CN215102734U

CN215102734U - Landfill leachate coagulating oxidation treatment system

Info

Publication number: CN215102734U
Application number: CN202121367394.6U
Authority: CN
Inventors: 严俊; 陈浩锋; 马利伟; 钱建兴; 邹弘; 陈焕新; 骆尧勤
Original assignee: Hangzhou Kangnuo Environment Technology Engineering Co ltd
Current assignee: Hangzhou Kangnuo Environment Technology Engineering Co ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2021-12-10
Anticipated expiration: 2031-06-18

Abstract

The utility model relates to a sewage processing field, concretely relates to landfill leachate oxidation treatment system that congeals. The specific technical scheme is as follows: comprises a sedimentation tank, an oxidation device, a first aeration tank and a second aeration tank; the sedimentation tank is connected with an oxidation device through a first pipeline, the oxidation device is connected with a first aeration tank through a second pipeline, and the effluent of the first aeration tank enters a second aeration tank; the first aeration tank is a square tank, and a hollow cylinder is arranged in the center of the first aeration tank; the first aeration tank is provided with spiral baffles surrounding the hollow cylinder, and two sides of each spiral baffle are respectively connected with the hollow cylinder and the tank wall; an aeration device is arranged in the first aeration tank. Compared with the prior art, the utility model relates to a simple structure, the aeration is efficient, goes out the landfill leachate oxidation treatment system that water quality is high and pollutant discharge is few.

Description

Landfill leachate coagulating oxidation treatment system

Technical Field

The utility model relates to a sewage processing field, concretely relates to landfill leachate oxidation treatment system that congeals.

Background

The urban domestic garbage leachate has various organic pollutants, complex water quality, high ammonia nitrogen and heavy metal content, large water quality and water quantity change and difficult treatment. However, in the oxidation and aeration processes in the sewage treatment process, there is a large gas discharge, and waste and discharge of a large amount of waste gas due to insufficient gas reaction are easily generated. In view of the further strict environmental requirements of the country, how to solve the problem economically, stably and effectively is urgent to achieve zero emission as much as possible.

Disclosure of Invention

The utility model aims at providing a landfill leachate coagulating oxidation processing system to solve above-mentioned problem.

In order to achieve the purpose of the invention, the technical scheme adopted by the utility model is as follows: comprises a sedimentation tank, an oxidation device, a first aeration tank and a second aeration tank; the sedimentation tank is connected with an oxidation device through a first pipeline, the oxidation device is connected with a first aeration tank through a second pipeline, and the effluent of the first aeration tank enters a second aeration tank; the first aeration tank is a square tank, and a hollow cylinder is arranged in the center of the first aeration tank; the first aeration tank is provided with spiral baffles surrounding the hollow cylinder, and two sides of each spiral baffle are respectively connected with the hollow cylinder and the tank wall; an aeration device is arranged in the first aeration tank.

Preferably, the aeration device comprises a first aeration group; the first aeration group is arranged at four corners of the first aeration tank from outside to inside for radial aeration, and the aeration direction is opposite to the spiral direction of the spiral baffle.

Preferably, the aeration device further comprises a second aeration group, and the second aeration group comprises aeration openings arranged at the bottom of the first aeration tank.

Preferably, the lower end face of the spiral baffle is provided with a gas baffle, one side of the spiral baffle, which is close to the lower end face of the gas baffle, is provided with an upward concave groove, and the bottom of the groove is provided with a through pipe; the second aeration group also comprises a plurality of air ducts arranged on the hollow cylinder, and a plurality of aeration holes are arranged on the air ducts; the through pipe is communicated with the aeration hole.

Preferably, a filter screen is arranged at the groove.

Preferably, the spiral baffle 32 is provided with a plurality of gas baffles and a corresponding number of grooves and gas guide tubes.

Preferably, the oxidation device is a low-temperature plasma reactor, and an air outlet of the low-temperature plasma reactor is connected with the aeration device of the first aeration tank through a check valve in a tee joint mode.

Preferably, the bottom of the first aeration tank is provided with a water outlet capable of being opened and closed; and the two second pipelines are respectively connected with the top and the bottom of the first aeration tank.

Preferably, the water outlet is connected with the sedimentation tank through a third pipeline.

Preferably, the second aeration tank is a low-speed plug-flow aeration tank.

The utility model has the beneficial technical effects that: introducing waste gas generated by the low-temperature plasma reactor into a first aeration tank, recycling residual ozone, supplying oxygen for the survival of microorganisms, reducing the aeration quantity of a fan, degrading pollutants in the waste gas through the action of a biological aerated filter, and ensuring no pollution after gas outlet; the spiral baffle increases the moving path of the gas in the first aeration tank, enhances the gas utilization rate and reduces the emission of waste gas pollutants; meanwhile, the four corners of the square first aeration tank ensure that impurities are not easy to precipitate.

Therefore, compared with the prior art, the utility model relates to a simple structure, aeration efficiency is high, goes out the landfill leachate oxidation treatment system that water quality is high and pollutant discharge is few.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention;

FIG. 2 is a perspective view of a first aeration tank according to an embodiment of the present invention;

FIG. 3 is a sectional view of a first aeration tank according to an embodiment of the present invention;

fig. 4 is a sectional view of a first aeration tank according to an embodiment of the present invention.

In the figure: the device comprises a sedimentation tank 1, a first pipeline 11, an oxidation tank 2, a second pipeline 21, a pressurized air pump 22, a first aeration tank 3, a hollow cylinder 31, a spiral baffle 32, an air baffle 33, a through pipe 34, a water outlet 35, a third pipeline 36, an aeration tank 4, a first aeration group 51, an air guide pipe 53, an aeration hole 54, a filter screen 55 and an aeration port 61.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1 to 4, fig. 4 is a sectional view of the first aeration tank 3 of the present embodiment for facilitating the observation of the groove. The embodiment comprises a sedimentation tank 1, an oxidation device 2, a first aeration tank 3 and a second aeration tank 4; the sedimentation tank 1 is connected with an oxidation device 2 through a first pipeline 11, the oxidation device 2 is connected with a first aeration tank 3 through a second pipeline 21, and the effluent of the first aeration tank 3 enters a second aeration tank 4; the first aeration tank 4 is a square tank, and a hollow cylinder 31 is arranged in the center; the first aeration tank 4 is provided with spiral baffles 32 which surround the hollow cylinder 31 and are respectively connected with the hollow cylinder 31 and the tank wall at two sides; an aeration device is arranged in the first aeration tank 3. Introducing waste gas generated by the low-temperature plasma reactor into a first aeration tank, recycling residual ozone, supplying oxygen for the survival of microorganisms, reducing the aeration quantity of a fan, degrading pollutants in the waste gas through the action of a biological aerated filter, and ensuring no pollution after gas outlet; meanwhile, the spiral baffle plate increases the moving path of the gas in the first aeration tank, prolongs the reaction time of the gas and the water body, enhances the gas utilization rate, further increases the reaction grading of harmful substances in the gas and reduces the pollutant emission. The water to be treated enters from the bottom of the first aeration tank 3, the treated water is discharged from the top to enter the second aeration tank 4, spiral ascending water flow is generated under the action of the spiral baffle 32, and the water flow sloshing can occur when the water flow passes through the four corners of the square first aeration tank 3, so that the impurities can be effectively prevented from being deposited at the corners.

The aeration device comprises a first aeration group 51; the first aeration group 51 is arranged at four corners of the first aeration tank 3 for radial aeration from outside to inside, and the aeration direction is opposite to the spiral direction of the spiral baffle 32. The first aeration groups 51 arranged at four corners of the square first aeration tank 3 further prevent the deposition of impurities and provide aeration gas for the aeration tank; furthermore, the aeration direction of the first aeration group 51 is from outside to inside along the spiral direction of the spiral baffle 32, so that the contact aeration effect with the water body can be better increased.

The aeration device also comprises a second aeration group which comprises aeration openings 61 arranged at the bottom of the first aeration tank 3. The aeration port 61 is positioned at the bottom of the first aeration tank 3 and aerates the water in the tank from bottom to top; it is conceivable that a plurality of the aeration openings 61 may be provided, and may be provided in a circular, elliptical, annular, or the like shape. The lower end face of the spiral baffle 32 is provided with a gas baffle 33, one side of the spiral baffle 32, which is close to the gas baffle 33, is provided with an upward concave groove, and the bottom of the groove is provided with a through pipe 34; the second aeration group also comprises a plurality of air ducts 53 arranged on the hollow cylinder 31, and a plurality of aeration holes 54 are arranged on the air ducts 53; the through pipe 34 is communicated with the aeration hole 54.

Because of the existence of the spiral baffle 32, the aeration gas is inevitably converged into large bubbles below the spiral baffle 32 under the action of the aeration gas, so that the contact area of the gas and the water body is reduced, and the aeration reaction effect is weakened; the air baffle 33 arranged on the lower end face of the spiral baffle 32 blocks and collects the large bubbles floating upwards along the spiral baffle 32, and the air is conveyed to the air guide pipe 53 by the buoyancy of the air through the groove and the through pipe 34 and is secondarily dispersed through the aeration holes 54. It is contemplated that the shape of air conduit 53 and the placement of aeration holes 54 may be any shape that facilitates dispersion of air into a body of water.

The groove is provided with a filter screen 55 to prevent impurities from entering and blocking the groove. The spiral baffle 32 is provided with a plurality of gas baffles 33 and a corresponding number of grooves and gas guide pipes 53. The gas baffle plates 33, the grooves and the gas guide pipes 53 greatly enhance the gas aeration effect in the first aeration tank 3, and effectively prevent the aeration effect from being weakened by the convergence of gas while the contact time of the gas and the water body is prolonged.

The oxidation device 2 is a low-temperature plasma reactor, and an air outlet of the low-temperature plasma reactor is connected with an aeration device of the first aeration tank through a check valve in a tee joint mode. The tee joint is also connected with a pressurizing air pump 22 for providing air and air pressure for the aeration device. The precipitated landfill leachate enters a low-temperature plasma reactor to remove most organic matters in the landfill leachate, and the low-temperature plasma reactor can effectively catalyze organic combination of ozone oxidation and plasma treatment; the landfill leachate treated by the low-temperature plasma enters an aeration biological filter to remove residual organic matters in water, meanwhile, the waste gas treated by the low-temperature plasma is introduced into a first aeration tank 3, residual ozone is recycled as oxygen required by the survival of microorganisms in the tank, and pollutants in the waste gas are degraded under the action of the aeration biological filter, so that the condition that no pollution is generated after gas is discharged is ensured.

The bottom of the first aeration tank 3 is provided with a water outlet 35 which can be opened and closed; two second pipelines 21 are arranged and are respectively connected with the top and the bottom of the first aeration tank 3. It is conceivable that the second duct 21 is provided with a valve for controlling the water flow; the drain port 35 arranged at the bottom can be opened when drainage or cleaning is needed, and sediment in the pool is cleaned through the water outlet of the second pipeline 21 at the top.

The drain port 35 is connected to the sedimentation tank 1 through a third pipe 36. The water body treated by the first aeration tank 3 can be cleaned regularly or the water in the tank flows back to the sedimentation tank 1 through the third pipeline 36 according to the situation and interval time, the water body added with the flocculating agent enters the sedimentation tank 1 for sedimentation circulation, and the water outlet quality of the system is further enhanced. The second aeration tank 4 is a low-speed plug-flow aeration tank. The water treated by the first aeration tank 3 enters a second aeration tank 4, and the aeration reaction is further carried out in a low-speed plug flow aeration tank to ensure high-quality effluent.

When the system works, a water body to be treated firstly enters the sedimentation tank 1, a flocculating agent and a coagulant are added, the precipitated effluent passes through the first pipeline 11 to carry out upper layer effluent, and ozone oxidation treatment is carried out through the low-temperature plasma reactor; the effluent and the waste gas after oxidation treatment enter a first aeration tank 3 for aeration, part of the aerated water body flows back, and a flocculating agent is added and then enters a sedimentation tank 1 for circulation; the effluent from the first aeration tank 3 enters the second aeration tank 4 for further aeration reaction to ensure high-quality effluent.

Claims

1. The utility model provides a landfill leachate oxidation treatment system that congeals which characterized in that: comprises a sedimentation tank (1), an oxidation device (2), a first aeration tank (3) and a second aeration tank (4); the sedimentation tank (1) is connected with an oxidation device (2) through a first pipeline (11), the oxidation device (2) is connected with a first aeration tank (3) through a second pipeline (21), and effluent of the first aeration tank (3) enters a second aeration tank (4); the first aeration tank (4) is a square tank, and a hollow cylinder (31) is arranged in the center; the first aeration tank (4) is provided with a spiral baffle (32) which surrounds the hollow cylinder (31) and the two sides of which are respectively connected with the hollow cylinder (31) and the tank wall; an aeration device is arranged in the first aeration tank (3).

2. The landfill leachate coagulating oxidation treatment system according to claim 1, wherein: the aeration device comprises a first aeration group (51); the first aeration group (51) is arranged at four corners of the first aeration tank (3) for radial aeration from outside to inside, and the aeration direction is opposite to the spiral direction of the spiral baffle (32).

3. The landfill leachate coagulating oxidation treatment system according to claim 2, wherein: the aeration device also comprises a second aeration group, and the second aeration group comprises an aeration opening (61) arranged at the bottom of the first aeration tank (3).

4. The landfill leachate coagulating oxidation treatment system according to claim 3, wherein: a gas baffle (33) is arranged on the lower end face of the spiral baffle (32), an upward concave groove is formed in one side, close to the gas baffle (33), of the spiral baffle (32), and a through pipe (34) is arranged at the bottom of the groove; the second aeration group also comprises a plurality of air ducts (53) arranged on the hollow cylinder (31), and a plurality of aeration holes (54) are arranged on the air ducts (53); the through pipe (34) is communicated with the aeration hole (54).

5. The landfill leachate coagulating oxidation treatment system according to claim 4, wherein: and a filter screen (55) is arranged at the groove.

6. The landfill leachate coagulating oxidation treatment system according to claim 5, wherein: the spiral baffle 32 is provided with a plurality of gas baffles (33) and a corresponding number of grooves and gas guide pipes (53).

7. The landfill leachate coagulating oxidation treatment system according to claim 6, wherein: the oxidation device (2) is a low-temperature plasma reactor, and an air outlet of the low-temperature plasma reactor is connected with an aeration device of the first aeration tank through a check valve in a tee joint mode.

8. The landfill leachate coagulating oxidation treatment system according to claim 7, wherein: a water outlet (35) which can be opened and closed is arranged at the bottom of the first aeration tank (3); the number of the second pipelines (21) is two, and the two second pipelines are respectively connected with the top and the bottom of the first aeration tank (3).

9. The landfill leachate coagulating oxidation treatment system according to claim 8, wherein: the water outlet (35) is connected with the sedimentation tank (1) through a third pipeline (36).

10. The landfill leachate coagulating and oxidizing treatment system according to claim 9, wherein: the second aeration tank (4) is a low-speed plug flow aeration tank.