Efficient reburning denitration mixed fuel made from solid wastes and preparation thereof

A solid waste and mixed fuel technology, applied in waste fuel, solid fuel, fuel, etc., can solve the problems of poor reburning effect, low volatile content of high-rank coal, limiting coal reburning and denitrification efficiency, etc., to reduce NOX pollution Emissions, saving effect of natural gas or pulverized coal

Inactive Publication Date: 2009-05-27
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reburning and denitrification effect of natural gas is very good, but its price is relatively high considering economic factors, and it is difficult to reach the inside of the reaction zone in a large furnace
Bituminous coal, lignite and other low-rank coals with high volatile content are used as reburning fuels, and the denitrification effect in the reburning section is close to that of natural gas. High-rank coals have poor reburning effects due to their low volatile content.
The secondary oxidation of coal coke nitrogen also limits the further improvement of the denitrification efficiency of pulverized coal reburning

Method used

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  • Efficient reburning denitration mixed fuel made from solid wastes and preparation thereof
  • Efficient reburning denitration mixed fuel made from solid wastes and preparation thereof
  • Efficient reburning denitration mixed fuel made from solid wastes and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1As shown, the experimental results of denitrification characteristics of waste tire powder and biomass waste under typical reburning conditions and the comparison with the reburning results of natural gas under the same conditions. The results show that in the reburning process, waste tire powder and biomass waste have the same effect as natural gas on reburning and denitrification, and can effectively convert NO. The optimal stoichiometric ratio SR2 in the reburning section is 0.9-0.95.

Embodiment 2

[0035] Such as figure 2 As shown, the denitrification efficiency of the mixed fuel 1 composed of waste tire rubber powder and lignite ash is compared with the denitrification efficiency of natural gas under the same conditions. The results show that in a typical two-stage denitrification process of reburning and embering, the denitrification efficiency of waste tire rubber powder and lignite ash collected by bag filter is as good as that of natural gas under the same conditions, exceeding 80%.

Embodiment 3

[0037] Such as figure 2 As shown, the denitrification efficiency of the mixed fuel 2 composed of waste tire rubber powder, biomass ash, biomass minerals, etc. is compared with the denitrification efficiency of natural gas under the same conditions. The results show that in a typical two-stage denitrification process of reburning and embering, when the feed rate of biomass ash is less than 0.05g / min, the denitrification efficiency of the mixed fuel composed of waste tire rubber powder and biomass ash is comparable to that of natural gas under the same conditions. The efficiency is as good as over 70%. .

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Abstract

The invention relates to a solid waste high-efficiency reburning denitration blended fuel and a method for preparing the same. The blended fuel comprises main fuel of used tire rubber powder, various biomass waste materials, power plant brown coal ash, biomass ash, biomass minerals, and iron oxide (Fe2O3) which are matched at appropriate parameters to be used as reburning fuels. The blended fuel can eliminate as high as more than 80 percent of nitrogen oxides (NOX) generated in the process of coal burning to convert the nitrogen oxides into nitrogen so as to achieve the aim of reducing the emission of nitrogen oxide pollutants, and the solid waste energy sources are recycled effectively and simultaneously.

Description

technical field [0001] The invention belongs to the field of reburning fuel, in particular to a high-efficiency reburning and denitrification mixed fuel of solid waste and its preparation. Background technique [0002] Nitrogen oxides (NOX) are an important polluting gas produced during the coal combustion process, which is discharged into the atmosphere and causes serious pollution of the atmosphere. my country is a country with coal as the main primary energy source, NO X Emission control is very important to maintain a high-quality atmospheric environment in our country. With the rapid development of the economy, the demand for electricity increases, and the NO of coal-fired boilers in my country X total emissions are increasing. For thermal power SO 2 my country has begun to carry out effective control of emissions, but for flue gas NO X emissions control is still in its infancy. NO of the unit power generation in my country in 2002 X The emission level is much hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/04C10L5/40
CPCY02E50/30
Inventor 苏亚欣
Owner DONGHUA UNIV
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