Compound fertilizer high-concentration phosphorus-containing wastewater treatment device

Abstract

The utility model discloses a compound fertilizer high-concentration phosphorus-containing wastewater treatment device, which solves the problem that the treatment process of phosphorus-containing wastewater is complicated and tedious, and comprises a plate filter press, an instrument air inlet pipe, an air-drying air inlet pipe, a feed pipe and a filter cloth washing pipe, the plate filter press is connected with an instrument air inlet pipe, the plate filter press is provided with a feeding inlet, the feeding inlet is connected with a feeding pipe, the plate filter press is provided with an air drying opening, the air drying opening is communicated with an air drying air inlet pipe, the plate filter press is provided with a filtrate outlet, and the filtrate outlet is connected with a filtrate outlet pipe. The plate filter press is provided with a filter cloth washing water pipe orifice, the filter cloth washing water pipe orifice is connected with a filter cloth washing water pipe, the plate filter press is connected with a cloth washing wastewater pipe, and the plate filter press is provided with a filter cake outlet. A large number of chemical agents do not need to be added in the operation process of the device, so that the operation cost is reduced, meanwhile, chemical sludge is prevented from being generated, and the environmental pressure is relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of phosphorus wastewater treatment, in particular to a device for treating compound fertilizer high-concentration phosphorus-containing wastewater. Background Art

[0002] During the production of compound fertilizers, a certain amount of phosphorus-containing wastewater will be generated. These wastewaters contain a high level of phosphorus. If they are discharged directly without treatment, they will cause serious pollution to the environment. For the treatment of phosphorus-containing wastewater, chemical precipitation and biological methods are currently the most widely used methods. These methods have high operating costs, complex and tedious processes, and will also produce a large amount of chemical sludge, which is difficult to handle and has high reagent costs. The concentration of residual metal ions generated is also high, and the chromaticity of the effluent increases. Therefore, the research on a series of treatment methods that are low-cost, selective, easy to regenerate, and can recycle phosphorus resources has become a development trend in the field of wastewater treatment research. The development of effective phosphorus-containing wastewater treatment processes is of great significance for protecting the environment and achieving sustainable development. Utility Model Content

[0003] The utility model provides a device for treating high-concentration phosphorus-containing wastewater of compound fertilizer, so as to solve the technical problem that the treatment process of phosphorus-containing wastewater in the production process of compound fertilizer is relatively complicated and tedious.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] The present application provides a device for treating high-concentration phosphorus-containing wastewater from compound fertilizer, comprising a plate filter press, an instrument air inlet pipe, an air-drying inlet pipe, a feed pipe, a filter cloth washing water pipe, a cloth washing waste water pipe, a filtrate outlet pipe, and a filter cake outlet; the plate filter press is connected to the instrument air inlet pipe, and instrument air enters the plate filter press through the instrument air inlet pipe, and the instrument air is used to supply air to the instrument on the plate filter press; the plate filter press is provided with a feed inlet, which is connected to the feed pipe, and the slurry enters the plate filter press through the feed pipe; the plate filter press is provided with an air-drying port, which is connected to the air-drying inlet pipe, and the air-drying gas enters the plate filter press through the air-drying inlet pipe; the plate filter press is provided with a filtrate outlet, which is connected to the filtrate outlet pipe, and the filtrate after filtration enters the raw material wastewater collection pool through the filtrate outlet pipe for recycling; the plate filter press is provided with a filter cloth A washing water pipe outlet, the filter cloth washing water pipe outlet is connected to the filter cloth washing water pipe, and process water enters the plate filter press through the filter cloth washing water pipe; the plate filter press is provided with a filter cloth washing water outlet, and the filter cloth washing water pipe outlet is connected to the cloth washing waste water pipe; the plate filter press is provided with a filter cake outlet, and the air-dried solid material is directly transported to the hopper through the filter cake outlet, and then the solid material is bagged and recycled as raw material; it also includes a hydraulic station and a hydraulic pump, the hydraulic pump is connected between the plate filter press and the hydraulic station, and the hydraulic station provides pressure and flow through the hydraulic pump, so that the hydraulic cylinder and other actuators of the filter press can work normally and complete the compaction and filtration work; the hydraulic station is provided with a coolant inlet pipe and a coolant outlet pipe, the coolant enters from the coolant inlet pipe and then flows out from the coolant outlet pipe, and is reused after being cooled by air, taking away the heat generated by the hydraulic station and discharging it to the outside, thereby achieving the purpose of cooling.

[0006] Furthermore, an air control box is provided on the instrument air intake pipe for controlling the start and stop and speed of the instrument air.

[0007] Furthermore, the air drying air inlet pipe is provided with an air compressor, a compressed air storage tank and an air drying valve. The air compressor outlet is connected to the compressed air storage tank inlet, and the compressed air storage tank outlet is connected to the air drying valve. The air drying valve is used to control the start and stop of the air drying gas and adjust the size of the air drying gas.

[0008] Furthermore, the feed pipe is provided with a slurry tank, a feed pump and a feed valve. The slurry tank is provided with an agitator to stir the added slurry. The outlet of the slurry tank is connected to the inlet of the feed pump, and the outlet of the feed pump is connected to the feed valve. The stirred slurry in the slurry tank is pumped into the plate filter press through the feed pump, and the size of the slurry entering and the opening and closing of the feed pipe are controlled by the feed valve.

[0009] Furthermore, the filter cloth washing water pipe is provided with a clean water tank, a filter cloth washing water pump and a cleaning valve. The outlet of the clean water tank is connected to the inlet of the filter cloth washing water pump, and the outlet of the washing water pump is connected to the cleaning valve. The process water in the clean water tank is pumped into the plate filter press through the filter cloth washing water pump, and the size of the process water entering and the opening and closing of the filter cloth washing water pipe are controlled by the cleaning valve.

[0010] Furthermore, the slurry tank is provided with a first liquid level indicator, and the clean water tank is provided with a second liquid level indicator, which facilitates the control of the liquid levels of the slurry and process water, ensures the continuity and stability during the treatment process, and avoids interruptions or waste in the production process by timely adjusting the liquid level height, thereby improving production efficiency.

[0011] Beneficial effects achieved by this utility model:

[0012] (1) The compound fertilizer high-concentration phosphorus-containing wastewater treatment system provided by the utility model realizes the effective separation of solid and liquid in phosphorus-containing wastewater through the filtration action of the plate filter press, greatly improving the phosphorus removal efficiency; the solid material (filter cake) after the filtration treatment is rich in phosphorus element and can be further processed as a raw material for phosphate fertilizer or other phosphorus chemical products, thereby realizing the effective recycling of phosphorus resources.

[0013] (2) The compound fertilizer high-concentration phosphorus-containing wastewater treatment system provided by the utility model does not require the addition of a large amount of chemical agents during the operation of the device, which reduces the operating cost, avoids the generation of chemical sludge, and alleviates environmental pressure. In addition, the device is reasonably designed, easy to operate, and easy to automatically control, which reduces the difficulty of operation and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a process flow chart of an embodiment of the utility model;

[0015] Reference numerals:

[0016] 1. Plate filter press; 2. Air control box; 3. Air compressor; 4. Compressed air storage tank; 5. Air drying valve; 6. Slurry tank; 7. Agitator; 8. Feed pump; 9. Feed valve; 10. Clean water tank; 11. Filter cloth wash pump; 12. Cleaning valve; 13. Hydraulic station; 14. Hydraulic pump; 15. First liquid level indicator; 16. Second liquid level indicator; 17. Instrument air inlet pipe; 18. Air drying inlet pipe; 19. Feed pipe; 20. Filter cloth wash pipe; 21. Coolant inlet pipe; 22. Coolant outlet pipe; 23. Cloth wash waste water pipe; 24. Filtrate outlet pipe; 25. Filter cake outlet.

[0017] The accompanying drawings are for illustrative purposes only and should not be construed as limitations on this patent. To better illustrate this embodiment, some components of the accompanying drawings may be omitted, enlarged, or reduced in size and do not represent the actual dimensions of the product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted from the accompanying drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limitations on this patent. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0019] The technical solution of the present invention is described in detail below with reference to the accompanying drawings.

[0020] like Figure 1 As shown, a compound fertilizer high-concentration phosphorus-containing wastewater treatment device includes a plate filter press 1, an air control box 2, an air compressor 3, a compressed air storage tank 4, an air drying valve 5, a slurry tank 6, an agitator 7, a feed pump 8, a feed valve 9, a clean water tank 10, a filter cloth washing pump 11, a cleaning valve 12, a hydraulic station 13, a hydraulic pump 14, a first liquid level indicator 15, a second liquid level indicator 16, an instrument air inlet pipe 17, an air drying inlet pipe 18, a feed pipe 19, a filter cloth washing pipe 20, a coolant inlet pipe 21, a coolant outlet pipe 22, a cloth washing wastewater pipe 23, a filtrate outlet pipe 24, and a filter cake outlet 25;

[0021] The plate filter press 1 is connected to the instrument air inlet pipe 17, and the instrument air enters the plate filter press 1 through the instrument air inlet pipe 17, and the instrument air is used to supply air to the instruments on the plate filter press 1; the plate filter press 1 is provided with a feed inlet, and the feed inlet is connected to the feed pipe 19, and the slurry enters the plate filter press 1 through the feed pipe 19; the plate filter press 1 is provided with an air-drying port, and the air-drying port is connected to the air-drying air inlet pipe 18, and the air-drying air enters the plate filter press 1 through the air-drying air inlet pipe 18; the plate filter press 1 is provided with a filtrate outlet, and the filtrate outlet is connected to the filtrate outlet. The plate filter press 1 is connected to the filter cloth washing pipe 20, and the filtrate after filtration enters the raw material wastewater collection pool for recycling through the filtrate outlet pipe 24; the plate filter press 1 is provided with a filter cloth washing water outlet, which is connected to the filter cloth washing water pipe 20, and the process water enters the plate filter press 1 through the filter cloth washing water pipe 20; the plate filter press 1 is provided with a filter cloth washing water outlet, which is connected to the cloth washing wastewater pipe 23; the plate filter press 1 is provided with a filter cake outlet 25, and the air-dried solid material is directly transported to the hopper through the filter cake outlet 25, and the solid material is then bagged and recycled as raw material;

[0022] It also includes a hydraulic station 13 and a hydraulic pump 14. The hydraulic pump 14 is connected between the plate filter press 1 and the hydraulic station 13. The hydraulic station 13 provides pressure and flow through the hydraulic pump 14, so that the hydraulic cylinder and other actuators of the filter press can work normally and complete the compaction and filtration work; the hydraulic station 13 is provided with a coolant inlet pipe 21 and a coolant outlet pipe 22. The coolant enters from the coolant inlet pipe 21 and flows out from the coolant outlet pipe 22. After being cooled by air, it is reused to take away the heat generated by the hydraulic station 13 and discharge it to the outside, thereby achieving the purpose of cooling.

[0023] The instrument air inlet pipe 17 is provided with an air control box 2 for controlling the start, stop and speed of the instrument air.

[0024] The air drying air inlet pipe 18 is provided with an air compressor 3, a compressed air storage tank 4 and an air drying valve 5. The outlet of the air compressor 3 is connected to the inlet of the compressed air storage tank 4, and the outlet of the compressed air storage tank 4 is connected to the air drying valve 5. The air drying valve 5 is used to control the start and stop of the air drying gas and adjust the size of the air drying gas.

[0025] The feed pipe 19 is provided with a slurry tank 6, a feed pump 8 and a feed valve 9. The slurry tank 6 is provided with a stirrer 7 for stirring the added slurry. The outlet of the slurry tank 6 is connected to the inlet of the feed pump 8, and the outlet of the feed pump 8 is connected to the feed valve 9. The stirred slurry in the slurry tank 6 is pumped into the plate filter press 1 through the feed pump 8, and the size of the slurry entering and the opening and closing of the feed pipe 19 are controlled by the feed valve 9.

[0026] The filter cloth washing water pipe 20 is provided with a clean water tank 10, a filter cloth washing water pump 11 and a cleaning valve 12. The outlet of the clean water tank 10 is connected to the inlet of the filter cloth washing water pump 11, and the outlet of the washing water pump 11 is connected to the cleaning valve 12. The process water in the clean water tank 10 is pumped into the plate filter press 1 through the filter cloth washing water pump 11, and the size of the process water entering and the opening and closing of the filter cloth washing water pipe 20 are controlled by the cleaning valve 12.

[0027] The slurry tank 6 is provided with a first liquid level indicator 15, and the clean water tank 10 is provided with a second liquid level indicator 16, which are convenient for controlling the liquid levels of the slurry and process water, ensuring the continuity and stability during the treatment process, and avoiding interruptions or waste in the production process by timely adjusting the liquid level height, thereby improving production efficiency.

[0028] The following is a detailed description of the operation of the above-mentioned compound fertilizer high-concentration phosphorus wastewater treatment system:

[0029] The phosphorus-containing wastewater is first heated and evaporated. After the concentrated wastewater reaches a certain concentration, the temperature of the concentrated wastewater is reduced to 50°C, and the solid content in the wastewater is above 35%, forming a phosphorus-containing wastewater slurry. The slurry enters a slurry tank 6 for stirring, and is then pumped into a plate filter press 1 by a feed pump 8 for pressure filtration. The filtrate, which does not contain solids, enters a filtrate outlet pipe 24 and is then passed into a collection tank for recycling. The solid material after pressure filtration will remain on the filter cloth of the plate filter press 1. The solid material is then air-dried by compressed air to obtain a solid material with a moisture content of ≤25%. The air-dried solid material is directly transported to a hopper through the running filter cloth of the plate filter press 1. The solid material is then bagged and recycled as raw material. The solid material (filter cake) after pressure filtration is rich in phosphorus and can be further processed as a raw material for phosphate fertilizer or other phosphorus chemical products, thus achieving effective recycling of phosphorus resources without causing any environmental pollution. The process water is pumped into the plate filter press 1 through the washing water pump 11 , the filter cloth placed in the plate filter press 1 is cleaned, and the cloth washing waste water flows out from the filter cloth washing water pipe 20 .

[0030] The serial numbers of the embodiments of this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are only preferred embodiments of this application and do not limit the scope of the patent of this application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of this application.

Claims

1. A compound fertilizer high-concentration phosphorus-containing wastewater treatment device, characterized in that: It includes a plate filter press (1), an instrument air inlet pipe (17), an air drying inlet pipe (18), a feed pipe (19), a filter cloth washing pipe (20), a cloth washing waste water pipe (23), a filtrate outlet pipe (24), and a filter cake outlet (25); wherein, The plate filter press (1) is connected to the instrument air inlet pipe (17), and the instrument air enters the plate filter press (1) through the instrument air inlet pipe (17); the plate filter press (1) is provided with a feed inlet, and the feed inlet is connected to the feed pipe (19), and the slurry enters the plate filter press (1) through the feed pipe (19); the plate filter press (1) is provided with an air drying port, and the air drying port is connected to the air drying inlet pipe (18), and the air drying air enters the plate filter press (1) through the air drying inlet pipe (18); the plate filter press (1) is provided with a filtrate outlet, and the The filtrate outlet is connected to the filtrate outlet pipe (24); the plate filter press (1) is provided with a filter cloth washing water outlet, the filter cloth washing water outlet is connected to the filter cloth washing water pipe (20), and process water enters the plate filter press (1) through the filter cloth washing water pipe (20); the plate filter press (1) is provided with a filter cloth washing water outlet, the filter cloth washing water outlet is connected to the cloth washing waste water pipe (23); the plate filter press (1) is provided with a filter cake outlet (25), and the air-dried solid material is directly transported to the hopper through the filter cake outlet (25), and the solid material is then bagged and recycled as raw material; It also includes a hydraulic station (13) and a hydraulic pump (14), wherein the hydraulic pump (14) is connected between the plate filter press (1) and the hydraulic station (13), and the hydraulic station (13) is provided with a coolant inlet pipe (21) and a coolant outlet pipe (22).

2. A compound fertilizer high-concentration phosphorus-containing wastewater treatment device according to claim 1, characterized in that: An air control box (2) is provided on the instrument air intake pipe (17).

3. A compound fertilizer high-concentration phosphorus-containing wastewater treatment device according to claim 1, characterized in that: The air-drying air inlet pipe (18) is provided with an air compressor (3), a compressed air storage tank (4) and an air-drying valve (5); the outlet of the air compressor (3) is connected to the inlet of the compressed air storage tank (4), and the outlet of the compressed air storage tank (4) is connected to the air-drying valve (5).

4. A compound fertilizer high-concentration phosphorus-containing wastewater treatment device according to claim 1, characterized in that: The feed pipe (19) is provided with a slurry tank (6), a feed pump (8) and a feed valve (9). The slurry tank (6) is provided with a stirrer (7) for stirring the added slurry. The outlet of the slurry tank (6) is connected to the inlet of the feed pump (8), and the outlet of the feed pump (8) is connected to the feed valve (9). The stirred slurry in the slurry tank (6) is pumped into the plate filter press (1) through the feed pump (8). The size of the slurry entering and the opening and closing of the feed pipe (19) are controlled by the feed valve (9).

5. A compound fertilizer high-concentration phosphorus-containing wastewater treatment device according to claim 4, characterized in that: The filter cloth washing water pipe (20) is provided with a clean water tank (10), a filter cloth washing water pump (11) and a cleaning valve (12). The outlet of the clean water tank (10) is connected to the inlet of the filter cloth washing water pump (11), and the outlet of the cleaning water pump (11) is connected to the cleaning valve (12). The process water in the clean water tank (10) is pumped into the plate filter press (1) through the filter cloth washing water pump (11). The amount of process water entering and the opening and closing of the filter cloth washing water pipe (20) are controlled by the cleaning valve (12).

6. A compound fertilizer high-concentration phosphorus-containing wastewater treatment device according to claim 5, characterized in that: The slurry tank (6) is provided with a first liquid level indicator (15), and the clean water tank (10) is provided with a second liquid level indicator (16).

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