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Emission and pollution control: minimizing worker exposure during solid material sampling.
Chem Eng Prog 1984 Sep; 80(9):53-58
Worker exposure and injury during solid material sampling is reviewed. Control technology related to solid material sampling is examined. Solid material should be screened for toxicity, corrosivity, flammability, explosivity, reactivity, and radioactivity. The information required to identify hazards and associated operating conditions is summarized. This information includes: operating temperature and pressure; particulate size, hardness, and velocity; moisture content; and density. In addition, data is required on flowability, nesting or stacking characteristics, dustiness, and impurities. Data that the designer must consider on unit operation is presented and sample extraction designs of sampling devices are examined. The major types include cross cutting, gravity flow, auger, and retractable tube. The latter is the most sophisticated of the four designs, allowing automatic sampling of materials conveyed in positive and negative pressure systems. With regard to hazard control for solid sampling, often it is the collection/storage component of the sampling system that is overlooked. It is a primary source of toxic exposure to the worker. A facility operation that handles solid beryllium-oxide (1304569) is reviewed. The solid sampler and peripheral controls protect workers adequately from beryllium (7440417) exposure. The mandatory use of respirators when a worker is inside the vat room provides an additional protection factor. The author concludes that when a hazardous solid is being sampled, potential for worker exposure and injury always exists. The proper use of automatic samplers and control technology can keep some hazardous solids below what are considered OSHA permissible exposure concentrations. Worker exposure to hazardous materials during solid sampling can be minimized effectively.
Toxicology; Workplace-studies; Toxic-effects; Work-analysis; Work-operations; Workers; Air-monitoring; Radiation-measurement; Radiation-properties; Radiology
Issue of Publication
Chemical Engineering Progress
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division