stirring pipe 8. The air supply pipe 9 is equipped with valves to control its opening and closing, and valves to control the amount of air intake, preferably a solenoid valve 11 and a manual gate valve 10. The manual gate valve 10 can control the amount of air intake; the solenoid valve 11 can be timed to open and close the air supply pipe through a PLC program, thereby effectively reducing labor costs. Technicians can adjust the PLC program in real time based on the on-site operating conditions to ensure sufficient mixing of the reactant and wastewater, effectively preventing sludge deposition.

[0032] Viewed vertically, the microporous aeration and stirring pipe 8 is located in the middle of the inclined bucket 12 at the bottom of the reaction tank, and is mounted on the inclined inner wall of the inclined bucket 12 by a detachable fixing bracket, preferably arranged horizontally around the four walls of the inclined bucket. The microporous aeration and stirring pipe 8 is provided with multiple aeration holes 14, preferably with a diameter of 1-2 mm, and the aeration holes 14 are spaced apart along the axial direction of the microporous aeration and stirring pipe 8, thus ensuring uniformity and efficiency of aeration.

[0033] In a preferred embodiment, the microporous aeration and stirring pipe 8 is set at a height of 150mm from the bottom of the reaction tank, and is fixed to the inner wall of the inclined bucket 12 at the bottom of the reaction tank by a fixed base, and further secured with binding straps to ensure the stability and reliability of the entire microporous aeration and stirring pipe 8.

[0034] In a preferred embodiment, the aeration holes 14 are staggered along the axis of the microporous aeration and stirring pipe 8 at a certain downward angle α, preferably α is 45°, so as to ensure that the gas can be more effectively dispersed into the reaction tank. The spacing between the aeration holes 14 is set to 200-250mm, which can ensure that the aeration holes 14 are uniformly covered on the microporous aeration and stirring pipe 8, and maximize the utilization of the air intake, avoiding excessive energy consumption.

[0035] In a preferred embodiment, multiple sets of bottom-level micro-aeration and stirring units can be configured, arranged symmetrically around the axis of the reaction tank. It is understood that the number of bottom-level micro-aeration and stirring units is determined based on the size of the reaction tank.

[0036] In a preferred embodiment, the microporous aeration mixing pipe 8 is a PVC pressure pipe, and the pressure that the pipe can withstand is not less than 1.0 MPa. The microporous aeration mixing pipe 8 and the connecting pipe fittings need to be sealed, for example, by using water supply adhesive to bond them together to ensure their airtightness.

[0037] Understandably, in order to ensure stable gas flow, the microporous aeration mixing pipe 8 must be installed horizontally, and the microporous aeration mixing pipe 8 must be firmly and reliably fixed, without any loosening.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A phosphorus removal dosing device for wastewater treatment equipment, characterized in that, include: The system includes a dosing unit, a water distribution unit, a manhole, a bottom micro-aeration and mixing unit, and a reaction tank. The dosing unit includes dosing equipment and dosing pipeline. The dosing pipeline is equipped with a regulating valve and passes through the side wall of the manhole into the reaction tank. The water distribution unit includes an inlet pipe and a distribution pipe. An inlet is formed on the side wall of the reaction tank. The inlet pipe is installed at the inlet, and the distribution pipe is connected to the inlet pipe. The bottom micro-aeration and mixing unit includes an air supply pipe and a microporous aeration and mixing pipe.

2. The phosphorus removal dosing device for wastewater treatment equipment according to claim 1, characterized in that, The dosing pipe extends along the inner wall of the water distribution pipe into the middle and below of the reaction tank.

3. The phosphorus removal dosing device for wastewater treatment equipment according to claim 1, characterized in that, The water distribution pipe extends to below 2 / 3 of the liquid level in the reaction tank.

4. The phosphorus removal dosing device for wastewater treatment equipment according to claim 1, characterized in that, The air supply pipe passes through the manhole and connects to the microporous aeration and stirring pipe.

5. The phosphorus removal dosing device for wastewater treatment equipment according to claim 1, characterized in that, The bottom of the reaction tank is designed as a four-sided inclined bucket structure with a slope of not less than 70°.

6. The phosphorus removal dosing device for wastewater treatment equipment according to claim 1, characterized in that, The microporous aeration and stirring pipe is located in the middle of the inclined bucket at the bottom of the reaction tank and is set on its inclined inner wall surface.

7. The phosphorus removal dosing device for wastewater treatment equipment according to claim 6, characterized in that, The microporous aeration and mixing pipe is provided with multiple aeration holes, which are arranged at intervals along the axial direction of the microporous aeration and mixing pipe.

8. The phosphorus removal dosing device for wastewater treatment equipment according to claim 7, characterized in that, The aeration holes have a diameter of 1-2 mm and are arranged alternately on the microporous aeration and mixing pipe at a downward angle of 45° along the axial direction of the pipe.

9. The phosphorus removal dosing device for wastewater treatment equipment according to claim 1, characterized in that, Valves are installed on the gas supply pipeline.

10. The phosphorus removal dosing device for wastewater treatment equipment according to claim 6, characterized in that, The microporous aeration and stirring pipe is fixed to the inner wall of the inclined bucket at the bottom of the reaction tank by a detachable fixing bracket.

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