High-temperature roasting solid waste treatment device and method

Abstract

The invention discloses a high-temperature roasting solid waste treatment device and method. The device comprises a conveying device, a drying device, a heating device, a roasting device, a homogenizing device, a first cooling device, a second cooling device and a third cooling device, the conveying device is covered with a solid waste treatment finished product particle layer; the solid waste treatment finished product particle layer is covered with a particle layer to be subjected to solid waste treatment; the homogenizing device is used for homogenizing particles treated by the roasting device; the roasting device is connected with the first cooling device; the heating device is connected with the second cooling device; and the drying device is connected with the third cooling device. According to the high-temperature roasting solid waste treatment device and method disclosed by the invention, silicon oxide in solid waste is in a molten state through high temperature in an oxidizing atmosphere, and then is gradually cooled, so that the silicon oxide is bonded with metal elements in the solid waste; and the high-temperature roasting solid waste treatment device and method have the advantages that metal ions can be prevented from being released and entering water bodies or soil, the energy consumption is low, the treatment capacity is large, and the particles subjected to high-temperature roasting are high in strength and can be recycled.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a high-temperature roasting solid waste treatment device and method. Background technique [0002] Solid waste treatment, the full name of solid waste treatment, usually refers to the use of physical, chemical, biological, physical and biochemical methods to transform solid waste into a process suitable for transportation, storage, utilization or disposal. The goal of solid waste treatment is Harmless, reduced, and resourceful. [0003] However, the amount of sludge produced by urban sewage treatment plants is large, and the content of organic matter in urban sludge is low. After biological treatment, drying, and weight reduction, it can only be stockpiled, and energy recovery from sludge incineration cannot be carried out. However, in sludge Contains harmful substances such as heavy metals, and stockpiling will cause pollution. Due to the large number of people a...

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Problems solved by technology

[0013] Sintering, the advantage of this method is that the technology is mature, and it is a common process in the metallurgical industry. The disadvantage is that harmful metal elements such as lead and zinc in the solid waste return to the process route, forming lead and zinc accumulation, so the use of this method is limited, and for hundreds of 10,000 tons of solid waste per year, this method has poor economy and low feasibility

[0014] Roasting, such as using shaft furnace or rotary kiln, but the disadvantages of shaft furnace or rotary kiln are: high energy consumption, large amount of tail gas purification, so high cost; small processing capacity, the processing capacity of a rotary kiln or shaft furnace is only 10,000 tons Therefore, it is not possible to use rotary kiln or shaft furnace to treat huge amounts of solid waste such as urban sludge, river and lake silt or red mud; the roasting temperature is low, and the strength of the finished particles is low, so the finished particles are useless

The temperature field is not uniform, the quality of the final product particles varies widely, and the solid waste particles collide with each other during thermal processing, resulting in a high pulverization rate

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