Drying system and drying method thereof

Abstract

The invention relates to the technical field of sewage treatment, in particular to a drying system and a drying method. The drying system comprises a fan, drying equipment, a biochemical aeration tank and a connecting pipeline, wherein the fan is connected with the drying equipment and the biochemical aeration tank through the connecting pipeline, and the drying equipment is connected with the biochemical aeration tank through the connecting pipeline. According to the invention, the structure is simple, the energy of the fan can be effectively utilized to dry materials, and the system has important significance on effective utilization of the energy of the fan; according to the drying method, the fan serves as a main energy supply device for material drying, the auxiliary heating assembly provides auxiliary heating, the process is simple, operation is easy and convenient, and the industrial application requirement can be met; and in the drying process, a closed system is formed among the fan, the drying equipment and the biochemical aeration tank, harmful gas cannot escape, and organic waste gas can provide a carbon source for microorganisms in the aeration tank, so that the system and method are economical and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a drying system and a drying method thereof. Background technique [0002] With the continuous acceleration of my country's urbanization process, according to statistics, my country's sludge production has exceeded 60 million tons in 2019 (calculated at a moisture content of 80%), and it is expected that my country's annual sludge production will exceed 90 million tons in 2025. Sludge is enriched in sewage heavy metals, refractory organic matter, persistent organic matter, microplastics and other pollutants, as well as nutrients such as nitrogen and phosphorus. It has dual attributes of resource and pollution at the source. If the sludge Improper handling can have adverse effects on the environment and the health of living organisms. At the same time, the waste water, sewage or waste liquid produced in the industrial production process, with the rapid development of ind...

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Problems solved by technology

[0003] In the prior art, the sludge treatment method usually uses machine press filtration to remove part of the water in the sludge, and then dries it. However, for the treatment of concentrated water, the salt content of the concentrated water is relatively low compared to crystallization. Low, in order to achieve zero emissions, usually through evaporation and concentration to lose a lot of water before crystallization treatment, concentrated water evaporation is an indispensable part of crystallization treatment, whether it is sludge drying or concentrated water evaporation and concentration, it needs to consume A lot of energy, complex equipment, high operating costs, and easy to cause pollution problems

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