| 摘要 |
A safety control system for a coal pulverizer utilizes signals (20,22) representing net oxygen and carbon monoxide measurements of the pulverizer atmosphere. A signal (50) representing the rate of carbon monoxide change is derived form the signal (22) by a derivative controller (48). The signals (20,50) representing the net oxygen measurement and rate of carbon monoxide change are compared in respective comparing means (36,52) with respective setpoints (38,54) to generate control signals (46,62) for actuating alarms (26,28). The pulverized oxygen and actual carbon monoxide signals (20,22) are compared in respective comparing means (64,88) with respective setpoints (66,90) to generate control signals (74,98) for causing automatic inerting of the pulverizer by supplying carbon dioxide thereto. |
