Experimental study of the combustion efficiency and formation of NOx in an industrial pulverized coal combustor

2004 ◽  
Vol 28 (6) ◽  
pp. 511-520 ◽  
Author(s):  
Li ZhengQi ◽  
Yang LongBin ◽  
Qiu PengHua ◽  
Sun Rui ◽  
Chen LiZhe ◽  
...  
Keyword(s):  
Experimental Study ◽  
Combustion Efficiency ◽  
Pulverized Coal

100% Test Burn of Torrefied Wood Pellets at a Full-Scale Pulverized Coal Fired Utility Steam Generator

2018 ◽  
Author(s):  
Rod Hatt ◽  
David A. T. Rodgers ◽  
Randy Curtis
Keyword(s):  
Electrostatic Precipitator ◽  
Combustion Efficiency ◽  
Pulverized Coal ◽  
Powder River Basin ◽  
Wood Production ◽  
Wood Pellets ◽  
Front End ◽  
Combustion Emissions ◽  
And Storage ◽  
Test Fuel

Portland General Electric’s (PGE) Boardman plant is a nominal 600 megawatt (MW) coal fired unit that burns sub-bituminous Powder River Basin (PRB) coal from Wyoming. This paper will cover the experience and results of PGE’s Boardman plant operating on 100% torrefied wood (TW) pellets at 255 MW consuming almost 5000 tons of pellets. Results were positive and include suitable handing after inclement weathering for months. Pulverizers were able to handle the TW pellets with adjustments, resulting in near 100% combustion efficiency. Particulates were controlled with an electrostatic precipitator (ESP). Topics investigated include torrefied wood production, fuel handling and storage on the front end of the test. Fuel handling, pulverization, combustion, emissions, and ESP performance were monitored during the test and are reported here. Several one mill tests were conducted prior to the 100% test to evaluate and improve mill performance. This test showed that a pulverized coal (PC) boiler can operate on 100% TW fuel with minimal operational changes.

scholarly journals Experimental study of the thermochemical treatment of the low-grade coal prior to boiler combustion at coal-fired power station

2019 ◽  
Vol 109 ◽  
pp. 00119
Author(s):  
Volodymyr Yemelianenko ◽  
Vitalii Pertsevyi ◽  
Oleksandr Zhevzhyk ◽  
Iryna Potapchuk ◽  
Oleksandr Lutai
Keyword(s):  
Experimental Study ◽  
Power Plants ◽  
Thermal Power ◽  
Thermochemical Treatment ◽  
Gas Pressure ◽  
Pulverized Coal ◽  
Time Range ◽  
Low Grade ◽  
Boiler Furnace ◽  
Coal Fuel

Analysis of the perspectives of the coal fuel for thermal power plants is carried out. The necessity of the experimental study for temperature measurement in the boiler furnace. The results of the experimental study are presented: temperature change over time at the burner outlet for different constant pressure value of the backlighting gas, dependence of the temperature at the burner outlet from the backlighting gas pressure for constant concentration value of pulverized coal in coal-air mixture, dependence of the temperature at the burner outlet from the concentration of pulverized coal in coal-air mixture for constant value of the backlighting gas pressure, temperature measurements for constant backlighting gas pressure value, constant value of the concentration of pulverized coal in coal-air mixture when plasmatron is switched and operates for some time range. The results of the study could be applied to the solid fuel treatment for different thermal units.

Retrofitting 25T/h Pulverized Coal-Fired Boiler Into 35T/h Circulating Fluidized Bed Boiler for Burning Mixture of Coal and Bagasse

2005 ◽  
Author(s):  
Han-Ping Chen ◽  
Xian-Hua Wang ◽  
Shi-Hong Zhang ◽  
De-Chang Liu ◽  
Yu-Hua Lai ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Combustion Efficiency ◽  
Economic Benefits ◽  
Pulverized Coal ◽  
Industrial Wastes ◽  
Pollutant Emission ◽  
Fluidized Bed Combustion ◽  
Circulating Fluidized Bed Boiler ◽  
Combustion Technology

In China, there are a large number of pulverized coal-fired industrial boilers, whose steam capacities are usually relatively small. These boilers can burn only high-grade coal and have low combustion efficiency. Furthermore, the combustion emissions, such as SO2 and NOx, pollute the environment severely. Therefore it is very important and urgent to adopt economically efficient and environmentally friendly technologies to retrofit these boilers. At the same time, there are many industrial wastes, such as bagasse, wood waste, rubbish, petroleum coke and so on, need burning disposal in China. Fluidized bed combustion technology is a kind of clear combustion technology, which has many advantages, such as excellence fuel flexibility, high combustion efficiency, low pollutant emission and good turndown capability etc. So, adopting fluidized bed combustion technology, retrofitting pulverized coal-fired boiler into fluidized bed boiler can realize pure burning various wastes or co-firing with coal, which should have great economic benefits and social benefits. And the application prospect of the method is also extensive. The State Key Laboratory of Coal Combustion has successfully retrofitted a 25t/h pulverized coal-fired boiler into circulating fluidized bed boiler with in-bed tubes and downward exhaust cyclone. The retrofitted boiler can burn mixture of coal and bagasse and the steam capacity reaches 35t/h. This paper presents the retrofitting measures and the operation status of the boiler after retrofitting.

scholarly journals Convergent-Divergent Injection Lance for the Enhancement of Combustion Efficiency of Pulverized Coal at Blast Furnace

2016 ◽  
Vol 56 (5) ◽  
pp. 770-776 ◽  
Author(s):  
Ryota Murai ◽  
Yusuke Kashihara ◽  
Akinori Murao ◽  
Michitaka Sato
Keyword(s):  
Blast Furnace ◽  
Combustion Efficiency ◽  
Pulverized Coal

Experimental study on the efficiency of pulverized coal-fired steam boiler

2016 ◽  
Author(s):  
Nikola Tanasic ◽  
Goran Jankes ◽  
Mirjana Stamenic ◽  
Marta Trninic ◽  
Tomislav Simonovic ◽  
...  
Keyword(s):  
Experimental Study ◽  
Pulverized Coal ◽  
Steam Boiler

Experimental study on NO formation and burnout characteristics of pulverized coal in oxygen enriched and deep-staging combustion

Fuel ◽  
2020 ◽  
Vol 272 ◽  
pp. 117639
Author(s):  
Tao Zhu ◽  
Yueyi Hu ◽  
Chunli Tang ◽  
Limin Wang ◽  
Xuan Liu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Pulverized Coal ◽  
No Formation

Experimental study of the flame propagation characteristics of pulverized coal in an O2/CO2 atmosphere

Fuel ◽  
2020 ◽  
Vol 262 ◽  
pp. 116678 ◽  
Author(s):  
Yijun Zhao ◽  
Wenda Zhang ◽  
Dongdong Feng ◽  
Pengxiang Wang ◽  
Shaozeng Sun ◽  
...  
Keyword(s):  
Experimental Study ◽  
Flame Propagation ◽  
Pulverized Coal ◽  
Propagation Characteristics ◽  
Co2 Atmosphere
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