The main factors to be considered in the design of multi-media filter are as follows:

1、不同濾料具有較大的密度差，保證反洗擾動(dòng)后不會(huì)發(fā)生混層現(xiàn)象。

1. Different filter media have large density difference, which ensures that there will be no mixed layer after backwashing disturbance.

2、根據(jù)產(chǎn)水用途選擇濾料。

2. Select filter material according to the use of water production.

3、粒徑要求下層濾料粒徑小于上層濾料粒徑，以保證下層濾料的有效性和充分利用。

3. Particle size requires that the particle size of the lower filter material is smaller than that of the upper filter material, so as to ensure the effectiveness and full utilization of the lower filter material.

事實(shí)上，以三層濾床為例，上層濾料粒徑大，有密度小的輕質(zhì)濾料組成，如無(wú)煙煤、活性炭；中層濾料粒徑居中，密度居中，一般為石英砂組成；下層濾料由粒徑小，密度大的重質(zhì)濾料組成，如磁鐵礦。由于密度差的限制，三層介質(zhì)過(guò)濾器的濾料選擇基本上是固定的。上層濾料起粗濾作用，下層濾料起精濾作用，這樣就充分發(fā)揮了多介質(zhì)濾床的作用，出水水質(zhì)明顯好于單層濾料的濾床。而對(duì)于飲用水，一般禁止使用無(wú)煙煤，樹(shù)脂等濾料。

In fact, taking the three-layer filter bed as an example, the upper filter material is composed of light filter material with large particle size and small density, such as anthracite and activated carbon; the middle filter material with medium particle size and medium density is generally composed of quartz sand; the lower filter material is composed of heavy filter material with small particle size and high density, such as magnetite. Due to the limitation of density difference, the selection of filter material for three-layer media filter is basically fixed. The upper filter material plays the role of coarse filtration, and the lower filter material plays the role of fine filtration, thus giving full play to the role of multi-media filter bed, and the quality of effluent is obviously better than that of single-layer filter material. For drinking water, anthracite, resin and other filters are generally prohibited.

本文由山東多介質(zhì)過(guò)濾器廠家提供技術(shù)支持，更多的詳細(xì)精彩內(nèi)容請(qǐng)點(diǎn)擊我們的網(wǎng)站：http://m.tiaoi.com.cn，我們將會(huì)全心全意為您提供滿意的服務(wù)。

This article is supported by Shandong Multimedia Filter Manufacturer. For more details, please click on our official website: http://m.tiaoi.com.cn. We will provide you with satisfactory service wholeheartedly.