酒精糟液烘干废气治理工艺实践  

Practice of Treatment Technology of Waste Gas from Distiller s Grains Drying

作　　者：刘永家 LIU Yong-jia(Heilongjiang Hongzhan Biotechnology Co,Ltd,Heilongjiang Qiqihar 161300,China)

机构地区：[1]黑龙江鸿展生物科技股份有限公司,黑龙江齐齐哈尔161300

出　　处：《广州化工》2024年第12期143-144,共2页GuangZhou Chemical Industry

摘　　要：以玉米为原料生产酒精,副产品酒糟一般作为饲料原料加以利用,酒糟在烘干过程产生的二次废气是企业恶臭污染物的主要来源。主要恶臭特征是酸臭味,它是酒精发酵过程中在少量产酸杂菌的作用下,产生的低碳链有机酸和水解氨基酸所致,本工艺利用酸碱中和的原理,通过对原生产线改进,采取两级洗涤、碱液中和、负压蒸发降温、捕集除雾等方法,可有效降低废气恶臭污染物排放浓度,实现了废气的达标排放,同时洗涤水经负压蒸发系统释放热量,实现余热的二次利用。Corn is used as raw material to produce alcohol,and the by-productdistiller s grains are generally used as feed materials.The secondary waste gas produced by distiller s grains in the drying process is the main source of odor pollutants in enterprises.The main odor characteristic is sour odor,which is produced by low carbon chain organic acids and hydrolyzed amino acids under the action of a small amount of acid-producing bacteria in the process of alcohol fermentation.In this work,the emission concentration of odor pollutants from waste gas was effectively reduced by improving the original production line.The methods of two-stage washing,alkali neutralization,negative pressure evaporation and cooling,trapping and defogging were adopted.The emission standard of waste gas was achieved.At the same time,the washing water released heat through the negative pressure evaporation system to realize the reuse of waste heat.

关 键 词：酒糟 烘干 废气 废气治理 

分 类 号：TS239[轻工技术与工程—粮食、油脂及植物蛋白工程]