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Bezrukov
Alexey
Director of Marketing and Technological Development
Dementiev
Alexey
Development Director
Denisov
Yuriy
Chief executive
Fedyakov
Denis
Commercial director

 

 

 

On-Line cleaning of fireside surfaces of Furnace Convection Section of Aromatics Complex

In July 2012 MAGIKROT's specialists realized the unique project - ONLINE cleaning of fireside surfaces of convection section of 7 fired heaters on Aromatics Production Complex of the Russian refinery.

The problem specified by the Customer was unsatisfactory furnace operation connected with the flue gas temperature at the outlet of the furnace convection section above recommended. This information related with the reduction of heat transfer was confirmed by visual inspection of the tubes condition which were completely covered with deposits. The deposits composition analysis revealed the presence of: unburnt carbon (15%) and inorganic compounds (85%) represented with corrosion products of coils and sulphur deposition.

MAGICROT's specialists conducted injection of reagent into fired  heaters  radiant sections through viewing windows for 5 days to each fired  heater. These fired  heaters had different design, size, service life and air blowers systems.

After cleaning, the customer was held start-up of fired heaters. The results of their work are as follows:

 

Parameters of fired heaters №1-4

Before cleaning

After cleaning

Flue gas temperature, °С

430.5

384.5

Decrease of flue gas temperature, °С

46

Coefficient of efficiency, %

70

75.95

Increase of coefficient of efficiency, %

5.95

 

Parameters of fired heater № 5

Before cleaning

After cleaning

Flue gas temperature, °С

379.9

340.6

Decrease of flue gas temperature, °С

39,3

Coefficient of efficiency, %

74,9

77,6

Increase of coefficient of efficiency, %

2.7

 

Parameters of fired heater № 6

Before cleaning

After cleaning

Flue gas temperature, °С

319,4

316,3

Decrease of flue gas temperature, °С

3,1

Coefficient of efficiency, %

78,1

79,8

Increase of coefficient of efficiency, %

1,7

 

Parameters of fired heater № 7

Before cleaning

After cleaning

Flue gas temperature, °С

310,8

307,1

Decrease of flue gas temperature, °С

3,7

Coefficient of efficiency, %

77,8

79,1

Increase of coefficient of efficiency, %

1,3

 


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