CN106116015B - A cyclone mixed wastewater treatment aerobic reactor - Google Patents

Abstract

An aerobic reactor for swirling mixed wastewater treatment, including a pool body, a water distributor, and an aeration device. Separation cover, the gas-liquid separation cover is provided with an exhaust port protruding from the sedimentation filter area, and a rising flow gap is provided between the gas-liquid separation cover and the inner wall of the tank; at least one set of Water distributor and a group of aeration devices, the water distributor is located below the aeration device, each group of water distributors and aeration devices are alternately arranged at intervals, each group of water distributors is connected to the waste water pipe, each group of aeration devices Connect with aeration pipe. The reactor adopts rotary water distribution and all-round aeration, so that the wastewater can participate in mass transfer as soon as it enters the reactor. Water distribution and aeration are carried out alternately. It is more violent, greatly improving the mass transfer efficiency, low energy consumption, high efficiency, and stable effluent quality.

Description

A cyclone mixed wastewater treatment aerobic reactor

technical field

The invention relates to an aerobic reaction device used in the biochemical treatment stage in the waste water treatment process, and belongs to the technical field of waste water aerobic reaction treatment.

Background technique

The aerobic biological treatment of wastewater is to use aerobic microorganisms to carry out biological metabolism in the presence of oxygen to degrade organic matter and make it stable and harmless. Various aerobic reaction wastewater treatment technologies currently used have disadvantages such as large investment, long construction period, and complicated operation and management, and it is difficult to apply to high-concentration water quality and sewage with poor biochemical properties.

The currently commonly used aerobic reactor includes a reactor shell, several three-phase separators arranged in layers in the reactor shell, a gas-liquid separator set at the top outside the reactor shell, and a gas-liquid separator located in the reactor shell. Water distributor and aeration device at the bottom. The three-phase separator communicates with the gas-liquid separator through an air-lift pipe, and the gas-liquid separator is provided with a return pipe leading downward to the bottom of the reactor shell. When working, the lower part of the reactor shell is filled with sludge, and the external waste water inlet pipe is connected to the water distributor to realize water distribution, agitate the sludge and mix with it, organic matter and sludge contact and mass transfer, through the aeration device for Aerobic microorganisms provide oxygen, the mixed liquid rises to the three-phase separator and is blocked, then the gas-water mixture enters the gas-liquid separator along the gas-lift tube, the biogas is separated, and the remaining liquid falls back to the reactor shell along the return pipe body interior. The structure of the reactor with this structure is complicated, and the treatment effect is poor.

The "three-stage circulating aerobic reactor" disclosed in Chinese patent document CN103332784A and the "multi-stage gas lift and separation integrated aerobic granular sludge reactor" disclosed in CN103880167A have many advantages, but they are still mixed by gas lift For liquid circulation and mass transfer, a gas-liquid separator needs to be installed, the structure is complex, and the processing efficiency and effect need to be improved.

Contents of the invention

Aiming at the shortcomings of the existing aerobic bioreactors, the present invention provides a swirling mixed wastewater with simple structure, intense mass transfer, greatly improved treatment efficiency and effect, no water inlet clogging phenomenon, high treatment efficiency and good effect Treat the aerobic reactor.

The cyclone mixed wastewater treatment aerobic reactor of the present invention adopts the following technical scheme:

The aerobic reactor includes a tank body, a water distributor and an aeration device. The upper end of the tank body is open, the bottom of the tank body is provided with a mud discharge pipe, and the upper part of the tank body is provided with a sedimentation filter area. There is a filter layer, a water outlet weir is set above the sedimentation filter area, and a water outlet pipe is arranged on the water outlet weir; a gas-liquid separation cover is installed below the sedimentation filter area, and an exhaust port extending out of the sedimentation filter area is arranged on the gas-liquid separation cover , there is a riser gap between the gas-liquid separation cover and the inner wall of the tank; at least one set of water distributor and one set of aeration device are arranged between the mud discharge pipe and the gas-liquid separation cover, and the water distributor is located below the aeration device , each group of water distributors and aeration devices are alternately arranged at intervals, each group of water distributors is connected to the waste water pipe, and each group of aeration devices is connected to the aeration pipe.

The water distributor includes a water distribution body, a water distribution branch pipe and a water distribution nozzle. The water distribution body is radially distributed with a water distribution branch pipe (in a radial shape), and a water distribution nozzle is distributed on the water distribution branch pipe. The nozzles are facing the same direction (clockwise or counterclockwise).

The aeration device includes an aeration distribution body and an aeration branch pipe. The aeration distribution body is radially distributed with an aeration branch pipe (in a radial shape), and the aeration branch pipe is distributed with a horizontal aeration head and a vertical aeration head.

The waste water is sprayed out through the water distribution nozzles along the water distribution branch pipes in each water distributor, and sprays out radially to the surroundings, generating an uninterrupted rotating liquid flow, so that the waste water and sludge can fully contact and transfer mass. Compressed air enters each aeration device through the aeration pipe, and is sprayed into the mud-water mixture by the horizontal and vertical aeration heads on the aeration branch pipe. mass transfer. After the mud-water mixture rises to the gas-liquid separation cover, the gas-liquid separation is realized, and the excess gas is discharged from the exhaust port. The clear liquid is filtered through the filtration area of the sedimentation area and enters the outlet weir, and then discharged out of the pool along the outlet pipe.

The invention adopts rotary water distribution and all-round aeration, so that the waste water participates in mass transfer as soon as it enters the reactor, and the water distribution is uniform, and the water distribution and aeration are carried out alternately, and the waste water participates in the whole process from bottom to top in the reactor. Mass, mud-water mixing is more sufficient, mass transfer is more intense, greatly improving mass transfer efficiency, low energy consumption, high efficiency, and stable effluent quality. At the same time, the gas-water separator arranged on the top of the existing reactor is omitted, and the muddy water overflow phenomenon is avoided.

Description of drawings

Fig. 1 is a schematic structural view of the aerobic reactor for treating swirling mixed wastewater of the present invention.

Fig. 2 is a schematic structural view of the swirl water distributor in the present invention.

Fig. 3 is a schematic structural view of the aeration device in the present invention.

In the figure: 1. Tank body, 2. Mud discharge pipe, 3. Water distributor, 4. Aeration device, 5. Waste water pipe, 6. Aeration pipe, 7. Sedimentation filter area, 8. Outlet pipe, 9. Outlet weir, 10, gas-liquid separation cover, 11, exhaust port, 12, water distribution distribution body, 13, water distribution branch pipe, 14, water distribution nozzle, 15, aeration distribution body, 16, aeration branch pipe, 17, Horizontal aeration head, 18, vertical aeration head.

Detailed ways

As shown in FIG. 1 , the aerobic reactor for swirling mixed wastewater treatment of the present invention mainly includes a pool body 1 , a water distributor 3 and an aeration device 4 . The upper end of the tank body 1 is open, and the bottom of the tank body 1 is provided with a mud discharge pipe 2. A control valve can be installed on the mud discharge pipe 2 to form a mud discharge system. When discharging mud, open the control valve and discharge it by self-pressure. The upper part of the pool body 1 is provided with a sedimentation filter area 7, and a polyurethane filter layer is arranged in the sedimentation filter area 7, and an outlet weir 9 is arranged above the sedimentation filter area 7, and an outlet pipe 8 is arranged on the outlet weir 9. A gas-liquid separation cover 10 is provided below the sedimentation filtration area 7 , and an exhaust port 11 protruding from the sedimentation filtration area 7 is provided on the gas-liquid separation cover 10 . An upflow slot is provided between the gas-liquid separation cover 10 and the inner wall of the cell body 1 .

Between the mud discharge pipe 2 and the gas-liquid separation cover 10, at least one group of water distributors 3 and one group of aeration devices 4 are arranged, and the water distributors 3 are located below the aeration devices 4. The devices 4 are alternately arranged at intervals. Each group of water distributors 3 is connected to the waste water pipe 5 . Each group of aeration devices 4 is connected with an aeration pipe 6 .

The structure of the water distributor 3 is shown in FIG. 2 , including a water distribution body 12 , a water distribution branch pipe 13 and a water distribution nozzle 14 . The water distribution body 12 is connected to the waste water pipe 5 . On the water distribution distribution body 12, there are radially distributed water distribution branch pipes 13, and a water distribution nozzle 14 is distributed on one side of the water distribution branch pipe 13. clockwise or counterclockwise).

The structure of the aeration device 4 is shown in FIG. 3 , including an aeration distribution body 15 and an aeration branch pipe 16 , and the aeration distribution body 15 is connected to the aeration pipe 6 . Aeration branch pipes 16 are radially distributed on the aeration distribution body 15 , and horizontal aeration heads 17 and vertical aeration heads 18 are distributed on the aeration branch pipes 16 .

The operation process of the above-mentioned reactor is as follows:

The waste water enters each water distributor 3 through the waste water pipe 13, and is sprayed out through the water distribution nozzle 14 along the water distribution branch pipe 13, and is sprayed radially to the surroundings, generating an uninterrupted rotating liquid flow, and the waste water can flow in the entire reactor. Achieve uniform distribution, and under the impetus of water inlet power, granular sludge and wastewater move in the same direction. Under the same thrust, due to the different density of wastewater and granular sludge, their flow rates will also be different, which is Make the wastewater and sludge more fully contact and mass transfer.

At the same time, compressed air enters each aeration device 4 through the aeration pipe 6, enters each aeration branch pipe 16 through the aeration distribution body 15, and sprays the mud-water mixture from the horizontal and vertical aeration heads on the aeration branch pipe 16. In the process, on the one hand, air is provided for the microorganisms, on the other hand, the mud-water mixture is stirred, and the mass transfer is violent.

The rotating water distribution and all-round aeration make the mud water mix more fully, and the wastewater in the reactor participates in the mass transfer from bottom to top, and the mass transfer is more intense, which greatly improves the mass transfer efficiency. High-concentration organic wastewater is in full contact with microorganisms in a short period of time, providing sufficient nutrients for the rapid reproduction of particulate matter, and promoting biological reproduction. At the same time, with the help of high-speed shearing and scouring, the mixing efficiency and mass transfer efficiency are greatly improved. Oxygen granular sludge, microorganisms and organic pollutants are fully adsorbed and degraded, and participate in the removal of pollutants.

After the muddy water mixture rises to the gas-liquid separation cover 10, the gas-liquid separation is realized. The treated waste water rises from the upflow gap between the gas-liquid separation cover 10 and the inner wall of the tank body 1, and the excess gas is discharged from the exhaust port 11. The granular sludge is prevented from falling by the gas-liquid separation cover 10 . The clear liquid is filtered through the filter area 7 of the sedimentation area and enters the outlet weir 9, and then discharged out of the pool along the outlet pipe 8. The sludge settles to the bottom of the pool under the action of gravity, and is regularly discharged out of the pool through the mud discharge pipe 2.

Claims (1)

1. An aerobic reactor for swirling mixed wastewater treatment, including a tank body, a water distributor and an aeration device, the upper end of the tank body is open, the bottom of the tank body is provided with a sludge discharge pipe, and the upper part of the tank body is provided with a sedimentation Filtration area, a filter layer is provided in the sedimentation filtration area, a water outlet weir is arranged above the sedimentation filtration area, and a water outlet pipe is arranged on the outlet weir; the characteristics are: a gas-liquid separation cover is arranged below the sedimentation filtration area, and the gas-liquid separation cover There is an exhaust port protruding from the sedimentation filter area on the top, and there is a riser gap between the gas-liquid separation cover and the inner wall of the tank; at least two sets of water distributors and two sets of water distributors are set between the mud discharge pipe and the gas-liquid separation cover Aeration device, the water distributor is located below the aeration device, each group of water distributors and aeration devices are alternately arranged at intervals, each group of water distributors is connected to the waste water pipe, and each group of aeration devices is connected to the aeration pipe; The water distributor includes a water distribution body, a water distribution branch pipe and a water distribution nozzle. The water distribution branch pipe is radially distributed on the water distribution body, and the water distribution nozzle is distributed on the water distribution branch pipe. All the water distribution nozzles are in the same direction; The aeration device includes an aeration distribution body and an aeration branch pipe, the aeration distribution body is radially distributed with an aeration branch pipe, and the aeration branch pipe is distributed with a horizontal aeration head and a vertical aeration head; The wastewater is sprayed out through the water distribution nozzles along the water distribution branch pipes in each water distributor, and is sprayed radially to the surroundings, generating an uninterrupted rotating liquid flow, which makes the wastewater and sludge more fully contact and mass transfer; compressed air It enters each aeration device through the aeration pipe, and is sprayed into the mud-water mixture by the horizontal and vertical aeration heads on the aeration branch pipe. On the one hand, it provides air for the microorganisms, on the other hand, it stirs the mud-water mixture, and the mass transfer is violent. The mud-water mixture rises to the gas-liquid separation cover to realize gas-liquid separation, the excess gas is discharged from the exhaust port, and the clear liquid is filtered through the filtration area of the sedimentation area and enters the outlet weir, and then discharged out of the pool along the outlet pipe.

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