5.5.1 Cleaning In Place (Optional)

就地清洗（可選）

The CIP of the decanter is carried out in two steps:

離心機的CIP清洗是在兩個步驟中進行：

First a High-speed CIP at full bowl speed, which is followed by a Low-speed CIP at speeds corresponding to just under 1*g (50 - 150 rpm).

*個高速CIP在滿轉(zhuǎn)鼓的速度，其次低速CIP在對應(yīng)于在1^×g的速度（50 - 150 rpm）。

    While the high-speed CIP is performed, the pipings, the inlet parts, and the outside of bowl and decanter casing are cleaned. The sludge remaining in the bowl after completion of the high-speed is cleaned out during the low-speed CIP.

    轉(zhuǎn)鼓，離心機的罩殼同時進行高速CIP清洗，剩余污泥在轉(zhuǎn)鼓里由高速和低速清洗

When terminating the separation performance, the decantershould be prerinse with water until all visible solids and process material have been removed before using a liquid with cleaning detergent.

離心機停止分離后，應(yīng)預(yù)用清洗水清洗直到所有可見的固體材料及工藝已在使用液體清潔劑去除。

In most cases water alone cannot remove the dirt and deposits, its removing power being insufficient.

在通常情況下，憑借水的力量是不能*去除所有沉積的污垢。

   Chemicals such as sodium hydroxide, also known as caustic soda, must be added in order to achieve a satisfactory result. Caustic Solution: 1-1.5% NaOH, to ensure a pH value of 12 to 13. A detergent compound of NaOH with an admixture of complexing agent such as sodium-polyphosphates, EDTA, or should be used.

為了達(dá)到滿意的清洗效果，必須添加化學(xué)試劑如氫氧化鈉，也稱為燒堿，其濃度為1-1.5 %，pH值12到13。NaOH洗滌劑化合物復(fù)合劑如EDTA，三聚磷酸鈉，。

An acid cleaning could be carried out as a supplement to thecaustic cleaning. Nitric acid (HNO), concentration 0.5%, is suitable.

合適的酸洗可以代替堿洗。如濃度為0.5%硝酸（HNO）。