Circulating fluidized bed refuse incineration boiler and refuse incineration method thereof

Abstract

The invention relates to a circulating fluidized bed refuse incineration boiler and a refuse incineration method thereof. The boiler comprises a steel framework and a hearth body, a middle flue, a tail flue and a boiler barrel which are arranged on the steel framework. A smoke separation device and a return device are arranged in the middle flue; the smoke separation device and the return device are respectively connected with the hearth body; the tail flue and the smoke separation device are connected; vapor-water systems are arranged in the hearth body and the tail flue; the vapor-water systems are connected with the boiler barrel; the hearth body comprises an upper water cooled wall hearth, a lower insulation hearth and a middle insulation hearth, wherein the middle insulation hearth and the lower insulation hearth are hearth structures without heating surfaces and are used for preventing heat loss generated after refuse is burnt so as to make the heat used for preheating and igniting new put refuse. The refuse incineration boiler and the incineration method thereof reduce the operating cost of a refuse power station and enhance the adaptability to refuse quality changes.

Description

technical field [0001] The invention relates to a garbage power generation equipment, in particular to a circulating fluidized bed garbage incineration boiler and a garbage incineration method. Background technique [0002] At present, with the acceleration of urbanization and the improvement of people's living standards, urban residents' domestic garbage disposal has become an important part of environmental protection. In 2007, the total amount of garbage in my country's 655 cities reached 125 million tons. Many cities are facing "garbage siege", and the harmless disposal of garbage has become one of the most important environmental protection issues. [0003] Among the three methods of harmless waste treatment, waste incineration power generation is the treatment method that is closest to the three principles of harmlessness, reduction and recycling of waste. Therefore, it has begun to develop in my country. Among them, the equipment investment of circulating fluidized b...

AI Technical Summary

Problems solved by technology

Due to the current high coal price in my country, the operating cost of waste-to-energy plants has increased significantly, and some are even on the verge of losing money

The application number is "00108520.4", and the waste incineration boiler disclosed in the Chinese invention patent application document named "Municipal Domestic Garbage Internal Circulation Different Density Fluidized Bed Incineration Boiler" does not involve the heat insulation problem of its combustion chamber; the application number is "200410009082.2 ", the CFB boiler disclosed in the Chinese invention patent application titled "A Circulating Fluidized Bed Boiler for Burning Household Garbage", although a membrane-type water-cooled wall is installed in the combustion chamber to reduce heat absorption, ensuring that the combustion chamber Combustion temperature guard combustion zone, but the structure and composition of the guard combustion zone are not detailed. From the public documents, it is impossible to judge how the guard combustion zone can reduce the heat absorption of the membrane water wall and ensure the combustion temperature in the combustion chamber.

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