The quartz sand filter has simple structure, convenient operation and maintenance, automatic control of operation, high filtration efficiency, small resistance, large processing flow, and less backwashing times. Quartz sand filter is widely used in the pretreatment of pure water, food and beverage water, mineral water and electronics, printing and dyeing, papermaking, chemical industry, and the filtration of industrial sewage after secondary treatment. It is also used in the depth filtration of reclaimed water reuse system and swimming pool circulating water treatment system.
It also has a good removal effect on suspended solids in industrial wastewater. Quartz sand filter is a steel pressure filter, which can remove suspended solids, mechanical impurities, residual chlorine and chroma in raw water. According to different filter materials, mechanical filters are divided into single-layer, double-layer and three-layer filter materials. and fine sand filter; the filter material of quartz sand filter is generally a single layer of quartz sand, the particle size is 0.8-1.2mm, and the height of the filter layer is usually 1.0-1.2m. According to the structure, it is divided into single-flow, double-flow, vertical and horizontal; according to the anti-corrosion requirements of the inner surface, it can be divided into rubber-lined type and non-rubber-lined type.
Installation and operation of quartz sand filter: 1. When filling quartz sand, the tightness of the filter cap must be carefully checked to ensure that each filter cap is fastened correctly before filling quartz sand. 2. When constructing on the concrete foundation of the pressure filter, holes should be reserved according to the position of the filter foot holes, and the lifting of the filter and the assembly of the connecting pipe should be carried out after the foundation reaches the design strength. 3. In the initial stage of filter operation, the operation experience should be gradually explored according to the local water quality to determine the type and dosage of coagulant, the opening degree of the drainage gate valve during backwashing, etc.
4. During the operation of the filter, the turbidity of the influent water shall not be higher than the index specified in the design, and backwashing shall be carried out according to the design requirements, otherwise, the operating cycle may be shortened or mud balls may be formed in the filter layer, which may seriously affect the effluent water quality. 5. When directly filtering, the coagulant should be prepared to a certain concentration and added before the pump. 6. Flushing steps: Flushing: Close the water inlet pump and water inlet gate valve, open the drain gate valve, and carry out backwashing according to the flushing intensity and flushing time required by the design.
Resume operation: close the drain gate valve, open the water inlet valve and air release valve, start the water inlet pump, wait for all the air in the filter to be exhausted, then close the exhaust valve, and the filter will resume normal operation. 7. When several pressure filters are operated in parallel, gate valves should be installed on the inlet and outlet pipes. Poolking is the best swimming pool equipment manufacturer and supplier in China. Poolking exists to provide the highest quality swimming pool equipment while offering competitive pricing..