关键词: 垃圾焚烧, 超高压, 再热, 汽温

Abstract: In recent years, the scale of domestic waste incineration projects in China has continued to expand, industry competition has intensified, the superposition of state subsidies and environmental protection requirements have increased, and enterprises need to achieve cost reduction and enhance efficiency through technological innovation. Improving steam parameters, optimizing waste heat utilization efficiency and adopting high speed steam turbine are the key technical paths. Among them, reheat technology in ultra-high pressure furnace significantly improves power generation efficiency by improving steam parameters, and has become a research hotspot in the field of waste incineration. The reheat incineration line in a 1 000 t/d ultra-high pressure furnace was taken as an example to analyze its technical scheme and operation effect. The main steam parameter of the project was 13 MPa, 450 ℃, and a primary intermediate reheating system was adopted. After putting into operation, the power generation per ton of garbage was increased to 554 kWh/t, an increase of 237 kWh/t compared with before the transformation, and the income was increased by more than 22 million yuan. The results showed that ultra-high pressure reheating technology could significantly improve the economic and environmental benefits of waste incineration plants.

Key words: waste incineration, super-high pressure, reheating, steam temperature