Two-stage sludge drying equipment system

Abstract

The invention relates to a two-stage sludge drying equipment system. A sludge filler module is mounted at the rotating shaft end of the upper left side of a first-stage spiral drying module; the first-stage spiral drying module comprises an inclined drying cylinder and a built-in spiral feeding device, and an interlayer is formed in the wall of the drying cylinder; a strip extruding module is located below the first-stage spiral drying module, a second-stage tower-type cleaning drying module is installed below the strip extruding module, and a discharge port of the strip extruding module is the feed port of the second-stage tower-type cleaning drying module; the second-stage tower-type cleaning drying module comprises a vertical metal cylinder, an internal cleaning device and an upper hotair inlet; a tail gas purification module comprises a purification chamber as well as a sprayer, activated carbon and a UV ultraviolet light source which are located in the purification chamber, and two induced draft fans introduce waste gas of the first stage and the second stage into the purification chamber respectively. The system has higher drying rate and lower energy consumption.

Description

technical field [0001] The invention relates to a direct and indirect two-stage sludge drying equipment system. Background technique [0002] In recent years, with the development of urbanization and industrialization, the amount of municipal sewage treatment has increased dramatically, resulting in a large amount of sludge to be further disposed of. Since the moisture content of sludge is about 80%, such a high moisture content is not good for sludge transportation or other terminal treatment. For example, sludge incineration requires its moisture content not to be higher than 40%, and the moisture content of sludge when used as cement filler It is not higher than 20%, so it is necessary to pretreat and dry the sludge to reach an acceptable moisture content. [0003] The current mainstream sludge drying process is direct drying technology and indirect drying technology. The main drying methods are: tunnel drying and box drying, drum drying, belt drying, horizontal paddle ...

AI Technical Summary

Problems solved by technology

The disadvantage of box drying is that the operation is complicated and the corresponding operation cost is high, and its structure is complicated and the counterfeiting is also expensive

The disadvantages of tunnel drying are that the materials cannot be dispersed, the drying time is long, and the energy consumption is serious.

Although solar drying is clean and hygienic, it has large dispersion, low calorific value, large investment in equipment and small temperature rise, indirectness and instability.

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