When the coal fired steam boiler is running, the fuel vibrates from the vibration feeder to feed, and the flame passes through the rear wall to the combustion chamber, up the airfoil flue, and then through the smoke box thread pipe, and then through the energy saver (optional), the air preheater (optional), the dust collector is pumped to the chimney atmosphere by the induced draft fan. Coal fired boilers supply are mainly used to provide saturated steam. Single return thread pipe is used in the barrel to enhance the heat transfer effect, and the thread pipe has the function of self-cleaning ash, to avoid ash accumulation in the pipe.
This series of steam boiler is water fire tube boiler, the second return using “airfoil” flue, can prevent the rear tube due to subcooled boiling crack. Boiler automatic water refill, and equipped with electrode, low safety water level alarm interlock protection. This series of boiler products are equipped with high quality valves and reliable auxiliary machines and accessories to ensure efficient and reliable operation of the boiler. The boiler adopts heat transfer technology of low resistance, high expansion type screw pipe, high thermal efficiency.
Coal fired boilers supply using new arch furnace, furnace volume. And a dust separation steering chamber is arranged at the rear of the furnace. The unburned dust particles fall into the furnace for secondary combustion. At the same time, it is equivalent to a dust removal in the furnace to ensure that the original dust concentration is lower than the standard allowable value. It reduces fuel consumption and protects the environment. The coal-fired steam boiler optimize the design of water supply device, so that the high temperature area of the boiler shell, due to excessive heat rise of the water level can be reduced. Optimized design of steam separation device is conducive to gravity separation of soda water. Keep the steam humidity below 1%, significantly below the standard of 4%.
Application of advanced water circulation technology and optimization of boiler structure for coal-fired steam boiler. Improved working conditions of high temperature tube plate, water wall tube and bottom of pot shell. DZL type steam boiler under normal water quality conditions, there will be no tube explosion, tube plate cracking, pot shell bottom bulge and other problems. Because the boiler water capacity is large, when a sudden power failure, without the use of special protection measures, it can prevent the heating surface and pot shell media due to possible vaporization caused by the damage accident. The safety and reliability of the boiler are guaranteed, and the operating cost is much lower than other furnace types.
Coal fired boilers supply have low and operation cost, safe and reliable use, short installation time and low installation cost. Compared with other furnace models, the installation cycle and installation cost can be reduced by more than 30%. When the average smoke speed in the tube of this type of boiler is designed reasonably, the output and thermal efficiency of the boiler will not decrease with the extension of the operation period because there is basically no ash accumulation during operation. Even under the condition of less than half of the load, soot may accumulate at the tail of the smoke pipe, but it is less than that of the dense exhaust pipe, and it is easy to remove.