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Oxygen-enrichment combustion assisting method of oxygen enrichment device of combustor of cement decomposing furnace

A cement decomposition furnace, oxygen-enriched combustion-supporting technology, applied in the direction of combustion method, combustion air/fuel supply, control of combustion, etc., can solve the problems of large coal consumption, large amount of coal, and increased exhaust gas discharge of the decomposition furnace. Achieve the effects of complete fuel combustion, lower coal ignition point, and higher combustion speed

Inactive Publication Date: 2014-09-10
河南嘉和节能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coal-fired cement kiln with high energy consumption of the cement kiln decomposition furnace has a problem that the burner of the cement kiln decomposition furnace burns a huge amount of coal; due to the reduction of coal resources, low-quality coal with a low combustion rate is also used in large quantities in the decomposition furnace. The coal consumption of the calciner is large, and the exhaust gas emission is also increased

Method used

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  • Oxygen-enrichment combustion assisting method of oxygen enrichment device of combustor of cement decomposing furnace
  • Oxygen-enrichment combustion assisting method of oxygen enrichment device of combustor of cement decomposing furnace

Examples

Experimental program
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Effect test

Embodiment 1

[0020] As shown in the figure; an oxygen-enriching device for a burner of a cement decomposition furnace is composed of a kiln tail outer pipe 1, a kiln tail outer air inlet pipe 2, a kiln tail pulverized coal air flow pipe 3, a kiln tail coal air pipe 4, Kiln tail oxygen-enriched air channel 5, kiln tail refractory concrete 6, kiln tail air inlet pipe 7, kiln tail internal air pipe 8; cement calciner burner oxygen-enrichment device is equipped with four pipes, pipe-in-pipe coaxial arrangement: The kiln tail central pipe 8 is provided with a kiln tail coal wind pipe 4, and the kiln tail coal wind pipe 4 is provided with a kiln tail outer layer pipe 1, and the kiln tail outer layer pipe 1 is provided with a kiln tail refractory concrete 6; one end of each pipe is connected to the kiln tail The outlet of the internal air duct 8 is arranged flush, which is the total outlet of the kiln tail; the tail end of the kiln tail internal air duct 8 constitutes the inlet, and the kiln tail ...

Embodiment 2

[0022] The kiln tail oxygen-enriched air channel 5 is set between the kiln tail outer layer air inlet pipe opening 2 and the kiln tail air inlet pipe port 7, and the kiln tail oxygen-enriched air duct 5 pipe end in the kiln tail outer layer air inlet pipe port 2 is reserved Oxygen-enriched air inlet; an oxygen-enriched delivery pipe mouth is arranged on the kiln tail internal air duct 8 .

Embodiment 3

[0024] The enriched oxygen with a concentration of 23% to 50% passes through the air inlet of the kiln tail oxygen-enriched air channel 5 in the outer layer of the kiln tail air inlet pipe 2, and the enriched oxygen enters the kiln tail air inlet pipe 7 through the kiln tail oxygen-enriched air duct 5 , enter the kiln tail internal air duct 8 through the kiln tail air inlet pipe 7, and enter the cement decomposition furnace through the outlet of the kiln tail internal air duct 8; at the same time, the air flow of coal powder is input into the cement decomposition furnace through the kiln tail coal air duct 4. powder; the concentration of the inner air duct 8 at the kiln tail is 23% to 50%, and the oxygen-enriched internal air flow is fully mixed with the pulverized coal air flow at the outlet. The high temperature of 1300 ℃ in the field, the oxygen-enriched and pulverized coal air flow burns rapidly, and after the temperature of the combustion field can be increased by 450 ℃, t...

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Abstract

The invention relates to an oxygen-enrichment combustion assisting method of an oxygen enrichment device of a combustor of a cement decomposing furnace. The oxygen-enrichment combustion assisting method is characterized in that the oxygen enrichment device comprises a kiln tail outer-layer pipeline, a kiln tail outer-layer air inlet pipe hole, a kiln tail coal powder airflow pipeline, a kiln tail coal air pipeline, a kiln tail oxygen enrichment air flue, kiln tail refractory concrete, a kiln tail air inlet pipe hole and a kiln tail inner air pipeline; enriched oxygen with the working concentration being 23%-50% enters the cement decomposing furnace after being mixed with coal powder airflow through an air inlet of the kiln tail oxygen enrichment air flue in the kiln tail outer-layer air inlet pipe hole, the enriched oxygen and the coal powder airflow rapidly burn in a combustion site in the cement decomposing furnace at a high temperature of 1300 DEG C, and then the temperature of the combustion site can reach above 1700 DEG C; free carbon in the combustion site with the temperature above 1700 DEG C thoroughly burn before black smoke is formed and can be changed into a combustible fuel; meanwhile, a clinker catalyst of cement can be oxidized and combusted due to the input of the enriched oxygen; when the temperature of the combustion site is above 1700 DEG C, CO in the combustion site is combusted, and the emission of NOx is reduced by 35%.

Description

technical field [0001] The invention relates to a coal-fired burner device for a cement kiln, in particular to an oxygen-enriched combustion-supporting method for an oxygen-enriched device for a cement decomposition furnace burner. Background technique [0002] The three-channel and multi-channel calciner burners use the jet flow method composed of direct current and swirl flow to strengthen the pulverized coal combustion process. The swirling flow of the internal wind can cause internal backflow in the center, so as to entrain high-temperature smoke. In the initial stage, the rotating jet has high turbulence intensity, strong mixing, and rapid momentum and heat transfer. Coal and wind are transported at high pressure, with high concentration of pulverized coal, low flow velocity, and small air volume. In this way, the heat required for ignition is relatively small, so it has good ignition performance; the external air adopts DC wind, and the early turbulence intensity of D...

Claims

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Application Information

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IPC IPC(8): F23C7/00F23L1/00F23N1/02
CPCY02E20/34
Inventor 葛中伟王政伟朱洪涛
Owner 河南嘉和节能科技有限公司
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