Soot blower and method of cleaning tubular heat exchanger by using the same

A soot blower which includes a flow path through which a fluid passes and cleans a tubular heat exchanger positioned on the flow path, the soot blower comprising:

• a lance tube which includes one end that reciprocally moves in one direction on a surface of an inlet port of the flow path;
• a drive unit which is connected to the lance tube, reciprocally moves the lance tube in the one direction, and rotates the lance tube clockwise and counterclockwise;
• the drive unit comprising:
• a reciprocating drive unit connected to the lance tube and configured to reciprocally move the lance tube in the one direction;
• the reciprocating drive unit comprising a sliding guide portion positioned on the lance tube and extending in the one direction;
• the reciprocating drive unit further comprising a sliding portion surrounding the sliding guide portion and configured to reciprocally move along the sliding guide portion;
• the reciprocating drive unit further comprising a connecting portion connecting the sliding portion and the lance tube;
• a rotating drive unit connected to the lance tube and configured to rotate the lance tube clockwise and counterclockwise;
• a first nozzle which is connected to the one end of the lance tube and discharges steam to the inlet port;
• a second nozzle which is disposed adjacent to the first nozzle and connected to the one end of the lance tube and discharges solid particles to the inlet port;
• and
• a nozzle maintenance chamber which is disposed adjacent to the drive unit and surrounds the one end of the lance tube;
• the nozzle maintenance chamber comprising a gate through which the first nozzle and the second nozzle are exposed.