The horizontal flow dissolved air floatation machine is a kind of solid-liquid separation equipment commonly used in the sewage treatment industry. It can remove suspended substances, grease, and gum substances in the waste, and is the main equipment for sewage preliminary treatment. This article introduces the characteristics and process of the horizontal flow dissolved air flotation machine.

Working principle of horizontal flow dissolved air flotation machine

The dissolved air tank generates dissolved air water, which is released to the water to be treated by depressurization through the releaser. The air dissolved in the water is released from the water to form 20-40um micro bubbles. The micro bubbles combine with the suspended solids in the sewage to make the specific gravity of the suspended solids smaller than the water, and gradually float to the water surface to form scum. There is a scraper system on the water surface to scrape the scum into the sludge tank. The clear water enters the clean water reservoir from the lower part through the overflow chute.

Characteristics of horizontal flow dissolved air flotation machine

1. The dissolved air tank produces small bubbles with a particle size of 20-40um, and the flocs are firmly adhered, which can achieve good flotation effect.

2. The use of flocculant is less and the cost is reduced.

3. The operation procedures are easy to master, the water quality and quantity are easy to control, and the management is simple.

4. A backwash system is provided, so that the releaser is not easy to block.

Advantages of horizontal flow dissolved air flotation machine

1. The research shows that only bubbles smaller than the diameter of floating particles can effectively adsorb the suspended particles. In natural water bodies, suspended particles that are difficult to precipitate in a short time are mostly IO-30UM in diameter. Solid suspended particles above 50UM can naturally sink or surface after several hours of standing. The diameter of emulsion particles is between 0.25-2.5UM, and a small number of large particles are about IOUM in diameter. Therefore, About 1UM microbubbles can adsorb most particles well.

2. The utilization rate of dissolved air is nearly 100%. The traditional vortex air flotation is only about 10%, while the early air flotation is only about 6%. The efficiency of air flotation has little to do with the efficiency of dissolved air, and ultimately depends on the utilization rate of dissolved air. Take the dissolved gas pressure as an example. If the dissolved gas pressure is increased from 0.3Mpa to 0.5Mpa, the dissolved gas efficiency can only be doubled at most, but the energy consumption is several times higher. Take the dissolved gas effect as an example. If the dissolved gas efficiency is increased from 50% to 100%, the flotation efficiency can only be doubled at most. However, the structure of the corresponding dissolved gas equipment is much more complex, and the maintenance is also correspondingly complex.

Application of Horizontal Flow Dissolved Air Floater

1. The unit flotation capacity of advection air flotation is high, and the utilization rate of dissolved air is high, so it can be used to treat wastewater with very high suspended solids, and its maximum value can reach 20000mg/L. Like white water of papermaking with suspended solids content up to thousands of mg/L, this equipment can easily achieve the purpose of reuse.

2. Floats of 1UM-10UM, such as algae, can be separated.

3. It can separate metal hydroxides with large specific gravity, such as iron, copper, chromium, zinc, etc. For example, it can separate copper containing wastewater of 100 to 1000 mg/L, and only one air flotation can reach below 10 mg/L.

4. This equipment is used in paper making, food, printing and dyeing, life, steel, thermal power plant and other fields, and its treatment effect is superior to that of the special equipment in this industry. For example, it is used in the starch industry to recover protein, which can make the protein content recovered reach 60%, reaching the effect of first-class products. At present, the special treatment equipment in the starch industry can only reach 30%. It is used to separate naphthalene flakes from coking cooling water, separate various tars from coking mixed water, use solvent extraction to remove phenol and recover solvent oil, and use it to remove oil, COD, SS, etc. from railway and machinery processing wastewater. Even without flocculant, it can achieve ideal results.

Horizontal flow dissolved air floatation machine can be used to remove suspended solids, oil and various colloidal substances in sewage, such as sewage treatment of petrochemical, coal mine, paper making, printing and dyeing, slaughter, brewing and other industrial enterprises; It is used to recover useful substances, such as the collection of fine fibers in white water of papermaking.

Note: You can write to us or leave a message at any time to get technical support or solutions.

Email: info@tnwcn.com

Feedback: Click here