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A decoupling gas burner and its use method

A gas burner and decoupling technology, which is applied in the combustion method, combustion using multiple fuels, combustion using block fuel and gaseous fuel, etc., can solve the problems of poor mass transfer, non-flammability, and reduced combustion efficiency.

Active Publication Date: 2021-04-09
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, staged combustion and large flue gas volume (lower oxygen concentration) make the mass transfer between combustibles and oxygen worse, and it is difficult to burn out in the later stage of combustion, resulting in a decline in combustion efficiency, which strengthens the coupling relationship between low-nitrogen combustion and high-efficiency combustion

Method used

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  • A decoupling gas burner and its use method
  • A decoupling gas burner and its use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] This embodiment provides a method for using a decoupled gas burner. The method specifically includes the following steps:

[0098] (I) The central gas is sprayed into the furnace through the central gas pipe 8, and the primary air introduced by the primary air channel enters the furnace through the primary wind swirl blade 9, and the central gas and the primary air are mixed and initially burned in the furnace;

[0099] The central gas accounts for 20% of the total gas volume of the decoupled gas burner. The first-level wind includes central outer circulation flue gas and central air. The volume ratio of the central outer circulation flue gas to the total air volume of the decoupled gas burner is 1% under standard conditions, and the central air volume accounts for 1% of the total air volume of the decoupled gas burner. 5% of the total air volume.

[0100] (II) The gas in the air chamber 19 enters the secondary air channel to form the secondary air, and the secondary a...

Embodiment 2

[0105] This embodiment provides a method for using a decoupled gas burner. The method specifically includes the following steps:

[0106] (I) The central gas is sprayed into the furnace through the central gas pipe 8, and the primary air introduced by the primary air channel enters the furnace through the primary wind swirl blade 9, and the central gas and the primary air are mixed and initially burned in the furnace;

[0107] Center gas accounts for 32% of the total gas volume of the decoupled gas burners. The first-level wind includes central outer circulation flue gas and central air. The volume ratio of the central outer circulation flue gas to the total air volume of the decoupled gas burner is 3% under standard conditions, and the central air volume accounts for 3% of the decoupled gas burner. 10% of the total air volume.

[0108] (II) The gas in the air chamber 19 enters the secondary air channel to form the secondary air, and the secondary air is divided into two stre...

Embodiment 3

[0113] This embodiment provides a method for using a decoupled gas burner. The method specifically includes the following steps:

[0114] (I) The central gas is sprayed into the furnace through the central gas pipe 8, and the primary air introduced by the primary air channel enters the furnace through the primary wind swirl blade 9, and the central gas and the primary air are mixed and initially burned in the furnace;

[0115] Center gas accounts for 44% of the total gas volume of decoupled gas burners. The first-level wind includes the flue gas outside the center and the central air. The volume ratio of the flue gas outside the center to the total air volume of the decoupled gas burner is 5% under standard conditions, and the central air accounts for 5% of the total air volume of the decoupled gas burner. 15% of the total air volume.

[0116] (II) The gas in the air chamber 19 enters the secondary air channel to form the secondary air, and the secondary air is divided into t...

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Abstract

The invention provides a decoupling gas burner and its use method. The decoupling gas burner includes a central gas pipe arranged coaxially, a primary air cylinder body, a secondary air cylinder body and Outer cylinder body; an annular air chamber is formed between the outer cylinder body and the first-stage air cylinder body, and the end plate of the air chamber is arranged at the end of the air chamber near the furnace; At least one central gas injection hole is arranged on the outer peripheral surface of the pipe end cover; an annular primary air passage is formed between the central gas pipe and the primary air cylinder body, and the end of the primary air passage near the furnace is provided with a primary wind swirl blade; A secondary air channel is formed between the primary air cylinder body and the secondary air cylinder body. The end of the secondary air channel near the furnace is provided with a secondary wind swirl blade, and the end of the secondary air channel is far away from the furnace and connected to the ventilation chamber. The invention adopts a new staged combustion method to reduce thermal NO while ensuring combustion efficiency x generation.

Description

technical field [0001] The invention belongs to the technical field of combustion equipment, and relates to a gas burner and its usage method, in particular to a decoupling gas burner and its usage method. Background technique [0002] For gas that does not contain fuel nitrogen or has low fuel nitrogen content, the method of increasing the excess air coefficient can be used to reduce the combustion temperature, so as to control the thermal NO x generation. However, due to the relatively concentrated injection of gas into the air flow, when the gas is mixed with air at the initial stage of combustion, there will be a transition zone where the stoichiometric ratio of gas and oxygen is close, resulting in the generation of thermal NO at local high temperatures. x , unable to achieve ultra-low emissions. In addition, if the excess air is too large, it will also increase the heat loss of the exhaust gas and the power consumption of the fan, and reduce the energy efficiency. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C5/32F23C7/00
CPCF23C5/32F23C7/004
Inventor 郝江平高士秋余剑李长明刘周恩赵康
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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