CE IGCC repowering project preliminary hazard analysis. Topical report, November 1, 1990--May 31, 1993.

摘要

A preliminary hazard analysis was conducted on the CE IGCC unit by representatives from ABB Lummus Crest Process Systems, Lummus Technical Division, Combustion Engineering, and Lummus Initial Operations. As a basis for the review, available technical data and documentation was used. Two areas of the unit were reviewed, the coal yard delivery system and the gasifier island. The coal yard consists of the coal delivery and handling systems, both of these systems are conventional. The gasifier island encompasses the coal pulverizer and feed system, gasifier and syngas cooler, char removal system, char recycle system, and high temperature sulfur removal system. With first of a kind equipment incorporated in the gasifier island, most of the concerns of potential hazards were centered here. At the time of the review, there were no process flow diagrams for the rest of the combined cycle. To prevent detaining the review of the gasifier island, the remaining areas were not reviewed at this time. However, the remaining areas will be reviewed before final unit design is completed. In reviewing the above mentioned systems, the PHA identified several hazards which will be the basis for a subsequent detailed Hazard and Operability (HAZOP) study which will be performed at a later stage of this project. Results from the evaluation were documented by the team and then reviewed by engineers in the IGCC Product Development department. From the concerns of risks developed by the review team, rethinking of proposed operation and design of the plant during the preliminary design stages took place. (In doing so, cost and redesign time during final design phase will be reduced).