STEAM HEATING APPARATUS

PROBLEM TO BE SOLVED: To provide a steam heating apparatus capable of preventing temperature irregularity in a heat exchanger. SOLUTION: A steam supply tube 2, a steam ejector 4 and a circulation passage 5 are connected on the upper side of the heat exchanger 1. A control valve 7 is attached to the steam supply tube 2. One end of the circulation passage 5 is connected to a suction part of the steam ejector 4. A compressed air supply tube 3 is connected to a part of the circulation passage 5 by interlaying a control valve 13. A part of the circulation passage 5 is branched and a predetermined-temperature fluid discharge tube 12 is connected thereto. A pressure sensor 10 and a temperature sensor 11 are attached to the heat exchanger 1. The steam and the compressed air are mixed in the steam ejector 4 and supplied to the heat exchanger 1. A part of the mixed fluid in the heat exchanger 1 is sucked from the one end of the circulation passage 5 into the steam ejector 4, whereby the steam and the compressed air in the heat exchanger 1 are always surely agitated and mixed and temperature irregularity is never generated. COPYRIGHT: (C)2006,JPO&NCIPI