scholarly journals Optimization of NOx emission control based on high sulfur coal combustion

2021 ◽  
Vol 256 ◽  
pp. 02015
Author(s):  
Shuai Guo ◽  
Mingliang Zhao ◽  
Tingting Li ◽  
Zhiyu Song ◽  
Jiting han
Keyword(s):  
Wind Speed ◽  
Flow Field ◽  
Coal Combustion ◽  
Emission Reduction ◽  
Nox Emission ◽  
Test Results ◽  
Expected Effect ◽  
Injection Quantity ◽  
Adjustment Test ◽  
Ammonia Injection

Combined with the operation of an 800MW supercritical boiler burning high sulfur coal, in order to control the emission of nitrogen oxides, the optimization adjustment of ammonia injection and NOx emission reduction based on combustion adjustment is proposed. According to the test of the inlet and outlet of denitration system under 800 MW condition, the parameters of NOx, O2, NH3, wind speed and so on at the inlet and outlet of denitration system are tested, and the ammonia injection manual valve is adjusted according to the test results. After adjustment, the NOx distribution at the outlet of denitration system is uniform, and the ammonia injection quantity is reduced. After adjustment, the flow field under 800 MW and 500 MW conditions is tested, and the flow field distribution under the two conditions is uniform. The adjustment test has achieved the expected effect.

An Experimental Investigation of NOx Emission Reduction From Automotive Engine Using the Miller Cycle

2004 ◽  
Author(s):  
Yaodong Wang ◽  
Tom Ruxton
Keyword(s):  
Experimental Investigation ◽  
Nitrogen Oxides ◽  
Emission Reduction ◽  
Nox Emission ◽  
Petrol Engine ◽  
Miller Cycle ◽  
Test Results ◽  
Test Rig ◽  
Automotive Engine

An experimental investigation of NOx emission reduction from automotive (petrol) engine using the Miller Cycle was carried out. Two versions of Miller Cycle were designed and realized on a petrol engine. The tests were carried out on the test rig. The test results showed that applying Miller Cycle could reduce the emission of nitrogen oxides from petrol engine.

scholarly journals D309 LOW NOX EMISSION WITH AMMONIA INJECTION DURING COAL COMBUSTION

2003 ◽  
Vol 2003.3 (0) ◽  
pp. _3-273_-_3-277_
Author(s):  
Zhihua Wang ◽  
Junhu Zhou ◽  
hao Zhou ◽  
Xinyu Cao ◽  
Xiang Zhao ◽  
...  
Keyword(s):  
Coal Combustion ◽  
Nox Emission ◽  
Low Nox Emission ◽  
Ammonia Injection

scholarly journals Simulation of Thermal Effects on the Flow Field in a Pilot-Scale Kiln

2021 ◽  
Author(s):  
I. A. Sofia Larsson ◽  
Anna-Lena Ljung ◽  
B. Daniel Marjavaara
Keyword(s):  
Flow Field ◽  
Coal Combustion ◽  
Thermal Effects ◽  
Iron Ore ◽  
Combustion Process ◽  
Pilot Scale ◽  
Mixing Properties ◽  
Process Gas ◽  
Mixing Rates ◽  
Computational Fluid Dynamics Cfd

AbstractThe flow field and coal combustion process in a pilot-scale iron ore pelletizing kiln is simulated using a computational fluid dynamics (CFD) model. The objective of the work is to investigate how the thermal effects from the flame affect the flow field. As expected, the combustion process with the resulting temperature rise and volume expansion leads to an increase of the velocity in the kiln. Apart from that, the overall flow field looks similar regardless of whether combustion is present or not. The flow field though affects the combustion process by controlling the mixing rates of fuel and air, governing the flame propagation. This shows the importance of correctly predicting the flow field in this type of kiln, with a large amount of process gas circulating, in order to optimize the combustion process. The results also justify the use of down-scaled, geometrically similar, water models to investigate kiln aerodynamics in general and mixing properties in particular. Even if the heat release from the flame is neglected, valuable conclusions regarding the flow field can still be drawn.

Numerical Investigation of Thermal Flow Field of Air-Cooled Condensers for Yongshou Plant

2012 ◽  
Vol 248 ◽  
pp. 391-394
Author(s):  
Wen Zhou Yan ◽  
Wan Li Zhao ◽  
Qiu Yan Li
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Wind Speed ◽  
Power Plant ◽  
Flow Field ◽  
Wind Direction ◽  
Rotational Speed ◽  
Power Plants ◽  
Thermal Flow ◽  
Air Cooled Condensers

By using the computational fluid dynamics code, FLUENT, Numerically simulation is investigated for Youngshou power plant. Under the constant ambient temperature, the effects of different wind speed and wind direction on the thermal flow field are qualitatively considered. It was found that when considering about the existing and normally operating power plants, the thermal flow field is more sensitive to wind direction and wind speed. Based on the above results, three improved measures such as: increasing the wind-wall height and accelerating the rotational speed of the fans near the edge of the ACC platform and lengthen or widen the platform are developed to effectively improving the thermal flow field, and enhanced the heat dispersal of ACC.

Mechanism of Soot and NOx Emission Reduction Using Multiple-injection in a Diesel Engine

1996 ◽  
Author(s):  
Zhiyu Han ◽  
All Uludogan ◽  
Gregory J. Hampson ◽  
Rolf D. Reitz
Keyword(s):  
Diesel Engine ◽  
Emission Reduction ◽  
Nox Emission ◽  
Multiple Injection

scholarly journals CORROSION BEHAVIOUR OF ALUMINIUM 6061 NICKEL COATED CENOSPHERE COMPOSITE

2020 ◽  
Vol 15 (3) ◽  
Author(s):  
Arvind R S ◽  
Prasanna Ram M ◽  
Prashanth T ◽  
Jaimon Dennis Quadros
Keyword(s):  
Coal Combustion ◽  
Metal Matrix ◽  
Power Plants ◽  
Corrosion Behaviour ◽  
Thermal Power ◽  
Stir Casting ◽  
Matrix Composites ◽  
Test Results ◽  
Immersion Corrosion ◽  
Aluminium Metal

Cenosphere fly ash is one of the most inexpensive and low-density material which is abundantly available as a solid waste by-product of coal combustion in thermal power plants. Aluminium metal matrix composites with Nickel coated cenospheres as the reinforcement is prepared by stir casting route. The composites are prepared with varying percentages of cenospheres in the percentage of 2-10% by weight of the composite. Immersion corrosion tests are conducted on the composites in three different medium and for three different time durations. It is evident from the test results as well as the microstructure images that the weight loss of samples with 8% Nickel coated cenospheres has shown least corrosion or the highest corrosion resistance when compared to the counterparts.

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