Movable gas turbine power plant waste heat boiler heating surface oxide skin purging device and method

Abstract

The invention provides a movable gas turbine power plant waste heat boiler heating surface oxide skin purging device and method. The device comprises a crawling module, a sound wave-pulse compressed air purging module, a swing module, a video acquisition module and a control module. The method comprises the steps that the control device moves to a to-be-purged area; sound wave and pulse compressed air composite purging is carried out; blowing by swinging and observing the blowing effect; and entering the next purging area. The advantages of sound wave soot blowing and gas soot blowing are comprehensively utilized, and under the condition that the gas blowing defects are improved and overcome, efficient blowing of the oxide skin on the heating surface of the waste heat boiler is achieved; by adding the swing module, the video acquisition module and the like to the purging device, the purging coverage area is increased, the visualization of the purging process is realized, meanwhile, the whole purging process is recorded, traceable video records are stored, automatic crawling of the purging device within a certain range and remote control of the whole purging process are realized, and the reliability of the purging device is improved. And the automation degree and the controllability of the purging process are improved.

Description

technical field [0001] The invention relates to the technical field of gas turbine power generation, in particular to a device and method for purging scales on the heating surface of waste heat boilers in mobile gas turbine power plants. Background technique [0002] The exhaust gas temperature of the gas turbine is as high as about 600°C, and an oxide film will be formed on the heating surface under high temperature conditions. The oxide film is generally composed of Fe 2 o 3 · Fe 3 Composed of O4·FeO, the thickness is relatively thick. When the thickness increases to a certain critical thickness, it will spontaneously destroy, and peel off and accumulate on the fins. [0003] After the accumulation of scale on the heating surface of the waste heat boiler, the heat transfer capacity of the superheater, evaporator and economizer decreases, resulting in an increase in the flue gas temperature at the waste heat boiler outlet and a decrease in the heat transfer efficiency of ...

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Problems solved by technology

[0004] At present, the commonly used methods of removing scale include sonic purging, steam purging, shock wave purging, mechanical rapping, etc., each of which has its own limitations. For example, although sonic purging has no dead ends and no corrosion, its cleaning effect is average; Although steam blowing can remove the highly adherent scale, it has dead ends; although shock wave blowing has high efficiency, wide adaptability, and simple structure, it is easy to cause damage to the heating surface tube; although mechanical vibration will not damage the Fumes add additional media, but have an adverse effect on the strength and life of header fillet welds

[0005] In order to overcome the limitations of the existing technology, improve the efficiency of waste heat boiler purging and reduce the damage to the heating surface of the waste heat boiler during the purging process, a device and method for purging the oxide skin on the heating surface of the waste heat boiler in a mobile gas turbine power plant are designed.

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