共查询到20条相似文献,搜索用时 93 毫秒
1.
2.
3.
4.
5.
6.
给出了“IGCC”能量平衡的工程分析方法,以实例计算了“IGCC”循环热效率,利用此方法可以:(1)计算“IGCC”的循环热效率;(2)计算Q化与Q显在各系统被利用及排出的份额;(3)计算提高“IGCC”各分系统效率对整体“IGCC”系统热效率的影响程序。 相似文献
7.
《节能》2016,(3)
为了实现对IGCC系统整体的热力特性分析,从而明确系统各部分能量损失,以便于针对系统各个子环节提出相应的节能措施。基于Aspen plus过程模拟软件,首先完成了对整体煤气化联合循环(IGCC)的整体模拟,然后采用火用分析法对系统各主要部分进行了热力特性分析。采用德士古气化炉对原煤浆进行气化,常温湿法脱硫以及三压再热锅炉回收燃气轮机乏汽,系统循环热效率达到42.8%,排烟温度仅为89℃,满足了电厂对热效率和排烟标准的要求。结果进一步表明,热量损失最大部分发生在粗煤气净化处(火用损率分别为11.2%、22.8%),其次是余热锅炉和气化炉,加快高温干法脱硫技术或炉内脱硫的研究,是进一步提升系统热效率的有效方向。 相似文献
8.
IGCC中蒸汽系统集成技术与设计原则 总被引:2,自引:2,他引:0
文章概述本研究集体相关的研究成果,包括ICGG蒸汽系统的集成技术与热力特性,提高IGCC中蒸汽系统性能的途径以及IGCC蒸汽系统设计的一般性原则与实例分析,这些工作将有助于更全面,准确地理解IGCC中蒸汽系统,并为其理论建模,定量分析及设计优化提供支持。 相似文献
9.
围绕洁净煤发电技术趋势及热点,针对典型配置及流程的E级IGCC热力系统,以GTPRO商用计算软件为计算平台建立模型并计算,得出典型IGCC系统方案的热力性能指标,通过空分系数及氮气回注系数对系统性能影响的分析计算,揭示了IGCC系统的性能变化规律;通过对系统气化炉显热回收方案进行分析,提出了改进系统热力性能的优化方向。计算表明,在燃气轮机稳定运行范围内,独立空分、氮气回注的系统热力性能最佳;在保证气化炉抗渣除渣能力的基础上增加高温段换热器可有效回收显热,提高系统总体性能。 相似文献
10.
11.
《Energy Conversion and Management》2002,43(9-12):1339-1348
In order to increase the overall efficiency of IGCC, integration of the steam-side subsystem in IGCC is attracting more and more attention with the development of technology and experience achievement. The existing design methods are generally the simulation and analysis of their performance under the conditions of the given steam subsystem configuration. This usually results in only partial optimization. In this paper, a new idea is presented and a new method––simultaneous optimization of configuration and parameters––is investigated and used for IGCC steam subsystem. These are expected to overcome the shortcomings of the previous ones, adapt to various IGCC technological demand for steam subsystem and realize better cascade utilization of exhaust heat from gas turbine. The optimization model for steam subsystem is established, based on modular modeling idea of general system integration. Case study shows that the synthesis optimization method and model presented in this paper are valuable for steam subsystem performance analysis and optimization design of IGCC. 相似文献
12.
13.
14.
简述了整体煤气化联合循环(IGCC)目前的进展情况。介绍了过去和当前世界各国主要的IGCC项目。展示了第二代IGCC装置的性能指标。IGCC为代表的燃蒸联合循环将是21世纪能源建设的重要方向。 相似文献
15.
通过对两种IGCC系统的变工况分析,比较了蒸汽侧滑压运行与定压运行时的性能,指出以选用滑压运行为佳,这时不仅IGCC的效率高些,且汽轮机的排汽干度较高,有利于汽轮机的安全运行。 相似文献
16.
17.
S. AghahosseiniI. Dincer G.F. Naterer 《International Journal of Hydrogen Energy》2011,36(4):2845-2854
This paper develops and analyzes an integrated process model of an Integrated Gasification Combined Cycle (IGCC) and a thermochemical copper-chlorine (Cu-Cl) cycle for trigeneration of hydrogen, steam and electricity. The process model is developed with Aspen HYSYS software. By using oxygen instead of air for the gasification process, where oxygen is provided by the integrated Cu-Cl cycle, it is found that the hydrogen content of produced syngas increases by about 20%, due to improvement of the gasification combustion efficiency and reduction of syngas NOx emissions. Moreover, about 60% of external heat required for the integrated Cu-Cl cycle can be provided by the IGCC plant, with minor modifications of the steam cycle, and a slight decrease of IGCC overall efficiency. Integration of gasification and thermochemical hydrogen production can provide significant improvements in the overall hydrogen, steam and electricity output, when compared against the processes each operating separately and independently of each other. 相似文献
18.
Two process designs of a cryogenic ASU (air separation unit) have been evaluated using exergy analysis. The ASU is part of an IGCC (integrated gasification combined cycle); it is supplying oxygen and nitrogen to the gasifier and nitrogen to the gas turbine. The two process designs separate the same feed into products with the same specifications. They differ in the number of distillation columns that are used; either two or three. Addition of the third column reduced the exergy destruction in the distillation section with 31%. Overall, the three-column design destroyed 12% less exergy than the two-column design. The rational exergy efficiency is defined as the desired exergy change divided by the total exergy change; it is 38% for the three-column design and 35% for the two-column design. Almost half of the exergy destruction is located in compressor after-coolers. Using this heat of compression elsewhere in the IGCC can be an important way to increase the IGCC efficiency. It is proposed to use it for the pre-heating of ASU products or for the production of steam, which can be used as part of the steam turbine cycle. 相似文献
19.