A pyrolysis melting kiln for producing vitrified ceramsite with biomass heat source

Abstract

The invention relates to a pyrolysis melting kiln for producing vitrified ceramsite with a biomass heat source, and relates to the field of environmental protection equipment. The pyrolysis reaction kettle, the drying rotary kiln and the firing rotary kiln are all installed in the kiln shell, and one end of the drying rotary kiln is There is a flue gas outlet and a drying feed port. There is a flue gas exhaust fan inside the flue gas outlet. One end of the firing rotary kiln has a product outlet and a pyrolysis gas inlet. The other end of the drying rotary kiln is connected to the other end of the firing rotary kiln. One end of the reactor has a pyrolysis gas discharge port and a biomass feed port. A pyrolysis exhaust fan is fixed inside the pyrolysis gas discharge port and communicated with the pyrolysis gas inlet. The side wall has a slag discharge hole. The kiln shell reduces heat loss and can achieve higher firing temperatures. The ceramsite is in the rolling state of granulation in the rotary kiln, and will not melt together, and the kiln wall can withstand high firing temperature. The pyrolysis gas and the material are in full contact with the countercurrent, and the efficiency is high. The pyrolysis gas provides heat energy for firing, and the negative pressure pyrolysis in the pyrolysis reactor increases the heat supply capacity. High utilization rate of space and heat energy.

Description

technical field [0001] The invention relates to the field of environmental protection equipment, in particular to a pyrolysis melting kiln for producing vitrified ceramsite from a biomass heat source. Background technique [0002] In order to avoid the pollution of hazardous waste substances, the original treatment of hazardous waste usually adopts cement solidification or chelating agent solidification. The problem of the above solidification method is that it is large in size and will be weathered after long-term storage, which will still pollute the environment. It needs to be established Higher cost dedicated landfill. [0003] At present, vitrification (vitrification is also called vitrification) treatment of general industrial solid waste, especially hazardous waste such as fly ash, is a treatment method to achieve solid waste reduction, recycling and harmlessness. Hazardous solid waste is vitrified to form general solid waste, which can be stored normally without sec...

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Problems solved by technology

[0002] In order to avoid the pollution of hazardous waste substances, the original treatment of hazardous waste usually adopts cement solidification or chelating agent solidification. The problem of the above solidification method is that it is large in size and will be weathered after long-term storage, which will still pollute the environment. It needs to be established Higher cost dedicated landfill

Limited by the material cost of drying kiln, firing kiln and pyrolysis reactor, the temperature in the cavity should not be too high, so it cannot meet the requirements of some high-temperature firing products such as fly ash firing vitrified ceramsite (requires more than 1300 degrees Celsius)

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