WO2022083800A1

WO2022083800A1 - Suspended rotary disc aerator for small river course and treatment method thereof

Info

Publication number: WO2022083800A1
Application number: PCT/CN2022/071092
Authority: WO
Inventors: 凌建军; 刘会平; 张冬; 闾雪娇
Original assignee: 凌志环保股份有限公司; 江苏凌志环保工程有限公司; 凌志环保临泉有限公司
Priority date: 2021-07-26
Filing date: 2022-01-10
Publication date: 2022-04-28
Also published as: ZA202201932B; CN113666487A

Abstract

Disclosed in the present invention is a suspended rotary disc aerator device for a small river course. A rotary disc aerator is arranged on a suspended base, the rotary disc aerator comprises a rotating shaft, a driving device and rotary discs arranged on the rotating shaft in a sleeved manner at intervals, the suspended base is composed of at least one platform-shaped base body, an aeration area is arranged on the suspended base, rotary disc plates are immersed into a river course from the aeration area, the aeration area spans the river course in the width direction, and the suspended base is in a dam-type interception shape in the river course. For the small river course, the entire water body of the river course is subjected to plug flow, so that the aeration oxygenation can be effectively realized, and mixing and plug flow functions are also realized.

Description

A kind of suspended rotary disc aerator for small river channel and its treatment method

technical field

The invention relates to the field of sewage treatment, in particular to an aeration device for waters where rivers or water bodies do not flow.

Background technique

With social development and population growth, urban industrial wastewater, domestic sewage, rural agricultural non-point source sewage, and aquaculture wastewater are discharged at will without treatment, resulting in the content of nitrogen, phosphorus, nutrients, and organic matter in the water body that greatly exceeds the self-purification capacity of the water body itself. . The degradation of organic matter requires a large amount of dissolved oxygen, which can easily lead to the formation of an anoxic-anaerobic environment in the water body. In this environment, it is not completely decomposed to produce volatile organic substances such as ammonia nitrogen and hydrogen sulfide, which further causes the black and odorous phenomenon of the water body. At the same time, the strong reduction performance of the water body is not suitable for the survival of aquatic organisms, resulting in the degradation or even extinction of aquatic vegetation.

Reoxygenation of river water mainly takes the following forms: (1) oxygen in the atmosphere enters the water body through the exchange of gas-liquid interface, the initial rate is high, then gradually decreases and finally reaches equilibrium; (2) the aquatic plants containing photosynthetic pigments in the water body Photosynthesis with algae produces oxygen; (3) artificial oxygenation.

However, the above-mentioned methods have limited effect on the treatment of the river, because the effective water circulation cannot be formed. If the conventional construction method is used to pump and transfer the sludge in the entire river bed, although the treatment effect is rapid and obvious, at least It needs several million, the construction cost is high, and in the process of urban river construction, there are huge safety hazards, which also affects the lives of ordinary people.

technical problem

The existing artificial oxygenation methods are generally through aeration pipes or microporous aerators or push-flow aerators, generally using fixed installation methods and the application scenario is sewage treatment oxidation ditch tank, which has not been applied yet. The situation of entering the river cannot meet the requirements of treating organic pollutants in various black and odorous water bodies and making their concentration indicators meet the standards and operate stably.

Even if it is popularized and applied in the river course and installed on the suspension device, it adopts the method of setting local points on the water body surface to carry out local aeration on the water body surface, which cannot effectively form the push flow of the whole river channel water body, and the water in the whole river channel is still at rest. In addition, the aeration of the aeration tube or the microporous aerator or the push-flow aerator only plays the role of oxygenation, and cannot play the role of mixing, and its push-flow effect is poor, and it has a poor effect on the treatment of the river. Extremely limited and needs further improvement.

technical solutions

Aiming at the deficiencies of the prior art, the present invention provides a small-sized river channel with a suspended rotary disc aerator, which can push the water body of the river channel as a whole, which can not only effectively aerate and aerate the water, but also play the role of mixing and pushing the flow. Gas machine and its treatment method.

In order to achieve the purpose of the present invention, the following technical solutions are provided: a small-sized floating rotary disc aerator for river channels, comprising a suspended base, characterized in that the rotary disc aerator is installed on the suspended base, and the rotary disc aerator is installed on the suspended base. The aerator includes a rotating shaft, a driving device and a rotating disc sleeved on the rotating shaft at intervals. The suspended base is composed of at least one platform-shaped base body. The suspended base is provided with an aeration area, and the rotating disc is immersed in the river channel from the aeration area. Inside, the aeration area spans the width of the river channel, and the suspended base forms a dam-like interception in the river channel.

Preferably, the immersion level and water depth of the rotating disc is 300-700mm.

Preferably, the floating base is formed by splicing several buoys.

Preferably, the buoy is a hollow cylinder, and a water injection hole is provided on the cylinder.

As a preference, the driving device is a forward and reversible reducer and a motor.

Preferably, a metal frame is added between the suspended base and the rotary disc aerator.

Preferably, the push flow velocity of the rotary disc aerator is ≥0.3m/s.

For realizing the purpose of the present invention, a kind of small-scale river control method is provided, and it is characterized in that comprising the following steps:

1) Choose a small river channel with a diameter of 3 meters to 50 meters;

2) A suspended rotary disc aerator is placed in the small diameter section of the small channel, the oxygenation rate is > 2 kg O ² /h, the push flow velocity is > 0.3 m/s, and the mixed liquid suspended solid concentration (MLSS) in the aeration area 2000~6000mg/L;

The length of the suspension treatment device is slightly smaller than the width of the river, forming a dam-type structure, and it is turned on at a fixed time every day. beneficial effect

The core inventive point of the present invention is as follows:

1. The use of a suspended platform improves the adaptability to the water level of the river, preventing rain or dry weather, and the influence of the rise or fall of the water level in the river on the draft depth of the rotating dish, thereby improving the stability of the equipment operation.

2. Aeration is carried out in the form of aeration rotary discs, and the water body is exposed to the surface through rotary discs, and the draft depth is strictly controlled to be greater than 300 mm, so as to form effective oxygenation, push flow and mixing, especially its push flow And the effect of mixing has a huge advantage over other aeration equipment.

3. The method of dam-type interception of the entire river water body is adopted, and the overall aeration push flow method is formed in the width direction of the river channel. A group of 6-8 meters is set up in the river channel, so that the water body of the river channel forms a flow as a whole. When the water body pushes the flow velocity When it is greater than 0.3m/s, the entire river channel forms a shape similar to an oxidation ditch, forming aerobic, facultative, and anaerobic reaction sections to promote the growth of bacterial colonies in the river channel.

4. Modular assembled structure, using several buoys to be spliced with each other, multiple devices can be used for horizontal splicing of river channels of different widths, and multiple groups can be set at intervals along the length of the river channel, which truly achieves the purpose of river management and investment. Small, quick-acting, especially suitable for small rivers.

Description of drawings

FIG. 1 is a front view of Embodiment 1. FIG.

FIG. 2 is a top view of FIG. 1 .

FIG. 3 is a front view of Embodiment 2. FIG.

FIG. 4 is a top view of FIG. 3 .

5 is a front view of Embodiment 3.

FIG. 6 is a top view of FIG. 5 .

FIG. 7 is a structural diagram of Embodiment 4. FIG.

Embodiments of the present invention

Embodiment 1: As shown in Figures 1 and 2, a small-scale floating rotary disc aerator for river channels includes a suspended base 1, and the rotary disc aerator 2 is installed on the suspended base 1, and generally a suspended The length of the base 1 is 6-8 meters. The rotating disc aerator 2 includes a rotating shaft 2.1, a driving device 2.2 and a rotating disc 2.3 that is sleeved on the rotating shaft 2.1 at intervals. The floating base 1 is composed of a platform-shaped base. The floating base 1 is provided with an aeration zone 1.1, the rotating disc 2.3 is immersed into the river channel from the aeration zone, the aeration zone 1.1 spans the width of the river channel, and the floating base 1 is in the form of a dam in the river channel. Intercepting shape, the immersion level of the rotary disc 2.3 is 300-700 mm, and the suspension base 1 is spliced by several buoys 1.2. The buoy 1.2 is a hollow cylinder with a water injection hole on the cylinder. The hole is filled with water to adjust the counterweight to adjust the draft of the disc butterfly 2.3, and the drive device 2.2 is a forward and reversible reducer and motor. A metal frame 3 is added between the suspension base 1 and the rotary disc aerator 2. The reducer 2.2.1, the motor 2.2.2 and the bearing seat 2.2.3 are installed and fixed on the metal frame 3, which can effectively prevent displacement and increase the The counterweight can also be adjusted by the size and thickness of the rotating shaft 2.1. The main purpose is to adjust the draft of the rotating disc 2.3, so as to carry out effective surface aeration.

It is better to set the diameter of the rotating disc 2.3 to more than 1.8 meters. The reason is that it can ensure the draft depth while leaving space for the installation height of the reducer and motor. its useful life.

Example 2: As shown in Figures 3 and 4, when the width of the river channel is more than 10 meters, two suspended rotary disc aerators are connected in series, and each is independently connected to a set of reducers and motors.

Example 3: As shown in Figures 5 and 6, when the width of the river channel is more than 10 meters, two suspended rotary disc aerators are connected in series and use a set of reducers and motors.

Embodiment 4: As shown in Figure 7, at least two sets of guide rings 4 are symmetrically arranged on the two short sides in the width direction of the suspended base 1 of the suspended rotary butterfly aerator, and the two banks of the river channel are symmetrical along the direction of the river channel 10 governance extension. A traction frame 5 is provided, the traction frame 5 is provided with a traction rope 6, the traction rope 6 is a steel wire rope, a pulley assembly 7 is hooked on the steel wire rope, and the bottom end of the pulley assembly 7 is provided with a connecting piece 8, and the connecting piece 8 is hooked on the suspension type rotor. The suspension base 1 of the butterfly aerator is placed on the guide rings 4 which are symmetrical on the two short sides in the width direction. The floating rotary butterfly aerator carries out displacement aeration along the traction rope 6, and the two ends of the traction frame 5 are provided with limit sleeves 9. When the guide ring 4 contacts the limit sleeve 9, the limit switch on the guide ring 4 is activated to control the The motor is reversed, so as to realize the reciprocating and circulating aeration of the suspended rotary butterfly aerator in the river treatment area.

Embodiment 5: a small-scale river treatment method, comprising the following steps:

1. Select a small river channel with a diameter of 3 meters to 50 meters;

2. Place a suspended rotary disc aerator in the small diameter section of the small channel, the oxygenation rate is >2 kg O ² /h, the push flow velocity is >0.3m/s, and the mixed liquid suspended solid concentration (MLSS) in the aeration area 2000~6000mg/L;

3. The length of the suspension treatment device is slightly smaller than the width of the river channel, forming a dam-type structure, and the aeration is started at a fixed time every day.

Several groups of the suspended rotary disc aerators are arranged at intervals along the length direction of the river.

Claims

A small suspended rotary disc aerator for river channels, comprising a suspended base, characterized in that the rotary disc aerator is installed on the suspended base, and the rotary disc aerator comprises a rotating shaft, a driving device and a spacer sleeved on the rotating shaft The floating base is composed of at least one platform-shaped base. The floating base is provided with an aeration area. The rotating disc is immersed into the river channel from the aeration area, and the aeration area spans the width of the river channel. On the upper side, the suspended base is like a dam-like interception in the river channel.
The suspended rotary disc aerator for small river channels according to claim 1, characterized in that the immersion level and water depth of the rotary disc discs are 300-700 mm.
The suspended rotary disc aerator for small river channels according to claim 1, characterized in that the suspended base is formed by splicing a plurality of buoys.
The suspended rotary disc aerator for small river channels according to claim 1 is characterized in that the buoy is a hollow cylinder, and a water injection hole is arranged on the cylinder.
A small suspended rotary disc aerator for river channels according to claim 1, characterized in that the driving device is a reducer and a motor that can be reversible.
A suspended rotary disc aerator for small river channels according to claim 1, characterized in that a metal frame is added between the suspended base and the rotary butterfly aerator.
The suspended rotary disc aerator for small river channels according to claim 1 is characterized in that the thrust flow velocity of the rotary disc aerator is ≥0.3m/s.
A small-scale river control method as described in one of claims 1-7, is characterized in that comprising the following steps:

Choose a small river channel with a diameter of 3 meters to 50 meters;

A suspended rotary disc aerator is placed in the small diameter section of the small channel, the oxygenation rate is > 2 kg O 2 /h, the push flow velocity is > 0.3 m/s, and the mixed liquid suspended solid concentration (MLSS) in the aeration area is 2000 ~6000mg/L;

The length of the suspension treatment device is slightly smaller than the width of the river channel, forming a dam-type structure, and the aeration is started at a fixed time every day.