First of all, we know that the circulating fluidized bed boiler uses the most industrialized clean coal combustion technology. The circulating fluidized bed boiler adopts fluidized combustion, and the main structure includes two parts: the combustion chamber (including the dense phase zone and the dilute phase zone) and the circulating back to the furnace (including the high-temperature gas-solid separator and the return system). The fluidized bed combustion boiler has a high operating wind speed, which intensifies the heterogeneous reaction processes such as combustion and desulfurization. The capacity of the boiler can be expanded to a large capacity acceptable to the power industry, and it can well solve basic problems such as heat, mechanics, and materials, as well as engineering problems such as expansion, wear, and over-temperature.
The inlet flue gas temperature of the high temperature separator of the bituminous coal circulating fluidized bed boiler is about 800 ℃, the inner diameter of the cyclone is small, and the structure is simplified. Only a thin layer of anti-wear lining (silicon nitride brick) is needed in the cylinder. Its service life is longer. The cycle rate is about 10-20. The circulating ash conveying system is mainly composed of a return pipe, a return device, an overflow pipe and an ash cooler.
The use of fluidized bed combustion boiler can protect the environment and save energy is the primary consideration for the long-term development of various countries. This series of CFB boilers are developed based on this point, has high reliability, high stability, high availability, the best environmental protection characteristics and a wide range of fuel adaptability, especially the adaptability to low-quality fuels. It has received more and more attention.
This series of boiler products adopt the new high-efficiency, energy-saving and low-pollution coal-burning technology of external CFB boiler. It has many advantages such as wide fuel adaptability, high combustion efficiency, high efficiency desulfurization, low NOX emission, simple structure, and convenient operation. The boiler combustion efficiency can reach more than 95%, mainly because of its good gas-solid mixing and high combustion rate, followed by the recirculation combustion of fly ash.
Low nitrogen oxide emissions is another very attractive feature of CFB boilers. Operating experience shows that the NOX emission range of this boiler is 50～150ppm or 40～120mg/MJ. Its low NOX emissions are due to the following two reasons: one is low-temperature combustion, at this time nitrogen in the air generally does not generate NOX; the other is staged combustion, which inhibits the conversion of nitrogen in the fuel to NOX, and makes part of the generated NOX NOX is reduced.
The fluidized bed combustion boiler has a large load adjustment range, fast load adjustment, and easy to realize comprehensive utilization of ash and slag. The furnace has a small cross-sectional area, and at the same time, good mixing and expansion of the combustion area greatly reduce the number of coal feed points required. It not only facilitates combustion, but also simplifies the coal feeding system. Zozen Boilers specializes in the production of various types of boilers, and has reached friendly cooperative relations with many users. The products are exported to more than 100 countries and regions. Welcome to consult.