chapter - 1 introduction - Meghalaya State Pollution Control Board

Hills Cement Co. Limited.
1. Raw material storage and transport- Bag filter
2. Raw meal preparation- Bag filter & Bag house
3. Blending Silo- Bag filter
4. Preheater, Kiln & Cooler- Cooler ESP
5. Clinker Silo- Bag filter
6. Cement Grinding- Bag filter
7. Packing Plant- Bag filter
8. Coal Grinding- Bag filter
Similarly ESP will be installed in the Captive power plant to arrest the
particulate matter. The efficiency of ESP will be 98% to maintain the emission
level.
The dust concentration level in the chimney will be periodically monitored.
Sulphur-dioxide and Nitrogen dioxide can be control by limestone charging,
or by keeping AFBC boiler combustion temperature below 900°C.
Fly Ash will be removed on the principle of Dry Dense Phase Pneumatic
System and transported in dry condition to an Ash Silo. Ash from the Silo will
be transported internally to the Fly ash inlet hopper of the Cement Plant. Fly
ash shall be conditioned (moistened by water) at the Ash Silo Outlet
satisfying the Environmental requirement.
More granular bottom ash being only of very small quantity will be reused,
after proper sieving, as bed materials in AFBC Boiler.
Fugitive emissions are generated from material handling systems; raw
material storage yards and material movement will be suppressed by water
spraying.
There will be no major leveling operation and hence so no major excavation
will be necessary except for the purpose of foundations. Dust, the major
source of air pollution is likely to be generated from construction activities and
transportation. Hence water sprinkling will be done on regular basis in the
months December to March. The construction vehicles will be properly
maintained to minimize smoke in the exhaust emissions.
Pollution Control Consultants (India) Pvt. Ltd. 94