Straw pelleting process

Abstract

The invention belongs to the field of processing and application of straw and particularly relates to a straw pelleting process. The process mainly comprises the steps of 1), performing coarse grinding and feeding the ground straw into an ensiling pool to perform ensiling fermentation treatment; 2), drying to obtain ground straw with the water content of 9-15%; 3), performing fine grinding to obtain straw fiber with the particle size of 40-50 meshes per square inch and placing the straw fiber into a storage bin for storage through an air-assisted dust removal system; 4), pelleting, conveying the straw fiber to a ring die pelleting machine and performing compression molding by using a ring die and a compression roller to obtain rodlike straw particles with the density of 1-1.2g / cm3; and 5), performing cooling molding, placing the compressed straw particles into a cooler and cooling the straw particles to the room temperature through air cooling to obtain formed particles with smooth surfaces. According to the process, the straw is used fully, the pelleting effect is good, and the formed straw particles are smooth in surface and free from obvious cracks, are clean energy, can be used as base materials for culture of fungi or supplementary feed of livestocks and are convenient to popularize and apply in a large scale.

Description

technical field [0001] The invention relates to a straw granulation process, which belongs to the field of straw processing and application. Background technique [0002] As waste corn stalks in rural areas are usually crushed and returned to the field or harvested and stacked, they occupy a large area and are difficult to store. When the weather is dry, it is easy to bring safety hazards; The sowing of wheat, so some places usually use incineration for disposal, but incineration will cause a huge air pollution, which is now banned. In order to reuse these straws, some places use a granulator to granulate the straws. However, since the main components of straw are cellulose, hemicellulose and lignin, lignin is a structural monomer with aromatic characteristics and an amorphous substance that exists in the lignified tissue of plants. At the same time, the lignin in the straw is not tightly combined with the cellulose, so the granulation effect is not good, and it is easy to...

AI Technical Summary

Problems solved by technology

[0003] According to the deficiencies in the prior art above, the technical problem to be solved by the present invention is: to provide a straw granulation process that can recycle straw, has high granulation density and good effect, and effectively solves the problem of difficult storage of straw , which meets the requirements of mechanization, mass production and continuous production, and at the same time reduces the impact of straw on the environment