Coal-fired boiler refers to the boiler equipment with bituminous coal, lean coal, anthracite and other kinds of coal as fuel. There are many kinds of coal-fired boilers in the market, and users often can't distinguish them correctly. What are the classifications of coal-fired boilers, and how many kinds of boilers are included?
Principle of coal-fired boiler
Before introducing the classification of coal-fired boilers, let's first understand what coal-fired boilers are. Coal-fired boile...
15t coal-fired steam boiler refers to the boiler equipment which takes all kinds of coal as fuel, generates 15t steam per hour under the rated working pressure after the heat of coal is converted. When purchasing a 15t coal-fired steam boiler, users need to pay attention to the analysis of technical parameters, which is not only related to the purchase price, but also determines whether the daily heat demand can be met in the later period. Here, ZOZEN Boiler focuses on introducing the common 15t...
It can be found that there are the following differences between vertical coal-fired hot water boiler and horizontal coal-fired hot water boiler by analyzing the structural diagram of vertical coal-fired hot water boiler:
The heat transfer of vertical coal-fired hot water boiler and horizontal coal-fired hot water boiler
The exhaust gas flow produced by the vertical coal-fired hot water boiler flows vertically to the heating surface from top to bottom, and the exhaust gas temperatu...
Chain boiler is a kind of mechanized combustion boiler equipment which is widely used in industrial boilers. It is named for its grate similar to chain crawler. There are many types of boiler parameters, but they must be understood by users when selecting the boiler. ZOZEN Boiler introduces the parameters of 20-ton chain grate boiler.
The 20-ton chain grate boiler drives the chain grate to rotate through the reducer, which makes the solid fuel catch fire from the front and burn out at the tail ...
Advantages:Chain grate is a kind of better combustion equipment in layer combustion furnace. Compared with gas-fired boilers on the market, the solid fuel used in chain grate boiler does not need pipeline laying, and the cost is relatively low. Moreover, the chain grate boiler system is simple, and the manufacturing cost and operating cost are relatively low.
Disadvantages:The chain grate boiler has a limit on the coal types. The combustion mode of the chain grate is moving hearth combusti...
Chain grate has certain selectivity for coal types, and soft coal with volatile content above 15%, ash melting point above 1250℃, moderate particle size and calorific value above 18800~21000kJ/kg is more suitable.
The type and parameters of coal-fired boilers are the direct factors affecting the cost of a small coal-fired boiler. For example, rated capacity, rated steam pressure, rated steam temperature, feed water temperature, etc. With different parameters, the more requirements, the higher the price.
The efficiency of a coal-fired boiler depends on the loss of the boiler, the best efficiency in the boiler can be achieved if the losses are kept to the minimum. Since 50% of the losses are dependent on the fuel and ambient condition, the best efficiency can be achieved by properly tuning the other 50%, i.e. mainly carbon loss and dry gas loss.
