Mixed fuel of biomass and clean coal

Abstract

The invention relates to mixed fuel of biomass and clean coal. The mixed fuel is prepared from the following raw materials: 40-50% of biomass powder, 40-50% of the clean coal and 5-10% of calcium lignosulphonate; a processing method of the mixed fuel comprises the following steps: evenly mixing the biomass powder with particle size of 0.1-0.5cm, the clean coal powder with particle size of 50-100 meshes and calcium lignosulphonate powder in a mixer according to a ratio, and enabling the mixture to enter a biological forming machine for extruding into granules, wherein the granule density is 1.1-1.3t / m<3>, and the granule size is 0.6-1.0. Compared with the prior art, the mixed fuel can complement the defects of two types of major energy, i.e., the biomass and the coal. The combustion exhaustgas contains 29mg / m<3> of particulate matters, 50mg / m<3> of sulfur dioxide and 210mg / m<3> of nitrogen oxides, the blackness of flue gas is less than or equal to 1, the concentration of particulate matters is slightly higher than that of natural gas, and is lower than those of the coal and fuel oil; sulfur dioxide meets natural gas emission standards; the concentration of the nitrogen oxides is slightly higher than that natural gas, and is lower than those of the coal and the fuel oil.

Description

technical field [0001] The invention relates to a fuel, especially a mixed fuel of biomass and clean coal. Background technique [0002] With the development of the economy, the demand for energy is increasing. Due to the extensive use of fossil energy, serious air pollution has been caused. Biomass energy is the energy form of solar energy stored in biomass in the form of chemical energy. Biomass has the characteristics of high volatile matter, low N and S content, and low ash content. Its combustion process has CO 2 With the feature of zero emission, some of them are currently used as biomass boilers. However, the calorific value of biomass briquette fuel is low, generally between 3000 kcal and 4000 kcal; it contains high alkali metal oxides and salts, and when biomass is directly fired in a special boiler, it is easy to cause ash accumulation and sintering in the furnace , and cause corrosion to the boiler body; the effect is not very ideal. Therefore, it is a techni...

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Problems solved by technology

However, the calorific value of biomass briquette fuel is low, generally between 3000 kcal and 4000 kcal; it contains high alkali metal oxides and salts, and when biomass is directly fired in a special boiler, it is easy to cause ash accumulation and sintering in the furnace , and cause corrosion to the boiler body; the effect is not very ideal

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