1、 Purpose and Characteristics

Application areas of super efficient shallow air flotation: used in industrial wastewater solid-liquid separation treatment projects, such as petrochemical, textile, printing and dyeing, electroplating, leather making, food, alcohol, brewing and other industries; Used for the recovery of useful substances in wastewater, such as papermaking and pulp water

Industries such as fiber recycling.
Characteristics of super efficient shallow air flotation:

1. Using the zero element principle: water enters from the center of the pool, the water distribution pipe rotates clockwise, and water sprays out in the opposite direction from inside the pipe; In this way, the relative velocity of water to the pool wall is close to zero, without stirring the water in the pool. Using particles in water to float or settle statically, purification process

High degree, with a suspended solids removal rate of over 90%; In addition, with the rotation of the water replenishment device, the bubbles that have been thoroughly mixed with the sewage in advance can evenly fill the entire air flotation tank. The adhesion between fine bubbles and flocs occurs throughout the entire air flotation separation process, without any "air bubbles"

Floating Dead Zone ".

2. Using shallow pool theory - the water depth is generally 650mm; the floating path is short, the resistance is low, and the speed is fast. The application of this theory significantly reduces equipment manufacturing costs and shortens equipment footprint.
3. Utilizing a new gas dissolution theory - using high-pressure gas dissolution tubes; The unit air solubility rate reaches 90%, and the air flotation effect is good.
4. Advanced skimming bucket - spiral skimming bucket has low agitation and good effect.
5. Advanced water outlet pipe - rotating water outlet pipe; Clear water can be discharged at any time.
6. The setting of the scraper plate - enables favorable conditions for the timely removal of sinking sludge.

2、 Working principle and process flow of super efficient shallow air flotation

The raw water enters the central pipe of the air flotation device together with the dissolved air water through the feed pump (or self flow), and is evenly distributed into the bottom of the air flotation tank through a rotatable hydraulic joint and rotatable distribution. The dissolved air water filled with microbubbles and the raw water are filled at the bottom of the air flotation device

Separate collision and adhesion, causing particles in the raw water to form floating slag with a specific gravity less than 1, which rises to the water surface and is removed. The distribution pipes for raw water and dissolved water are fixed on the same rotating device, and their rotation direction is the same as the water flow direction of the raw water entering the bottom of the air flotation tank

Opposite, but with equal speed. The key part of this device is the successful use of the "zero velocity" principle, which ensures that the incoming water does not disturb the raw water and solid-liquid separation is carried out in a static state. The surface formed floating slag is collected by a spiral skimming device and then passed through

The slag discharge pipe discharges it outside the pool, and the clarified water is collected by the rotating collection pipe and discharged outside the pool. The collection pipe is connected to the central rotating part, so the residence time of the raw water in the air flotation tank is the rotation cycle of the central rotating part. Connected to rotating walking

The scraper on the device and the sediment on the pool wall are scraped into the mud hopper and discharged regularly.

3、 Structure of super efficient shallow air flotation

The super efficient shallow air flotation machine integrates coagulation, air flotation, slag skimming, sedimentation, and mud scraping. The overall shape is cylindrical. The main body of the device consists of a circular shallow pool stationary part, a central rotating part, and a dissolved gas water preparation system. The central rotating part includes: water inlet

The water distributor, pressurized water inlet, pressurized water distributor, water outlet, and spiral sludge hopper are all installed on the rotating bracket; An adjustable reducer is installed on the outer edge of the bracket, which is driven by the driving wheel to make the bracket rotate around the center without touching the outer edge of the pool body
The circular orbit rotates at a speed consistent with the inflow velocity. The rotation of the walking part and the mud bucket is driven by a speed regulating motor and powered by a central slip ring.

4、 Comparison between super efficient shallow air flotation and traditional air flotation

1. In traditional air flotation devices, the pool depth is generally 2.0-2.5m, while the effective water depth of shallow air flotation devices is generally 400-650mm.
2. In traditional air flotation devices, the residence time of water is generally 10-20 minutes; In shallow air flotation devices, the residence time is only 2-3 minutes.
3. In traditional air flotation devices, the dissolved gas system is equipped with a dissolved gas tank. If calculated based on the actual volume of the dissolved gas tank, its hydraulic retention time is 2-4 minutes; In shallow air flotation devices, the dissolved gas system uses a dissolved gas tube, eliminating the need to check the filling material and allowing the dissolved gas tube to be used

The volume utilization rate reaches 100%, and its hydraulic retention time is actually only 10-15 seconds.
4. In traditional air flotation devices, the scraper regularly removes the floating slag layer, which cannot be selectively cleaned according to the floating time of the floating slag. Therefore, it not only causes significant disturbance to the water body, but also has a high moisture content in the floating slag; In shallow air flotation device

In the middle, the spiral skimmer is installed at the front of the water distribution system, and the coarse floating slag is always the floating slag with the longest floating time (2-3 minutes) in the air flotation tank, that is, the floating slag with the most thorough solid-liquid separation and the lowest moisture content. Based on the above analysis and comparison, shallow air flotation equipment

There are essential differences between traditional air flotation devices, and their superior technical performance has gradually gained attention from domestic users and environmental professionals. If the introduction of this technology can be accelerated and localized, it will undoubtedly bring huge economic and social benefits.