First, they use coal-fired boiler combustion grate firing combustion, coal by coal conveyor chain grate plane, complete the combustion process in the furnace. They use the gas boiler fuel combustion chamber, the gas is mixed with air in advance is set in proportion to the burner, injected into the furnace through a nozzle, the torch was complete combustion state in the furnace. Second, the automatic control of the force due to coal-fired boilers factors coal, coal seam thickness, the amount of blowing, the wind amount, and the air volume distribution grate speed limit, to be difficult to automatically adjust the operating parameters of the boiler according to the load. And high-quality gas boilers less impact on factors, may be adjusted only according to a load size of the fire burner, easy to achieve automatic control of three, mainly by the combustion products of coal C, H, O, N and other elements, the composition of the ash and water , but not the surface of the mixed ingredients, but a more complex compounds. After the heat released by combustion of coal, oxygen and other sulfide generation by the flue gas into the atmosphere, these gases are very polluting the environment, on human harm. While natural gas used in the gas boiler, the main component is methane gas, and a small amount of non-hydrocarbon gas, generally free of moisture and ash, and thus produce mainly carbon dioxide and water upon combustion emit a lot of heat, compared to coal, hazardous substances is significantly reduced.

Greater than 65t / h industrial boiler of what air pollutant emission standards should be executed? A: The State Environmental Protection Administration, Central Division-standard [1993] No. 012 document pointed out that the emergence of a small number of parameters currently higher than GB1921-80 "industrial steam boiler parameters Series" and GB3166-82 "dzl coal fired hot water boilers parameters Series" layer burning, stoker boiler, regardless of its use Zanan GB1327-91 execution. Therefore> 65t / h or more (except coal, circulating fluidized bed, and fuel, gas fired boilers) industrial boilers should be performed "boiler air pollutant emission standards."

Hot water boiler in the school dormitory and classroom building are generally used for central heating, drinking water and bathing water aspects of teachers and students and so on. Shanxi Linxian County high school is an important educational school personnel training for the community. 2017, the school responded positively to national coal to gas and other environmental policies, but also to provide students with a more favorable living and learning environment, the school decided to phase out conventional coal-fired boilers, clean and environmentally friendly replacement for the gas boiler. After getting to know and choose the boiler industry, major companies, determined cooperation with professional production of clean fuel boiler fast boiler-by-side to provide a fast 4.2MW integrated condensing gas dzl coal fired hot water boilers (WNS4.2-1.0 / 115 / 70-YQ).

Effect of boiler fine coal combustion boiler operating principle is to use thermal energy or heat in industrial post fuel released by combustion is transferred to the water in the container, the temperature or pressure of the water reaches a certain desired steam heating equipment. Many people will feel that coal-fired boiler more detailed the better, but is it really? From a combustion point of view, the finer coal particles more easily form a good mixing with the air, the more complete the combustion. But the coal particles too small, for boilers, milling power consumption will be greatly increased. Industrial boiler, the coal into the furnace too small, there will be the following questions: 1, coal leakage losses, etc. from grate gap increased. 2, boiler grate to be at full speed, power consumption increases. 3, fly ash, fuel loss increases. 4, a coal burning ember i.e., unstable combustion, furnace volume heat load difficult to sustain stable. So the boiler when using fine particles of coal, coal is subject to how much water, raw coal water, play groups and then into the furnace. If the burning coal of 8 to 12h before the water, so that the penetration of moisture into the interior of the coal particles is better. Water vapor produced is moistened triatomic gases, flue gas can strengthen radiation, facilitate ignition, exhaust and reduce heat loss