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Wall Blower

The Wall Blower is fully retracted from the furnace when not in use to protect the nozzle and screw tube from the furnace high heat conditions.

 
The Wall Blower VS-H is used for the cleaning of heat exchangers, DeNOx, air preheaters and gas-gas heaters with steam/air at flue gas temperatures < 2,800°F. The Wall Blower F149 is used for the cleaning of wall heating surfaces with heavy slagging with the cleaning medium water.

Principle of cleaning

Wall Blower VS-H

  • The nozzle head with two opposite high-performance nozzles is axially moved into the boiler
  • The blowing process begins as soon as the nozzle head has reached the blowing position
  • During this process the tube wall is cleaned in circular form
  • A special control of the valve also enables cleaning of specific segments
  • After performing the necessary number of rotations the nozzle head returns to its rest position

 

Wall Blower F149

  • The lance tube with two opposite special nozzles is helically moved into the boiler
  • The blowing process begins as soon as the nozzle head has passed through the tube wall
  • During the blowing process the lance tube continues to move helically into the boiler
  • During this process the tube wall is cleaned in circular form
  • A special control of an additional solenoid valve also enables cleaning of specific segments
  • On reaching the front-side end position the direction of movement changes and the lance tube returns to its rest position
Features:

Wall Blower VS-H

  • Force actuated blowing valve to avoid any uncontrolled steam flow
  • High temperature-resistant nozzle head material and stainless steel feed- tube material     
  • High performance nozzles for maximum conversion of steam pressure to jet velocity for high cleaning efficiency
  • Sturdy tube spindle in lines with overall product stability
  • Integrated stop valve with adjustable throttle disc for comfortable adjustment of the blowing pressure
  • Temperature-resistant nozzle head material
  • High-performance nozzles

Wall Blower F149

  • Integrated stop valve
  • Adjusted droop velocity of the water jet preserves the tube wall during cleaning
  • Temperature-resistant lance tube material
  • Special nozzles
  • Stainless feed tube material
  • Sturdy driving spindle
Benefits:
  • Extends boiler availability and increases boiler efficiency
  • Checks deposit build-up regardless of flexible boiler operation and changing fuel mixture or varying fuel quality
  • Prevents slagging in the furnace area
  • Maximizes thermal efficiency and reduces gas exit temperatures
  • Reliable and simple to maintain
  • Optimizes cleaning effect and minimizes consumption of steam, water  and air