摘要
为探究印染行业生产过程中挥发性有机物(volatile organic compounds, VOCs)的产生特征及现有控制措施对VOCs的去除效果,选取浙江某典型印染企业作为研究对象,调查了该企业主要VOCs污染源(包括定型机、配料间及污水站)的废气产生特征,测定和评价了各废气处理装置对VOCs的去除效果。结果表明,该企业定型机、配料间及污水站产生的有组织废气总流量分别为8.6×10^5、7.4×10^4、2.8×10^4 m^3·h^-1,产生的VOCs平均浓度分别为14.7、9.0和14.9 mg·m^-3,有组织废气源VOCs的年产生总量约为80 t。定型车间、印染车间和污水站附近无组织VOCs的平均浓度分别约为0.66、0.16和0.59 mg·m^-3。产生的典型VOCs包括苯甲酸苄酯、五氟丙酸三十八烷酯、乙二醇单丁醚、十六烷、异喹啉等。定型机废气采用"冷却+静电"或"喷淋+静电"工艺处理,其对VOCs的去除率仅为2%~6%。配料间和污水站产生废气采用"碱洗+次氯酸钠洗涤"工艺处理,其对VOCs的去除率为8%~58%。研究结果可为印染行业VOCs污染控制提供参考。
This study aimed at revealing the VOCs production characteristics and the removal effect by the existing control measures in the typical printing and dyeing industry. A typical printing and dyeing enterprise which has three plants and a waste water treatment plant(WWTP) in Zhejiang were selected to investigate the exhaust gas production characteristics from VOCs pollution sources(heat-setting machine, dosing room and WWTP), and the VOCs removal effects by exhaust gas treatment devices were tested and evaluated. The results showed that the organized exhaust gas flow from heat-setting machine, dosing room and WWTP were 8.6×105,7.4×104 and 2.8×104 m3·h-1, and the VOCs concentrations were 14.7, 9.0 and 14.9 mg·m-3, respectively. The total VOCs production from organized exhaust gas sources in this enterprise was 80 t per year. The average concentration of unorganized VOCs beside heat-setting machine, dosing room and WWTP were 0.66, 0.16 and 0.59 mg·m-3, respectively. Typical VOCs included octatriacontyl pentafluoropropionate, ethylene glycol monobutyl ether, benzyl benzoate, hexadecane, isoquinoline, etc. The exhaust gas from heat-setting machine was treated by the process of cooling and electrostatic precipitation(ESP) or water spaying and ESP, and their VOCs removal rates were only between 2% and 6%. The exhaust gas from dosing room and WWTP was treated by the process of sodium hypochlorite and alkali spraying, and its VOCs removal rate was between 8% and58%. The research results can provide theoretical support for VOCs pollution control in printing and dyeing industry.
作者
东东
席劲瑛
张荣社
DONG Dong;XI Jinying;ZHANG Rongshe(School of Environment,Tsinghua University,Beijing 100084,China;Association of Science&Technology of Shaoxing,Shaoxing 312000,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2020年第2期432-439,共8页
Chinese Journal of Environmental Engineering
基金
国家重点研发计划(2018YFC1801101)。
关键词
印染行业
废气特征
VOCS
定型机
printing and dyeing industry
exhaust gas characteristics
VOCs
heat-setting machine
