Double Cyclone CFB Boiler
From CFB Boiler
Zhongding biomass fired double cyclone circulating fluidized bed boiler with low speed is a new generation CFB boiler, it is the national patent product of Zhongding Boiler. Circulating fluidized bed boiler is consisting of combustion chamber, separator, fly ash circulating system, superheater, convection bank, economizer, and air preheater. The boiler inherits the original technology advantages, at the same time, makes big breakthrough on the technology of cyclone fluidized combustion, cyclone separator, and loop seal device. The thermal efficiency of biomass power plant boiler is about 5% higher than the other CFB boilers.
Advantages
High Thermal Efficiency
- Integrate furnace, separator and loop seal system by using membrane water wall, compact structure.
- The water cooling separator skeleton is membrane wall, prevents the low efficiency caused by air leakage.
- The membrane wall could abort the heat of inner wall, allowing the residual carbon to burn in the separator (do not cause coking).
- The wear resistance material of the separator liner is only 80 mm, low thermal inertia, quick start up and shut down, and achieve safe operation.
- The external temperature of the membrane wall is low, low heat loss.
Advanced loop seal device
The loop seal device is composed of two membrane water walls, and the heat of fly ash could absorbed by the water wall tubes.
Anti wear design
- The boiler uses low flow rate design, the area of the furnace is large and the smoke speed is low.
- The buried pipe adopts anti-wear steel with the special size and angle, and reduce the flidization velocity, to reduce the abrasion.
- The separator is at the outlet of combustion chamber, the large particles of the flue gas are separated, reduce the abrasion of heating surface.
- The high temperature resistant material is deposited on the water cooling wall of the separator, avoiding the abrasion of membrane wall.
Various kinds of biomass fuels are adaptable.
The boiler could burn different coal and biomass fuels. The coal could be anthracite, bituminous and brown coal, lean coal, and combustible with coal gangue, gasifier slag, chain slag and other low-grade fuel, also, the slag can be used comprehensively, and the carbon content of the slag is generally below 2%. The biomass fuel could be wood, bagasse, paper products, bamboo, cotton shell, peanut shell, straw, sawdust, coconut shell, etc.
Low failure rate
The failure rate is extremely low, the boiler could run for a long time continually.
Environment Protection
The product uses low-temperature combustion technology, reduce the generation of noxious gas, also, the limestone can be added to the furnace for desulfuration, could meet the requirement of environmental protection.
Tecnical Data
- Rated Capacity : 25-130 t/h
- Pressure : 3.82Mpa-5.29Mpa
- Application : Thermal power plant
- Certificate : ISO 9001, CE, BV, SGS, ASME
- Fuel : different coals and biomass fuels
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