Boiler high-temperature heated surface steam side overheat pipe burst prevention method

Abstract

The embodiment of the present invention discloses a prevention and control method for over-temperature tube bursting on the steam side of the high-temperature heating surface of the boiler, which is used to solve the problem of tube bursting, Technical issues related to a series of problems such as over-temperature tube explosion and reduced parameter operation. The method of the embodiment of the present invention includes: checking the structural design of the high-temperature heating surface to ensure that the heating and heat dissipation of the high-temperature heating surface are balanced; improving the adjustment efficiency of the temperature adjustment device system on the high-temperature heating surface; Check and control of foreign matter in the steam-water pipeline; optimize the operation of the boiler; and conduct online monitoring of the steam temperature in the tube on the high-temperature heating surface.

Description

technical field [0001] The invention relates to the technical field of boilers in thermal power plants, in particular to a method for preventing and controlling overtemperature tube explosion on the steam side of the high-temperature heating surface of the boiler. Background technique [0002] The large heat load and high parameters of modern large-scale boilers have made the tube wall temperature of the high-temperature heating surface close to the maximum allowable temperature of steel. In the 600°C ultra-supercritical units that have been put into operation, tube explosions frequently occur on heating surfaces such as water-cooled walls, which has become a major hidden danger that plagues the safety of ultra-supercritical coal-fired power generation technology. The most common boiler accidents are "four-tube explosion and leakage". Since the superheater and reheater work in the harsh environment of high-temperature flue gas for a long time, the superheater and reheater ov...

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Problems solved by technology

[0004] The embodiment of the present invention provides a method for prevention and control of over-temperature tube explosion on the steam side of the high-temperature heating surface of the boiler, which solves the problem of tube explosion and over-temperature in the current large-capacity, high-parameter power plant boilers caused by the overtemperature of the metal wall temperature on the high-temperature heating surface in the furnace. Technical issues related to a series of problems such as thermal explosion tube, derating operation, etc.

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