In the field of industrial wastewater and municipal sewage treatment, a device called “flotation machine” is becoming the core equipment for water purification with its unique “bubble magic”. It achieves efficient solid-liquid separation through the clever combination of microbubbles and suspended matter, bringing revolutionary breakthroughs to the water treatment industry.
How Bubbles “Carry” Pollutants
The core of the flotation machine lies in the dissolved air-release system. The equipment first uses a dissolved air pump to pressurize the air and dissolve it in the water, forming “super-saturated dissolved air water” rich in tiny bubbles. When the dissolved air water is mixed with sewage, the pressure drops suddenly, causing bubbles to precipitate, like countless miniature lifebuoys, quickly attaching to the surface of the suspended matter, reducing its density and floating to the water surface, forming a scum layer that can be scraped off.
Five steps to complete water quality transformation
- Pretreatment line of defense
The sewage first passes through pre-treatment equipment such as screens and sedimentation tanks to remove large particles of impurities and ensure the stable operation of the flotation machine.
- Dissolved air water preparation
The air dissolving pump forces air to dissolve in water at a pressure of 0.3-0.5MPa, forming air-dissolving water with an air content of 3-5%, just like “locking” the air into the water.
- Flotation reaction tank
The dissolved air water and sewage are mixed violently in the reaction zone, and the bubbles collide and adsorb with the suspended matter to form floc particles with a diameter of 0.5-1mm. Flocculation can be completed within 10-20 minutes.
- Scraping system
The scum on the water surface is continuously collected by a chain scraper, with a moisture content of up to 95%. Compared with the traditional sedimentation process, the sludge volume is reduced by more than 60%.
- Clean water reuse
The water quality after treatment can reach Level B standard of “Pollutant Discharge Standard for Urban Wastewater Treatment Plants”, and some processes can be reused in the production stage through deep treatment.
three ways to solve water treatment problems
Efficiency revolution: The separation speed of air flotation is 20 times that of gravity sedimentation, and the floor space occupied is only 1/5 of that of traditional processes.
Energy consumption optimization: The frequency conversion dissolved air system is adopted, and the energy consumption per ton of water is as low as 0.15kW・h, which saves 40% energy compared with the traditional process
Intelligent operation and maintenance: integrated online monitoring and automatic mud discharge system to achieve 24-hour unattended operation
Dual guard for industry and municipal administration
In industrial fields such as papermaking, printing and dyeing, and food processing, flotation machines can efficiently remove COD, color, and other indicators. A case study of a printing and dyeing company showed that after using a flotation machine, the color of wastewater dropped from 800 times to less than 50 times. In municipal sewage treatment, the combination of flotation machines and biological treatment can improve the efficiency of nitrogen and phosphorus removal, and help improve the standards of urban sewage treatment plants.
Green technology drives sustainable development
As the “dual carbon” goal is promoted, the technology of flotation machines is constantly upgraded. The new vortex flotation machine reduces energy consumption through jet aeration, while the dissolved air flotation machine is developing in the direction of modularization and intelligence. According to the industry white paper, by 2025, the market size of flotation equipment will exceed 8 billion yuan, playing an increasingly important role in the comprehensive management of water environment.
This seemingly ordinary machine is weaving a technological defense line to protect green waters and green mountains with an invisible bubble network. In the silent battlefield of water treatment, the flotation machine interprets with innovation: environmental protection and efficiency have never been a single choice.
