High-efficiency low-carbon IGCC (integrated gasification combined cycle) system

The invention relates to IGCC (integrated gasification combined cycle), and provides an efficient low-carbon IGCC system in order to reduce carbon emission of the IGCC system, which comprises a coal grinding device, a gasification device, a dust removal washing device, a desulfurization device, a decarbonization device, a hydrogen-rich gas turbine and a steam turbine which are connected in sequence, the nitrogen end of the air separation device is connected with the coal grinding device, and the oxygen end of the air separation device is connected with the gasification device; and the carbon capture device is connected with the exhaust end of the decarburization device. The efficient low-carbon IGCC system can effectively capture carbon dioxide generated by the system, and carbon emission is reduced. 本发明涉及IGCC，为了减少IGCC系统的碳排放，提供了一种高效低碳的IGCC系统，包括依次连接的磨煤装置、气化装置、除尘洗涤装置、脱硫装置、脱碳装置、富氢燃机以及汽轮机；还包括空分装置，空分装置的氮气端与磨煤装置连接，空分装置的氧气端与气化装置连接；还包括碳捕集装置，碳捕集装置与脱碳装置的排气端连接。本发明的高效低碳的IGCC系统，能够有效地捕集系统所产生的二氧化碳，减少碳排放。