高浓度制药废气处理工程实例

Engineering Example of High Concentration Pharmaceutical Waste Gas Treatment

针对高浓度制药废气成分复杂、流量大且不均匀排放的特征,结合该厂废气的成分、浓度和处理要求等,安装一套“预处理+树脂吸附/脱附”设备,经过专门的收集装置收集汇总后对废气进行治理。首先一级碱吸收工艺段,充分吸收医药废气中盐酸成分,去除率达到99.57%;随后采用二级水吸收工艺段和树脂吸附工艺段去除废气中的水溶性有机物(乙醇、乙腈)和不溶于水的正丁醇和二氯甲烷污染物,去除率分别为99.27%,98.90%,99.37%和98.42%;排气筒出水废气浓度满足《大气污染物综合排放标准》(DB32/4041—2021)中排放质量浓度和非甲烷总烃的浓度要求。同时,为保证本项目装置的自身安全和避免对周边装置的影响,本工程在树脂罐内、蒸汽调节阀、蒸汽加热和冷凝连锁等方面采用了独特的设计方法,保证了设备的安全稳定运行。该工程实例也可为后续各种高浓度医药废气的处理提供了一种思路。

Aiming at the characteristics of complex composition,large flow rate and uneven emission of high-concentration pharmaceutical waste gas,combined with the composition,concentration and treatment requirements of the waste gas of the plant,a set of'pretreatment+resin adsorption/desorption'equipment was installed,and the waste gas was collected and collected by a special collection device.Firstly,the first-stage alkali absorption process section fully absorbs the hydrochloric acid component in the pharmaceutical waste gas,and the removal rate reaches 99.57%.Subsequently,the secondary water absorption process section and the resin adsorption process section were used to remove the water-soluble organic matter(ethanol,acetonitrile)and water-insoluble n-butanol and dichloromethane pollutants in the exhaust gas,and the removal rates were 99.27%,98.90%,99.37%and 98.42%,respectively.The effluent concentration of the exhaust pipe meets the requirements of the emission mass concentration and the concentration of non-methane total hydrocarbons in the"Integrated Emission Standard for Atmospheric Pollutants(DB32/4041-2021).At the same time,in order to ensure the safety of the project device and avoid the impact on the surrounding devices,this project adopts a unique design method in the resin tank,steam regulating valve,steam heating and condensation chain,etc.,to ensure the safe and stable operation of the equipment.The engineering example can also provide an idea for the subsequent treatment of various high-concentration pharmaceutical waste gases.