A large chemical plant serving the food and agriculture industry needed to reduce acid mist emissions from an existing oxidizer and scrubber exhaust stack. The PM2.5 loadings were low, but the plant was still not meeting its required target.

Plant engineers reached out to Monroe Environmental to help evaluate the best technology for the application, and several options were reviewed. Monroe engineers ultimately proposed a high-efficiency wet filtration scrubber that could continuously remove acid mist from the exhaust gas, even down to 1-micron. Monroe provided a complete scrubber system skid that included:

• Multi-Stage Scrubber housings, FRP construction, with filters, spray nozzles, and mist eliminators
• Liquid reservoir with PTFE lined pipe, valves, and recirculation pumps
• Instrumentation to monitor pH, conductivity, gas differential pressure, liquid flow/pressure, and other key operating metrics
• Class 1 Div. 2 rated electrical enclosures and instruments
• Pre-piped and pre-wired skid assembly with conduit, supports, and grating/handrail

The scrubber was successfully installed and allowed the plant to meet its acid mist/PM2.5 emission requirements at a much more attractive cost than alternative technologies. The system was rated for approximately 6,000 ACFM.