In view of the poor quality of coal and the incertitude of the change of the AGC load directive,this thesis analyzed the spot of excessive temperature during the process of operating boiler for SG420t/h and summed up the measures of the solution.

;effecting factors on the over-temperature of primary reformer tubes;temperature reducing for reformer tubes and its disposal method were supposed;it was indicated that avoiding to separate out the carbon was the important measure to control over-temperature of primary reformer tubes.

The cause of tube explosion of HG670/140-9 boiler water cooled wall is comprehensively analyzed in terms of water circulation, internal leakage of regular exhaust valve, uneven heating surface of water cooled wall and over-temperature due to tube blocking.

Analysis on over temperature tube-burst of the 1025 t/h boiler s reheater and its transformation;

Improving on over temperature situation on reheater of Mitsubishi 2 290 t/h boiler;

The cause of over temperature phenomenon during the heating procedure of high-temperature shift(HTS) catalysts, as well as the effect of remaining lower-valent iron and higher valent chromium, during catalyst preparation, on the performance of HTS catalyst were discussed.

Analysis and solution to overheating of boiler final reheater tubes;

Analysis on Tube Overheating and Construction Reformation of Panel Reheater in 465t/h Boiler;

This paper reviews and analyzes the phenomenon of Texaco gasifier wall overheating and the reasons, taking typical overheating failures in the past years as examples,and proposes countermeasures from the aspects of equipment supervision, process operation and technical revamp,etc.

Preventing Overtemperature of Second Steam Regulating Heat Surface;

The research and technical transformation of the problems of overtemperature and tube explosion in the pendant superheater of the power boiler;

Through inspection of the pipes,analysis of coal quality,and cold-state test of the reheater,it is believed that the crack of elbow is a typical thermal fatigue crack,resulting from deviation of actual coal sort from the designed coal sort,and temperature deviation of flue gas at outlet of the furnace,thus,leading to overtemperature of the heating surface,and frequent.

A certain cement exhaust-heat afterburning boiler worked in special comprehensive utilization,superheated steam exist serious excess temperature with unique design burner and overheater,its phenomenon standed out in start-up process,the reason and improved notion were launched.

In order to solve the problem of excess temperature of the superheater and the reheater in Shangan power station we put a trail on the 350MW W flame boiler.

The main steam temperature on the low side and the platen superheater excess temperature in the 670 t/h boiler of Shentou No.