Generation method for converting agricultural waste into solid fuel and prepared solid fuel

Abstract

The invention discloses a generation method for converting agricultural waste into a solid fuel. The generation method comprises the following steps: (1) drying: drying the agricultural waste until the average moisture content is between 18 and 30 percent; (2) crushing and stirring: crushing and stirring the dried agricultural waste to form small granular powder bodies; (3) adding an additive: adding a clay-contained additive into the crushed and stirred agricultural waste; and (4) performing extrusion forming: forming the agricultural waste which is added with the clay-contained additive into a blocky solid fuel by using the extrusion forming, wherein the temperature is between 150 and 210 DEG C and the pressure is between 300 and 600 Psi/cm<2> during the extrusion forming. The invention also discloses the solid fuel prepared by using the generation method for converting the agricultural waste into the solid fuel, and the solid fuel has the advantages of environmental protection and high safety.

Description

technical field [0001] The invention relates to a method for converting agricultural waste into solid fuel and the solid fuel produced, in particular to drying, pulverizing, and After stirring and adding additives, it is extruded into block solid fuel. Background technique [0002] At present, it is estimated that the annual production of agricultural waste in Taiwan is about 6 million metric tons. In the early days, these agricultural wastes were directly burned and buried on the farmland by farmers. In addition to being used as compost or incineration for agricultural land, many researchers are also committed to converting these huge agricultural wastes into more valuable solar biomass energy. For example, the Institute of Nuclear Energy in Taiwan began to develop local Biomass fiber raw materials, that is, agricultural waste such as rice straw, bagasse, miscanthus, etc., are converted into fuel alcohol, added to gasoline, and supplied to vehicles as alternative fuels, bu...

AI Technical Summary

Problems solved by technology

[0002] At present, it is estimated that the annual production of agricultural waste in Taiwan is about 6 million metric tons. In the early days, these agricultural wastes were directly burned and buried on the farmland by farmers. In addition to being used as compost or incineration for agricultural land, many researchers are also committed to converting these huge agricultural wastes into more valuable solar biomass energy. For example, the Institute of Nuclear Energy in Taiwan began to develop local Biomass fiber raw materials, that is, agricultural waste such as rice straw, bagasse, miscanthus, etc., are converted into fuel alcohol, added to gasoline, and supplied to vehicles as alternative fuels, but this technology is complex and requires a lot of electricity, Energy such as gas, water and steam are not yet competitive with current energy prices

[0003] Therefore, the literature points out that solid waste-derived fuel is a process in which biomass or waste is crushed, sorted, dried, mixed with additives, and formed before heat conversion to make solid ingot-shaped fuel, and it is mentioned that the Biomass can be rice husk, bagasse, bean pods or corn cobs of agricultural waste, but if the water content of the agricultural biomass waste is too high, it is easy to mold and difficult to preserve, and if the water content is too high, it is not easy to store. It is easy to burn and consumes energy to evaporate the water. If it is used in a boiler, a large amount of water vapor will cause corrosion and oxidation of the mechanism. The white mist generated by the water vapor will easily cause the public to mistake it as a polluting gas. However, if the water content is too low, it will not be easy to form. , and it is easy to break due to shaking during transportation, and the general additives are chemical organic polymers (such as paraffin or polyethylene, etc.) to provide better bonding effect, but this chemical organic polymer will produce Toxic gas is harmful to the environment and organisms. Therefore, in order to solve the above problems, it is urgent for researchers to study and propose the optimal water content of the agricultural waste and the molding temperature and pressure of solid-state molding, and provide more natural additives.

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