FBC Boiler and Cogeneration Systems
The traditional grate fuel firing systems have several limitations and hence are techno-economically unviable to meet the challenges of the future. Rice husk FBC has emerged as a viable alternative as it has significant advantages over conventional firing system.
FBC offers multiple benefits, such as: compact boiler design, flexibility with fuel used, higher combustion efficiency and reduced emissions of noxious pollutants such as SOx and NOx. The fuels burnt in these boilers include coal, washery rejects, rice husk, bagasse and other agricultural wastes. The fluidized bed boilers have a wide capacity range- 0.5 T/hr to over 100 T/hr.
Fluidized Bed Combustion Mechanism
At higher velocities, bubbles disappear, and particles are blown out of the bed. Therefore, some amounts of particles have to be re-circulated to maintain a stable system and is called as “circulating fluidized bed".
Fluidization depends largely on the particle size and the air velocity. The mean solids velocity increases at a slower rate than does the gas velocity. The difference between the mean solid velocity and mean gas velocity is called as slip velocity. Maximum slip velocity between the solids and the gas is desirable for good heat transfer and intimate contact. If sand particles in fluidized state are heated to the ignition temperatures of fuel (rice husk, coal or bagasse), and fuel is injected continuously into the bed, the fuel will burn rapidly and the bed attains a uniform temperature.
The fluidized bed combustion (FBC) takes place at about 840°C to 950°C. Since this temperature is much below the ash fusion temperature, melting of ash and associated problems are avoided. The lower combustion temperature is achieved because of high coefficient of heat transfer due to rapid mixing in the fluidized bed and effective extraction of heat from the bed through in-bed heat transfer tubes and walls of the bed. The gas velocity is maintained between minimum fluidization velocity and particle entertainment velocity. This ensures a stable operation of the bed and avoids particle entertainment in the gas stream.
Fluidized Bed Combustion Boilers Types
There are three basic types of fluidized bed combustion boilers:
1.Atmospheric Fluidized Bed Combustion System (AFBC)
2.Atmospheric circulating (fast) Fluidized Bed Combustion system (CFBC)
3.Pressurized Fluidized Bed Combustion System (PFBC).
Cogeneration (Combined Heat & Power)
Cogeneration or Combined Heat and Power (CHP) is defined as the sequential generationof two different forms of useful energy - typically mechanical energy and thermal energy from a single primary energy source.
Mechanical energy may be used to drive an alternator for producing electricity, or rotating equipment such as motor, compressor, pump or fan for delivering various services. Thermal energy can be used either for direct process applications or for indirectly producing steam,hot water, hot air for dryer or chilled water for process cooling.
Cogeneration provides a wide range of technologies for application in various domains of economic activities. The overall efficiency of energy use in cogeneration mode can be up to 85 per cent - and even above in some cases. Along with the saving of fossil fuels, cogeneration also helps reducing the emissions of greenhouse gases (particularly CO2 emission).
Circulating fluidised bed Boiler Cases
ZG Boiler Workshop
Why choose ZG Boiler as FBC Boiler and Cogeneration Systems manufacturer
We have over 70 years' experience of boiler and autoclave, and we have a professional installation and after-sales staff for products.Take advantage of the most economical way to improve efficiency and operating flexibility, Get substantial savings on your fuel costs,Reduce all emissions for each K/W of electricity generated, including CO2.
How about the quality of FBC Boiler and Cogeneration Systems ?
Our FBC Boiler and Cogeneration Systems manufactured strictly according to national and international standard. our products have approved ASME, IBR, ISO9001-2008, etc
All our company's products are 100% factory inspected to ensure the high quality.
We provide one year quality warranty service, please rest assured purchase.
Basic Information of CFB Boiler manufacturer--- ZG Boiler
Number of Employees:above 1500 People
Our products:industrial horizontal steam boiler and hot water boiler(biomass boiler, gas boiler, oil boiler, coal boiler, etc), CFB boiler, power plant boiler, waste heating recovery boiler, Pressure Vessel(AAC autoclave, Curing tank,etc )
Factory Size (Sq.meters):400,000 square meters
Factory Location:Factory 1: Zhengzhou,,Henan, China. Factory 2: Xingyang,Henan,China
Number of R&D Staff:376 people
Our Trade & Market
Total Annual Sales Volume:US$100 Million
Main Market:South America(Colombia, Venezuela, Guyana, Suriname, Ecuador, Peru, Brazil, Bolivia, Chile, Paraguay, Uruguay, Argentina and French Guiana),
North America(Bahamas, Canada, Costa Rica, Cuba, El Salvador, Guatemala, Honduras, Haiti, Jamaica, Mexico, Nicaragua, Panama),
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Oceania(Australia, New Zealand, Fiji),
Mid East(Bahrain, Egypt, Iran, Iraq, Israel, Jordan, Kuwait, Lebanon, Oman, Qatar, Saudi Arabia, Syria, UAE and Yemen, Palestine, Algeria, Libya, Morocco, Tunisia and Sudan, Mauritania and Somalia),
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