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Mixed gas combustor

A technology for mixing gas and burners, applied in the directions of gas fuel burners, burners, combustion methods, etc., can solve the problems that the type of gas burners cannot be adapted, the combustion characteristics of gas fuels are very different, and save equipment costs and The effect of running costs, large pipe size, and low gas pressure

Active Publication Date: 2012-07-18
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the combustion characteristics of gas fuels vary greatly with different mixing ratios, the original gas burner type cannot adapt

Method used

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  • Mixed gas combustor
  • Mixed gas combustor
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Examples

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Embodiment Construction

[0027] The present invention will be further described below in combination with specific embodiments and accompanying drawings.

[0028] like Figures 1 to 3 As shown, the new mixed gas burner is a circular burner. Each burner is composed of two channels nested inside and outside. The air inlet is provided with a damper baffle 3 for adjusting the air intake. A single large-sized air gun tube (gas channel 2) is arranged in the center of the burner, and the nozzle hole 4 at the front end of the air gun (gas channel 2) is formed by dividing 5 segments with 22 built-in tangential blades. The area of ​​the nozzle hole 4 is large, and the gas ejection speed relatively low. The vanes are preferably inclined by 30° relative to the radial direction of the gas channel. The burner nozzle 6 adopts a constricted type, which can strengthen the mixing of fuel and air, and make the mixed gas fuel have an appropriate flow velocity. The nozzle hole 4 of the air gun (gas channel 2) is locat...

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Abstract

The invention discloses a mixed gas combustor, relating to a gas combustor. The mixed gas combustor comprises two channels which are embedded inside and outside, a combustion air channel is arranged on the periphery and a fuel channel is arranged in the center, a burner nozzle is formed on the front end of the combustion air channel, and the front end of the fuel channel is provided with a spraying orifice for enabling fuel in the fuel channel to be radially outwards spirally spayed. The invention aims at providing the novel gas combustor, which has better stable combustion while combusting low-heat-value gas fuel with large flow, can not cause nozzle burning and coking problems while combusting high-heat-value gas fuel with small flow, and can combust a mixed fuel of a low-heat-value gas fuel and a high-heat-value gas fuel.

Description

technical field [0001] The invention relates to a gas burner, in particular to a gas burner used in a boiler. Background technique [0002] The gas burners used in boilers are mainly divided into high calorific value gas burners and low calorific value gas burners. High calorific value gas burners are mainly used to burn natural gas and coke oven gas, etc. Generally, small-hole air guns are used. According to the capacity, the burner can be equipped with single or multiple guns. Small-hole air guns have the disadvantages of large resistance and easy coking and blockage. Low calorific value gas burners are mainly used for burning blast furnace gas, etc., and are divided into two types: flameless type and flame type. The flameless burner has good combustion stability but is large in size, and is only suitable for small-capacity gas fuel combustion; grid-type spout burners can be used for large-capacity gas combustion, but its combustion stability is poor, so the gas fuel The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D14/22F23D14/58
Inventor 但家瑜
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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