Energy integration of multi-effect reactive distillation for benzyl chloride production

doi:10.11949/j.issn.0438-1157.20150833

CIESC Journal ›› 2015, Vol. 66 ›› Issue (8): 3161-3168.DOI: 10.11949/j.issn.0438-1157.20150833

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Energy integration of multi-effect reactive distillation for benzyl chloride production

SONG Jianguo¹, HUANG Yuxin¹, SUN Yuyu¹, TANG Jihai¹, CHEN Xian¹, CUI Mifen¹, #br# FEI Zhaoyang², QIAO Xu²

1 Jiangsu Key Laboratory of Industrial Water-conservation & Emission Reduction, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, China;
2 State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, China

Received:2015-06-04 Revised:2015-06-26 Online:2015-08-05 Published:2015-08-05
Supported by:
supported by the National Natural Science Foundation of China (21276126, 61203020), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) and the Jiangsu Graduate Research and Innovation Project(SJZZ_0098).

多效反应精馏过程生产氯化苄的能量集成

宋建国¹, 黄玉鑫¹, 孙玉玉¹, 汤吉海¹, 陈献¹, 崔咪芬¹, 费兆阳², 乔旭²

1 南京工业大学化学化工学院, 江苏省工业节水减排重点实验室, 江苏南京 210009;
2 南京工业大学, 材料化学工程国家重点实验室, 江苏南京 210009

通讯作者: 乔旭,汤吉海
基金资助:
国家自然科学基金项目(21276126,61203020);江苏高校优势学科建设工程资助项目;江苏省普通高校研究生科研创新计划项目(SJZZ_0098)。

Abstract

Abstract:

Based on the energy analysis of distillation column with side reactors (CSR) and refining tower (CSRRT) for benzyl chloride production, a new process with two reactive distillation stages was established. Using the steam latent heat of refining tower to heat the kettle of the first reactive distillation tower, a multi-effect reactive distillation (MERD) was proposed. Furthermore, using the reaction heat to heat the tray of the first reactive distillation tower, a multi-effect diabatic reactive distillation (MEDRD) was also investigated. The energy consumptions of the above three processes were compared under the same production requirement. The results showed that comparing with CSRRT, the energy consumption of MERD and MEDRD declined 16.8% and 33.7%, respectively.

Key words: reactive distillation, integration, phase equilibria, benzyl chloride, energy utilization

摘要：

以甲苯氯化生产氯化苄为研究对象,对带侧反应器的反应精馏与精制塔串联工艺(CSRRT)进行研究及能量分析,建立了分段反应精馏与精制塔串联生产氯化苄的新工艺。利用精制塔塔顶蒸汽潜热加热第一段反应精馏塔的塔釜,建立了多效反应精馏(MERD);进一步利用侧反应器的甲苯氯化反应热加热第一段反应精馏塔的塔板物料,建立了多效透热反应精馏(MEDRD)。在相同生产要求下,对3种工艺的能耗进行比较。结果表明,MERD和MEDRD过程实现了能量的优化利用,与CSRRT过程相比,塔釜总再沸器热负荷分别降低16.8%和33.7%。

关键词: 反应精馏, 集成, 相平衡, 氯化苄, 能量利用

CLC Number:

TQ021.8

SONG Jianguo, HUANG Yuxin, SUN Yuyu, TANG Jihai, CHEN Xian, CUI Mifen,
FEI Zhaoyang, QIAO Xu. Energy integration of multi-effect reactive distillation for benzyl chloride production[J]. CIESC Journal, 2015, 66(8): 3161-3168.

宋建国, 黄玉鑫, 孙玉玉, 汤吉海, 陈献, 崔咪芬, 费兆阳, 乔旭. 多效反应精馏过程生产氯化苄的能量集成[J]. 化工学报, 2015, 66(8): 3161-3168.

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Energy integration of multi-effect reactive distillation for benzyl chloride production

多效反应精馏过程生产氯化苄的能量集成

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