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Secondary concentration double-nozzle micro-oil pulverized coal igniting device

A technology of secondary concentration and small amount of oil, which is applied in the direction of burning powder fuel burners, burners, combustion ignition, etc., can solve the problems of difficult ignition, high ignition calorific value, large heat absorption of pulverized coal, etc., and achieve easy lit effect

Active Publication Date: 2009-10-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing W-type flame boiler has a small amount of oil to ignite the pulverized coal device, which has a large heat absorption and a high ignition calorific value, is not easy to be ignited, and is prone to ignition failure when igniting lean coal and anthracite To solve the problem, provide a secondary concentration double nozzle micro oil volume ignition pulverized coal device

Method used

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  • Secondary concentration double-nozzle micro-oil pulverized coal igniting device

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specific Embodiment approach 1

[0007] Specific implementation mode one: combine Figure 1 ~ Figure 4 Describe this embodiment, this embodiment comprises upper furnace 1, secondary air box 9, two furnace arches 12, lower furnace 13 and two burners 22, upper furnace 1 is connected with lower furnace 13 through furnace arch 12, each furnace The arch 12 is sequentially provided with two dense coal powder air flow nozzles 10 and light coal powder air flow nozzles 11 from the inside to the outside. On the top, the secondary air box 9 is fixed on the outer wall of the upper furnace 1 and the lower furnace 13, and each burner 22 is composed of a primary air duct 2, a grid divider 3, a pulverized coal thick and thin separator 4, and two thick pulverized coal Pipeline 5, light pulverized coal pipeline 6, light thick pulverized coal pipeline baffle 7, cooling jacket 8, partition 14, main oil gun 15, fire detector 16, auxiliary oil gun 17 and cooling jacket baffle 18, grid The inlet end of the grid equalizer 3 is conn...

specific Embodiment approach 2

[0008] Specific implementation mode two: combination figure 1 and image 3 To illustrate this embodiment, the included angle θ between the bent pipe section 21 and the straight pipe section 23 on the concentrated pulverized coal pipeline 5 of this embodiment is 50°. When the included angle θ is 50°, the centrifugal force generated when the high-concentration pulverized coal passes through the elbow section 21 is moderate, and the secondary concentration effect is good. Other compositions and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0009] Specific implementation mode three: combination Figure 4 To describe this embodiment, the included angle α between the main oil gun 15 and the centerline of the burner 22 in this embodiment is 60°. Such design enables the main oil gun 15 to directly ignite the high-concentration pulverized coal that has been concentrated twice. Other compositions and connections are the same as those in the first embodiment.

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Abstract

The invention provides a secondary condensation double-nozzle micro-oil pulverized coal igniting device, and relates to a micro-oil pulverized coal igniting device of a W-shaped flame boiler. The device solves the problems of high heat absorption capacity, high ignition heat value and difficult ignition existing in the micro-oil pulverized coal igniting device of the prior W-shaped flame boiler. Both ends of a grid evenly dividing device are connected with a primary air pipe and a pulverized coal rich-lean separator respectively; the lower end of the pulverized coal rich-lean separator is connected with two rich pulverized coal pipes and two lean pulverized coal pipes respectively; the lower ends of the rich pulverized coal pipes and the lean pulverized coal pipes are communicated with a lower hearth respectively; the rich pulverized coal pipes are provided with bent pipe segments; a main oil gun, a fire detector and an auxiliary oil gun are orderly arranged on the outer side walls of the rich pulverized coal pipes from top to bottom and under the bent pipe segments; and a cavity formed between a clapboard and the main oil gun is a first-level combustion chamber, and a cavity formed under the clapboard is a second-level combustion chamber. In the device, the secondary concentration is carried out by the bent pipe segments in the two rich pulverized coal pipes of the pulverized coal rich-lean separator, so that the concentration of the pulverized coal is improved, and the pulverized coal is easily ignited.

Description

technical field [0001] The invention relates to a device for igniting pulverized coal with a small amount of oil, in particular to a device for igniting pulverized coal with a small amount of oil for secondary concentration and double nozzles applied to a W-shaped flame boiler. 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%). Therefore, the research on micro-oil ignition combustion technology is of great significance to the development of my country's electric power industry and the entire national economy. Chinese patent "Energy Saving Trace Oil, Natural Gas Ignite Pulverized Coal Combustion Device", an invention patent wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D1/00F23Q9/08
Inventor 李争起刘春龙陈智超赵洋韩云峰
Owner HARBIN INST OF TECH
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