間接熱脫附過(guò)程質(zhì)量平衡研究

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摘要：回轉(zhuǎn)式間接熱脫附是一種高效、快速的污染土壤熱修復(fù)技術(shù)。研究表明，加熱溫度為650 ℃，停留時(shí)間為40 min時(shí)，污染土壤修復(fù)可以達(dá)標(biāo)。熱脫附期間，苯并[a]芘和石油烴在處置前后介質(zhì)中的質(zhì)量不平衡。經(jīng)分析，原因可能是苯并[a]芘和石油烴在處置過(guò)程中由于高溫發(fā)生裂解轉(zhuǎn)化。

關(guān)鍵詞：間接熱脫附；污染土壤；修復(fù)；質(zhì)量不平衡；裂解轉(zhuǎn)化

中圖分類(lèi)號(hào)：X53 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1008-9500（2023）08-00-03

DOI：10.3969/j.issn.1008-9500.2023.08.016

Study on Mass Balance of indirect Thermal Desorption Process

ZHANG Jicheng

（Zhongrun Wanlong （Chongqing） Environmental Protection Technology Co.， Ltd.， Chongqing 401121， China）

Abstract： Rotary indirect thermal desorption is an efficient and fast thermal remediation technology for contaminated

soil. Research has shown that when the heating temperature is 650 ℃ and the residence time is 40 min， the remediation of contaminated soil can meet the standards. During thermal desorption， there is an imbalance in the mass of benzo [a] pyrene and petroleum hydrocarbons in the medium before and after disposal. After analysis， the reason may be that benzo [a] pyrene and petroleum hydrocarbons undergo pyrolysis and transformation due to high temperature during the disposal process.

Keywords： indirect thermal desorption; contaminated soil; remediation; mass imbalance; pyrolysis and transformation

熱脫附技術(shù)是通過(guò)直接或間接加熱，將污染土壤加熱至目標(biāo)污染物的沸點(diǎn)以上，通過(guò)控制系統(tǒng)溫度和物料停留時(shí)間有選擇地促使污染物氣化揮發(fā)，達(dá)到目標(biāo)污染物與土壤顆粒分離、去除的目的[1]。（剩余2237字）