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