Multi-stage industrial wastewater treatment equipment and treatment method

Abstract

The present invention discloses a multi-stage industrial wastewater treatment equipment and treatment method, belonging to the technical field of wastewater treatment. The present invention comprises a filter tank, a funnel, a dosing tube and a treatment water tank, one end of the filter tank is connected to the top of the funnel, the dosing tube is connected to the bottom of the funnel, the water tank is connected to the end of the dosing tube away from the funnel, the end of the filter tank away from the funnel is connected to industrial wastewater, a first filter and a second filter are arranged on the filter tank, the first filter and the second filter filter wastewater alternately, a dosing mechanism is arranged on the dosing tube, the dosing mechanism comprises several syringes, the syringes add drugs to the dosing tube, the first filter and the second filter are alternately used to ensure complete filtration of industrial wastewater, and continuous filtration without truncation is achieved under the premise of ensuring filtration efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a multi-stage industrial wastewater treatment device and a treatment method. Background Art

[0002] Industrial wastewater treatment is a very important environmental protection task. Its purpose is to process the wastewater generated in the industrial process through a suitable treatment process so that it meets environmental emission standards or can be safely reused. The process of industrial wastewater treatment usually involves a variety of technologies and steps, including screening and filtration, pH adjustment, precipitation, biological treatment and subsequent secondary filtration. These steps are carried out in steps. Therefore, the treatment process for general industrial wastewater often adopts multi-stage treatment. The impurity particles in industrial wastewater are very small. During filtration, they are easy to adhere to the filter element and reduce the flow rate, resulting in a decrease in the filtration effect. Generally, it is necessary to shut down the machine for the staff to deeply clean the filter element before putting it back into use, which is very inconvenient to use. Summary of the invention

[0003] The object of the present invention is to provide a multi-stage industrial wastewater treatment equipment and a treatment method to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a multi-stage industrial wastewater treatment equipment includes a filter tank, a funnel, a dosing pipe and a treatment water tank, one end of the filter tank is connected to the top of the funnel, the dosing pipe is connected to the bottom of the funnel, the treatment water tank is connected to the end of the dosing pipe away from the funnel, the end of the filter tank away from the funnel is connected to industrial wastewater, a first filter and a second filter are arranged on the filter tank, the first filter and the second filter alternately filter the wastewater, a dosing mechanism is arranged on the dosing pipe, the dosing mechanism includes several syringes, and the syringes add drugs into the dosing pipe.

[0005] Furthermore, the first filter includes a filter plate and an extended bracket, the filter plate divides the filter trough, the filter plate is arranged at an angle, the extended bracket is connected to one side of the filter plate, the extended bracket passes through the bottom of the filter trough, the extended bracket is slidingly and sealingly connected to the filter trough, and a sliding shaft is installed on one side of the extended bracket located at the bottom of the filter trough. The first filter is blocked in the filter trough, and industrial waste water flows through the first filter in the filter trough. The filter plate in the first filter performs preliminary filtration on the industrial waste water and intercepts impurities in the industrial waste water. After a period of filtration, more and more impurities adhere to the first filter, causing the filtration efficiency to decrease.

[0006] Furthermore, the first filter comprises a scraper shovel, one end of which is rotatably connected to the filter tank, the other end of which is placed on the filter tank through a shelf, one end of which is in contact with the filter plate, a discharge port is provided on the side of the scraper shovel away from the shelf, and round bosses are provided on the two side surfaces of the scraper shovel close to one end of the shelf, the control system drives the multi-stage push cylinder to operate, the cylinder rod of the multi-stage push cylinder is retracted into the cylinder body, the cylinder rod pulls the adjusting slider to move, the slide groove in the adjusting slider pushes the slide shaft of the second filter downward, the slide shaft of the first filter slides in the slide groove, the first filter does not move, and the slide shaft in the second filter places the filter plate into the filter tank through the extension bracket;

[0007] After the second filter is blocked in the filter slot, the adjusting slider uses the slide groove to push the slide shaft in the first filter upward, the filter plate in the first filter is pushed out of the filter slot, the slide shaft in the second filter slides in the slide groove, and the second filter does not move. After the adjusting slider moves, the second filter replaces the first filter to work.

[0008] Furthermore, filter side plates are provided on both sides of the contact surface between the filter plate and the scraper shovel, and elastic strips are provided on one side of the two filter side plates close to the scraper shovel, and the end of the elastic strip close to the top of the filter plate is bent in the direction close to the extension bracket. In the process of the first filter moving upward out of the filter tank, the elastic strip uses the circular boss to lift the scraper shovel upward through the inclined surface, and the circular boss slides along the upper part of the elastic strip so that the scraper shovel does not contact the surface of the filter plate. After the filter plate rises to the end, the circular boss is not blocked by the elastic strip, and the scraper shovel falls on the shelf due to gravity, and the scraper shovel contacts the surface of the filter plate again.

[0009] Furthermore, the structures and installation methods of the first filter and the second filter are the same. A multi-stage push cylinder and an adjusting slider are installed at the bottom of the filter tank. The adjusting slider is slidably installed with the bottom of the filter tank. Two obtuse-angled slide grooves are symmetrically opened on the adjusting slider. The two sliding shafts are slidably set in the two slide grooves respectively. The multi-stage push cylinder is connected to one end of the adjusting slider. After a period of filtration, more and more impurities are attached to the second filter. The control system drives the multi-stage push cylinder to run in reverse, so that the first filter is lowered into the filter tank and the second filter is lifted out of the filter tank. When the first filter and the second filter are alternating, one of the filters will always be lowered into the filter tank first, and the other filter will be lifted out of the filter tank, ensuring complete filtration of industrial wastewater and achieving continuous filtration without truncation under the premise of ensuring filtration efficiency.

[0010] During the process of the first filter being lowered back into the filter tank, the circular boss slides under the elastic strip, and the impurities on the filter plate are scraped off by the scraper. As the circular boss moves to the end of the elastic strip, the elastic strip has elasticity, and the circular boss passes over the elastic strip and returns to the top of it. Through the arrangement of the elastic strip and the circular boss, it is ensured that one end of the scraper is lifted up during the upward process of the filter plate, while the impurities on the surface of the filter plate can be scraped off during the downward process, thereby cleaning the filter plate and improving the filtering efficiency of the filter plate.

[0011] Furthermore, the dosing mechanism includes a water wheel chamber symmetrically arranged on both sides of the dosing pipe, and an impeller is rotatably installed in the water wheel chamber. A front gear and a rear gear are respectively arranged on both sides of each water wheel chamber, and the front gear and the rear gear are coaxially connected to the impeller, the two front gears are meshed with each other, and the two rear gears are meshed with each other. Round pins are arranged on the two front gears and the two rear gears, and a flat plate is connected to each round pin. The industrial wastewater flows into the dosing pipe after passing through the funnel, and the wastewater drives the two impellers to rotate through the gravitational potential energy. Since the front gears and the rear gears at both ends of the two impellers are in a meshing state, the two impellers are forced to maintain a motion state with the same speed and opposite directions. The round pins on the two front gears slide along the front slide rail while driving the front slide rail to reciprocate up and down. Similarly, the round pins on the two rear gears slide along the rear slide rail while driving the rear slide rail to reciprocate up and down.

[0012] Furthermore, the two round pins on the coaxially connected front gear and rear gear are set at 180 degrees, the front slide rails are slidably set on the round pins of the two front gears, and the rear slide rails are slidably set on the round pins of the two rear gears, and limiting columns are set on both sides of the front slide rails and the rear slide rails.

[0013] Furthermore, syringes are provided at both ends of the front slide rail and the rear slide rail, and the pistons of the four syringes are respectively connected to the four flat plates, and the four syringes are connected to drug extraction tubes and drug squeezing tubes. A one-way valve is provided at the connection between the syringe and the drug extraction tube and the drug squeezing tube. One end of the drug extraction tube is connected to the medicine supply end, and one end of the drug squeezing tube is connected to an end of the drug adding tube close to the funnel. When the flat plate enables the syringe on the front slide rail to extract the medicine, the flat plate on the other side enables the syringe on the rear slide rail to squeeze the medicine into the drug adding tube. Therefore, in the process of continuous rotation of the impeller, the working states of the syringe on the front slide rail and the syringe on the rear slide rail are opposite, and there is always a syringe on one side adding medicine to the drug adding tube, so that the drug adding process will not be interrupted. When the industrial wastewater with medicine flows through the impeller, it not only provides power to drive the impeller to rotate, but also makes the medicine mixed with the industrial wastewater more evenly under turbulence, thereby realizing the functions of automatic drug adding and energy saving.

[0014] A treatment method of a multi-stage industrial wastewater treatment device comprises the following steps:

[0015] S1: Industrial wastewater is filtered alternately by the first filter and the second filter in the filter tank;

[0016] S2: The multi-stage push cylinder pushes the adjusting slider to move, and the adjusting slider moves the filter plates in the first filter and the second filter, and the scraper scrapes the stains on the filter plates;

[0017] S3: The filtered industrial wastewater enters the dosing tube through the funnel. The weight potential energy of the wastewater drives the dosing mechanism to move, and the dosing mechanism automatically adds neutralizing agent to the industrial wastewater;

[0018] S4: The wastewater with chemicals is mixed by the impeller and flows into the treatment water tank.

[0019] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0020] 1. When the first filter and the second filter are alternating, one of the filters will always be lowered into the filter tank first, and the other filter will rise out of the filter tank, ensuring the complete filtration of industrial wastewater and achieving continuous filtration without interruption while ensuring the filtration efficiency.

[0021] 2. The working conditions of the syringe on the front slide rail and the syringe on the rear slide rail are opposite. There is always a syringe on one side adding medicine to the dosing tube, so that the dosing process will not be interrupted. When the industrial wastewater with medicine flows through the impeller, it not only provides the power to drive the impeller to rotate, but also makes the medicine mixed with the industrial wastewater more evenly under the turbulence, realizing the function of automatic dosing and energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 The overall appearance structure of the present invention is schematically shown Figure 1 ;

[0024] Figure 2 The overall appearance structure of the present invention is schematically shown Figure 2 ;

[0025] Figure 3 It is a schematic diagram of the appearance of the filter tank part of the present invention;

[0026] Figure 4 The present invention Figure 3 A partial enlarged schematic diagram of the middle A area;

[0027] Figure 5 It is a schematic diagram of the internal structure of the filter tank part of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the filter plate part of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the dosing tube part of the present invention. Figure 1 ;

[0030] Figure 8 This is a schematic diagram of the structure of the dosing tube part of the present invention. Figure 2 ;

[0031] In the figure: 1. filter tank; 2. funnel; 3. dosing pipe; 4. treatment water tank; 5. first filter; 6. second filter; 7. adjusting slider; 8. multi-stage push cylinder; 9. filter plate; 10. extension bracket; 11. sliding shaft; 12. filter side plate; 13. elastic strip; 14. scraper; 15. shelf; 16. discharge port; 18. round boss; 19. water wheel chamber; 20. impeller; 23. front gear; 24. rear gear; 25. front slide rail; 26. rear slide rail; 27. limit column; 28. flat plate; 29. ​​syringe barrel. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-Figure 8 The present invention provides a technical solution: a multi-stage industrial wastewater treatment equipment includes a filter tank 1, a funnel 2, a dosing pipe 3 and a treatment water tank 4, one end of the filter tank 1 is connected to the top of the funnel 2, the dosing pipe 3 is connected to the bottom of the funnel 2, the treatment water tank 4 is connected to the end of the dosing pipe 3 away from the funnel 2, the end of the filter tank 1 away from the funnel 2 is connected to industrial wastewater, the filter tank 1 is provided with a first filter 5 and a second filter 6, the first filter 5 and the second filter 6 alternately filter the wastewater, the dosing pipe 3 is provided with a dosing mechanism, the dosing mechanism includes a plurality of syringes 29, and the syringes 29 add drugs to the dosing pipe 3.

[0034] The first filter 5 includes a filter plate 9 and an extension bracket 10. The filter plate 9 divides the filter tank 1. The filter plate 9 is tilted. The extension bracket 10 is connected to one side of the filter plate 9. The extension bracket 10 passes through the bottom of the filter tank 1. The extension bracket 10 is slidably and sealedly connected to the filter tank 1. A sliding shaft 11 is installed on one side of the extension bracket 10 located at the bottom of the filter tank 1. The first filter 5 includes a scraper 14. One end of the scraper 14 is rotatably connected to the filter tank 1. The other end of the scraper 14 is placed on the filter tank 1 through a shelf 15. The scraper One end of 14 is in contact with the filter plate 9, a discharge port 16 is provided on the side of the scraper 14 away from the shelf 15, and round bosses 18 are provided on the two side surfaces of the scraper 14 close to the shelf 15. The first filter 5 is blocked in the filter tank 1, and the industrial waste water flows through the first filter 5 in the filter tank 1. The filter plate 9 in the first filter 5 performs preliminary filtration on the industrial waste water and intercepts impurities in the industrial waste water. After a period of filtration, more and more impurities adhere to the first filter 5, resulting in a decrease in filtration efficiency.

[0035] The control system drives the multi-stage push cylinder 8 to operate, the cylinder rod of the multi-stage push cylinder 8 retracts into the cylinder body, the cylinder rod pulls the adjusting slide block 7 to move, the slide groove in the adjusting slide block 7 pushes the slide shaft 11 of the second filter 6 downward, the slide shaft 11 of the first filter 5 slides in the slide groove, the first filter 5 does not move, the slide shaft 11 in the second filter 6 places the filter plate 9 in the filter tank 1 through the extension bracket 10, after the second filter 6 is blocked in the filter tank 1, the adjusting slide block 7 uses the slide groove to push the slide shaft 11 in the first filter 5 upward, the filter plate 9 in the first filter 5 is pushed out of the filter tank 1, and the slide shaft 11 in the second filter 6 slides in the slide groove. The shaft 11 slides in the slide groove, and the second filter 6 does not move. After the adjustment slider 7 is moved, the second filter 6 replaces the first filter 5 to work. During the first filter 5 moves upward out of the filter tank 1, the elastic strip 13 uses the circular boss 18 through the inclined surface to lift the scraper 14 upward. The circular boss 18 slides along the upper part of the elastic strip 13, so that the scraper 14 does not contact the surface of the filter plate 9. After the filter plate 9 rises to the end, the circular boss 18 is not blocked by the elastic strip 13, and the scraper 14 falls on the shelf 15 due to gravity, and the scraper 14 contacts the surface of the filter plate 9 again.

[0036] Filter side plates 12 are provided on both sides of the contact surface between the filter plate 9 and the scraper 14. Elastic strips 13 are provided on the sides of the two filter side plates 12 close to the scraper 14. The end of the elastic strip 13 close to the top of the filter plate 9 is bent in the direction close to the extension bracket 10. The structure and installation method of the first filter 5 and the second filter 6 are the same. A multi-stage push cylinder 8 and an adjusting slider 7 are installed at the bottom of the filter tank 1. The adjusting slider 7 is slidably installed with the bottom of the filter tank 1. Two obtuse-angled slide grooves are symmetrically opened on the adjusting slider 7. Two sliding shafts 11 are slidably set in the two slide grooves respectively. The multi-stage push cylinder 8 is connected to one end of the adjusting slider 7. After a period of filtration, more and more impurities are attached to the second filter 6. The control system drives the multi-stage push cylinder 8 to run in reverse, so that the first filter 5 is lowered into the filter tank 1, and the second filter 6 is lifted out of the filter tank 1. When the first filter 5 and the second filter 6 are alternately operated, one of the filters will always be lowered into the filter tank 1 first, and the other filter will be raised out of the filter tank 1, to ensure complete filtration of the industrial wastewater and to achieve continuous filtration without interruption while ensuring filtration efficiency. During the process of the first filter 5 being lowered back into the filter tank 1, the circular boss 18 slides under the elastic strip 13, and impurities on the filter plate 9 are scraped off by the scraper 14. As the circular boss 18 moves to the end of the elastic strip 13, the elastic strip 13 is elastic, and the circular boss 18 passes over the elastic strip 13 and returns to the top of it. Through the arrangement of the elastic strip 13 and the circular boss 18, it is ensured that one end of the scraper 14 is lifted up during the upward movement of the filter plate 9, while the impurities on its surface can be scraped off during the downward movement of the filter plate 9, thereby cleaning the filter plate 9 and improving the filtration efficiency of the filter plate 9.

[0037] The dosing mechanism includes a water wheel chamber 19 symmetrically arranged on both sides of the dosing pipe 3, and an impeller 20 is rotatably installed in the water wheel chamber 19. A front gear 23 and a rear gear 24 are respectively arranged on both sides of each water wheel chamber 19. The front gear 23 and the rear gear 24 are coaxially connected to the impeller 20. The two front gears 23 are meshed with each other, and the two rear gears 24 are meshed with each other. Round pins are arranged on the two front gears 23 and the two rear gears 24, and each round pin is connected to a flat plate 28. The two round pins on the coaxially connected front gear 23 and the rear gear 24 are arranged at 180 degrees, and a front sliding plate 28 is slidably arranged on the round pins of the two front gears 23. Rail 25, a rear slide rail 26 is slidably set on the round pins of the two rear gears 24, limiting columns 27 are set on both sides of the front slide rail 25 and the rear slide rail 26, and injection cylinders 29 are set at both ends of the front slide rail 25 and the rear slide rail 26. The pistons of the four injection cylinders 29 are respectively connected to the four flat plates 28, and the four injection cylinders 29 are connected to the drug extraction tube (not shown in the figure) and the drug squeezing tube (not shown in the figure). A one-way valve (not shown in the figure) is set at the connection between the injection cylinder 29 and the drug extraction tube and the drug squeezing tube. One end of the drug extraction tube is connected to the medicine supply end, and one end of the drug squeezing tube is connected to the end of the drug adding tube 3 close to the funnel 2.

[0038] After passing through the funnel 2, the industrial wastewater flows into the dosing pipe 3. The wastewater drives the two impellers 20 to rotate by the gravity potential energy. Since the front gears 23 and the rear gears 24 at both ends of the two impellers 20 are in a meshing state, the two impellers 20 are forced to maintain the same speed and opposite direction of motion. The round pins on the two front gears 23 slide along the front slide rail 25 while driving the front slide rail 25 to reciprocate up and down. Similarly, the round pins on the two rear gears 24 slide along the rear slide rail 26 while driving the rear slide rail 26 to reciprocate up and down. When the flat plate 28 makes the syringe 2 on the front slide rail 25 When extracting medicine, the flat plate 28 on the other side causes the syringe 29 on the rear slide rail 26 to squeeze the medicine into the medicine-adding tube 3. Therefore, during the continuous rotation of the impeller 20, the working states of the syringe 29 on the front slide rail 25 and the syringe 29 on the rear slide rail 26 are opposite, and there is always a syringe 29 on one side adding medicine into the medicine-adding tube 3, so that the medicine-adding process will not be interrupted. When the industrial wastewater added with medicine flows through the impeller 20, it not only provides the power to drive the impeller 20 to rotate, but also makes the medicine mixed with the industrial wastewater more evenly under the turbulence, thereby realizing the functions of automatic medicine-adding and energy saving.

[0039] A treatment method of a multi-stage industrial wastewater treatment device comprises the following steps:

[0040] S1: Industrial wastewater is filtered alternately by the first filter 5 and the second filter 6 in the filter tank 1;

[0041] S2: The multi-stage push cylinder 8 pushes the adjusting slider 7 to move, and the adjusting slider 7 moves the filter plates 9 in the first filter 5 and the second filter 6, and the scraper 14 scrapes the dirt on the filter plates 9;

[0042] S3: The filtered industrial wastewater enters the dosing tube 3 through the funnel 2, and the weight potential energy of the wastewater drives the dosing mechanism to move, and the dosing mechanism automatically adds a neutralizing agent to the industrial wastewater;

[0043] S4: The wastewater with the added chemicals flows into the treatment water tank 4 after being mixed by the impeller 20 .

[0044] The working principle of the present invention is as follows: the first filter 5 is blocked in the filter tank 1, and the industrial waste water flows through the first filter 5 in the filter tank 1. The filter plate 9 in the first filter 5 performs preliminary filtration on the industrial waste water and intercepts impurities in the industrial waste water. After a period of filtration, more and more impurities adhere to the first filter 5, causing the filtration efficiency to decrease.

[0045] The control system drives the multi-stage push cylinder 8 to operate, the cylinder rod of the multi-stage push cylinder 8 retracts into the cylinder body, the cylinder rod pulls the adjusting slide block 7 to move, the slide groove in the adjusting slide block 7 pushes the slide shaft 11 of the second filter 6 downward, the slide shaft 11 of the first filter 5 slides in the slide groove, the first filter 5 does not move, the slide shaft 11 in the second filter 6 places the filter plate 9 in the filter tank 1 through the extension bracket 10, after the second filter 6 is blocked in the filter tank 1, the adjusting slide block 7 uses the slide groove to push the slide shaft 11 in the first filter 5 upward, the filter plate 9 in the first filter 5 is pushed out of the filter tank 1, and the slide shaft 11 in the second filter 6 slides in the slide groove. The shaft 11 slides in the slide groove, and the second filter 6 does not move. After the adjustment slider 7 is moved, the second filter 6 replaces the first filter 5 to work. During the first filter 5 moves upward out of the filter tank 1, the elastic strip 13 uses the circular boss 18 through the inclined surface to lift the scraper 14 upward. The circular boss 18 slides along the upper part of the elastic strip 13, so that the scraper 14 does not contact the surface of the filter plate 9. After the filter plate 9 rises to the end, the circular boss 18 is not blocked by the elastic strip 13, and the scraper 14 falls on the shelf 15 due to gravity, and the scraper 14 contacts the surface of the filter plate 9 again.

[0046] After a period of filtration, more and more impurities are attached to the second filter 6. The control system drives the multi-stage push cylinder 8 to operate in the reverse direction, so that the first filter 5 is lowered into the filter tank 1 and the second filter 6 is lifted out of the filter tank 1. When the first filter 5 and the second filter 6 are alternately performed, one of the filters will always be lowered into the filter tank 1 first, and the other filter will be lifted out of the filter tank 1, ensuring complete filtration of the industrial wastewater, and achieving continuous filtration without interruption under the premise of ensuring filtration efficiency. In the process of the first filter 5 being lowered back into the filter tank 1, the circular boss 18 slides under the elastic strip 13, and the impurities on the filter plate 9 are scraped off by the scraper 14. As the circular boss 18 moves to the end of the elastic strip 13, the elastic strip 13 is elastic, and the circular boss 18 passes over the elastic strip 13 and returns to the top of it. Through the arrangement of the elastic strip 13 and the circular boss 18, it is ensured that one end of the scraper 14 is lifted up during the upward movement of the filter plate 9, and the filter plate 9 can scrape off the impurities on its surface during the downward movement, thereby cleaning the filter plate 9 and improving the filtration efficiency of the filter plate 9.

[0047] After passing through the funnel 2, the industrial wastewater flows into the dosing pipe 3. The wastewater drives the two impellers 20 to rotate by the gravity potential energy. Since the front gears 23 and the rear gears 24 at both ends of the two impellers 20 are in a meshing state, the two impellers 20 are forced to maintain the same speed and opposite direction of motion. The round pins on the two front gears 23 slide along the front slide rail 25 while driving the front slide rail 25 to reciprocate up and down. Similarly, the round pins on the two rear gears 24 slide along the rear slide rail 26 while driving the rear slide rail 26 to reciprocate up and down. When the flat plate 28 makes the syringe 2 on the front slide rail 25 When extracting medicine, the flat plate 28 on the other side causes the syringe 29 on the rear slide rail 26 to squeeze the medicine into the medicine-adding tube 3. Therefore, during the continuous rotation of the impeller 20, the working states of the syringe 29 on the front slide rail 25 and the syringe 29 on the rear slide rail 26 are opposite, and there is always a syringe 29 on one side adding medicine into the medicine-adding tube 3, so that the medicine-adding process will not be interrupted. When the industrial wastewater added with medicine flows through the impeller 20, it not only provides the power to drive the impeller 20 to rotate, but also makes the medicine mixed with the industrial wastewater more evenly under the turbulence, thereby realizing the functions of automatic medicine-adding and energy saving.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-stage industrial wastewater treatment equipment, characterized in that: The invention comprises a filter tank (1), a funnel (2), a dosing tube (3) and a treated water tank (4), wherein one end of the filter tank (1) is connected to the top of the funnel (2), the dosing tube (3) is connected to the bottom of the funnel (2), the treated water tank (4) is connected to the end of the dosing tube (3) away from the funnel (2), the end of the filter tank (1) away from the funnel (2) is connected to industrial waste water, a first filter (5) and a second filter (6) are arranged on the filter tank (1), the first filter (5) and the second filter (6) filter waste water alternately, and a dosing mechanism is arranged on the dosing tube (3), the dosing mechanism comprises a plurality of syringes (29), and the syringes (29) add drugs into the dosing tube (3); The first filter (5) comprises a filter plate (9) and an extension bracket (10), wherein the filter plate (9) divides the filter tank (1), the filter plate (9) is arranged at an angle, the extension bracket (10) is connected to one side of the filter plate (9), the extension bracket (10) passes through the bottom of the filter tank (1), the extension bracket (10) is connected to the filter tank (1) in a sliding and sealing manner, and a sliding shaft (11) is installed on one side of the extension bracket (10) located at the bottom of the filter tank (1); The first filter (5) comprises a scraper (14), one end of the scraper (14) being rotatably connected to the filter tank (1), the other end of the scraper (14) being placed on the filter tank (1) via a shelf (15), one end of the scraper (14) being in contact with the filter plate (9), a discharge port (16) being provided on a side of the scraper (14) away from the shelf (15), and round bosses (18) being provided on both side surfaces of the scraper (14) at one end close to the shelf (15); Filter side plates (12) are provided on both sides of the contact surface between the filter plate (9) and the scraper (14); elastic strips (13) are provided on the sides of the two filter side plates (12) close to the scraper (14); and the elastic strips (13) are bent toward the extension bracket (10) at one end close to the top of the filter plate (9); The first filter (5) and the second filter (6) have the same structure and installation method. A multi-stage push cylinder (8) and an adjusting slider (7) are installed at the bottom of the filter tank (1). The adjusting slider (7) is slidably installed at the bottom of the filter tank (1). Two obtuse-angled slide grooves are symmetrically opened on the adjusting slider (7). The two sliding shafts (11) are slidably arranged in the two slide grooves respectively. The multi-stage push cylinder (8) is connected to one end of the adjusting slider (7).

2. A multi-stage industrial wastewater treatment equipment according to claim 1, characterized in that: The dosing mechanism comprises water wheel chambers (19) symmetrically arranged on both sides of the dosing pipe (3), wherein an impeller (20) is rotatably mounted in the water wheel chambers (19), and a front gear (23) and a rear gear (24) are respectively arranged on both sides of each water wheel chamber (19), wherein the front gear (23) and the rear gear (24) are both coaxially connected to the impeller (20), the two front gears (23) are meshed with each other, and the two rear gears (24) are meshed with each other, and the two front gears (23) and the two rear gears (24) are both provided with round pins, and each round pin is connected to a plate (28).

3. A multi-stage industrial wastewater treatment equipment according to claim 2, characterized in that: Two round pins on the coaxially connected front gear (23) and rear gear (24) are arranged at 180 degrees, a front slide rail (25) is slidably arranged on the round pins of the two front gears (23), and a rear slide rail (26) is slidably arranged on the round pins of the two rear gears (24), and limiting columns (27) are arranged on both sides of the front slide rail (25) and the rear slide rail (26).

4. A multi-stage industrial wastewater treatment equipment according to claim 3, characterized in that: Both ends of the front slide rail (25) and the rear slide rail (26) are provided with injection cylinders (29), the pistons of the four injection cylinders (29) are respectively connected to the four flat plates (28), the four injection cylinders (29) are connected to drug extraction tubes and drug squeezing tubes, and one-way valves are provided at the connection between the injection cylinder (29) and the drug extraction tube and the drug squeezing tube. One end of the drug extraction tube is connected to the medicine supply end, and one end of the drug squeezing tube is connected to one end of the drug adding tube (3) close to the funnel (2).

5. A treatment method for a multi-stage industrial wastewater treatment equipment according to any one of claims 1 to 4, characterized in that: The steps include: S1: Industrial wastewater is filtered alternately by a first filter (5) and a second filter (6) in a filter tank (1); S2: the multi-stage push cylinder (8) pushes the adjustment slider (7) to move, the adjustment slider (7) causes the filter plates (9) in the first filter (5) and the second filter (6) to move, and the scraper (14) scrapes away the dirt on the filter plates (9); S3: The filtered industrial wastewater enters the dosing tube (3) through the funnel (2), and the weight potential energy of the wastewater drives the dosing mechanism to move, and the dosing mechanism automatically adds a neutralizing agent to the industrial wastewater; S4: The wastewater with the added chemicals is mixed by the impeller (20) and then flows into the treatment water tank (4).

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