Oxygen-enriched combustion system and method
A technology of oxygen-enriched combustion and oxygen concentration, which is applied in the direction of combustion methods, controlled combustion, and combustion equipment. It can solve problems such as spontaneous combustion, acid gas condensation corrosion, etc., and achieve the goals of improving safety, preventing spontaneous combustion of coal powder, and prolonging service life. Effect
Active Publication Date: 2015-12-16
CHINA SHENHUA ENERGY CO LTD +3
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Problems solved by technology
[0005] The purpose of the present invention is to provide a more complete oxygen-enriched combustion system to solve the problem of acid gas condensation and corrosion in the coal pulverizer in the prior art, and at the same time to overcome the problem of the pulverized coal in the coal pulverizer in the prior art The problem of spontaneous combustion during the shutdown process
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[0037] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0038] In the present invention, in the case of no contrary description, the used orientation words such as "up, down, left and right" usually refer to the up, down, left and right shown in the accompanying drawings; "inside and outside" Refers to the inside and outside of the outline of each part itself.
[0039] The present invention is based on the problem of acid gas condensation and corrosion in the coal mill in the oxygen-enriched combustion system in the prior art and the problem of spontaneous combustion of coal powder in the coal mill during the shutdown process. The following will refer to the attached The drawings illustrate the present invention in ...
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The invention relates to the field of oxygen-enriched combustion, and discloses an oxygen-enriched combustion system and method. The oxygen-enriched combustion system comprises a boiler (101) and a coal mill (104). An inlet of the boiler (101) is communicated with an outlet of the coal mill (104). The oxygen-enriched combustion system is characterized in that the temperature of mixed gas entering the coal mill (104) is higher than the moisture condensation temperature of acid gas in the coal mill (104); and the oxygen concentration of the mixed gas entering the coal mill (104) is lower than the critical value of the oxygen concentration of the mixed gas causing detonation of coal powder and / or combustible gas in the coal mill (104). According to the oxygen-enriched combustion system, moisture condensation corrosion of the acid gas in the coal mill (104) can be prevented, and meanwhile the problem of spontaneous combustion of coal powder in the coal mill (104) in the boiler shutdown process can be effectively prevented. The equipment running safety is improved, and the service life of equipment is prolonged.
Description
technical field [0001] The present invention relates to oxygen-enriched combustion technology, in particular to an oxygen-enriched combustion system and method. Background technique [0002] With the development of human industry, the issue of climate change has attracted global attention. Although there are still different debates on the causes of climate warming, most theories believe that it is related to the increase in the concentration of the greenhouse gas carbon dioxide (CO2) produced by human activities. related. Because of this, the oxygen-enriched combustion technology (oxygen-enriched combustion technology is based on the existing coal-fired power generation technology, replaces air with an appropriate proportion of oxygen and carbon dioxide mixture, and uses flue gas circulation to adjust the combustion and heat transfer characteristics of the boiler to Obtaining high-concentration carbon dioxide flue gas, through condensation compression purification, a combus...
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IPC IPC(8): F23C9/00F23C7/00F23N3/00F23L7/00F23L15/00
CPCY02E20/34
Inventor 傅培舫张翼石朝夕王慧芳张金生王鹏钟晨曦
Owner CHINA SHENHUA ENERGY CO LTD