After a period of operation, the multi-media filter must be cleaned. The following Shandong multi-media filter manufacturer will give you a detailed explanation of the cleaning steps!

1、放水

1. Drainage

开启多介质过滤器排气门、反洗排水门、正洗排水门，放水水位高出滤料20--40cm，关闭正洗排水门。（大约5分钟）

Open multi-media filter exhaust valve, backwash drainage door and forward wash drainage door, drain water until the water level is 20-40 cm higher than the filter material, and close the front wash drainage door. (About 5 minutes)

2、空气擦洗

2. Air scrubbing

开启多介质过滤器进风门，启动罗茨风机，对滤料擦洗5min，停罗茨风机，关闭进风门。

Open the multi-media filter intake door, start the Roots blower, scrub the filter material for 5 minutes, stop the Roots blower, close the intake door.

空擦中反洗排水管不应有大量水排出，容易跑滤料。若出现大量排水说明过滤器内部水位过高，立即停止空擦，继续放水。

The backwashing drain pipe should not discharge a large amount of water during air scrubbing, so it is easy to run off the filter material. If there is a large amount of drainage indicating that the water level inside the filter is too high, immediately stop empty wiping and continue to drain water.

3、反洗

3. Backwashing

开启多介质过滤器反洗进水门，启动清洗水泵，用进水手动门控制流量100--130m3/h，控制滤料膨胀高度不超过上监视窗中部，检查反洗排水无滤料，反洗排水清。

Open the multi-media filter backwash inlet door, start the cleaning pump, use the manual inlet door to control the flow rate of 100-130 m3/h, control the expansion height of the filter material not to exceed the middle of the upper monitoring window, check the backwash drainage without filter material, until the backwash drainage is clear.

4、上水

4. Upper Water

关闭反洗排水门，待排气门满水，停清洗水泵。关闭反洗进水门、反洗排水门、排气门，多介质过滤器清洗合格备用。

Close the backwash drain door until the exhaust valve is full of water. Stop cleaning the pump. Close the backwash inlet valve, backwash drain valve and exhaust valve, and clean the qualified backup filter with multi-media.

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