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Alexey
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Alexey
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Yuriy
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Denis
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On-Line cleaning of heating surfaces of Waste Heat Boiler of Crude Oil Distillation Unit (CDU)

In August 2012 MAGICROT held ONLINE cleaning of external surface of WHBs tubes at Crude Oil Distillation Unit (CDU) of major Russian refinery.

    The problem specified by the Customer was unsatisfactory Waste Heat Boilers operation connected with low steam capacity. The deposits composition analysis revealed the presence of: unburnt carbon (12%) and inorganic compounds (88%) represented with corrosion products of coils and sulphur deposition.

    MAGICROT's specialists conducted the injection of reagent into WHB inside zone for 5 days to both waste heat boilers. The injection was carried out through access hatches. To enhance the action of the reagent, deposits were blown by compressed air. Waste Heat Boilers were the same type and differed only in terms of operation.

The results of WHB work are as follows:

Parameters of Waste Heat Boilers №1

Before cleaning

After cleaning

Superheated steam capacity, t/h

14,3

18,3

Increase of superheated steam capacity, t/h

4,0

 

Parameters of Waste Heat Boilers №2

Before cleaning

After cleaning

Superheated steam capacity, t/h

12,5

15,1

Increase of superheated steam capacity, t/h

2,6

That work is the only option to optimize waste heat boilers operation without stopping due to a planned shutdown date only in 2014


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