Coal and air enter a fluidized combustion chamber, and there's mixing and burning, and smoke in the oven with a large amount of fine particles. After the export, the air-solid separator separates the solid material that it contains, the flue gas enters its tail to the heated surface, and the material collected by the separator is sent into the combustion chamber through the recycler. 1. Fuel adaptivity is widespread. In circulatory fluidized bed boilers, fuel accounts for only about 3% of the bed mass, and the rest is non-flammable solid particles. The special hydrodynamic properties of the circulatory fluid-bed boiler make the mixing of gas and solidity very good, so the fuel is quickly mixed with a large quantity of bed materials when it enters the furnace, and the fuel is rapidly heating up to the temperature of the fire, while the temperature of the bed layer is not significantly reduced. Thus, all coal species can be burned in a stable and efficient manner. When the coal is being converted in operation, higher combustion efficiency can be achieved without any modifications to the combustion equipment and boiler body. 2. The fundamental difference between burning efficiency and circulation fluidized bed boilers and other types of boilers lies in the combustion system. The combustion system of the circulatory fluidized bed boiler consists of a combustion chamber, a material collector and a recycler. High-temperature material enters the material collector under the gas stream, and the collected material enters the recycler, then the remixer returns back to the combustion chamber, and there are multiple cycles of combustion, so the combustion is very efficient. When the load is reduced to less than 70%, other types of boilers will experience a significant reduction in the combustion rate and thermal efficiency, which are unstable, and sometimes do not maintain normal combustion; the cycling fluidized bed only needs to regulate the amount of coal, the amount of air and the amount of retort, so its load can be adjusted between 30% and 110%; and the cycling fluidized bed boiler load can be adjusted at a fast rate of 4% per minute due to high transect wind speed and easy heat control. 4. Clean combustion techniques. Circulation fluidized bed boilers add limestone to the furnace, allowing simple desulphurization in the furnace, and can be more than 80% desulphurized when calcium sulfur is 2; nox generation is extremely low due to the use of graded wind delivery and low temperature combustion during operation. Therefore, the emissions of sox and nox are significantly reduced, improving atmospheric and environmental quality. Easier integrated use of ash is achieved the circulatory fluidized bed boilers are low-temperature combustion, while the low carbon content of the ash in the boiler, which is a condition of excellent combustion, is low-temperature burning and easy to achieve integrated use. 6. There are no problems of wear and tear in the cavity of the cascading tube without hot surfaces in the bed and in the circulatory fluidized bed boiler without hot surfaces. In addition, because of the absence of hot surfaces in the bed, it's easy to start, to stop the stove, and to start directly after a long period of pressure. The main structural characteristics of the circulatory fluidized bed boiler are as follows: (1) the boiler structure is (single) a double-cooked natural cycle boiler; (2) the chamber export is equipped with a parallel high-temperature cyclone separators, operating in a stable and efficient manner. (3) trunches made of imported heat-resistant steel, high temperature and wear and tear. (4) the recycler uses two small u valves, with double-point refills, which, for example, are distributed evenly, do not form local piles on the windscreen, affecting the flow quality. (5) u-type refuellers, the feed is automatically balanced with the feed, and no artificial regulation is required in operation. (6) the water-cooled walls and smoke-windows under the furnace are entangled around the hot wire to ensure the operational life of the hot surface. (7) no hot surface of the catheter, no wear of the catheter. (8) the fluidized bed chamber, cyclone separators, etc., are used to withstand grinding into bricks and grinding in fluidized beds to ensure the long-term safe operation of the boiler。
