Crop straw manmade board and production method thereof

Abstract

The invention discloses a crop straw manmade board and a production method thereof. The production method comprises the steps of (1) cutting straws of which the moisture content is 20%-30% into straw sections of which the length is 10-100 mm; (2) uniformly drying the straw sections by adopting drying equipment, and enabling the moisture content of the straw sections to be reduced to 3%-20%; then removing sundries in the straw sections; (3) pulverizing the straw sections by adopting a pulverizer; (4) screening pulverized fiber into coarse materials and fine materials by adopting screening equipment; (5) taking the coarse materials as raw materials of a core layer and the fine materials as the raw materials of a surface layer, sequentially carrying out sizing, mat formation, pre-pressing, hot pressing and post-processing, and obtaining the crop straw manmade board. According to the crop straw manmade board and the production method, disclosed by the invention, the straws are cut into the straw sections, and feeding, drying and pulverizing are easy; the energy consumption of the pulverizer can be reduced due to dry and clean straw sections, and the production efficiency is substantially increased; meanwhile, the fault rate of the pulverizer is greatly reduced, and continuous and stable production is ensured; the straw yield is increased, the shapes of wood shavings are uniform, and the apparent mass and the physical and chemical performance of a straw board are ensured.

Description

Technical field [0001] The invention relates to the field of man-made board manufacturing, in particular to a crop straw man-made board and a production method thereof. Background technique [0002] Crop straw is a valuable renewable resource. The annual output of crop straw in my country is about 700 million tons. However, due to the influence of consumption concepts and lifestyles for a long time, my country’s rural straw resources are completely in a state of high consumption, high pollution, and low output. A considerable part of the crop straw has been discarded or burned, and has not been reasonably developed and utilized. Making full use of straw, a renewable resource, is undoubtedly one of the effective ways to solve the shortage of resources. The use of crop stalks to manufacture wood-based panels is one of the projects that is indeed feasible and industrialized, but the quality of crop straws cannot be guaranteed. This is a bottleneck that severely restricts the compreh...

AI Technical Summary

Problems solved by technology

Therefore, straw-based panels are still unable to be widely promoted, largely because the quality of straw cannot be effectively guaranteed, which brings great difficulties to the fiber preparation section of straw-based panel production.

For example: 1. When the moisture content of straw is high, it is very difficult to crush, the production efficiency plummets, and the energy consumption is high. At the same time, frequent start and stop also affect the work efficiency, and the equipment failure rate also rises sharply (such as the damage of the grinder shaft. ); 2. The moisture content of the straw is not uniform, resulting in a large difference in the shape of the straw shavings, which cannot guarantee a uniform shape, affecting the apparent quality and physical and chemical properties of the wood-based panel. Industrialized production brings huge problems; 3. Foreign matter in the purchase of straw, such as sand, stone, iron, and mud, will have a destructive impact on each section of the straw board production line (for example, hard impurities will cause safety hazards during the crushing process. Hidden dangers, it will also break the screen, damage the equipment, etc.)

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