Method for making environment-friendly wood material through microwave shaping of straws
A technology of wood materials and straw, which is applied in the field of microwave shaped straw to manufacture environmentally friendly wood materials, can solve the problems of processing technology limitations, difficulty in meeting requirements, low production efficiency, etc., and achieve the effects of avoiding health damage, good sound insulation effect, and cost saving
Inactive Publication Date: 2014-07-30
FUDAN UNIV +1
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Problems solved by technology
At present, the straw briquetting machine is an increasingly mature equipment, but because its temperature is generated by pressurized rotation, it has great restrictions on processing technology. The cross-sectional diameter of the product produced by the straw briquetting machine is 30-100 mm, and the larger the size The lower the production efficiency
Such products are too small in size and can only be used as fuel or feed, which is difficult to meet the requirements of construction, decoration and other materials
Method used
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specific Embodiment
[0035] Specific embodiment: directly harvested wheat straw is mixed with 3% sulfuric acid catalyst, and squeezed into the microwave reaction cavity through a feeder. The reaction chamber is cylindrical and made of stainless steel. Several 1 kW magnetrons are arranged outside the chamber to generate microwaves with a frequency of 2450 MHz. The microwave is transmitted through the waveguide, and enters the reaction chamber from the glass window on the surface of the chamber, and deeply heats the raw material of wheat straw in the chamber, heating to 150 ℃ within 15 minutes, so that the straw dries and produces lignin, increasing the viscosity of the material. The microwave reaction chamber is also used as an extrusion die. Under the condition of continuous feeding from the feeder, the straw is pressed and shaped at 150 ℃ and extruded into a long cylindrical stick material.
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Abstract
The invention belongs to the technical field of environmental protection and comprehensive resource utilization, in particular to a method for making an environment-friendly wood material through the microwave shaping of straws. A microwave deep heating technology is adopted in the invention. A straw raw material is squeezed into a microwave reaction cavity by a feeder after being mixed with a catalyst and heated to 120-260DEG C under microwave action. The fibers of the raw material are dried, the generation of lignins is increased, the material binding property is improved, and meanwhile, after the raw material is shaped under the condition of being pressed, the strip wood material with different cross section shapes, any edge length or a diameter larger than 60mm is extruded. As the hollow and light characteristics of the straws are fully utilized by the material made by the method in the invention, the material has great heat insulating and sound insulating effects, is mould-proof, does not absorb water, is safe and environment-friendly, can replace wood or plastics and has wide application prospects.
Description
technical field [0001] The invention belongs to the technical field of environmental protection and resource comprehensive utilization, and in particular relates to a method for manufacturing environmentally friendly woody materials from microwave-shaped straws. Background technique [0002] Straw is the general term for the stems and leaves (ears) of mature crops, and is the most important by-product of crops in rural areas. It has become the fourth largest energy source in the world today, second only to coal, oil and natural gas. As a large agricultural country, my country has a large output, wide distribution and variety of crop straws. According to survey statistics, in 2010, the amount of straw that can be collected in my country is 700 million tons, which is very rich in resources. For a long time, straw has been an important raw material for farmers' production and life. However, with the continuous development of the rural economy in recent years, coal, electricit...
Claims
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IPC IPC(8): B27N3/12B27N3/18
Inventor 张善端韩秋漪荆忠
Owner FUDAN UNIV
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