Wastewater treatment system for nylon production

Abstract

The utility model belongs to the technical field of wastewater treatment equipment, and particularly discloses a wastewater treatment system for nylon production, which is characterized in that a filter tank, an intermediate tank and an oxidation tank are sequentially communicated through connecting pipes, and the filter tank is internally divided into a coagulation cavity, an air floatation cavity, a separation cavity, a filter cavity and a buffer cavity from left to right in sequence; the upper end of the air floatation cavity is fixedly connected with a scraper conveyor, the bottom of the air floatation cavity is fixedly connected with a plurality of air outlet pipes, the interior of the separation cavity is fixedly connected with a U-shaped groove, the bottom of the separation cavity is fixedly connected with a water seepage pipe, and the interior of the U-shaped groove is rotatably connected with an auger conveyor; according to the utility model, water and waste residues can be separated at one time by arranging the filter tank in the separate cavities, so that the working procedures are reduced, the labor intensity of workers is reduced, and the treatment effect can be improved by connecting various devices.

Description

Technical Field

[0001] This utility model belongs to the technical field of wastewater treatment equipment, specifically a wastewater treatment system for nylon production. Background Technology

[0002] In the nylon production process, the high-temperature alkaline washing of waste nylon generates high-concentration cleaning wastewater. Direct discharge into the municipal sewage treatment system would create a huge impact load, especially since this process produces a large amount of scum. Existing wastewater treatment devices require multiple steps to separate the scum from the water, which is cumbersome and increases manual labor intensity. Therefore, there is a need to design a wastewater treatment system that can separate and filter the scum in a single step, achieving integrated processing and reducing manual labor intensity. Utility Model Content

[0003] To address the above technical problems, this utility model provides a wastewater treatment system that can perform separation and filtration in a single step and achieve integrated processing to reduce manual labor intensity, thereby solving the problems of complex procedures and high manual labor intensity in the separation of scum and water in existing wastewater treatment devices.

[0004] To solve the above technical problems, the technical solution of this utility model is as follows: a wastewater treatment system for nylon production, comprising a filter box, an intermediate tank, and an oxidation tank, wherein the filter box, intermediate tank, and oxidation tank are connected sequentially by connecting pipes; an air compressor is fixedly connected to the top of the filter box; the filter box is divided into a coagulation chamber, a flotation chamber, a separation chamber, a filtration chamber, and a buffer chamber from left to right; an agitator is rotatably connected to the coagulation chamber, and a feed inlet is opened at the top; a scraper conveyor is fixedly connected to the upper end of the flotation chamber, and several air outlet pipes are fixedly connected to the bottom; the separation chamber is fixedly connected to the air outlet pipes. The filter tank is fixedly connected to a U-shaped trough and a seepage pipe is fixedly connected to the bottom. A screw conveyor is rotatably connected inside the U-shaped trough. The output end of the seepage pipe extends outward through the side wall of the filter box. The intermediate pool is connected to the output end of the connecting pipe through a submersible pump. The oxidation tank is divided into an anaerobic pool, an aerobic pool, and a filtration pool from right to left. Elastic three-dimensional packing is vertically suspended in the anaerobic pool and the aerobic pool. Several filtration mechanisms are vertically arranged in the filtration pool. The stirring paddle is driven by a first motor, the scraper conveyor is driven by a second motor, and the screw conveyor is driven by a third motor.

[0005] Furthermore, the top of the coagulation chamber is connected to the flotation chamber, the flotation chamber is connected to the filtration chamber through a first strip-shaped filter hole, the top of the flotation chamber is connected to the separation chamber, and the filtration chamber is connected to the buffer chamber through a second strip-shaped filter hole. The second strip-shaped filter hole is located at the same level as the lower end face of the scraper conveyor.

[0006] Furthermore, the air compressor is connected to several outlet pipes via a horizontal air pipe, and several micro air outlet holes are provided on the outlet pipes.

[0007] Furthermore, both ends of the scraper conveyor are rotatably connected to the side wall of the filter box via rotating shafts, and one end of the scraper conveyor is located inside the separation chamber.

[0008] Furthermore, the filter box has an observation port in the middle of the top and a door on the side located at the separation chamber. The oxidation tank has an air inlet on the top and a water outlet pipe installed on the side near the filter pool.

[0009] This utility model has the following advantages compared with the prior art:

[0010] 1. This utility model connects the filter box, intermediate tank, and oxidation tank in a certain sequence to form a complete and automatic wastewater treatment device. It can complete the filtration and separation operations in one go, reducing the intensity of manual labor. By dividing the filter box into chambers at one time, the wastewater flows along a certain path, separating and filtering large particles of impurities from the water. By setting up an air compressor and an air outlet pipe, and opening a micro air outlet on the air outlet pipe, the input of gas can make the coagulated impurities float on the water surface, which is convenient for the separation of impurities from water.

[0011] 2. By setting up a U-shaped frame, water in the impurities can be further separated. By setting up an auger conveyor, the automation level of the device can be improved and the intensity of manual labor can be reduced. By setting up two different strip filter holes, multiple filtration can be performed to improve the shrinkage effect. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the filter box of this utility model from the right side.

[0014] In the diagram: 1. Filter box; 2. Coagulation chamber; 3. Flotation chamber; 4. Separation chamber; 5. Filter chamber; 6. Buffer chamber; 7. Intermediate tank; 8. Oxidation tank; 9. Elastic three-dimensional packing material; 10. Third motor; 11. Second motor; 12. Filtering mechanism; 13. Submersible pump; 14. Connecting pipe; 15. Drainage pipe; 16. U-shaped trough; 17. Screw conveyor; 18. Air outlet pipe; 19. Second strip filter hole; 20. Air compressor; 21. First motor; 22. Scraper conveyor; 23. First strip filter hole; 24. Agitator. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] like Figures 1 to 2 The wastewater treatment system for nylon production shown includes a filter box 1, an intermediate tank 7, and an oxidation tank 8. The filter box 1, intermediate tank 7, and oxidation tank 8 are connected sequentially by a connecting pipe 14. An air compressor 20 is fixedly connected to the top of the filter box 1. To enable multi-stage filtration of the wastewater, the filter box 1 is divided into a coagulation chamber 2, an air flotation chamber 3, a separation chamber 4, a filtration chamber 5, and a buffer chamber 6 from left to right. To increase the coagulation speed and ensure that the coagulant reacts fully and evenly with the wastewater, a stirring paddle 24 is rotatably connected in the coagulation chamber 2, and an inlet is opened at the top. This allows for the removal of impurities floating on the water surface. Separation is achieved by a scraper conveyor 22 fixedly connected to the upper end of the flotation chamber 3. Two rollers at both ends of the scraper conveyor 22 are rotatably connected to the side wall of the filter box 1, and the two rollers are connected by a chain drive. Scrapers are evenly spaced on the chain, allowing the lowest point of the scrapers to extend below the surface of the wastewater for agitation. To ensure that the coagulated impurities continue to float on the water surface and do not sink, several air outlet pipes 18 are fixedly connected to the bottom of the flotation chamber 3. The air outlet pipes 18 are evenly arranged longitudinally, and micro-air outlet holes are formed on the upper surface of the air outlet pipes 18. The gas ejected through the micro-air outlet holes adheres to the coagulated impurities, causing them to... The impurities can float on the water surface and are separated by a scraper conveyor 22. To separate the residual water in the coagulated impurities, a U-shaped trough 16 is fixedly connected inside the separation chamber 4, and a seepage pipe 15 is fixedly connected to the bottom. The bottom wall of the U-shaped trough 16 has a mesh structure, and water falls through the bottom wall of the U-shaped trough 16 to the bottom of the separation chamber 4. To remove the impurities and reduce manual labor, an auger conveyor 17 is rotatably connected inside the U-shaped trough 16. The output end of the seepage pipe 15 extends outward through the side wall of the filter box 1. The intermediate pool 7 is connected to the output end of the connecting pipe 14 via a submersible pump 13. The model of the submersible pump is determined according to... The actual situation can be chosen by the user. This is an existing technology and will not be elaborated further. In order to chemically treat the wastewater, the oxidation tank 8 is divided into an anaerobic tank, an aerobic tank, and a filtration tank from right to left. Wastewater is transferred between them by a water pump. In order to better carry out chemical treatment, elastic three-dimensional packing material 9 is vertically suspended in the anaerobic tank and the aerobic tank. Several filtration mechanisms 12 are vertically installed in the filtration tank. The filtration mechanism 12 is set as an MBR membrane system. The stirring paddle 24 is driven by the first motor 21, the scraper conveyor 22 is driven by the second motor 11, and the auger conveyor 17 is driven by the third motor 10.

[0017] To ensure the suspension rises, the water is filtered from the bottom. Based on the principle of communicating vessels, a channel is set for the water supply. A vertically upward baffle is installed between the coagulation chamber 2 and the flotation chamber 3, with the top of the baffle connected. The flotation chamber 3 and the filtration chamber 5 are connected through a first strip-shaped filter hole 23, which contains a filter screen. The top of the flotation chamber 3 is connected to the separation chamber 4. The filtration chamber 5 and the buffer chamber 6 are connected through a second strip-shaped filter hole 19, which has a smaller aperture than the filter screen in the first strip-shaped filter hole 23. To ensure the horizontal plane is at a certain position, the second strip-shaped filter hole 19 is positioned at the same level as the lower end face of the scraper conveyor 22.

[0018] In order to introduce air bubbles into the filter box 1, the air compressor 20 is connected to several air outlet pipes 18 through a horizontal air pipe, and several micro air outlet holes are opened on the air outlet pipes 18.

[0019] In order for the scraper conveyor 22 to carry the coagulated impurities into the U-shaped trough 16, both ends of the scraper conveyor 22 are rotatably connected to the side wall of the filter box 1 through rotating shafts, and one end of the scraper conveyor 22 is located in the separation chamber 4.

[0020] To facilitate observation, an observation port is provided in the middle of the top of the filter box 1, and a box door is provided on the side at the separation chamber 4. An air inlet is provided on the top of the oxidation tank 8, and a water outlet pipe is installed on the side near the filter pool.

[0021] The specific working process of this utility model is as follows:

[0022] When wastewater treatment is required, wastewater needs to be continuously fed into the coagulation chamber 2. After adding a certain amount of coagulant, the first motor 21 is turned on to drive the agitator 24 to rotate. Once the wastewater fills the coagulation chamber 2, it flows from the top into the flotation chamber 3. Wastewater is then continuously added, along with a measured amount of coagulant. When the wastewater with added coagulant enters the flotation chamber 3, air is introduced into the flotation chamber 3 through the air compressor 20 via the air outlet pipe 18. Microbubbles adhere to the coagulated impurities and float on the water surface. At this time, the second motor 11 is turned on to drive the scraper conveyor 22 to rotate. The scraper conveys the coagulated impurities floating on the water surface to the U-shaped trough 16. The residual water in the coagulated impurities flows from the bottom of the U-shaped trough 16 to the separation chamber. 4. At the bottom, the water flows through the first strip filter hole 23 into the filter chamber 5, then through the second strip filter hole 19 into the buffer chamber 6, and finally into the intermediate tank 7. After sedimentation in the intermediate tank 7, the water in the intermediate tank 7 is pumped out by the submersible pump 13 and sent to the oxidation tank 8. After aerobic and anaerobic fermentation and chemical reaction, harmful microorganisms in the wastewater can be removed. Finally, after being filtered layer by layer by the filter mechanism 12, it is discharged from the outlet pipe. When the U-shaped tank 16 is full of a certain amount of impurities, the wastewater entry is stopped, and the box door is opened to start the screw conveyor 17 to send out the impurities. According to the above method, a complete wastewater filtration and separation treatment system can be formed, which can improve the treatment efficiency and reduce the intensity of manual labor.

Claims

1. A wastewater treatment system for nylon production, comprising a filter box (1), an intermediate tank (7), and an oxidation tank (8), wherein the filter box (1), the intermediate tank (7), and the oxidation tank (8) are connected sequentially via a connecting pipe (14), characterized in that: An air compressor (20) is fixedly connected to the top of the filter box (1). The filter box (1) is divided into a coagulation chamber (2), an air flotation chamber (3), a separation chamber (4), a filter chamber (5), and a buffer chamber (6) from left to right. An agitator (24) is rotatably connected to the coagulation chamber (2), and an inlet is opened at the top. A scraper conveyor (22) is fixedly connected to the upper end of the air flotation chamber (3), and several air outlet pipes (18) are fixedly connected to the bottom. A U-shaped trough (16) is fixedly connected to the separation chamber (4), and a seepage pipe (15) is fixedly connected to the bottom. An auger conveyor is rotatably connected to the U-shaped trough (16). 17), the output end of the seepage pipe (15) extends outward through the side wall of the filter box (1), the intermediate pool (7) is connected to the output end of the connecting pipe (14) through the submersible pump (13), the oxidation tank (8) is divided into an anaerobic pool, an aerobic pool and a filter pool from right to left, the anaerobic pool and the aerobic pool are vertically hung with elastic three-dimensional packing material (9), the filter pool is vertically arranged with several filter mechanisms (12), the stirring paddle (24) is driven by the first motor (21), the scraper conveyor (22) is driven by the second motor (11), and the auger conveyor (17) is driven by the third motor (10).

2. The nylon production wastewater treatment system according to claim 1, characterized in that: The coagulation chamber (2) is connected at the top to the flotation chamber (3), the flotation chamber (3) is connected to the filtration chamber (5) through a first strip filter hole (23), the flotation chamber (3) is connected at the top to the separation chamber (4), the filtration chamber (5) is connected to the buffer chamber (6) through a second strip filter hole (19), and the second strip filter hole (19) is set at the same level as the lower end face of the scraper conveyor (22).

3. The nylon production wastewater treatment system according to claim 1, characterized in that: The air compressor (20) is connected to several air outlet pipes (18) via a horizontal air pipe, and several micro air outlet holes are provided on the air outlet pipes (18).

4. The wastewater treatment system for nylon production according to claim 1, characterized in that: The scraper conveyor (22) is rotatably connected to the side wall of the filter box (1) at both ends by rotating shafts, and one end of the scraper conveyor (22) is located in the separation chamber (4).

5. The nylon production wastewater treatment system according to claim 1, characterized in that: The filter box (1) has an observation port in the middle of the top and a door on the side located at the separation chamber (4). The oxidation tank (8) has an air inlet on the top and a water outlet pipe installed on the side near the filter pool.

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