Acid-free pre-hydrolysis enzymolysis-free method for preparing bamboo pulp of Dendrocalamus giganteus Munro series

Abstract

The invention relates to an acid-free pre-hydrolysis enzymolysis-free method for preparing bamboo pulp of dedrocalamus giganteus manro series, which comprises the following steps: dedrocalamus giganteus manro series raw material which is free from mildew and being damaged by worms is spliced and removed with the bamboo joint to be sent into a bamboo piece steaming cabin and to be steamed for 10 to 30 minutes at a low temperature without the acid medium; the steamed bamboo piece enters a boiling device to be cooked in sulfate to obtain the paper pulp which conforms to the quality requirement, the paper pulp is processed in the traditional procedures of washing, selection and screening to extract the black liquor which is recycled by adding alkaline, the pulp slag is mixed with conventionalpaper pulp boiling link or is ground to be sent into an alkaline furnace, and the good pulp is removed the lignin and is dissolved out the hemicelluous maximally within relevant set technological conditions according to the oxygen delignification, D1 - Eop - D2 or D1 - P - D2 blenching combination procedures so as to finally obtain the bamboo pulp. Not only the acid pre-hydrolysis or the high-temperature pre-hydrolysis procedures in the traditional preparation method of the bamboo pulp can be eliminated, but also the hemicelluous enzymolysis process with high cost can be prevented; moreover, the preparation rate of the bamboo pulp is improved to 38 to 39.7 percent, and the product consumption and the production cost can be obviously reduced while effectively ensuring the clean production.

Description

technical field [0001] The invention relates to a method for preparing dragon bamboo series bamboo pulp without acid prehydrolysis and without enzymatic hydrolysis. Background technique [0002] Pulp is a type of high-purity cellulose pulp with high cleanliness obtained from plant fiber raw materials through a series of lignin and semi-fiber treatments. As the most abundant natural renewable resource in nature, cellulose is inseparable from human social activities all the time. Especially in today's highly developed modern science and technology, cellulose and its derivative materials can penetrate almost everywhere. All-encompassing, such as rayon and rayon for textiles, cellophane, cellulose esters, cellulose ethers and other materials that are widely used are all based on pulp refined from plant fiber raw materials. [0003] As far as the classic technical route of pulp preparation is concerned, it mainly undergoes acid prehydrolysis of plant fiber raw materials to remov...

AI Technical Summary

Problems solved by technology

The technical route of this process has two major drawbacks: high pollution load of acid prehydrolysis waste liquid, difficult to deal with and low pulp yield of only 1 / 3. Restricts the healthy development of the pulp industry to a large extent

Later, although people incorporated hemicellulose enzymatic technology to replace the acid prehydrolysis process to prepare pulp, the use of expensive hemicellulase could not change the backward status of the high-input, low-output pulp preparation industry.

To seek a low-pollution process and obtain high output at the same time is the goal that the pulp preparation industry has been pursuing for a long time. However, people have not yet made important and substantive breakthroughs in this area, which has also become a constraint. Bottleneck in pulp industry development