System for producing synthesis gas by performing high-temperature domestic waste gasification based on pre-drying and method for producing synthesis gas

Abstract

The invention discloses a system for producing synthesis gas by performing high-temperature domestic waste gasification based on pre-drying. The system comprises a drying device, a grate gasifier, a reforming purification chamber, a heat exchange chamber, a gasified blower, an after-burning fan, a drying fan, an induced draft fan, a dynamic wave scrubbing tower 1#, a dynamic wave scrubbing tower 2#, a gas storage tank and a waste storage pit, wherein the top of the drying device, the dynamic wave scrubbing tower 2#, the drying fan, the heat exchange chamber and the bottom of the drying device are sequentially communicated to form a cycle through pipelines; the drying device, the grate gasifier, the reforming purification chamber, the heat exchange chamber, the dynamic wave scrubbing tower 1#, the induced draft fan and the gas storage tank are sequentially communicated with one another through the pipelines; the waste storage pit, the after-burning fan, the heat exchange room and the reforming purification chamber are sequentially communicated through the pipelines; the waste storage pit, the gasified blower, the heat exchange chamber and the grate gasifier are sequentially communicated through the pipelines. According to the system disclosed by the invention, solid wastes are pre-dried by the drying device, the moisture content of the wastes entering the grate gasifier is reduced, and the heat value of the synthesis gas is improved; moreover, the gas treatment cost is saved.

Description

technical field [0001] The invention relates to a system for producing synthesis gas by high-temperature gasification of domestic garbage based on pre-drying and a method for producing synthesis gas, belonging to the field of waste solid utilization. Background technique [0002] With the rapid growth of China's economy and the improvement of urbanization level, the generation of solid waste, especially urban domestic waste, has also increased rapidly, causing serious environmental and social problems. Sanitary landfill and waste incineration are the main means of domestic waste disposal in my country at present. They have played a positive role in alleviating environmental and social problems caused by excessive waste in a certain period of time, but sanitary landfill cannot effectively utilize the waste in domestic waste. The domestic waste will ferment in the landfill pit to produce leachate and methane gas. The leachate will pose a long-term threat to the surrounding soil...

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