Pinch Analysis for Heat Integration of Pulverized Coke Chemical Looping Gasification Coupled with Coke-Oven Gas to Methanol and Ammonia

Yaxian Zhao; Yingjie Zhao; Yi Huang; Jiancheng Wang; Weiren Bao; Liping Chang; Lijuan Shi; Qun Yi

LAPSE

Living Archive for Process Systems Engineering

LAPSE:2023.1891

Published Article

LAPSE:2023.1891

Pinch Analysis for Heat Integration of Pulverized Coke Chemical Looping Gasification Coupled with Coke-Oven Gas to Methanol and Ammonia

Yaxian Zhao, Yingjie Zhao, Yi Huang, Jiancheng Wang, Weiren Bao, Liping Chang, Lijuan Shi, Qun Yi

February 21, 2023

Methanol and ammonia are important chemical materials in the chemical industry. During the production of methanol and ammonia, a large amount of waste heat is released. The waste heat can be used to save energy and reduce CO2 emissions. In this study, pinch analysis is used to design the heat exchanger network (HEN) of pulverized coke (PC) chemical looping gasification coupled with coke-oven gas (COG) to methanol and ammonia (PCCLHG-CGTMA). The heat integration process is accomplished in two ways, as mentioned below. (1) The HENs in each of the three heat exchange units are designed individually; (2) the HENs of the three heat exchange units are treated as a whole and designed simultaneously. Compared to the HEN designed individually, when the HENs are designed as a whole, a total of 112.12 MW of hot and cold utilities are saved. In the HENs designed as a whole, the reduction in operating cost is sufficient to offset the increase in capital cost; the total annual cost (TAC) is reduced by 10.9%. These results reveal that the HENs designed as a whole have more scope for energy saving, which can be a reference for new HEN design and modification to realize more heat recovery and lower investment.

Record ID

LAPSE:2023.1891

Keywords

ammonia, coke-oven gas, Heat Exchanger Network, heat integration, Methanol, pinch analysis

Subject

Energy Systems

Suggested Citation

Zhao Y, Zhao Y, Huang Y, Wang J, Bao W, Chang L, Shi L, Yi Q. Pinch Analysis for Heat Integration of Pulverized Coke Chemical Looping Gasification Coupled with Coke-Oven Gas to Methanol and Ammonia. (2023). LAPSE:2023.1891

Author Affiliations

Zhao Y: State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China; Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China; Departmen
Zhao Y: State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China; Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
Huang Y: School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
Wang J: State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China; Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
Bao W: State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China; Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
Chang L: State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China; Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
Shi L: School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
Yi Q: School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China; Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan 030024, China [ORCID]

Journal Name

Processes

Volume

10

Issue

9

First Page

1879

Year

2022

Publication Date

2022-09-16