Landfill leachate pretreatment equipment

Abstract

The landfill leachate pretreatment equipment comprises a treatment barrel, a mounting plate is fixedly connected to the side wall of the treatment barrel, a coagulant storage tank and a variable pump are fixedly connected to the upper side of the mounting plate, and the input end and the output end of the variable pump are fixedly connected with a connecting pipe and a liquid supply pipe correspondingly; one end of the connecting pipe extends into the coagulant storage tank, one end of the liquid supply pipe penetrates through the side wall of the treatment barrel and extends into the treatment barrel, a fixing plate is fixedly connected to the side wall of the upper end of the treatment barrel, and a connecting plate is fixedly connected to the upper side of the fixing plate. According to the device, landfill leachate pretreatment processes such as impurity filtration, coagulating sedimentation and ammonia stripping can be completed in one device, the whole device is more convenient to place and assemble, and the pretreatment effect of the landfill leachate is improved by dynamically regulating and controlling the stripping process and the coagulating sedimentation process in the landfill leachate pretreatment.

Description

Technical Field

[0001] The invention relates to the technical field of garbage treatment, and in particular to garbage leachate pretreatment equipment. Background Art

[0002] Landfill leachate is a liquid with high concentration of organic or inorganic components produced by biochemical degradation such as compaction and fermentation during the garbage stacking and landfilling process, as well as the seepage of precipitation and groundwater. We call it landfill leachate, also known as leachate. There are many factors that affect the generation of leachate, mainly the rainfall in the garbage stacking and landfilling area, the nature and composition of the garbage, the anti-seepage treatment of the landfill, and the hydrogeological conditions of the site.

[0003] The treatment process of landfill leachate needs to go through pretreatment, biological treatment and deep treatment. The pretreatment of landfill leachate is mainly to remove coarse suspended matter in the leachate, reduce the ammonia nitrogen concentration in the leachate, and create favorable conditions for subsequent treatment processes.

[0004] The pretreatment of landfill leachate generally requires the completion of processes such as impurity filtration, coagulation and sedimentation, and ammonia stripping in multiple devices. During use, the liquid needs to be continuously transferred within the equipment, which increases the cost of pipelines required for liquid transportation. In addition, the entire set of equipment includes multiple devices, which are not compact enough as a whole and are inconvenient to place and assemble. Summary of the invention

[0005] The present invention provides a landfill leachate pretreatment device to solve the problems raised in the above background technology.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A landfill leachate pretreatment device comprises a treatment barrel, a mounting plate is fixedly connected to the side wall of the treatment barrel, a coagulant storage tank and a variable pump are fixedly connected on the upper side of the mounting plate, an input end and an output end of the variable pump are fixedly connected to a connecting pipe and a liquid supply pipe respectively, one end of the connecting pipe extends into the interior of the coagulant storage tank, one end of the liquid supply pipe penetrates the side wall of the treatment barrel and extends into the interior of the treatment barrel, a fixing plate is fixedly connected to the upper side of the fixing plate, a connecting plate is fixedly connected to the upper end of the connecting plate, a conical air cylinder is fixedly connected to the upper end of the conical air cylinder, a U-shaped tube is fixedly connected to the upper end of the conical air cylinder, one end of the U-shaped tube is rotatably connected to a rotating tube through a pipeline bearing, the U-shaped tube is connected to the rotating tube, an electric heating wire is arranged in one end of the U-shaped tube close to the conical air cylinder, and a A temperature sensor is provided, a servo motor is fixedly connected to the upper side of the fixed plate, a second gear is fixedly connected to the output shaft of the servo motor, a rotating shaft is fixedly connected to the upper side of the second gear, a fan blade is fixedly connected to the upper end of the rotating shaft, the fan blade is located in a conical wind tube, a first gear is meshedly connected to the side wall of the second gear, the first gear is fixedly connected to the side wall of a rotating tube, the rotating tube is located in a processing barrel, two exhaust pipes are fixedly connected to the bottom end of the rotating tube, the two exhaust pipes are connected to the rotating tube, a plurality of exhaust holes are provided on the side wall of each exhaust pipe, a guide pipe is fixedly connected to the bottom side wall of the processing barrel, the guide pipe is connected to the processing barrel, a valve is provided on the guide pipe, an adsorption and impurity removal device is provided below the guide pipe, a turbidity sensor and an ammonia nitrogen concentration sensor are provided on the inner side wall of the processing barrel;

[0008] It also includes a control mechanism, which is used to control and treat the landfill leachate by air stripping process and coagulation and sedimentation process, so as to improve the pretreatment effect of the landfill leachate;

[0009] The control mechanism includes a control module, a detection module, and a processing module;

[0010] The control module is connected with the variable pump, the servo motor and the heating wire by electrical signals;

[0011] The detection module includes a temperature detection unit for detecting the temperature of the stripping airflow of the landfill leachate, a turbidity detection unit for detecting the turbidity of the landfill leachate, and an ammonia nitrogen concentration detection unit for detecting the liquid ammonia nitrogen concentration of the landfill leachate;

[0012] The processing module includes an evaluation unit and a judgment unit.

[0013] Preferably, the adsorption and impurity removal device includes a separation barrel, two support columns are fixedly connected to the upper side of the separation barrel, the two support columns are fixedly connected to the bottom side wall of the processing barrel, a grid plate is fixedly connected inside the separation barrel, a sponge layer is provided on the upper side of the grid plate, and a drain pipe is fixedly connected to the bottom side wall of the separation barrel.

[0014] Preferably, an inclined filter screen is fixedly connected to the top side wall of the processing barrel, the rotating tube passes through the central side wall of the filter screen, a discharge port and a reflux filter screen are provided on the side wall of the processing barrel, the discharge port and the reflux filter screen are respectively located on the upper and lower sides of the bottom end of the filter screen, and a storage box is fixedly connected to the outer side wall of the processing barrel, and the discharge port and the reflux filter screen are both located in the storage box.

[0015] Preferably, liquid coagulant is stored in the coagulant storage tank.

[0016] Preferably, the temperature detection unit, the turbidity detection unit, and the ammonia nitrogen concentration detection unit are respectively a temperature sensor, a turbidity sensor, and an ammonia nitrogen concentration sensor.

[0017] Preferably, the control module controls the power of the servo motor to control the flow rate of the stripping airflow, and the efficiency of reducing the ammonia nitrogen concentration in the leachate can be controlled by controlling the flow rate of the stripping airflow.

[0018] Preferably, the control module controls the temperature of the stripping airflow by controlling the power of the electric heating wire. The hot airflow at a certain temperature can improve the air stripping effect of the landfill leachate and improve the effect of reducing the ammonia nitrogen concentration in the leachate.

[0019] Preferably, the use steps of the landfill leachate pretreatment equipment are:

[0020] In the first step, the leachate to be pre-treated can be put into the treatment barrel from above. The filter net can intercept the larger debris in the leachate. The intercepted debris will slide along the filter net through the discharge port and fall into the storage box for collection. The remaining leachate will fall into the treatment barrel for storage.

[0021] The second step is to start the variable pump, servo motor and heating wire at the same time;

[0022] The variable pump can continuously and stably transport the liquid coagulant in the coagulant storage tank to the treatment barrel through the connecting pipe and the liquid supply pipe. The liquid coagulant can settle the flocs formed by a large amount of suspended matter in the landfill leachate to the bottom, reducing the turbidity of the landfill leachate. The control module can control the flow rate of adding the liquid coagulant to the treatment barrel by controlling the power of the variable pump. Therefore, the turbidity of the landfill leachate can be controlled by controlling the power of the variable pump.

[0023] The exhaust hole is started, and the exhaust hole can drive the rotating tube to rotate through the second gear and the first gear. The rotation of the rotating tube can drive the two exhaust pipes to stir in the liquid coagulant. The rotation of the second gear can also drive the fan blades to rotate in the conical wind tube through the rotating shaft. The rotation of the conical wind tube can compress the external air along the conical wind tube and enter the U-shaped tube. When the airflow passes through the U-shaped tube, the electric heating wire in the U-shaped tube can heat the air. The temperature sensor is used to detect the temperature of the air discharged from the U-shaped tube. After that, the hot airflow discharged from the U-shaped tube flows out from the multiple exhaust holes through the rotating tube and the two exhaust pipes, and air is blown into the landfill leachate. The blowing of air can make the ammonia nitrogen in the landfill leachate escape in the form of gas, thereby reducing the ammonia nitrogen concentration in the leachate;

[0024] In the third step, when the turbidity and ammonia nitrogen concentration of the garbage leachate in the treatment barrel are detected by the turbidity sensor and the ammonia nitrogen concentration sensor to be lower than the corresponding first preset threshold value, the valve is opened to allow the garbage leachate after stripping and coagulation sedimentation to flow from the diversion pipe to the sponge layer. The sponge layer can absorb the floccules in the garbage leachate, so that the pretreated garbage leachate finally passes through the sponge layer and falls into the separation barrel, and is discharged from the drain pipe at the bottom of the separation barrel to enter the subsequent treatment process, thereby completing the pretreatment of the garbage leachate;

[0025] Step 4: When the treatment barrel is stripping and coagulating and settling, the temperature detection unit, turbidity detection unit, and ammonia nitrogen concentration detection unit in the detection module are used to detect the stripping air flow temperature, turbidity, and ammonia nitrogen concentration of the landfill leachate, respectively, to form air flow temperature T, turbidity K, and ammonia nitrogen concentration M;

[0026] The fifth step is to summarize the acquired air flow temperature T, turbidity K, and ammonia nitrogen concentration M to form the detection condition information, build a data model and optimize the training, and perform regression analysis on the acquired air flow temperature T, turbidity K, and ammonia nitrogen concentration M through the analysis software to obtain the influence of air flow temperature T, turbidity K, and ammonia nitrogen concentration M on the pretreatment effect of landfill leachate, and output the air flow temperature influencing factor At, turbidity influencing factor Ak, and ammonia nitrogen concentration influencing factor Am;

[0027] In the sixth step, the evaluation unit obtains the air flow temperature T, turbidity K, and ammonia nitrogen concentration M, and performs dimensionless processing on them to form a control coefficient YCL. The correlation model is:

[0028]

[0029] Among them, At represents the vibration frequency influence factor, 0.37≤At≤0.65; Ak represents the pressure influence factor, 0.45≤Ak≤0.67; Am represents the solidification degree influence factor, 0.28≤Am≤0.75;

[0030] In the seventh step, the obtained control coefficient YCL is transmitted to the judgment unit for comparison with the preset second preset threshold. If the control coefficient YCL is not within the range of the second preset threshold, a corresponding control instruction is generated to adjust the power of the variable pump, servo motor, and heating wire. At the same time, the control coefficient YCL continues to be evaluated until the control coefficient YCL is within the second preset threshold, thereby ensuring the pretreatment effect of the stripping and coagulation sedimentation of the leachate.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention has a compact structure and can complete landfill leachate pretreatment processes such as impurity filtration, coagulation and sedimentation, and ammonia stripping in one device. The overall placement and assembly of the device are more convenient, and the pretreatment effect of the landfill leachate is improved by dynamically regulating the stripping process and the coagulation and sedimentation process in the landfill leachate pretreatment.

[0033] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0035] Figure 1 A schematic diagram of the three-dimensional structure of a landfill leachate pretreatment device proposed by the present invention;

[0036] Figure 2 This is a schematic diagram of a front cross-sectional structure of a landfill leachate pretreatment device proposed by the present invention;

[0037] Figure 3 It is a schematic diagram of the bottom structure of the rotating tube in the present invention;

[0038] Figure 4 for Figure 2 A is a schematic diagram of the partially enlarged structure of the middle part;

[0039] Figure 5 for Figure 2 Schematic diagram of the partially enlarged structure of B.

[0040] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0041] 1. Coagulant storage tank; 2. Connecting pipe; 3. Variable pump; 4. Mounting plate; 5. Filter screen; 6. Processing barrel; 7. Guide pipe; 8. Sponge layer; 9. Drain pipe; 10. Separation barrel; 11. Support column; 12. Valve; 13. Storage box; 14. Reflux filter screen; 15. Discharge port; 16. Fixed plate; 17. Connecting plate; 18. Conical air duct; 19. U-shaped pipe; 20. Pipe bearing; 21. Rotating pipe; 22. First gear; 23. Liquid supply pipe; 24. Turbidity sensor; 25. Ammonia nitrogen concentration sensor; 26. Temperature sensor; 27. Grille plate; 28. Exhaust pipe; 29. ​​Exhaust hole; 30. Second gear; 31. Servo motor; 32. Rotating shaft; 33. Fan blade; 34. Heating wire. DETAILED DESCRIPTION

[0042] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail by way of example with reference to the accompanying drawings in the following paragraphs. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0043] See also Figure 1 to Figure 5 In an embodiment of the present invention, a landfill leachate pretreatment device comprises a treatment barrel 6, a filter screen 5 arranged in an inclined manner is fixedly connected to the top side wall of the treatment barrel 6, a discharge port 15 and a reflux filter screen 14 are arranged on the side wall of the treatment barrel 6, the discharge port 15 and the reflux filter screen 14 are respectively located at the upper and lower sides of the bottom end of the filter screen 5, a storage box 13 is fixedly connected to the outer side wall of the treatment barrel 6, and the discharge port 15 and the reflux filter screen 14 are both located in the storage box 13;

[0044] A mounting plate 4 is fixedly connected to the side wall of the treatment barrel 6, and a coagulant storage tank 1 and a variable pump 3 are fixedly connected to the upper side of the mounting plate 4. Liquid coagulant is stored in the coagulant storage tank 1, and the input end and output end of the variable pump 3 are respectively fixedly connected to a connecting pipe 2 and a liquid supply pipe 23, one end of the connecting pipe 2 extends into the interior of the coagulant storage tank 1, and one end of the liquid supply pipe 23 penetrates the side wall of the treatment barrel 6 and extends into the interior of the treatment barrel 6;

[0045] The upper side wall of the treatment barrel 6 is fixedly connected with a fixed plate 16, and an L-shaped connecting plate 17 is fixedly connected to the upper side of the fixed plate 16. The upper end of the connecting plate 17 is fixedly connected with a conical air cylinder 18, and the upper end of the conical air cylinder 18 is fixedly connected with a U-shaped tube 19. One end of the U-shaped tube 19 is rotatably connected with a rotating tube 21 through a pipeline bearing 20. The rotating tube 21 passes through the central side wall of the filter screen 5. The U-shaped tube 19 is connected to the rotating tube 21. An electric heating wire 34 is provided in one end of the U-shaped tube 19 close to the conical air cylinder 18, and a temperature sensor 26 is provided in one end of the U-shaped tube 19 close to the rotating tube 21. A servo motor 31 is fixedly connected to the upper side of the fixed plate 16, and the output shaft of the servo motor 31 is fixedly connected to the upper side of the fixed plate 16. A second gear 30 is fixedly connected, a rotating shaft 32 is fixedly connected to the upper side of the second gear 30, a fan blade 33 is fixedly connected to the upper end of the rotating shaft 32, and the fan blade 33 is located in the conical wind tube 18. The side wall of the second gear 30 is meshedly connected with the first gear 22, and the first gear 22 is fixedly connected to the side wall of the rotating tube 21. The rotating tube 21 is located in the processing barrel 6. The bottom end of the rotating tube 21 is fixedly connected to two exhaust pipes 28, and the two exhaust pipes 28 are connected to the rotating tube 21. A plurality of exhaust holes 29 are opened on the side wall of each exhaust pipe 28. A guide pipe 7 is fixedly connected to the bottom side wall of the processing barrel 6. The guide pipe 7 is connected to the processing barrel 6, and a valve 12 is provided on the guide pipe 7;

[0046] An adsorption impurity removal device is provided below the guide pipe 7, and the adsorption impurity removal device includes a separation barrel 10, and two support columns 11 are fixedly connected to the upper side of the separation barrel 10, and the two support columns 11 are fixedly connected to the bottom side wall of the processing barrel 6, and a grid plate 27 is fixedly connected inside the separation barrel 10, and a sponge layer 8 is provided on the upper side of the grid plate 27, and a drainage pipe 9 is fixedly connected to the bottom side wall of the separation barrel 10, and a turbidity sensor 24 and an ammonia nitrogen concentration sensor 25 are provided on the inner side wall of the processing barrel 6;

[0047] It also includes a control mechanism, which is used to control and treat the landfill leachate through a stripping process and a coagulation and sedimentation process to improve the pretreatment effect of the landfill leachate;

[0048] The control mechanism includes a control module, a detection module, and a processing module;

[0049] The control module is connected with the variable pump 3, the servo motor 31 and the heating wire 34 by electrical signals;

[0050] The detection module includes a temperature detection unit for detecting the temperature of the stripping airflow of the landfill leachate, a turbidity detection unit for detecting the turbidity of the landfill leachate, and an ammonia nitrogen concentration detection unit for detecting the concentration of liquid ammonia nitrogen in the landfill leachate; the temperature detection unit, the turbidity detection unit, and the ammonia nitrogen concentration detection unit are respectively a temperature sensor 26, a turbidity sensor 24, and an ammonia nitrogen concentration sensor 25;

[0051] The processing module includes an evaluation unit and a judgment unit.

[0052] Specifically, the speed of the servo motor 31 is controlled by the power. The speed of the servo motor 31 can control the flow rate of the airflow generated by the rotation of the fan blades 33. Therefore, the control module controls the power of the servo motor 31 to control the flow rate of the stripping airflow. The flow rate of the stripping airflow can affect the escape rate of ammonia nitrogen in the landfill leachate in the form of gas. Then, by controlling the flow rate of the stripping airflow, the efficiency of reducing the ammonia nitrogen concentration in the leachate can be controlled.

[0053] The control module controls the temperature of the stripping airflow by controlling the power of the electric heating wire 34. The hot airflow at a certain temperature can improve the air stripping effect of the landfill leachate and improve the effect of reducing the ammonia nitrogen concentration in the leachate.

[0054] The use steps of the landfill leachate pretreatment equipment are:

[0055] In the first step, the landfill leachate to be pre-treated can be put into the treatment barrel 6, and the filter 5 can intercept the larger debris in the landfill leachate. The intercepted debris will slide along the filter 5 and pass through the discharge port 15, and then fall into the storage box 13 for collection. The remaining landfill leachate will fall into the treatment barrel 6 for storage;

[0056] The second step is to start the variable displacement pump 3, the servo motor 31 and the heating wire 34 simultaneously;

[0057] The variable pump 3 can continuously and stably transport the liquid coagulant in the coagulant storage tank 1 to the processing barrel 6 through the connecting pipe 2 and the liquid supply pipe 23. The liquid coagulant can settle the flocs formed by a large amount of suspended matter in the landfill leachate to the bottom, thereby reducing the turbidity of the landfill leachate. The control module can control the flow rate of adding the liquid coagulant to the processing barrel 6 by controlling the power of the variable pump 3, so the turbidity of the landfill leachate can be controlled by controlling the power of the variable pump 3.

[0058] The servo motor 31 is started. The servo motor 31 can drive the rotating tube 21 to rotate through the second gear 30 and the first gear 22. The rotation of the rotating tube 21 can drive the two exhaust pipes 28 to stir in the liquid coagulant. The rotation of the second gear 30 can drive the fan blades 33 to rotate in the conical wind tube 18 through the rotating shaft 32. The rotation of the conical wind tube 18 can compress the external air along the conical wind tube 18 and enter the U-shaped tube 19. When the airflow passes through the U-shaped tube 19, the electric heating wire 34 in the U-shaped tube 19 can heat the air. The temperature sensor 26 is used to detect the temperature of the air discharged from the U-shaped tube 19. After that, the hot airflow discharged from the U-shaped tube 19 flows out from the multiple exhaust holes 29 through the rotating tube 21 and the two exhaust pipes 28, and blows air into the landfill leachate. The blowing of air can make the ammonia nitrogen in the landfill leachate escape in the form of gas, thereby reducing the ammonia nitrogen concentration in the leachate;

[0059] In the third step, when the turbidity and ammonia nitrogen concentration of the landfill leachate in the treatment barrel 6 are detected by the turbidity sensor 24 and the ammonia nitrogen concentration sensor 25 to be lower than the corresponding first preset threshold value, the valve 12 is opened to allow the landfill leachate after stripping and coagulation sedimentation to flow from the guide pipe 7 to the sponge layer 8. The sponge layer 8 can absorb the floccules in the landfill leachate, so that the landfill leachate finally pre-treated passes through the sponge layer 8 and falls into the separation barrel 10, and is discharged from the drain pipe 9 at the bottom of the separation barrel 10 to enter the subsequent treatment process, thereby completing the pre-treatment of the landfill leachate;

[0060] In the fourth step, when the stripping and coagulation sedimentation treatment is performed in the treatment barrel 6, the stripping airflow temperature, the turbidity of the landfill leachate, and the ammonia nitrogen concentration of the landfill leachate are respectively detected by the temperature detection unit, the turbidity detection unit, and the ammonia nitrogen concentration detection unit in the detection module to form the airflow temperature T, the turbidity K, and the ammonia nitrogen concentration M;

[0061] The fifth step is to summarize the acquired air flow temperature T, turbidity K, and ammonia nitrogen concentration M to form the detection condition information, build a data model and optimize the training, and perform regression analysis on the acquired air flow temperature T, turbidity K, and ammonia nitrogen concentration M through the analysis software to obtain the influence of air flow temperature T, turbidity K, and ammonia nitrogen concentration M on the pretreatment effect of landfill leachate, and output the air flow temperature influencing factor At, turbidity influencing factor Ak, and ammonia nitrogen concentration influencing factor Am;

[0062] In the sixth step, the evaluation unit obtains the air flow temperature T, turbidity K, and ammonia nitrogen concentration M, and performs dimensionless processing on them to form a control coefficient YCL. The correlation model is:

[0063]

[0064] Among them, At represents the vibration frequency influence factor, 0.37≤At≤0.65; Ak represents the pressure influence factor, 0.45≤Ak≤0.67; Am represents the solidification degree influence factor, 0.28≤Am≤0.75;

[0065] In the seventh step, the acquired control coefficient YCL is transmitted to the judgment unit for comparison with the preset second preset threshold value. If the control coefficient YCL is not within the range of the second preset threshold value, a corresponding control instruction is generated to adjust the power of the variable pump 3, the servo motor 31, and the heating wire 34. At the same time, the control coefficient YCL is continuously evaluated until the control coefficient YCL is within the second preset threshold value, thereby ensuring the pretreatment effect of the stripping and coagulation sedimentation of the leachate.

[0066] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A landfill leachate pretreatment device, comprising a treatment barrel (6), characterized in that: A mounting plate (4) is fixedly connected to the side wall of the treatment barrel (6); a coagulant storage tank (1) and a variable pump (3) are fixedly connected to the upper side of the mounting plate (4); the input end and the output end of the variable pump (3) are respectively fixedly connected to a connecting pipe (2) and a liquid supply pipe (23); one end of the connecting pipe (2) extends into the interior of the coagulant storage tank (1); one end of the liquid supply pipe (23) penetrates the side wall of the treatment barrel (6) and extends into the interior of the treatment barrel (6); a fixing plate (16) is fixedly connected to the upper side wall of the treatment barrel (6); and the fixing plate (16) is fixedly connected to the upper side wall of the treatment barrel (6); 6), a connecting plate (17) is fixedly connected to the upper side of the connecting plate (17), a conical air cylinder (18) is fixedly connected to the upper end of the conical air cylinder (18), a U-shaped tube (19) is fixedly connected to the upper end of the conical air cylinder (18), one end of the U-shaped tube (19) is rotatably connected to a rotating tube (21) through a pipeline bearing (20), the U-shaped tube (19) is connected to the rotating tube (21), an electric heating wire (34) is provided in one end of the U-shaped tube (19) close to the conical air cylinder (18), a temperature sensor (26) is provided in one end of the U-shaped tube (19) close to the rotating tube (21), and the fixed A servo motor (31) is fixedly connected to the upper side of the plate (16); the output shaft of the servo motor (31) is fixedly connected to a second gear (30); the upper side of the second gear (30) is fixedly connected to a rotating shaft (32); the upper end of the rotating shaft (32) is fixedly connected to a fan blade (33); the fan blade (33) is located in the conical wind tube (18); the side wall of the second gear (30) is meshedly connected to a first gear (22); the first gear (22) is fixedly connected to the side wall of a rotating tube (21); the rotating tube (21) is located in the processing barrel (6); The bottom end of the rotating tube (21) is fixedly connected to two exhaust pipes (28), the two exhaust pipes (28) are in communication with the rotating tube (21), a plurality of exhaust holes (29) are provided on the side wall of each exhaust pipe (28), a guide pipe (7) is fixedly connected to the bottom side wall of the processing barrel (6), the guide pipe (7) is in communication with the processing barrel (6), a valve (12) is provided on the guide pipe (7), an adsorption and impurity removal device is provided below the guide pipe (7), and a turbidity sensor (24) and an ammonia nitrogen concentration sensor (25) are provided on the inner side wall of the processing barrel (6); It also includes a control mechanism, which is used to control and treat the landfill leachate by air stripping process and coagulation and sedimentation process, so as to improve the pretreatment effect of the landfill leachate; The control mechanism includes a control module, a detection module, and a processing module; The control module is connected to the variable displacement pump (3), the servo motor (31), and the heating wire (34) via electrical signals; The detection module includes a temperature detection unit for detecting the temperature of the stripping airflow of the landfill leachate, a turbidity detection unit for detecting the turbidity of the landfill leachate, and an ammonia nitrogen concentration detection unit for detecting the liquid ammonia nitrogen concentration of the landfill leachate; The processing module includes an evaluation unit and a judgment unit.

2. The landfill leachate pretreatment equipment according to claim 1, characterized in that: The adsorption impurity removal device comprises a separation barrel (10), two support columns (11) are fixedly connected to the upper side of the separation barrel (10), the two support columns (11) are fixedly connected to the bottom side wall of the processing barrel (6), a grid plate (27) is fixedly connected inside the separation barrel (10), a sponge layer (8) is provided on the upper side of the grid plate (27), and a drainage pipe (9) is fixedly connected to the bottom side wall of the separation barrel (10).

3. The landfill leachate pretreatment equipment according to claim 2, characterized in that: A filter screen (5) arranged in an inclined manner is fixedly connected to the top side wall of the processing barrel (6); the rotating tube (21) passes through the central side wall of the filter screen (5); a discharge port (15) and a return filter screen (14) are provided on the side wall of the processing barrel (6); the discharge port (15) and the return filter screen (14) are respectively located at the upper and lower sides of the bottom end of the filter screen (5); a storage box (13) is fixedly connected to the outer side wall of the processing barrel (6); the discharge port (15) and the return filter screen (14) are both located in the storage box (13).

4. The landfill leachate pretreatment equipment according to claim 3, characterized in that: The coagulant storage tank (1) stores liquid coagulant.

5. The landfill leachate pretreatment equipment according to claim 4, characterized in that: The temperature detection unit, the turbidity detection unit, and the ammonia nitrogen concentration detection unit are respectively a temperature sensor (26), a turbidity sensor (24), and an ammonia nitrogen concentration sensor (25).

6. The landfill leachate pretreatment equipment according to claim 5, characterized in that: The control module controls the power of the servo motor (31) to control the flow rate of the stripping airflow. By controlling the flow rate of the stripping airflow, the efficiency of reducing the ammonia nitrogen concentration in the leachate can be controlled.

7. The landfill leachate pretreatment equipment according to claim 6, characterized in that: The control module controls the temperature of the stripping airflow by controlling the power of the electric heating wire (34). The hot airflow at a certain temperature can improve the air stripping effect of the landfill leachate and improve the effect of reducing the ammonia nitrogen concentration in the leachate.

8. The landfill leachate pretreatment equipment according to claim 7, characterized in that: The use steps of the landfill leachate pretreatment equipment are: In the first step, the landfill leachate to be pre-treated can be put into the treatment barrel (6) from above, and the filter net (5) can intercept the larger debris in the landfill leachate. The intercepted debris will slide along the filter net (5) through the discharge port (15) and fall into the storage box (13) for collection. The remaining landfill leachate will fall into the treatment barrel (6) for storage; The second step is to start the variable displacement pump (3), the servo motor (31) and the heating wire (34) simultaneously; The variable pump (3) can continuously and stably transport the liquid coagulant in the coagulant storage tank (1) to the processing barrel (6) through the connecting pipe (2) and the liquid supply pipe (23). The liquid coagulant can settle flocs formed by a large amount of suspended matter in the landfill leachate to the bottom, thereby reducing the turbidity of the landfill leachate. The control module can control the flow rate of adding the liquid coagulant to the processing barrel (6) by controlling the power of the variable pump (3). Therefore, the turbidity of the landfill leachate can be controlled by controlling the power of the variable pump (3). The servo motor (31) is started. The servo motor (31) can drive the rotating tube (21) to rotate through the second gear (30) and the first gear (22). The rotation of the rotating tube (21) can drive the two exhaust pipes (28) to stir in the liquid coagulant. The rotation of the second gear (30) can also drive the fan blades (33) to rotate in the conical wind tube (18) through the rotating shaft (32). The rotation of the conical wind tube (18) can compress the external air along the conical wind tube (18) and enter the U-shaped tube (19). When the airflow passes through the U-shaped tube (19), the electric heating wire (34) in the U-shaped tube (19) can heat the air, and the temperature sensor (26) is used to detect the temperature of the air discharged from the U-shaped tube (19). Then, the hot airflow discharged from the U-shaped tube (19) passes through the rotating tube (21) and the two exhaust pipes (28) and flows out from the multiple exhaust holes (29), and blows air into the landfill leachate. The blowing of air can make the ammonia nitrogen in the landfill leachate escape in the form of gas, thereby reducing the ammonia nitrogen concentration in the leachate; In the third step, when the turbidity and ammonia nitrogen concentration of the landfill leachate in the treatment barrel (6) are detected by the turbidity sensor (24) and the ammonia nitrogen concentration sensor (25) to be lower than the corresponding first preset threshold value, the valve (12) is opened to allow the landfill leachate after stripping and coagulation sedimentation treatment to flow from the guide pipe (7) to the sponge layer (8). The sponge layer (8) can absorb the floccules in the landfill leachate, so that the landfill leachate that has been pretreated finally passes through the sponge layer (8) and falls into the separation barrel (10), and is discharged from the drain pipe (9) at the bottom of the separation barrel (10) to enter the subsequent treatment process, thereby completing the pretreatment of the landfill leachate; Step 4: When the stripping and coagulation sedimentation treatment is performed in the treatment barrel (6), the stripping airflow temperature, the turbidity of the landfill leachate, and the ammonia nitrogen concentration of the landfill leachate are respectively detected by the temperature detection unit, the turbidity detection unit, and the ammonia nitrogen concentration detection unit in the detection module to form the airflow temperature T, the turbidity K, and the ammonia nitrogen concentration M; The fifth step is to summarize the acquired air flow temperature T, turbidity K, and ammonia nitrogen concentration M to form the detection condition information, build a data model and optimize the training, and perform regression analysis on the acquired air flow temperature T, turbidity K, and ammonia nitrogen concentration M through the analysis software to obtain the influence of air flow temperature T, turbidity K, and ammonia nitrogen concentration M on the pretreatment effect of landfill leachate, and output the air flow temperature influencing factor At, turbidity influencing factor Ak, and ammonia nitrogen concentration influencing factor Am; In the sixth step, the evaluation unit obtains the air flow temperature T, turbidity K, and ammonia nitrogen concentration M, and performs dimensionless processing on them to form a control coefficient YCL. The correlation model is: Among them, At represents the vibration frequency influence factor, 0.37≤At≤0.65; Ak represents the pressure influence factor, 0.45≤Ak≤0.67; Am represents the solidification degree influence factor, 0.28≤Am≤0.75; In the seventh step, the obtained control coefficient YCL is transmitted to the judgment unit for comparison with the preset second preset threshold value. If the control coefficient YCL is not within the range of the second preset threshold value, a corresponding control instruction is generated to control the power of the variable pump (3), the servo motor (31), and the heating wire (34). At the same time, the control coefficient YCL is continuously evaluated until the control coefficient YCL is within the second preset threshold value, thereby ensuring the pretreatment effect of the stripping and coagulation sedimentation of the landfill leachate.

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