Carbon sequestration reinforced recycled aggregate preparation device and method based on returned material crushing

Abstract

The invention relates to the technical field of recycled aggregate recycling, in particular to a carbon sequestration reinforced recycled aggregate preparation device and method based on returned material crushing, and the device comprises a screw conveyor, a material throwing rotor, a screening rotary drum, a returned material rotary drum and a carbon dioxide input pipe; the spiral conveyor comprises a raw material inlet, a fine aggregate inlet and a discharge hole; the screening rotary drum comprises an inner drum body and an outer drum body, and the throwing rotor is used for throwing aggregates into the inner drum body in an accelerated manner, so that the aggregates collide with one another and are crushed; the spiral conveyor is sleeved with the material returning rotary drum, the fine aggregate inlet is located in the material returning rotary drum, and material returning blades of the material returning rotary drum drive fine aggregate to be fed into the spiral conveyor from the fine aggregate inlet; and the inlet end of the carbon dioxide input pipe is communicated into the screening rotary drum. The aggregates collide with one another to be crushed and shaped and fully react with carbon dioxide in the process, so that carbon dioxide is absorbed and solidified, carbonization of the recycled aggregates is enhanced, and the high-quality recycled aggregates are prepared.

Description

technical field [0001] The invention relates to the technical field of recycled aggregate recycling, in particular to a device and method for preparing carbon-fixing-strengthened recycled aggregate based on returning material crushing. Background technique [0002] Since the first industrial revolution, human carbon emissions have continued to increase. Scientists have conducted a lot of research on human excessive carbon emissions and given its hazards and predictions. Therefore, it is urgent to solve the carbon emissions problem. According to statistics, about 7% of the carbon dioxide gas in the air comes from the emissions from the construction industry. The raw materials for concrete manufacturing come from high-temperature sintering of raw materials such as marble. This sintering process will emit a large amount of carbon dioxide into the air. Aggregate is one of the important raw materials for making concrete. If it can be recycled and reused from waste building materi...

AI Technical Summary

Problems solved by technology

At present, most of the research on carbonized recycled aggregate is in the laboratory stage, and the device still has the problem of insufficient sealing, and the risk of carbon dioxide poisoning of the operator cannot be ignored

At the same time, if the recycled aggregate is to be pressurized and sealed in engineering, not only the equipment sealing cost is high, but also the pressurization will consume too much energy, which runs counter to the concept of green development

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