Denitrification device for landfill leachate treatment

Abstract

The invention relates to the technical field of sewage treatment, in particular to a denitrification device for landfill leachate treatment, and provides the following scheme aiming at the defects that in the prior art, a denitrification device is poor in liquid mixing uniformity, consequently, the contact efficiency of denitrifying bacteria and pollutants is low, and automatic cleaning is not convenient. The denitration device comprises a denitration box, a feeding port is fixedly formed in the right side of the denitration box, a plurality of discharging ports are fixedly formed in the front side of the denitration box, and first one-way valves are fixedly mounted on the inner walls of the feeding port and the discharging ports; the ORP sensor is arranged on the inner wall of the rear side of the denitrification box, and a NO3 <-> sensor, a temperature sensor and a fluorescence method DO sensor are arranged on the inner wall of the rear side of the denitrification box; the protection plates are fixedly mounted on the inner walls of the left side and the right side of the denitration box; according to the device, the liquid mixing uniformity is conveniently improved, so that the contact efficiency of denitrifying bacteria and pollutants is improved, and automatic cleaning is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, in particular to a denitrification device for landfill leachate treatment. BACKGROUND

[0002] Denitrification, also known as nitrogen removal, is a biochemical process in which bacteria reduce nitrogen (N) in nitrate (NO3-) to nitrogen gas (N2) through a series of intermediates (NO2-, NO, N2O). The bacteria involved in this process are collectively known as denitrifying bacteria and are commonly used in wastewater treatment processes and landfill leachate treatment. The denitrification device in landfill leachate treatment is a special equipment for removing nitrate nitrogen (NO3-N) in wastewater. Its core function is to reduce nitrate to nitrogen gas (N2) through microbial metabolism, achieving the goal of denitrification.

[0003] The patent document with publication number CN217025675U discloses a denitrification device for landfill leachate treatment, which includes a main housing one, a main housing two fixedly installed at the bottom of the main housing one, a door body fixedly installed on the surface of the main housing one, an inlet hopper fixedly installed at the top of the main housing one, and a separation bin opened in the interior of the main housing one. The top end of the interior of the separation bin is fixedly installed with an installation plate through bolts. Through reasonable structure design, the liquid in the nitrification tank is more uniformly stirred, denitrification is more sufficient, and sedimentation is reduced, so that the device as a whole can better treat landfill leachate when in use. A mechanical transmission mechanism is arranged in the interior of the device, and the centrifugal force generated by the spiral separation fan blades separates landfill leachate and other solid impurities, achieving the effect of solid-liquid separation. Not only can solid impurities be effectively filtered and collected, but also the subsequent stirring and sedimentation work is more convenient.

[0004] However, the liquid mixing uniformity of the above-mentioned denitrification device for landfill leachate treatment is poor, which leads to low contact efficiency of denitrifying bacteria and pollutants, and automatic cleaning is not convenient. SUMMARY

[0005] The purpose of the present application is to solve the problem of poor liquid mixing uniformity of the existing denitrification device, which leads to low contact efficiency of denitrifying bacteria and pollutants, and automatic cleaning is not convenient. A denitrification device for landfill leachate treatment is proposed.

[0006] The denitrification device for landfill leachate treatment provided by the present application adopts the following technical solution: A denitrification device for landfill leachate treatment, comprising: A denitrification tank, a feed inlet is fixedly installed on the right side of the denitrification tank, a plurality of discharge ports are fixedly installed on the front side of the denitrification tank, and a first one-way valve is fixedly installed on the inner wall of the feed inlet and the plurality of discharge ports. The ORP sensor is arranged on the inner wall of the rear side of the denitrification tank, and the inner wall of the rear side of the denitrification tank is provided with a NO3- sensor, a temperature sensor and a fluorescent DO sensor; The protective plate is fixedly installed on the inner walls of the left and right sides of the denitrification tank; The reciprocating assembly is arranged on the left and right sides of the protective plate, and the reciprocating assembly is used for stirring the denitrification tank; The stirring assembly is arranged on the reciprocating assembly, and the stirring assembly is used for fully contacting the denitrification bacteria and the pollutants; The cleaning assembly is arranged on the rear side of the denitrification tank, and the cleaning assembly is used for cleaning the ORP sensor, the NO3- sensor, the temperature sensor and the fluorescent DO sensor.

[0007] Further, the reciprocating assembly includes a reciprocating screw rod, which is rotatably installed on the left and right sides of the protective plate, a moving block is threadedly connected to the reciprocating screw rod, the moving block is slidably installed at the bottom of the protective plate, and a driving motor is arranged on the left side of the denitrification tank, and the output shaft of the driving motor is fixedly connected to the left end of the reciprocating screw rod.

[0008] By adopting the above technical scheme, the driving motor drives the reciprocating screw rod to rotate, and the moving block at the bottom end of the reciprocating screw rod reciprocates.

[0009] Further, a second rotating shaft is rotatably installed at the bottom of the moving block, a spiral plate is fixedly installed on the outer wall of the second rotating shaft, a first rolling bearing is fixedly sleeved on the outer wall of the second rotating shaft, an annular storage tank is fixedly installed on the outer wall of the first rolling bearing, a plurality of nozzles are fixedly installed on the outer wall of the annular storage tank, a first conveying pipe is fixedly installed at the top of the annular storage tank, and a first mounting plate is fixedly installed on the rear side of the denitrification tank.

[0010] By adopting the above technical scheme, the moving block drives the second rotating shaft to reciprocate as a whole, the second rotating shaft drives the spiral plate to reciprocate, the second rotating shaft drives the first rolling bearing to reciprocate, the first rolling bearing drives the annular storage tank to reciprocate, the annular storage tank synchronously drives the nozzles and the first conveying pipe to reciprocate, the cleaning agent is conveyed into the annular storage tank through the first conveying pipe, and the plurality of nozzles are used for flushing.

[0011] Further, the cleaning assembly includes a water bucket, and the water bucket is fixedly installed on the first mounting plate, an injection port is fixedly installed at the top of the water bucket, and a water pump is fixedly installed at the top of the water bucket.

[0012] Further, the output end of the water pump is fixedly installed with a same hose at the top end of the first conveying pipe, and the top of the water bucket is fixedly installed with a second conveying pipe, and the input end of the water pump is fixedly installed with a same third conveying pipe at the top end of the second conveying pipe.

[0013] Further, the top of the water bucket is rotatably installed with a first rotating shaft at the middle position, and a plurality of first stirring plates are fixedly installed on the outer wall of the first rotating shaft, the bottom end of the second rotating shaft is fixedly installed with a scraper, the scraper is in contact with the inner wall of the bottom of the denitrification tank, and two second rolling bearings are fixedly sleeved on the outer wall of the second rotating shaft.

[0014] By adopting the above technical scheme, the rotation of the plurality of first stirring plates at the bottom end of the first rotating shaft can stir and mix the cleaning agent and water in the water bucket, and the rotation of the scraper driven by the second rotating shaft can clean the inner wall of the bottom of the denitrification tank.

[0015] Further, the stirring assembly comprises a support frame, and the support frame is fixedly installed on the outer wall of the two second rolling bearings, a first bevel gear is fixedly sleeved on the outer wall of the second rotating shaft, and the first bevel gear is engaged with two second bevel gears, a first transmission shaft is fixedly installed on each of the two second bevel gears, and the two first transmission shafts are rotatably installed on the support frame, a plurality of second stirring plates are fixedly installed on the outer wall of the two first transmission shafts, and a support plate is fixedly installed on the bottom front side of the protective plate.

[0016] By adopting the above technical scheme, the rotation of the first bevel gear driven by the second rotating shaft can synchronously rotate the two second bevel gears, the synchronous rotation of the two second bevel gears can synchronously rotate the two first transmission shafts, and the synchronous rotation of the two first transmission shafts can synchronously rotate the plurality of second stirring plates.

[0017] Further, a rack is fixedly installed on the rear side of the support plate, and a gear is engaged with the rack, and the gear is fixedly sleeved on the outer wall of the second rotating shaft.

[0018] By adopting the above technical scheme, the rack can drive the gear to rotate through the engagement transmission of the rack and the gear, the gear can drive the second rotating shaft to rotate.

[0019] Further, a second mounting plate is fixedly installed on the top of the water bucket, a second transmission shaft is rotatably installed on the second mounting plate, a third bevel gear is fixedly installed on the right end of the second transmission shaft, the third bevel gear is engaged with a fourth bevel gear, and the fourth bevel gear is fixedly installed at the top end of the first rotating shaft.

[0020] By adopting the above technical scheme, the rotation of the third bevel gear driven by the second transmission shaft can drive the fourth bevel gear to rotate, and the rotation of the fourth bevel gear can drive the first rotating shaft to rotate.

[0021] Further, the outer wall of the output shaft of the driving motor is fixedly sleeved with a first sprocket, the first sprocket is engaged with a chain, the chain is engaged with a second sprocket, and the second sprocket is fixedly sleeved on the outer wall of the second transmission shaft.

[0022] By adopting the above technical scheme, the driving motor drives the first sprocket to rotate, the first sprocket drives the second sprocket to rotate through the chain, and the second sprocket drives the second transmission shaft to rotate.

[0023] To sum up, the present application has at least one of the following beneficial technical effects: 1. The first bevel gear can be driven to rotate by the second rotating shaft, the two second bevel gears are synchronously driven to rotate by the first bevel gear, the two first transmission shafts are synchronously driven to rotate by the two second bevel gears, and the plurality of second stirring plates are synchronously driven to rotate by the two first transmission shafts, so that the left-right direction and the vertical direction can be simultaneously stirred and mixed, the liquid mixing uniformity is improved, and the contact efficiency of denitrifying bacteria and pollutants is improved; 2. The water pump can be started to convey the mixed cleaning agent in the water bucket into the annular storage tank through the first conveying pipe, the hose, the second conveying pipe and the third conveying pipe, the annular storage tank drives the spray head and the first conveying pipe to reciprocate, the spray head is used for flushing the ORP sensor, the NO3- sensor, the temperature sensor and the fluorescence DO sensor, and the scraper is used for cleaning the bottom inner wall of the denitrification tank. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a front view structural schematic diagram of a denitrification device for landfill leachate treatment in Embodiment One of the present application; Figure 2 is a side view structural schematic diagram of a denitrification device for landfill leachate treatment in Embodiment One of the present application; Figure 3 is a rear view structural schematic diagram of a denitrification device for landfill leachate treatment in Embodiment One of the present application; Figure 4 is a rear view side view structural schematic diagram of a denitrification device for landfill leachate treatment in Embodiment One of the present application; Figure 5 is a rear view side view sectional view structural schematic diagram of a denitrification device for landfill leachate treatment in Embodiment One of the present application; Figure 6 is a side view sectional view structural schematic diagram of a denitrification device for landfill leachate treatment in Embodiment One of the present application; Figure 7 is a front view sectional view structural schematic diagram of a denitrification device for landfill leachate treatment in Embodiment One of the present application; Figure 8is a front side view of a reverse denitrification device for landfill leachate treatment according to an embodiment of the present application; Figure 9 is a structure diagram of a stirring assembly of the reverse denitrification device for landfill leachate treatment according to an embodiment of the present application; Figure 10 is a sectional view of a reverse denitrification tank of the reverse denitrification device for landfill leachate treatment according to an embodiment of the present application; Figure 11 is a structure diagram of a chain wheel and chain transmission of the reverse denitrification device for landfill leachate treatment according to an embodiment of the present application; Figure 12 is a structure diagram of a gear and rack of the reverse denitrification device for landfill leachate treatment according to an embodiment of the present application; Figure 13 is a partial sectional view of the stirring assembly of the reverse denitrification device for landfill leachate treatment according to an embodiment of the present application; Figure 14 is an enlarged diagram of part A in Figure 13 Figure 15 is an enlarged diagram of part B in Figure 3

[0025] Reference signs: 1, reverse denitrification tank; 2, feeding inlet; 3, discharging outlet; 4, ORP sensor; 5, NO3- sensor; 6, temperature sensor; 7, fluorescence DO sensor; 8, protection plate; 9, reciprocating screw rod; 10, moving block; 11, mounting box; 12, driving motor; 13, second rotating shaft; 14, first rolling bearing; 15, annular storage tank; 16, first conveying pipe; 17, first mounting plate; 18, water bucket; 19, injection inlet; 20, water pump; 21, hose; 22, second conveying pipe; 23, third conveying pipe; 24, first rotating shaft; 25, first stirring plate; 26, scraper; 27, second rolling bearing; 28, support frame; 29, first bevel gear; 30, second bevel gear; 31, first transmission shaft; 32, second stirring plate; 33, support plate; 34, rack; 35, gear; 36, second mounting plate; 37, second transmission shaft; 38, third bevel gear; 39, fourth bevel gear; 40, first sprocket; 41, chain; 42, second sprocket. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0027] Embodiment I Refer to Figures 1-15 ​​The utility model relates to a kind of denitrification devices for landfill leachate treatment, comprising: The right side of the denitrification box 1 is provided with a feeding hole, and a feeding port 2 is fixedly installed on the inner wall of the feeding hole. A plurality of discharge holes are formed on the front side of the denitrification box 1, and a discharge port 3 is fixedly installed on the inner wall of the discharge hole. First check valves are fixedly installed on the inner walls of the feeding port 2 and the plurality of discharge ports 3. A first through hole is formed on the left side of the denitrification box 1. A solar power supply module is arranged on the top of the denitrification box 1 to facilitate power supply. Filtering plates are slidably installed on the inner walls of the plurality of discharge ports 3. A push rod motor is fixedly installed on the front inner wall of the denitrification box 1. The output shaft of the push rod motor is fixedly connected with the filtering plate. ‌An ORP sensor 4 is arranged on the rear inner wall of the denitrification box 1. A NO3- sensor 5, a temperature sensor 6, and a fluorescent DO sensor 7 are arranged on the rear inner wall of the denitrification box 1. The control range of the fluorescent DO sensor 7 is 0.5-1.5 mg / L. Protective plates 8 are fixedly installed on the inner walls of the left and right sides of the denitrification box 1. A sliding groove is formed on the bottom of each protective plate 8. A second through hole is formed on the left side of each protective plate 8, corresponding to the first through hole. A reciprocating assembly is arranged on the inner walls of the left and right sides of the sliding groove. A stirring assembly is arranged on the reciprocating assembly. A cleaning assembly is arranged on the rear side of the denitrification box 1.

[0028] Specifically, the reciprocating assembly includes a reciprocating screw rod 9, which is rotatably installed on the inner walls of the first through hole and the second through hole. A moving block 10 is threadedly connected to the reciprocating screw rod 9. The moving block 10 is slidably installed on the inner wall of the sliding groove. An installation box 11 is fixedly installed on the left side of the denitrification box 1. A drive motor 12 is fixedly installed on the inner wall of the installation box 11. The output shaft of the drive motor 12 is fixedly connected with the left end of the reciprocating screw rod 9.

[0029] Specifically, a second rotating shaft 13 is rotatably installed on the bottom of the moving block 10. A spiral plate is fixedly arranged on the outer wall of the second rotating shaft 13. A first rolling bearing 14 is fixedly sleeved on the outer wall of the second rotating shaft 13. An annular storage box 15 is fixedly installed on the outer wall of the first rolling bearing 14. A plurality of third through holes are formed on the outer wall of the annular storage box 15. Spray heads are fixedly installed on the inner walls of the third through holes. A fourth through hole is formed on the top of the annular storage box 15. A first conveying pipe 16 is fixedly installed on the inner wall of the fourth through hole. A first mounting plate 17 is fixedly installed on the rear side of the denitrification box 1. A gas pump is arranged on the outer wall of the second rotating shaft 13. A gas pipe is fixedly installed on the gas outlet of the gas pump. A second check valve is fixedly installed on the inner wall of the gas pipe. The gas pipe is in contact with the surfaces of the ORP sensor 4, the NO3- sensor 5, the temperature sensor 6, and the fluorescent DO sensor 7.

[0030] Specifically, the cleaning assembly comprises a water bucket 18, and the water bucket 18 is fixedly installed on the first mounting plate 17, the top of the water bucket 18 is provided with an injection hole, and the inner wall of the injection hole is fixedly installed with an injection port 19; the top of the water bucket 18 is provided with a fifth through hole, and the top of the water bucket 18 is fixedly installed with a water pump 20.

[0031] Specifically, the output end of the water pump 20 and the top end of the first conveying pipe 16 are fixedly installed with a same hose 21, the inner wall of the fifth through hole is fixedly installed with a second conveying pipe 22, and the input end of the water pump 20 and the top end of the second conveying pipe 22 are fixedly installed with a same third conveying pipe 23.

[0032] Specifically, the top of the water bucket 18 and the middle position are provided with a sixth through hole, the inner wall of the sixth through hole is rotatably installed with a first rotating shaft 24, the outer wall of the first rotating shaft 24 is fixedly installed with a plurality of first stirring plates 25, the bottom end of the second rotating shaft 13 is fixedly installed with a scraper 26, the scraper 26 is in contact with the inner wall of the bottom of the denitrification tank 1, and the outer wall of the second rotating shaft 13 is fixedly sleeved with two second rolling bearings 27.

[0033] Specifically, the stirring assembly comprises a support frame 28, and the support frame 28 is fixedly installed on the outer walls of the two second rolling bearings 27; the outer wall of the second rotating shaft 13 is fixedly sleeved with a first bevel gear 29, the first bevel gear 29 is engaged with two second bevel gears 30, the two second bevel gears 30 are fixedly installed with a first transmission shaft 31, and the two first transmission shafts 31 are rotatably installed on the support frame 28; the outer walls of the two first transmission shafts 31 are fixedly installed with a plurality of second stirring plates 32, and the bottom of the front side of the protective plate 8 is fixedly installed with a support plate 33.

[0034] Specifically, the rear side of the support plate 33 is fixedly installed with a rack 34, the rack 34 is engaged with a gear 35, and the gear 35 is fixedly sleeved on the outer wall of the second rotating shaft 13.

[0035] Specifically, the top of the water bucket 18 is fixedly installed with a second mounting plate 36, the second mounting plate 36 is rotatably installed with a second transmission shaft 37, the right end of the second transmission shaft 37 is fixedly installed with a third bevel gear 38, the third bevel gear 38 is engaged with a fourth bevel gear 39, the fourth bevel gear 39 is fixedly installed on the top end of the first rotating shaft 24, and the stirring speed is 20-30 rpm.

[0036] Specifically, the output shaft of the driving motor 12 is fixedly sleeved with a first sprocket 40, the first sprocket 40 is engaged with a chain 41, the chain 41 is engaged with a second sprocket 42, and the second sprocket 42 is fixedly sleeved on the outer wall of the second transmission shaft 37.

[0037] The implementation principle of the denitrification device for treating landfill leachate provided by the embodiment of the application is as follows: when in use, contaminated water is injected into the denitrification tank 1 through the inlet 2, and a cleaning agent and water are injected into the bucket 18 through the injection port 19, the cleaning agent being NaOH with a concentration of 0.5%-1%. At this time, the driving motor 12 is started, the driving motor 12 drives the reciprocating screw rod 9 to rotate, the reciprocating screw rod 9 drives the bottom moving block 10 to reciprocate, the moving block 10 drives the second rotating shaft 13 to reciprocate as a whole, the second rotating shaft 13 drives the first rolling bearing 14, the two second rolling bearings 27, the first bevel gear 29, the spiral plate, the air pump, the second one-way valve and the air pipe to reciprocate synchronously, the first rolling bearing 14 drives the annular storage tank 15 to reciprocate, the annular storage tank 15 drives the spray head and the first conveying pipe 16 to reciprocate, so that the contaminated water at different positions in the denitrification tank 1 can be stirred and mixed conveniently, meanwhile, the two second rolling bearings 27 drive the same support frame 28 to move as a whole, the support frame 28 drives the two first transmission shafts 31 to reciprocate synchronously, the two first transmission shafts 31 drive the plurality of second stirring plates 32 and the two second bevel gears 30 to reciprocate synchronously, the gear rack 34 drives the gear 35 to rotate through meshing transmission, the gear 35 drives the second rotating shaft 13 to rotate in opposite directions, the second rotating shaft 13 drives the first bevel gear 29 to rotate in opposite directions, the first bevel gear 29 drives the two second bevel gears 30 to rotate in opposite directions synchronously, the two second bevel gears 30 drive the two first transmission shafts 31 to rotate in opposite directions synchronously, the two first transmission shafts 31 drive the plurality of second stirring plates 32 to rotate in opposite directions synchronously, meanwhile, the second rotating shaft 13 drives the spiral plate to rotate in opposite directions, so that the sludge that is deposited on the inner wall of the bottom of the denitrification tank 1 due to gravity can be turned over, the stirring effect is improved, the contaminated water can be stirred and mixed in the left-right direction and the vertical direction at the same time, the liquid mixing uniformity is improved, and the contact efficiency of denitrifying bacteria and pollutants is improved, meanwhile, the second rotating shaft 13 drives the scraper 26, the air pump, the second one-way valve and the air pipe to rotate in opposite directions synchronously, the bottom of the denitrification tank 1 is stirred through the scraper 26, meanwhile, the driving motor 12 drives the first sprocket 40 to rotate, the first sprocket 40 drives the second sprocket 42 to rotate through the chain 41, the second sprocket 42 drives the second transmission shaft 37 to rotate, the second transmission shaft 37 drives the third bevel gear 38 to rotate, the third bevel gear 38 drives the fourth bevel gear 39 to rotate, the fourth bevel gear 39 drives the first rotating shaft 24 to rotate, the first rotating shaft 24 drives the plurality of first stirring plates 25 at the bottom end to rotate, so that the cleaning agent and water in the bucket 18 are stirred and mixed, the ORP sensor 4 reflects the system electron transfer capacity through measurement of the oxidation-reduction potential ORP, and indirectly indicates the denitrification process. When the ORP value is lower than -100 mV, it indicates that the denitrifying bacteria activity is strong and the carbon source is sufficient; if the ORP value is higher than -50 mV, the carbon source needs to be supplemented, the NO3- sensor 5 directly detects the nitrate concentration, and the change of NO3-N is monitored in real time through an electrochemical method such as a Pt / NiO electrode reaction.Pt electrode occurs reduction reaction O2+4e⁻→2O²⁻, NiO electrode occurs oxidation reaction NO+O²⁻→NO2+2e⁻, real-time monitoring of denitrification process is carried out by using ORP sensor 4 oxidation reduction potential and NO3- sensor 5, and the amount of carbon source such as sodium acetate is dynamically adjusted by PID algorithm to avoid excess or deficiency. When NO3- concentration > 20 mg / L and ORP > 0 mV, the carbon source utilization rate can be increased by more than 30%, the anoxic environment is monitored in real time by using fluorescent DO sensor 7 (range 0-20 mg / L, accuracy ±0.1 mg / L), Pt / NiO electrode type NO3- sensor 5 (detection limit 0.5 mg / L) realizes dynamic monitoring of nitrate by oxidation reduction reaction, ORP sensor 4 (-500~+500 mV), when ORP <-100 mV, the amount of carbon source is automatically reduced, the sensor data is processed by using PID algorithm, when NO3- concentration > 20 mg / L and ORP > 0 mV, sodium acetate is quantitatively added by the nozzle of the annular storage tank 15 (control accuracy is ±2 mL), the carbon source utilization rate is 92%, after the treatment is completed, the first one-way valve in the multiple discharge ports 3 is opened, the carbon source is added in excess is avoided by using DO-ORP combined control strategy, the sludge is blocked by using multiple filter plates, at this time, the treated water is discharged, when it is necessary to clean the denitrification tank 1, the water pump 20 is started, the water pump 20 transports the mixed cleaning agent in the water bucket 18 to the annular storage tank 15 through the first conveying pipe 16, hose 21, second conveying pipe 22 and third conveying pipe 23, at the same time, the annular storage tank 15 drives the nozzle and the first conveying pipe 16 to move back and forth, the ORP sensor 4, NO3- sensor 5, temperature sensor 6 and fluorescent DO sensor 7 are washed by the nozzle, at the same time, the air pump is started, at this time, the second one-way valve is opened, the surface of the ORP sensor 4, NO3- sensor 5, temperature sensor 6 and fluorescent DO sensor 7 is further cleaned by the air pipe, the cleaning efficiency is improved, the bottom inner wall of the denitrification tank 1 is cleaned by the scraper 26, at this time, multiple push rod motors are started, multiple push rod motors drive multiple filter plates to move vertically, multiple discharge ports 3 are opened by multiple filter plates, and dirt is discharged through multiple discharge ports 3.

[0038] Example two The difference between the present embodiment and embodiment one is that an ultrasonic vibration cleaning machine (frequency of 40 kHz, power of 50 W) and a self-cleaning electrode Ag / AgCl reference electrode are arranged on the inner wall of the denitrification tank 1, the ultrasonic vibration cleaning machine is close to the surface of the sensor, the ultrasonic vibration cleaning machine is started once every 8 hours, the proportional coefficient Kp of the PID algorithm is 0.8, the integral time Ti is 120 s, the biological membrane on the surface of the sensor can be removed (the signal recovery rate after cleaning is >95%) through the ultrasonic vibration cleaning machine and the self-cleaning electrode Ag / AgCl reference electrode, the ORP sensor 4-100 mV threshold and the NO3-sensor 5 Pt / NiO electrode are prevented from being covered by the colloid and microbial membrane in the leachate, and signal drift is avoided; The cleaning agent realizes directional flushing through the water pump 20 and the spray head, and cooperates with the mechanical scraping of the scraper 26, so that the maintenance period is extended to 30 days.

[0039] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A denitrification device for landfill leachate treatment, characterized in that: include: A denitrification box (1) has an inlet (2) fixedly installed on the right side and multiple outlets (3) fixedly installed on the front side of the denitrification box (1). A first check valve is fixedly installed on the inner wall of the inlet (2) and the multiple outlets (3). The ORP sensor (4) is installed on the rear inner wall of the denitrification box (1), and the rear inner wall of the denitrification box (1) is provided with a NO3- sensor (5), a temperature sensor (6) and a fluorescence DO sensor (7). Protective plates (8) are fixedly installed on the inner walls of the left and right sides of the denitrification box (1); Reciprocating components are disposed on the left and right sides of the protective plate (8); A stirring component is disposed on the reciprocating component; The cleaning assembly is located on the rear side of the denitrification box (1).

2. The denitrification device for landfill leachate treatment according to claim 1, characterized in that: The reciprocating assembly includes a reciprocating screw (9), which is rotatably mounted on the left and right sides of the protective plate (8). A moving block (10) is threaded onto the reciprocating screw (9), and the moving block (10) is slidably mounted on the bottom of the protective plate (8). A drive motor (12) is provided on the left side of the denitrification box (1), and the output shaft of the drive motor (12) is fixedly connected to the left end of the reciprocating screw (9).

3. The denitrification device for landfill leachate treatment according to claim 2, characterized in that: The bottom of the movable block (10) is rotatably mounted with a second rotating shaft (13), and a spiral plate is fixedly installed on the outer wall of the second rotating shaft (13). A first rolling bearing (14) is fixedly sleeved on the outer wall of the second rotating shaft (13), and an annular storage box (15) is fixedly installed on the outer wall of the first rolling bearing (14). Multiple nozzles are fixedly installed on the outer wall of the annular storage box (15), and a first conveying pipe (16) is fixedly installed on the top of the annular storage box (15). A first mounting plate (17) is fixedly installed on the rear side of the denitrification box (1).

4. A denitrification device for landfill leachate treatment according to claim 3, characterized in that: The cleaning assembly includes a water tank (18), which is fixedly mounted on a first mounting plate (17). An inlet (19) is fixedly mounted on the top of the water tank (18), and a water pump (20) is fixedly mounted on the top of the water tank (18).

5. A denitrification device for landfill leachate treatment according to claim 4, characterized in that: The output end of the water pump (20) is fixedly installed with the same hose (21) at the top of the first delivery pipe (16), and the top of the water bucket (18) is fixedly installed with the second delivery pipe (22). The input end of the water pump (20) is fixedly installed with the same third delivery pipe (23) at the top of the second delivery pipe (22).

6. A denitrification device for landfill leachate treatment according to claim 5, characterized in that: The top of the water bucket (18) and the middle position are rotatably mounted with a first rotating shaft (24), and a plurality of first stirring plates (25) are fixedly mounted on the outer wall of the first rotating shaft (24). A scraper (26) is fixedly mounted at the bottom end of the second rotating shaft (13), and the scraper (26) contacts the bottom inner wall of the denitrification box (1). Two second rolling bearings (27) are fixedly sleeved on the outer wall of the second rotating shaft (13).

7. A denitrification device for landfill leachate treatment according to claim 6, characterized in that: The stirring assembly includes a support frame (28), which is fixedly mounted on the outer wall of two second rolling bearings (27). A first bevel gear (29) is fixedly sleeved on the outer wall of the second rotating shaft (13), and the first bevel gear (29) meshes with two second bevel gears (30). A first drive shaft (31) is fixedly mounted on each of the two second bevel gears (30), and the two first drive shafts (31) are rotatably mounted on the support frame (28). Multiple second stirring plates (32) are fixedly mounted on the outer wall of each of the two first drive shafts (31), and a support plate (33) is fixedly mounted on the bottom front side of the protective plate (8).

8. A denitrification device for landfill leachate treatment according to claim 7, characterized in that: A rack (34) is fixedly installed on the rear side of the support plate (33), and the rack (34) meshes with a gear (35), which is fixedly sleeved on the outer wall of the second rotating shaft (13).

9. A denitrification device for landfill leachate treatment according to claim 8, characterized in that: The top of the bucket (18) is fixedly mounted with a second mounting plate (36), and a second drive shaft (37) is rotatably mounted on the second mounting plate (36). A third bevel gear (38) is fixedly mounted on the right end of the second drive shaft (37), and the third bevel gear (38) meshes with a fourth bevel gear (39). The fourth bevel gear (39) is fixedly mounted on the top of the first rotating shaft (24).

10. A denitrification device for landfill leachate treatment according to claim 9, characterized in that: A first sprocket (40) is fixedly sleeved on the outer wall of the output shaft of the drive motor (12), and the first sprocket (40) meshes with a chain (41). The chain (41) meshes with a second sprocket (42), and the second sprocket (42) is fixedly sleeved on the outer wall of the second transmission shaft (37).

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