Sludge drying system and sludge drying method

Abstract

The invention provides a sludge drying system, which comprises a conveying apparatus, a tempering apparatus, a dehydration apparatus and a drying apparatus. The drying apparatus comprises a housing, the housing comprises a separation wall used for dividing the housing into a first drying chamber and a second drying chamber, and a communication port is formed on the separation wall and used for communicating the first drying chamber with the second drying chamber. A feed inlet and an air outlet are arranged on the upper part of the first drying chamber, and a discharge hatch is arranged on the circumferential wall of the first drying chamber. An air inlet is arranged on the circumferential wall of the second drying chamber. A stirring apparatus is arranged in the first drying chamber, wherein, the stirring apparatus comprises a rotation shaft and a stirring component fixed on the rotation shaft, and the stirring component is used for scraping the sludge near the communication port. An air blast apparatus is capable of communicating with the second drying chamber when passes through the air inlet. The invention also provides a sludge drying method by using the sludge drying system.

Description

technical field

[0001] The present invention relates to the field of sludge drying, in particular to a sludge drying system used to dry sludge with a water content of about 90% or more, so as to obtain sludge with a water content of about 40% or less, and a sludge drying system A sludge drying method using the sludge drying system is disclosed. Background technique

[0002] The treatment of sewage in modern cities is essential, and with the treatment of sewage, a large amount of sludge will be produced. At present, sewage treatment plants generally use the method of concentration or dehydration to pre-treat the sludge in order to reduce the moisture content of the sludge from more than 90% to 60-80%, and then landfill and solidify the treated sludge or drying treatment. Landfills tend to ferment sludge and cause secondary environmental pollution. However, existing solidification or drying equipment usually has low drying efficiency and high energy consumption. It is diffic...

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