The invention relates to an urban garbage gasification and energy utilization
system and method, specifically to a garbage material gasification and energy utilization
system composed of a garbage gasification reaction device, a gasifying agent generation device, a
fuel gas purification treatment device, a garbage crushing,
drying and airtight feeding device, an airtight deslagging device, an
oxidizing agent input device and the like, and an urban garbage gasification and energy utilization method. The
system is characterized in that the gasifying agent generation device generates a hypoxic high-temperature gasifying agent which is required by garbage gasification and of which the temperature can be effectively controlled according to garbage materials and
process requirements, garbage materials are directly contacted and acted with the hypoxic high-temperature gasifying agent to generate a gasification reaction, and the garbage gasification reaction device provides a space structure and
reaction conditions of the gasification reaction. According to the gasification and energy utilization requirements, while the gasification reaction is maintained and the
fuel gas is generated andoutput, the hypoxia high-temperature gasifying agent can be output as high-temperature
heat energy, so that clean and efficient gasification and energy utilization are realized; and the system and themethod have the characteristics of high gasification and energy efficiency, no dioxin generation, suitability for urban garbage containing
hydrocarbon components and the like.