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I、Working principle
The working principle of the dissolved air flotation machine is based on air flotation technology, which dissolves air in water under specific conditions to form dissolved air water. Dissolved gas water, as the working medium, rapidly depressurizes and releases a large amount in the release device, producing fine bubbles. These bubbles adsorb with suspended particles, colloidal substances and other impurities in the sewage, forming an air flotation body with a specific gravity lower than water. Under the action of buoyancy, it quickly rises to the surface of the water, forming a floating slag layer. The treated clean water is discharged from the bottom of the air flotation tank, achieving solid-liquid separation.
1. Gas dissolution process: Under a certain pressure (usually 0.35-0.45Mpa), an appropriate amount of air is sucked in through a jet injector, and saturated gas carrier is formed in the gas dissolution tank with the reflux water.
2. Release bubbles: The saturated gas carrier is suddenly depressurized and released through a release device, obtaining a large number of fine bubbles with diameters typically between 20-100 microns.
3. Adhesive impurities: Bubbles quickly adhere to particles, emulsified oil, fibers, and other impurities in water, as well as flocs formed through coagulation reactions.
4. Achieve buoyancy: Due to the fact that the floc with a large number of attached micro bubbles has a lower overall density than water, it will be forced to quickly float on the surface of the water.
5. Separation treatment: After floating on the water surface, the floating slag is scraped away and enters the sludge area; The separated water enters the clean water tank through a bottom perforated pipe, and some of the water flows back as dissolved gas water, while the other part of the clean water is discharged through a valve.
II、Structural composition
The dissolved air flotation machine consists of the following key systems:
1. Dissolved air system: including dissolved air tank, air compressor, and water pump, responsible for air dissolution and pressure control.
2. Release system: The release device generates micro bubbles through a sudden drop in pressure, directly affecting the air flotation efficiency.
3. Air flotation tank: The core area for mixing and separating bubbles and pollutants, usually designed in a horizontal or vertical flow manner.
4. Scraping system: composed of scraper, chain and other components, used to remove floating debris on the water surface.
5. Pharmaceutical dosing system: Add coagulants or flocculants to specific water quality to enhance the aggregation effect of pollutants.
III、Application Fields
Municipal and industrial wastewater treatment:
1. During the pretreatment stage, suspended solids and oils are removed to reduce the burden of subsequent biochemical treatments.
2. Improve the effluent quality during the deep treatment stage to meet reuse or discharge standards.
3. Food industry wastewater: efficient removal of organic matter, protein, and animal and vegetable oils.
4. Printing and dyeing wastewater: Treat high chromaticity and high organic wastewater, and recycle resources such as fibers.
5. Oily wastewater: suitable for oil-water separation in industries such as petroleum and mechanical processing.
6. Algae enrichment in water: Rapid removal of algae is achieved through bubble adsorption.
IV、Technical advantages and limitations
Advantages:
1. High hydraulic load and better treatment efficiency than traditional sedimentation methods.
2. Strong adaptability, capable of handling complex water quality with low turbidity, high chromaticity, and colloidal substances.
3. The equipment is compact and occupies a small area.
4.High degree of automation, easy operation, and simple management
Limitations:
1. The energy consumption is high, and the continuous operation of the air compressor and solvent pump increases the electricity consumption.
2. The noise pollution is obvious, and sound insulation measures need to be taken.
3. The process complexity is high, requiring precise control of dissolved gas pressure and dosage of chemicals.
V、Development Trends
With the improvement of environmental standards, the dissolved air flotation machine is being optimized in the following directions:
1. Integrate intelligent control system to achieve automatic adjustment of pressure and medication dosage.
2. Develop low-energy gas dissolution devices to reduce operating costs.
3. Material innovation improves equipment corrosion resistance and extends service life
I、Working principle
The working principle of the dissolved air flotation machine is based on air flotation technology, which dissolves air in water under specific conditions to form dissolved air water. Dissolved gas water, as the working medium, rapidly depressurizes and releases a large amount in the release device, producing fine bubbles. These bubbles adsorb with suspended particles, colloidal substances and other impurities in the sewage, forming an air flotation body with a specific gravity lower than water. Under the action of buoyancy, it quickly rises to the surface of the water, forming a floating slag layer. The treated clean water is discharged from the bottom of the air flotation tank, achieving solid-liquid separation.
1. Gas dissolution process: Under a certain pressure (usually 0.35-0.45Mpa), an appropriate amount of air is sucked in through a jet injector, and saturated gas carrier is formed in the gas dissolution tank with the reflux water.
2. Release bubbles: The saturated gas carrier is suddenly depressurized and released through a release device, obtaining a large number of fine bubbles with diameters typically between 20-100 microns.
3. Adhesive impurities: Bubbles quickly adhere to particles, emulsified oil, fibers, and other impurities in water, as well as flocs formed through coagulation reactions.
4. Achieve buoyancy: Due to the fact that the floc with a large number of attached micro bubbles has a lower overall density than water, it will be forced to quickly float on the surface of the water.
5. Separation treatment: After floating on the water surface, the floating slag is scraped away and enters the sludge area; The separated water enters the clean water tank through a bottom perforated pipe, and some of the water flows back as dissolved gas water, while the other part of the clean water is discharged through a valve.
II、Structural composition
The dissolved air flotation machine consists of the following key systems:
1. Dissolved air system: including dissolved air tank, air compressor, and water pump, responsible for air dissolution and pressure control.
2. Release system: The release device generates micro bubbles through a sudden drop in pressure, directly affecting the air flotation efficiency.
3. Air flotation tank: The core area for mixing and separating bubbles and pollutants, usually designed in a horizontal or vertical flow manner.
4. Scraping system: composed of scraper, chain and other components, used to remove floating debris on the water surface.
5. Pharmaceutical dosing system: Add coagulants or flocculants to specific water quality to enhance the aggregation effect of pollutants.
III、Application Fields
Municipal and industrial wastewater treatment:
1. During the pretreatment stage, suspended solids and oils are removed to reduce the burden of subsequent biochemical treatments.
2. Improve the effluent quality during the deep treatment stage to meet reuse or discharge standards.
3. Food industry wastewater: efficient removal of organic matter, protein, and animal and vegetable oils.
4. Printing and dyeing wastewater: Treat high chromaticity and high organic wastewater, and recycle resources such as fibers.
5. Oily wastewater: suitable for oil-water separation in industries such as petroleum and mechanical processing.
6. Algae enrichment in water: Rapid removal of algae is achieved through bubble adsorption.
IV、Technical advantages and limitations
Advantages:
1. High hydraulic load and better treatment efficiency than traditional sedimentation methods.
2. Strong adaptability, capable of handling complex water quality with low turbidity, high chromaticity, and colloidal substances.
3. The equipment is compact and occupies a small area.
4.High degree of automation, easy operation, and simple management
Limitations:
1. The energy consumption is high, and the continuous operation of the air compressor and solvent pump increases the electricity consumption.
2. The noise pollution is obvious, and sound insulation measures need to be taken.
3. The process complexity is high, requiring precise control of dissolved gas pressure and dosage of chemicals.
V、Development Trends
With the improvement of environmental standards, the dissolved air flotation machine is being optimized in the following directions:
1. Integrate intelligent control system to achieve automatic adjustment of pressure and medication dosage.
2. Develop low-energy gas dissolution devices to reduce operating costs.
3. Material innovation improves equipment corrosion resistance and extends service life
Tel: （+00 86）0536-6085153
Fax: （+00 86）0536-6073577
E-mail:sales@better-ept.com