The stainless steel filter consists of a housing, multiple filter elements, backwash mechanism, and differential pressure controller. The inner cavity of the stainless steel filter is divided into upper and lower chambers by a transverse partition inside the housing. The upper chamber is equipped with multiple filter elements, which fully utilizes the filtering space and significantly reduces the volume of the filter. The lower chamber is equipped with a backwash suction cup. During operation, the turbid liquid enters the lower chamber of the filter through the inlet and then enters the inner cavity of the filter element through the partition hole. Impurities larger than the gap of the filter element are intercepted, and the clean liquid passes through the gap to reach the upper chamber, and finally is sent out from the outlet.
The filter element adopts a high-strength wedge-shaped filter screen, which automatically cleans the filter element through pressure difference control and timing control. When impurities accumulate on the surface of the filter element, causing the pressure difference between the inlet and outlet to increase to the set value, or when the timer reaches the preset time, the electric control box sends a signal to drive the backwash mechanism. When the backwash suction cup port is aligned with the inlet of the filter element, the drain valve opens, and the system releases pressure and drains water. A negative pressure zone with a relative pressure lower than the water pressure outside the filter element appears on the inside of the suction cup and filter element, forcing some of the clean circulating water to flow from the outside of the filter element into the inside of the filter element. Impurities and particles adsorbed on the inner wall of the filter element flow into the tray with the water and are discharged from the drain valve. The specially designed filter creates a jet effect inside the filter element, and any impurities will be washed away from the smooth inner wall. When the pressure difference between the inlet and outlet of the filter returns to normal or the timer setting time ends, the material does not stop flowing throughout the entire process, and the backwashing water consumption is low, achieving continuous and automated production. However, due to the low production concentration in the industry, low research and development capabilities for high-end products, and low manufacturing technology level in the stainless steel filter industry, the trade deficit between imports and exports continues to expand. The next few years will be a period of high-speed oscillation in the stainless steel filter industry, and the direct consequence of this high-speed oscillation is the widening trend of polarization in the brand camp. It is expected that there will not be so many companies that can truly survive in the market in the next few years. But this high-speed oscillation in the stainless steel filter industry will bring huge opportunities, and the result of the oscillation will make market operations more rational. The road to high-end localization is exceptionally bumpy. The basic components have become a shortcoming that restricts the high-end development of China's stainless steel filter manufacturing industry. During the 12th Five Year Plan period, the government will continue to increase the localization of high-end equipment components for stainless steel filters.