Multi media filter can use a single medium, or choose different media according to their own needs. The multi-media filter can also be divided into single multi-media filter and multi-media filter. Single media filter can also be called shallow media filter, its main filter media are generally quartz sand, granite and volcanic gravel.

多層介質(zhì)過濾器可稱為深 層次介質(zhì)過濾器，它的過濾介質(zhì)是由一種以上的過濾介質(zhì)組成，一般濾料有石英砂，活性炭，無煙煤，錳砂以及其他的接觸性介質(zhì)。

Multilayer media filter can be called deep media filter, its filter media is composed of more than one kind of filter media, the general filter media are quartz sand, activated carbon, anthracite, manganese sand and other contact media.

在過濾剛開始時，需要過濾的水會通過進水口進入介質(zhì)層，這時大部分的污染物會被攔截在介質(zhì)的上表面，少量比較細小的污物以及其他的浮動有機物會被截留在介質(zhì)層的內(nèi)部，使系統(tǒng)的出水水質(zhì)可以達到要求，保證系統(tǒng)在生產(chǎn)時不會受到污染物的干擾，可以良好的運行。

At the beginning of filtration, the water to be filtered will enter the medium layer through the water inlet. At this time, most of the pollutants will be intercepted on the upper surface of the medium, and a small amount of relatively small pollutants and other floating organic matter will be intercepted in the medium layer, so that the effluent quality of the system can meet the requirements, and the system will not be disturbed by pollutants during production, It can run well.

當(dāng)水質(zhì)中的雜質(zhì)和各種懸浮物到達一定量的時候，該過濾系統(tǒng)可以通過壓差控制裝置實時的檢測進出口的壓差，當(dāng)壓差達到設(shè)定值時，電控盒會給控制系統(tǒng)中的三通水力控制閥發(fā)送信號，三通水力控制閥會通過水路自動控制它所對應(yīng)的過濾單元三通閥門.

When the impurities and various suspended solids in the water reach a certain amount, the filter system can detect the pressure difference at the inlet and outlet in real time through the pressure difference control device. When the pressure difference reaches the set value, the electric control box will send a signal to the three-way hydraulic control valve in the control system, and the three-way hydraulic control valve will automatically control the corresponding three-way valve of the filter unit through the waterway

讓它可以關(guān)閉進口通道的同時打開排污通道，這時會由于排污通道的壓力會比較小，其他的過濾單元的水會在水壓力的作用下由通過該過濾單元的排污口進入排污管道，完成排污過程。

It can close the inlet channel and open the blowdown channel at the same time. At this time, because the pressure of the blowdown channel will be relatively small, the water of other filtering units will enter the blowdown pipeline through the blowdown outlet of the filtering unit under the action of water pressure, and complete the blowdown process.