IGCC整體煤氣化聯(lián)合循環(huán)發(fā)電系統(tǒng)的數(shù)值模擬畢業(yè)設(shè)計
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- 摘 要
整體煤氣化聯(lián)合循環(huán)和整體煤氣化燃料電池聯(lián)合循環(huán)都是正在開發(fā)的高效的發(fā)電技術(shù)。然而，IGCC/IGFC在按最高理論情況下的總的熱效率仍是低于52％。為了獲得更高的發(fā)電效率，我們實驗室提出了先進(jìn)的IGCC（A-IGCC）或先進(jìn)的IGFC（A-IGFC）系統(tǒng)。這種系統(tǒng)通過燃?xì)廨啓C(jī)或燃料電池，利用㶲回收的概念來用于煤和生物質(zhì)余熱的回收利用。與此同時，相應(yīng)的系統(tǒng)，一種新的高密度三床聯(lián)合循環(huán)流化床氣化爐，這種氣化爐有下行裂解爐，鼓泡流化床，煤焦氣化爐和立管（上升管）燃燒器組成，進(jìn)而取代傳統(tǒng)的氣化爐的想法被提了出來。例如，氣流床氣化爐等。新的系統(tǒng)將更有效的利用燃?xì)廨啓C(jī)中的余熱或燃料電池和在燃燒室中的煤和生物質(zhì)中未反應(yīng)的碳的分解和氣化而產(chǎn)生的熱量。在這個簡短的回顧，充分的陳述和討論了高密度TBCFB氣化爐的發(fā)展的優(yōu)勢以及在未來中的挑戰(zhàn)。
Abstract
Coal-fired Integrated Gasification Combined Cycle(IGCC) and Integrated coal Gasification Fuel-cell Combined cycle(IGFC) are being developed as high-efficiency electric power generation technology . However, the highest theoretical gross thermal efficiency of the conventional IGCC/IGFC is still below 52%. In order to obtain higher power generation efficiency ,an advanced IGCC(A-IGCC) or advanced IGFC(A-IGFC) system making use of the exergy recuperation concept by recycling waste heat from gas turbine or fuel cells for steam gasification of coal and biomass was proposed in our laboratory. Corresponding to this system, a novel high-density triple-bed combined circulating fluidized bed (TBCFB) gasifier, composed of a downer pyrolyzer, a bubbling fluidized bed char gasifier, and a riser combustor, was proposed to replace traditional gasifiers such as the entrained flow bed gasifier. The new system is expected to more effectively utilize the waste heat from gas turbines or fuel cell sand the heat produced by the combustion of the unreacted char in the riser combustor for pyrolysis and gasification of coal and biomass. In this short review, the advantages and future challenges in the development of high-density TBCFB gasifier are presented and discussed.2010 Chinese Society of Paticuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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