二次风量对LNJ-36A型气流分级机分级性能的影响

doi:10.16085/j.issn.1000-6613.2015.11.006

化工进展 ›› 2015, Vol. 34 ›› Issue (11): 3859-3863.DOI: 10.16085/j.issn.1000-6613.2015.11.006

二次风量对LNJ-36A型气流分级机分级性能的影响

曾川¹, 刘传慧¹, 陈海焱², 张明星², 付瑜², 王晓天¹

1 西南科技大学制造科学与工程学院, 四川绵阳 621010;
2 西南科技大学环境与资源学院, 四川绵阳 621010

收稿日期:2015-05-08 修回日期:2015-05-25 出版日期:2015-11-05 发布日期:2015-11-05
通讯作者: 陈海焱,博士,教授,从事超细粉碎、气流分级技术、通风除尘的研究与设备开发。E-mailchenhaiyan@swust.edu.cn。
作者简介:曾川(1992—),男,硕士研究生,研究方向为超细分级设备。E-mail1421957597@qq.com。
基金资助:
西南科技大学研究生创新基金(15ycx130)、四川省教育厅重点项目(13zd1111)及国家自然科学基金项目(11402218)。

Effects of secondary air on the classification performances of LNJ-36A air classifier

ZENG Chuan¹, LIU Chuanhui¹, CHEN Haiyan², ZHANG Mingxing², FU Yu², WANG Xiaotian¹

1 School of Manufacturing Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China;
2 School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China

Received:2015-05-08 Revised:2015-05-25 Online:2015-11-05 Published:2015-11-05

摘要/Abstract

摘要： 气流分级机二次风量是影响分级机性能的重要因素。通过实验探究二次风量变化对同种物料、不同粒度段及同种粒度段、不同物料分级效果的影响,并提出一种可以直接从粗、细粉粒度分布中得到的分级评价指标——相对分级精度δ,以此来评价分级效果好坏。实验结果表明,不同粒度段的粉煤灰和水泥熟料在相同二次风量的情况下,粒径较小的粉煤灰,其相对分级精度大于粒径较大的粉煤灰;粒径较小的水泥熟料,其相对分级精度大于粒径较大的水泥熟料;同种粒度段的粉煤灰和水泥熟料,在相同二次风量的情况下,相对密度较小的粉煤灰,其相对分级精度大于密度较大的水泥熟料;利用LNJ-36A气流分级机分级粉煤灰和水泥熟料,二次风流量保持在150m³/h、与主气流流量比例保持在0.168时,分级效果最好。

关键词: 气流分级机, 二次风量, 相对分级精度, 分级性能

Abstract: Secondary air of air classifier has important effects on the classification performances of air classifier. This paper investigated the impacts of secondary air flow change to same material, particles of different sizes and particles of same size, different material classification effect, and proposed a classifying evaluating index—the relative classification precision δ, which could be obtained directly from coarse and fine streams size distribution, to evaluate the quality of classifying effects. The experimental results showed that relative classification precision for particles in fly ash and cement clinker. For the same sized particles, in the case of the same secondary air, the relative classification precision of fly ash with smaller particle diameter was greater than that with larger particle diameter, and the relative classification precision of cement clinker with smaller particle diameter was greater than that with larger particle diameter. For the same sized particles, under the condition of the same secondary air, the relative classification precision of fly ash with smaller proportion was larger than that with larger proportion. Optimum classification performance was obtained under the condition of 150m³/h of secondary air flow and the ratio of 0.168 to main flow air rate, using LNJ-36A air classifier to classify fly ash and cement clinker.

Key words: air classifier, secondary air, relative classification precision, classification performance

中图分类号:

TQ051.8

曾川, 刘传慧, 陈海焱, 张明星, 付瑜, 王晓天. 二次风量对LNJ-36A型气流分级机分级性能的影响[J]. 化工进展, 2015, 34(11): 3859-3863.

ZENG Chuan, LIU Chuanhui, CHEN Haiyan, ZHANG Mingxing, FU Yu, WANG Xiaotian. Effects of secondary air on the classification performances of LNJ-36A air classifier[J]. Chemical Industry and Engineering Progree, 2015, 34(11): 3859-3863.

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二次风量对LNJ-36A型气流分级机分级性能的影响

Effects of secondary air on the classification performances of LNJ-36A air classifier

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