What does the boiler burn?

Use chemical energy such as coal and natural gas to heat boiling water for production and business activities.

Working principle:

The boiler operates in both "pot" and "furnace". After the water enters the boiler, the heat absorbed by the heating surface of the boiler will be transferred to the water in the steam-water system, so that the water can be heated into hot water or steam at a certain temperature and pressure, and then exported for supply. In the part of combustion equipment, fuel combustion releases heat continuously, and the high-temperature flue gas generated by combustion transfers heat to the heating surface of the boiler through heat transfer, and its temperature gradually decreases, and finally it is discharged from the chimney.

standard of classification

There are many classification methods of boilers, which can be classified according to the purpose of boilers, boiler structure, fuel types, water circulation and pressure forms.

1, classified by boiler use

Boilers can be used as thermal boilers and heating boilers. Power boilers include power station boilers, ship boilers and locomotive boilers, which are used for power generation, ship power and locomotive power. Heating boilers include steam boilers, hot water boilers, heat pipe boilers, hot air stoves and heat carrier heating furnaces. And obtain steam and hot water accordingly. Hot air and heat carrier, etc.

2, according to the boiler body structure classification

According to the boiler structure, it is mainly divided into fire tube boiler and water tube boiler. Fire tube boilers include vertical boilers and horizontal boilers, and water tube boilers include horizontal water tube boilers and vertical water tube boilers.

3, according to the classification of boiler fuel.

According to the types of fuel used in boilers, bandits include coal-fired boilers, oil-fired boilers, gas-fired boilers and upgrading technologies of coal-fired boilers, as well as alternative products of oil-gas boilers-pulverized coal boilers and gas-fired boilers. Coal-fired boilers can be divided into layer-fired boilers, chamber-fired boilers and boiling boilers according to combustion modes.

4, according to the boiler capacity classification

Small boilers with evaporation less than 20t/h, large boilers with evaporation more than 75t/h, and medium-sized boilers with evaporation between them.

5, according to the boiler pressure classification

Boilers below 2.5MPa are called low-pressure boilers, those above 6.0MPa are called high-pressure boilers, and those with pressures between them are called medium-pressure boilers. In addition, there are ultra-high pressure boilers, subcritical boilers and supercritical boilers.

6, according to the boiler water circulation form classification

According to the form of boiler water circulation, it can be divided into natural circulation boiler and forced circulation boiler (including once-through boiler).

7. Classification by equipment form

It can be divided into fast-loading boilers, assembled boilers and bulk boilers. In addition, there are wall-hung boilers, vacuum boilers and modular boilers.