For new industrial development, a new 75 MW power generation facility has been p
ID: 298659 • Letter: F
Question
For new industrial development, a new 75 MW power generation facility has been proposed in Northwestern Washington East of Anacortes. This facility would burn natural gas and produce energy efficiency of 35%. The boiler would be tangentially fired with flue gas recirculation for emission control. The effective stack height of the facility will be 50 m. Wind speeds on poor air quality days are typically 1 m/s (measured at 10m). In the area, the criteria pollutants of interest are NO_2, CO, and SO_2. Maximum local concentrations of each of these pollutants have been measured at 20 ppb, 1 ppm, and 10 ppb respectively. The community is also concerned about emissions of toluene, so you should determine whether toluene emissions will trigger new source review. The plant is proposed to be situated on a 1 km times 1 km lot. Your job is to perform an initial PSD review to determine the impacts of the new plant on air quality and determine whether it will cause significant deterioration of air quality. Determine the emission rates of CO, NO_2, SO_2, and toluene. You may use the document provided with emission factors for power generation, or find your own source if you wish (make sure to cite!) Determine yearly emissions and state whether New Source Review is triggered for each pollutant. Model downwind concentrations of each pollutant that has triggered new source review for stable, natural and unstable conditions and plot the downwind concentrations. Determine if downwind concentrations beyond the fence line of your facility have been severely impacted by your facility (will NAAQS be violated?, will we be close to violating?) Make recommendations on whether the plant should be built as is, with additional considerations, or not at all For example you may suggest that the owners buy more property if the maximum downwind concentration that causes NAAQS violation is close to the facility, or that additional emission controls be installed, or suggest raising the stack height. If you make recommendations, be specific about the amount of property that must be bought or the effectiveness of emission controls that should be installed, or other solutions.Explanation / Answer
Answer:
Toluene: It is naturally can form as the by product during formation of gasoline, and also during when coke converts into coal. Therefore, it can be trigger the given situation as it is toxic too because the presence of toluene in environment causes health issues such as confusion, weakness, nausea, memory loss, hearing and color vision loss etc.
As the plant produces number of toxic elements via by product therefore, it also causes number of harmful affects over the population of region. Because, accordingly the rate of toxic elemental concentration increase and adversely affect on the environment as well as air quality. Due to which there would be health issues related to air such problem in breathing, lung infection, irritation in eyes etc.
The rate of emission can be calculated by the following formula;
Emission = Ef *H
Where, Ef= Emission factor, H= boiler higher heating value per hour
To avoid this future hazard, the company should install more effluent controllers and keep a close watch over the rate of emission to control excess toxic waste.
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