二、多层滤料的应用 (一)多层滤料的优越性根据上述过滤过程的基本机理和微凝絮法过滤概念,过滤技术改革的重要性是显而易见的。近20年左右,国内外也相继地提出和使用了各种类型的滤池,如接触澄清滤池、上向流过滤池、双向滤池、双层滤池等等,其中特别是双层滤料滤池在我国得到进一步的研究和发展。本文所提出的多层滤料滤池,是在双层滤料滤池基础上的进一步发 Second, the application of multi-layer filter material (A) the advantages of multi-layer filter material According to the basic mechanism of the above-mentioned filtration process and micro-flocculation filter concept, the importance of filtration technology is obvious. In the last 20 years or so, various types of filter tanks have been proposed and used at home and abroad, such as contact and clarification filters, upflow filter tanks, two-way filter tanks, and double-layer filter tanks. Among them, in particular, double-layer filtration The filter material has been further studied and developed in our country. The multi-layer filter filter proposed in this paper is further developed on the basis of double filter media.