CN-121976410-A - Method and production system for processing large-diameter bamboo wood slicing waste into paper pulp

CN121976410ACN 121976410 ACN121976410 ACN 121976410ACN-121976410-A

Abstract

The invention belongs to the technical field of bamboo processing, and provides a method and a production system for processing large-diameter bamboo slicing wastes into paper pulp. The method comprises the steps of pulping by taking slicing waste generated during slicing of large-diameter bamboo as a raw material to obtain paper pulp, wherein the included angle between a plane formed by the relative motion track between a slicing knife edge and the bamboo or a curved plane and internode bamboo fibers is 0-1 degree during slicing. When the method and the production system provided by the invention are adopted to carry out slicing on the large-diameter bamboo, the sliced waste (such as bamboo shavings, bamboo core barrels and bamboo fragments) generated in the bamboo slicing process can be used as high-value raw materials for preparing the paper pulp with longer fiber length (the average fiber length reaches 2 mm) while the sliced product (bamboo strips or bamboo fragments) meeting the specification requirements is obtained, so that the defect of the fiber raw materials in the paper industry is effectively relieved, and meanwhile, the utilization rate and economic benefit of the large-diameter bamboo raw materials are also effectively improved.

Inventors

GAN LIHUI
LIN LU
TANG XING

Assignees

厦门大学

Dates

Publication Date: 20260505
Application Date: 20260123

Claims (9)

1. A method for processing large-diameter bamboo wood slicing waste into paper pulp is characterized in that the paper pulp is obtained by pulping the slicing waste generated during slicing of the large-diameter bamboo wood, and the included angle between the plane formed by the relative motion track between a slicing knife edge and the bamboo wood or the curved plane and internode bamboo fibers is 0-1 degree during slicing.
2. The method for processing large-diameter bamboo slicing waste into paper pulp according to claim 1, wherein the bamboo is sliced longitudinally or transversely into bamboo strips or sheets, and the angle between the plane or curved plane formed by the relative motion track between the slicing knife and the bamboo and the internode bamboo fiber is 0-1 degree.
3. The method of processing large diameter bamboo wood slicing waste into pulp as claimed in claim 2, comprising the steps of: a) Sawing, namely transversely sawing moso bamboo to obtain bamboo tubes, bamboo heads and bamboo tails; b) Sorting, namely sorting the bamboo tubes, the bamboo heads and the bamboo tails obtained by sawing to obtain bamboo tubes with the length meeting the specification; c) Slicing, namely slicing the bamboo tube which accords with the length specification after sorting into bamboo strips longitudinally or transversely after large breaking and joint removal treatment, or directly slicing the bamboo tube which accords with the length specification into bamboo strips transversely, wherein the included angle between the plane formed by the relative motion track between the slicing knife edge and the bamboo or the slicing plane of the curved surface and internode bamboo fibers is 0-1 degree during slicing; d) Pulping, namely pulping by taking slicing wastes generated during slicing as raw materials to obtain paper pulp.
4. The method for processing large-diameter bamboo wood slicing waste into paper pulp according to claim 3, wherein the large breaking means longitudinally breaking the sorted bamboo tubes meeting the length specification into a plurality of bamboo sheets with bamboo joint spacers, and the joint removing means removing the bamboo joint spacers on the bamboo sheets with the bamboo joint spacers, so that the bamboo sheets without the bamboo joint spacers are obtained.
5. A production system used for the method for processing large-diameter bamboo wood slicing wastes into paper pulp according to any one of claims 1-5, which is characterized by comprising a slicing unit for slicing bamboo wood longitudinally or transversely into bamboo strips or bamboo chips and a pulping unit for pulping the slicing wastes generated by slicing to obtain paper pulp.
6. The production system according to claim 5, wherein the production system comprises a sawing unit, a large breaking unit and a joint removing unit, wherein the sawing unit is used for conducting transverse sawing treatment on bamboo to obtain bamboo tubes, bamboo heads and bamboo tails, the large breaking unit is used for longitudinally breaking the bamboo tubes into a plurality of bamboo sheets with bamboo joint spacers, the joint removing unit is used for removing the bamboo joint spacers on the bamboo sheets with the bamboo joint spacers to obtain bamboo sheets without the bamboo joint spacers, and the slicing unit is used for longitudinally or transversely planing the bamboo sheets obtained through joint removal into bamboo strips or transversely planing the bamboo tubes obtained through sawing into the bamboo sheets.
7. The production system according to claim 6, wherein the production system comprises a sorting unit, and the sorting unit comprises a sorting device for sorting sawn bamboo tubes, bamboo heads and bamboo tails to obtain bamboo tubes of a specification-compliant length, or for sorting sliced products and produced sliced waste.
8. The production system according to claim 6, wherein the production system comprises a post-processing unit for post-processing the sliced bamboo strips or sheets.
9. The production system according to claim 7, wherein the production system comprises a residue collection unit for collecting and processing bamboo joint spacers obtained by sorting the remaining bamboo heads and bamboo tails and the joint removing unit by the sorting unit.

Description

Method and production system for processing large-diameter bamboo wood slicing waste into paper pulp Technical Field The invention belongs to the technical field of bamboo processing, and relates to a method and a production system for processing large-diameter bamboo slicing wastes into paper pulp. Background The paper industry is an important basic industry of national economy, and has great effect on the substance civilization construction and the mental civilization construction of society. The paper industry is a raw material processing industry, and the consumption of raw materials is extremely large. The raw materials of the paper industry in China are mainly wood, however, wood resources in China are relatively short, and the requirements of the paper industry cannot be met. In order to develop the paper industry in China faster and better, researchers are actively developing non-wood papermaking fiber resources so as to relieve the shortage of the fiber raw materials in the paper industry in China. The bamboo resources in China are rich, the area of the bamboo forest reaches 752.7 ten thousand hm < 2 >, and more than 500 kinds of bamboo seeds are covered. Bamboo can be divided into large-diameter bamboo (bamboo diameter is usually more than 10 cm) and medium-small-diameter bamboo (bamboo diameter is usually between 1 cm and 10 cm) from the perspective of bamboo diameter, wherein the bamboo used for papermaking is mainly medium-small-diameter bamboo, such as Sagittaria sagittifolia, yellow bamboo and the like, and is mainly used for producing paper pulp by taking raw bamboo slices as raw materials, while the large-diameter bamboo, such as phyllostachys pubescens, dragon bamboo and the like, is mainly used for manufacturing household articles such as artware, plates and the like. In the processing process of the large-diameter bamboo, only about 1/3 of the weight of the bamboo is processed into a finished product, and about two thirds of the bamboo is cut into offcuts, so that the bamboo can only be used as fuel or machine-made carbon raw materials at present and becomes a byproduct with low yield. How to utilize the sliced waste generated in the processing process of the large-diameter bamboo as a high-value raw material is a realistic problem in front of the bamboo processing industry in China. The fiber length of the pulp is an important factor in the selection of raw materials for the paper industry. The research shows that the fiber length has close relation with the tensile strength, tearing strength, folding endurance and bursting strength of paper products, and the tensile strength is improved along with the increase of the fiber length, the dependence of the tearing strength on the fiber length is changed along with the combination condition of the fibers, when the combination degree is lower, the dependence is larger, the bursting strength and folding endurance are improved along with the increase of the fiber length and the paper sheet tightness, and the longer the fiber is, the better the combination is, and the more the combination is increased. Therefore, how to reduce damage to bamboo fibers in the process of processing bamboo into pulp to obtain pulp with longer fiber length is a key factor for improving pulp products and paper products. There is no report on the preparation of pulp with longer fiber length by using the slicing waste generated in the large-diameter bamboo slicing procedure. Disclosure of Invention In view of the above problems in the prior art, an object of the present invention is to provide a method and a production system for processing large-diameter bamboo wood slicing waste into pulp. The invention provides a method for processing large-diameter bamboo wood slicing waste into paper pulp, which takes slicing waste generated during large-diameter bamboo wood slicing as raw material to carry out pulping treatment to obtain paper pulp, wherein the included angle between the plane formed by the relative motion track between a slicing knife edge and the bamboo wood or the cutting plane of a curved surface and internode bamboo fibers is 0-1 degree during slicing. The included angle between the plane formed by the track of the relative motion between the slicing knife edge and the bamboo wood or the cutting plane of the curved surface and the internode bamboo fibers can enable the slicing direction to be parallel or approximately parallel to the direction of the bamboo wood fibers, and the damage of slicing equipment to the bamboo wood fibers can be effectively reduced while the product (bamboo strips or bamboo chips) with required specifications is obtained, so that the fiber length of the prepared paper pulp can be effectively improved when the slicing waste is used as a raw material for pulping. In the invention, the relative motion between the slicing knife edge and the bamboo wood refers to the relative motion between the bamboo wood and the slicing knife at the sl