Working principle of gas hot blast stove: it is divided into two kinds. One is the direct high purification gas hot blast stove. The principle of this gas hot blast stove is to use fuel to burn directly and form hot air after high purification. This principle is relatively large for fuel consumption, and easy to be dry objects cause pollution, the general use of less. The other is indirect gas hot blast stove. The working principle of this gas hot blast stove is the use of heat exchange, in this process, the dried object does not directly contact with the gas hot blast stove, which can avoid pollution.
According to different needs and different fuels, develop a variety of hot blast stoves
For a long time, people have developed a variety of hot blast stoves according to different needs and different fuels.
At present, the main heat sources used in hot blast stoves are natural gas, coal, electricity, oil and solar energy. The main heating forms are direct flue gas and indirect heat transfer. The type of heat exchanger is more complex and changeable, there are tubular, tubular and heat pipe type.
Hot blast stoves can be classified according to fuel, combustion mode and heating mode.
According to the fuel type, it can be divided into solid fuel hot blast stove, liquid fuel hot blast stove and gas fuel hot blast stove.
According to the different fuel or heat source, it can be divided into biomass burning hot blast stove, gas hot blast stove, coal burning hot blast stove, oil burning hot blast stove, electric heater and solar collector, etc.
According to the heating form, there are mainly direct flue gas hot blast stove and indirect heat transfer hot blast stove. Indirect heat transfer hot blast furnace can be divided into heat conduction oil heating furnace, steam hot blast furnace, flue gas hot blast furnace and so on according to different heat carriers. According to the different forms of heat exchanger, it can be divided into tubular hot blast furnace, tubular hot blast furnace, heat pipe hot blast furnace, etc.
There are basically three combustion modes of solid fuel in the furnace: layering combustion, suspension combustion and boiling combustion. The corresponding combustion equipment is called layer burning hot blast stove, suspension burning hot blast stove and boiling hot blast stove respectively. Layer combustion furnace is separated from pouring hot blast furnace, chain hot blast furnace and reciprocating grate hot blast furnace.
