Roller fire grate garbage incinerator and preheating combustion method

Abstract

The invention discloses a roller type garbage incinerator and a preheating combustion method, belonging to garbage incineration equipment and technology used in the technology of solid waste treatment. A roller fire grate serves as a combustion device and is combined with a water cooled wall, a hearth, a superheater, an economizer, an air preheater and the like to form the technology and the device capable of processing garbage and recovering heat energy thereof. The roller fire grate is characterized in that the front part of the roller fire grate is provided with a preheating and drying grid which can fully preheat and dry garbage and is favorable for garbage to fully combust on the roller fire grate. The roller fire grate is divided into a drying and combusting section and an after-combustion section, wherein the drying and combusting section is aslant arranged in the stair-stepping mode, and the after-combustion section is arranged horizontally. The side wall of the hearth is provided with an oxygen-enriched air nozzle; according to the conditions of garbage heat value, moisture content and the like, oxygen-enriched air is introduced into the hearth by the oxygen-enriched air nozzle for supporting combustion to improve the garbage combustion temperature.

Description

technical field [0001] The invention relates to combustion equipment, in particular to a drum grate garbage incinerator for municipal domestic garbage incinerators and a preheating combustion method thereof. Background technique [0002] In the past 20 years, my country's economy has developed rapidly, the scale of cities has continued to expand, and the process of urbanization has been rapid. According to statistics, the proportion of my country's urban population has increased from 27% in 1991 to 43% in 2005, and the number of cities has increased from 353 in 1986 to 657 in 2005. With the process of urbanization and the expansion of scale, the increase of urban population, the opening of the market, the change of residents' consumption structure and the development of tourism, the generation and accumulation of urban garbage have increased year by year. It is predicted that by 2030, my country's waste removal volume will reach 185-203 million tons. In the past, landfill w...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the existing garbage incineration technology, such as insufficient drying section, insufficient drying of garbage before combustion, and poor turning effect, and provide a drum grate garbage incinerator and its preheating combustion method. Garbage with low and high moisture content has good adaptability, and can fully burn up domestic waste, thereby reducing pollution emissions during the combustion process

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