Operational Experience and Design Consideration of a Large Scale Anthracite Fired CFB Boiler in China

2003 ◽  
Author(s):  
Xiaofeng Lu ◽  
Dajun Wang ◽  
Qinghua Chen ◽  
Ryo S. Amano
Keyword(s):  
Power Plant ◽  
Large Scale ◽  
Rapid Development ◽  
Pulverized Coal ◽  
Low Rank ◽  
Operational Experience ◽  
Design Consideration ◽  
Thermal Tests ◽  
Cfb Boiler ◽  
Technical Requirements

Since the first 410t/h CFB boiler was built and put into business operation in 1996, CFB boiler has gotten a rapid development in China because of low emission and good availability for low rank coal. The CFB boiler technology has been selected to build a 300MW coal-fired boiler and to replace many pulverized coal-fired boilers with a capacity range from 220t/h to 410t/h in China. Most of these CFB boilers burn local low rank coals. To investigate the combustion characteristics of anthracite and optimize the operation of CFB boilers, a series of thermal tests were done on a 220t/h CFB boiler, in AIXI power plant, and on a 410t/h CFB boiler (the largest CFB boiler in China), in GAOBA power plant. The coal burned in these two CFB boilers came from the same coal mine. The properties of the boilers include: operating and designing parameters affected by the carbon content in the fly ash, the distribution of oxygen and temperature in the furnace, a limestone milling and transfer system, and operation under a lower load. All tests were aimed at how to optimize the operation of CFB boilers when anthracite is burned. Based on these test results, the technical requirements for a 300MW CFB boiler were investigated and are presented in this paper. The contents of the investigation included design considerations and ash utilization. An investigation on converting a pulverized coal-fired (PC) boiler to a CFB boiler is also presented in this paper. The content of the investigation includes basic design consideration of the conversion, and utilization of the milling system from an old PC boiler.

Combustion possibility of low rank Russian peat as a blended fuel of pulverized coal fired power plant

2014 ◽  
Vol 20 (4) ◽  
pp. 1752-1760 ◽  
Author(s):  
Jae Kwan Kim ◽  
Hyun Dong Lee ◽  
Hyoung Suk Kim ◽  
Ho Young Park ◽  
Sung Chul Kim
Keyword(s):  
Power Plant ◽  
Pulverized Coal ◽  
Low Rank ◽  
Blended Fuel

scholarly journals Relationship between Particle Size Distribution of Low-Rank Pulverized Coal and Power Plant Performance

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Rajive Ganguli ◽  
Sukumar Bandopadhyay
Keyword(s):  
Particle Size ◽  
Power Plant ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Power Plants ◽  
Pulverized Coal ◽  
Plant Performance ◽  
Low Rank ◽  
Volatile Content ◽  
The Impact

The impact of particle size distribution (PSD) of pulverized, low rank high volatile content Alaska coal on combustion related power plant performance was studied in a series of field scale tests. Performance was gauged through efficiency (ratio of megawatt generated to energy consumed as coal), emissions (SO2,NOx, CO), and carbon content of ash (fly ash and bottom ash). The study revealed that the tested coal could be burned at a grind as coarse as 50% passing 76 microns, with no deleterious impact on power generation and emissions. The PSD’s tested in this study were in the range of 41 to 81 percent passing 76 microns. There was negligible correlation between PSD and the followings factors: efficiency, SO2,NOx, and CO. Additionally, two tests where stack mercury (Hg) data was collected, did not demonstrate any real difference in Hg emissions with PSD. The results from the field tests positively impacts pulverized coal power plants that burn low rank high volatile content coals (such as Powder River Basin coal). These plants can potentially reduce in-plant load by grinding the coal less (without impacting plant performance on emissions and efficiency) and thereby, increasing their marketability.

Ukraine’s First Large-Scale CFB 200 MWe Anthracite Fired Starobeshevo Power Plant

2005 ◽  
Author(s):  
Victor A. Shevtchenko ◽  
Werner Franke ◽  
Peter Gummel ◽  
Marian Kotrus ◽  
George von Wedel
Keyword(s):  
Power Plant ◽  
Steam Turbine ◽  
Power Plants ◽  
Large Scale ◽  
State Of The Art ◽  
Design Issues ◽  
Cfb Boiler ◽  
Commercial Operation ◽  
European Regulations ◽  
Temperature And Pressure

JSC Donbassenergo, a major utility in the Ukraine, is operating power plants of approx. 3500 MW, mostly operated with their local fuel anthracite. As the existing facilities are reaching their age a strategy has been developed to apply state-of-the-art technology for revamping. On this basis the decision has been taken to replace boiler No. 4 of the Starobeshevo Power Plant with a boiler based on CFB technology. The unit is designed for 670 t/h of superheated and 538 t/h of reheated steam with 545 / 543 °C and 13.2 / 2.5 MPa temperature and pressure to account for the existing steam turbine which generates 200 MW electricity. Fuels used are a local anthracite and anthracite sludge left from coal washing and which is available in large quantities. Emissions are designed in accordance with European regulations allowing 200 mg/m3 (STP) for NOX and 200 mg/m3 (STP) for SO2. A basic description of the overall plant will be given. Details on the design of the CFB boiler which is equipped with Lurgi’s patented pant-leg and other design issues will be explained. Operating results from the commissioning and first commercial operation will be presented.

The First Operational Experience of World’s Largest Biofuel Fired CFB

2003 ◽  
Author(s):  
Ari Kokko ◽  
Stig Nickull
Keyword(s):  
Power Plant ◽  
High Reliability ◽  
Paper Mill ◽  
Pulp And Paper ◽  
Electricity Production ◽  
Peat Bogs ◽  
Operational Experience ◽  
Pulp And Paper Mill ◽  
Cfb Boiler ◽  
Important Design

Oy Alholmens Kraft Ab, with its unique combination of owners, was founded for the purpose of building a power station at Pietarsaari on the west coast of Finland. The power utility companies initiated the co-operation with the saw-, pulp and paper mill owners with the goal of finding a solution which maximized biomass utilization through co-firing with other fuels, to produce steam and heat in a utility sized power plant. Concept development resulted in a 240 MWe circulating fluidized bed unit with a flexible and demanding combination of fuels. The Alholmens Kraft power plant supplies process steam to the nearby UPM-Kymmene paper mill, and for district heating in Pietarsaari. The plant produces electricity for the power company owners in Finland and in Sweden. The CFB boiler steam capacity is 550 MWth (1875 MMBtu/hr), giving a maximum electric power of 240 MWe. When commissioned in autumn 2001 the boiler was one of the largest CFB boilers in the world, and the largest biofuel-burning CFB. The Alholmens Kraft CFB boiler is a multi-fuel boiler, whose main fuels are bark, wood residue and peat, with coal as a back-up fuel. Due to its location at the pulp and paper mill, high reliability and low emissions were the most important design criteria for the boiler. Steam production for the mill must be ensured all year-round, apart from during the mill’s short annual service shutdowns. Another important design consideration was the controllability of the boiler due to Nord Pool electricity production requirements. Typical regular load variation is between day and night but sometimes the load change speed requirement is quite high. This paper presents the Alholmens Kraft power plant application, and its very smooth start-up and operational experience during the first year with different fuels and fuel combinations at various load levels. The paper also describes how well the large boiler has performed with regard to the strict emission limits. The selection of design fuel contributes well towards the target for net CO2 reduction, but it also places huge requirements in terms of fuel purchasing and logistics. The volumetric fuel consumption by the boiler at full load is 1000 m3/h (35 000 ft3) of biofuel. More coal, the support and reserve fuel, is used in spring as weather conditions may cause availability problems with peat, before the new peat can be harvested and dried at the peat bogs. Coal is always available at the site. This paper presents the first year’s operational experience of the fuel logistics chain. The successful Alholmens Kraft CFB boiler project is an excellent example of the very wide fuel flexibility that is possible in a CFB unit.

Virtual Synchronous Generator Control of Power System including Large-scale Wind Farm by Cooperative Operation between Battery and LFC Hydro Power Plant

2020 ◽  
Vol 140 (6) ◽  
pp. 531-538
Author(s):  
Kotaro Nagaushi ◽  
Atsushi Umemura ◽  
Rion Takahashi ◽  
Junji Tamura ◽  
Atsushi Sakahara ◽  
...  
Keyword(s):  
Power Plant ◽  
Power System ◽  
Large Scale ◽  
Wind Farm ◽  
Synchronous Generator ◽  
Hydro Power ◽  
Virtual Synchronous Generator

Research and Develop on Static Frequency Converter of Pumped Storage Power Plant

2012 ◽  
Vol 608-609 ◽  
pp. 1120-1126 ◽  
Author(s):  
De Shun Wang ◽  
Bo Yang ◽  
Lian Tao Ji
Keyword(s):  
Power Plant ◽  
Control Strategy ◽  
Large Scale ◽  
Frequency Converter ◽  
Position Estimation ◽  
Position Sensor ◽  
Storage Unit ◽  
Rotor Position ◽  
Start Up ◽  
Pumped Storage

A static frequency converter start-up control strategy for pumped-storage power unit is presented. And rotor position detecting without position sensor is realized according to voltage and magnetism equations of ideal synchronous motor mathematics model. The mechanism and implementation method of initial rotor position determination and rotor position estimation under low frequency without position sensor are expounded and validated by simulations. Based on the mentioned control strategy, first set of a static frequency converter start-up device in China for large-scale pumped-storage unit is developed, which is applied to start-up control test in the 90 MW generator/motor of Panjiakou Pumped-storage Power Plant. Test results show that rotor position detecting, pulse commutation, natural commutation, and unit synchronous procedure control of static start-up are all proved. The outcomes have been applied in running equipment, which proves the feasibility of mentioned method.

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