CN219526384U

CN219526384U - Landfill leachate anaerobic reactor

Info

Publication number: CN219526384U
Application number: CN202222865583.7U
Authority: CN
Inventors: 薛晓冬; 刘利彬; 杨志勇; 张京京; 黄伟; 宋恩来; 赵路; 闵虹菲
Original assignee: Zhengzhou Public Environmental Technology Co ltd
Current assignee: Zhengzhou Public Environmental Technology Co ltd
Priority date: 2022-10-29
Filing date: 2022-10-29
Publication date: 2023-08-15
Anticipated expiration: 2032-10-29

Abstract

The utility model discloses a landfill leachate anaerobic reactor, which comprises a reaction tank, wherein activated sludge is arranged in the reaction tank; the bottom of the reaction tank is provided with a first water distributor; the first water distributor comprises a plurality of circles of annular water distribution pipes and a water inlet pipe; the annular water distribution pipes are different in diameter and are coaxially arranged, a plurality of first branches are arranged on the annular water distribution pipes, and the first branches are arranged clockwise or anticlockwise; one end of the water inlet pipe is communicated with the water distribution main pipe, and the other end is communicated with the liquid storage tank; the upper part of the reaction tank is provided with a three-phase separator, and the top of the three-phase separator is provided with an air duct communicated with the gas-liquid separator; the top of the gas-liquid separator is provided with a methane discharge pipe, the bottom of the gas-liquid separator is provided with a return pipe, and the lower end of the return pipe is communicated with a second water distributor; the second water distributor comprises a rotary pipe communicated with the return pipe through a rotary connector, a distribution box communicated with the rotary pipe and a second branch; the other end of the second branch is in a closed state, and a plurality of third branches are arranged on the second branch; the rotary pipe is provided with a driving device; the side wall above the reaction tank is provided with a water outlet pipe, and the bottom is provided with a mud discharging pipe.

Description

Landfill leachate anaerobic reactor

Technical Field

The utility model relates to the technical field of wastewater treatment, in particular to a landfill leachate anaerobic reactor.

Background

The garbage penetrating fluid is garbage percolated water, and when garbage is squeezed, decomposed and surface water is used to produce high concentration organic waste water. The anaerobic reactor is a common device suitable for garbage leachate treatment, and has the characteristics of high treatment complex, low operation cost and the like. After the wastewater to be treated enters the bottom of the reactor, the wastewater passes through a sludge bed, then the separation of water, gas and sludge is realized through a three-phase separator, and finally the treated water is discharged from the reactor.

The bottom of the anaerobic reactor is provided with a water distributor for mixing the sludge and the water by utilizing the inflow water, so that the water distributor is arranged in a mode of mixing the activated sludge and the water, the possibility of a water distribution dead zone is reduced as much as possible, the water distribution is more uniform, otherwise, the treatment effect of the anaerobic reactor is greatly reduced, but the water distributor arranged at the bottom of the existing reactor generally adopts a one-pipe multi-point or one-pipe one-point mode water distribution, and the water distributor is simple in arrangement, but is uneven in water distribution and difficult to play a role of hydraulically stirring mixed materials; in addition, in the anaerobic reaction, more bubbles are generated in the reactor, and the bubbles are easily attached to the surface of the sludge to increase the buoyancy of the bubbles, so that the floating sludge is formed above the reactor, and the upper three-phase separator is blocked. It is therefore highly desirable to design a landfill leachate anaerobic reactor.

Disclosure of Invention

In order to solve the problems, the utility model adopts the following technical scheme:

the garbage leachate anaerobic reactor comprises a reaction tank, wherein the reaction tank is filled with activated sludge; the bottom of the reaction tank is provided with a first water distributor; the first water distributor comprises a plurality of circles of annular water distribution pipes, a water distribution main pipe and a water inlet pipe, wherein the water distribution main pipe is respectively communicated with the annular water distribution pipes; the annular water distribution pipes are different in diameter and are coaxially arranged, a plurality of first branches are arranged on the annular water distribution pipes, and the first branches on the same annular water distribution pipe are arranged clockwise or anticlockwise; one end of the water inlet pipe is communicated with the water distribution main pipe, and the other end of the water inlet pipe is communicated with the liquid storage tank through the water inlet pump; at least one layer of three-phase separator is arranged at the upper part of the reaction tank, and an air duct communicated with the gas-liquid separator outside the reaction tank is arranged at the top of the three-phase separator; the top of the gas-liquid separator is provided with a methane discharge pipe, the bottom of the gas-liquid separator is provided with a return pipe, the return pipe extends to the upper part of the first water distributor, and the lower end of the return pipe is communicated with the second water distributor; the second water distributor comprises a rotary pipe communicated with the return pipe through a rotary connector, a distribution box positioned at the lower end of the rotary pipe and communicated with the rotary pipe, and second branches uniformly distributed on the distribution box; the other end of the second branch is in a closed state, and a plurality of third branches are arranged on the second branch; the rotary pipe is provided with a driving device for driving the rotary pipe to rotate; the side wall of the reaction tank above the three-phase separator is provided with a water outlet pipe, and the bottom of the reaction tank is provided with a mud discharging pipe.

Further, the driving device comprises a driving bevel gear sleeved on the rotating pipe, a horizontal rotating shaft rotationally connected with the reaction tank, and a driven bevel gear meshed with the driving bevel gear and sleeved on the horizontal rotating shaft; the horizontal rotating shaft is connected with an output shaft of a motor arranged outside the reaction tank.

Further, two rows of sequentially staggered baffle plates are arranged between the three-phase separator and the rotary joint in the reaction tank; the two ends of the baffle plate corresponding to each other are fixed on the inner wall of the reaction tank, and a gap is arranged between the other two ends of the baffle plate and the inner wall of the reaction tank; the inclined directions of the two rows of baffle plates are opposite, and the two rows of baffle plates are partially overlapped in the orthographic projection direction; the reflux tank penetrates through the baffle plates in sequence.

Further, a plurality of spike parts are arranged on the upper surface and the lower surface of the baffle plate.

Further, an overflow weir is arranged above the three-phase separator in the reaction tank, and the water outlet pipe is communicated with the overflow weir.

Further, a liquid return pipe is arranged on the water outlet pipe, and the liquid return pipe is communicated with the liquid storage tank; and the liquid return pipe is communicated with a sampling pipe.

Further, the first branch is horizontally arranged or obliquely downwards arranged.

Further, an included angle between a tangential plane where a communication point of the first branch and the annular water distribution pipe is positioned and a plane where the water outlet direction of the branch is positioned is 45 degrees.

Further, the lower surface of the distribution box is provided with a mounting shaft, and a plurality of stirring blades are arranged on the mounting shaft.

Further, the driving bevel gear and the driven bevel gear housing are provided with protective covers; the horizontal rotating shaft and the rotating pipe are both in rotating connection with the protective cover.

The utility model has the beneficial effects that: 1. according to the utility model, the first water distributor and the second water distributor are arranged at the bottom of the reactor, the first water distributor consists of a plurality of circles of annular water distribution pipes, the water outlet directions of a plurality of first branches on the first water distributor are arranged clockwise or anticlockwise, when sewage is sprayed out of the first branches, and the inclined directions of the first branches are consistent, so that water flows rotating in the same direction are formed after the sewage is sprayed out, the hydraulic stirring capacity of the bottom is enhanced, and meanwhile, the bottom of the reaction tank is effectively prevented from forming dead zones; in addition, the utility model is provided with the water distributor II, the liquid separated in the gas-liquid separator flows into the distribution box through the return pipe, then flows out of each branch III through the distribution box, and when the motor rotates, the driving bevel gear drives the driven bevel gear to rotate, and the rotating pipe rotates along with the driven bevel gear, so that the branch II and the branch III also rotate along with the driven bevel gear, thereby realizing the effect of mechanical stirring while realizing liquid return, and further enhancing the mixing degree of the water and the activated sludge at the bottom of the reaction tank; in addition, a plurality of baffle plates are arranged in the tank body, when bubbles carry sludge to float upwards, and when the bubbles touch the baffle plates, rising mixture loses rising power due to the resistance of the baffle plates, so that the sludge falls back to the bottom of the tank body or floats in the tank body, and gas continues to rise.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic structural view of a first water distributor according to the present utility model;

FIG. 3 is a schematic structural diagram of a second water distributor according to the present utility model;

reference numerals: 1. a reaction tank; 2. a three-phase separator; 3. a gas-liquid separator; 4. a biogas discharge pipe; 5. an air duct; 6. a return pipe; 7. a baffle plate; 8. a rotary joint; 9. a driven bevel gear; 10. a drive bevel gear; 11. a horizontal rotation shaft; 12. a motor; 13. a water inlet pump; 14. a liquid storage tank; 15. a liquid return pipe; 16. a sampling tube; 17. a rotating tube; 18. a dispensing box; 19. a second branch; 20. a third branch; 21. an annular water distribution pipe; 22. a water distribution main pipe; 23. a first branch; 24. a water inlet pipe; 25. a protective cover; 26. stirring blades; 27. and overflow weir.

Detailed Description

The technical solution of the present utility model will be further described with reference to fig. 1 to 3 and examples, so that those skilled in the art can more clearly understand the content of the technical solution.

Example 1:

the utility model relates to a landfill leachate anaerobic reactor, which comprises a reaction tank 1, wherein the reaction tank 1 is filled with activated sludge; at least one layer of three-phase separator 2 is arranged at the upper part of the reaction tank 1, and an air duct 5 communicated with the gas-liquid separator 3 outside the reaction tank 1 is arranged at the top of the three-phase separator 2; the top of the gas-liquid separator 3 is provided with a methane discharge pipe 4, and the bottom thereof is provided with a return pipe 6. The biogas discharge pipe in the embodiment can be communicated with a biogas storage device or a flare system, and the subsequent treatment mode of biogas can be selected according to requirements. In addition, the structure of the gas-liquid separator provided in this embodiment is disclosed in the prior art, and is not described in detail here. The side wall of the reaction tank 1 above the three-phase separator 2 is provided with a water outlet pipe, and the bottom of the reaction tank 1 is provided with a mud discharging pipe. An overflow weir 27 is arranged above the three-phase separator 2 in the reaction tank 1, and the water outlet pipe is communicated with the overflow weir 27.

The bottom of the reaction tank 1 is provided with a first water distributor; the first water distributor comprises a plurality of circles of annular water distribution pipes 21, a water distribution main pipe 22 and a water inlet pipe 24, wherein the water distribution main pipe 22 is respectively communicated with the annular water distribution pipes 21; the annular water distribution pipes 21 are different in diameter and are coaxially arranged, a plurality of first branches 23 are arranged on the annular water distribution pipe 21, the water outlet direction of the first branches 23 on the same annular water distribution pipe 21 is consistent with the included angle of the annular water distribution pipe, and the first branches are arranged clockwise or anticlockwise; the bottom of the reaction tank in the embodiment can be set to be a plane or a cone, and when the bottom is a plane, the plurality of circles of annular water distribution pipes are positioned on the same plane; when the bottom is the conical surface, a plurality of circles of annular water distribution pipes can be sequentially arranged at different heights along the conical surface and are distributed in a conical shape as a whole. The annular water distribution pipe can be fixed at the bottom of the reaction tank through an annular buckle. One end of the water inlet pipe 24 is communicated with the water distribution main pipe 22, and the other end is communicated with the liquid storage tank 14 through the water inlet pump 13.

When the waste permeate enters the water inlet pipe from the liquid storage tank through the water pump, water is distributed in each annular water distribution pipe through the water distribution main pipe, and as the inclination angles of the branches I are consistent, when sewage is sprayed out from the branches I, waste permeate and sewage form water flow rotating in the same direction in the reaction tank, so that the effect of strong hydraulic mixing and stirring on the sludge and sewage at the bottom is achieved.

The return pipe 6 extends to the upper part of the first water distributor, and the lower end of the return pipe is communicated with the second water distributor; the second water distributor comprises a rotary pipe 17 communicated with the return pipe 6 through a rotary joint 8, a distribution box 18 positioned at the lower end of the rotary pipe 17 and communicated with the rotary pipe 17, and second branches 19 uniformly distributed on the distribution box 18; the other end of the branch II 19 is in a closed state, and a plurality of branches III 20 are arranged on the other end of the branch II; the rotary pipe 17 is provided with a driving device for driving the rotary pipe to rotate; the driving device comprises a driving bevel gear 10 sleeved on a rotary pipe 17, a horizontal rotary shaft 11 rotatably connected with the reaction tank 1, and a driven bevel gear 9 sleeved on the horizontal rotary shaft 11 and meshed with the driving bevel gear 10; the horizontal rotation shaft 11 is connected with an output shaft of a motor 12 arranged outside the reaction tank 1. The outer covers of the driving bevel gear 10 and the driven bevel gear 9 are provided with protective covers 25; the horizontal rotating shaft 11 and the rotating pipe 17 are both rotatably connected with the protecting cover 25. In addition, the protection cover in the embodiment can be fixed on the inner wall of the reaction tank through the support rod.

The second water distributor is arranged in the embodiment, when the motor is started, the horizontal rotating shaft is driven to rotate, the rotating pipe is driven to rotate, the distribution box, the second branch and the third branch on the horizontal rotating shaft rotate along with the rotating pipe, when the liquid of the gas-liquid separator is discharged, the liquid can be discharged into the reaction tank from the third branch, and meanwhile, the bottom can be mechanically stirred and mixed due to the rotation of the third branch.

In addition, the lower surface of the distribution box 18 is provided with a mounting shaft on which a plurality of stirring blades 26 are provided. The stirring blade is arranged, and when the distribution box rotates, the stirring blade also rotates along with the rotation of the distribution box, and the stirring blade also plays a role in mechanical stirring.

In the embodiment, the hydraulic stirring and the mechanical stirring are combined with each other, and compared with the water distribution mode in the prior art, the sludge and the sewage in the technical scheme are more uniformly mixed, the water distribution dead zone is not easy to occur, and the water distribution is more uniform.

Example 2:

this embodiment differs from embodiment 1 in that: the included angle between the tangential plane of the connection point of the first branch 23 and the annular water distribution pipe 21 and the plane of the water outlet direction of the branch is 45 degrees. In addition, the first branch in the embodiment can be connected with a jet head, and the structure of the jet head is just the structure in the prior art. The first branch 23 is arranged horizontally or obliquely downwards.

The inclination angle of the branch is limited, and the jet head is connected to the end part of the first branch, so that the jet speed of water flow is increased, the inclination angles of the branches are consistent, the jet angles of the water flow are consistent, and the sewage is easier to form water flow rotating in the same direction.

Example 3:

this embodiment differs from embodiment 2 in that: two rows of sequentially staggered baffle plates 7 are arranged between the three-phase separator 2 and the rotary joint 8 in the reaction tank 1; the two ends of the baffle plate 7 corresponding to each other are fixed on the inner wall of the reaction tank 1, and a gap is arranged between the other two ends of the baffle plate and the inner wall of the reaction tank 1; the inclined directions of the two rows of baffle plates 7 are opposite, and the two rows of baffle plates 7 are partially overlapped in the orthographic projection direction; the reflux drum penetrates the baffle 7 in turn. In the embodiment, the baffle plate is additionally arranged in the reaction tank, so that when the sludge carried by bubbles ascends and touches the baffle plate, the bubbles are blocked by the baffle plate and cannot continuously ascend, and the activated sludge carried in the reaction tank is settled or suspended due to self weight, so that the sludge amount continuously ascended into the three-phase separator is reduced, and the possibility of blockage of the three-phase separator is prevented.

In addition, a plurality of spike parts are arranged on the upper surface and the lower surface of the baffle 7. The spike part is arranged, so that bubbles touching the baffle plate are conveniently punctured, and the bubbles are further prevented from carrying sludge to rise to the top.

Example 4:

this embodiment differs from embodiment 3 in that: the water outlet pipe is provided with a liquid return pipe 15, and the liquid return pipe 15 is communicated with the liquid storage tank 14; the liquid return pipe 15 is communicated with a sampling pipe 16. In this embodiment, a liquid return pipe is added, after the reaction starts, the effluent is returned to the liquid storage tank through the liquid return pipe, and is sampled and detected from the sampling pipe 16 at intervals until the detected effluent is qualified, and then the effluent is discharged to a normal subsequent treatment path through the water outlet pipe.

In addition, the valve arrangement on each pipe in this embodiment, and the arrangement of the liquid level gauge and the pressure gauge are common knowledge of the skilled person, and are not described in detail here.

It will be understood that the above detailed description of the present utility model is provided for illustrating the present utility model and not for limiting the technical scheme described by the embodiments of the present utility model, and it will be understood by those skilled in the art that the present utility model may be modified or substituted for the same technical effect without departing from the spirit and scope of the present utility model as defined in the appended claims.

Claims

1. The utility model provides a landfill leachate anaerobic reactor, includes retort (1), its characterized in that: the reaction tank (1) is filled with activated sludge; the bottom of the reaction tank (1) is provided with a first water distributor; the first water distributor comprises a plurality of circles of annular water distribution pipes (21), a water distribution main pipe (22) respectively communicated with the annular water distribution pipes (21), and a water inlet pipe (24); the annular water distribution pipes (21) are different in diameter and are coaxially arranged, a plurality of first branches (23) are arranged on the annular water distribution pipes (21), and the first branches (23) on the same annular water distribution pipe (21) are arranged clockwise or anticlockwise; one end of the water inlet pipe (24) is communicated with the water distribution main pipe (22), and the other end of the water inlet pipe is communicated with the liquid storage tank (14) through the water inlet pump (13); at least one layer of three-phase separator (2) is arranged at the upper part of the reaction tank (1), and an air duct (5) communicated with the gas-liquid separator (3) outside the reaction tank (1) is arranged at the top of the three-phase separator (2); the top of the gas-liquid separator (3) is provided with a methane discharge pipe (4), the bottom of the gas-liquid separator is provided with a return pipe (6), the return pipe (6) extends to the upper part of the first water distributor, and the lower end of the return pipe is communicated with the second water distributor; the second water distributor comprises a rotary pipe (17) communicated with the return pipe (6) through a rotary joint (8), a distribution box (18) positioned at the lower end of the rotary pipe (17) and communicated with the rotary pipe (17), and second branches (19) uniformly distributed on the distribution box (18); the other end of the branch II (19) is in a closed state, and a plurality of branch III (20) are arranged on the other end of the branch II; the rotary pipe (17) is provided with a driving device for driving the rotary pipe to rotate; the side wall of the reaction tank (1) above the three-phase separator (2) is provided with a water outlet pipe, and the bottom of the reaction tank (1) is provided with a mud discharging pipe.

2. A landfill leachate anaerobic reactor according to claim 1, wherein: the driving device comprises a driving bevel gear (10) sleeved on the rotary pipe (17), a horizontal rotating shaft (11) rotatably connected with the reaction tank (1), and a driven bevel gear (9) sleeved on the horizontal rotating shaft (11) and meshed with the driving bevel gear (10); the horizontal rotating shaft (11) is connected with an output shaft of a motor (12) arranged outside the reaction tank (1).

3. A landfill leachate anaerobic reactor according to claim 1, wherein: two rows of sequentially staggered baffle plates (7) are arranged between the three-phase separator (2) and the rotary joint (8) in the reaction tank (1); the two ends of the baffle plate (7) which are corresponding to each other are fixed on the inner wall of the reaction tank (1), and a gap is arranged between the other two ends of the baffle plate and the inner wall of the reaction tank (1); the inclination directions of the two rows of baffle plates (7) are opposite, and the two rows of baffle plates (7) are partially overlapped in the orthographic projection direction; the return pipe sequentially penetrates through the baffle plate (7).

4. A landfill leachate anaerobic reactor according to claim 3, wherein: the upper surface and the lower surface of the baffle plate (7) are respectively provided with a plurality of spike parts.

5. A landfill leachate anaerobic reactor according to claim 1, wherein: an overflow weir (27) is arranged above the three-phase separator (2) in the reaction tank (1), and the water outlet pipe is communicated with the overflow weir (27).

6. A landfill leachate anaerobic reactor according to claim 1, wherein: the water outlet pipe is provided with a liquid return pipe (15), and the liquid return pipe (15) is communicated with the liquid storage tank (14); the liquid return pipe (15) is communicated with a sampling pipe (16).

7. A landfill leachate anaerobic reactor according to claim 1, wherein: the first branch (23) is horizontally arranged or obliquely downwards arranged.

8. A landfill leachate anaerobic reactor according to claim 1, wherein: an included angle between a tangential plane where a communication point of the first branch (23) and the annular water distribution pipe (21) is positioned and a plane where the water outlet direction of the branch is positioned is 45 degrees.

9. A landfill leachate anaerobic reactor according to claim 1, wherein: the lower surface of the distribution box (18) is provided with a mounting shaft, and a plurality of stirring blades (26) are arranged on the mounting shaft.

10. A landfill leachate anaerobic reactor according to claim 2, wherein: the driving bevel gear (10) and the driven bevel gear (9) are covered by a protective cover (25); the horizontal rotating shaft (11) and the rotating pipe (17) are rotatably connected with the protective cover (25).