A thick-thin separation type cross-load decoupling burner

Abstract

The invention discloses a dense-dilute separation type cross-load decoupling combustor. The combustor comprises a central air duct, an inner primary air duct, a dilute side inner primary air collecting channel, an inner primary air dilute side leading-out pipe, a swirl inner secondary air duct, an outer primary air duct and a swirl outer secondary air duct, pulverized coal dense-dilute separatorsarranged on the inner wall of the inner primary air duct are in a necking shape along the airflow direction, the surfaces of the pulverized coal dense / dilute separators are three-dimensional filter powder holes or three-dimensional filter powder gaps which are arranged in a staggered mode, the dense-dilute separation effect is enhanced, the dilute side inner primary air collecting channel which isarranged behind the pulverized coal dense-dilute separators is communicated with the inner primary air dilute side leading-out pipe and is communicated with the outer primary air duct, the dilute side inner primary air collecting channel is used for supplying air for the outer primary air duct during low-load operation of the boiler. The combustor can realize coupling and decoupling operation ofthe inner primary air and the outer primary air during variable load operation of the boiler, the dense-dilute separation is realized, the combustion stability is improved, the NOx emission is reduced, and the overall energy consumption of the boiler is reduced.

Description

technical field [0001] The invention relates to the fields of pulverized coal combustion technology and environmental protection technology, in particular to a thick-thin separation type cross-load decoupling burner. Background technique [0002] With my country's increasing emphasis on energy conservation and emission reduction, the structural renewal and transformation of coal-fired boilers in power stations has become increasingly important. When optimizing the structure of the burner, the focus is on solving the problem of optimizing the stable combustion of pulverized coal and reducing NOx emissions. The pulverized coal concentration separation technology is currently one of the most widely used and most mature mainstream low NOx technologies. [0003] Power plant boilers will alternate between high-load operation and low-load operation. In the case of low-load operation of the boiler, the burner is "big horse-drawn cart", which makes the overall energy consumption re...

AI Technical Summary

Problems solved by technology

In the case of low-load operation of the boiler, the burner is "big horse-drawn cart", which makes the overall energy consumption higher, and the investment and operating costs also increase accordingly

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