A box-type vacuum drying device for urban sludge

A vacuum drying device and sludge technology, applied in the direction of dewatering/drying/concentrating sludge treatment, etc., can solve the problems of poor drying effect and odor overflow, and achieve the effect of good drying effect, small latent heat of vaporization and large specific surface area.

Active Publication Date: 2021-12-24
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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Problems solved by technology

[0007] But above-mentioned technical scheme still exists the problem of stench overflowing, and drying effect is poor

Method used

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  • A box-type vacuum drying device for urban sludge

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Embodiment Construction

[0033] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] Such as figure 1 As shown, a box-type vacuum drying device for urban sludge of the present invention includes a drying box 4, and the box body of the drying box 4 is an insulated box body. The drying box 4 is connected with a vacuum pump 10, and the vacuum pump 10 is used to control the vacuum degree in the drying box 4.

[0035] An air distribution plate 2 is arranged inside the drying box 4 to divide it into an upper material delivery area and a lower air supply area, and the air distribution plates 2 are evenly arranged with air distribution channels. There is a material conveying system in the material conveying area, and a finned heat exchanger 1 is installed in the air supply area. The gas entering the air supply area is heated by the finned heat exchanger 1 and then introduced through the air distribution channel ...

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Abstract

The invention discloses a box-type vacuum drying device for urban sludge, which comprises a drying box connected with a vacuum pump; the drying box is provided with an air distribution plate to divide it into an upper material delivery area and a lower air supply area The air distribution channel is arranged on the air distribution plate; the material conveying system is arranged in the material conveying area, and the heat exchanger is installed in the air supply area. The air channel leads into the material conveying area to heat and dry the materials conveyed by the material conveying system; the drying box is also connected with a hot air circulation system. The invention is suitable for drying urban sludge, provides favorable material conveying conditions and heat medium pressure, temperature, and wind conditions for sludge drying, improves sludge drying rate, and has good environmental protection without foul smell in the drying process.

Description

technical field [0001] The invention relates to the technical field of sludge drying, in particular to a box-type vacuum drying device for urban sludge. Background technique [0002] Sludge is a high-moisture porous medium substance, and the moisture content of untreated sludge is as high as 95%. Especially urban sludge, because its combined moisture and free moisture are larger than ordinary dry matter, and its physical form is like a micelle, with strong cohesion, so it is not easy to dry, and it consumes a lot of energy, and it also emits foul smell and pollutes the environment. With the increasingly severe environmental protection requirements and the accelerated pace of urbanization, urban sludge treatment has become a problem that needs to be solved urgently. [0003] Traditional treatment methods and disposal systems generally dehydrate the sludge first, and the dehydrated sludge is usually treated by agricultural use, landfill or incineration. In these types of tre...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/13
CPCC02F11/13
Inventor 苏钰杰关树义赵廷林
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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