ANGLE VARIABLE TYPE GAS BLOWING-IN DEVICE

摘要

PROBLEM TO BE SOLVED: To enable action of exhaust gas generated through combustion of dust to be automatically controlled even if a combustion position of dust in a primary combustion chamber is varied by changing the blowing angle of recirculated exhaust gas or external air supplied into a furnace appropriately in response to a combustion state of dust in the primary combustion chamber.SOLUTION: This invention relates to a variable angle type gas blowing-in device in which a hole (11) with bottom of rectangular shape in its cross section is formed at a furnace wall, a communicating space (12) connected to the inside of the furnace from the bottom of the hole (11) with bottom is formed, an L-shaped bent nozzle (14) including a short pipe segment (14a) having a nozzle port (13) at its extremity end and a long pipe segment (14b) communicated with the base end of the short pipe segment (14a) is inserted from the short pipe segment (14a) into the hole (11) with bottom while the nozzle port (13) is faced toward the inside of the furnace, and then, the nozzle (14) is moved into the inside of the furnace, the short pipe segment (14a) is passed into the communicating space (12), a motor for reversely turning the L-shaped bent nozzle (14) by a prescribed angle is installed at the base end part of L-shaped bent nozzle (14). The communicating space (12) has a space of triangle shape of cross section in which the short pipe segment (14a) can be oscillated around the long pipe segment (14b) by the reversing.