5.5.1 Cleaning In Place (Optional)

就地清洗（可选）

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

离心机的CIP清洗是在两个步骤中进行：

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).

*个高速CIP在满转鼓的速度，其次低速CIP在对应于在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.

    转鼓，离心机的罩壳同时进行高速CIP清洗，剩余污泥在转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.

离心机停止分离后，应预用清洗水清洗直到所有可见的固体材料及工艺已在使用液体清洁剂去除。

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

在通常情况下，凭借水的力量是不能*去除所有沉积的污垢。

   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.

为了达到满意的清洗效果，必须添加化学试剂如氢氧化钠，也称为烧碱，其浓度为1-1.5 %，pH值12到13。NaOH洗涤剂化合物复合剂如EDTA，三聚磷酸钠，。

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

合适的酸洗可以代替碱洗。如浓度为0.5%硝酸（HNO）。