COHPAC & TOXECON

Hamon Research-Cottrell is an experienced licensed supplier of EPRI's COHPAC™ & TOXECON™ particulate and mercury reduction technologies. Full-scale demonstration of TOXECON™ was conducted at the Alabama Power, E.C. Gaston COHPAC™ installation and has been in commercial operation on the American Ref-Fuel, SEMASS waste-to-energy COHPAC™ installation since 2000. To date, Hamon Research-Cottrell has installed over 1,700 MW of COHPAC™ technology, on both coal-fired boilers and waste-to-energy incinerators.

COHPAC™ and TOXECON™ are EPRI licensed technology which is centered around the combination of an existing or new electrostatic precipitator with a Hamon Research-Cottrell high air to cloth ratio LPHV pulse jet fabric filter.

The fabric filter is located in a separate casing downstream of the ESP (known as COHPAC I) or within the existing ESP's casing by replacing one or more fields of collecting plates with fabric filter modules (COHPAC II).

COHPAC I

COHPAC II

The technology is based on the fact that a fabric filter collects higher levels of particulate - and finer particulate - than an ESP of equivalent size. The baghouse acts as a "polishing device" which can bring particulate emissions into compliance at very low levels and offers an optimal site for injection of sorbents such as activated carbon for mercury control.