Fly ash air-cooling drying system and process

Abstract

The invention discloses a fly ash air-cooling drying system and process. The low-temperature drying system comprises an air-cooling circulating drying device and a finished product bin. According to the fly ash air-cooling drying process, circulating air at the temperature of 70 DEG C or below in the air-cooling circulating drying device is used for carrying out drying treatment on washed fly ash and related products of the fly ash, so that generation of heat-sensitive pollution factors such as dioxin can be avoided, and the defects of complicated equipment system, high energy consumption, small terrestrial heat, large-scale dust raising, high-index atmospheric emission and the like accompanying a traditional high-temperature drying process can be avoided, a discharged finished product material does not need to be cooled or maintained additionally and can directly enter a downstream process or be stored and the like, and the fly ash air-cooling drying system and process have the characteristics of safety, high efficiency, low consumption, energy conservation, low carbon, environmental protection, high comprehensive economy and the like.

Description

technical field [0001] The invention belongs to the field of fly ash disposal, and in particular relates to an air-cooled drying system and process for fly ash, which is mainly used for drying fly ash after water washing and its related products or high heat-sensitive materials. Background technique [0002] At present, the washing and drying unit of fly ash in incineration process is an important part of the washing treatment line. The general drying method is to use high-temperature steam, flue gas and other heat sources to process the washed fly ash materials such as drums, drums, and coils. Paving heating and other high-temperature drying processes, such as Chinese patent CN 206897216 U discloses a fly ash dry and wet material mixer, a fly ash drying system and a fly ash processing system, including a cylinder, the cylinder is provided with a spindle , the main shaft is provided with multiple sets of coulter assemblies, one end of the outer side of the cylinder is provid...

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Problems solved by technology

[0004] In view of the above-mentioned defects existing in the prior art, the object of the present invention is to provide a fly ash air-cooled drying system and process, which uses the humidity difference of the circulating air in the air-cooled circulation drying device to wash the fly ash and its related products below 70°C. Dehumidification and drying of products or highly heat-sensitive materials can not only avoid the generation of heat-sensitive pollution factors such as dioxins, but also avoid the complex equipment and systems, high energy consumption, low geothermal heat, large-scale dust and high-level atmospheric emissions associated with traditional high-temperature drying processes. Disadvantages: No cooling or additional maintenance is required after discharge, and it can directly enter downstream processes or storage, etc. It has the characteristics of safety, high efficiency, low consumption, energy saving, low carbon, environmental protection, and high comprehensive economy.

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