Agricultural non-point source pollution treatment device

Abstract

The invention relates to the technical field of agricultural pollution treatment, in particular to an agricultural non-point source pollution treatment device which comprises a multi-stage treatment tank, and a water inlet is formed in the top end of the multi-stage treatment tank; the first-stage separation mechanism comprises a separation cylinder used for separating large impurities in sewage, and the separation cylinder is composed of a separation frame and a fine-mesh filter screen; and the secondary separation mechanism comprises a self-adaptive adding assembly used for adding a medicament, the self-adaptive adding assembly comprises a rotating ball which rotates passively, and a plurality of medicament adding grooves which are arranged in a circumferential array mode are formed in the outer wall of the rotating ball. After agricultural sewage is discharged into the multi-stage treatment tank through the water inlet, solid and liquid are primarily separated through high-speed rotation of the centrifugal cylinder in the first-stage separation mechanism; separated liquid enters a conical water collecting cover, part of sewage enters a detection shell to detect the content of suspended particles, and a proper amount of flocculating agent is added into the sewage through a self-adaptive adding assembly according to a detection result.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural pollution control, and in particular to an agricultural non-point source pollution control device. Background Art

[0002] Agricultural non-point source pollution refers to the nitrogen, phosphorus, organic matter and other nutrients produced in the agricultural production process due to the irrational use of chemical inputs such as fertilizers, pesticides, and ground films, and improper treatment of livestock and aquaculture waste, crop straw, etc., which, driven by rainfall and topography, pollute the ecological environment through surface and underground runoff and soil erosion. These processes are closely related to the generation and impact of agricultural wastewater.

[0003] In agricultural production, the irrational use of chemical inputs such as fertilizers, pesticides, and ground film causes nutrients, pesticide residues, and ground film chemicals in the soil to enter the water body through surface runoff and infiltration through rainfall and irrigation, generating agricultural wastewater. In addition, if crop straw is discarded at will and allowed to rot and decompose, or is burned and then settled through the atmosphere, the nutrients and pollutants it contains enter the water body, which also increases the content of organic matter and nutrients in agricultural wastewater and deteriorates water quality. Therefore, agricultural wastewater needs to be treated. For example, an agricultural wastewater treatment and environmental protection equipment disclosed in application number CN202010814082.9 is for agricultural wastewater treatment.

[0004] There are many deficiencies in the existing technology for agricultural wastewater treatment. Usually, multiple devices need to be used in coordination, and each device only has a single-stage treatment, and it is impossible to perform continuous multi-stage treatment on the sewage, which greatly reduces the treatment effect and makes it difficult to deeply purify the sewage. In addition, when the sewage is transported between different devices, the transportation equipment needs to be started and stopped many times, which not only takes a certain amount of time, prolongs the overall treatment cycle, and increases the treatment cost, but also may damage the transportation equipment due to frequent start and stop, shortening the service life of the equipment. When the sewage is transported to the device where the agent needs to be added, the amount of sewage needs to be detected and the impurity content in the sewage needs to be analyzed before the appropriate amount of agent can be prepared for treatment. This process is cumbersome and further increases the labor cost and time cost. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides an agricultural non-point source pollution control device, which can effectively solve the problem that the prior art cannot perform multi-stage treatment.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The present invention provides an agricultural non-point source pollution control device, comprising:

[0008] A multi-stage treatment tank, wherein a water inlet is provided at the top of the multi-stage treatment tank;

[0009] A primary separation mechanism, the primary separation mechanism comprises a separation cylinder for separating larger impurities from sewage, the separation cylinder being composed of a separation frame and a fine-mesh filter;

[0010] A secondary separation mechanism, the secondary separation mechanism includes an adaptive adding component for adding medicine, the adaptive adding component includes a passively rotating rotating ball, the outer wall of the rotating ball is provided with a plurality of dosing grooves arranged in a circumferential array, the inner wall of the multi-stage treatment tank is fixedly connected with a medicine box, the bottom end of the medicine box is fixedly connected with a hemispherical liquid outlet groove, the bottom end of the hemispherical liquid outlet groove is provided with a liquid outlet in airtight contact with the rotating ball, and the liquid outlet is intermittently connected with a plurality of dosing grooves respectively;

[0011] The stirring and cleaning mechanism comprises a rotating rod rotatably arranged on the inner bottom wall of the multi-stage processing tank, and a plurality of stirring plates are fixedly connected to the outer wall of the rotating rod.

[0012] Preferably, the primary separation mechanism includes a plurality of fixed blocks fixedly connected to the circumference of the inner wall of the multi-stage processing tank, the outer walls of the plurality of fixed blocks are commonly fixedly connected to a support plate, the bottom end of the support plate is fixedly connected to a first motor, the output end of the first motor is fixedly connected to the bottom end of the separation cylinder, and the bottom end of the separation cylinder is rotatably connected to the upper surface of the support plate, the inner wall of the multi-stage processing tank is fixedly connected to an extension block, the other end of the extension block is fixedly connected to an inclined cleaning plate, and the outer wall of the inclined cleaning plate is in contact with the inner circumferential wall of the fine-mesh filter.

[0013] Preferably, the secondary separation mechanism also includes a conical water collecting hood fixedly connected to the inner wall of the multi-stage treatment tank, the bottom end of the conical water collecting hood is fixedly connected to a drain pipe, the inner wall of the drain pipe is rotatably connected to a rotating rod, the outer wall of the rotating rod is fixedly connected to a water wheel, the inner wall of the drain pipe is fixedly connected to a blocking block, and the blocking block only blocks half of the diameter of the drain pipe.

[0014] Preferably, the adaptive adding component also includes a small gear that is air-tightly rotated and passes through the outer wall of the drain pipe and is fixedly connected at one end of the rotating rod, the inner wall of the multi-stage treatment tank is fixedly connected with a round rod, the outer wall of the round rod is fixedly connected with a large gear that meshes with the small gear, the rotating ball is fixedly sleeved on the outer wall of the round rod, the inner wall of the dosing groove is fixedly connected with an electromagnetic block, the top of the electromagnetic block is fixedly connected with a plastic spring, the other end of the plastic spring is fixedly connected with a permanent magnet block, the permanent magnet block is air-tightly slidably connected to the inner wall of the dosing groove, the outer wall of the rotating ball is provided with an air vent, and the air vent is connected to the inside of the dosing groove, the electromagnetic block is electrically connected with a PLC controller to form an adding circuit, and the permanent magnet block and the electromagnetic block are magnetically attracted to each other.

[0015] Preferably, a detection shell is fixedly connected to the bottom end of the conical water collecting cover, a water outlet is provided on the outer wall of the conical water collecting cover, a first normally closed solenoid valve is arranged inside the water outlet, a drain outlet is provided at the bottom end of the detection shell, a second normally closed solenoid valve is arranged inside the drain outlet, a halogen tungsten lamp and a photoelectric detector are fixedly connected to the inner walls on opposite sides of the detection shell, the electrical signals of the halogen tungsten lamp and the photoelectric detector are connected to a processor and constitute a turbidity detector.

[0016] Preferably, the outer wall of the drain pipe is fixedly connected to a fixed plate, and the fixed plate is rotatably sleeved on the outer wall of the rotating rod, the outer wall of the fixed plate is provided with two symmetrical sliding grooves, the inner walls of the sliding grooves are slidably connected to sliding blocks, the top ends of the two sliding blocks are fixedly connected to arc-shaped clamping blocks, the opposite sides of the two arc-shaped clamping blocks are fixedly connected to flexible wear-resistant pads, the opposite sides of the two flexible wear-resistant pads jointly clamp the rotating rod, the two ends of the arc-shaped clamping blocks are fixedly connected to electromagnetic plates, and the electromagnetic plates in two different arc-shaped clamping blocks are magnetically attracted to each other, the turbidity detector, the electromagnetic plate and the PLC controller are electrically connected to form a regulation loop.

[0017] Preferably, the stirring and cleaning mechanism further comprises a second motor fixedly connected to the bottom end of the multi-stage processing tank, the output end of the second motor is fixedly connected to a rotating shaft, the bottom end of the rotating rod rotates airtightly through the bottom end of the multi-stage processing tank and extends to the outside of the multi-stage processing tank, and a belt transmission assembly is connected between the rotating rod and the rotating shaft;

[0018] The top of the rotating rod is provided with a cross groove, the bottom of the cross groove is provided with a placement groove, the inner wall of the cross groove is slidably connected with a cross, the top of the cross is fixedly connected with a connecting column, the outer wall of the connecting column is fixedly connected with a stirring sheet, the interior of the plurality of stirring plates at the bottom is provided with a ventilation cavity, the outer wall of the stirring plate is provided with an air outlet, and the air outlet is provided with a one-way valve, the top of the connecting column is fixedly connected with a floating plate and a material extraction hood, the connecting column and the cross are jointly provided with a material extraction hole, the material extraction hole is communicated with the material extraction hood, and the placement groove is provided with a plurality of stirring plates at the bottom. A connecting hole connected to the outside world is opened at the axis center, a two-way vacuum pump is fixedly connected to the inner wall of the placement groove, one of the connecting ends of the two-way vacuum pump is connected to the connecting hole, the other connecting end of the two-way vacuum pump is fixedly connected to a telescopic hose, the other end of the telescopic hose is connected to the extraction hole, a diverter ring is fixedly connected to the inner wall of the placement groove, a diverter pipe is fixedly connected between the diverter ring and the telescopic hose, a third normally closed solenoid valve is arranged in the diverter pipe and the telescopic hose, and the diverter ring is connected to the ventilation cavity in the lowest stirring plate.

[0019] Preferably, the bottom end of the multi-stage treatment tank is fixedly connected to a supporting leg, the bottom end of the multi-stage treatment tank is fixedly connected to a liquid pump, the liquid extraction end of the liquid extraction pump is connected to the interior of the multi-stage treatment tank, the output end of the liquid extraction pump is fixedly connected to a discharge pipe, the other end of the discharge pipe is fixedly connected to a biological treatment tank, the PLC controller is connected to the bidirectional vacuum pump, the third normally closed solenoid valve, the second normally closed solenoid valve, the first normally closed solenoid valve, the liquid extraction pump, and the second motor electrical signal to form a total control loop.

[0020] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0021] 1. After the agricultural sewage is discharged into the multi-stage treatment tank through the water inlet, it first rotates at high speed through the centrifugal cylinder in the first-stage separation mechanism to achieve preliminary separation of solids and liquids; the separated liquid enters the conical water collection cover, and part of the sewage enters the detection shell to detect the content of suspended particles. According to the test results, an appropriate amount of flocculant is added to the sewage through the adaptive addition component; after flocculation, the stirring and aeration is carried out by the stirring and cleaning mechanism to accelerate the formation and growth of flocculants, and the flocculated impurities suspended on the surface are extracted, and finally the treated sewage is discharged into the biological treatment tank for subsequent biological treatment. Through this series of continuous multi-stage treatment processes, the sewage treatment effect is improved, and the sewage can be continuously treated in multiple stages, which can effectively purify the sewage in depth.

[0022] 2. The turbidity detector detects the content of suspended particles in the sewage entering the detection shell, and transmits the data to the PLC controller. The PLC controller controls the current passed into the electromagnetic plate according to the data, and then controls the squeezing force of the flexible wear-resistant pad on the rotating rod, affecting the rotation speed of the rotating rod, thereby adjusting the frequency of the dosing slot on the rotating ball and the liquid outlet. Automatically control the amount of flocculant added according to the impurity content in the sewage, without the need for tedious manual operations, reducing manpower and time costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of a cross-sectional three-dimensional structure of the present invention;

[0026] Figure 3 It is a partial three-dimensional structural schematic diagram of the primary separation mechanism of the present invention;

[0027] Figure 4 It is a partial three-dimensional structural schematic diagram of the secondary separation mechanism of the present invention;

[0028] Figure 5 It is a schematic diagram of the three-dimensional structure of the hemispherical liquid outlet tank of the present invention;

[0029] Figure 6 It is a schematic diagram of the internal three-dimensional structure of the detection shell of the present invention;

[0030] Figure 7 It is a schematic diagram of the cross-sectional three-dimensional structure of the drainage pipe of the present invention;

[0031] Figure 8 It is a schematic diagram of a three-dimensional structure of a partial cross section of a rotating ball of the present invention;

[0032] Fig. 9 It is a schematic diagram of a partial cross-sectional three-dimensional structure of the stirring and cleaning mechanism of the present invention;

[0033] Fig.10 It is a partial exploded view of the present invention;

[0034] Fig.11 For the present invention Figure 4 A three-dimensional enlarged view of part A;

[0035] Fig.12 It is a schematic diagram of the three-dimensional structure of the conical water collecting cover of the present invention.

[0036] Figure numerals: 1, multi-stage treatment tank; 2, water inlet; 3, primary separation mechanism; 31, separation cylinder; 32, fixed block; 33, support plate; 34, first motor; 35, extension block; 36, inclined cleaning plate; 4, secondary separation mechanism; 41, conical water collecting cover; 42, drain pipe; 43, rotating rod; 44, water wheel; 45, blocking block; 46, adaptive adding component; 461, rotating ball; 462, dosing tank; 463, medicine tank; 464, hemispherical liquid outlet tank; 465, liquid outlet; 466, small gear; 467, round rod; 468, large gear; 469, electromagnetic block; 4610, plastic spring; 4611, permanent magnet block; 4612, vent; 4613, detection shell; 4614, water outlet; 4615, drain; 46 16. Halogen tungsten lamp; 4617. Photoelectric detector; 4618. Fixed plate; 4619. Sliding groove; 4620. Sliding block; 4621. Arc clamping block; 4622. Flexible wear-resistant pad; 4623. Electromagnetic plate; 5. Stirring and cleaning mechanism; 51. Rotating rod; 52. Stirring plate; 53. Second motor; 54. Rotating shaft; 55. Belt drive assembly; 56. Cross groove; 57. Placement groove; 58. Cross; 59. Connecting column; 510. Stirring blade; 511. Diverter pipe; 512. Air outlet; 513. Floating plate; 514. Extraction cover; 515. Extraction hole; 516. Connecting hole; 517. Two-way vacuum pump; 518. Telescopic hose; 519. Diverter ring; 6. Support leg; 7. Liquid pump; 8. Drain pipe; 9. Biological treatment tank. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0038] The present invention will be further described below in conjunction with the embodiments.

[0039] Example: Refer to Figures 1 to 12 , an agricultural non-point source pollution control device, comprising:

[0040] A multi-stage treatment tank 1, wherein a water inlet 2 is provided at the top of the multi-stage treatment tank 1;

[0041] The primary separation mechanism 3 comprises a separation cylinder 31 for separating larger impurities in sewage, and the separation cylinder 31 is composed of a separation frame and a fine-mesh filter.

[0042] The primary separation mechanism 3 includes a plurality of fixed blocks 32 fixedly connected to the circumference of the inner wall of the multi-stage treatment tank 1, the outer walls of the plurality of fixed blocks 32 are commonly fixedly connected with a support plate 33, the bottom end of the support plate 33 is fixedly connected with a first motor 34, the output end of the first motor 34 is fixedly connected to the bottom end of the separation cylinder 31, and the bottom end of the separation cylinder 31 is rotatably connected to the upper surface of the support plate 33, the inner wall of the multi-stage treatment tank 1 is fixedly connected with an extension block 35, the other end of the extension block 35 is fixedly connected with an inclined cleaning plate 36, and the outer wall of the inclined cleaning plate 36 is in contact with the inner circumferential wall of the fine mesh filter.

[0043] A secondary separation mechanism 4, the secondary separation mechanism 4 includes an adaptive adding component 46 for adding medicine, the adaptive adding component 46 includes a passively rotating rotating ball 461, the outer wall of the rotating ball 461 is provided with a plurality of dosing grooves 462 arranged in a circumferential array, the inner wall of the multi-stage treatment tank 1 is fixedly connected with a medicine box 463, the bottom end of the medicine box 463 is fixedly connected with a hemispherical liquid outlet groove 464, the bottom end of the hemispherical liquid outlet groove 464 is provided with a liquid outlet 465 in airtight contact with the rotating ball 461, and the liquid outlet 465 is intermittently connected with a plurality of dosing grooves 462, wherein the medicine box 463 is filled with flocculant, and the inner wall of the medicine box 463 is fixedly connected with a medicine inlet pipe, and the medicine inlet pipe runs through the multi-stage treatment tank 1 and extends to the outside of the multi-stage treatment tank 1, and medicine can be added to the medicine box 463 through the medicine inlet pipe;

[0044] The secondary separation mechanism 4 also includes a conical water collecting cover 41 fixedly connected to the inner wall of the multi-stage treatment tank 1, the bottom end of the conical water collecting cover 41 is fixedly connected to a drain pipe 42, the inner wall of the drain pipe 42 is rotatably connected to a rotating rod 43, the outer wall of the rotating rod 43 is fixedly connected to a water wheel 44, the inner wall of the drain pipe 42 is fixedly connected to a blocking block 45, and the blocking block 45 only blocks half of the diameter of the drain pipe 42.

[0045] The adaptive adding component 46 also includes a small gear 466 which is rotated airtightly at one end of the rotating rod 43 and penetrates the outer wall of the drain pipe 42 and is fixedly connected. The inner wall of the multi-stage treatment tank 1 is fixedly connected with a round rod 467, and the outer wall of the round rod 467 is fixedly connected with a large gear 468 which meshes with the small gear 466. The rotating ball 461 is fixedly sleeved on the outer wall of the round rod 467. The inner wall of the dosing groove 462 is fixedly connected with an electromagnetic block 469, and the top of the electromagnetic block 469 is fixedly connected with a plastic Spring 4610, the other end of the plastic spring 4610 is fixedly connected to a permanent magnet block 4611, the permanent magnet block 4611 is airtightly slidably connected to the inner wall of the dosing groove 462, the outer wall of the rotating ball 461 is provided with a vent hole 4612, and the vent hole 4612 is connected to the inside of the dosing groove 462, the electromagnetic block 469 is electrically connected to the PLC controller to form an adding circuit, the permanent magnet block 4611 is magnetically attracted to the electromagnetic block 469, and the permanent magnet block is energized in the initial state.

[0046] A detection shell 4613 is fixedly connected to the bottom end of the conical water collecting cover 41, a water outlet 4614 is provided on the outer wall of the conical water collecting cover 41, a first normally closed solenoid valve is arranged inside the water outlet 4614, a drain outlet 4615 is provided at the bottom end of the detection shell 4613, a second normally closed solenoid valve is arranged inside the drain outlet 4615, a halogen tungsten lamp 4616 and a photoelectric detector 4617 are fixedly connected to the inner walls on the opposite sides of the detection shell 4613, the electrical signals of the halogen tungsten lamp 4616 and the photoelectric detector 4617 are connected to a processor and constitute a turbidity detector, wherein the first normally closed solenoid valve is in an open state in the initial state, and the second normally closed solenoid valve is in a closed state.

[0047] The outer wall of the drain pipe 42 is fixedly connected to a fixed plate 4618, and the fixed plate 4618 is rotatably sleeved on the outer wall of the rotating rod 43. The outer wall of the fixed plate 4618 is provided with two symmetrical sliding grooves 4619, and the inner walls of the sliding grooves 4619 are slidably connected to sliding blocks 4620. The tops of the two sliding blocks 4620 are fixedly connected to arc-shaped clamping blocks 4621, and the opposite sides of the two arc-shaped clamping blocks 4621 are fixedly connected to flexible wear-resistant pads 4622. The opposite sides of the two flexible wear-resistant pads 4622 clamp the rotating rod 43 together, and the two ends of the arc-shaped clamping blocks 4621 are fixedly connected to electromagnetic plates 4623, and the electromagnetic plates 4623 in two different arc-shaped clamping blocks 4621 are magnetically attracted to each other. The turbidity detector, the electromagnetic plate 4623 and the PLC controller are electrically connected to form a regulation loop.

[0048] A stirring and cleaning mechanism 5, the stirring and cleaning mechanism 5 comprises a rotating rod 51 rotatably arranged on the inner bottom wall of the multi-stage treatment tank 1, and a plurality of stirring plates 52 are fixedly connected to the outer wall of the rotating rod 51;

[0049] The stirring and cleaning mechanism 5 also includes a second motor 53 fixedly connected to the bottom end of the multi-stage processing tank 1, and the output end of the second motor 53 is fixedly connected to a rotating shaft 54. The bottom end of the rotating rod 51 rotates airtightly through the bottom end of the multi-stage processing tank 1 and extends to the outside of the multi-stage processing tank 1. A belt transmission assembly 55 is connected between the rotating rod 51 and the rotating shaft 54.

[0050] A cross groove 56 is provided at the top of the rotating rod 51, and a placement groove 57 is provided at the bottom of the cross groove 56. A cross 58 is slidably connected to the inner wall of the cross groove 56, and a connecting column 59 is fixedly connected to the top of the cross 58. A stirring sheet 510 is fixedly connected to the outer wall of the connecting column 59. A ventilation cavity is provided inside the multiple stirring plates 52 at the bottom, and an air outlet 512 is provided on the outer wall of the stirring plate 52, and a one-way valve is provided at the air outlet 512. A floating plate 513 and a material extraction cover 514 are fixedly connected to the top of the connecting column 59. The connecting column 59 and the cross 58 jointly form a material extraction hole 515, and the material extraction hole 515 is connected to the material extraction cover 514. A connecting hole 516 communicating with the outside is provided at the axis center of the placement groove 57. A two-way vacuum pump 517 is fixedly connected to the inner wall of the placement groove 57, and one of the connecting ends of the two-way vacuum pump 517 is connected to the connecting hole 516. The two holes 516 are connected, and the other connecting end of the two-way vacuum pump 517 is fixedly connected with a telescopic hose 518, and the other end of the telescopic hose 518 is connected with the extraction hole 515. A diverter ring 519 is fixedly connected to the inner wall of the placement groove 57, and a diverter pipe 511 is fixedly connected between the diverter ring 519 and the telescopic hose 518. A third normally closed solenoid valve is arranged in the diverter pipe 511 and the telescopic hose 518. The diverter ring 519 is connected to the ventilation cavity in the stirring plate 52 at the bottom. The bottom end of the rotating rod 51 is fixedly connected with a collecting box, and the air in the collecting box is pre-filtered. When air is discharged into the sewage, the third normally closed solenoid valve in the diverter pipe 511 is opened, and the third solenoid valve in the telescopic hose 518 is opened. When impurities need to be extracted, the two third normally closed solenoid valves are reversed. The one-way valve can prevent sewage from flowing back into the ventilation cavity.

[0051] The bottom end of the multi-stage treatment tank 1 is fixedly connected to a supporting leg 6, the bottom end of the multi-stage treatment tank 1 is fixedly connected to a liquid pump 7, the liquid extraction end of the liquid pump 7 is connected to the interior of the multi-stage treatment tank 1, the output end of the liquid pump 7 is fixedly connected to a discharge pipe 8, the other end of the discharge pipe 8 is fixedly connected to a biological treatment tank 9, the PLC controller is connected to the electrical signals of the bidirectional vacuum pump 517, the third normally closed solenoid valve, the second normally closed solenoid valve, the first normally closed solenoid valve, the liquid pump 7, and the second motor 53 to form a total control loop.

[0052] The working principle of the present invention is as follows:

[0053] First, the collected agricultural sewage is continuously discharged into the multi-stage treatment tank 1 through the water inlet 2 (the sewage discharged into the multi-stage treatment tank 1 each time is not fixed, but there is an upper limit), and the first motor 34 is started at the same time. The centrifugal cylinder is driven to rotate at a high speed by the first motor 34. The solid particles (such as mud, plant residues, feces, etc.) in the sewage will be thrown to the inner wall of the centrifugal cylinder (i.e., the fine mesh filter) through the high-speed rotation of the centrifugal cylinder, and the relatively clear liquid will pass through the fine mesh filter and flow into the conical water collecting cover 41, thereby realizing the preliminary separation of solids and liquids in the sewage, providing more favorable conditions for the subsequent sewage treatment steps, and at the same time, the impurities in the fine mesh filter are scraped off by the inclined cleaning plate 36 to prevent the accumulation of impurities from affecting sewage filtration.

[0054] Then part of the sewage will enter the detection shell 4613 through the water outlet 4614, and then after a period of time, the first normally closed solenoid valve will be closed, and the halogen tungsten lamp 4616 and the photoelectric detector 4617 will be turned on (after pre-testing at this time, the detection shell 4613 can be filled with sewage), and then the suspended particles in the sewage will be detected by the turbidity detector. The suspended particles will scatter and absorb light. The turbidity detector uses this principle to indirectly reflect the content of suspended particles by measuring the transmittance or scattering degree of light in sewage. After the detection is completed, the second normally closed solenoid valve is controlled to open by the PLC controller, so that the sewage is discharged into the bottom of the multi-stage treatment tank 1 through the drain port 4615.

[0055] Then, the data of the detected suspended matter particle content is transmitted to the PLC controller through the processor, and the current passing through the electromagnetic plate 4623 is controlled by the PLC controller. When there are more suspended matter particles, the current passing through the electromagnetic plate 4623 is smaller, and vice versa, the current passing through the electromagnetic plate 4623 is larger. The reasons are as follows:

[0056] By electrifying the electromagnetic plate 4623, the electromagnetic plates 4623 on both sides are attracted to each other, so that the rotating rod 43 is squeezed by the two flexible wear-resistant pads 4622, and the sewage in the conical water collecting cover 41 will be discharged into the drain pipe 42. The water wheel 44 drives the rotating rod 43 to rotate through the continuous impact of the water flow and gravity, and the small gear 466 is driven to rotate through the rotating rod 43, and then the large gear 468 is driven to rotate through the small gear 466, so that the rotating ball 461 rotates, and the multiple dosing grooves 462 on the rotating ball 461 are intermittently connected with the liquid outlet 465, so that the flocculant in the dosing box will enter the dosing groove 462, and the flocculant in the dosing groove 462 will flow into the sewage in the multi-stage treatment tank 1 through the rotation of the rotating ball 461;

[0057] When there are more suspended particles in the sewage, less current is passed through the electromagnetic plate 4623, so the squeezing of the rotating rod 43 is smaller, so the rotating rod 43 rotates faster, so more flocculants are discharged into the sewage, otherwise less flocculants are discharged into the sewage;

[0058] The reasons are as follows:

[0059] When there are many suspended particles: the current passed through the electromagnetic plate 4623 is small, the magnetic field force generated is weak, the electromagnetic plates 4623 on both sides squeeze the rotating rod 43 less, and the friction force on the rotating rod 43 is small. Under the impact of water flow and gravity on the water wheel 44, it is easier to rotate and the rotation speed will be accelerated. Since the rotating rod 43 drives the small gear 466 to rotate, the small gear 466 drives the large gear 468 to rotate, and then the rotating ball 461 rotates, the dosing groove 462 on the rotating ball 461 is intermittently connected with the liquid outlet 465. The fast rotation speed of the rotating rod 43 will increase the frequency of the dosing groove 462 communicating with the liquid outlet 465, and the flocculant in the dosing box enters the dosing groove 462 more times, and more flocculant is discharged into the sewage.

[0060] When there are fewer suspended particles: the current passing through the electromagnetic plate 4623 is larger, the magnetic field force generated by the electromagnetic plate 4623 is stronger, the squeezing force on the rotating rod 43 is greater, and the friction force on the rotating rod 43 is greater. This causes the rotating rod 43 to encounter greater resistance when it rotates under the drive of the water wheel 44, and the rotation speed slows down. The rotation speed of the rotating ball 461 also slows down, the frequency of communication between the dosing tank 462 and the liquid outlet 465 decreases, the flocculant entering the dosing tank 462 is reduced, and the flocculant discharged into the sewage is also less.

[0061] When the sewage is discharged, the electromagnetic block 469 needs to be powered off through the PLC controller, and then the elastic potential energy of the plastic spring 4610 is used to make the permanent magnetic plate bounce upward, so that the flocculant in the dosing tank 462 is ejected and then falls into the sewage. The reason is that the flocculant in the upward dosing tank 462 cannot flow out automatically and needs to be ejected assisted. When there is a dosing tank 462 connected to the drug outlet, the flocculant in the dosing tank 462 is not considered (the reason is that the flocculant content in one dosing tank 462 is within the normal error range);

[0062] After the flocculant is discharged into the sewage (i.e. 1 minute after the sewage is discharged), the buoyancy will cause the float plate 513 and the extraction hood 514 to float on the water surface, and then the second motor 53 is started by the PLC controller, and the second motor 53 drives the rotating rod 51, the stirring plate 52, the connecting column 59, the stirring sheet 510, the float plate 513, and the extraction hood 514 to rotate synchronously, and the rotation speed is relatively slow to prevent affecting the flocculation process.

[0063] At the same time, the two-way vacuum pump 517 is started. The two-way vacuum pump 517 discharges air into the diverter ring 519 through the connecting hole 516, and then discharges air into the sewage through the air outlet 512, thereby generating bubbles. The bubbles will interact with the suspended particles and flocculants in the sewage during the rising process, increase the probability of collision between particles, and make the suspended particles more easily combine with the flocculants, thereby accelerating the formation and growth of flocculants and improving the flocculation effect. After the flocculation is completed (it is a pre-test, the flocculation time when the multi-stage treatment tank 1 has the most sewage), the two-way vacuum pump 517 is reversed, and then the flocculated impurities suspended on the sewage surface are extracted through the extraction hood 514, and then discharged through the connecting hole 516, and then the liquid extraction pump 7 is started to extract the treated sewage in the multi-stage treatment tank 1, and then discharge it into the biological treatment tank 9, and then biological treatment is carried out, and then multi-stage treatment is carried out.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An agricultural non-point source pollution control device, characterized in that: include: A multi-stage treatment tank (1), wherein a water inlet (2) is provided at the top of the multi-stage treatment tank (1); A primary separation mechanism (3), the primary separation mechanism (3) comprising a separation cylinder (31) for separating larger impurities in sewage, the separation cylinder (31) comprising a separation frame and a fine-mesh filter; A secondary separation mechanism (4), the secondary separation mechanism (4) comprising an adaptive adding component (46) for adding a medicine, the adaptive adding component (46) comprising a passively rotating rotating ball (461), the outer wall of the rotating ball (461) being provided with a plurality of medicine adding grooves (462) arranged in a circumferential array, the inner wall of the multi-stage treatment tank (1) being fixedly connected with a medicine liquid box (463), the bottom end of the medicine liquid box (463) being fixedly connected with a hemispherical liquid outlet groove (464), the bottom end of the hemispherical liquid outlet groove (464) being provided with a liquid outlet (465) in airtight contact with the rotating ball (461), and the liquid outlet (465) being intermittently connected with the plurality of medicine adding grooves (462) respectively; A stirring and cleaning mechanism (5), the stirring and cleaning mechanism (5) comprising a rotating rod (51) rotatably arranged on the inner bottom wall of the multi-stage processing tank (1), and a plurality of stirring plates (52) are fixedly connected to the outer wall of the rotating rod (51).

2. The agricultural non-point source pollution control device according to claim 1 is characterized in that: The primary separation mechanism (3) comprises a plurality of fixed blocks (32) fixedly connected to the circumference of the inner wall of the multi-stage treatment tank (1); the outer walls of the plurality of fixed blocks (32) are commonly fixedly connected to a support plate (33); the bottom end of the support plate (33) is fixedly connected to a first motor (34); the output end of the first motor (34) is fixedly connected to the bottom end of the separation cylinder (31); and the bottom end of the separation cylinder (31) is rotatably connected to the upper surface of the support plate (33); the inner wall of the multi-stage treatment tank (1) is fixedly connected to an extension block (35); the other end of the extension block (35) is fixedly connected to an inclined cleaning plate (36); the outer wall of the inclined cleaning plate (36) is in contact with the inner circumferential wall of the fine-mesh filter.

3. The agricultural non-point source pollution control device according to claim 1, characterized in that: The secondary separation mechanism (4) further comprises a conical water collecting hood (41) fixedly connected to the inner wall of the multi-stage treatment tank (1); the bottom end of the conical water collecting hood (41) is fixedly connected to a drain pipe (42); the inner wall of the drain pipe (42) is rotatably connected to a rotating rod (43); the outer wall of the rotating rod (43) is fixedly connected to a water wheel (44); the inner wall of the drain pipe (42) is fixedly connected to a blocking block (45); and the blocking block (45) only blocks half of the diameter of the drain pipe (42).

4. The agricultural non-point source pollution control device according to claim 3 is characterized in that: The adaptive adding component (46) further comprises a pinion (466) which is fixedly connected to the outer wall of the drain pipe (42) and rotates airtightly at one end of the rotating rod (43); a round rod (467) is fixedly connected to the inner wall of the multi-stage treatment tank (1); a large gear (468) which meshes with the pinion (466) is fixedly connected to the outer wall of the round rod (467); the rotating ball (461) is fixedly sleeved on the outer wall of the round rod (467); an electromagnetic block (469) is fixedly connected to the inner wall of the dosing tank (462); and the electromagnetic block (469) The top end of the rotating ball (461) is fixedly connected to a plastic spring (4610), the other end of the plastic spring (4610) is fixedly connected to a permanent magnet block (4611), the permanent magnet block (4611) is airtightly slidably connected to the inner wall of the dosing tank (462), the outer wall of the rotating ball (461) is provided with an air vent (4612), and the air vent (4612) is connected to the inside of the dosing tank (462), the electromagnetic block (469) is electrically connected to a PLC controller to form a dosing loop, and the permanent magnet block (4611) and the electromagnetic block (469) are magnetically attracted to each other.

5. The agricultural non-point source pollution control device according to claim 4 is characterized in that: The bottom end of the conical water collecting cover (41) is fixedly connected to a detection shell (4613); the outer wall of the conical water collecting cover (41) is provided with a water outlet (4614); a first normally closed solenoid valve is arranged inside the water outlet (4614); the bottom end of the detection shell (4613) is provided with a drain outlet (4615); a second normally closed solenoid valve is arranged inside the drain outlet (4615); a halogen tungsten lamp (4616) and a photoelectric detector (4617) are respectively fixedly connected to the inner wall on the opposite side of the detection shell (4613); the halogen tungsten lamp (4616) and the photoelectric detector (4617) are electrically connected to a processor and constitute a turbidity detector.

6. The agricultural non-point source pollution control device according to claim 5, characterized in that: The outer wall of the drain pipe (42) is fixedly connected to a fixing plate (4618), and the fixing plate (4618) is rotatably sleeved on the outer wall of the rotating rod (43). The outer wall of the fixing plate (4618) is provided with two symmetrical sliding grooves (4619). The inner walls of the sliding grooves (4619) are slidably connected to sliding blocks (4620). The top ends of the two sliding blocks (4620) are fixedly connected to arc-shaped clamping blocks (4621). The two arc-shaped clamping blocks (4621) are fixedly connected to the outer wall of the rotating rod (43). The two sides of the arc-shaped clamping blocks (4621) are fixedly connected to flexible wear-resistant pads (4622), the two sides of the two flexible wear-resistant pads (4622) jointly clamp the rotating rod (43), the two ends of the arc-shaped clamping blocks (4621) are fixedly connected to electromagnetic plates (4623), and the electromagnetic plates (4623) in two different arc-shaped clamping blocks (4621) are magnetically attracted to each other, and the turbidity detector, the electromagnetic plates (4623) and the PLC controller are electrically connected to form a regulation loop.

7. The agricultural non-point source pollution control device according to claim 1, characterized in that: The stirring and cleaning mechanism (5) further comprises a second motor (53) fixedly connected to the bottom end of the multi-stage processing tank (1); the output end of the second motor (53) is fixedly connected to a rotating shaft (54); the bottom end of the rotating rod (51) rotates and airtightly penetrates the bottom end of the multi-stage processing tank (1) and extends to the outside of the multi-stage processing tank (1); a belt transmission assembly (55) is transmission-connected between the rotating rod (51) and the rotating shaft (54); A cross groove (56) is provided at the top end of the rotating rod (51), a placement groove (57) is provided at the bottom end of the cross groove (56), a cross (58) is slidably connected to the inner wall of the cross groove (56), a connecting column (59) is fixedly connected to the top end of the cross (58), an agitating sheet (510) is fixedly connected to the outer wall of the connecting column (59), a ventilation cavity is provided inside the plurality of stirring plates (52) at the bottom, an air outlet (512) is provided on the outer wall of the stirring plate (52), and a one-way valve is provided at the air outlet (512), a floating plate (513) and a material extraction cover (514) are fixedly connected to the top end of the connecting column (59), a material extraction hole (515) is provided on the connecting column (59) and the cross (58), the material extraction hole (515) is connected to the material extraction cover (514), and the placement groove (57) is provided on the inner wall of the connecting column (59), and the material extraction hole (515) is connected to the material extraction cover (514). A connecting hole (516) communicating with the outside is provided at the axis center of the placement groove (57); a two-way vacuum pump (517) is fixedly connected to the inner wall of the placement groove (57); one of the connecting ends of the two-way vacuum pump (517) is connected to the connecting hole (516); the other connecting end of the two-way vacuum pump (517) is fixedly connected to a telescopic hose (518); the other end of the telescopic hose (518) is connected to the extraction hole (515); a diverter ring (519) is fixedly connected to the inner wall of the placement groove (57); a diverter pipe (511) is fixedly connected between the diverter ring (519) and the telescopic hose (518); a third normally closed solenoid valve is provided in the diverter pipe (511) and the telescopic hose (518); the diverter ring (519) is connected to the ventilation cavity in the stirring plate (52) at the bottom.

8. The agricultural non-point source pollution control device according to claim 6, characterized in that: The bottom end of the multi-stage treatment tank (1) is fixedly connected to a support leg (6), the bottom end of the multi-stage treatment tank (1) is fixedly connected to a liquid pump (7), the liquid pumping end of the liquid pump (7) is connected to the interior of the multi-stage treatment tank (1), the output end of the liquid pump (7) is fixedly connected to a liquid discharge pipe (8), the other end of the liquid discharge pipe (8) is fixedly connected to a biological treatment tank (9), and the PLC controller is electrically signal-connected to the bidirectional vacuum pump (517), the third normally closed solenoid valve, the second normally closed solenoid valve, the first normally closed solenoid valve, the liquid pump (7), and the second motor (53) to form a master control loop.

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