SYNTHESIS-GAS SENSIBLE HEAT RECOVERY APPARATUS AND RECOVERY METHOD, AND GASIFIER

摘要

Provided are a synthesis-gas sensible heat recovery apparatus and method, and also provided is a gasifier comprising said sensible heat recovery apparatus; the sensible heat recovery apparatus is provided with multiple stages of spraying apparatuses; by means of a first injection apparatus (61), a low-temperature region near a heat exchange surface and a core high-temperature region located in the middle of the low-temperature region are formed upstream of the radiation heat exchange chamber (3); by means of radiation, heat is exchanged between the core high-temperature region and the heat exchange surface, effectively improving the efficiency of heat exchange. The sensible heat recovery apparatus is also provided with multiple stages of spraying apparatuses; thus a plurality of regions is formed on the flow path of the gasification synthesis gas, thereby controlling the division of regions; in addition, a flow-guiding ash removal structure is provided, improving, by means of guiding the flow, the path of motion of ash particles of different particle sizes in the gas flow, reducing the possibility of large particle ash moving toward the inner cylinder wall, and reducing the entrainment of small particle ash in the synthesis gas.