Anthracite fired power plant for CFB boiler
ZG CFB boilers for an anthracite-fired power plant. As the first demonstration unit in China manufacturer with ZG supplier since 1945, it produces clean, cost-effective power.
Anthracite fired power plant for CFB boiler design:
The CFB boilers will replace typical pulverized coal (PC) units that are outdated and worn out. Combustion of high-ash anthracite in the CFB boilers is inefficient, requires considerable co-firing of natural gas and produces high SOx and NOx emissions. The important boiler design and performance parameters, such as furnace height, fuel and limestone sizing, solids recirculation rate, combustion efficiency and emissions performance, were developed using the results of high-ash anthracite pilot CFB testing.
Anthracite fired CFB boiler cell without changes to the building. The novel boiler arrangement with a dual furnace outlet provides for a low-risk scale-up. The boiler will operate in the 50% to 100% load range without using supplemental fuel. The expected boiler combustion and emissions performance data are provided. Introduction High-ash anthracite is a primary fuel for coal-fired boilers. CFB power plant boilers were designed to burn the anthracite size fraction of minus 6 mm (about 1/ 4 in.), called anthracite schtib, with an ash content of 15-20%.
CFB Boiler Technology ZG design employs a distinctive two-stage solids separation system. A secondary separator (multi-cyclone type) is installed in the lower gas temperature region of approximately 500 to 700F (260 to 371C) of the convection pass. Solids from the multicyclone are recycled to the furnace. The two-stage solids separation system provides overall collection efficiency exceeding that of cyclone-type CFBs. The final particulate cleanup uses a baghouse or electrostatic precipitator .The development of ZG CFB technology, its advantages and successful operating experience have been previously described. It culminated in the patented third generation internal recirculation CFB boiler (IR-CFB) featuring a primary separator with entirely internal solids recirculation and control of the solids inventory in the furnace via controlled solids recirculation from the secondary separator.
There are eight bed ash drains, consisting of vertical pipes which extend through the furnace floor. The bed material is cooled in water-cooled screws located under the furnace windbox at each drain. The solids drain flow rate is controlled by the rotational speed of water cooled screws. While fluidized bed ash drain coolers have been specified for a number of boilers having high ash, water cooled screws were selected for this project. The choice between a fluidized bed ash cooler and screw cooler was carefully examined. The advantage of a fluidized bed ash cooler in utilizing the sensible heat in the bottom ash is offset by several disadvantages: a) in the case of anthracite schtib firing, there is a possibility of temperature excursions in the cooler due to carbon burnout leading to agglomerate formation, and b) a considerable amount of cooling air/flue gas is needed which can affect boiler performance. With multiple screw coolers, there is redundancy allowing for repairs to be made with the boiler on-line with little or no reduction of boiler capacity. Secondary separator recycle. The solids collected in the multi-cyclone are recycled to the furnace side wall injection nozzles at the required rate using air-assisted conveyors. One air-assisted conveyor serves two multi-cyclone hoppers. The flow rate to each conveyor is controlled by a variable speed feeder installed between the hopper discharge connection and the conveyor inlet. Control algorithms determine the aggregate quantity of solids to be recycled to meet furnace performance requirements and the flow rate from each hopper required to accommodate non-uniform distribution of solids from hopper to hopper. Excess solids are removed from the system when required by means of overflow pipes in each hopper. Solids from the overflow pipes are sent to disposal via the plant ash removal system.
More and more industry using anthracite schtib with CFB technology. CFB testing of anthracite schtib has demonstrated its efficient combustion and low emission performance and provided data for designing of commercial-size units. The anthracite fired power plant for CFB boiler design developed by ZG has advantages of compactness, simplicity of construction and low scale-up risk. Boiler auxiliary equipment is designed to achieve high plant availability. The expected boiler performance meets stringent efficiency and emission control requirements.
Circulating fluidised bed Boiler Cases
ZG Boiler Workshop
Why choose ZG Boiler as Anthracite fired power plant for CFB boiler 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 Anthracite fired power plant for CFB boiler ?
Our Anthracite fired power plant for CFB boiler 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),
Eastern Asia(Mongolia / Russia / North Korea / South Korea / Japan),
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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Southeast Asia(Vietnam, Laos, Cambodia, Thailand, Myanmar, Malaysia, Singapore, Indonesia, Brunei, the Philippines, East Timor)