Alkaline reduction wastewater treatment method and device

Abstract

The application relates to the technical field of wastewater treatment, and particularly discloses an alkali-reduction wastewater multi-substance treatment method and device, which comprises a box body; a partition plate is fixedly connected to the inner side wall of the box body; the partition plate divides the internal space of the box body into a first cavity and a second cavity; the first cavity is located at the top of the partition plate; the second cavity is located at the bottom of the partition plate; a wastewater pipe is fixedly connected to the top surface of the box body; an electromagnetic valve is arranged on the wastewater pipe; a liquid medicine tank is arranged on the top surface of the box body; a dosing pipe is arranged at the bottom of the liquid medicine tank; a valve mechanism is arranged on the dosing pipe; the valve mechanism can control the amount of liquid medicine flowing into the first cavity; the wastewater and the liquid medicine are respectively introduced into the first cavity through the wastewater pipe and the dosing pipe; when the wastewater in the first cavity reaches a specified amount, the valve mechanism stops the dosing pipe from conveying the liquid medicine; the amount of the liquid medicine is controlled through the valve mechanism, so that the amount of the liquid medicine can be matched with the amount of the wastewater, and the inconvenience of manually adding the liquid medicine and the trouble of controlling the amount of the liquid medicine are reduced.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a method and apparatus for the differentiated treatment of wastewater by reducing alkali content. Background Technology

[0002] Alkali reduction process is one of the important methods to improve the performance of polyester fibers. The operation method involves hydrolyzing polyester fabric under high pressure, high temperature and high NaOH concentration. This process generates alkali reduction wastewater, which contains a large amount of sodium terephthalate, ethylene glycol, sodium hydroxide, dyes and auxiliaries. Therefore, alkali reduction wastewater needs to be treated. The usual treatment method is to add a treatment solution to the wastewater to neutralize the harmful substances in the wastewater and reduce its pollution.

[0003] In existing technologies, the addition of chemicals to wastewater is mostly done manually. This method of adding chemicals not only wastes a lot of manpower, but also makes it difficult to control the amount of chemicals added, thus affecting the treatment effect of the chemicals on the wastewater. Summary of the Invention

[0004] This application provides a method and apparatus for the differentiated treatment of alkali reduction wastewater, which automatically adds the chemical solution and controls the amount of chemical solution added, reducing the trouble of manual chemical addition.

[0005] This application provides a method and apparatus for the differentiated treatment of alkali reduction wastewater, which adopts the following technical solution:

[0006] An alkaline reduction wastewater treatment device includes a housing; a partition is fixedly connected to the inner wall of the housing; the partition divides the internal space of the housing into a first cavity and a second cavity; the first cavity is located at the top of the partition; the second cavity is located at the bottom of the partition; a wastewater pipe communicating with the interior of the first cavity is fixedly connected to the top surface of the housing; a solenoid valve is installed on the wastewater pipe; a chemical tank is installed on the top surface of the housing; a dosing pipe extending into the first cavity is installed at the bottom of the chemical tank; the dosing pipe connects the chemical tank and the first cavity; a valve mechanism is installed on the dosing pipe; the valve mechanism can control the amount of chemical solution flowing into the first cavity from the chemical tank.

[0007] By adopting the above technical solution, when treating wastewater, the wastewater is introduced into the first chamber through the wastewater pipe, and the chemical solution in the chemical tank is transported to the first chamber through the dosing pipe to react with the wastewater. When the chemical solution is transported through the dosing pipe, the amount of chemical solution is controlled by the valve mechanism set on the dosing pipe, so that the amount of chemical solution can match the wastewater, so that the chemical solution and wastewater can react better, and reduce the trouble of manually adding chemical solution and controlling the amount of chemical solution.

[0008] Preferably, the dosing tube has a pair of openings; the valve mechanism includes a valve plate, a push block, a straight rod, and a float; the valve plate is slidably connected to the inner sidewall of the pair of openings, and the valve plate passes through the dosing tube; the push block is fixed to the outer sidewall of one end of the valve plate, and the sidewall of the push block connected to the valve plate is connected to the outer wall of the dosing tube by a spring; the valve plate near the push block has a leakage port located outside the dosing tube; the push block away from the valve plate has a vertical part and an inclined part at the bottom of the vertical part; the straight rod is fixed to the top surface of the partition plate, and the straight rod is located on the side of the push block away from the valve plate; the float is sleeved outside the straight rod, and the float slides with the straight rod, and an electric actuator is fixed to the top surface of the float through a connecting rod; the output end of the electric actuator is fixed to a round rod that can contact and cooperate with the inclined part; a notch is provided on the vertical part; the round rod can be inserted into the notch.

[0009] By adopting the above technical solution, the electric actuator is activated so that the round rod contacts the inclined part of the push block. As wastewater is continuously transported into the first chamber, the liquid level in the first chamber gradually rises, causing the float to drive the electric actuator to move upward. During the upward movement of the electric actuator, the round rod gradually slides up the inclined surface of the inclined part, causing the push block to compress the spring and drive the valve plate to slide, so that the leakage port on the valve plate gradually enters the dosing pipe, and the dosing pipe begins to gradually deliver the liquid. When the round rod slides to the vertical part, the leakage port is completely inside the dosing pipe, and the dosing pipe begins to deliver liquid stably. When the wastewater level reaches the specified value, the round rod moves up to the recess, and the push block, under the action of the spring force, drives the valve plate to slide back, causing the round rod to be locked in the recess. The valve plate closes the channel of the dosing pipe and stops the delivery of the liquid, thereby realizing the control of the liquid dosage so that the liquid dosage matches the wastewater.

[0010] Preferably, a first contact is provided on the outer wall of the output end of the electric actuator; a second contact is provided on the vertical part at the top of the first recess; the second contact can contact the first contact when the round rod is inserted into the recess; a power supply is provided on the housing; one pole of the power supply is electrically connected to the first contact, and the other pole of the power supply is electrically connected to one terminal of the solenoid valve; the other terminal of the solenoid valve is electrically connected to the second contact.

[0011] By adopting the above technical solution, when the round rod is inserted into the notch, the first contact and the second contact come into contact. At this time, the circuit between the power supply, the solenoid valve, the first contact and the second contact is connected, the solenoid valve is closed, and the wastewater is stopped from being transported, so that the amount of wastewater in the first cavity can match the amount of medicine to react.

[0012] Preferably, a rubber ring is fixed to the inner sidewall of each pair of openings; the inner wall of the rubber ring is in close contact with the outer wall of the valve plate.

[0013] By adopting the above technical solution, the rubber ring provides a good seal at the opening, reducing the possibility of leakage of the medicine from the gap between the inner wall of the opening and the valve plate.

[0014] Preferably, a motor is installed on the outer wall of the housing; a rotating shaft extending into the first cavity is coaxially fixed to the output end of the motor; and a stirring plate is fixed to the outer wall of the rotating shaft.

[0015] By adopting the above technical solution, during the mixing and reaction of the drug solution and wastewater, the motor is started to drive the rotating shaft to rotate, thereby causing the stirring plate to stir the drug solution and wastewater, promoting the drug solution and wastewater to react fully and produce precipitation.

[0016] Preferably, a connecting pipe connecting the first cavity and the second cavity is fixedly connected to the bottom surface of the partition; a first valve is provided on the connecting pipe; a filter plate is fixedly connected to the inner wall of the second cavity; a filter screen is provided on the filter plate; a drain pipe connecting the second cavity and the external environment is fixedly connected to the bottom surface of the box; a second valve is provided on the drain pipe.

[0017] By adopting the above technical solution, after the drug solution and wastewater have reacted fully in the first chamber, the first valve on the connecting pipe is opened to allow the water and impurities to enter the second chamber. The water and impurities are then filtered and separated by the filter screen set on the filter plate. Under the filtration effect of the filter screen, the impurities are blocked on the surface of the filter screen, and the water is discharged through the drain pipe after passing through the filter screen.

[0018] Preferably, the filter plate is provided with an annular groove surrounding the outer periphery of the filter screen; a reciprocating screw coaxial with the rotating shaft is rotatably connected to the inner wall of the second cavity; the reciprocating screw is located at the top of the filter screen, and a cleaning brush that is threadedly engaged with the reciprocating screw is sleeved on the outside of the reciprocating screw; the cleaning brush is slidably engaged with the inner wall of the second cavity, and the bristles of the cleaning brush are in contact with the top surface of the filter screen; one end of the reciprocating screw is provided with a transmission component that enables the rotating shaft to drive the reciprocating screw to rotate.

[0019] By adopting the above technical solution, the rotating shaft drives the reciprocating screw to rotate through the transmission component during rotation. During the rotation of the reciprocating screw, the cleaning brush slides back and forth and cleans the surface of the filter screen, causing impurities on the surface of the filter screen to be swept into the annular groove, reducing the possibility of the filter screen mesh being blocked by impurities and ensuring the filtration effect of the filter screen.

[0020] Preferably, the transmission assembly includes a first pulley, a second pulley, and a belt; the first pulley is coaxially fixed to the outer side wall of the end of the rotating shaft; the second pulley is coaxially fixed to the outer side wall of the end of the reciprocating lead screw; the belt is sleeved outside the first pulley and the second pulley, and the belt causes the first pulley and the second pulley to move together.

[0021] By adopting the above technical solution, the rotating shaft drives the reciprocating screw to rotate during the rotation of the rotating shaft through the coordinated operation of the first pulley, the second pulley and the belt, thereby realizing the transfer of kinetic energy during the rotation of the rotating shaft.

[0022] Preferably, a pump body is installed on the outer wall of the housing; the pump body input end is fixedly connected to a suction pipe extending into the annular groove, and the pump body output end is fixedly connected to a discharge pipe communicating with the external environment.

[0023] By adopting the above technical solution, when a lot of impurities accumulate in the annular groove, the pump body is started to suck up the impurities in the annular groove. The impurities in the annular groove are discharged from the annular groove through the suction pipe and the discharge pipe, thereby conveniently realizing the collection of impurities in the annular groove.

[0024] A method for treating alkali reduction wastewater in a differentiated manner, based on the aforementioned alkali reduction wastewater treatment device, includes the following steps:

[0025] S1: Wastewater and chemical solution are transported to the first chamber of the tank through the wastewater pipe and the chemical dosing pipe respectively for reaction, and the amount of chemical solution transported is controlled by the valve mechanism set on the chemical dosing pipe;

[0026] S2: Start the motor to drive the stirring plate to rotate, so that the wastewater and the medicine solution can react fully in the first chamber;

[0027] S3: The wastewater and the chemical solution react and the resulting liquid is transported to the second chamber through a connecting pipe. The filter screen on the filter plate filters out the sediment and impurities in the liquid. The liquid with the sediment and impurities removed is then discharged to the outside of the tank through a drain pipe, thus achieving wastewater treatment.

[0028] In summary, this application has the following beneficial effects:

[0029] 1. Wastewater is introduced into the first chamber through the wastewater pipe. The medicine in the medicine tank is transported to the first chamber through the dosing pipe to react with the wastewater. When the wastewater in the first chamber reaches the specified amount, the valve mechanism stops the dosing pipe from supplying the medicine. The valve mechanism controls the amount of medicine used, ensuring that the amount of medicine used matches the amount of wastewater, so that the medicine and wastewater can react better and reduce the trouble of manually adding medicine and controlling the amount of medicine.

[0030] 2. When the drug solution and wastewater react in the first chamber, the motor is started to drive the rotating shaft and stirring plate to rotate. The stirring plate stirs the drug solution and wastewater, promoting a full reaction between the drug solution and wastewater and increasing the mixing reaction rate of the drug solution and wastewater.

[0031] 3. When the motor drives the rotating shaft to rotate, the first pulley, the second pulley and the belt work together to drive the reciprocating screw to rotate, causing the cleaning brush to slide along the surface of the filter screen to clean the impurities on the filter screen and sweep the impurities into the annular groove, thereby reducing the possibility of the filter screen mesh being blocked and ensuring the filtration effect of the filter screen. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of an alkali reduction wastewater treatment device according to this application;

[0033] Figure 2 This is a schematic diagram of the internal structure of the box in this application;

[0034] Figure 3 This is a schematic diagram of the cooperation structure between the dosing pipe and the valve mechanism in this application;

[0035] Figure 4 This is a schematic diagram of the mating structure of the dosing tube, valve plate, and sealing ring in this application;

[0036] Figure 5 This is a schematic diagram of the assembly structure of the partition, connecting pipe and filter plate in this application;

[0037] Figure 6 This is a schematic diagram of the mating structure of the rotating shaft, transmission assembly, and reciprocating lead screw in this application.

[0038] Explanation of reference numerals in the attached drawings: 1. Box body; 11. Partition plate; 12. First cavity; 13. Second cavity; 14. Wastewater pipe; 141. Solenoid valve; 15. Connecting pipe; 16. Drain pipe; 2. Medicine tank; 21. Dosing pipe; 22. Opening; 221. Rubber ring; 3. Valve mechanism; 31. Valve plate; 311. Leakage port; 32. Push block; 321. Notch; 33. Straight rod; 34. Float; 35. Spring; 36. 37. Connecting rod; 38. Electric actuator; 4. Round rod; 5. First contact; 6. Second contact; 7. Power supply; 8. Motor; 9. Rotating shaft; 10. Stirring plate; 11. Reciprocating screw; 12. Cleaning brush; 13. Transmission assembly; 14. First pulley; 15. Second pulley; 16. Belt; 17. Filter plate; 18. Filter screen; 19. Annular groove; 20. Pump body; 21. Suction pipe; 22. Discharge pipe. Detailed Implementation

[0039] The present invention will be further described in detail below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," "lower," "bottom," and "top" used in the following description refer to directions in the drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0040] This invention discloses a wastewater treatment device for alkali reduction, such as... Figure 1 and Figure 2 As shown, the device includes a housing 1, a wastewater pipe 14, a medicine tank 2, and a valve mechanism 3. A partition 11 is fixed to the inner wall of the housing 1, dividing the internal space of the housing 1 into a first cavity 12 located at the top of the partition 11 and a second cavity 13 located at the bottom of the partition 11. The wastewater pipe 14 is fixed to the top surface of the housing 1 and communicates with the inside of the first cavity 12. A solenoid valve 141 is installed on the wastewater pipe 14. The medicine tank 2 is fixed to the top surface of the housing 1. A dosing pipe 21 extending into the housing 1 is fixed to the inner wall of the bottom end of the medicine tank 2. The dosing pipe 21 connects the medicine tank 2 and the first cavity 12. The valve mechanism 3 is located at the end of the dosing pipe 21 that extends into the first cavity 12. The valve mechanism 3 can control the amount of medicine flowing from the medicine tank 2 into the first cavity 12.

[0041] Wastewater is introduced into the first chamber 12 through wastewater pipe 14. The medicine in the medicine tank 2 is transported to the first chamber 12 through dosing pipe 21 to react with the wastewater. When the medicine is transported through dosing pipe 21, the amount of medicine is controlled by the valve mechanism 3 set on dosing pipe 21 so that the amount of medicine can match the amount of wastewater, reducing the trouble of manually adding medicine and controlling the amount of medicine.

[0042] like Figure 2 , Figure 3 and Figure 4 As shown, a pair of openings 22 are provided on the end side wall of the dosing tube 21 extending into the first cavity 12. The pair of openings 22 are located on the two side walls of the dosing tube 21 that are far apart from each other. Rubber rings 221 are fixed to the inner side walls of both openings 22. The valve mechanism 3 includes a valve plate 31, a push block 32, a straight rod 33, a float 34, and an electric push rod 37. The valve plate 31 is slidably connected to the inner side walls of the pair of openings 22. The valve plate 31 passes through the dosing tube 21, and the outer wall of the valve plate 31 is in close contact with the inner wall of the rubber rings 221. The push block 32 is fixed to the outer side wall of one end of the valve plate 31. A spring 35 is fixed to the side wall of the push block 32 connected to the valve plate 31. The end of the spring 35 away from the push block 32 is fixed to the outer wall of the dosing tube 21. The valve plate 31 is provided with The leakage port 311 is located outside the dosing tube 21. The leakage port 311 is located on the side of the valve plate 31 near the push block 32. The push block 32 is provided with an inclined part and a vertical part from bottom to top on the side away from the valve plate 31. The straight rod 33 is vertically fixed to the top surface of the partition plate 11. The straight rod 33 is located on the side of the push block 32 away from the valve plate 31. The straight rod 33 is a rectangular rod. The float 34 is sleeved on the outside of the straight rod 33. The float 34 slides with the outer wall of the straight rod 33. The top surface of the float 34 is vertically fixed to the connecting rod 36. The electric push rod 37 is horizontally fixed to the top of the connecting rod 36. The output end of the electric push rod 37 is fixed to a round rod 38 that can cooperate with the inclined part. The vertical part is also provided with a notch 321. The round rod 38 can be inserted into the notch 321.

[0043] After wastewater is introduced into the first chamber 12, the electric actuator 37 is activated, causing the round rod 38 to contact the inclined section. As the wastewater is continuously transported, the liquid level in the first chamber 12 gradually rises. The float 34 drives the electric actuator 37 to gradually move upward. During the upward movement of the electric actuator 37, the round rod 38 gradually slides up the inclined surface of the inclined section, causing the push block 32 to compress the spring 35 and drive the valve plate 31 to slide. The leakage port 311 on the valve plate 31 gradually enters the dosing pipe 21, and the dosing pipe 21 gradually begins to transport the medicine. When the round rod 38 slides to the vertical section, the leakage port 311 is completely inside the dosing pipe 21, and the dosing pipe 21 opens. The liquid delivery is initially stable. When the wastewater level reaches the specified value, the round rod 38 moves upward to the notch 321. Under the elastic force of the spring 35, the push block 32 drives the valve plate 31 to slide back, causing the round rod 38 to be locked in the notch 321. The valve plate 31 closes the channel of the dosing pipe 21, stopping the delivery of the liquid, thereby realizing the control of the liquid dosage so that the liquid dosage matches the wastewater volume. After the liquid in the first chamber 12 is discharged, the electric push rod 37 is activated to drive the round rod 38 out of the notch 321. Under the action of gravity, the float 34 falls back to the initial position so as to control the dosing pipe 21 to add liquid again to react with the wastewater.

[0044] like Figure 2 and Figure 3 As shown, a first contact 4 is vertically fixed to the outer wall of the output end of the electric actuator 37, and a second contact 41 located at the top of the first recess 321 is fixed to the vertical part. A power supply 42 is provided on the top surface of the housing 1. One pole of the power supply 42 is electrically connected to the first contact 4 through a first wire, and the other pole of the power supply 42 is electrically connected to one terminal of the solenoid valve 141 through a second wire. The other terminal of the solenoid valve 141 is electrically connected to the second contact 41 through a third wire. The second contact 41 can contact the first contact 4 to conduct the circuit when the round rod 38 is inserted into the recess 321, thereby closing the solenoid valve 141.

[0045] When the round rod 38 is inserted into the notch 321, the first contact 4 and the second contact 41 contact the circuit to make the solenoid valve 141 close the wastewater pipe 14 and stop the wastewater from being transported, so that the amount of wastewater in the first cavity 12 can match the amount of medicine added to the first cavity 12.

[0046] like Figure 2 and Figure 5 As shown, a connecting pipe 15 connecting the first cavity 12 and the second cavity 13 is fixedly connected to the bottom surface of the partition 11. A first valve is provided on the connecting pipe 15. A filter plate 6 is fixedly connected to the inner wall of the second cavity 13. A filter screen 61 located at the bottom of the connecting pipe 15 is provided on the filter plate 6. An annular groove 62 surrounding the filter screen 61 is also provided on the filter plate 6. A drain pipe 16 connecting the second cavity 13 and the external environment is fixedly connected to the bottom surface of the box 1. A second valve is provided on the drain pipe 16.

[0047] After the drug solution and wastewater have reacted sufficiently in the first chamber 12, the first valve is opened to allow the water and sediment in the first chamber 12 to enter the second chamber 13. The filter screen 61 on the filter plate 6 is used to filter the water and sediment. After the water passes through the filter screen 61, it is discharged to the outside of the box 1 through the drain pipe 16, while the sediment is blocked on the surface of the filter screen 61, thus achieving the separation of water and sediment.

[0048] like Figure 1 and Figure 2 As shown, a motor 5 is installed on the outer wall of the box 1. A rotating shaft 51 extending horizontally into the first cavity 12 is coaxially fixed to the output end of the motor 5. A set of stirring plates 52 is fixed to the outer wall of the rotating shaft 51.

[0049] When the drug solution and wastewater are mixed and reacted, the motor 5 is started to drive the rotating shaft 51 and the stirring plate 52 to rotate. The stirring plate 52 stirs the drug solution and wastewater, promoting the drug solution and wastewater to react fully and increasing the mixing reaction rate of the drug solution and wastewater.

[0050] like Figure 2 and Figure 6 As shown, a reciprocating screw 53, coaxial with the rotating shaft 51, is rotatably connected to the inner wall of the second cavity 13. The reciprocating screw 53 is located at the top of the filter plate 6. A cleaning brush 54, which is threadedly engaged with the reciprocating screw 53, is sleeved outside the reciprocating screw 53. The cleaning brush 54 is a hard-bristled brush and slides against the inner wall of the second cavity 13. The bristles of the cleaning brush 54 contact the top surface of the filter screen 61. The end of the rotating shaft 51 near the motor 5 extends to the outside of the housing 1, and the end of the reciprocating screw 53 near the motor 5 also extends to the outside of the housing 1. A transmission assembly 55 is provided at the end outside the housing 1, which enables the rotating shaft 51 to drive the reciprocating screw 53 to rotate. The transmission assembly 55 includes a first pulley 551, a second pulley 552 and a belt 553. The first pulley 551 is coaxially fixed to the outer side wall of the end of the rotating shaft 51 near the motor 5. The second pulley 552 is coaxially fixed to the outer side wall of the end of the reciprocating screw 53 near the motor 5. The belt 553 is tensioned and sleeved outside the first pulley 551 and the second pulley 552, and the belt 553 makes the first pulley 551 and the second pulley 552 move together.

[0051] The rotation of the rotating shaft 51, driven by the first pulley 551, the second pulley 552, and the belt 553, causes the reciprocating screw 53 to rotate. This causes the cleaning brush 54 to move along the reciprocating screw 53 and clean the impurities on the filter screen 61. This cleans the impurities on the surface of the filter screen 61 and collects them in the annular groove 62, reducing the possibility of the filter screen 61 being clogged by impurities, so that the filter screen 61 can perform filtering work better.

[0052] like Figure 1and Figure 2 As shown, a pair of pump bodies 7 are installed on the outer wall of the housing 1. The input end of each pump body 7 is fixedly connected to a suction pipe 71 extending into the annular groove 62, and the output end of the pump body 7 is fixedly connected to a discharge pipe 72 that communicates with the external environment.

[0053] After a large amount of sedimentary impurities accumulate in the annular groove 62, the pump body 7 is started to suck up the impurities. The impurities are discharged to the external environment through the suction pipe 71 and the discharge pipe 72, thereby facilitating the discharge of impurities and reducing the possibility of a large amount of sedimentary impurities accumulating in the annular groove 62.

[0054] A method for differentiated treatment of alkali reduction wastewater, comprising the following steps:

[0055] S1: Wastewater and chemical solution are transported to the first cavity 12 of the tank 1 through wastewater pipe 14 and chemical dosing pipe 21 respectively for reaction. When the wastewater reaches the specified amount, valve mechanism 3 closes chemical dosing pipe 21, chemical solution is stopped being transported, solenoid valve 141 is closed, and chemical solution is controlled by valve mechanism 3 so that the amount of chemical solution used matches the amount of wastewater.

[0056] S2: During the mixing and reaction of wastewater and pharmaceutical solution, the motor 5 is started to drive the rotating shaft 51 and the stirring plate 52 to rotate, so as to promote the full reaction of wastewater and pharmaceutical solution in the first chamber 12 and improve the reaction rate of pharmaceutical solution and wastewater.

[0057] S3: After the wastewater and the medicine solution have reacted fully, open the first valve on the connecting pipe 15. The water in the first chamber 12 enters the second chamber 13 through the connecting pipe 15. Then, the water is filtered through the filter screen 61 on the filter plate 6 to separate the sediment and impurities from the water. The water with the sediment and impurities removed is then discharged to the outside of the tank 1 through the drain pipe 16, thereby achieving the treatment of wastewater.

[0058] S4: Regularly clean the sediment and impurities in the annular groove 62. When cleaning the annular groove 62, start the pump body 7 to make the sediment and impurities in the annular groove 62 be discharged through the suction pipe 71 and the discharge pipe 72 to avoid the accumulation of too much sediment and impurities in the annular groove 62.

[0059] Working principle: When treating wastewater, wastewater is introduced into the first chamber 12 through wastewater pipe 14. The electric actuator 37 is activated, causing the round rod 38 to contact the inclined surface of the inclined section. As wastewater is continuously supplied to the first chamber 12, the liquid level gradually rises, causing the float 34 to move the electric actuator 37 upwards. During this upward movement, the round rod 38 slides upwards along the inclined surface of the inclined section. The coordinated action of the round rod 38 and the inclined section causes the push block 32 to compress the spring 35, which in turn causes the valve plate 31 to slide, allowing the leakage port 311 on the valve plate 31 to gradually enter the dosing pipe 21. The dosing pipe 21 then begins to gradually supply the chemical solution. When the round rod 38 slides to the vertical section, this... When the leakage port 311 is fully inserted into the dosing pipe 21, the dosing pipe 21 begins to deliver liquid stably. When the wastewater level reaches the specified value, the round rod 38 moves up to the recess 321. Under the elastic force of the spring 35, the push block 32 drives the valve plate 31 to slide back, causing the round rod 38 to be locked in the recess 321. The valve plate 31 closes the channel of the dosing pipe 21, stopping the delivery of the liquid, thereby realizing the control of the amount of liquid. At this time, the first contact 4 will contact the second contact 41, and the circuit between the power supply 42, the solenoid valve 141, the first contact 4 and the second contact 41 is connected. The solenoid valve 141 closes, and the wastewater is stopped from being delivered, so that the amount of wastewater in the first cavity 12 can match the amount of liquid to react.

[0060] During the mixing and reaction of the drug solution and wastewater, the motor 5 is started to drive the rotating shaft 51 and the stirring plate 52 to rotate. The stirring plate 52 stirs the drug solution and wastewater, promoting the drug solution and wastewater to react fully to produce precipitation. After the reaction is complete, the first valve and the second valve are opened. The water and precipitated impurities in the first chamber 12 enter the second chamber 13 through the connecting pipe 15. The filter screen 61 set on the filter plate 6 filters the water and precipitated impurities. The impurities are blocked on the surface of the filter screen 61, and the water passes through the filter screen 61 and is discharged through the drain pipe 16.

[0061] During the rotation of the rotating shaft 51, the reciprocating screw 53 is driven to rotate through the cooperation of the first pulley 551, the second pulley 552 and the belt 553, causing the cleaning brush 54 to slide along the surface of the filter screen 61 to clean the impurities on the filter screen 61 and sweep the impurities into the annular groove 62, reducing the possibility of the mesh of the filter screen 61 being blocked and ensuring the filtration effect of the filter screen 61. When a lot of impurities accumulate in the annular groove 62, the pump body 7 is started to suck the impurities out of the box 1, thereby conveniently realizing the collection of impurities in the annular groove 62.

[0062] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A wastewater treatment device for alkali reduction, characterized in that: Includes a housing (1); a partition (11) is fixedly connected to the inner wall of the housing (1); the partition (11) divides the internal space of the housing (1) into a first cavity (12) and a second cavity (13); the first cavity (12) is located at the top of the partition (11); the second cavity (13) is located at the bottom of the partition (11); a wastewater pipe (14) communicating with the inside of the first cavity (12) is fixedly connected to the top surface of the housing (1); the wastewater pipe ( 14) is equipped with a solenoid valve (141); a medicine tank (2) is provided on the top surface of the box (1); a dosing pipe (21) extending into the first cavity (12) is provided at the bottom of the medicine tank (2); the dosing pipe (21) connects the medicine tank (2) and the first cavity (12); a valve mechanism (3) is provided on the dosing pipe (21); the valve mechanism (3) can control the amount of medicine flowing from the medicine tank (2) into the first cavity (12); The dosing tube (21) is provided with a pair of openings (22); the valve mechanism (3) includes a valve plate (31), a push block (32), a straight rod (33), and a float (34); the valve plate (31) is slidably connected to the inner side wall of the pair of openings (22), and the valve plate (31) passes through the dosing tube (21); the push block (32) is fixed to the outer side wall of one end of the valve plate (31), and the push block (32) is connected to the side wall of the valve plate (31) by a spring (35) and connected to the outer wall of the dosing tube (21); the valve plate (31) near the push block (32) is provided with a leakage port (311) located outside the dosing tube (21); the push block (311) is provided with a pair of openings (22) on the dosing tube (21); the push block (311) is slidably connected to the inner side wall of the pair of openings (22), and the valve plate (31) passes through the dosing tube (21); the valve plate (31) is slidably connected to the inner side wall of the pair of openings (22), and the valve plate (31) passes through the inner side wall of the pair of openings (22), and the valve plate (31) is slidably connected to ... 2) A vertical part and an inclined part located at the bottom of the vertical part are provided on the side away from the valve plate (31); the straight rod (33) is fixed to the top surface of the partition plate (11), and the straight rod (33) is located on the side of the push block (32) away from the valve plate (31); the float (34) is sleeved on the outside of the straight rod (33), and the float (34) and the straight rod (33) slide together; the top surface of the float (34) is fixed to the electric push rod (37) through the connecting rod (36); the output end of the electric push rod (37) is fixed to a round rod (38) that can contact and cooperate with the inclined part; a notch (321) is provided on the vertical part; the round rod (38) can be inserted into the notch (321); A first contact (4) is provided on the outer wall of the output end of the electric actuator (37); a second contact (41) is provided on the vertical part at the top of the first recess (321); the second contact (41) can contact the first contact (4) when the round rod (38) is inserted into the recess (321); a power supply (42) is provided on the housing (1); one pole of the power supply (42) is electrically connected to the first contact (4), and the other pole of the power supply (42) is electrically connected to one terminal of the solenoid valve (141); the other terminal of the solenoid valve (141) is electrically connected to the second contact (41); A rubber ring (221) is fixed to the inner wall of each of the two openings (22); the inner wall of the rubber ring (221) is in close contact with the outer wall of the valve plate (31).

2. The alkali reduction wastewater treatment device according to claim 1, characterized in that: A motor (5) is installed on the outer wall of the box (1); a rotating shaft (51) extending into the first cavity (12) is coaxially fixed to the output end of the motor (5); a stirring plate (52) is fixed to the outer wall of the rotating shaft (51).

3. The alkali reduction wastewater treatment device according to claim 2, characterized in that: The bottom surface of the partition (11) is fixedly connected to a connecting pipe (15) that connects the first cavity (12) and the second cavity (13); a first valve is provided on the connecting pipe (15); a filter plate (6) is fixedly connected to the inner wall of the second cavity (13); a filter screen (61) is provided on the filter plate (6); a drain pipe (16) that connects the second cavity (13) and the external environment is fixedly connected to the bottom surface of the box (1); a second valve is provided on the drain pipe (16).

4. The alkali reduction wastewater treatment device according to claim 3, characterized in that: The filter plate (6) is provided with an annular groove (62) surrounding the outer periphery of the filter screen (61); a reciprocating screw (53) coaxial with the rotating shaft (51) is rotatably connected to the inner wall of the second cavity (13); the reciprocating screw (53) is located at the top of the filter screen (61), and a cleaning brush (54) is sleeved on the outside of the reciprocating screw (53) and threadedly engaged with the reciprocating screw (53); the cleaning brush (54) is slidably engaged with the inner wall of the second cavity (13), and the bristles of the cleaning brush (54) are in contact with the top surface of the filter screen (61); a transmission component (55) is provided at one end of the reciprocating screw (53) to enable the rotating shaft (51) to drive the reciprocating screw (53) to rotate.

5. The alkali reduction wastewater treatment device according to claim 4, characterized in that: The transmission assembly (55) includes a first pulley (551), a second pulley (552), and a belt (553); the first pulley (551) is coaxially fixed to the outer side wall of the end of the rotating shaft (51); the second pulley (552) is coaxially fixed to the outer side wall of the end of the reciprocating screw (53); the belt (553) is sleeved on the outside of the first pulley (551) and the second pulley (552), and the belt (553) causes the first pulley (551) and the second pulley (552) to move together.

6. The alkali reduction wastewater treatment device according to claim 4, characterized in that: A pump body (7) is installed on the outer wall of the box (1); the pump body (7) has a suction pipe (71) fixedly connected to the input end of the pump body (7) extending into the annular groove (62), and a discharge pipe (72) connected to the output end of the pump body (7) to communicate with the external environment.

7. A method for treating alkali-reduction wastewater in a differentiated manner, based on the alkali-reduction wastewater treatment device according to any one of claims 1-6, characterized in that: The processing method includes the following steps: S1: Wastewater and medicine are transported to the first cavity (12) of the box (1) through the wastewater pipe (14) and the dosing pipe (21) respectively for reaction, and the amount of medicine transported is controlled by the valve mechanism (3) set on the dosing pipe (21); S2: Start the motor (5) to drive the stirring plate (52) to rotate, so that the wastewater and the medicine can react fully in the first chamber; S3: The water solution after the wastewater and the medicine solution react is transported to the second chamber (13) through the connecting pipe (15). The filter screen (61) set on the filter plate (6) filters the sediment and impurities in the water solution. Then the water solution with the sediment and impurities removed is discharged to the outside of the box (1) through the drain pipe (16), thereby realizing the treatment of wastewater.

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