Ultra-supercritical octagonal circle cutting coal-fired power plant boiler cold-state dynamic field test method

Abstract

The invention relates to an ultra-supercritical octagonal circle cutting coal-fired power plant boiler cold-state dynamic field test method. The method comprises the steps that an air and flue gas system, an air damper and a combustor of an ultra-supercritical octagonal circle cutting coal-fired power plant boiler are checked; cold-state leveling of the air speed of a pulverized coal pipe of the ultra-supercritical octagonal circle cutting coal-fired power plant boiler is performed; primary air flow calibration and secondary air flow calibration are performed on an inlet of a coal mill of the ultra-supercritical octagonal circle cutting coal-fired power plant boiler; the air speed of a nozzle of the combustor and the air flow speed of a horizontal flue of the ultra-supercritical octagonal circle cutting coal-fired power plant boiler are tested, and the attaching and avoiding air speed inside the boiler is tested. On the combination of the results of the steps, the cold-state dynamic field law of the ultra-supercritical octagonal circle cutting coal-fired power plant boiler is obtained. According to the method, references can be provided for cold-state dynamic field tests of other million thermal power generating units of the same kind, the cold-state dynamic field law can be obtained according to the tests for adjusting wrong positions of a dynamic field inside the boiler, and a foundation is laid for unit hot starting and tests.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to an ultra-supercritical octagonal tangential circle coal-fired power plant boiler cold-state dynamic field test method. Background technique [0002] Due to the increase of steam pressure and steam temperature, the thermal efficiency of ultra-supercritical units is nearly 10% higher than the average level of domestic units. Therefore, the development of ultra-supercritical thermal power units is the main development direction of thermal power units at home and abroad. Some researchers used ANSYS FLUENT14.0 software to carry out numerical simulation of the combustion characteristics of Shajiao C Power Plant under different loads after low-nitrogen transformation, and mainly studied the laws of furnace velocity field, temperature field, component field and pollutant concentration distribution. There are also some researchers who have carried out numerical simulation research...

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Problems solved by technology

However, there is a big difference in the cold-state dynamic field test methods between the octagonal tangential boiler and the quadrangular tangential boiler. It is difficult to actually measure complex sites, and there is currently no relevant field test method for the cold dynamic field of an octagonal tangential boiler

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