Efficient phosphorus and nitrogen removal device for sewage treatment

Abstract

This utility model proposes a high-efficiency phosphorus and nitrogen removal device for wastewater treatment, relating to the field of wastewater phosphorus and nitrogen removal technology. It includes a treatment tank, cover plate, inlet pipe, chemical inlet pipe, tee pipe, solenoid valve, mixing and scraping assembly, temporary storage assembly, installation assembly, filter screen, installation plate, and suction pump. This device allows for the sequential addition of phosphorus and nitrogen removal agents to the treatment tank in stages. After addition, the wastewater is thoroughly mixed with the agents under the synergistic action of the temporary storage assembly and the mixing and scraping assembly. After phosphorus and nitrogen removal, the wastewater passes through the temporary storage assembly and moves towards the filter screen, where sludge remains. Wastewater flows through the filter screen to the bottom of the treatment tank, and finally, the wastewater is transferred by the suction pump. When sludge accumulates on the filter screen, it can be easily removed and replaced. The filter screen is low-cost and does not require cleaning, thus optimizing the sludge discharge process. In summary, the wastewater phosphorus and nitrogen removal process is superior.

Description

Technical Field

[0001] This utility model relates to the field of wastewater phosphorus and nitrogen removal technology, and more specifically, to a high-efficiency phosphorus and nitrogen removal device for wastewater treatment. Background Technology

[0002] Wastewater phosphorus and nitrogen removal is a process that uses biological and chemical methods to remove phosphorus and nitrogen elements from wastewater to meet discharge standards. For example, chemical agents such as coagulants and oxidants are added to the wastewater to convert phosphorus and nitrogen into insoluble or sparingly soluble substances, thereby removing phosphorus and nitrogen from the wastewater.

[0003] When existing sewage treatment equipment is in use, the dirt and chemicals in the sewage tend to adhere to the inner wall of the tank, making it difficult to scrape them off during the mixing process. This makes internal cleaning inconvenient, and the settled sludge and residues tend to remain inside, making them difficult to collect and discharge.

[0004] Announcement No. CN222226039U proposes a wastewater treatment device for phosphorus and nitrogen removal. This device can scrape off adhering dirt and residues while stirring and mixing, which facilitates cleaning of the inside of the tank and the collection and discharge of sludge sediment for future use. However, the sludge in the wastewater has a high water content, which makes it easy for it to adhere to the blades of the screw rod, affecting the sludge conveying effect. The screw rod is located at the bottom of the tank, making cleaning inconvenient. Utility Model Content

[0005] The purpose of this invention is to solve the problems mentioned in the background art and to propose a high-efficiency phosphorus and nitrogen removal device for wastewater treatment.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A high-efficiency phosphorus and nitrogen removal device for wastewater treatment includes a treatment tank, a cover plate, an inlet pipe, a chemical inlet pipe, a tee pipe, a solenoid valve, a mixing and scraping assembly, a temporary storage assembly, an installation assembly, a filter screen, an installation plate, and a suction pump.

[0008] The cover plate is removably installed on top of the processing tank;

[0009] The water inlet pipe, the medicine inlet pipe, and the mixing and scraping assembly are all installed on the cover plate;

[0010] One of the three-way pipes is connected to the inlet pipe, and the other two pipes of the three-way pipe are each equipped with an independently controlled solenoid valve. The other two pipes of the three-way pipe are respectively connected to the phosphorus removal agent metering and delivery component and the denitrification agent metering and delivery component via flexible hoses.

[0011] The temporary storage component is fixed inside the processing tank and located below the mixing and scraping component;

[0012] The mounting components are movably connected to the front side wall of the processing box;

[0013] The filter screen has symmetrically arranged mounting plates that abut against the mounting components;

[0014] The suction pump is connected to the bottom of the treatment tank, and the suction line of the suction pump is located below the mounting components.

[0015] Furthermore, the mixing and scraping assembly includes a drive motor, a rotating shaft, a first mixing roller, a second mixing roller, and a scraper rod.

[0016] The drive motor is fixed to the cover plate and is connected to a rotating shaft inside the processing box;

[0017] The inclined first stirring roller and the horizontal second stirring roller are staggered along the height direction of the rotating shaft;

[0018] The scraper bar that contacts the inner wall of the processing tank is connected to the end of the second mixing roller.

[0019] Furthermore, the temporary storage component includes an arc-shaped platform, a feeding pipe, and an electric valve.

[0020] An arc-shaped platform, high around the perimeter and low in the center, is fixed inside the processing box. The arc-shaped platform is spaced apart from the rotating shaft and the scraper rod, and a material leakage hole is opened in the center of the arc-shaped platform.

[0021] The feeding pipe is fixed at the bottom of the arc-shaped platform and connected to the material leakage hole. An electric valve is installed on the feeding pipe.

[0022] Furthermore, the mounting assembly includes a mounting frame, a sealing plate, and a handle.

[0023] The mounting frame, which is open at both the top and bottom, is inserted into the inner wall of the treatment box, and the upper surface of the mounting frame abuts against the mounting plate, while the outer wall of the filter screen fits against the inner wall of the mounting frame.

[0024] The sealing plate is fixed to the front side of the mounting frame, and a handle is provided on the outside of the sealing plate;

[0025] A storage slot is provided on the front side wall of the processing box. The storage slot is the same size as the sealing plate and has a hole that allows the installation frame and the installation plate to pass through.

[0026] Furthermore, a transparent observation window is provided on the front side wall of the processing box.

[0027] Furthermore, the phosphorus removal agent metering and delivery assembly includes a first metering pump and a phosphorus removal agent tank. The first metering pump is connected to a pipeline of a three-way pipe via a flexible hose, and the first metering pump is connected to the phosphorus removal agent tank.

[0028] Furthermore, the denitrification agent metering and delivery assembly includes a second metering pump and a denitrification agent tank. The second metering pump is connected to another pipeline of the tee pipe via a flexible hose, and the second metering pump is also connected to the denitrification agent tank.

[0029] Compared with the prior art, the beneficial effects of this utility model are:

[0030] Compared to existing technologies, this device allows for the sequential addition of phosphorus and nitrogen removal agents to the treatment tank in stages. After addition, the wastewater is thoroughly mixed with the agents under the synergistic action of the temporary storage component and the mixing and scraping component. Once the phosphorus and nitrogen removal treatment is complete, the wastewater passes through the temporary storage component and moves towards the filter screen. Sludge is then retained on the filter screen, while wastewater flows through the filter screen to the bottom of the treatment tank. Finally, the wastewater is transferred by a suction pump. When sludge accumulates on the filter screen, it can be easily removed and replaced. The filter screen is low-cost and does not require cleaning, thus optimizing the sludge discharge process. In summary, the wastewater phosphorus and nitrogen removal treatment process is superior. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0032] Figure 2 This is a schematic diagram of a transparent viewing window;

[0033] Figure 3 This is a schematic diagram showing the fit between the filter screen and the mounting frame.

[0034] Figure label:

[0035] 1. Processing tank; 2. Cover plate; 3. Water inlet pipe; 4. Medicine inlet pipe; 5. T-connector; 6. Solenoid valve; 7. Filter screen; 8. Mounting plate; 9. Suction pump; 10. Drive motor; 11. Rotary shaft; 12. First stirring roller; 13. Second stirring roller; 14. Scraper bar; 15. Arc-shaped platform; 16. Discharge pipe; 17. Electric valve; 18. Mounting frame; 19. Sealing plate; 20. Handle; 21. Transparent observation window. Detailed Implementation

[0036] The technical solutions of the present utility model 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 the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0037] like Figures 1 to 3As shown, a high-efficiency phosphorus and nitrogen removal device for wastewater treatment includes a treatment tank 1, a cover plate 2, an inlet pipe 3, a chemical inlet pipe 4, a tee pipe 5, a solenoid valve 6, a mixing and scraping assembly, a temporary storage assembly, an installation assembly, a filter screen 7, an installation plate 8, and a suction pump 9.

[0038] The cover plate 2 is movably installed on the top of the processing box 1 (specifically, a corresponding fixing plate is fixed on the cover plate 2 and the processing box 1 and locked by fixing bolts);

[0039] Water inlet pipe 3, medicine inlet pipe 4, and mixing and scraping assembly are all installed on cover plate 2;

[0040] One of the pipes of the three-way pipe 5 is connected to the inlet pipe 4. The remaining two pipes of the three-way pipe 5 are each equipped with an independently controlled solenoid valve 6. The remaining two pipes of the three-way pipe 5 are respectively connected to the phosphorus removal agent metering and delivery component and the denitrification agent metering and delivery component through flexible hoses.

[0041] The temporary storage component is fixed inside the processing box 1 and located below the mixing and scraping component;

[0042] The mounting components are movably connected to the front side wall of the processing box 1;

[0043] The filter screen 7 is symmetrically provided with mounting plates 8 that abut against the mounting components;

[0044] The suction pump 9 is connected to the bottom of the processing tank 1 and the suction line of the suction pump 9 is located below the mounting assembly.

[0045] In a further refinement of the embodiment of this utility model, the phosphorus removal agent metering and delivery assembly includes a first metering pump and a phosphorus removal agent tank. The first metering pump is connected to a pipeline of a three-way pipe through a flexible hose and is also connected to the phosphorus removal agent tank (the first metering pump and the phosphorus removal agent tank are not shown in the figure).

[0046] In a further refinement of the embodiment of this utility model, the denitrification agent metering and delivery assembly includes a second metering pump and a denitrification agent tank. The second metering pump is connected to another pipeline of the three-way pipe through a flexible hose and is also connected to the denitrification agent tank (the second metering pump and the denitrification agent tank are not shown in the figure).

[0047] To ensure thorough mixing of the wastewater and the reagent, the above-described embodiments are further refined, such as... Figure 1 As shown, the mixing and scraping assembly includes a drive motor 10, a rotating shaft 11, a first mixing roller 12, a second mixing roller 13, and a scraper rod 14.

[0048] The drive motor 10 is fixed on the cover plate 2 and the drive motor 10 is connected to the rotating shaft 11 located inside the processing box 1;

[0049] The inclined first stirring roller 12 and the horizontal second stirring roller 13 are staggered along the height direction of the rotating shaft 11;

[0050] The scraper rod 14, which is in contact with the inner wall of the processing box 1, is connected to the end of the second stirring roller 13.

[0051] To ensure that the wastewater remains in a fixed area within treatment tank 1 after being added, thereby completing the chemical phosphorus and nitrogen removal process, the above-described embodiment is further refined as follows: Figure 1 As shown, the temporary storage assembly includes an arc-shaped platform 15, a feeding pipe 16, and an electric valve 17.

[0052] An arc-shaped platform 15, which is high around the edges and low in the center, is fixed inside the processing box 1. The arc-shaped platform 15 is distributed at intervals with the rotating shaft 11 and the scraper 14. A material leakage hole is opened in the center of the arc-shaped platform 15 (the material leakage hole is not shown in the figure).

[0053] The feeding pipe 16 is fixed at the bottom of the arc-shaped platform 15 and connected to the material leakage hole. An electric valve 17 is installed on the feeding pipe 16.

[0054] To facilitate easy replacement of filter 7, the above embodiment solution is further refined as follows: Figures 1 to 3 As shown, the mounting components include a mounting frame 18, a sealing plate 19, and a handle 20.

[0055] The mounting frame 18, which is open at both the top and bottom, is inserted into the inner wall of the processing box 1, and the upper surface of the mounting frame 18 abuts against the mounting plate 8. The outer wall of the filter screen 7 fits against the inner wall of the mounting frame 18 (specifically, the processing box 1 is symmetrically fixed with slots that cooperate with the mounting frame 18, and the slots are not numbered in the figure).

[0056] The sealing plate 19 is fixed to the front side of the mounting frame 18, and a handle 20 is provided on the outer side of the sealing plate 19;

[0057] A storage slot is provided on the front side wall of the processing box 1. The storage slot is the same size as the sealing plate 19 and has a socket that allows the mounting frame 18 and the mounting plate 8 to pass through (the storage slot and the socket are not shown in the figure, and the height of the socket is just enough to allow the mounting plate 8 and the mounting frame 18 to pass through).

[0058] To control the amount of wastewater added to treatment tank 1, further optimizations to the above-described embodiments are possible, such as... Figure 2 As shown, a transparent observation window 21 is provided on the front side wall of the processing box 1.

[0059] It should be noted that the first metering pump, the second metering pump, the solenoid valve 6, the electric valve 17, the drive motor 10, and the suction pump 9 are all electrically connected to the controller, which is not labeled in the figure.

[0060] The working process of this utility model:

[0061] First, wastewater is introduced into the treatment tank 1 through the inlet pipe 3. During the process, the height of the wastewater in the treatment tank 1 is monitored in real time through the transparent observation window 21. When the level of the wastewater can be seen by looking straight through the transparent observation window 21, the introduction is stopped. At this time, the amount of wastewater added can be limited to avoid too much or too little wastewater.

[0062] The controller then controls the first metering pump to work, which allows the pre-set volume of phosphorus removal agent to be added to the wastewater in a quantitative manner (the solenoid valve 6 connected to the first metering pump is opened). This application adopts a method of adding different agents in stages to avoid the problem of competition and interference between metal salts and carbon sources. After the phosphorus removal agent is added, the controller controls the stirring and scraping assembly to operate, which allows the wastewater and phosphorus removal agent to be fully mixed and precipitate to be generated. At the same time, the scraper 14 can contact the inner wall of different areas of the treatment tank 1 in real time to reduce the residue on the inner wall.

[0063] After the phosphorus removal agent is added and mixed with the wastewater, the controller controls the second metering pump to inject the denitrification agent into the treatment tank 1 in a metered manner, and then the denitrification process can begin (the solenoid valve 6 connected to the second metering pump is opened). After the phosphorus and denitrification of the wastewater is completed, the controller controls the electric valve 17 to open, so that the wastewater and sludge sediment can flow downward together. The sludge sediment is left on the filter screen 7, and the remaining water flows downward. Finally, the controller controls the suction pump 9 to operate, so that the phosphorus and denitrification wastewater can be transported to the next area for further processing.

[0064] After completing one round of wastewater treatment, pull the handle 20 outward from the outside of the treatment tank 1 to remove the installation frame 18, then remove and replace the filter screen 7. After the new filter screen 7 is placed back in place, insert the installation frame 18 back into the treatment tank 1 to start a new round of wastewater phosphorus and nitrogen removal process.

[0065] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency phosphorus and nitrogen removal device for wastewater treatment, characterized in that, Includes a processing tank (1), a cover plate (2), a water inlet pipe (3), a medicine inlet pipe (4), a tee pipe (5), a solenoid valve (6), a mixing and scraping assembly, a temporary storage assembly, an installation assembly, a filter screen (7), an installation plate (8), and a suction pump (9). The cover plate (2) is movably installed on top of the processing box (1); The water inlet pipe (3), the medicine inlet pipe (4), and the mixing and scraping assembly are all installed on the cover plate (2); One of the pipes of the three-way pipe (5) is connected to the inlet pipe (4), and the remaining two pipes of the three-way pipe (5) are respectively equipped with independently controlled solenoid valves (6), and the remaining two pipes of the three-way pipe (5) are respectively connected to the phosphorus removal agent metering and delivery component and the denitrification agent metering and delivery component through hoses. The temporary storage component is fixed inside the processing box (1) and located below the mixing and scraping component; The mounting components are movably connected to the front side wall of the processing box (1); The filter screen (7) is symmetrically provided with mounting plates (8) that abut against the mounting components; The suction pump (9) is connected to the bottom of the processing tank (1) and the suction line of the suction pump (9) is located below the mounting assembly.

2. The wastewater treatment high-efficiency phosphorus and nitrogen removal device according to claim 1, characterized in that, The mixing and scraping assembly includes a drive motor (10), a rotating shaft (11), a first mixing roller (12), a second mixing roller (13), and a scraper (14). The drive motor (10) is fixed on the cover plate (2) and the drive motor (10) is connected to the rotating shaft (11) inside the processing box (1); The inclined first stirring roller (12) and the horizontal second stirring roller (13) are staggered along the height direction of the rotating shaft (11); The scraper rod (14) that is in contact with the inner wall of the processing box (1) is connected to the end of the second stirring roller (13).

3. The wastewater treatment high-efficiency phosphorus and nitrogen removal device according to claim 2, characterized in that, The temporary storage assembly includes an arc-shaped platform (15), a feeding pipe (16), and an electric valve (17). An arc-shaped platform (15) with a high perimeter and a low center is fixed inside the processing box (1), and the arc-shaped platform (15) is distributed at intervals with the rotating shaft (11) and the scraper (14). A material leakage hole is opened in the center of the arc-shaped platform (15). The feeding pipe (16) is fixed at the bottom of the arc-shaped platform (15) and connected to the material leakage hole. An electric valve (17) is installed on the feeding pipe (16).

4. The wastewater treatment high-efficiency phosphorus and nitrogen removal device according to claim 1, characterized in that, The mounting components include a mounting frame (18), a sealing plate (19), and a handle (20). The mounting frame (18), which is open at both the top and bottom, is inserted into the inner wall of the processing box (1), and the upper surface of the mounting frame (18) abuts against the mounting plate (8), and the outer wall of the filter screen (7) is in contact with the inner wall of the mounting frame (18). The sealing plate (19) is fixed to the front side of the mounting frame (18), and a handle (20) is provided on the outside of the sealing plate (19); The front side wall of the processing box (1) is provided with a storage slot, which is the same size as the sealing plate (19) and has a hole on the storage slot that allows the mounting frame (18) and the mounting plate (8) to pass through.

5. The wastewater treatment high-efficiency phosphorus and nitrogen removal device according to claim 1, characterized in that, A transparent observation window (21) is provided on the front side wall of the processing box (1).

6. The wastewater treatment high-efficiency phosphorus and nitrogen removal device according to claim 1, characterized in that, The phosphorus removal agent metering and delivery assembly includes a first metering pump and a phosphorus removal agent tank. The first metering pump is connected to a pipeline of a three-way pipe via a flexible hose, and the first metering pump is also connected to the phosphorus removal agent tank.

7. The wastewater treatment high-efficiency phosphorus and nitrogen removal device according to claim 1, characterized in that, The denitrification agent metering and delivery assembly includes a second metering pump and a denitrification agent tank. The second metering pump is connected to another pipeline of the tee pipe via a flexible hose and is also connected to the denitrification agent tank.

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