NOVELTY - Fuel ethanol is prepared by separating acorn kernel shell, carbonizing and activating shell to obtain activated carbon and produce wood vinegar and syngas, using activated carbon to treat wastewater produced from ethanol preparation, using syngas for power generation and steam production for use in ethanol production process, crushing acorn core, adding ethanol, extracting, performing solid-liquid separation, extracting oil and tannins from liquid phase, drying solid phase, forming emulsion using solid phase, liquefying, saccharifying, and fermenting to produce ethanol.    USE - Preparation of fuel ethanol (claimed).    ADVANTAGE - Preparation of fuel ethanol is environment-friendly and simple, saves energy, and reduces production cost.    DETAILED DESCRIPTION - Fuel ethanol is prepared by separating acorn kernel shell, carbonizing and activating shell to obtain activated carbon and produce wood vinegar and syngas, using activated carbon to treat wastewater produced from ethanol preparation, using syngas for power generation and steam production for use in ethanol production process, crushing acorn core, adding ethanol, extracting, performing solid-liquid separation, extracting oil and tannins from liquid phase, drying solid phase, forming emulsion using solid phase, liquefying, saccharifying, fermenting to produce ethanol, distilling ethanol fermentation liquid to obtain anhydrous ethanol, condensate, and bottoms liquid, using condensate in emulsion formation, filtering bottoms liquid, drying filter residue, preparing dried distillers grains with solubles (DDGS), sending filtrate to environmental protection device, and post-treating using biochemical processes and activated carbon.    DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart for the preparation of fuel ethanol. (Drawing includes non-English language text).    Acorn kernel shell separation (1)    Extracting oil and tannins (2)    Carbonizing acorn shell (3)    Activating coke (4)    Electricity and steam production (5)