600 MW Supercritical Boiler´s Main Steam Temperature Control Analysis

Main Steam Temperature is an important parameter for boiler´s safety and economically operating that must be controlled at design point strictly by using control system. The characteristics and methods of Control system on 600 MW Supercritical Boiler´s Main Steam temperature were described in this paper. Operation information is given and shown that the main steam temperature overheating appears commonly in actual operation process. In order to precisely learn the working condition of 600MW supercritical boiler, new temperature measuring points are set on the superheater tube wall inner the flue. The experimental results shown that the tube wall temperature changes swiftly with the load variation. There is significant temperature bias between testing cells at same superheater stage.