Garbage leachate denitrification device based on EGSB (Expanded Granular Sludge Bed)
By adopting an EGSB-based design in the garbage leachate nitrogen denitrition device, the contact area is increased by using expanded particulate sludge and phosphorus-removing and nitrogen-removing bacterial species particle fillers, the problems of small contact area and low usage rate in the existing devices are solved, and a more efficient nitrogen-removing effect is achieved.
Patent Information
- Application Number
- CN202420924203.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-04-29
AI Technical Summary
In the existing waste leachate nitrogen denitrition device, the contact area between the biological filler and the leachate is small and the usage rate is low, resulting in slow purification speed and low efficiency.
A waste leachate denitrogenation device based on EGSB is designed, including an aeration stirring tank, a denitrification reaction box and a water storage tank. The leachate containing nitrification reaction box is introduced into the denitrogenation reaction box through a water pump, and the contact area is increased by expanding particulate sludge and phosphorus-denitrogenation bacterial seeds particle fillers are used to conduct anaerobic denitrification reaction.
By increasing the contact area between the biological filler and the leachate, the purification speed and efficiency are significantly improved, and a more efficient nitrogen removal effect of the waste leachate is achieved.
Smart Images
Figure CN222665602U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of landfill leachate denitrification, in particular to a landfill leachate denitrification device based on EGSB. Background Art
[0002] EGSB, or Expanded Granular Sludge Bed reactor, is a highly efficient anaerobic biological treatment technology. Its core feature lies in the suspended and expanded state of granular sludge, which enables the sludge to fully mix and contact with organic matter in the wastewater, thereby improving the mass transfer efficiency and anaerobic reaction rate. Leachate denitrification is a leachate treatment process. Its main purpose is to remove nitrogen from the leachate to reduce environmental pollution. Leachate denitrification requires a leachate denitrification device.
[0003] Some landfill leachate denitrification devices currently on the market have a small contact area between the biological filler and the leachate and a low utilization rate, resulting in a slow leachate purification speed and low efficiency.
[0004] Therefore, we proposed a landfill leachate denitrification device based on EGSB to solve the above problems. Utility Model Content
[0005] The utility model aims to solve the problem that some current landfill leachate denitrification devices have a small contact area between the biological filler and the leachate, a low utilization rate, and thus a slow leachate purification speed and low efficiency.
[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a landfill leachate denitrification device based on EGSB, comprising a device frame, an aeration stirring tank, a denitrification reaction box, and a water storage tank are arranged on the device frame, the top of the aeration stirring tank is arranged as an open structure, and a stirring rod is arranged in the aeration stirring tank, a support frame is arranged at a position corresponding to the aeration stirring tank on the device frame, a motor connected to the stirring rod is arranged on the support frame, a liquid inlet pipe, a nitrifying bacteria preparation guide pipe, and a flocculant guide pipe are arranged at a position near the top of the side of the aeration stirring tank, a plurality of partition layers are arranged in the denitrification reaction box, and the denitrification reaction box is divided by the partition layers. It is divided into a water distribution area, a sludge area, a phosphorus removal and denitrification bacteria area, and a water outlet area. A water distributor is arranged in the water distribution area. The sludge area includes a first sedimentation area and a first suspension area. Expanded granular sludge is arranged in the first sedimentation area. The phosphorus removal and denitrification bacteria area includes a second sedimentation area and a second suspension area. The second sedimentation area is provided with a phosphorus removal and denitrification bacteria granular filler. A three-phase separator is arranged in the water outlet area. An air guide pipe is arranged on the three-phase separator. A drainage pipe is arranged between the water outlet area and the water storage tank. A water pump is arranged on the device frame. A first water guide pipe is arranged between the input end of the water pump and the aeration stirring tank, and a second water guide pipe is arranged between the output end of the water pump and the water distributor.
[0007] Furthermore, a steam-water separator is arranged on the top of the denitrification reaction box, an air outlet pipe is arranged on the steam-water separator, and the steam-water separator is connected to the air guide pipe.
[0008] Furthermore, a mud discharge pipe is provided at the bottom of the aeration and stirring tank, and a first rotary valve is installed on the mud discharge pipe. A water outlet pipe is provided at the bottom of the water storage tank, and a second rotary valve is installed on the water outlet pipe.
[0009] Furthermore, the water distributor includes a first annular water distribution pipe, a second annular water distribution pipe, and a third annular water distribution pipe, the centers of the first annular water distribution pipe, the second annular water distribution pipe, and the third annular water distribution pipe are the same, and a connecting pipe is connected between the first annular water distribution pipe, the second annular water distribution pipe, and the third annular water distribution pipe, water distribution holes are opened on the first annular water distribution pipe, and a connecting column is fixed between the first annular water distribution pipe and the inner wall of the denitrification reaction box.
[0010] Furthermore, the separation layer comprises a separation plate, a cavity is formed in the separation plate, a separation net is arranged in the cavity, and a plurality of evenly distributed grid holes are formed on the upper and lower surfaces of the separation plate.
[0011] Furthermore, the bottoms of the aeration stirring tank and the water storage tank are both configured as inverted bucket structures.
[0012] The beneficial effects of the utility model are as follows: an aeration stirring tank, a denitrification reaction box, and a water storage tank are arranged on the device frame, a water distributor is arranged in the water distribution area of the denitrification reaction box, expanded granular sludge is arranged in the first sedimentation area, a dephosphorization and denitrification bacterial granular filler is arranged in the second sedimentation area, a three-phase separator is arranged in the water outlet area, an air guide pipe is arranged on the three-phase separator, a drainage pipe is arranged between the water outlet area and the water storage tank, a water pump is arranged on the device frame, and a water pump is arranged between the input end of the water pump and the aeration stirring tank. A first water pipe is provided, and a second water pipe is provided between the output end of the water pump and the water distributor. The garbage leachate can be firstly introduced into the aeration stirring tank for aerobic nitrification reaction to convert ammonia nitrogen into nitrate nitrogen, and then the garbage leachate containing nitrate nitrogen is introduced into the denitrification reaction box through the water pump for anaerobic denitrification reaction. The expanded granular sludge and the granular filler of the phosphorus removal and denitrification bacteria are suspended through the hydraulic rising flow rate and the gas production rising flow rate, thereby increasing the contact area with the leachate, thereby greatly improving the purification speed and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the structure of the garbage leachate denitrification device based on EGSB of the utility model;
[0014] Figure 2 This utility model Figure 1 A magnified schematic diagram of the local structure A;
[0015] Figure 3 It is a partial structural schematic diagram of the utility model.
[0016] The names corresponding to the marks in the figure are:
[0017] 1. Device frame; 2. Aeration and stirring tank; 3. Denitrification reaction box; 301. Water outlet; 302. First suspension zone; 303. Second suspension zone; 4. Water storage tank; 5. Stirring rod; 6. Support frame; 7. Aeration and stirring tank; 8. Liquid inlet pipe; 9. Nitrifying bacteria preparation guide pipe; 10. Flocculant guide pipe; 11. Separation layer; 111. Separation plate; 1111. Grid hole; 112. Separation net; 12. Water distributor; 121. First annular water distribution pipe; 122. Second Annular water distribution pipe; 123, third annular water distribution pipe; 124, connecting pipe; 125, water distribution hole; 126, connecting column; 13, expanded granular sludge; 14, dephosphorization and denitrification bacteria granular filler; 15, three-phase separator; 16, air duct; 17, drain pipe; 18, water pump; 19, first water duct; 20, second water duct; 21, steam-water separator; 22, air outlet pipe; 23, sludge discharge pipe; 24, first rotary valve; 25, water outlet pipe; 26, second rotary valve. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.
[0019] Embodiments of the present utility model:
[0020] Embodiment 1
[0021] like Figure 1-Figure 3As shown, the utility model provides a landfill leachate denitrification device based on EGSB, including a device frame 1, on which an aeration stirring tank 2, a denitrification reaction box 3, and a water storage tank 4 are arranged, the top of the aeration stirring tank 2 is set as an open structure, and a stirring rod 5 is arranged in the aeration stirring tank 2, a support frame 6 is arranged at a position corresponding to the aeration stirring tank 2 on the device frame 1, and a motor 7 connected to the stirring rod 5 is arranged on the support frame 6, a liquid inlet pipe 8, a nitrifying bacteria preparation guide pipe 9, and a flocculant guide pipe 10 are arranged near the top of the side of the aeration stirring tank 7, and the denitrification reaction box 3 is arranged in the water storage tank 4. A plurality of partition layers 11 are arranged, and the denitrification reaction box 3 is divided into a water distribution area, a sludge area, a phosphorus removal and denitrification bacteria area, and a water outlet area 301 by the partition layers 11. A water distributor 12 is arranged in the water distribution area. The sludge area includes a first sedimentation area and a first suspension area 302. The first sedimentation area is provided with expanded granular sludge 13. The phosphorus removal and denitrification bacteria area includes a second sedimentation area and a second suspension area 303. The second sedimentation area is provided with a phosphorus removal and denitrification bacteria granular filler 14. A three-phase separator 15 is arranged in the water outlet area 301. An air guide pipe 16 is arranged on the three-phase separator 15. A gas guide pipe 16 is arranged between the water outlet area 301 and the water storage tank 4. There is a drainage pipe 17, a water pump 18 is arranged on the device frame 1, a first water guide pipe 19 is arranged between the input end of the water pump 18 and the aeration stirring tank 2, and a second water guide pipe 20 is arranged between the output end of the water pump 18 and the water distributor 12, the partition layer 11 includes a partition plate 111, a cavity is opened in the partition plate 111, a partition net 112 is arranged in the cavity, and a plurality of evenly distributed grid holes 1111 are opened on the upper and lower surfaces of the partition plate 111, and garbage leachate can be added to the aeration stirring tank 2 through the liquid inlet pipe 8, and nitrifying bacteria preparation can be added to the aeration stirring tank 2 through the nitrifying bacteria preparation guide pipe 9 Then, the motor 7 is turned on to drive the stirring rod 5 to stir and perform aerobic nitrification reaction. Then, the landfill leachate containing nitrate nitrogen is introduced into the water distributor 12 through the cooperation of the water pump 18, the first water pipe 19, and the second water pipe 20, and then introduced into the denitrification reaction box 3 through the water distributor 12. The landfill leachate rises and contacts with the expanded granular sludge 13 and the phosphorus removal and denitrification bacteria granular filler 14. While performing denitrification purification, biogas and nitrogen are generated, and then separated through the three-phase separator 15. The biogas and nitrogen are discharged through the air pipe 16, and the water enters the water storage tank 4 through the drainage pipe 17 for storage.
[0022] Embodiment 2
[0023] like Figure 1-Figure 3As shown, on the basis of the first embodiment of the utility model: a steam-water separator 21 is arranged on the top of the denitrification reaction box 3, an air outlet pipe 22 is arranged on the steam-water separator 21, and the steam-water separator 21 is connected to the air guide pipe 16, and the water in the biogas and nitrogen can be removed by the steam-water separator 21, and then discharged through the air outlet pipe 22, a mud discharge pipe 23 is arranged at the bottom of the aeration stirring tank 2, and a first rotary valve 24 is installed on the mud discharge pipe 23, a water outlet pipe 25 is arranged at the bottom of the water storage tank 4, and a second rotary valve 26 is installed on the water outlet pipe 25, the water distributor 12 includes a first annular water distribution pipe 121, a second annular water distribution pipe 122, and a third annular water distribution pipe 123, the first The centers of the first annular water distribution pipe 121, the second annular water distribution pipe 122, and the third annular water distribution pipe 123 are the same, and a connecting pipe 124 is connected between the first annular water distribution pipe 121, the second annular water distribution pipe 122, and the third annular water distribution pipe 123. Water distribution holes 125 are opened on the first annular water distribution pipe 121, the second annular water distribution pipe 122, and the third annular water distribution pipe 123, and a connecting column 126 is fixed between the first annular water distribution pipe 121 and the inner wall of the denitrification reaction box 3. Through such an arrangement, water can be distributed more evenly. The bottoms of the aeration stirring tank 2 and the water storage tank 4 are both arranged as inverted bucket structures. Through such an arrangement, drainage is convenient.
Claims
1. A landfill leachate denitrification device based on EGSB, characterized by: The invention comprises a device frame (1), on which an aeration stirring tank (2), a denitrification reaction box (3), and a water storage tank (4) are arranged. The top of the aeration stirring tank (2) is arranged as an open structure, and a stirring rod (5) is arranged in the aeration stirring tank (2). A support frame (6) is arranged at a position corresponding to the aeration stirring tank (2) on the device frame (1), and a motor (7) connected to the stirring rod (5) is arranged on the support frame (6). A liquid inlet pipe (8), a nitrifying bacteria preparation guide pipe (9), and a flocculant guide pipe (10) are arranged at a position near the top of the side of the aeration stirring tank (2). A plurality of partition layers (11) are arranged in the denitrification reaction box (3), and the denitrification reaction box (3) is divided into a water distribution area, a sludge area, a dephosphorization and denitrification bacteria area, and a water outlet area (301) by the partition layers (11). A water distributor (12) is provided in the water distribution area, the sludge area includes a first sedimentation area and a first suspension area (302), the first sedimentation area is provided with expanded granular sludge (13), the phosphorus removal and denitrification bacteria area includes a second sedimentation area and a second suspension area (303), the second sedimentation area is provided with a phosphorus removal and denitrification bacteria granular filler (14), a three-phase separator (15) is provided in the water outlet area (301), an air guide pipe (16) is provided on the three-phase separator (15), a drainage pipe (17) is provided between the water outlet area (301) and the water storage tank (4), a water pump (18) is provided on the device frame (1), a first water guide pipe (19) is provided between the input end of the water pump (18) and the aeration stirring tank (2), and a second water guide pipe (20) is provided between the output end of the water pump (18) and the water distributor (12).
2. The EGSB-based landfill leachate denitrification device according to claim 1, characterized in that: A steam-water separator (21) is arranged on the top of the denitrification reaction box (3), an air outlet pipe (22) is arranged on the steam-water separator (21), and the steam-water separator (21) is connected to the air guide pipe (16).
3. The EGSB-based landfill leachate denitrification device according to claim 1, characterized in that: A mud discharge pipe (23) is provided at the bottom of the aeration stirring tank (2), and a first rotary valve (24) is installed on the mud discharge pipe (23); a water outlet pipe (25) is provided at the bottom of the water storage tank (4), and a second rotary valve (26) is installed on the water outlet pipe (25).
4. The EGSB-based landfill leachate denitrification device according to claim 1, characterized in that: The water distributor (12) comprises a first annular water distribution pipe (121), a second annular water distribution pipe (122), and a third annular water distribution pipe (123); the first annular water distribution pipe (121), the second annular water distribution pipe (122), and the third annular water distribution pipe (123) have the same center, and a connecting pipe (124) is connected between the first annular water distribution pipe (121), the second annular water distribution pipe (122), and the third annular water distribution pipe (123); water distribution holes (125) are provided on the first annular water distribution pipe (121), the second annular water distribution pipe (122), and the third annular water distribution pipe (123); and a connecting column (126) is fixed between the first annular water distribution pipe (121) and the inner wall of the denitrification reaction box (3).
5. The EGSB-based landfill leachate denitrification device according to claim 1, characterized in that: The separation layer (11) comprises a separation plate (111), a cavity is provided in the separation plate (111), a separation net (112) is arranged in the cavity, and a plurality of evenly distributed grid holes (1111) are provided on the upper and lower surfaces of the separation plate (111).
6. The EGSB-based landfill leachate denitrification device according to claim 1, characterized in that: The bottoms of the aeration and stirring tank (2) and the water storage tank (4) are both configured as inverted bucket structures.