1.Steps to clean the scale.

Wash washing: before the pickling, the heat exchanger should be opened, which can improve the effect of pickling and reduce the acid consumption. The cleaning liquid is poured into the equipment and then injected into the heat exchanger.

Pickling: the heat exchanger with a full acid solution is immersed in a static 2h. Then the continuous dynamic cycle is 3 ~ 4h. It's every zero. The 5h is alternately cleaned. After the acid wash, the acid solution should be diluted and removed.

After the alkaline cleaning, acid pickling, with NaOH, Na3PO4, demineralized water according to certain proportion, using dynamic circulation way to alkaline cleaning of heat exchanger, achieve acid-base neutralization, make heat exchanger plate no longer corrosion.

Wash: after alkaline wash, use clean softened water. The heat exchanger was rinsed 0 repeatedly.5h, thoroughly rinse the residue in the heat exchanger.

2. Measures to prevent scaling of plate heat exchanger.

In the operation, the water quality must be strictly tested on water and softening water in the system.

When the new system is put into operation, the heat exchanger should be separated from the heating system. After a period of circulation, the heat exchanger and the human system will be used to avoid the impurities in the pipe network into the heat exchanger.

Editor’s Note: This is a guest post from heating information on Wechat