CN215627108U

CN215627108U - Rotational flow and rotational mixing combined aerator

Info

Publication number: CN215627108U
Application number: CN202121790351.9U
Authority: CN
Inventors: 邵锡思; 邵亦乐; 周磊; 邵佳昌; 冉鹏程
Original assignee: Jiangsu Hehong Environmental Protection Technology Co ltd
Current assignee: Jiangsu Hehong Environmental Protection Technology Co ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2022-01-25
Anticipated expiration: 2031-08-03

Abstract

The utility model discloses a rotational flow and rotational mixing combined aerator, which relates to the technical field of sewage treatment equipment and comprises a rotational flow cylinder, a transition cylinder and a multi-layer sawtooth aeration head which are sequentially communicated from bottom to top, wherein a grating plate and a rotational flow cutter are sequentially arranged in the rotational flow cylinder from bottom to top, and an air inlet pipe is connected to the side wall of the rotational flow cylinder between the rotational flow cutter and the grating plate; the inner wall of the transition cylinder is provided with a spiral rising sawtooth plate, the top end of the transition cylinder is provided with an outward diffusion port, the included angle between the wall surface of the diffusion port and the horizontal plane is larger than the included angle between the wall surface of the multi-layer sawtooth aeration head and the horizontal plane, and the wall surface of the diffusion port is provided with a plurality of rotary-cut sawteeth in an arrayed mode. The utility model can fully cut the bubbles into dense small bubbles, and fully cut and mix the gas, the water and the sludge.

Description

Rotational flow and rotational mixing combined aerator

Technical Field

The utility model relates to the technical field of sewage treatment equipment, in particular to a rotational flow and rotational mixing combined aerator.

Background

Among various sewage treatment projects, the activated sludge method is mostly adopted. The sewage is filled with a proper amount of oxygen, organic matters are decomposed through oxidation, the oxygen requirement of the activated sludge for treating the waste sewage is met, the sewage is in an aerobic, anoxic or anaerobic state, and the aim of removing various organic pollutants is fulfilled through a biodegradation process. Therefore, aeration equipment is the most important component of this treatment process. The quality of aeration equipment and the operating condition directly affect the efficiency of sewage treatment and the daily operating cost, and some even affect the success or failure of the operation of the whole sewage treatment system.

The cyclone vortex-mixing aerator has the advantages of high power efficiency, strong stirring effect, low cost and the like, but the cyclone vortex-mixing aerator has the defects of low cutting efficiency of bubbles, larger bubble diameter and low oxygen utilization rate, and in addition, if sludge enters the aerator process and is provided with hard stone blocks, the internal structure of the aerator is damaged, so that the prior art is necessarily optimized in structure and performance, and the problem existing at present is solved.

Disclosure of Invention

The utility model aims to overcome the defects of the technology and provide a rotational flow and rotational mixing combined aerator which can fully cut bubbles into dense small bubbles and fully cut and mix gas, water and sludge.

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

a rotational flow and rotational mixing combined aerator is characterized by comprising a rotational flow cylinder, a transition cylinder and a multi-layer sawtooth aeration head which are sequentially communicated from bottom to top, wherein a grating plate and a rotational flow cutter are sequentially arranged in the rotational flow cylinder from bottom to top, and an air inlet pipe is connected to the side wall of the rotational flow cylinder between the rotational flow cutter and the grating plate; the inner wall of the transition cylinder is provided with a spirally-rising serrated plate, the top end of the transition cylinder is provided with an outward diffusion port, the included angle between the wall surface of the diffusion port and the horizontal plane is larger than that between the wall surface of the multi-layer serrated aeration head and the horizontal plane, and the wall surface of the diffusion port is provided with a plurality of rotary-cut serrated teeth in an upward-arranged mode.

The utility model is further improved in that the difference value between the included angle of the wall surface of the diffusion opening and the horizontal plane and the included angle of the wall surface of the multi-layer sawtooth aeration head and the horizontal plane is 30 degrees.

The cyclone cutter is further improved in that the cyclone cutter comprises a rotating shaft vertically arranged in a cyclone cylinder and a support fixed at the top in the cyclone cylinder, the top end of the rotating shaft is rotatably connected to the center of the support, and the rotating shaft is sequentially provided with a tail guide vane, a helical blade and a plurality of cutting blades from bottom to top.

The utility model has the further improvement that the cutting blades are arranged in a mutually staggered manner from top to bottom, so that the cutting effect is improved.

The utility model has the further improvement that the air outlet end of the air inlet pipe is positioned in the cyclone cylinder, the outlet of the air inlet pipe is upward, and the air outlet end of the air inlet pipe is positioned right below the bottom end of the rotating shaft.

The utility model has the further improvement that the bottom end of the rotational flow cylinder body is in an outward bell mouth shape, so that water and sludge can be better sucked.

The utility model has the further improvement that the grating plate in the cyclone cylinder is of a stainless steel structure, so that the strength is high and the service life is long.

The utility model has the beneficial effects that:

(1) the utility model combines the characteristics of the rotational flow aerator and the rotational mixing aerator, more fully cuts the bubbles, ensures more uniform distribution of the bubbles, fully mixes the gas, the water and the sludge, and effectively improves the utilization rate of the oxygen.

(2) According to the cyclone cylinder, the grating plates are arranged, so that large hard impurities entering the cyclone cylinder can be effectively filtered, the pre-cutting effect on sludge can be achieved, and the subsequent gas, water and sludge mixing efficiency is improved.

(3) According to the utility model, the transition cylinder is arranged, the spiral rising-shaped sawtooth plates in the transition cylinder are utilized, so that a gas-liquid mixture rotates and rises in the transition cylinder, a cutting effect is achieved, and the rotating mixture contacts the multi-layer sawtooth aeration heads, so that the bubble cutting and mixing processes are more uniform and sufficient.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the structure in the direction of a-a in fig. 1.

In the figure: the cyclone cylinder body 1, the transition cylinder body 2, the multi-layer sawtooth aeration head 3, the grating plate 4, the cyclone cutter 5, the air inlet pipe 6, the sawtooth plate 7, the diffusion opening 8, the rotary-cut sawtooth 9, the rotating shaft 51, the bracket 52, the tail guide vane 53, the helical blade 54 and the cutting blade 55.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

As shown in fig. 1-2, a rotational flow and rotational mixing combined aerator comprises a rotational flow cylinder 1, a transition cylinder 2 and a multi-layer sawtooth aeration head 3 which are sequentially communicated from bottom to top, wherein a grating plate 4 and a rotational flow cutter 5 are sequentially arranged in the rotational flow cylinder 1 from bottom to top, and an air inlet pipe 6 is connected to the side wall of the rotational flow cylinder 1 between the rotational flow cutter 5 and the grating plate 4; the inner wall of the transition cylinder body 2 is provided with a spiral rising-shaped sawtooth plate 7, the top end of the transition cylinder body 2 is provided with an outward diffusion opening 8, the included angle between the wall surface of the diffusion opening 8 and the horizontal plane is larger than the included angle between the wall surface of the multi-layer sawtooth aeration head 3 and the horizontal plane, and the wall surface of the diffusion opening 8 is provided with a plurality of rotary-cut sawteeth 9 in an upward row.

Specifically, the difference between the included angle of the wall surface of the diffusion opening 8 and the horizontal plane and the included angle of the wall surface of the multi-layer sawtooth aeration head 3 and the horizontal plane is 30 degrees.

Specifically, the cyclone cutter 5 comprises a rotating shaft 51 vertically arranged in the cyclone cylinder 1 and a bracket 52 fixed at the inner top of the cyclone cylinder 1, the top end of the rotating shaft 51 is rotatably connected to the center of the bracket 52, and the rotating shaft 51 is sequentially provided with a tail guide vane 53, a helical blade 54 and a plurality of cutting blades 55 from bottom to top.

Specifically, the cutting blades 55 are staggered from top to bottom, so as to improve the cutting effect.

Specifically, the air outlet end of the air inlet pipe 6 is located in the cyclone cylinder 1, the outlet of the air inlet pipe faces upward, and the air outlet end of the air inlet pipe 6 is located right below the bottom end of the rotating shaft 51.

Specifically, the bottom end of the rotational flow cylinder 1 is in an outward bell mouth shape, so that water and sludge can be better sucked.

Specifically, the grating plate 4 in the cyclone cylinder 1 is of a stainless steel structure, and has high strength and long service life.

The principle is as follows: through aeration, the density of the mixed liquid in the aerator is reduced, and a density difference is formed between the liquid inside and the liquid outside the aerator, so that the external sludge-water mixed liquid is sucked into the aerator from top to bottom and is mixed with the introduced air.

The described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims

1. A rotational flow and rotational mixing combined aerator is characterized by comprising a rotational flow cylinder, a transition cylinder and a multi-layer sawtooth aeration head which are sequentially communicated from bottom to top, wherein a grating plate and a rotational flow cutter are sequentially arranged in the rotational flow cylinder from bottom to top, and an air inlet pipe is connected to the side wall of the rotational flow cylinder between the rotational flow cutter and the grating plate; the inner wall of the transition cylinder is provided with a spirally-rising serrated plate, the top end of the transition cylinder is provided with an outward diffusion port, the included angle between the wall surface of the diffusion port and the horizontal plane is larger than that between the wall surface of the multi-layer serrated aeration head and the horizontal plane, and the wall surface of the diffusion port is provided with a plurality of rotary-cut serrated teeth in an upward-arranged mode.

2. The combined aeration apparatus of claim 1, wherein the difference between the angle between the wall of the diffuser and the horizontal plane and the angle between the wall of the multi-layered sawtooth aeration head and the horizontal plane is 30 °.

3. The rotational flow and rotational mixing combined aerator according to claim 1, wherein the rotational flow cutter comprises a rotating shaft vertically arranged in the rotational flow cylinder and a bracket fixed at the inner top of the rotational flow cylinder, the top end of the rotating shaft is rotatably connected to the center of the bracket, and the rotating shaft is sequentially provided with a tail guide vane, a helical vane and a plurality of cutting vanes from bottom to top.

4. The combined cyclonic and rotational mixing aerator of claim 3, wherein the cutting blades are staggered from top to bottom.

5. The combined rotational flow and rotational mixing aerator according to claim 1, wherein the air outlet end of the air inlet pipe is positioned in the rotational flow cylinder and the outlet of the air inlet pipe faces upwards, and the air outlet end of the air inlet pipe is positioned right below the bottom end of the rotating shaft.

6. A combined cyclonic and rotational mixing aerator as claimed in claim 1, wherein the bottom end of the cyclone cylinder is flared outwardly.

7. The combined cyclone-cyclonic aerator of claim 1 wherein the grid plates in the cyclone cylinder are of stainless steel construction.