Coal 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 separation structure & parametric design, and loop seal device. The thermal efficiency of the coal power plant boiler is about 5% higher than the other CFB boilers.
Other Technical Advantages
1. High Thermal Efficiency
A. Integrate furnace, separator and loop seal system by using membrane water wall, compact structure.
B. The water cooling separator skeleton is membrane wall, prevents the low efficiency caused by air leakage.
C. The membrane wall could abort the heat of inner wall, allowing the residual carbon to burn in the separator (do not cause coking).
D. 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.
E. The external temperature of the membrane wall is low, low heat loss.
2. 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.
3. Anti wear design
A. The boiler uses low flow rate design, the area of the furnace is large and the smoke speed is low.
B. The buried pipe adopts anti-wear steel with the special size and angle, and reduce the flidization velocity, to reduce the abrasion.
C. The separator is at the outlet of combustion chamber, the large particles of the flue gas are separated, reduce the abrasion of heating surface.
D. The high temperature resistant material is deposited on the water cooling wall of the separator, avoiding the abrasion of membrane wall.
4. Various kinds of fuels are adaptable.
The boiler can burn 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%.
5. Low failure rate
The failure rate is extremely low, the boiler could run for a long time continually.
6. 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.
High Quality Assurance
1) Zhongding Boiler owns a professional design engineer team, before manufacturing, every boiler design drawing will be approved by boiler and pressure vessel experts of CSBTS ( State Bureau of Quality Technical Supervision ), and then the boiler could be produced only if qualified.
2) To ensure the raw materials quality, all the steel plates are special-used for boiler with the Inspection Certificates. The raw material materials are inspected when entering factory, and only the qualified material could be put in storage and used for production.
3) To ensure the welding quality, there a professional welding team, including more than 30 senior welders. The welding materials are stored under constant temperature and humidity, to ensure the welding material quality.
4) Nondestructive testing will be done to ensure the welding quality, by using x-ray detection, ultrasonic flaw detection, magnetic test, or penetration test, etc.
5) Hydrostatic test will be done to ensure the leakproofness and strength of boiler pressure parts, generally, the testing pressure is 12.5 times of rated working pressure.
6) All the raw materials and boilers are supervised and inspected by the experts of Inspection Institution for Boiler and Pressure Vessel. There are international quality certificates of ISO 9001 and CE, we can also offer the inspection report of SGS, BV, etc., Quality Certificates, Energy audit report, and Energy Efficiency Test Report, etc.
Professional Installation and After-sale Team
1) Professional engineer installation team offer the door to door installation and after sale service. The boilers will operate smoothly and safety, and you will get them without worries.
2) 24 hours hot-line to solve your problems, and offer the professional technical supports and after sale service in time to all over the world.