Pyrolysis melting kiln for manufacturing vitrified ceramsite through biomass heat source

Abstract

The invention relates to a pyrolysis melting kiln for manufacturing vitrified ceramsite through a biomass heat source, and relates to the field of environmental protection equipment. A pyrolysis reaction kettle, a drying rotary kiln and a sintering rotary kiln are all installed in a kiln shell, one end of the drying rotary kiln is provided with a flue gas outlet and a drying feed port, a flue gas exhaust fan is arranged in the flue gas outlet, one end of the sintering rotary kiln is provided with a product outlet and a pyrolysis gas inlet, the other end of the drying rotary kiln communicates with the other end of the sintering rotary kiln, one end of the pyrolysis reaction kettle is provided with a pyrolysis gas outlet and a biomass feeding port, a pyrolysis exhaust fan is fixed in the pyrolysis gas outlet and communicates with the pyrolysis gas inlet, the side wall of the pyrolysis gas outlet is provided with a slag discharging hole, the kiln shell reduces heat loss, a high firing temperature can be achieved, the ceramsite is in a rolling state of granulation in the rotary kiln and cannot be mutually fused, the kiln wall can bear higher firing temperature, the pyrolysis gas and materials are fully contacted in a countercurrent manner, the efficiency is high, the pyrolysis gas provides heat energy for firing, negative pressure pyrolysis is carried out in the pyrolysis reaction kettle, the heat supply capacity is improved, and the space and heat energy utilization rate is high.

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...

AI Technical Summary

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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