Compact aqueous solid material drying device

Abstract

The invention relates to a compact aqueous solid material drying device which comprises a stirring mixer and N spiral conveying drying devices. The stirring mixer is used for stirring aqueous solid materials with carrying balls. The numbers of the N spiral conveying drying devices are S1, S2...Sn respectively in sequence, wherein n is larger than or equal to one but smaller than or equal to N and N is larger than or equal to two. Air drying is carried out on the materials in the spiral conveying drying devices. A material inlet of the S1 is communicated with an outlet of a material and carrying ball mixture of the stirring mixer. A material outlet of the Sn is communicated with a sieving device. The Sn and the Sn-1 are arranged in a crossed mode and opposite in inclination directions, or the Sn is located below the Sn-1, so that a material outlet of the Sn-1 is higher than a material inlet of the Sn and the material outlet of the Sn-1 is communicated with the material inlet of the Sn through a discharging pipe. The sieving device is communicated with a carrying ball returning pipeline. The carrying ball returning pipe is used for returning the sieved carrying balls to the stirring mixer. The number of the carrying balls is multiple. The carrying balls are mixed with the aqueous solid materials under the working state and exist in a spiral air flow channel of the stirring mixer and / or spiral air flow channels of all the spiral conveying drying devices.

Description

technical field [0001] The invention belongs to the field of drying equipment. Background technique [0002] Generally speaking, there are two methods for drying water-containing materials (also known as wet materials or materials to be dried). The first is forced evaporation, that is, heating the temperature of the material to 100C under normal pressure, and the water changes from liquid to gas. This phase change process consumes a lot of energy, and its description parameter is latent heat of vaporization. Under one atmospheric pressure (0.1MPa), 100 The latent heat of vaporization of water at ℃ is 2257.2kJ / kg, compared with the specific heat capacity of water is 4.2kJ / kg, in other words, the energy consumed by the vaporization of water is 5 times the energy required to raise the same amount of water from 0C to 100C many. This is the main reason for the high energy consumption of forced evaporation. The typical representative of forced evaporation is to boil water until ...

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Problems solved by technology

[0006] The Chinese patent "Spiral Flow Hot Air Dryer" (application number 02149402) discloses a technical route of hot air drying + screw conveying, but this patent uses spiral blades to directly transport the materials to be dried, but has some operational shortcomings: first , the dried material is easy to harden on the surface of the spiral blade, and it is not easy to detach; second, the thick material to be dried cannot be turned, making it difficult to dry quickly inside

[0007] Another patent (PCT / CN2014 / 000060) applied by the applicant relates to a drying device for water-containing solid materials that uses ball bearings to assist drying. It has good drying effects and energy-saving effects, and is especially suitable for drying viscous water-containing solid materials. However, the size of its spiral dryer is large, which is suitable for use as an industrial drying device in the open air or in workshops, but it takes up some space when it is used as a non-flush toilet for indoor use.

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