Application of Air Floating Machine in Papermaking Sewage Treatment

Air flotation machine relies on the principle of air flotation to complete the treatment of sewage, including solid-liquid separation, oil separation and so on. The treatment process includes five steps: adding coagulant liquid, releasing dissolved gas, forming pressure difference, appearance of micro-bubbles and sewage separation. Compared with other mechanical methods, it has the advantages of simple structure, high negative pressure, high processing efficiency and low fault frequency.

Air flotation machine is mostly used in sewage discharging area, food processing industry, petrochemical industry, paper mill, transportation industry, waterworks and so on. It has advantages in sewage treatment. Of course, there are still some requirements for sewage treatment, such as solid-liquid separation, oil treatment, viscous substances, gelatinous substances.

The application of air flotation machine in wastewater treatment of papermaking is mainly embodied in three aspects:

1. Coagulant liquid is added to sewage to initially realize solid-liquid coagulation. After that, negative pressure difference between air and water is formed in water through dissolved air release equipment. Under the action of air floatation pump, liquid debris will float on the surface of water with bubbles, which basically completes solid-liquid separation.

2. Paper-making wastewater has more viscous and colloidal substances, so it is necessary to choose the vortex-concave air flotation machine, which can improve the removal rate of wastewater by using the vortex-concave layer. It has the characteristics of stable performance and energy saving.

The application of air flotation machine in papermaking wastewater treatment is mainly realized by the vortex-concave air flotation machine. Of course, due to the complex processing technology of the vortex-concave air flotation machine, the necessary maintenance measures should be paid attention to in the process of using, such as air flotation pump, scraper, filter, etc., which need to be tested regularly to avoid damage and over-freezing.