According to the structure form of industrial boiler, industrial boiler can be divided into industrial fire tube boiler and industrial water tube boiler. Fire tube boiler is a kind of industrial boiler. The common structure of the boiler is that there is a large diameter boiler barrel with a fire tube and a large number of thin tubes inside.
Industrial fire tube boilers are those in which the flue gas from the combustion of fuel flows through a fire tube or pipe and heats the mixture of water, steam, or soda outside the fire tube or pipe. Fire tube boiler is also called boiler shell boiler. Due to the limitations of its structural conditions and characteristics, the fire-tube boiler has low efficiency and is generally used for users with small capacity.
Its basic structure is to install a small cylinder, fire tube or furnace bile in the pot shell. The fire tube is isolated from the pot shell and forms a jacket in which water is contained, while the fire tube and the furnace bile are used as the combustion chamber and flue gas to contain the flame or flue gas, and the heat generated by the combustion or flue gas is transmitted to water through the wall of the fire tube. According to its layout direction, the main structure forms can be divided into vertical and horizontal.
Fire tube boilers are a lower cost alternative to water tube boilers and are often used for smaller industrial facilities with lower operating pressures. The main advantages of a fire tube boiler are its simple construction, compact size and the ability to easily meet rapid fluctuations in steam demand.
Advantages of fire tube boiler
- Simple structure, easy operation and convenient maintenance.
- Fewer faults, easy maintenance and low maintenance cost.
- Safe and efficient, energy saving and environmental protection
- Wide adaptability of fuel and low requirements on water quality
- Small capacity, suitable for making hot water, less heat requirements of the occasion
Disadvantages of fire tube boiler
- The thermal efficiency is not as high as that of a water-tube boiler, which can only reach 70%~75% on average and only 80% at the highest.
- More water storage, in case of rupture of a large range of victims.
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