Industrial pulverized coal boiler burner with secondary air axial blade angle capable of being adjusted

Abstract

The invention discloses an industrial pulverized coal boiler burner with the secondary air axial blade angle capable of being adjusted. The industrial pulverized coal boiler burner includes a centralair pipe, and a primary air casing, a reducing secondary air casing, a separation air casing, a combustion-supporting air casing and a separation afterburning wind volute which successively sleeve thecentral air pipe from inside to outside, the separation air casing for delaying mixing of reducing secondary air and combustion-supporting air is arranged on the outer wall of the reducing secondaryair casing in a clung mode, a combustion-supporting air passage is arranged between the outer wall of the separation air casing and the inner wall of the combustion-supporting air casing and used forintroducing the combustion-supporting air, the combustion-supporting air passage is internally provided with a plurality of axial cyclone blades in the circumferential direction, and a plurality of separation afterburning vanes are arranged along the axis of the central air pipe on the separation afterburning wind volute. A cyclone burner is suitable for powder feeding and combustion of an industrial pulverized coal boiler, the fire stability in a furnace can be improved, and meanwhile, NOx production during combustion can be lowered.

Description

technical field [0001] The invention belongs to the technical field of thermal energy and power engineering, and relates to a burner for a coal-fired industrial pulverized coal boiler, in particular to a burner for an industrial pulverized coal boiler with an adjustable secondary air axial blade angle. Background technique [0002] Although China has vigorously developed new energy in recent years, the energy structure rich in coal and poor in oil has caused coal to still occupy the dominant position in China's energy consumption. The results of the "China Statistical Yearbook" show that in 2016, China's energy consumption reached 4,358.1863 million tons of standard coal, of which coal consumption reached 2,703.2 million tons of standard coal, accounting for 62% of the total consumption. my country's industrial boilers are limited by fuel prices, and the main fuel used is still coal. There are about 460,000 coal-fired industrial boilers, and the average efficiency of industr...

AI Technical Summary

Problems solved by technology

my country's industrial boilers are limited by fuel prices, and the main fuel used is still coal. There are about 460,000 coal-fired industrial boilers, and the average efficiency of industrial boilers is less than 70%. At the same time, dust, NOx, SOx and other pollutants are discharged relatively high

The existing swirl burners used in coal-fired industrial boilers make the ignition stability in the furnace poor, and the formation of NOx during the combustion process is relatively high, which cannot meet the current strict emission requirements

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