Special mixing device for phosphoric acid employing hemihydrate process

Abstract

The invention provides a special mixing device for phosphoric acid employing a hemihydrate process. The special mixing device comprises a drive part, a rack and a mixing mechanism which are sequentially arranged, wherein the mixing mechanism comprises a mixing barrel and a mixing shaft with blades in axial direction; the drive part comprises a motor, a coupling and a reducer which are sequentially arranged along the same horizontal axis; the reducer is a gear reducer, a worm gear reducer and/or a belt wheel reducer; the top of the mixing shaft is connected with the reducer and a bottom end is separated from the bottom of the mixing barrel at a certain distance; the mixing shaft is a hollow shaft; and a first mixing blade, a second mixing blade and a defoaming blade are sequentially arranged along the axial direction from bottom to top. By adopting the design and the layout of the mixing blades of the special mixing device, the widths of the mixing blades are increased, the mixing area is increased during rotation, the characteristics of high concentration and high viscosity of phosphoric acid slurry employing the hemihydrate process can be overcome, the mixing output effect is improved and mixing is more even and thorough.

Description

technical field [0001] The invention relates to a stirring device, in particular to a special stirring device for semi-aqueous phosphoric acid. Background technique [0002] With the depletion of water resources, the dihydrate phosphoric acid production process that used to consume a lot of water is becoming less and less suitable for the current social development requirements. The semi-aqueous phosphoric acid production process is more and more favored by phosphoric acid production enterprises because of its low water consumption, and more and more manufacturers use it. However, because the semi-aqueous phosphoric acid production process uses less water, the slurry concentration is high and the viscosity is high. The stirring equipment of the previous process has problems such as poor stirring output, insufficient mixing, and unevenness during use. Contents of the invention [0003] In order to solve the above-mentioned deficiencies in the prior art, the present inventi...

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Problems solved by technology

However, because the semi-aqueous phosphoric acid production process uses less water, the slurry concentration is high and the viscosity is h

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