A major pharmaceutical company is implementing an expansion project in their Midwest facility. It includes two production Fermentors,
H2S is a highly toxic gas that can kill or seriously harm human health when exposed to it. For general industry the OSHA permissible exposure limit (PEL) is 20 ppm for an 8 hour period. The specification requires 99.9% removal which achieves less than 1.5 ppmv, well below the PEL.
Installation is on the first floor with a limited footprint area of 18 ft L x 8 ft W. Redundancy is required for pumps and ID fans. The customer desires maximum integration and pre-assembly to limit installation work on site.
The customer selected an Envitech H2S packed bed scrubber. The scope includes a fiber reinforced plastic (FRP) packed bed absorber, instruments, recirculation pumps (1 operating, 1 spare), pre-assembled CPVC piping, valves, and fittings with pre-mounted instruments, metering pumps, ID fans (1 operating, 1 spare), interconnect duct, and stack.
The stack passes through a second floor before breeching the roof. Fans are located near the outlet on a mezzanine. A custom arrangement accounts for obstacles and interferences in the installation space.
An entrainment separator at the top of the absorber removes water droplets before exiting the scrubber.
The equipment has been delivered and will be installed in early 2020. Design and performance parameters are summarized below.
DESIGN PARAMETER
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