Blended pulverized coal combustion control device and method

Abstract

The invention discloses a blended pulverized coal combustion control device and method. The device organically integrates a pulverized coal preparation system, an injection system, a combustion system and a smoke processing system. A complete set of the device prepares pulverized coal through a ball mill, the injection system adopts a direct parallel-tank injection process, the grain size of the blended pulverized coal entering a combustion furnace is 80-120 mum, and the excess air coefficient is controlled to be 1.05-1.36. The combustion furnace conducts combustion reaction through double hearths, and when combustion reaction is conducted in one hearth, smoke enters another hearth to work in a circulation mode through a pipeline in the furnace. The processing system is arranged for discharged smoke, sulfur obtained by desulfurizing the discharged smoke can be used as a by-product of sulfur ointment to be sold, and secondary pollution is not caused. By means of the device, combustion efficiency of the blended pulverized coal is better than that of other devices and higher than 88%, and the blended pulverized coal combustion control device and method has the advantage of being simple in process, few in devices, less in covered area, short in plants, less in building investment, convenient to measure and the like. The device can also be applied to combustion of other solid fuels.

Description

technical field [0001] The invention relates to a blended pulverized coal combustion optimization control device and a method thereof. Background technique [0002] At present, my country is the largest producer and consumer of coal in the world, and it is also the only country that uses coal as its main energy source. The total amount of coal resources in Yunnan Province is 69.1 billion tons. By the end of 2006, the province's proven coal resources were 27.716 billion tons, and the predicted resources were 41.384 billion tons. Yunnan Province lacks resources. In 2005, the output of raw coal was 65.349 million tons, in 2006 it was 75.0924 million tons, in 2007 it was 80.3844 million tons, and in 2008 it was 86.5743 million tons. In 2012, the output of raw coal was 60.4 million tons, the target output was 120 million tons, the demand was 85.49 million tons, and the gap was 25.09 million tons. In 2015, the output of raw coal was 71.74 million tons, the target output was 130...

AI Technical Summary

Problems solved by technology

(2) The closed-loop balanced combustion control system (BCCS) is mainly to ensure that the total amount of fuel entering the combustion furnace is consistent with the amount of fuel required by the unit, resulting in unstable combustion, deviation of the center of the furnace flame, and coking of the water wall.

(3) There are many applications of combustion optimization control software, but poor adaptability to variable coal types and large-scale changes in load

For the blending of Yunnan lignite with bituminous coal and anthracite, there are few research reports on its combustion characteristics, combustion optimization control technology and equipment

Images