Ei BWON Intelligence

Benzene Waste Operations NESHAP, or the BWON Rule, is a complex air compliance regulation, which requires that affected facilities manage and/or control benzene emissions.  

There are a number of applicability thresholds that “trigger” BWON compliance. The “BWON triggers” are driven by the physical and chemical make-up of the refinery-wide collection of wastewater streams. Presently, refineries rely on the development of an annual waste stream inventory to calculate Total Annual Benzene (TAB) emissions. This process is a tedious one and relies on a number of assumptions that are based in part on refinery stream speciation data, as well as, process engineering and operations knowledge.

With the advent of the Ei BWON Module, Ei is developing the technology to evaluate BWON compliance from the bottom-up. The Ei BWON Module connects stream speciation and refinery flowrate data, such as from refinery Distributed Control Systems (DCS), to object-oriented, intelligent P&IDs and allows users to perform a range of BWON compliance data tests. Intelligent P&ID users are now empowered to perform checks on sour water stream applicability (based on > 10 ppm ammonia and hydrogen sulfide content) and waste stream applicability (based on waste streams with greater than 10% water content. The Ei BWON Module will perform applicability determinations for intelligent P&IDs that are tied to a refinery’s TAB report.

The end-product is a set of automatically generated drawings that are color-coded based on BWON applicability.