A brief introduction to the filter

Filtration is divided into circulatory system filtration and on-time filtration, and most of the on-time filtration uses inverted trough filtration. No matter how good the filter is, how large the volume of the filter is, and how fine the filter material is, the filtration of the circulating system does not filter all the solid particles cleanly, because the saturated solution after filtering in the circulating system is always mixed with the saturated solution before filtration. When the filter is inverted, if the fineness of the filter material is 5μm, the solid powder exceeding 5μm can be filtered cleanly, because the saturated solution after filtering is not easy to mix with the saturated solution before filtration. However, filtration on time means that the saturated solution is not filtered during operation. At this time, the solid particles gradually accumulate, and the saturated solution is filtered again when it can no longer work. There is no doubt that the situation of saturated solution is not always. In order to better the saturated solution has been in a relatively stable working condition, more and more circulating system filtration is used.

When choosing a circulatory system for filtration, it is first necessary to decide how many times to filter the saturated solution per hour. For example, the volume of saturated solution is 1000L and the filtration volume is 1000L/h, that is, the saturated solution is filtered 1 times per hour. The strong alkaline solution can be filtered 1 to 2 times per hour with saturated solution, such as deoiled saturated solution and saturated alkaline zinc plating solution. On the one hand, this saturated solution has low filtration requirements, and on the other hand, this saturated solution has a high viscosity and is difficult to filter. Acid-base copper and nickel-plated saturated solutions should be filtered 3 to 5 times per hour. The saturated solution of electroless nickel should be filtered 10 times per hour to reduce the risk of solid particles dissolving the saturated solution. When selecting the volume of the filter press by filtering the saturated solution several times per hour, it is necessary to first clarify that the total flow of cold water at the bottom of the filter press refers to the larger total flow of the pump or the larger total flow of the filter. And the total flow of cold water is not the total flow of saturated solution, because the relative density and viscosity of the two are different. The specific filtering capacity of the filter press is also related to the frictional resistance of the pipeline and the environmental pollution of the filtering material. Liquid medicine distributors will strongly recommend the frequency of filtration of saturated solution per hour, but each company's product regulations are different, this value should be changed, and liquid medicine distributors will sometimes strongly recommend higher values ​​to reduce the problems that saturated solutions have to deal with.