涂装车间废气的治理

采用环保型涂料,提高涂料的利用率,减少涂料的使用量以达到涂装车间减少废气排放的要求.涂装车间目前治理废气常用的方法有:直接燃烧法,液体吸收法,活性炭吸附法.因为对资源的重新回收利用的要求,活性炭吸附法和液体吸收法得到更多的研究和发展.液体吸收法根据涂料是水性或溶剂型分别采用水或矿物油(如硅油)作吸收剂,提高吸收效率.活性炭吸附法最有前景的是采用活性炭纤维布(ACFC)作为吸附介质,通电加热脱附回收有机溶剂.

有机废气活性炭吸附法工程应用及其前景探讨

大风量,低浓度的挥发性有机废气是常见工业废气,其处理方法有很多种,文章介绍了目前应用较广的活性炭吸附法,提出活性炭在处理大风量,低浓度的有机废气中存在的脱附问题,对活性炭吸附法的应用前景进行分析建议.

浙江省工业涂装VOCs治理现状

In this paper, 1 433 industrial coating enterprises in Zhejiang Province surveyed in 2015 were chosen as the study targets. The status of VOCs emission and control of the industrial coating sector in Zhejiang Province was summarized, and the VOCs control effect and problems were analyzed accordingly. The results showed that the coverage rate of waste gas treatment facilities of industrial coating reached to 52.8%, with one-time activated carbon adsorption and water/alkali adsorption as the main treatment technologies. The sampling survey indicated that the enterprises which treated the exhaust gases from the painting and drying solidification process simultaneously only accounted for 29% of the total samples. By collection of over 300 manual monitoring data of non - methane hydrocarbon (NMHC) from more than 40 industrial coating enterprises among the survey targets, it was found that the NMHC concentrations of the imported painting waste gas treatment facilities were in the range of 10~80 mg/m3, and those of the imported curving and drying waste gas treatment facilities were in the range of 300~2 000 mg/m3. After the treatment, most of the waste gas could basically meet the emission standards, but the efficiency of treatment facilities was rather low. Meanwhile, there were many existing problems including low collection efficiency of waste gas, low coverage rate of treatment facilities, incomplete waste gas treatment and poor facility management, indicating that VOCs treatment of the industrial coating process in Zhejiang Province was still at the beginning stage.%以浙江省2015年调查的1433家工业涂装企业作为研究对象,总结了浙江省工业涂装行业挥发性有机物(VOCs)排放和治理情况,分析了 VOCs治理成效与存在的问题.结果表明:浙江省工业涂装废气治理措施覆盖率达52.8%,以一次性活性炭吸附和水/碱吸收技术为主;抽样调查发现,涂漆工序和干燥固化工序废气同时治理的企业仅占抽样调查数的29%;通过其中40余家工业涂装企业的300余个非甲烷总烃(NMHC)指标手工监测数据汇总发现,涂漆废气治理设施进口 NMHC 浓度普遍在10 ~80 mg/m3范围内,固化烘干废气治理设施进口 NMHC 浓度普遍在300 ~2000 mg/m3范围内,大部分废气经处理后基本都能够达标排放,但治理设施处理效率较低;同时存在废气收集效率低,治理措施覆盖率低,废气治理不全,设施疏于管理等问题,表明浙江省工业涂装VOCs治理尚处于起步阶段.