報告書番号

M09016

タイトル（和文）

IGCC用高効率ガス精製システムの開発 －発電効率解析に基づく最適システムの構築と開発方策の提案－

タイトル（英文）

Development of Gas Cleaning System for highly-efficient IGCC - Proposal for scale-up scheme of optimum gas cleaning system based on generating efficiency analysis -

概要 （図表や脚注は「報告書全文」に掲載しております）

石炭ガス化複合発電(IGCC)の高効率化に向け，当研究所が開発した各種不純物の乾式除去技術を適用したガス精製システムを構築し，その発電出力を試算した。全ての不純物を乾式で除去する乾式ガス精製は，設備の簡素化と効率に優れており，最終的な開発目標と考えられるが，実用化にはハロゲンおよび水銀の除去プロセスの段階的なスケールアップ検討を実施する必要がある。一方，湿式ガス精製の脱硫部分を乾式脱硫に置き換えたハイブリッドガス精製は，早期の大型化が可能で，乾式に次ぐ効率も期待できることから，現状で最適なガス精製システムと考えられた。

概要 （英文）

Gas cleanup system is required to establish the Integrated Gasification Combined Cycle (IGCC) power plant. CRIEPI has been developing various sorbents for removal sulfur compounds (H2S, COS), halides (HCl, HF) and mercury (Hg) in hot coal-derived gas. In this work, two kinds of gas cleanup systems for the highly efficient and environmental IGCC were suggested by conceptual design with generating efficiency analysis.
One of the gas cleanup systems was consisted of only impurity removal process with developed sorbents. This dry gas cleanup system was simplified rather than conventional wet gas cleanup system by reducing of heat exchanger and water treatment facility. The efficiency analysis indicated that introducing dry gas cleanup system brings around 1.5 percentage point improvement of power generating efficiency. But this system was required practical equipment design for each removed impurities and verification of sorbents performance with scale-up test.
The other was hybrid-type gas cleanup system arranged water scrubber and hot desulfurization process in series. This system was simplified by converting the wet sulfur absorbing units operated at low temperature into desulfurization sorbent loaded reactor. Because condensation of steam in coal-derived gas was avoided through the hybrid-type gas cleanup system, the power generating efficiency was also increased by 0.9 percentage point than wet gas cleanup system. As the hot desulfurization technology was in more advanced stage than halide and mercury removal, the hybrid-type gas cleanup system had advantages in early realization of the highly efficient and environmental IGCC.

報告者

キーワード