Pesticide wastewater treatment device and method

Abstract

The invention provides a pesticide wastewater treatment device and method, and belongs to the technical field of pesticide wastewater treatment. According to the invention, a plurality of neutralization bins, circulation bins, enhanced reaction bins and ozone reaction bins which are communicated in sequence are arranged in the tank body, when pesticide wastewater passes through the neutralization bins, a neutralization agent is added into the neutralization bins for neutralization, the pH value of the pesticide wastewater is adjusted, and the neutralized pesticide wastewater is introduced into the circulation bins for circulation aerobic biochemical treatment; in order to further guarantee the reaction efficiency of the circulating aerobic biochemical treatment, a stirring structure is arranged in the circulating bin, and the pesticide wastewater in the circulating bin can be stirred to increase the contact area with air through the arrangement of the stirring structure; meanwhile, an angle adjusting unit is arranged on the stirring structure, so that the angle of a main paddle can be adjusted in real time according to different reaction concentrations of the pesticide wastewater, and the maximum reaction efficiency under any condition is ensured.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of pesticide wastewater treatment, and particularly relates to a pesticide wastewater treatment device and method. BACKGROUND

[0002] In the prior art, some reagents need to be added to degrade and precipitate the organic matter or inorganic matter contained in the agricultural wastewater during the treatment of the pesticide wastewater. However, due to the high concentration of the pesticide wastewater, a large amount of reagents need to be consumed in the physicochemical treatment, and the operation cost is high. In addition, since the biological and chemical reactions (aerobic reaction type) need to occur in the purification treatment, the efficiency of the physicochemical reaction of the pesticide wastewater is affected when the pesticide wastewater is not fully contacted with air. Meanwhile, a large amount of organic wastewater is generated in the pesticide production process, and effective treatment of the refractory organic wastewater is conducive to reducing pesticide pollution. In the treatment of the pesticide wastewater, the organic waste molecules mixed in the pesticide wastewater are difficult to be completely treated, so that the toxic effect of the pesticide wastewater is not good after the treatment. The stirring, aeration, reaction and filtration of the pesticide wastewater are all treated by separate equipment, which increases the equipment investment cost. SUMMARY

[0003] The embodiment of the present application provides a pesticide wastewater treatment device, which aims to solve the problem that the efficiency of the physicochemical reaction of the pesticide wastewater is reduced when the pesticide wastewater is not fully contacted with air in the prior art.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0005] In a first aspect, a pesticide wastewater treatment device is provided, which comprises a tank body, an aeration assembly and a stirring structure. The tank body is provided with a plurality of sealed chambers which are sequentially connected in the height direction, and the plurality of sealed chambers are sequentially connected in the height direction. The neutralization chamber, the circulation chamber, the enhanced reaction chamber and the ozone reaction chamber are sequentially connected from top to bottom. The tank body is provided with a feed pipe connected with the neutralization chamber and an exhaust pipe connected with the ozone reaction chamber. The aeration assembly is arranged at the bottom of the circulation chamber and is used to provide air to the pesticide wastewater in the circulation chamber. The stirring structure is arranged in the circulation chamber and is used to stir the pesticide wastewater.

[0006] In combination with the first aspect, in a possible implementation manner, the stirring structure comprises a stirring shaft, a plurality of main blades, a driving mechanism and an angle adjusting unit. The stirring shaft is provided with a plurality of main blades at the end thereof. The driving mechanism is used to drive the stirring shaft to rotate. The angle adjusting unit is arranged on the stirring shaft, and the angle adjusting unit is connected with the plurality of main blades. The angle adjusting unit is used to adjust the angle of the main blades.

[0007] In combination with the first aspect, in a possible implementation manner, the angle adjusting unit comprises:

[0008] an execution motor, in communication connection with the control unit of the external device;

[0009] a transmission gear set, comprising a driving gear and a driven gear, the driving gear being connected with the output shaft of the execution motor, the driven gear being in mesh with the driving gear;

[0010] a rotating shaft, penetrating the driven gear, the central axis of the rotating shaft being collinear with the central axis of the driven gear, one end of the rotating shaft being connected with the main paddle.

[0011] With reference to the first aspect, in a possible implementation manner, the main paddle and the stirring shaft are further provided with a folding unit.

[0012] With reference to the first aspect, in a possible implementation manner, the main paddle and the stirring shaft are rotatably connected, the outer circumferential side of the stirring shaft is provided with a plurality of recesses, and the plurality of recesses are one-to-one corresponding to the plurality of main paddles; the folding unit comprises:

[0013] a telescopic rod, one end of the telescopic rod being connected with the main paddle through a spherical hinge component, and the telescopic rod being slidable along the axis direction of the stirring shaft;

[0014] a driver, provided on the stirring shaft, an output end of the driver being connected with the other end of the telescopic rod, and the other end of the telescopic rod being connected with the stirring shaft through a spherical hinge component.

[0015] With reference to the first aspect, in a possible implementation manner, the stirring shaft comprises:

[0016] a stirring main shaft, provided with an open cavity along the central axis of the stirring main shaft;

[0017] a telescopic auxiliary shaft, the telescopic auxiliary shaft being a rod-shaped object that is adjustable in length direction, the telescopic auxiliary shaft being arranged in the open cavity, and one end of the telescopic auxiliary shaft being exposed to the end face of the open cavity;

[0018] a hydraulic driving system, used for driving the telescopic auxiliary shaft to be telescopic in the stirring main shaft;

[0019] an auxiliary stirring paddle, arranged at the end of the telescopic auxiliary shaft, the auxiliary stirring paddle being in a spiral shape.

[0020] With reference to the first aspect, in a possible implementation manner, the hydraulic driving system comprises a micro hydraulic pump, a hydraulic cylinder and a hydraulic pipeline; the micro hydraulic pump is used for providing power, the micro hydraulic pump delivers hydraulic oil to the hydraulic cylinder through the hydraulic pipeline, and is used for driving the telescopic auxiliary shaft to be telescopic in the open cavity along the linear bearing.

[0021] With reference to the first aspect, in a possible implementation manner, a linear bearing is arranged between the scalable secondary shaft and the stirring main shaft.

[0022] With reference to the second aspect, the embodiment of the present application provides a pesticide wastewater treatment method, comprising the pesticide wastewater treatment device in any one of the embodiments of the first aspect, and the method comprises the following steps.

[0023] S1: introducing the pesticide wastewater into the neutralization bin, adding a neutralizing agent for neutralization, and adjusting the pH value of the pesticide wastewater;

[0024] S2: introducing the neutralized pesticide wastewater into the circulating bin for circulating aerobic biochemical treatment;

[0025] S3: introducing the pesticide wastewater treated by the circulating aerobic biochemical treatment into the intensification reaction bin for intensification aerobic biochemical treatment;

[0026] S4: introducing the pesticide wastewater treated by the intensification aerobic biochemical treatment into the ozone reaction bin for ozone oxidation treatment, so as to remove the refractory organic matter in the pesticide wastewater;

[0027] S5: part of the pesticide wastewater treated by the ozone oxidation treatment is backflowed into the circulating bin through the connecting pipeline, and the other part is directly discharged through the discharge pipeline.

[0028] With reference to the second aspect, in a possible implementation manner, the neutralizing agent is a sulfuric acid solution, a sodium hydroxide solution, a hydrochloric acid solution or lime water.

[0029] With reference to the first aspect, the embodiment of the present application provides a pesticide wastewater treatment device, and compared with the prior art, the present application comprises a plurality of sequentially connected neutralization bin, circulating bin, intensification reaction bin and ozone reaction bin in the tank body. When the pesticide wastewater passes through the neutralization bin, a neutralizing agent is added in the neutralization bin for neutralization, so as to adjust the pH value of the pesticide wastewater. The neutralized pesticide wastewater is introduced into the circulating bin for circulating aerobic biochemical treatment. In order to further ensure the reaction efficiency of the circulating aerobic biochemical treatment, a stirring structure is arranged in the circulating bin. The stirring structure can stir the pesticide wastewater in the circulating bin to increase the contact area with air. Meanwhile, the stirring structure is provided with an angle adjusting unit, which can adjust the angle of the main paddle according to the different reaction concentrations of the pesticide wastewater in real time, so as to ensure the maximum reaction efficiency in any case. The technical problem of the prior art that the materialization reaction efficiency of the pesticide wastewater is reduced when the pesticide wastewater is not fully contacted with air is solved.

[0030] In a second aspect, the embodiment of the present application further provides a pesticide wastewater treatment method. The pesticide wastewater is introduced into a neutralization bin, neutralized by adding a neutralizing agent, and the pH value of the pesticide wastewater is adjusted; the neutralized pesticide wastewater is introduced into a circulation bin for a circulation aerobic biochemical treatment; the pesticide wastewater after the circulation aerobic biochemical treatment is introduced into a strengthening reaction for a strengthening aerobic biochemical treatment; the pesticide wastewater after the strengthening aerobic biochemical treatment is introduced into an ozone reaction bin for an ozone oxidation treatment to remove the refractory organic matter in the pesticide wastewater; and part of the pesticide wastewater after the ozone oxidation treatment is backflowed into the circulation bin through a connecting pipeline, and the other part is directly discharged through a discharge pipeline. By integrating the neutralization bin, the circulation bin, the strengthening reaction bin and the ozone reaction bin into one tank body, the space is saved, and the production plants of different scales can be applied. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A three-dimensional structure schematic of the tank body provided by the embodiment of the present application Figure 1 ;

[0032] Figure 2 A three-dimensional structure schematic of the stirring structure provided by the embodiment of the present application Figure 2 ;

[0033] Figure 3 A local enlarged view of the A area in Figure 2 ;

[0034] Figure 4 A structure schematic of the angle adjusting unit and the main paddle provided by the embodiment of the present application

[0035] BRIEF DESCRIPTION OF DRAWINGS:

[0036] 1, tank body; 2, stirring structure; 21, stirring shaft; 22, main paddle; 3, angle adjusting unit; 31, execution motor; 32, transmission gear set; 321, driving gear; 322, driven gear; 33, rotating shaft; 4, folding unit; 200, recess; 41, telescopic rod; 42, spherical hinge component; 211, stirring main shaft; 212, telescopic auxiliary shaft; 210, open cavity; 213, auxiliary stirring paddle. DETAILED DESCRIPTION

[0037] In order to make the technical problems to be solved by the present application, the technical solutions and beneficial effects more clearly understood, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0038] It needs to be further explained that the drawings and embodiments of the present application mainly describe the concept of the present application, and on the basis of the concept, the specific forms and settings of some connection relationships, position relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be completely described, but those skilled in the art can realize the above-mentioned specific forms and settings in a well-known manner on the premise of understanding the concept of the present application.

[0039] When an element is referred to as being "fixed to" or "set to" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0040] The terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0041] The terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, and the meaning of "several" is one or more, unless otherwise explicitly specified.

[0042] Please refer to Figures 1 to 4 , now the pesticide wastewater treatment device provided by the present application will be described.

[0043] A pesticide wastewater treatment device, comprising a tank body 1, an aeration assembly and a stirring structure 2. The tank body 1 is provided with a plurality of sealed chambers in sequence along the height direction, and the plurality of sealed chambers are sequentially arranged from top to bottom as a neutralization chamber, a circulation chamber, a strengthening reaction chamber and an ozone reaction chamber. The tank body 1 is provided with a feed pipe connected with the neutralization chamber and an exhaust pipe connected with the ozone reaction chamber. The aeration assembly is arranged at the bottom of the circulation chamber for providing air to the pesticide wastewater in the circulation chamber. The stirring structure 2 is arranged in the circulation chamber for stirring the pesticide wastewater.

[0044] When the device is in operation, the pesticide wastewater enters the neutralization bin through the feeding pipe to be initially adjusted in terms of pH value. Then, the wastewater flows into the circulation bin, the aeration assembly fills air into the bin, and the stirring structure 2 operates to make the wastewater and the air fully mixed to promote the preliminary degradation of the pollutants. Subsequently, the wastewater enters the intensified reaction bin to be subjected to more in-depth reaction treatment. Finally, in the ozone reaction bin, the residual pollutants are further decomposed by using the strong oxidizing property of ozone, and the wastewater that meets the standards is discharged through the discharge pipe.

[0045] Compared with the prior art, the pesticide wastewater treatment device provided by the embodiment of the present application has the tank body 1 provided with the neutralization bin, the circulation bin, the intensified reaction bin and the ozone reaction bin that are sequentially communicated. When the pesticide wastewater passes through the neutralization bin, the neutralization agent is added into the neutralization bin to neutralize the pesticide wastewater and adjust the pH value of the pesticide wastewater. The pesticide wastewater that has been neutralized is introduced into the circulation bin to be subjected to the circulation aerobic biochemical treatment. In order to further ensure the reaction efficiency of the circulation aerobic biochemical treatment, the stirring structure 2 is arranged in the circulation bin. The arrangement of the stirring structure 2 can stir the pesticide wastewater in the circulation bin to increase the contact area of the pesticide wastewater with the air.

[0046] The aeration assembly is mainly installed at the bottom of the circulation bin, and its core function is to continuously deliver air to the pesticide wastewater in the circulation bin. When in operation, the air is released into the wastewater in the form of bubbles through the aeration assembly. During the rising process of the bubbles, on the one hand, the bubbles provide sufficient dissolved oxygen for the wastewater to meet the oxygen demand of the aerobic microorganisms or chemical reactions. On the other hand, the stirring effect of the bubbles can assist the stirring structure 2 to promote the more uniform mixing of the wastewater with the air, the agent and the like, to strengthen the degradation reaction conditions of the pollutants and to improve the overall treatment efficiency.

[0047] In some embodiments, the above-mentioned stirring structure 2 includes a stirring shaft 21, a plurality of main blades 22, a driving mechanism and an angle adjusting unit 3. The stirring shaft 21 is provided with a plurality of main blades 22 at the end thereof. The driving mechanism is used to drive the stirring shaft 21 to rotate. The angle adjusting unit 3 is arranged on the stirring shaft 21 and connected with the plurality of main blades 22. The angle adjusting unit 3 is used to adjust the angle of the main blades 22.

[0048] When in operation, the driving mechanism drives the stirring shaft 21 to rotate to make the main blades 22 stir the pesticide wastewater in the circulation bin to promote the mixing of the wastewater with the air. The angle adjusting unit 3 can change the angle of the main blades 22 according to the requirements to adjust the stirring range of the main blades 22, so as to flexibly adjust the stirring intensity and the water flow direction. Such a design can make the pesticide wastewater more fully mixed, improve the aeration effect, enhance the degradation efficiency of the pollutants and guarantee the stability and efficiency of the wastewater treatment effect.

[0049] Further, the angle adjusting unit 3 comprises an execution motor 31, a transmission gear set 32 and a rotating shaft 33. The execution motor 31 is in communication connection with the control unit of the external device. The transmission gear set 32 comprises a driving gear 321 and a driven gear 322, the driving gear 321 is connected with the output shaft of the execution motor 31, and the driven gear 322 is in meshing relationship with the driving gear 321. The rotating shaft 33 is arranged in the driven gear 322, the central axis of the rotating shaft 33 is in line with the central axis of the driven gear 322, and one end of the rotating shaft 33 is connected with the main blade 22.

[0050] In operation, the control unit of the external device sends a command to the execution motor 31, the execution motor 31 is started to drive the driving gear 321 to rotate, the driving gear 321 drives the driven gear 322 to rotate through the meshing relationship, the driven gear 322 drives the rotating shaft 33 arranged therein, and then the angle of the main blade 22 is adjusted. The angle adjusting unit 3 can flexibly change the angle of the main blade 22 according to the wastewater treatment demand, optimize the stirring intensity and the water flow direction, enhance the mixing degree of the pesticide wastewater, improve the aeration effect and the pollutant degradation efficiency, and ensure the stability and efficiency of the wastewater treatment.

[0051] Further, the folding unit 4 is arranged between the main blade 22 and the stirring shaft 21.

[0052] The folding unit 4 between the main blade 22 and the stirring shaft 21 can automatically adjust the shape with the change of the angle of the main blade 22: when the angle adjusting unit 3 drives the main blade 22 to change the inclination angle, the connecting rod or the hinged structure of the folding unit 4 synchronously acts to fold or unfold the blade part. For example, when the angle of the blade is increased, the folding unit 4 is unfolded to increase the contact area of the blade and the wastewater. When the angle is decreased, the folding unit 4 is folded to reduce the stirring resistance.

[0053] The main blade 22 is rotationally connected with the stirring shaft 21, the outer circumferential side of the stirring shaft 21 is provided with a plurality of recesses 200, and the plurality of recesses 200 are arranged in one-to-one correspondence with the plurality of main blades 22. The folding unit 4 comprises: one end of a telescopic rod 41 is connected with the main blade 22 through a spherical hinge part 42, and the telescopic rod 41 can slide along the axis direction of the stirring shaft 21. A driver is arranged on the stirring shaft 21, an output end of the driver is connected with the other end of the telescopic rod 41, and the other end of the telescopic rod 41 is connected with the stirring shaft 21 through the spherical hinge part 42.

[0054] After the driver is started, the telescopic rod 41 is controlled to slide along the axis direction of the stirring shaft 21. Since the two ends of the telescopic rod 41 are connected with the main blade 22 and the stirring shaft 21 through the spherical hinge parts 42 respectively, the telescopic movement of the telescopic rod 41 will drive the main blade 22 to rotate around the rotationally connected point with the stirring shaft 21.

[0055] When the telescopic rod 41 is retracted, the main paddle 22 is folded towards the stirring shaft 21, and the paddle part is embedded in the recess 200 on the outer periphery of the stirring shaft 21, reducing the contact area of the paddle with the wastewater. When the telescopic rod 41 is extended, the main paddle 22 is unfolded from the recess 200, increasing the stirring coverage.

[0056] The spherical hinge part 42 allows the telescopic rod 41 to rotate in three-dimensional space, so that the main paddle 22 can adaptively adjust the angle during folding or unfolding, ensuring that the relative position with the stirring shaft 21 always matches the structure of the recess 200.

[0057] By the telescopic rod 41, the main paddle 22 is switched between the "high-efficiency stirring state" (unfolded) and the "low-resistance energy-saving state" (folded), adapting to the needs of different stages of wastewater treatment (such as unfolding to enhance disturbance in the mixing stage, and folding to reduce water flow interference in the sedimentation stage).

[0058] The recess 200 of the stirring shaft 21 is designed to provide storage space for the folded paddle, avoiding the paddle from colliding with the wastewater or the inner wall of the equipment in the non-working state, prolonging the service life.

[0059] When unfolded, the paddle area is increased, and the mixing effect of wastewater, air and chemicals is enhanced. When folded, the stirring resistance is reduced, and the motor energy consumption is reduced, realizing the double optimization of energy saving and high efficiency.

[0060] The stirring shaft 21 comprises a stirring main shaft 211, a telescopic secondary shaft 212, a hydraulic drive system and an auxiliary stirring paddle 213. The stirring main shaft 211 is provided with an open cavity 210 along the central axis of the stirring main shaft 211. The telescopic secondary shaft 212 is a rod-shaped object that can be adjusted in length direction, and is arranged in the open cavity 210, and one end of the telescopic secondary shaft 212 is exposed to the end face of the open cavity 210. The hydraulic drive system is used to push the telescopic secondary shaft 212 to telescope in the stirring main shaft 211. The auxiliary stirring paddle 213 is arranged at the end of the telescopic secondary shaft 212, and the auxiliary stirring paddle 213 is in a spiral shape.

[0061] The hydraulic drive system pushes the telescopic secondary shaft 212 to telescope in the open cavity 210 of the stirring main shaft 211 along the axis direction through the change of oil line pressure.

[0062] When the stirring effect needs to be enhanced, the telescopic secondary shaft 212 is extended from the exposed end of the open cavity 210, driving the auxiliary stirring paddle 213 at the end to enter the wastewater area. When auxiliary stirring is not needed or resistance needs to be reduced, the telescopic secondary shaft 212 is retracted into the open cavity 210.

[0063] The auxiliary stirring paddle 213 rotates synchronously with the main paddle 22 after being extended by the telescopic secondary shaft 212 (the stirring main shaft 211 is rotated by the driving mechanism). The helical structure generates axial thrust during rotation, pushing the wastewater to flow up and down along the axis of the stirring shaft 21, forming a three-dimensional mixing flow field with the radial stirring of the main paddle 22.

[0064] The helical auxiliary stirring paddle 213 can increase axial water flow circulation based on the radial stirring of the main paddle 22, forming a "radial + axial" three-dimensional mixing effect, enhancing the uniformity of the contact between wastewater and reagents, air, and improving the efficiency of pollutant degradation.

[0065] Through the telescopic adjustment of the telescopic secondary shaft 212, the working state of the auxiliary stirring paddle 213 can be flexibly controlled according to the wastewater treatment stage (such as neutralization, circulation reaction, and precipitation):

[0066] When extended: suitable for stages that require high-intensity mixing (such as aeration reaction in the circulation bin).

[0067] When retracted: reduces stirring resistance, suitable for low energy consumption demand stages or equipment maintenance scenarios.

[0068] When the telescopic secondary shaft 212 is retracted, the auxiliary stirring paddle 213 is housed in the open cavity 210, avoiding collision with wastewater or tank body 1 components, reducing mechanical wear. At the same time, the auxiliary stirring function is activated as needed, reducing unnecessary energy consumption loss and achieving energy-saving operation.

[0069] The hydraulic drive system includes a miniature hydraulic pump, a hydraulic cylinder, and a hydraulic pipeline. The miniature hydraulic pump is used to provide power, and the miniature hydraulic pump delivers hydraulic oil to the hydraulic cylinder through the hydraulic pipeline to push the telescopic secondary shaft 212 to extend and retract in the open cavity 210 along the linear bearing.

[0070] After the miniature hydraulic pump is started, the motor drives the hydraulic oil circulation to generate a pressure oil flow. The pressure oil is delivered to the hydraulic cylinder through the hydraulic pipeline to drive the piston in the hydraulic cylinder to move. The linear motion of the piston is transmitted to the telescopic secondary shaft 212 through mechanical connection, making it slide along the linear bearing in the open cavity 210 of the stirring main shaft 211: when the hydraulic oil is injected into the rodless cavity of the hydraulic cylinder, the piston drives the telescopic secondary shaft 212 to extend outward, and the auxiliary stirring paddle 213 is deployed. When the hydraulic oil flows back to the rod cavity, the telescopic secondary shaft 212 is retracted into the open cavity 210, and the auxiliary stirring paddle 213 is housed.

[0071] The hydraulic drive system transmits power stably through oil pressure, can realize stepless adjustment and precise positioning of the telescopic secondary shaft 212, and ensures the telescopic precision of the auxiliary stirring paddle 213 under different working conditions (such as accurately controlling the extension length according to the treatment requirements).

[0072] The hydraulic transmission has large thrust force, can effectively overcome the resistance of the wastewater to push the telescopic secondary shaft 212 to act, and the buffering effect of the hydraulic oil can reduce the impact and vibration in the telescoping process, thereby ensuring the stability of the stirring shaft 21.

[0073] The micro hydraulic pump has small volume and high integration, and is suitable for being installed in a compact space inside the stirring shaft 21.

[0074] The closed design of the hydraulic pipeline can avoid oil leakage, and when the system is maintained, the fault can be quickly located through the pressure detection of the hydraulic oil, thereby improving the reliability of the equipment.

[0075] Specifically, a linear bearing is arranged between the telescopic secondary shaft 212 and the stirring main shaft 211.

[0076] The linear bearing is fixed in the open cavity 210 of the stirring main shaft 211, provides accurate guidance for the linear motion of the telescopic secondary shaft 212, ensures that the telescopic secondary shaft 212 stably telescopes along the central axis of the stirring shaft 21, and avoids mechanical wear or jam caused by eccentric shaking. The ball or sliding structure inside the linear bearing can reduce the friction coefficient between the telescopic secondary shaft 212 and the stirring main shaft 211, make the telescopic secondary shaft 212 more smoothly, and improve the response efficiency and energy utilization rate of the hydraulic driving system.

[0077] The ball or sliding surface of the linear bearing is treated by lubrication (such as built-in grease), forms a low-friction interface when the telescopic secondary shaft 212 moves, reduces the energy loss in the telescoping process, and reduces the heat and noise generated by friction.

[0078] The low-resistance characteristic of the linear bearing cooperates with the thrust force of the hydraulic drive, so that the telescopic secondary shaft 212 can quickly respond to the pressure change of the hydraulic system, realize the “stop” of the auxiliary stirring paddle 213, and adapt to the dynamic adjustment demand of the stirring intensity in the wastewater treatment process.

[0079] Based on the same inventive concept, the embodiments of the present application provide a pesticide wastewater treatment method, which comprises the pesticide wastewater treatment device of any one of the first aspect embodiments. The method comprises the following steps:

[0080] S1: introducing the pesticide wastewater into the neutralizing bin, adding a neutralizing agent for neutralization, and adjusting the pH value of the pesticide wastewater.

[0081] S2: introducing the neutralized pesticide wastewater into the circulating bin for circulating aerobic biochemical treatment.

[0082] S3: introducing the pesticide wastewater treated by the circulating aerobic biochemical treatment into the intensified reaction for intensified aerobic biochemical treatment.

[0083] S4: the pesticide wastewater after the reinforced aerobic biochemical treatment is introduced into an ozone reaction bin for ozone oxidation treatment to remove the refractory organic matters in the pesticide wastewater.

[0084] S5: part of the pesticide wastewater after the ozone oxidation treatment is backflowed into the circulating bin through a connecting pipeline, and another part is directly discharged through a discharge pipeline.

[0085] Specifically, the neutralizing agent is a sulfuric acid solution, a sodium hydroxide solution, a hydrochloric acid solution or lime water.

[0086] The above merely describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pesticide wastewater treatment device, characterized in that: include: The tank body is provided with a plurality of sealed chambers connected in sequence along the height direction, wherein the plurality of sealed chambers are a neutralization chamber, a circulation chamber, an enhanced reaction chamber and an ozone reaction chamber from top to bottom; the tank body is provided with a feed pipe connected to the neutralization chamber and an external discharge pipe connected to the ozone reaction chamber; an aeration assembly, disposed at the bottom of the circulation bin, for providing air to the pesticide wastewater in the circulation bin; The stirring structure is arranged in the circulation bin and is used for stirring the pesticide wastewater.

2. The pesticide wastewater treatment device according to claim 1, characterized in that: The stirring structure includes a stirring shaft, multiple main blades, a driving mechanism and an angle adjustment unit; multiple main blades are provided at the end of the stirring shaft, the driving mechanism is used to drive the stirring shaft to rotate, the angle adjustment unit is provided on the stirring shaft, the angle adjustment unit is connected to the multiple main blades, and the angle adjustment unit is used to adjust the angle of the main blades.

3. The pesticide wastewater treatment device according to claim 2, characterized in that: The angle adjustment unit includes: Execute the motor and communicate with the control unit of the peripheral device; A transmission gear set, comprising a driving gear and a driven gear, wherein the driving gear is connected to the output shaft of the actuator motor, and the driven gear and the driving gear are meshed with each other; A rotating shaft is provided in the driven gear, a central axis of the rotating shaft is collinear with the central axis of the driven gear, and one end of the rotating shaft is connected to the main blade.

4. The pesticide wastewater treatment device according to claim 3, characterized in that: A folding unit is further provided between the main blade and the stirring shaft.

5. The pesticide wastewater treatment device according to claim 4, characterized in that: The main blade is rotatably connected to the stirring shaft, and a plurality of recesses are provided on the outer circumference of the stirring shaft, and the plurality of recesses are arranged in a one-to-one correspondence with the plurality of main blades; the folding unit includes: a telescopic rod, one end of which is connected to the main blade via a spherical hinge component, and the telescopic rod can slide along the axis of the stirring shaft; The driver is arranged on the stirring shaft, the output end of the driver is connected to the other end of the telescopic rod, and the other end of the telescopic rod is connected to the stirring shaft through a spherical hinge component.

6. The pesticide wastewater treatment device according to claim 5, characterized in that: The stirring shaft comprises: A stirring main shaft, with an open cavity provided along the central axis of the stirring main shaft; A telescopic secondary shaft, the telescopic secondary shaft being a rod-shaped object that is telescopically adjustable along its length, the telescopic secondary shaft being disposed in the open cavity, and one end of the telescopic secondary shaft being exposed at an end surface of the open cavity; A hydraulic drive system, used for driving the retractable secondary shaft to retract within the stirring main shaft; The auxiliary stirring paddle is arranged at the end of the retractable secondary shaft, and the auxiliary stirring paddle is spiral-shaped.

7. The pesticide wastewater treatment device according to claim 6, characterized in that: The hydraulic drive system includes a micro hydraulic pump, a hydraulic cylinder and a hydraulic pipeline; the micro hydraulic pump is used to provide power, and the micro hydraulic pump transports hydraulic oil to the hydraulic cylinder through the hydraulic pipeline to push the retractable secondary shaft to retract and retract along the linear bearing in the open cavity.

8. The pesticide wastewater treatment device according to claim 7, characterized in that: A linear bearing is provided between the telescopic secondary shaft and the stirring main shaft.

9. A method for treating pesticide wastewater, comprising the pesticide wastewater treatment device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Introduce the pesticide wastewater into the neutralization tank, add neutralizing agent for neutralization, and adjust the pH value of the pesticide wastewater; S2: introducing the neutralized pesticide wastewater into the circulation chamber for cyclic aerobic biochemical treatment; S3: introducing the pesticide wastewater after the circulating aerobic biochemical treatment into the enhanced reaction for enhanced aerobic biochemical treatment; S4: introducing the pesticide wastewater after enhanced aerobic biochemical treatment into the ozone reaction chamber for ozone oxidation treatment to remove the difficult-to-biodegrade organic matter in the pesticide wastewater; S5: Part of the pesticide wastewater after ozone oxidation treatment flows back to the circulation chamber through the connecting pipe, and the other part is directly discharged through the discharge pipe.

10. The method for treating pesticide wastewater according to claim 9, wherein: The neutralizing agent is sulfuric acid solution, sodium hydroxide solution, hydrochloric acid solution or lime water.

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