Filtration is an important part of the water treatment process. In the filter tank of the water supply project, when the filter water is running, the porosity of the filter material is continuously reduced with the increase of the interception amount of the filter layer during the working period, the sludge permeability is deepened, and the resistance to the water flow is increased. As a result, the filtration rate is lowered, the water level of the filter is gradually increased, and the turbidity of the filtered water is increased. In order to restore the normal operation of the filter in a short time and ensure the quality of the effluent water and water, it is necessary to carry out backwashing and impact the filter layer on the filter plate.
Practice has proved that the gas-water backwashing method is better than the water backwashing method. The gas-water backwashing can destroy the structure of the mud ball in the filter material. When the air is flushed, the filter material generates a large vibration, and the filter material repeatedly collides with the friction. The filter layer is stirred vigorously, the mud ball cannot be formed, and the formed mud ball structure is also destroyed by vibration, and the adherends on all the filter materials fall off and are carried away by the backwash water.
Gas-water backwash filter performance
The filter head is divided into two types: A type and B type: type A is a long handle filter head, which is applied to the filter backwash water distribution system; type B is a short handle filter head, which is applied to the filter single water backwashing and gravity type, Water filtration system such as pressure canister and ion exchange filter bed. The filter head is made of imported ABS engineering plastics with high strength and is not easy to be broken. In the filter head structure, the threaded rubber gasket is added to strengthen the joint and never fall off. The base of the filter cap is designed to increase the bottom seam so that there is no dead water area between the filter plate and no mud. The filter head is a steam-water recoil device of the water distribution system at the bottom of the filter tank. It can effectively flush out the sludge and impurities in the filter tank to ensure the normal operation of the water quality and quantity of the filter tank. The types of filter heads are (long and short handle). Type, plum type, tower type and cylindrical type are all made of ABS engineering plastics. The structure is reasonable, the connection is firm, the bearing strength is high, the gap is not changed, so there is no dead water corner zone between the filter plates, no mud accumulation, good effect. . The long-shank filter head is often used in the soda water backwashing water distribution system of the filter; the short-shank filter head is used in the filtration device of water treatment equipment such as single-water backwashing and gravity type, pressure type canister and ion exchange filter bed. The filter head filter cap is used for urban drinking water and advanced purification of industrial water. The filter head filter cap is high-purity water, advanced purification material in mineral water production, and the filter head filter cap effectively removes COD, pigment and odor poisonous substances in water.
The backwash filter cap includes two kinds of drain caps and water filter caps, which are long, medium, short, and super long, plum type, mushroom type, and tower type. They are made of ABS engineering plastics and stainless steel. The structure is reasonable, the connection is firm, the bearing strength is high, the gap is unchanged, and the effect is good, that is, the yin and yang resin can be prevented from flowing out, and the flow can be ensured. Suitable for water treatment of filter water soda backwashing system and softening water combination, gravity pressure, pressure type, return program and ion exchanger
The filter cap is a professional product for the production of water supply and drainage equipment. The filter cap products mainly include water purification material series, pipeline vibration isolation equipment mainly composed of rubber joints, metal compensator series mainly based on stainless steel compensator, non-metallic compensator series mainly based on fabric compensator and sleeves. Pipe expansion equipment based on pipe expansion.