Phosphorus-containing wastewater recovery treatment device

Abstract

The utility model discloses a phosphorus-containing wastewater recovery and treatment device, which relates to the technical field of wastewater treatment and comprises a wastewater pool, an evaporation pool, a pH (potential of hydrogen) regulating pool, a sedimentation pool and a fine filter which are connected in series through guide pipes, and the inlet of the wastewater pool is connected with a water inlet pipe. According to the utility model, the evaporation pond, the pH adjusting pond and the settling pond are arranged in sequence, the evaporation pond is used for directly concentrating and recycling high-concentration washing after chemical polishing, so that wastewater is changed into waste tank liquid, the recycled waste tank liquid can be further treated and utilized, and the cyclic utilization of resources is realized; compared with a process of directly neutralizing phosphorus-containing wastewater, the evaporated waste bath solution needs less liquid caustic soda in a subsequent process of neutralizing by using liquid caustic soda, so that the cost is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of wastewater treatment, and in particular relates to a phosphorus-containing wastewater recovery and treatment device. Background Art

[0002] Anodic oxidation refers to the process of using a certain metal (mainly aluminum) as the anode and electrolyzing in a suitable electrolyte to form an inorganic oxide film on the surface of the part. The metal oxide film has corrosion resistance, wear resistance, insulation and other properties, and can be used as a protective layer for metals or a base layer for paint. A large amount of anodizing wastewater is generated as a result. The total amount of phosphorus sulfuric acid used in the anode line is large every day, and the cost of using phosphorus sulfuric acid is high. In addition, the wastewater after production is discharged to the wastewater station. Every year, factories and enterprises will produce a large amount of phosphorus-containing wastewater that needs to be treated. At present, when treating phosphorus-containing wastewater, it is necessary to add liquid alkali and use MVR evaporation to treat it. Use alkali solution to adjust the pH of the wastewater to weak alkalinity, then add a certain amount of phosphorus removal agent, fully stir the reaction, and flocculate and precipitate after the reaction is completed. The filtrate is discharged after solid-liquid separation. This method requires adding phosphorus removal agents directly to the wastewater, resulting in a waste of agents and an increase in the amount of sludge produced. It fails to fundamentally reduce the operating costs and is costly, complicated to operate, and energy intensive. In addition, excessive sludge in the sedimentation tank will also affect the sedimentation effect of the sedimentation tank, thereby affecting the wastewater treatment efficiency. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model provides a phosphorus-containing wastewater recovery and treatment device, which directly concentrates and recovers the high-concentration water washing after chemical disposal, evaporates the wastewater after chemical disposal through high temperature, turns the wastewater into waste tank liquid, collects it, and recycles it, thereby reducing costs.

[0004] The utility model solves the technical problem by adopting the following scheme: a phosphorus-containing wastewater recovery and treatment device comprises a wastewater pool, an inlet of the wastewater pool is connected with a water inlet pipe, an evaporation pool, a pH adjustment pool, a sedimentation pool and a fine filter pool, the wastewater pool, the evaporation pool, the pH adjustment pool, the sedimentation pool and the fine filter pool are connected in series through a conduit, and a pump and a one-way valve are installed on the conduit, a crossbeam is arranged on the top of the pH adjustment pool, a liquid alkali storage tank is fixed on the crossbeam, a pH meter and a stirring assembly are installed in the pH adjustment pool, the sedimentation pool is divided into a clear liquid layer and a sedimentation layer from top to bottom, a plurality of guide paddles are horizontally arranged and rotatably sleeved in the sedimentation layer at the bottom of the sedimentation pool, and the plurality of guide paddles are connected through a sprocket group transmission, and a driving motor for controlling the rotation of the sprocket group is installed on the sedimentation pool, a filter press is arranged on the side of the sedimentation pool, a discharge notch is opened at the bottom of the sedimentation pool, the discharge notch corresponds to the material inlet of the filter press, and a baffle is provided at the outlet of the discharge notch.

[0005] Furthermore, the outlet of the wastewater pool and the inlet of the evaporation pool are connected through a wastewater pipe, the outlet of the evaporation pool and the inlet of the pH adjustment pool are connected through a waste tank liquid pipe, the outlet of the pH adjustment pool and the inlet of the sedimentation pool are connected through a neutralization liquid pipe, the clear liquid layer of the sedimentation pool is connected to the inlet of the fine filter pool through a second liquid extraction pipe, and the outlet of the fine filter pool is connected with a drain pipe.

[0006] Furthermore, two sedimentation tanks are provided, and the clear liquid layers of adjacent sedimentation tanks are connected via a top liquid extraction pipe.

[0007] Furthermore, the stirring assembly includes a stirring motor installed on the crossbeam, and the output end of the stirring motor is connected to a stirring paddle located in the pH adjustment tank.

[0008] Furthermore, the evaporation tank is connected to a steam compressor via a steam pipeline.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The utility model sequentially arranges an evaporation tank, a pH adjustment tank and a sedimentation tank, and directly concentrates and recycles the high-concentration water washing after chemical throwing through the evaporation tank, so that the waste water becomes a waste tank liquid, and the recovered waste tank liquid can be further processed and utilized, thereby realizing the recycling of resources; in the subsequent process of neutralizing the evaporated waste tank liquid with liquid alkali, compared with directly neutralizing the phosphorus-containing waste water, less liquid alkali is required, thus saving costs, and the amount of sludge generated accordingly is also reduced, thus reducing the cost of treating the sludge, thereby effectively reducing the cost of treating the phosphorus-containing waste water and saving resources;

[0011] The design of two sedimentation tanks can improve the sedimentation effect of sludge in wastewater, thereby reducing pollution to the environment. By arranging guide paddles and filter presses at the bottom of the sedimentation tanks, the continuously arranged guide paddles can automatically discharge the sludge at the bottom of the sedimentation tanks and directly process it through the filter press, which can effectively save the time and cost of sludge treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the pH adjustment tank of the utility model;

[0014] Figure 3 This is a schematic diagram of the sedimentation tank structure of the utility model;

[0015] Figure 4 It is a schematic diagram of the structure of the fine filter tank of the utility model.

[0016] In the figure: 1. Wastewater tank; 2. Evaporation tank; 3. pH adjustment tank; 31. Crossbeam; 32. Stirring motor; 33. Stirring paddle; 34. pH meter; 35. Liquid alkali storage tank; 4. Sedimentation tank; 41. Sedimentation tank one; 42. Sedimentation tank two; 43. Guide paddle; 44. Drive motor; 45. Sprocket assembly; 5. Fine filter tank; 51. Drain pipe; 6. Steam compressor; 7. Wastewater pipe; 8. Waste tank liquid pipe; 9. Extraction pipe one; 10. Extraction pipe two; 11. Neutralization liquid pipe; 12. Pump; 13. Check valve; 14. Filter press. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] See also Figure 1-4 The utility model provides a technical solution for a phosphorus-containing wastewater recovery and treatment device, the cost is: Example

[0019] according to Figure 1 As shown, it includes a wastewater pool 1, an evaporation pool 2, a pH adjustment pool 3, a sedimentation pool 4 and a fine filter pool 5 which are sequentially connected in series through a conduit, the outlet of the wastewater pool 1 and the inlet of the evaporation pool 2 are connected through a wastewater pipe 7, the outlet of the evaporation pool 2 and the inlet of the pH adjustment pool 3 are connected through a waste tank liquid pipe 8, the outlet of the pH adjustment pool 3 and the inlet of the sedimentation pool 4 are connected through a neutralizing liquid pipe 11, the clear liquid layer of the sedimentation pool 4 is connected to the inlet of the fine filter pool 5 through a liquid extraction pipe 10, the outlet of the fine filter pool 5 is connected to a drain pipe 51, the water inlet of the wastewater pool 1 is connected to a water inlet pipe, and the outlet of the wastewater pool 1 is connected to a water inlet pipe. A pump 12 and a one-way valve 13 are installed on pipe 7, waste tank liquid pipe 8, neutralization liquid pipe 11 and liquid extraction pipe respectively. After the phosphorus-containing wastewater enters the wastewater pool 1 from the water inlet pipe and is treated and purified in each treatment pool before being discharged, the phosphorus-containing wastewater enters the evaporation pool 2, and the wastewater after chemical throwing evaporates water through high temperature. The phosphorus content in the condensed water after evaporation is very low, so that the phosphorus-containing wastewater is concentrated into waste tank liquid and collected. Here, taking 2.5 cubic meters of water washing after chemical throwing as an example, the volume of the concentrated liquid is 1.4 cubic meters when the concentrated acid specific gravity reaches 1.73, and the pH value of the waste tank liquid is <1 at this time.

[0020] like Figure 2As shown, a crossbeam 31 is fixed on the inner top of the pH adjustment tank 3, and a liquid alkali storage tank 35 is fixed on the crossbeam 31. The liquid alkali stored in the liquid alkali storage tank 35 can be added into the pH adjustment tank 3 to react with the waste tank liquid for chemical neutralization to increase the pH value of the waste tank liquid. A pH meter 34 is installed in the pH adjustment tank 3. The pH value in the pH adjustment tank 3 is observed by the pH meter 34 to adjust the waste tank liquid to a suitable pH value. According to the test, when 50 ml of waste tank liquid is added with liquid alkali in small amounts and multiple times to adjust the pH to the range of 6-7, 100 ml of liquid alkali is consumed. When the waste tank liquid is adjusted to the range of 6-7 by liquid alkali, the relationship between the consumption of liquid alkali in the neutralization process is about: when the pH is 6.5, the volume ratio of acid and alkali solution is 1:2. Compared with the direct neutralization of phosphorus-containing wastewater, the amount of liquid alkali required for neutralization of the concentrated liquid after evaporation is less, which can save a lot of liquid alkali, and the corresponding amount of sludge generated will also be reduced, thereby reducing the treatment cost of sludge.

[0021] according to Figure 3 As shown, the sedimentation tank 4 is divided into a clear liquid layer and a sedimentation layer from top to bottom. The sedimentation tank 4 can be set up into two, including a sedimentation tank 1 41 and a sedimentation tank 2 42. The sedimentation tank 1 41 and the sedimentation tank 2 42 are arranged opposite to each other, and the clear liquid layers of the sedimentation tank 1 41 and the sedimentation tank 2 42 are connected by a liquid extraction pipe 1 9, and a water pump is installed on the liquid extraction pipe. By setting up two sedimentation tanks 4, the waste tank liquid can be secondary precipitated to improve the sedimentation treatment effect of the mud in the waste tank liquid. A plurality of guide paddles 43 are horizontally arranged and rotatably mounted in the sedimentation layer at the bottom of the sedimentation tank 4, and the plurality of guide paddles 43 are connected through a sprocket group 45 for transmission, and a driving motor 44 for controlling the rotation of the sprocket group 45 is installed on the sedimentation tank 4. A filter press 14 is arranged on the side of the sedimentation tank 4, and a discharge slot is opened at the bottom of the sedimentation tank 4. The discharge slot is connected to the filter press 14. The waste tank liquid with adjusted pH value in pH adjusting tank 3 is transferred to sedimentation tank 4 for sedimentation. When sedimentation tank 4 is undergoing flocculation sedimentation, the discharge slot is closed by the baffle, and the precipitated sludge falls on the sedimentation layer, and the clean water stays in the clear liquid layer. In order to improve the sedimentation effect of sedimentation tank 4, flocculant can be added to sedimentation tank 4. After the sedimentation is completed, the pump 12 on the liquid extraction pipe is first driven to pump the water in the clear liquid layer in sedimentation tank 4 into fine filter tank 5, and then the driving motor 44 is started, and the guide paddle 43 is driven to rotate through the sprocket set 45, and the sludge at the bottom of the sedimentation layer is guided to the filter press 14 for filtration treatment through the guide paddle 43, so as to realize the direct treatment of the sludge. Finally, the water entering the fine filter tank 5 is discharged after filtration, and the fine filter tank 5 can adopt a membrane filter.

[0022] When used specifically, the utility model is a phosphorus-containing wastewater recovery and treatment device. The phosphorus-containing wastewater enters the wastewater pool 1 through the liquid inlet pipe, and is pumped to the evaporation pool 2 through the pump 12 of the wastewater pipe 7. The evaporation pool 2 evaporates the phosphorus-containing wastewater at high temperature to concentrate the phosphorus-containing wastewater into waste tank liquid. The waste tank liquid is then pumped to the pH adjustment pool 3 through the waste tank liquid pipe 8. In the pH adjustment pool 3, the waste tank liquid reacts with the liquid alkali to increase the pH value of the waste tank liquid. The neutralized waste tank liquid then enters the sedimentation pool through the neutralization liquid pipe 11. 4, and sequentially pass through sedimentation tank 1 41 and sedimentation tank 2 42 for secondary sedimentation. The clear liquid after sedimentation is pumped into fine filter tank 5 through the liquid extraction pipe for final fine filtration and discharge. Finally, the baffle at the discharge slot at the bottom of sedimentation tank 4 is opened, and the driving motor 44 is controlled to operate, and the guide paddles 43 are driven to rotate through the sprocket group 45. The mud at the bottom of sedimentation tank 4 is sent to the filter press 14 through the guiding effect of the guide paddles 43, and the mud is subjected to filter pressure treatment to complete the recovery and treatment of phosphorus-containing wastewater. Example

[0023] On the basis of the first embodiment, Figure 2 As shown, a stirring assembly is provided in the pH adjusting tank 3, including a stirring motor 32 installed on a crossbeam 31, and an output end of the stirring motor 32 is connected to a stirring paddle 33 rotatably mounted in the pH adjusting tank 3. When the pH value of the phosphorus-containing wastewater is adjusted by liquid alkali, the stirring paddle 33 can be controlled to rotate by the stirring motor 32 to fully mix and stir the liquid alkali and the wastewater, thereby improving the mixing reaction efficiency of the liquid alkali and the wastewater, and further improving the wastewater treatment speed. Example

[0024] On the basis of the first embodiment, the evaporation pool 2 can be connected to the steam compressor 6 through a steam pipe. The water vapor generated by the evaporation pool 2 when evaporating the phosphorus-containing wastewater can enter the steam compressor 6 through the steam pipe to realize energy recovery and resource saving.

[0025] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A phosphorus-containing wastewater recovery and treatment device, comprising a wastewater pool (1), wherein an inlet of the wastewater pool (1) is connected to a water inlet pipe, characterized in that: It also comprises an evaporation tank (2), a pH adjustment tank (3), a sedimentation tank (4) and a fine filter tank (5), wherein the wastewater tank (1), the evaporation tank (2), the pH adjustment tank (3), the sedimentation tank (4) and the fine filter tank (5) are connected in series via a conduit, and a pump (12) and a one-way valve (13) are installed on the conduit, a crossbeam (31) is provided on the top of the pH adjustment tank (3), a liquid alkali storage tank (35) is fixed on the crossbeam (31), a pH meter (34) and a stirring assembly are installed in the pH adjustment tank (3), and the sedimentation tank (4) The upper and lower parts are divided into a clear liquid layer and a sedimentation layer. A plurality of guide paddles (43) are horizontally arranged and rotatably mounted in the sedimentation layer at the bottom of the sedimentation tank (4). The plurality of guide paddles (43) are connected by a sprocket group (45) for transmission. A driving motor (44) for controlling the rotation of the sprocket group (45) is installed on the sedimentation tank (4). A filter press (14) is arranged on the side of the sedimentation tank (4). A discharge notch is provided at the bottom of the sedimentation tank (4). The discharge notch corresponds to the material inlet of the filter press (14), and a baffle is provided at the outlet of the discharge notch.

2. A phosphorus-containing wastewater recovery and treatment device according to claim 1, characterized in that: The outlet of the wastewater pool (1) and the inlet of the evaporation pool (2) are connected via a wastewater pipe (7), the outlet of the evaporation pool (2) and the inlet of the pH adjustment pool (3) are connected via a waste tank liquid pipe (8), the outlet of the pH adjustment pool (3) and the inlet of the sedimentation pool (4) are connected via a neutralizing liquid pipe (11), the clear liquid layer of the sedimentation pool (4) is connected to the inlet of the fine filter pool (5) via a second liquid extraction pipe (10), and the outlet of the fine filter pool (5) is connected to a drainage pipe (51).

3. The phosphorus-containing wastewater recovery and treatment device according to claim 1, characterized in that: Two sedimentation tanks (4) are provided, and the clear liquid layers of adjacent sedimentation tanks (4) are connected via a top liquid extraction pipe (9).

4. The phosphorus-containing wastewater recovery and treatment device according to claim 1, characterized in that: The stirring assembly comprises a stirring motor (32) mounted on a crossbeam (31), wherein an output end of the stirring motor (32) is connected to a stirring paddle (33) located in the pH adjustment tank (3).

5. The phosphorus-containing wastewater recovery and treatment device according to claim 1, characterized in that: The evaporation pool (2) is connected to a steam compressor (6) via a steam pipeline.

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