Dust Hazard Analysis (DHA) Study
Coal & Solid Fuels handling facilities
The most recent NFPA publication applicable to cement and lime plants, NFPA 652, mandates that every industrial facility handling solid fuels needs to complete a Dust Hazard Analysis (DHA) Study by August 2018, after which deadline plants risk becoming non-compliant.
Most cement and lime plants use coal and other solid fuels for their operation and therefore come under the purview of this mandate.
NFPA 652 “Standard on the Fundamentals of Combustible Dust” was created to include several older standards (NFPA-61, 68, 654) as a single go-to source for a systematic study of fire and explosion hazards and to develop mitigation measures.
The DHA Study promotes awareness of the following principles:
It applies to equipment handling coal and other combustible dusts, including Dust Collectors, Bucket Elevators, Drag and Screw Conveyors, Pneumatic Conveying Systems, and Storage Bins and Silos.
DHA consists of 3 main steps to complete the analysis.
Material and Process Identification:
Material and Process Hazard Analysis:
Hazard Management Plan
The Hazard Management Plan outlines the mitigation measures to be implemented for managing the suppression of deflagration and/or isolation of the source of deflagration. A written management system is developed for operating the facility to prevent or mitigate fires, deflagrations, and explosions from combustible particulates.
NFPA 652 outlines the topics to be covered in DHA and recommends a format to present the report.
PEC Consulting can help carry out a DHA Study for new or existing cement & lime plants and help the clients to develop a Hazard Management Plan.