The Combusting Properties of Anthracite in a 410 t/h CFB Boiler

2004 ◽  
Vol 126 (3) ◽  
pp. 226-230 ◽  
Author(s):  
Xiaofeng Lu ◽  
Ryo S. Amano
Keyword(s):  
Fly Ash ◽  
Carbon Content ◽  
Cfb Boiler ◽  
Low Load ◽  
Boiler Operation ◽  
Operation Test

According to the results of an optimized operation test carried out on a 410 t/h CFB boiler, the measured combusting properties of anthracite in the large CFB boiler are provided in this paper. These properties include: operating and designing parameters affected on the carbon content in fly ash, distribution of oxygen in the furnace, distribution of temperature in the furnace, distribution of bed pressure, and operation under low load. Some methods used to improve the CFB boiler operation are discussed in the paper.

Study on the Optimal Running Temperature of Circulating Fluidized Bed Boiler Burning Fujian Anthracite

2013 ◽  
Vol 732-733 ◽  
pp. 291-296
Author(s):  
Hong Zhou He ◽  
Huang Huang Zhuang
Keyword(s):  
Fly Ash ◽  
Carbon Content ◽  
Circulating Fluidized Bed ◽  
Cfb Boiler ◽  
Industrial Experiments ◽  
Boiler Efficiency ◽  
Efficient Combustion ◽  
Desulfurization Efficiency ◽  
Burnout Rate ◽  
Very High

There is a contradiction in selecting the running temperature for CFB boilers burning Fujian anthracite, in order to simultaneously satisfy the requirement of efficient combustion and high desulfurization efficiency. Based on numerical simulation and industrial experiments, the effect of the running temperature on the carbon content in fly ash and the desulfurization efficiency were analyzed for two types of CFB boilers with different capacities. It is found that, with the rise of running temperature, both decrease quasi-linearly. For the 75 t/h CFB boiler, when the running temperature is lower than 950 °C, the carbon content in fly ash is very high, causing a low burnout efficiency; maintaining the running temperature at 1000 °C is favorable for the fine char to be burned out, however, continuous raise becomes almost useless. For 440 t/h CFB boiler, a higher burnout rate of the fine char particles can be obtained when the running temperature is kept at about 950 °C, and further increase brings no evident benefit either. For the 75 t/h and 440 t/h CFB boilers burning Fujian anthracite, considering both the boiler efficiency and the combustion desulfurization efficiency, the optimal running temperature should be respectively about 980 °C and 950 °C.

Emission Characteristic of NOx in CFB Boiler at Low Load

2021 ◽  
pp. 489-498
Author(s):  
Lujian Chen ◽  
Xin Tao ◽  
Shouyu Zhang ◽  
Hairui Yang ◽  
Junfu Lyu
Keyword(s):  
Emission Characteristic ◽  
Cfb Boiler ◽  
Low Load

The role of pulverized coal drying temperature in fly ash carbon content and slagging of a tangentially coal-fired boiler

Fuel ◽  
2019 ◽  
Vol 257 ◽  
pp. 115951 ◽  
Author(s):  
Xin Liao ◽  
Qi Zhang ◽  
Wenhu Yang ◽  
Zhongzhu Qiu ◽  
Ruitang Guo ◽  
...  
Keyword(s):  
Fly Ash ◽  
Carbon Content ◽  
Pulverized Coal ◽  
Drying Temperature ◽  
Coal Drying

Properties of Particles in the Fly Ash of a Biofuel-Fired Circulating Fluidized Bed (CFB) Boiler

2008 ◽  
Vol 22 (5) ◽  
pp. 3005-3015 ◽  
Author(s):  
Linda S. Johansson ◽  
Bo Leckner ◽  
Claes Tullin ◽  
Lars-Erik Åmand ◽  
Kent Davidsson
Keyword(s):  
Fly Ash ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Cfb Boiler

The impact of fly ash resistivity and carbon content on electrostatic precipitator performance

Fuel ◽  
2007 ◽  
Vol 86 (16) ◽  
pp. 2521-2527 ◽  
Author(s):  
Richelieu Barranco ◽  
Mei Gong ◽  
Alan Thompson ◽  
Michael Cloke ◽  
Svenja Hanson ◽  
...  
Keyword(s):  
Fly Ash ◽  
Carbon Content ◽  
Electrostatic Precipitator ◽  
The Impact

Preparation of β-Sialon from Fly Ash by Carbothermal Reduction-Nitridation Reaction

2008 ◽  
Vol 368-372 ◽  
pp. 910-912 ◽  
Author(s):  
Jun Tong Huang ◽  
Ming Hao Fang ◽  
Yan Gai Liu ◽  
Zhao Hui Huang
Keyword(s):  
Fly Ash ◽  
Carbon Black ◽  
Carbon Content ◽  
Carbothermal Reduction ◽  
Single Phase ◽  
Raw Materials ◽  
Synthesis Mechanism ◽  
Nitridation Reaction

Single phase Sialon was synthesized successfully from fly ash by carbothermal reductionnitridation reaction in this paper. The effects of synthesizing temperature (1200°C, 1300°C, 1400°C and 1450°C) and carbon content (stoichiometric content, exceeding 10%, 50% and 100%) on the final production were studied by XRD and SEM. Synthesis mechanism of β-Sialon was also analysized. The results indicated that single phase β-Sialon with z=3 was obtained using fly ash as raw materials and carbon black of stoichiometric content as reducer by carbothermal reduction- nitridation reaction in flow nitrogen at 1450°C for 3h. Temperature and content of carbon had significant effect on the synthesis of β-Sialon.

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