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# Online calculation of dust emission from coal piles, calculation of environmental impact assessment

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### App Description

Calculation formula for dust emission of coal piles in Qinhuangdao Wharf:   $$QP=2.1K \times (U-U0)^3 \times e^{-1.023w} \times P$$

In the formula:

• Qp - dust amount of coal pile, kg / a;
• K - the empirical coefficient is a function of the water content of the coal, taking K = 0.96;
• U - average wind speed of coal yard, m / s;
• U0—the starting wind speed of coal dust, m/s, taking 3.0m/s;
• W - surface moisture content of coal dust, %;
• P - cumulative coal accumulation in coal yards, t/a.

### Estimation of coal dusting parameters and calculation results

parameter Calculation results
U(m/s) Qp(kg/a) Wind frequency(%) Actual amount of dust(t/a)
Coal pile(t/a)

4000

4.0 7279.85 3.28 0.24
Coal moisture(%) 10 5.0 58238.8 2.48 1.44
k 0.96 6.0 196555.95 1.29 2.54
U0(m/s) 3.0     total4.22

### Usage example

Input data:

• K - empirical coefficient, a function of coal moisture content: 0.96
• U - average wind speed of coal yard, m/s: 9
• U0— Starting wind speed of coal dust, m/s, take 3.0m/s: 4
• W - surface moisture content of coal dust, %: 10
• p - cumulative coal accumulation in coal yards, t/a: 40

Click "Calculate" to output data

Coal dust generation, kg/a: 40