Biomass fuel anti-coking additive

A biomass fuel and biomass raw material technology, applied in the direction of fuel, solid fuel, petroleum industry, etc., can solve the problems of low ash melting point, low fuel utilization rate and combustion efficiency, corrosion of combustion equipment, etc., to solve coking and improve fuel efficiency. Utilization rate and combustion efficiency, effect of increasing ash melting point

Inactive Publication Date: 2014-08-06
JIANGSU DONGDA THERMAL ENERGY MACHINERY MFG
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to aim at the low ash melting point of biomass solid briquette fuel currently produced with straw as raw material, which leads to easy coking of biomass fuel during combustion, corrosion of combustion equipment, low heat transfer efficiency, low fuel utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: Anti-coking additives for biomass fuels such as cotton stalks and larch

[0015] Cotton straw, larch and other raw materials contain relatively low Si and other alkali metal elements. The Si content is basically below 10%, the K content is about 4%, and the coking rate after combustion is low. This anti-coking additive is mainly used for Improve the combustion characteristics of briquette fuels, so the anti-coking additives used for cotton stalks, larch and other biomass fuels are composed of 20% alumina, 15% magnesium carbonate and 65% calcium oxide uniformly mixed in a dry container. And use according to 2% of the total weight of biomass raw materials. After combustion, the ash content of the fuel was analyzed. Compared with the control group (without additives), the coking rate of the cotton straw pellet fuel dropped from 21% to 5%, and the ash melting point reached 1260°C; the coking rate of the larch straw pellet fuel decreased from 9%. Dropped to 1%, t...

Embodiment 2

[0016] Example 2: Anti-coking additives for biomass fuels such as wheat straw and rice straw

[0017] Raw materials such as wheat straw and rice straw contain generally high Si elements and other alkali metal elements. The Si content is basically about 20%, and the K element content is about 10%. The coking rate after combustion is high, so it is used for wheat straw, rice The anti-coking additive for biomass fuels such as stalks is composed of 25% alumina, 25% magnesium carbonate and 50% calcium oxide uniformly mixed in a dry container by weight percentage, and is added according to 5% of the total weight of biomass raw materials. After combustion, the ash content of the fuel was analyzed. Compared with the control group (without additives), the coking rate of the wheat straw pellet fuel dropped from 32% to 11%, and the ash melting point reached 1290°C; the coking rate of the larch straw pellet fuel decreased from 22% Dropped to 3%, the ash melting point reached 1340°C. Comb...

Embodiment 3

[0018] Example 3: Anti-coking additives for biomass fuels such as corn stalks and Korean pine

[0019] Corn stalks, Korean pine and other raw materials contain relatively high Si elements and other alkali metal elements. The Si content is basically about 25%, the K element content is about 15%, and the coking rate after combustion is the highest. The anti-coking additive for biomass fuel is composed of 30% aluminum oxide, 30% magnesium carbonate and 40% calcium oxide uniformly mixed in a dry container by weight percentage, and added according to 8% of the total weight of biomass raw materials. After combustion, the ash content of the fuel was analyzed. Compared with the control group (without additives), the coking rate of the corn stalk pellet fuel decreased from 47% to 14%, and the ash melting point reached 1380°C; the coking rate of the Korean pine pellet fuel decreased from 53%. To 17%, the ash melting point reaches 1540°C. Combustion efficiency increased by about 6%.

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Abstract

The invention belongs to the field of renewable energy technology, and discloses a biomass fuel anti-coking additive used to solve the problems of high alkali metal content and easy coking during combustion of straw biomass briquette. The biomass fuel anti-coking additive of the invention is mainly composed of 20-30% of alumina, 15-30% of magnesium carbonate and 40-65% of the calcium oxide; and the usage amount of the additive is 2-8 wt.% of the total biomass raw materials. The biomass fuel anti-coking additive of the invention can increase the ash melting point of the biomass briquette, thus solving the problem of coking of biomass solid briquette in the combustion process and improving the utilization rate of straw fuel.

Description

technical field [0001] The invention belongs to the technical field of renewable energy, and in particular discloses an anti-coking additive for biomass fuel. technical background [0002] my country is rich in crop straw resources. With the improvement of rural living standards, a large amount of straw is burned in the fields, which not only wastes biomass energy, but also causes environmental pollution. The preparation of crop straw resources into biomass solid briquettes can improve the utilization rate of biomass resources and reduce environmental pollution. The calorific value of biomass fuel is close to that of coal. It has the advantages of easy storage and transportation, convenient use, clean and environmental protection, and can replace coal and petroleum fuels. It has attracted more and more attention in recent years. [0003] However, the content of inorganic elements (including K, Na, S, Ca, Si, P, etc.) in the biomass fuel produced from straw is relatively hig...

Claims

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Application Information

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IPC IPC(8): C10L9/10
Inventor 朱复东贾树山柏林霞
Owner JIANGSU DONGDA THERMAL ENERGY MACHINERY MFG
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