Modelling for Air Quality Estimation for a Planned Coal Washery to Control Air Pollution
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Modelling for Air Quality Estimation for a Planned Coal Washery to Control Air Pollution S. K. Chaulya 1 & A. K. Singh & T. B. Singh & G. C. Mondal & S. Singh & S. K. Singh & R. S. Singh Received: 12 March 2020 / Accepted: 8 June 2020 # Springer Nature Switzerland AG 2020
Abstract Tasra coal washery has been planned in Tasra block which is located in Jharia coalfield of Jharkhand state in India. In order to predict air pollution impact because of the proposed washery, modelling has been done using fugitive dust model. Dust levels (PM10 and PM2.5) have been assessed both for conditions of controlled and uncontrolled emissions from various sources of the washery. Baseline site specific air quality data (PM10 and PM2.5) of winter season and maximum coal washing capacity of 700 t h−1 have been considered for prediction of air quality in case of worst-case scenario. Based on modelling exercise, it has been predicted that PM10 concentration may increase from 0.058–51.333 and 0.039–17.485 μg m−3 under the conditions of uncontrolled and controlled emissions respectively at the air quality monitoring sites and the selected receptor locations in the nearby vicinity of the proposed washery. Similarly, PM2.5 concentrations may rise from 0.044–16.636 and 0.022–7.219 μg m−3 due to the uncontrolled and controlled emissions respectively. In order to minimize the fugitive dust levels from the washery site, installation of dry fog dust suppression system has been recommended at different dust generating sources in addition to implementation of other dust control measures in and around the coal washery. Keywords Coal washery . Air pollution . Emission factor . Dispersion modelling . Fugitive dust model . Air pollution control
1 Introduction Coking coal is a scarce commodity in India. Its demand is rapidly growing with the capacity expansion of existing steel plants and increasing awareness of the people of India regarding the importance of greenfield projects. Coking coal used for a blast furnace shall not go above 14–20% of ash content. However, Indian coal contains a much higher amount of ash content ranging from 30 to 45% [1]. Thus, the requirement of coal with permissible ash content needs proper design of washeries. Some non-coking coals are also cleaned to get better heat per unit of coal burned in thermal power plants. The major air pollution sources in washery area is the dust which is emitted during the crushing and screening, and loading and unloading of the clean coal as well as middling and rejects [2–8]. Vehicle movement on dusty roads in washery area emits substantial amount of dust [9, 10]. Vehicles plying in nearby area also produce significant quantities of gaseous * S. K. Chaulya [email protected] 1
CSIR-Central Institute of Mining and Fuel Research, Dhanbad 826 001, India
pollutants [11]. These sources create air pollution in a washery premise besides surrounding ambient air [12]. Steel Authority of India Limited (SAIL) is the major consumer of coking coal in India. Its requirement of coking coal will increas
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