Low-nitrogen-source pure oxygen combustion method

A combustion method, pure oxygen technology, applied in the combustion method, the use of a variety of fuel combustion, combustion types and other directions, can solve the problems of high emission concentration, high CO combustion emission concentration, complex denitration system, etc., to reduce CO emission concentration, The effect of reducing environmental protection investment and improving thermal energy conversion efficiency

Inactive Publication Date: 2018-05-11
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the worldwide problems existing in the existing low-nitrogen combustion technology, such as high NOx combustion emission concentration, high CO combustion emission concentration, and complex denitrification system, the present invention provides a low-nitrogen pure oxygen combustion technology to eliminate or reduce fuel from the source Type NOx and thermal NOx, using pure oxygen combustion, realize deep burnout of fuel, greatly reduce CO emission concentration, realize ultra-low NOx and ultra-low CO combustion emissions, no need for flue gas denitrification system, not only realize clean combustion, It is a subversive clean combustion technology that burns out the fuel and does not require huge investment in environmental protection facilities.

Method used

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  • Low-nitrogen-source pure oxygen combustion method

Examples

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Effect test

Embodiment 1

[0021] Example 1 Denitrification of pulverized coal using CO 2 The protection is transported through the low-nitrogen fuel pipeline 1, and the pure oxygen is transported through the pure oxygen transmission pipeline 2, and the stoichiometric ratio of pure oxygen / denitrification pulverized coal is 1 times. Pure oxygen and denitrified coal powder are sprayed into the combustion chamber 3 through the burner 4 to perform four-corner tangential pure oxygen combustion to generate a combustion flame 5 . The NOx emission concentration measured at the combustion flue gas outlet 6 is 5 mg / m 3 , CO emission concentration is 500mg / m 3 , The combustion efficiency is 95.1%. No flue gas denitrification system is required.

Embodiment 2

[0022] Example 2 Denitrification of pulverized coal using CO 2 The protection is transported through the low-nitrogen fuel pipeline 1, and the pure oxygen is transported through the pure oxygen transmission pipeline 2. The stoichiometric ratio of pure oxygen / denitrification coal powder is 1.1 times. Pure oxygen and denitrified coal powder are sprayed into the combustion chamber 3 through the burner 4 to perform four-corner tangential pure oxygen combustion to generate a combustion flame 5 . The NOx emission concentration measured at the combustion flue gas outlet 6 is 10mg / m 3 , CO emission concentration is 450mg / m 3 , The combustion efficiency is 95.5%. No flue gas denitrification system is required.

Embodiment 3

[0023] Example 3 Denitrification of pulverized coal using CO 2 The protection is transported through the low-nitrogen fuel pipeline 1, and the pure oxygen is transported through the pure oxygen transmission pipeline 2. The stoichiometric ratio of pure oxygen / denitrification coal powder is 1.15 times. Pure oxygen and denitrified coal powder are sprayed into the combustion chamber 3 through the burner 4 to perform four-corner tangential pure oxygen combustion to generate a combustion flame 5 . The NOx emission concentration measured at the combustion flue gas outlet 6 is 15 mg / m 3 , CO emission concentration is 400mg / m 3 , The combustion efficiency is 96%. No flue gas denitrification system is required.

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Abstract

The invention belongs to the field of thermal power engineering and discloses a low-nitrogen-source pure oxygen combustion method. According to the method, low-nitrogen fuel is adopted, pure oxygen isused as combustion-supporting gas, the pure oxygen and the low-nitrogen fuel are conveyed separately, the ratio between the pure oxygen and the low-nitrogen fuel is controlled, four corner tangentialpure oxygen combustion is carried out in a combustion chamber, deep burnout of the low-nitrogen fuel is achieved, and thus the emission concentrations of CO and NOx are reduced. According to the low-nitrogen-source pure oxygen combustion method, pre-combustion nitrogen source reduction is achieved, NOx is completely eradicated or reduced from the source, and fuel heat energy conversion efficiencyis improved; and no fuel gas denitrification device is needed, the NOx combustion emission concentration is 5-100 mg / m<3>, the CO combustion emission concentration is 50-500 mg / m<3>, and combustion efficiency is 95% or above.

Description

technical field [0001] The invention relates to a low-nitrogen source pure oxygen combustion method, which belongs to the field of thermal energy engineering. Background technique [0002] Nitrogen oxides (NOx) produced by combustion are one of the main pollutants in the atmosphere. There are two main types of NOx formation in the combustion process: one is the fuel type, that is, nitrogen-containing fuel generates NOx during the combustion process; the other is the thermal type, that is, nitrogen in the combustion-supporting gas reacts with oxygen to generate NOx at high temperature. At present, the main ways to control NOx emissions are low-nitrogen combustion technology and flue gas denitrification technology. The concentration of thermal NOx is positively correlated with the combustion temperature exponentially. Therefore, the existing low-nitrogen combustion technology mainly reduces the generation of thermal NOx as much as possible by controlling the combustion tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C5/32F23K3/02F23L7/00
CPCF23C5/32F23K3/02F23L7/007Y02E20/34F23L2900/07005
Inventor 张深根黎琳刘波张柏林
Owner UNIV OF SCI & TECH BEIJING
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