基于甲醇合成与燃气轮机联合循环的联产系统优化分析

doi:10.3969/j.issn.2097-0706.2025.10.007

综合智慧能源 ›› 2025, Vol. 47 ›› Issue (10): 60-68.doi: 10.3969/j.issn.2097-0706.2025.10.007

• 新能源与储能系统优化 • 上一篇下一篇

基于甲醇合成与燃气轮机联合循环的联产系统优化分析

黄梓琪(), 吴志聪(), 徐钢^*(), 葛士宇(), 陈衡()

华北电力大学热电生产过程污染物监测与控制北京市重点实验室，北京 102206

收稿日期:2024-10-23 修回日期:2024-12-16 出版日期:2025-05-28
通讯作者: *徐钢（1978），男，教授，博士，从事热力学、火力发电节能理论与技术、多能互补系统集成等方面的研究，xgncepu@163.com。
作者简介:黄梓琪（2000），女，硕士生，从事氢醇高效转化及化工动力集成方面的研究，19030821131@163.com；
吴志聪（1997），男，博士生，从事氢醇高效转化及化工动力集成、复杂能源系统集成、发电节能理论与技术等方面的研究，wuzc_ncepu@163.com；
葛士宇（2001），男，硕士生，从事光热电站、氢醇转化、压缩空气储能、卡诺电池、热力系统集成等方面的研究，GSY_Ncepu@163.com；
陈衡（1989），男，教授，博士，从事电力系统集成、优化及评价、“双碳”技术路线、多类型源储协同、电网提质增效等方面的研究，heng@ncepu.edu.cn。
基金资助:
国家自然科学基金项目(51821004)

Optimization analysis of a cogeneration system based on methanol synthesis and gas turbine combined cycle

HUANG Ziqi(), WU Zhicong(), XU Gang^*(), GE Shiyu(), CHEN Heng()

Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation， North China Electric Power University， Beijing 102206， China

Received:2024-10-23 Revised:2024-12-16 Published:2025-05-28
Supported by:
National Natural Scientific Foundation of China(51821004)

摘要/Abstract

摘要：

提出一种新型系统，对甲醇合成系统进行全流程优化。该系统将甲醇合成系统的驰放气用作燃气轮机联合循环（GTCC）的原料气体，且GTCC能够有效利用甲醇合成塔所产生的热量，从而提升整个系统能量的利用效率及发电能力。采用Aspen Plus软件构建新系统模型，与甲醇合成系统进行对比，并对两个系统进行热力学及敏感性分析。热力学分析表明：甲醇合成集成GTCC优化系统与传统系统相比能效提升3.53%，㶲效率提升3.66%。敏感性分析结果显示：操作条件设定压力为3~8 MPa、合成温度为200~300 ℃、分流比为0.95~ 0.99，H₂/CO₂摩尔比为2.5~3.5时，将合成温度设定为250 ℃，H₂/CO₂摩尔比设定为3，提高压力、增大分流比均对甲醇产量的提升有积极作用。

关键词: 绿氢制甲醇, 驰放气优化, 能量分析, 㶲分析, 敏感性分析

Abstract:

A new system was proposed to achieve comprehensive optimization of the traditional methanol synthesis system. In this system， the purge gas from methanol synthesis system served as the feed gas for the Gas Turbine Combined Cycle （GTCC）. Additionally， GTCC effectively recovered the heat generated by the methanol synthesis tower， improving overall energy efficiency and power generation capacity. A model of the new system was developed using Aspen Plus software， and its performance was compared with that of the traditional synthesis system. Thermodynamic and sensitivity analyses were conducted for both systems. Thermodynamic analysis results revealed that， compared to the conventional system， the GTCC-integrated methanol synthesis system achieved a 3.53% enhancement in energy efficiency and a 3.66% improvement in exergy efficiency. Sensitivity analysis indicated that under operating conditions with pressures ranging from 3 to 8 MPa， synthesis temperatures between 200 and 300 ℃， split ratio from 0.95 to 0.99， and an H₂/CO₂ molar ratio between 2.5 to 3.5， increasing pressure， adopting a higher split ratio， setting the synthesis temperature at 250 ℃， and maintaining an H₂/CO₂ molar ratio of 3 contributed positively to methanol production.

Key words: green hydrogen-based methanol production, purge gas optimization, energy analysis, exergy analysis, sensitivity analysis

中图分类号:

TK01：TM471

黄梓琪, 吴志聪, 徐钢, 葛士宇, 陈衡. 基于甲醇合成与燃气轮机联合循环的联产系统优化分析[J]. 综合智慧能源, 2025, 47(10): 60-68.

HUANG Ziqi, WU Zhicong, XU Gang, GE Shiyu, CHEN Heng. Optimization analysis of a cogeneration system based on methanol synthesis and gas turbine combined cycle[J]. Integrated Intelligent Energy, 2025, 47(10): 60-68.

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项目	摩尔分数/%	能量占比^①/%
H₂	32.91	1.16
CO	1.21	0.05
CO₂	30.56
CH₃OH	34.10	3.16
H₂O	1.22

项目	原料气		循环气
项目	H₂	CO₂	循环气
H₂摩尔分数	1.000	0	0.757
CO₂摩尔分数	0	1.000	0.208
CO摩尔分数	0	0	0.027
H₂O摩尔分数	0	0	0.001
CH₃OH摩尔分数	0	0	0.006
温度/℃	50.000	14.000	44.455
压力/MPa	3.0	5.0	4.5
摩尔流量/(kmol·h^-1)	10 380.00	3 460.00	51 718.78

项目	数值
温度/℃	49.46
压力/MPa	0.1
CH₂OH摩尔流量/(kmol·h^-1)	124.31
H₂摩尔流量/(kmol·h^-1)	119.97
CO摩尔流量/(kmol·h^-1)	111.39
CO₂摩尔流量/(kmol·h^-1)	4.40
H₂O摩尔流量/(kmol·h^-1)	4.46
低热值/(MJ·kg^-1)	19.95

项目	数值
环境温度/℃	25
压力/MPa	0.1
空气压缩机压比	25.8
压气机多变效率/%	88
燃烧室燃气出口温度/℃	1 515
燃气轮机排气温度/℃	654
燃气轮机等熵效率/%	92
汽轮机高压缸等熵效率/%	85
汽轮机中压缸等熵效率/%	85
汽轮机低压缸等熵效率/%	85
汽轮机高压缸进汽温度/℃	615
再热温度/℃	92.2
发电效率/%	57.28

项目	文献数据^[17,26]	本文数据	相对误差/%
甲醇产量/(t·h^-1)	104.38	104.44	0.06
甲醇纯度/%	99.92	99.94	0.02
GTCC系统发电净输出功率/MW	526.14	525.07	0.20
GTCC系统发电效率/%	57.62	57.28	0.59

基于甲醇合成与燃气轮机联合循环的联产系统优化分析

Optimization analysis of a cogeneration system based on methanol synthesis and gas turbine combined cycle

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参考文献 32

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Metrics

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参数	甲醇合成系统	甲醇合成集成GTCC优化系统	性能提升情况
入口氢气质量流量/(t·h^-1)	20.92	20.92	0
入口氢气总能量/MW	697.49	697.49	0
压缩机功耗/MW	11.33	12.84	1.51
甲醇产量/(t·h^-1)	104.38	104.38	0
出口甲醇总能量/MW	577.01	577.01	0
GTCC发电功率增量/MW	0	26.30	26.30
甲醇合成能效/%	81.40	84.93	3.53

项目	甲醇合成系统	甲醇合成集成GTCC优化系统	变化量
氢气输入㶲/MW	669.59	669.59	0
电能输入㶲/MW	11.33	12.84	1.51
小计/MW	680.92	682.43	1.51
甲醇输出㶲/MW	594.32	594.32	0
GTCC发电功率增量/MW	0	26.30	26.30
小计/MW	594.32	620.61	26.30
驰放气㶲损/MW	29.82	0	-29.82
甲醇合成器㶲损/MW	39.72	39.72	0
压缩机㶲损/MW	2.38	2.47	0.09
精馏塔㶲损/MW	9.37	9.37	0
换热器㶲损/MW	15.28	6.45	-8.83
GTCC㶲损/MW	0	40.95	40.95
废热㶲损/MW	22.17	14.03	-8.14
小计/MW	161.81	158.72	-6.87
㶲效率/%	87.28	90.94	3.66

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