Micro-oil ignition rotational flow breeze combustion device for preventing slag bonding of primary combustion chamber

Abstract

The invention discloses a micro-oil ignition swirling pulverized coal burning device for preventing slag formation in a first-class burning chamber, which relates to a swirling pulverized coal burning device for preventing slag formation in a first-class burning chamber, and aims at solving the problems of easy slag formation in the burning chamber during burning and large oil consumption for ignition under low-load stable burning of the existing micro-oil ignition swirling pulverized coal burner. A concentration ring is fixed in a first air channel pipe, a sleeve is fixedly arranged in the concentration ring, the first-class burning chamber and a second-class burning chamber are fixed in the first air channel pipe at the front end of the sleeve, one end of a main oil gun is fixed in the sleeve, a second air channel pipe is fixedly sheathed on the first air channel pipe, an inner swirler is fixed in an inner secondary air channel, a third air channel pipe is fixedly sheathed on the second air channel pipe, an outer swirler is fixed on an outer secondary air channel, the axial distance between the sleeve and the first-class burning chamber is b, a backflow area is generated at the front end of the sleeve, the axial distance between the front border of the backflow area and the mouth of the sleeve is a, and b is more than a. The burning device has the advantages of having no slag formation in the first-class burning chamber during burning and small oil consumption for ignition.

Description

technical field [0001] The invention relates to a swirl pulverized coal combustion device for preventing slagging in a primary combustion chamber. Background technique [0002] Large-scale power plant boilers consume a lot of oil during ignition and low-load stable combustion. In order to save fuel, power generation companies shift the focus of fuel saving from low-load stable combustion to boiler ignition and shutdown (oil consumption accounts for 60% when power plant boilers start and stop. , low-load stable fuel consumption accounts for 40%). Swirl burners occupy a certain proportion in my country's power plant boilers and other pulverized coal applications. The large pulverized coal boiler with swirl burner has its unique advantages: firstly, it can avoid the thermal deviation in the superheater area; secondly, there is no strict requirement on the shape of the furnace. With the development of large-capacity units in my country, there is an urgent requirement for the d...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a micro-oil ignition swirl pulverized coal combustion device that prevents slagging in the primary combustion chamber, so as to solve the problem of easy generation of slagging in the combustion chamber when the existing micro-oil ignition swirl pulverized coal burner burns. The problem of large ignition fuel consumption under the condition of low load and stable combustion

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