1Optimization of operating parameters for vertical ring mold straw briquetting machine

Abstract: Corn straw was used as raw material based on the low productivity, low quality of briquette and high energy consumption due to the operating parameters in the straw briquette production process,, We identified raw material particle size, moisture content, molding machine clearances between die and rollsas three factors for the corn straw The impacts of each factor were divided into three levels. Different combinations of the three process parameters on the productivity, briquetting fuel molding rate, density, mechanical durability and energy consumption per ton of product were studied in accordance with the biomass solid fuel test method. The test results were analyzed with variance analysis of orthogonal test. To ensure the test results can be used for real world production guidance, the orthogonal test results were verified. The results showed that the optimal combination of process parameters is the raw material particle size of 20-30 mm, the moisture content of 15% and the clearances between die and rolls of 2 mm for the briquette quality. To increase productivity and reduce energy consumption per ton of product, the best combinations of process parameters was the raw material particle size of 20-30 mm, the moisture content of 20% and the clearances between die and rolls of 2 mm. Appropriate combination of process parameters depend on the environment. When forming fuel needs long-range transport, it requires high mechanical durability. The process parameter combinations were achieved as raw material particle size of 10-20mm, moisture content of 15% and clearances between die and rolls of 2 mm. When there are no special requirements, the process parameter combinations were treated with particle size of 10-20mm, moisture content of 20% and clearances between die and rolls of 2 mm. According to quality requirements of briquetting fuel molding rate, density and mechanical durability, the moisture content of 10% to 20% range, an appropriate increase in moisture content, were required to improve productivity and reduce energy consumption per ton of product.