Stainless steel filter elements have many advantages and a wider range of applications, but they should be cleaned during use to ensure that they are truly clean and hygienic.
1. Pickling cleaning method:
Chemical cleaning method-pickling method, dissolve potassium dichromate or sodium dichromate crystals with water to 60 to 80 degrees, and slowly add 94% concentrated sulfuric acid to a sufficient amount. When adding, the speed should be slow and stirring. When adding to 1200 ml, potassium dichromate or sodium dichromate is fully dissolved, and the color of the solution is deep red. At this time, the speed of adding concentrated sulfuric acid can be faster until it is completely added.
If the concentrated sulfuric acid has been added and there are still undissolved crystals, it can be heated to dissolve. The function of the cleaning fluid is to remove common pollutants, grease and metal particles on the wall of the titanium powder sintered filter element, and it can effectively kill the bacteria and microorganisms that breed on the filter element and destroy the heat source. If the filter element has been alkaline washed before, the alkaline solution must be washed first, otherwise the filter element will be contaminated by the precipitation of fatty acids.
2. Backwash cleaning method:
The backwash filter mainly uses a stainless steel filter element to physically filter the impurities in the water. The residue filtered by the filter element gradually increases, so that the pressure difference between the front and rear of the filter increases until it is blocked. When the filter retains excessive mechanical impurities and affects its normal operation, it can be cleaned by backwashing. Close one steering ball valve and open the other steering ball valve normally. Using reverse water inflow, the retentate adhering to the surface of the filter element is peeled off and taken away by the backwash water flow, which is beneficial to remove the sediment and suspended matter in the filter layer. And prevent the filter material from hardening, so that it can fully recover the dirt interception ability, so as to achieve the purpose of cleaning. The backwash cycle is generally one to four days.