Sootblower with lance bypass flow
A sootblower is described for cleaning surfaces within a heat exchanger comprising: a hollow lance tube having distal and proximal ends; at least one discharge nozzle affixed to the lance tube and communicating with the interior of the lance tube; means in communication with the proximal end of the lance tube for supplying a pressurized blowing medium to the interior of the lance tube for discharge through the nozzle and for impingement upon the heat exchanger surfaces; drain means for creating a return flow path for the blowing medium from the lance tube and for disposing of a return flow of the blowing medium externally of the heat exchanger; and means for controlling the flow of the blowing medium through the nozzle and the return flow path whereby during operation of the sootblower the flow of blowing medium through the nozzle can be varied between a high flow rate for cleaning and a reduced flow rate when the nozzle is not directed toward a surface to be cleaned.
- Assignee:
- Babcock and Wilcox Co., New Orleans, LA (United States)
- Patent Number(s):
- A; US 5237718
- Application Number:
- PPN: US 7-877641
- OSTI ID:
- 6255033
- Country of Publication:
- United States
- Language:
- English
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