Study on the explosion characteristics of alcohol vapor cloud-feed powder dust cloud mixture during the deep processing of waste mash

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2025-06-20 DOI:10.1016/j.csite.2025.106538

Huiqiang Ma , Yihan Zhang , Yuyuan Zhang , Bo Liu , Daoyong Zhu , Kaili Xu , Yantao Yao , Junpeng Wang , Tengteng Hao , Jishuo Li , Haihan Zhang , Zongjun Cheng

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Abstract

The explosion limits (LEL&UEL), maximum explosion pressure (P_max), and minimum ignition energy (MIE) of mixtures composed of four combustible feed dusts and inflammable alcohol vapor are investigated in a modified 20-L spherical explosion system and a modified MIE test system. The explosivity of vapor-dust mixtures is tested according to national standards GB/T16425, GB/T16426 and GB/T16428, using four combustible feed dusts mixed with inflammable alcohol vapor. The results show that adding low concentration alcohol vapor can broaden the range of explosion limits for feed dusts. Alcohol vapor affects both the P_max and MIE of feed dust in a unimodal pattern. There is a critical value for the increase of feed dust explosion parameters by alcohol vapor: 10 vol% alcohol vapor. Below this value, alcohol vapor increases the explosivity of feed dusts remarkably. Above this value, it reduces their explosivity. Finally, the influence of low concentration and high concentration alcohol vapor on feed dusts is examined from the ignition process of alcohol vapor-feed dust mixture. According to the experimental data, we also optimized the explosion discharge area of the auxiliary dust collector of the waste mash drying system. The research conclusion provides a technical means for the safety issues of gas-solid mixed dust removal systems.

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废醪深加工中酒精蒸气云-进料粉尘云混合物爆炸特性的研究

在改进的20 l球形爆炸系统和改进的MIE试验系统中，研究了四种可燃性饲料粉尘与可燃性酒精蒸气混合的爆炸极限（lel&uel）、最大爆炸压力（Pmax）和最小点火能（MIE）。采用四种可燃饲料粉尘与可燃酒精蒸气混合，按照GB/T16425、GB/T16426、GB/T16428国家标准进行气尘混合物的爆炸性试验。结果表明，添加低浓度酒精蒸气可以扩大饲料粉尘的爆炸极限范围。酒精蒸气对进料粉尘的Pmax和MIE均有单峰影响。酒精蒸气对进料粉尘爆炸参数的增加有一个临界值：10vol%的酒精蒸气。在此值以下，酒精蒸气显著增加饲料粉尘的爆炸性。超过这个值，它降低了它们的爆炸性。最后，从酒精蒸汽-饲料粉尘混合物的点火过程出发，考察了低浓度和高浓度酒精蒸汽对饲料粉尘的影响。根据实验数据，对废醪干燥系统辅助集尘器的爆炸出尘面积进行了优化。研究结论为解决气固混合除尘系统的安全问题提供了技术手段。

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.