制浆麦渣颗粒燃料的成型特点及燃烧特性研究

Study on Molding and Combustion Characteristics of Wheat Pulp Pellet Fuel

关键词:  麦渣  制浆废液  颗粒燃料  成型特点  燃烧特性

Key Words:wheat residue  pulping waste liquid  pellet fuel  formation characteristics  combustion properties

摘要:以制浆造纸企业备料工段的麦草废渣和制浆废液为原料，利用液压成型机制备麦渣颗粒燃料，探究其成型特点和燃烧特性。研究了麦渣粒径和废液添加量对麦渣颗粒燃料成型效果的影响，分析了燃料颗粒灰分、挥发分、固定碳及发热量的变化规律，得出了麦渣颗粒燃料的较优制备条件。结果表明，随着麦渣粒径减小，麦渣颗粒燃料成型密度逐渐增大，当麦渣粒径在0.45~0.90 mm、废液添加量10%时，麦渣颗粒燃料成型效果最好，表面较为光滑，密度为1.26 g/cm³，抗压强度为58.1 MPa，燃烧热值高达14807 J/g。废液添加量高于10%时会导致成型结构不稳定。

Abstract:Using wheat straw waste residue and pulp waste liquid from the material preparation section of pulp and papermaking mill as raw materials， wheat residue based biomass pellet fuel was prepared by hydraulic molding machine， and its forming characteristics and combustion characteristics were investigated. The influence of grain size of wheat residue and the amount of waste liquid on the forming effect of fuel particles was studied， and the change rules of ash， volatilization， fixed carbon and caloric value of fuel particles were analyzed. The optimal preparation conditions of wheat straw waste residue pellet fuel were obtained. The results showed that the molding density gradually increased with the decrease of grain size. The optimal preparation conditions were that the grain size of wheat residue was in the range of 0.45~0.90 mm and the amount of waste liquid was 10%. Under these conditions， the surface of pellet fuel was smooth， the density was 1.26 g/cm³， and the compressive strength was 58.1 MPa. When the calorific value of combustion was up to 14807 J/g and the amount of waste liquid was higher than 10%， the forming structure was unstable.