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Decoupled gas combustor and application method thereof

A gas burner, decoupling technology, applied in the direction of combustion method, burning with multiple fuels, burning with block fuel and gaseous fuel, etc., can solve problems such as not easy to burn out, poor mass transfer, and decreased combustion efficiency. Achieve the effects of enhanced cooling, reduced concentration, reduced flow and wind pressure

Active Publication Date: 2020-05-08
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, the staged combustion and the large amount of flue gas (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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  • Decoupled gas combustor and application method thereof
  • Decoupled gas combustor and application method thereof
  • Decoupled gas combustor and application method thereof

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] (1) center gas is sprayed into the furnace through center gas pipe 8, and the primary wind introduced by the primary air channel enters the furnace through the primary wind swirl blade 9, and the central gas and primary air mix and burn initially 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 air is divided into tw...

Embodiment 2

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

[0106] (1) center gas is sprayed into the furnace through center gas pipe 8, and the primary wind introduced by the primary air channel enters the furnace through the primary wind swirl blade 9, and the central gas and primary air mix and burn initially 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 streams, one of which ent...

Embodiment 3

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

[0114] (1) center gas is sprayed into the furnace through center gas pipe 8, and the primary wind introduced by the primary air channel enters the furnace through the primary wind swirl blade 9, and the central gas and primary air mix and burn initially 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 two streams, one of wh...

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Abstract

The invention provides a decoupled gas combustor and an application method thereof. The decoupled gas combustor successively comprises a center gas pipe, a primary air duct body, a secondary air ductbody and an outer duct body which are coaxially arranged from inside to outside. An annular air chamber is formed between the outer duct body and the primary air duct body, and an air chamber end plate is arranged at the end, close to a hearth, of the air chamber; a cone-shaped center gas pipe end cover is arranged at the end, close to the hearth, of the center gas pipe, and at least one center gas spray hole is formed in the peripheral surface of the center gas pipe end cover; an annular primary air channel is formed between the center gas pipe and the primary air duct body, and a primary airrotational flow blade is arranged at the end, close to the hearth, of the primary air channel; a secondary air channel is formed between the primary air duct body and the second air duct body, a secondary air rotational flow blade is arranged at the end, close to the hearth, of the secondary air channel, and the end, far away from the hearth, of the secondary air channel communicates to the air chamber. By adopting a novel graded combustion manner, generation of heating power type NOx is reduced under a circumstance of guaranteeing the combustion efficiency.

Description

technical field [0001] The invention belongs to the technical field of combustion equipment, and relates to a gas burner and its use method, in particular to a decoupled gas burner and its use method. Background technique [0002] For gas without fuel nitrogen or with 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. [0003] Mixing ext...

Claims

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Application Information

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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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