利用旋轉填充床進行強化吸收法處理含三甲胺廢氣

Abstract

近幾年，空氣污染的問題越來越受到重視，其中臭異味的問題更是一般民眾可以感受到的，然而這些臭異味的來源主要為揮發性有機物，因此本研究使用三甲胺做為主要的揮發性有機物，並引入超重力旋轉床，透過它的高質傳效果搭配一些化學藥劑進行化學洗滌。本研究在適當的操作條件下，僅使用超重力旋轉床進行吸收去除，便可達到82.8%以上的去除效率。此外，加入相對於三甲胺兩倍莫耳數的二氧化氯、過氧化氫以及檸檬酸進行化學洗滌，整體的最大去除效率可以分別達到99.4%、95.9%和92.1%。同時本研究也透過發展理論模式來預估質傳係數，並且和實際值進行兩者間的誤差比較。最後，本研究在化工廠中進行實廠實驗，並利用其他種類的揮發性有機物做為標的，如甲醇、丙烯酸甲酯等，進行三階段的可行性評估，結果顯示僅加入二氧化氯，去除效率僅達到69%，且同時會產生二氧化氯氣味；另一方面，僅使用超重力旋轉床進行吸收，可達到91%的去除效率，且對臭味改善效果較好。最後，若是同時加入二氧化氯並使用超重力旋轉床進行吸收，可以達到99.1%的去除效率並有效去除臭異味。

In recent years, the problem of air pollution has received more and more attention, and the problem of odor is even more common to the general public. However, the source of these odors are mainly volatile organic compounds. Therefore, trimethylamine was used as the main volatile organic compounds in this study. In addition, high-gravity rotating packed bed was introduced for chemical oxidation through its high mass transfer effect with some chemical agents. In this study, under proper operating conditions, only a high-gravity rotating bed was used for absorption, a removal efficiency of over 82.8% could be achieved. Moreover, adding chlorine dioxide, hydrogen peroxide, and citric acid twice the moles of trimethylamine for chemical oxidation, the overall maximum removal efficiency can reach 99.4%, 95.9%, and 92.1%, respectively. At the same time, a theoretical model was also developed in this research to estimate the overall mass transfer coefficient, and compare with the actual value. Finally, field experimentation was conducted in a petrochemical plant, and other types of volatile organic compounds were used as targets, such as methanol, methyl acrylate, etc. In the three-stage feasibility evaluation, the results showed that when only adding chlorine dioxide, the removal efficiency was only 69%, and odor of chlorine dioxide was generated; on the other hand, only using the high-gravity rotating packed bed for absorption, it could reach 91% the removal efficiency, and the odor improvement effect was better. Finally, if chlorine dioxide was added and the high-gravity rotating packed bed was used for absorption at the same time, the removal efficiency of 99.1% can be achieved and the odor can be effectively removed.