Safe Height of Chimney

Safe Height of Chimney

The height of stacks plays a major role in the ground level concentration expected on the downwind side. As per emission regulations ( July 1984) part 1 published by central board of prevention and control of water pollution (CBPCWP), New Delhi, the stack height is to be determined by adopting following conditions: -

1. For stack emitting particulate matters: -

Where,

h = height of stack (chimney) in m.

QP = particulate matters emission in t/hr.

2. For stack emitting gaseous pollutants: -

Where,

h = height of stack (chimney) in m.

Q = rate of SO2 gas emission in kg/hr.

3. Minimum height of stack: -

The minimum height of chimney should not be less the following

Relaxation in minimum stack height

Some relaxation in minimum height of stack is made for boiler sets