Coal fired boiler refers to the coal burning fuel, coal heat after conversion, burning in the furnace to release heat, heat medium water or other organic heat carrier (such as thermal conduction oil, etc.) heating to a certain temperature (or pressure) of thermal power equipment. The heat is converted to steam or hot water, and the boiler service efficiency reaches above 85%.
According to the classification of use, coal fired boiler are divided into coal fired hot water boilers (heating and bathing), coal-fired steam boilers (steam supply), coal-fired thermal oil boilers (cooking and drying) and so on.
Coal Fired Boiler Introduction
Coal fired boiler use energy saving and environmental protection, using a single cylinder longitudinal arrangement of three return water and fire tube structure, furnace on both sides of the densely covered light tube water wall tube, design structure is reasonable and compact; The heating area is large, the flue gas flow is long, the heat transfer effect is good, the smoke exhaust temperature is low, so the thermal efficiency is high, the operation cost is low, the use is more economical.
Coal Fired Boiler Operating Principle
Coal fired boiler, after the fuel in the combustion flame after the low wall to the combustion chamber, the state from the combustion chamber state through two flanks form before the flue to smoke box, again by smoke tube bundle to the smoke chamber, then northwards by induced draft fan through the chimney discharged into the atmosphere, not only can prevent the at the bottom of the pot shell from furnace heat radiation, and can make high temperature smoke tube plate inlet temperature drops, and supplemented by water ejector, no dead zone at the bottom of the drum, also can effectively prevent the tube plate because too cold, boiling and scaling and furnace bottom convex hull, smoke to the smoke chamber can dust removal effect, also reduces the original exhaust dust concentration.
Coal fired boiler have compact layout, small footprint, convenient transportation, quick installation, short installation period, low installation cost, less user investment and fast recovery benefit.
Coal Fired Boiler Structure
The whole structure of coal fired boiler includes two parts: boiler body and auxiliary equipment. Boiler in the furnace, drum, burner, water wall, superheater, economizer, air preheater, frame and furnace wall and other main components constitute the core part of steam production, known as the boiler body. The two most important parts of the boiler body are the furnace and the drum.