High efficiency shallow air flotation machine, full name of super efficiency shallow air flotation Water filter, is a common water treatment device at present, which is mainly used to remove suspended solids in water, as well as some COD in water. Adopting the principle of dissolved air flotation, a portion of dissolved water is introduced into the treated water, and small bubbles released from the dissolved water are used to float suspended solids or oil out of the water surface, thereby achieving solid-liquid separation.
Technological Process of shallow air flotation machine
The raw water to be treated is lifted and pumped to the central inlet pipe. At the same time, the dissolved water and liquid medicine are mixed in the central inlet pipe, and then evenly distributed into the air flotation tank through a water distribution pipe. The movement speed of the water distribution pipe is the same as the outlet flow rate, but the direction is opposite, As a result The zero speed minimizes the disturbance of the incoming water, and the suspension and settlement of the flocs are carried out in a static state. The skimming device and the main machine walking mechanism move synchronously while rotating, collecting the scum and discharging it out of the pool through the central mud pipe. The clean water in the pool is discharged from the center through the clean water collection pipe, which also moves synchronously with the main machine walking mechanism. The clean water pipe and the water distribution pipe are separated by the water distribution mechanism and do not interfere with each other The sediment is scraped into the mud bucket by a scraper and regularly discharged, thereby achieving the purpose of removing suspended solids.
Process Description of shallow air flotation machine
1. The papermaking wastewater treated by the secondary sedimentation tank flows automatically to the collection tank, ensuring a balance between water quality and quantity;
2. Then lift it from the sewage lift pump to the shallow air flotation tank;
3. Add PAC before lifting the water pump, add PAM at the shallow air flotation inlet, mix thoroughly through the mixing pipe at the bottom of the air flotation tank, and then mix with some positively charged small bubbles generated by the gas dissolution system to adsorb the small bubbles with pollutants in the floc and wastewater, and bridge them into the air flotation water distribution system;
4. By using the water distribution system, the wastewater enters the air flotation tank, and by using the water distribution system and variable frequency speed control device, the wastewater entering the air flotation tank reaches zero speed in the water distribution area and air flotation area;
5. The coagulated flocs and pollutants adsorbed and bridged by microbubbles undergo rapid solid-liquid separation under the action of buoyancy and zero velocity;
6. The floating slurry pollutants that are separated and floating in the clear water area of the shallow air flotation tank are scooped up by a spiral skimming spoon, and then flow to the sludge bucket. Under the action of gravity, they flow to the scum tank and are then pumped to the plate and frame filter press. After dehydration, they are incinerated and utilized.
7. The clean water that is separated in the lower layer flows to the discharge channel through the clean water extraction tank pipe below the rotary drum and meets the discharge standards.
Post time: Jun-12-2023