In order to integrate renewable electricity into the power grid, it is crucial for coal-fired plant boilers operate stably across a wide load range. Achieving steady combustion with low nitrogen oxide (NOx) emissions poses significant challenge burning low-volatile coal in plants. This study focuses on developing decoupling technology operating at loads. A three-dimensional numerical simulation...

Fire experiments were conducted in the Safety Research Coal Mine (SRCM) at the National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, with coal, diesel-fuel, electricalcable, conveyor-belt, and metal-cutting fire sources to determine the response of fire sensors to productsof-combustion (POC). Metal oxide semiconductor (MOS) and smoke fire sensors demonstrated an...

The combustion characteristics of pulverized coal when using blast furnace slag charged with iron ore containing rare earth elements as a composite catalyst were investigated by thermo gravimetric analysis. The results show that the combustion char acteristics of pulverized coal loaded with 21.3% by weight of blast furnace slag containing 15% rare earth ore are better than those of others. It i...

A 1997 study in Minnesota indicated a relationship between mercury deposition trends and regional coal combustion (as well as other possible sources) spanning a period of two centuries (Engstrom and Swain 1997). Sediment core sampling from rural lakes in eastern Minnesota indicated a growth in mercury deposited from the air since the first half of the 1800s, with the amount peaking in the 1960s...

Due to the extensive amount of data suggesting the hazards of these compounds, 16 polycyclic aromatic hydrocarbons (PAHs) are on the Environmental Protection Agency (EPA) Priority Pollutant List. Emissions of these PAHs in the flue gas from the combustion of four coals were measured during four 1000h combustion runs using the 0.1MW heat-input (MWth) bench-scale fluidized bed combustor (FBC). An...

Since the first record of a colliery explosion in Belgium, nearly 300 years ago, significant improvements have been achieved in the prevention of explosions in mines. However, based on the past surface TBM project safety statistics, gas explosion hazards are not unique to coal mines but also occur in TBM projects with 48 explosion fatalities recorded worldwide calling for continued diligence an...

In this paper computational analysis of pressure and velocity in coal combustion system using the fluent software is analysed. The combustion of coal is used in circulating fluidized bed combustion system. This work is concerned about gas–solid two-phase mixtures flowing upwards through the fast beds. The type of information resulting from various ways of analyzing the pressure variations and t...

This paper reviewed models embedded in coal combustion simulation, and simulation of 200MW TFB (tangentially-fired boiler) is illustrated later. Comprehensive simulation of combustion will be a bridge between physical theory and practical engineering problems.

The end-Permian extinction decimated up to 95% of carbonate shell-bearing marine species and 80% of land animals. Isotopic excursions, dissolution of shallow marine carbonates, and the demise of carbonate shell-bearing organisms suggest global warming and ocean acidification. The temporal association of the extinction with the Siberia flood basalts at approximately 250 Ma is well known, and rec...