Two-stage sludge drying and energy recovering system and drying process thereof

Abstract

The invention discloses a two-stage sludge drying and energy recovering system and a drying process thereof. The two-stage sludge drying and energy recovering system comprises a sludge storage chamber. The two-stage sludge drying and energy recovering system is characterized in that an exhaust port of the sludge storage chamber is connected with a deodorization reactor through a first fan; a sludge outlet of the sludge storage chamber is connected with a sludge inlet end of a drier through a sludge pump; a sludge forming machine is arranged at the sludge outlet end of the drier; and a belt drier is arranged at the sludge discharge hole of the sludge forming machine. The system adopts a two-stage drying manner; and the sludge of which the moisture content is 70-85% is finally dried into granular sludge of which the solid content is 70-90%. The system is high in heat transfer efficiency, small in carrier gas quantity, and low in heat loss, and does not generate dust at all; the energy recovering system is efficient and energy-saving; the energy saving rate achieves about 30%, and the drying rate and the energy-saving rate are obviously improved from the aspect of actual use effect.

Description

technical field [0001] The invention relates to the technical field of sludge drying, in particular to a two-stage sludge drying and energy recovery system and its drying process, in particular to its system connection structure. Background technique [0002] With the rapid development of my country's economy, the pace of urbanization and small town construction continues to accelerate, the discharge of industrial and domestic sewage is increasing, and the amount of sludge that follows (including sludge from drainage pipes, pumping stations and sewage treatment plants ) is getting bigger and bigger. As a by-product of sewage treatment, sewage treatment plant sludge will cause serious secondary pollution if it is not treated in time. At present, the main treatment technologies for sludge include landfill, composting, incineration, and utilization of building materials, etc., and these treatment and disposal technologies must go through the process of drying. The existing dryi...

AI Technical Summary

Problems solved by technology

The existing drying technology and equipment mainly have shortcomings such as relying on dry sludge back-mixing, low heat transfer efficiency of the heating system, large heat loss, and high dust volume, which restrict the development of sludge treatment and disposal technology. Therefore, the development of new sludge Drying equipment plays a vital role in solving the current increasingly serious sludge problem

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