A method for pulping and papermaking using distiller's grains from sweet sorghum stalks

Abstract

The invention discloses a method for making pulp and paper by using distiller's grains from sweet sorghum stalks. This method includes four steps. The first step is ethanol fermentation and distillation: take 16 tons of sweet sorghum stalks with a water content of 70%, grind them through a grinder, add the cultured yeast seed liquid at a ratio of 15% (v / m), and carry out Ethanol fermentation and distillation to obtain 1 ton of ethanol with a mass fraction of 95% and 16 tons of hot distiller's grains with a water content of 80% at a temperature of 94°C; in the second step, the hot distiller's grains are directly sent to a disc refiner for fiber separation and broom 14 tons of slurry with a water content of 85% are obtained, the disc grinding distance is 0.002m, and the refining concentration is 20% (w / w). In the third step, 2.1 tons of waste paper pulp boards are decomposed by a fiber decomposer and then sent to the Valley beater Beat the pulp to 36oSR to obtain 10.5 tons of slurry with a water content of 80%. In the fourth step, the distiller's grain fiber pulp obtained in the second step and the waste paper pulp obtained in the third step are mixed in a ratio of 1:1 to make paper to obtain 4.2 tons of base paper. The invention is used for the pulping and papermaking of distiller's grains from sweet sorghum stalks.

Description

technical field [0001] The invention relates to a method for making pulp and paper by using distiller's grains from sweet sorghum stalks. Background technique [0002] In today's rapidly growing population, rapidly decreasing arable land area, rapidly increasing car ownership, and increasing shortage of petroleum energy, the development of renewable new energy is particularly important. Under the call of national policies, the biofuel ethanol industry has developed rapidly. In order to meet the requirements of "not competing with people for food, not competing with food for land, and not damaging the environment", biofuel ethanol has been produced by the first generation of grain-based raw materials. Technology is developing rapidly in the direction of using "non-grain" as raw materials. Among them, sweet sorghum is a very valuable raw material. As a crop that harvests both grain and sugar, it has the characteristics of high photosynthetic efficiency, high biological consta...

AI Technical Summary

Problems solved by technology

[0004] Most of the traditional straw papermaking pulping methods need to strengthen alkali and other chemical agents to be prepared by high temperature and high pressure cooking. The pulp yield is low (about 30%), and the lignin, hemicellulose, fruit Glue etc. are dissolved in water, producing a large amount of dark night with extremely high COD and residual alkali

The technical difficulty of treating this kind of wastewater is high, the consumption cost is high, and the economic benefit of the enterprise is poor.

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