CN217323544U

CN217323544U - High-efficient spiral-flow aeration ware

Info

Publication number: CN217323544U
Application number: CN202221157961.XU
Authority: CN
Inventors: 何小娟
Original assignee: Shanghai Water Partner Environmental Engineering Co ltd
Current assignee: Shanghai Water Partner Environmental Engineering Co ltd
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2022-08-30
Anticipated expiration: 2032-05-16

Abstract

The utility model discloses a high-efficiency rotational flow aerator which is suitable for a biochemical tower and comprises a water inlet, a gas-water mixing area, a diffusion pipe and an outlet which are connected in sequence; the gas-water mixing area adopts a cylindrical structure, the inner wall of the gas-water mixing area is provided with an irregular strip shape, and the gas inlet is tangentially arranged at one side of the mixing area; the sewage distribution pipe and the air distribution pipe are provided with a plurality of sewage branch pipes and air branch pipes, the water inlet is connected with the sewage branch pipes on the sewage distribution pipe, and the air inlet is connected with the air branch pipes on the air distribution pipe. The utility model discloses the setting is in biochemical tower, through set up air inlet and water inlet respectively on mixing area, makes gas-liquid intensive mixing, striking, becomes the microbubble with the air-cut. Meanwhile, the diffusion pipe is arranged to be of a variable cross section, so that a gas-liquid mixture forms high-speed flow, oxygen is provided for microorganisms in the biochemical tower, and meanwhile, sufficient mixing power is provided for the muddy water mixed liquid. The device has the advantages of large aeration quantity, no blockage, no maintenance, corrosion resistance and the like, and the service life is more than 20 years.

Description

High-efficient spiral-flow aerator

Technical Field

The utility model relates to a sewage treatment field, especially a high-efficient whirl aerator can be applied to the biochemical treatment of various sewage.

Background

The biological treatment is to decompose organic pollutants in the sewage into carbon dioxide and water under aerobic conditions by using microorganisms, thereby achieving the purpose of purifying the sewage. It has the advantages of simple treatment facilities, good effluent quality, low treatment cost, environmental protection and the like, and is the most common sewage treatment process. The main facility of biological treatment is biochemical pond, and traditional biochemical pond adopts reinforced concrete structure, and the effective depth of water is generally 5 ~ 6 meters. Due to the low rate of biodegradation reaction, the hydraulic retention time of the sewage in the biochemical pond is longer. For low-concentration and easily-degradable domestic sewage, the retention time is from several hours to hour; for the chemical wastewater difficult to degrade, the retention time is often dozens of hours. Therefore, the traditional biochemical pool has the problems of large volume and large occupied area.

To reduce the volume of the biochemical pool, the current research efforts are mainly focused on how to increase the amount of microorganisms in the biochemical pool, such as: a biological film technology for filling a biological carrier with a larger specific surface area in a biochemical pool to improve the microbial biomass in unit volume; and a Membrane Bioreactor (MBR) and the like which adopt an ultrafiltration membrane to replace a secondary sedimentation tank and intercept the activated sludge to the maximum extent so as to improve the concentration of the activated sludge in the biochemical tank. The technologies have better effects on reducing the volume of the biochemical pool and saving the occupied area. However, the bio-carrier and the MBR membrane not only increase the engineering investment, but also have costs in maintenance and replacement, and increase the difficulty of operation management.

In addition, the treatment cost of the biological treatment system mainly comes from electricity consumption, and accounts for about 60% -80%; the aeration fan is the largest electric equipment, and the power consumption of the aeration fan can account for more than 80 percent of the total power consumption of the biological treatment system. The adoption of a high-efficiency magnetic suspension fan and an air suspension fan is one of the ways of saving the power consumption of the aeration fan, and the improvement of the oxygen utilization rate of the biochemical pool is another important way of reducing the power consumption. Because the oxygen utilization rate is improved along with the increase of the water depth of the biochemical pool, the oxygen utilization rate can be greatly improved by increasing the effective water depth of the biochemical pool, namely the aeration air volume is greatly reduced. Although the increase of the water depth needs to improve the pressure rise of the aeration fan, the comprehensive energy consumption is greatly reduced. Therefore, the adoption of the biochemical tower to replace the traditional biochemical tank is a great technical innovation in the field of sewage treatment.

A plurality of biochemical towers invention patents or utility model patents are disclosed in China, but the biochemical towers have the problems of complex structure, high equipment investment, difficult maintenance, low aerator efficiency and the like, or the biochemical towers are divided into an anoxic zone, an aerobic zone and a sedimentation zone from bottom to top, the water depth of an aerobic reaction tank is not increased, and only the effect of saving the occupied area is achieved, and the aeration energy consumption is not reduced. Such as:

an aeration biochemical tower with patent number ZL 02268427.1 adopts a grid plate to divide a tower body into an upper half part and a lower half part, and a comet ball is filled in the middle. The method is a biomembrane process and has the problems of filler blockage and difficult maintenance and replacement.

The patent No. ZL 201610428935.9 'tower aerobic degradation reactor' comprises an upper aerobic degradation zone and a lower anoxic reaction zone, and an aeration system is arranged 4-5 m below the water surface of the reactor. The water depth of the aerobic zone of the reactor is not different from that of the traditional biochemical pool, the saved occupied area is limited, and the energy-saving effect is not realized.

The patent number is ZL 200820146102.4 "overhead jet aeration biochemical tower", including interior barrel, outer barrel, sprayer and circulating pipe, the air inlet has been seted up at the top of sprayer, inhales the air by the inside negative pressure that produces of sprayer. Because the bubble diameter that the jet aeration produces is large, the oxygen utilization rate is the lowest in various aeration types, so the power consumption of this biochemical tower is large; in addition, the air density is low, and when the air-water mixed liquid is sprayed downwards from the top, air bubbles are difficult to reach the lower part of the biochemical tower, so that the lower mixed liquid is anoxic.

The patent No. 201910738714.5 discloses an energy-saving tower type internal circulation reactor, which comprises an inner tower, an outer tower, a water inlet and distribution pipe and a water production pipe, wherein an MBR (membrane bioreactor) membrane reaction unit is arranged at the upper end inside the inner tower, an aerobic biomembrane reaction zone, an anoxic anaerobic biomembrane reaction zone and a mud pool zone are arranged between the outer tower and the inner tower, aerobic biofilm reaction zone is filled with aerobic biofilm filler, and the anoxic anaerobic biomembrane reaction zone is filled with anoxic anaerobic biofilm filler. It is a combination of a biofilm process and a membrane bioreactor, and has the following defects: the biological filler is easy to block and difficult to maintain and replace; the ultrafiltration membrane needs frequent cleaning and backwashing, the operation management is complex and the cost is high; the aerator is positioned under the MBR membrane reaction unit, the water depth is lower, the oxygen utilization rate is not high, and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high-efficient spiral-flow aerator that has advantages such as aeration rate is big, no jam, non-maintaining, corrosion-resistant, long service life.

In order to realize the purpose, the utility model adopts the following technical scheme:

a high-efficiency rotational flow aerator is suitable for a biochemical tower and comprises a water inlet, a gas-water mixing area, a diffusion pipe and an outlet which are connected in sequence; the gas-water mixing area adopts a cylindrical structure, the inner wall of the gas-water mixing area is provided with an irregular strip shape, and one side of the gas-water mixing area is tangentially provided with a gas inlet; still include sewage distribution pipe and air distribution pipe, be equipped with a plurality of sewage branch pipes and air distribution pipe on sewage distribution pipe and the air distribution pipe, the water inlet is connected with the sewage branch pipe on the sewage distribution pipe, and the air inlet is connected with the air distribution pipe on the air distribution pipe.

Preferably, the diffuser pipe adopts the variable cross section, the upper portion of diffuser pipe adopts circular structure, the transition of the lower part of diffuser pipe is prolate shape and connects the export.

Preferably, the high-efficiency cyclone aerator is made of polypropylene materials.

The utility model discloses the setting is in biochemical tower, through set up air inlet and water inlet respectively on mixing area, makes gas-liquid intensive mixing, striking, becomes the microbubble with the air-cut. Meanwhile, the diffusion pipe is arranged to be of a variable cross section, so that a gas-liquid mixture forms high-speed flow, oxygen is provided for microorganisms in the biochemical tower, and meanwhile, sufficient mixing power is provided for the muddy water mixed liquid. The utility model has the advantages of large aeration quantity, no blockage, no maintenance, corrosion resistance and the like, and the service life is more than 20 years.

Drawings

FIG. 1 is a schematic structural view of a high-efficiency spiral-flow aerator according to the present invention;

fig. 2 is a schematic structural diagram of the application of the high-efficiency rotational flow aerator in the biochemical tower.

Reference numbers in the figures:

1. an outer cylinder of the biochemical tower; 2. an inner barrel; 3. a high-efficiency rotational flow aerator; 4. a sewage distribution pipe; 5. an air distribution duct; 6. a sewage branch pipe; 7. an air branch pipe; 11. a sewage inlet 12, an air inlet; 13. a sludge outlet; 14. an observation hole; 15. a breather valve 16, an exhaust gas outlet; 17. a water outlet; 18. a manhole; 19. an aeration fan; 20. a sewage pump; 21. a support; 30. a sludge discharge pipe; 31. a water inlet; 32. an air inlet; 33. a gas-water mixing area; 34. a diffuser tube; 35. and (7) an outlet.

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.

The utility model is arranged in the inner cylinder of the biochemical tower, the biochemical tower in the prior art is shown in figure 2 and comprises an outer cylinder 1 of the biochemical tower, an inner cylinder 2, a high-efficiency cyclone aerator 3, a sewage distribution pipe 4 and an air distribution pipe 5; the top of the outer cylinder 1 of the biochemical tower is provided with an arched cover plate, the arched cover plate is provided with an observation hole 14, a breather valve 15 and a waste gas outlet 16, and the observation hole 14 is convenient for observing the mixing condition, the aeration condition, the mud-water separation effect and the like in the tower. The breather valve 15 is used for sucking or breathing a certain amount of air when sewage enters or exits and the temperature rises and falls, so as to prevent overpressure or negative pressure from being generated in the tower; the waste gas outlet 16 can prevent the waste gas in the tower from being emitted to the atmosphere, and ensure that all the waste gas enters the waste gas treatment system for treatment according to the direction of an arrow D on figure 2; and meanwhile, external clean air is prevented from entering the waste gas treatment system. The side wall of the outer cylinder 1 of the biochemical tower is respectively provided with a sewage inlet 11, an air inlet 12, a sludge outlet 13, a water outlet 17 and a manhole 18. An inner cylinder 2 is arranged in the outer cylinder 1 of the biochemical tower, the inner cylinder 2 is arranged in the outer cylinder 1 of the biochemical tower through a support 21, one side of the inner cylinder 2 is connected with a water outlet 17, and biochemical wastewater is beaten out of the outer cylinder 1 of the biochemical tower according to the arrow B direction. The bottom of the inner cylinder 2 is connected with a sludge outlet 13 through a sludge discharge pipe 30, and an output port of the sludge outlet 13 is connected with a straight line. The bottom of the outer barrel 1 of the biochemical tower is provided with a sewage distribution pipe 4 and an air distribution pipe 5, the sewage distribution pipe 4 and the air distribution pipe 5 are respectively provided with a plurality of sewage branch pipes 6 and air branch pipes 7, and each sewage branch pipe 6 and each air branch pipe 7 are connected with a group of high-efficiency cyclone aerators 3.

As shown in fig. 1, the high-efficiency cyclone aerator 3 provided by the present invention comprises a water inlet 31, a gas-water mixing zone 33, a diffusion pipe 34 and an outlet 35 which are connected in sequence; the gas-water mixing area 33 is of a cylindrical structure, the inner wall of the gas-water mixing area 33 is provided with irregular strips, and the gas inlet 32 is tangentially arranged on one side of the mixing area 33; the sewage distribution pipe 4 and the air distribution pipe 5 are provided with a plurality of sewage branch pipes 6 and air branch pipes 7, the water inlet 31 is connected with the sewage branch pipes 6 on the sewage distribution pipe 4, and the air inlet 32 is connected with the air branch pipes 7 on the air distribution pipe 5. The air distribution pipe 5 tangentially enters the mixing zone 33 from the air inlet 32, the air and the liquid are fully mixed and collided, and the air is cut into small bubbles;

furthermore, the diffuser pipe 34 has a variable cross section, the upper part of the diffuser pipe 34 has a circular structure, and the lower part of the diffuser pipe 34 is in a transition shape of a flat long shape and is connected with the outlet 35. The gas-liquid mixture forms high-speed flow, so that oxygen is provided for microorganisms in the biochemical tower, and meanwhile, sufficient mixing power is provided for the muddy water mixed liquor; the flow channel is wide, so that blockage is avoided, the aeration rate is high, when the aeration rate of each aerator can reach 50-100 m3/h, the pipeline is simple, and the installation is convenient; furthermore, the high-efficiency rotational flow aerator is made of polypropylene materials.

The utility model discloses a theory of operation as follows:

after being pressurized by an external sewage pump 20, the sewage A to be treated and the sludge returned from the sludge discharge pipe 30 enter the outer cylinder 1 of the biochemical tower through a sewage inlet 11; air is compressed by an external aeration fan 19 and then enters the outer cylinder 1 of the biochemical tower through an air inlet 12; sewage and return sludge enter a mixing zone 33 through a water inlet 31 connected with a sewage distribution pipe 4, air tangentially enters the mixing zone 33 through an air inlet 32 connected with an air distribution pipe 5, the air and the liquid are fully mixed and impacted, and the air is cut into small bubbles; then enters the outer cylinder 1 of the biochemical tower from the outlet 35, the mixed liquid and the return sludge in the biochemical tower are rich in microorganisms, organic pollutants in the sewage to be treated are degraded into carbon dioxide and water by the microorganisms under the action of oxygen, and ammonia nitrogen is oxidized into nitrate nitrogen, so that the aim of purifying the sewage is fulfilled. The mixed liquid after biochemical degradation enters the inner cylinder 2, and mud and water are separated under the action of gravity: the sludge with high density sinks to the cone hopper, is discharged out of the biochemical tower through the sludge outlet 13 by the sludge discharge pipe 30, part of the sludge is discharged as residual sludge in the arrow C direction, and part of the sludge flows back to the biochemical tower by the sewage pump; the water with lower density is discharged out of the biochemical tower outer cylinder 1 through the water outlet 17 in the direction of an arrow B at the upper part.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element 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.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A high-efficiency rotational flow aerator is suitable for a biochemical tower and is characterized by comprising a water inlet (31), a gas-water mixing area (33), a diffusion pipe (34) and an outlet (35) which are connected in sequence; the gas-water mixing area (33) is of a cylindrical structure, the inner wall of the gas-water mixing area (33) is provided with irregular strips, and one side of the gas-water mixing area (33) is tangentially provided with a gas inlet (32); still include sewage distribution pipe (4) and air distribution pipe (5), be equipped with a plurality of sewage branch pipes (6) and air branch pipe (7) on sewage distribution pipe (4) and air distribution pipe (5), water inlet (31) are connected with sewage branch pipe (6) on sewage distribution pipe (4), and air inlet (32) are connected with air branch pipe (7) on air distribution pipe (5).

2. A high efficiency spiral flow aerator as claimed in claim 1, characterised in that the diffuser pipe (34) is of variable cross-section, that the upper part of the diffuser pipe (34) is of circular configuration, and that the lower part of the diffuser pipe (34) transitions in oblong form and is connected to the outlet (35).

3. A high efficiency spiral-flow aerator as claimed in any one of claims 1 or 2, wherein said high efficiency spiral-flow aerator is made of polypropylene material.