Method and device for simulating straw compression molding

Abstract

The invention relates to a method and a device for simulating straw compression molding. The method comprises the following steps of: 1) performing defoliation and hair root removal treatment on selected straw; and taking a small amount of straw as a sample after cutting short and drying; 2) measuring and analyzing hemicellulose, cellulose, acid washing lignin, coarse ash and water content of the sample in the step 1); 3) air-drying remaining straw in the step 1); 4) cutting the straw in the step 3) short according to the diameter of a compression tube; 5) performing rehydration treatment on the straw in the step 4); 6) editing an 'open' compression method and a 'closed' compression method according to the varietal characteristics, measured in the step 1), of the straw to be compressed by BlueHill2 software; 7) performing an 'open' compression test and a 'closed' compression test; and 8) when the compression processes are finished completely, respectively recording and storing the displacement and the load in the processes of the 'open' compression test and the 'closed' compression test accruing to a sampling frequency set in the step 6); and calculating stress, strain, straw density and compression ratio energy consumption. The method and the device can be used in a simulation research of a straw compression molding process.

Description

technical field [0001] The invention relates to a method and device for simulating compression molding of crops, in particular to a method and device for simulating compression molding of straw. Background technique [0002] my country is rich in crop straw resources. According to statistics, the annual output is about 700 million tons, accounting for about 30% of the world's total straw output, equivalent to about 300 million tons of standard coal. The crop straw resources have huge utilization potential. There are many ways to process and utilize straw, such as fuel, material, feed, fertilizer and base material. Among the many utilization technologies of crop straws, the pretreatment link is the key to the effective utilization of biomass energy, and straw compression molding is an important one of its pretreatment technologies. my country has a vast territory, and straw has the characteristics of scattered distribution and loose structure. In the process of collection, s...

AI Technical Summary

Problems solved by technology

[0003] Straw compression is mainly divided into "open" and "closed" compression forms. If the process optimization and molding law research are carried out by continuously adjusting various straw compression parameters directly in the actual production compression equipment, it is difficult to realize the "open type" on the one hand. " and "closed" rapid conversion, on the other hand, the actual production equipment is huge, the cost is high, multiple compression tests are easy to cause damage, and the actual production equipment needs to use a lot of raw materials and energy consumption during the compression test, which can easily cause huge damage. Waste of resources, and a long cycle

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