Vortex tubular flame burner with low heat loss

A flame combustion and burner technology, which is applied to burners, gas fuel burners, combustion methods, etc., can solve the problems of reducing combustion heat load, reducing combustion efficiency and thermal efficiency, and increasing heat loss on the burner wall. The effect of increased load and improved uniformity of flame surface

Inactive Publication Date: 2018-01-12
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, regarding the temperature of the tube wall, the combustion of the fast mixing vortex tubular flame is only within the length of the slit-shaped inlet, and the temperature distribution of the tubular flame is near the central axis, so that the temperature of the tube wall at the burner head is very Low, but once it exceeds the length of the air inlet slot, the high temperature zone of the vortex tubular flame spreads rapidly to the tube wall, making the tube wall temperature reach above 1500K, the wall material is in danger of ablation, and at the same time, the heat loss of the burner wall increases sharply. Reduce combustion efficiency and thermal efficiency; Secondly, the flame formed by the traditional double-slit diagonal non-premixed air intake method is not a complete tubular structure, but two helical lines, which reduces the effective flame area and reduces the combustion heat load. At the same time, it causes incomplete combustion and uneven wall temperature distribution; finally, it is difficult to achieve the consistency of fuel and air flow rate in the existing rapid mixed intake method

Method used

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  • Vortex tubular flame burner with low heat loss
  • Vortex tubular flame burner with low heat loss
  • Vortex tubular flame burner with low heat loss

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Such as figure 1 and figure 2 As shown, a vortex tubular flame burner with low heat loss includes a cylindrical tubular burner body 1, and a port of the burner body 1 is provided with an airtight burner end cover 2. The burner body 1 is provided with two evenly distributed feed passages 3 in the circumferential direction on the section close to the burner end cover 2, and the feed passages 3 are communicated with the inside of the burner body 1 and The feeding direction of the feed channel 3 is tangent to the clockwise circumference of the burner body 1; the feed channel 3 is used to provide fuel and air required for flame combustion inside the burner. The feed channel 3 is axially divided into an air inlet 4 and a fuel inlet 5, and the fuel inlet 5 is close to the burner end cover 2; the cross-sectional area ratio of the air inlet 4 to the fuel inlet 5 is 2 -10:1.

Embodiment 2

[0019] Such as image 3 As shown, the difference from Example 1 is that the number of the feed channels 3 is four, and the angle between two adjacent feed channels 3 is 90°.

[0020] The three-dimensional simulation calculation is performed by the general flow reaction simulation commercial software Fluent.

[0021] 1. Figure 4 The distribution characteristics of the temperature field in the burner show that the flame surface is a complete cylindrical tubular flame, which proves the design idea. Near the wall surface, there is a layer of low-temperature non-reaction zone covering the flame surface, and the wall surface does not directly contact the high-temperature flame and high-temperature combustion flue gas, which can ensure the low temperature of the wall surface.

[0022] 2. Figure 5 The surface temperature distribution of the burner wall surface shows that the new burner can significantly reduce the temperature of the burner wall surface from above 1500K to below 8...

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Abstract

The invention discloses a vortex tubular flame burner with low heat loss. The vortex tubular flame burner comprises a cylindrical tubular burner body 1, a burner end cover 2 with airtightness is arranged on a port of cylindrical tubular burner body 1, and two circumferential uniformly-distributed feeding channels 3 are formed in a section, close to the burner end cover 2, of the burner body 1; thefeeding channels 3 communicates with the interior of the burner body 1, and the feeding directions of the feeding channels 3 are tangent with the clockwise or the anticlockwise circumferences of theburner body 1; and the feeding channels 3 are used for providing fuel and air required by flame burning of the interior of the burner; and the feeding channels 3 are divided into an air inlet 4 and afuel inlet 5 in the axial direction, and the fuel inlet 5 is close to the burner end cover 2. The vortex tubular flame burner with low heat loss has the obvious advantages that uniformity of the flamestructure characteristic in the flame surface is improved, the heat load is improved, and the wall face heat loss and burning instability decrease obviously.

Description

technical field [0001] The invention relates to the technical field of energy equipment, in particular to a vortex tubular flame burner with low heat loss. Background technique [0002] The vortex tubular flame burner is a combustion enhancement technology with simple structure, high efficiency and low pollution. It has a wide range of applications in industrial heating, improvement of combustion mode of high-performance engines, low calorific value gas and combustible waste gas treatment. The specific characteristics of the tubular flame combustion technology are as follows: 1. The structure is simple, the main body of the combustion chamber is a circular tube, there is no sudden expansion section common to most types of burners, and the pressure loss is small; 2. Compared with the conventional swirl combustion technology, the swirl flow During combustion, the centrifugal force generated by the high-speed rotation in the combustion tube is more than 1000 times the accelerat...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): F23D14/02F23D14/76
Inventor任守军蒋利桥杨浩林赵黛青
OwnerGUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI