Definition and Composition of Boiler
1. Definition of boiler: A heat exchange device that converts the chemical energy released by the combustion of fuel (solid fuel, liquid fuel and gas fuel) into heat energy and outputs hot water or steam to the outside.
2. The composition of the boiler: The boiler is composed of two parts: "pot" and "furnace". "Pot" refers to the steam-water flow system, including the drum, header, water wall and convection heating surface, etc., which is the heat-absorbing part of the heat exchange equipment. "Furnace" refers to the fuel combustion space and the smoke air flow system, including the furnace door, Convection flue and bacon, etc., are the exothermic parts of heat exchange equipment
3. Classification of boilers
There are many classification methods for boilers, the main classification methods are
Classification by purpose
Power generation boiler: refers to a boiler used for thermal power generation. The thermal power generation unit consists of two major power equipments: steam boiler, steam turbine and generator. The high-temperature and high-pressure steam produced by the boiler passes through the steam turbine to do work, so that the thermal energy of the steam is converted into mechanical energy. The steam turbine drives the generator to rotate at high speed to generate electricity. At this time, the mechanical energy is converted into electrical energy.
Industrial boiler: refers to the high-temperature heat carrier (steam, high-temperature water and organic heat carrier) produced by the boiler for use in industrial production processes, such as brewing, papermaking, textiles, wood, food, chemicals, etc.
Domestic boiler: refers to the hot water and steam produced by the boiler for people's daily life, such as heating, bathing, disinfection, etc.