| 摘要 |
<p>PURPOSE: To suppress pressure loss and noise and increase the flow rate of air supply medium, by providing a throttle device in a lance pipe in the vicinity of nozzles in a soot blower for cleaning the heating surface of a boiler or the like. CONSTITUTION: A lance pipe 1 having nozzles 2 at an end is connected to a wagon 4 driven by a motor 3. The wagon 4 and the lance pipe 1 are moved together on a support rail 5 and the lance pipe 1 is rotated. Thus, the lance pipe 1 is moved through the opening of the wall pipe 6 of a heat exchanger or the like. Then, a throttle device composed of an orifice 17 is disposed in the vicinity of the nozzles 2 in the lance pipe 1, and the orifice 17 is fixed to the lance pipe 1. Further, in the downstream side of the orifice 17, a measuring pipeline 18 and a pressure gauge 19 are provided to control the pressure of the air supply medium. According to this constitution, pressure loss and noise can be prevented and the flow rate of an air supply medium can be increased.</p> |
