Boiler with packaged heat exchanger for superheated steam control

Abstract

The present invention relates to a boiler with a packaged heat exchanger in which a heating passage and a cooling passage are packaged to generate superheated steam through heat exchange by exhaust gas and to adjust the temperature of the superheated steam to a suitable level for the use through heat exchange with air.

What is claimed is: 
     
         1 . A boiler comprising:
 a boiler body having a combustion chamber;   a burner for supplying flames to the combustion chamber of the boiler body;   a heat exchanger for discharging superheated steam through heat exchange with saturated steam supplied from the boiler body;   a diaphragm for dividing the heat exchanger;   a heating passage arranged on one side of the diaphragm to generate superheated steam through heat exchange between the saturated steam of the heat exchanger and exhaust gases from the combustion chamber; and   a cooling passage arranged on the other side of the diaphragm to lower the temperature of the superheated steam generated by the heating passage through heat exchange with air.   
     
     
         2 . The boiler according to  claim 1 , wherein the air preheated through heat exchange with the heat exchanger while passing through the cooling passage is supplied to the burner for using the air as combustion air. 
     
     
         3 . The boiler according to  claim 2 , further comprising:
 a damper for controlling the volume of air supplied to the cooling passage to adjust the temperature of the superheated steam.   
     
     
         4 . The boiler according to  claim 3 , further comprising:
 a bypass passage which bypasses some of the air supplied by the damper to supply the air to the burner.   
     
     
         5 . The boiler according to  claim 4 , further comprising
 a blower capable of rotational speed control by an inverter to control the total volume of the air supplied to the damper.