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Industrialized production method of wheat straw flakeboard

A production method and technology of particle board, applied to flat products, manufacturing tools, wood processing equipment, etc., can solve the problems of ineffective industrial production and increasing demand for wood-based panels, and achieve high yield and uniform glue mixing Effect

Inactive Publication Date: 2005-06-29
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, due to the protection of the environment and forest resources in various countries, the use of wood-based panels is gradually restricted, but the demand for wood-based panels in society is increasing. All countries have increased research on the use of crop straw as raw materials for wood-based panels. However, industrialized production cannot be effectively carried out. Therefore, it is necessary to design a process flow and corresponding industrialized production line for the industrialized mass production of wheat (rice) straw particle boards.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Process steps of selecting wheat straw as raw material to manufacture particle board: (1) Use a grass cutter (model ZCQ3) to cut the wheat straw into 30mm straw units, and then pass through a screening machine (model ZCQ) to screen and remove the debris in the raw material Leaves, mud and sand impurities, after hydrothermal or microwave treatment, are crushed with a pulverizer, and screened again with a screening machine (model BF149C) to remove dust from the crushed materials, and send the coarser crushed materials to re-crushed; Wheat straw scraps are dried with a rotor dryer (model BG2327A) at a drying temperature of 80°C and a moisture content of 8%. The dried raw materials are divided into surface layer fine material and core layer coarse material, and the fine material is sent to the surface layer silo, and the coarse material is Then enter the core layer silo; (2) using isocyanate as the adhesive, the surface layer sizing amount accounts for 4% of the absolute dry...

Embodiment 2

[0015] Process steps of selecting rice straw as raw material to manufacture particle board: (1) Cut wheat straw into 30mm straw units with a grass cutter (model ZCQ3), and then screen and remove the broken pieces in the raw material through a screening machine (model ZCQ) Leaves, mud and sand impurities, after hydrothermal or microwave treatment, are crushed with a pulverizer, and screened again with a screening machine (model BF149C) to remove dust from the crushed materials, and send the coarser crushed materials to re-crushed; Wheat straw scraps are dried by a rotor dryer (model BG2327A) at a drying temperature of 120°C and a moisture content of 12%. The dried raw materials are divided into surface layer fine material and core layer coarse material, and the fine material is sent to the surface silo, and the coarse material is Then enter the core layer silo; (2) using isocyanate as the adhesive, the surface layer sizing amount accounts for 6% of the absolute dry rice straw sc...

Embodiment 3

[0017] The process steps of mixing wheat and rice straw as raw materials to make particle boards (1) Use a grass cutter (model ZCQ3) to cut the wheat straw into 30mm straw units, and then pass through a screening machine (model ZCQ) to screen and remove the raw materials. Broken leaves, mud and sand impurities, after hydrothermal or microwave treatment, crush with a pulverizer, and then use a screening machine (model BF149C) to screen again to remove the dust in the crushed materials, and send the coarser crushed materials to re-crushed ; The wheat straw fragments are dried by a rotor dryer (model BG2327A), with a drying temperature of 100°C and a moisture content of 9%; (2) Using isocyanate as the adhesive, the surface layer sizing amount accounts for 5% of the dry wheat (rice) straw scrap weight, and the core layer sizing amount accounts for 5% of the dry wheat (rice) straw scrap weight. 4% of the weight of (rice) straw scraps, 1.5% waterproofing agent (model NLW-1) should b...

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Abstract

The invention relates to a crushed aggregate of wheat straw industrial producing techniques. Its technique steps is divided into raw material processing, glue mixing and laying, pavementalize and demoulding , heat pressing, late treatment. The advantages of the invention are: the raw material is crushed by special crusher after processed with heat water or micro wave or plasma, to obtain wheat straw crushed aggregates of better obtaining rate and shape. The glue mixing is finished in a rolling cylinder on cycle type combined glue mixer while ensuring the gluing volume is reduced and uniform. The technique is adopted with combined demoulding techs in which the sheet surface is applied with single-time demoulding agent or sand powder; the surface of the upper pressing plate and the lower bedding plate is applied with semipermanent demoulding agent. The tech solves the problem that after pavementalizing the viscosity between the crushed aggregates of wheat straw and is easily cracked while being transferred, by adopting the plain echoing system. The performance of the crushed aggregates sheets meets the standard requirements inside and outside the nation with a dissociating methanal content of nearly zero which is difficult for the existing wooden shaving board and medium intensity fibre board.

Description

technical field [0001] The invention relates to a method for manufacturing a wheat (rice) straw particle board used for industrial production, and belongs to the field of artificial board manufacturing. Background technique [0002] At present, due to the protection of the environment and forest resources in various countries, the use of wood-based panels is gradually restricted, but the demand for wood-based panels in society is increasing. All countries have increased research on the use of crop straw as raw materials for wood-based panels. However, industrial production cannot be effectively carried out. Therefore, it is necessary to design a process flow and a corresponding industrial production line for the industrial mass production of wheat (rice) straw particle boards. Contents of the invention [0003] The purpose of the present invention is to provide a process for manufacturing wheat (rice) straw particle boards with low cost and industrial production. Technica...

Claims

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Application Information

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IPC IPC(8): B27L11/00B27M1/08B27N1/00B27N3/02
Inventor 周定国张洋徐咏兰梅长彤周哓燕徐信武华毓坤吴羽飞
Owner NANJING FORESTRY UNIV
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