Heating boiler refers to a kind of thermal energy equipment that uses coal, fuel oil, gas, power and other fuels as heating sources to heat water or other medium to a certain temperature and through the pump, valve and heat sink to heat the local environment to achieve heating purposes. . According to different fuels, it can be divided into coal-fired heating boilers, fuel oil (diesel, kerosene, heavy oil, etc.) heating boilers, gas (natural gas, liquefied gas, city gas, biogas, etc.) heating boilers, electric heating boilers, etc.
Features of coal-fired heating boilers 1. The boiler is designed according to normal pressure. The top of the furnace body is provided with an air outlet. The boiler runs without pressure and the combustion operation is safe and reliable. Atmospheric hot water boilers can be installed in any place where they are used, and are not subject to a wide range of annual inspection procedures, and have been rapidly developed in recent years.
2. The vertical coal-fired atmospheric hot water boiler is mainly composed of a shell seal head, a furnace shell, a furnace top, a lower seal ring, a sky tube and a cross pipe. The combustion chamber is arranged in the furnace and the fuel is fixed in the furnace. It is burned and naturally ventilated. The flue gas flushes the cross pipe horizontally in the furnace, and is discharged into the atmosphere through the sky tube and chimney.
3. Vertical coal-fired hot water boiler, the furnace adopts water-cooled elbow structure, surrounded by furnace, large heating area, high thermal efficiency, energy saving and consumption reduction; the shell adopts elliptical head, and the grate adopts cast iron circular grate for a long time. Durable and long lasting.
4. The horizontal coal-fired hot water boiler is of a single-cylinder vertical type in the structure, and the water wall tube is installed on the left and right sides of the furnace, and the wing-shaped flue is formed, and the threaded tobacco pipe is arranged in the drum, and the coal leakage is rarely used. The active grate has a reasonable structure and high thermal efficiency, which greatly saves energy.
5. Horizontal coal-fired atmospheric hot water boiler adopts three-return water-fire tube structure with longitudinal arrangement of single-drum tube. The water-cooled wall tube is densely packed on both sides of the furnace. The design structure is reasonable and compact. The heating area is large and the flue gas flow is long. The heat transfer effect is good and the exhaust gas temperature is low, so the heat efficiency is high, the running cost is low, and the use is more economical.
6. Horizontal coal-fired boiler, after the fuel is burned on the grate, the flame passes through the low wall to the combustion chamber, from the combustion chamber through the wing flue on both sides to the front smoke box, and then the tobacco pipe bundle is bundled into the rear smoke chamber. Then, it is pumped into the atmosphere through the chimney by the induced draft fan, which not only prevents the bottom of the shell from being irradiated by the high temperature of the furnace, but also reduces the temperature of the inlet of the high temperature tube plate, and is supplemented by the return water, and there is no dead water area at the bottom of the drum. Effectively prevent the tube sheet from being fouled due to excessive cooling and boiling, and the convex bulge at the bottom of the furnace. The flue gas turns to the smoke chamber to remove dust and reduce the original dust concentration.
7. Vertical coal-fired atmospheric hot water boilers, the pipes of the heated area are all straight pipes, and there are enough hand-cleaning hand hole devices to facilitate manual mechanical cleaning of dirt and internal inspection. Horizontal coal-fired atmospheric hot water boiler with a large enough manhole on the upper part, personnel can enter the inside of the furnace from the manhole, which greatly facilitates the inspection and maintenance of the boiler.
8. The boiler body is compactly arranged, with small floor space and convenient transportation. It adopts fast loading and delivery, short installation period, low installation cost, less user input and quick recovery.
9. Coal-fired heating boilers are widely used in factories, hotels, hospitals, office buildings, schools, bathing centers, baths and other enterprises and institutions to meet the bathing, domestic hot water and heating requirements of the users.
Therefore, efficient, energy-saving, low-pollution industrial boilers using clean fuels and clean combustion technologies will be the trend of product development.
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