Alpha type high-strength gypsum powder drying machine

Abstract

The invention discloses an alpha type high-strength gypsum powder drying machine. The alpha type high-strength gypsum powder drying machine comprises a machine base, a drying cylinder body, a paddle driving mechanism, a paddle main shaft and a paddle blade; the drying cylinder body, the paddle driving mechanism, the paddle main shaft and the paddle blade are arranged on the machine frame; a material inlet pipe is arranged on one side of the upper end of the drying cylinder body, and a material outlet pipe is arranged on the other side of the lower end of the drying cylinder body; the paddle main shaft is arranged in the drying cylinder body; the paddle blade is arranged on the outer side of the paddle main shaft; the paddle driving mechanism drives the paddle main shaft to rotate; a communicating cavity is formed in the paddle main shaft and the paddle blade; a steam inlet and a condensed water outlet are formed at one end of the paddle main shaft; an annular cavity is formed in the cylinder wall of the drying cylinder boy; a plurality of steam inlets are formed at the upper end of the drying cylinder body; a plurality of condensed water outlets are formed at the lower end of the drying cylinder body. The alpha type high-strength gypsum powder drying machine has the advantages of heating uniformity, constant temperature, short retention time, high heat transfer efficiency, lowenergy consumption and high quality of produced products.

Description

technical field [0001] The invention relates to an α-type high-strength gypsum powder dryer. Background technique [0002] For the current production of high-strength gypsum by hydrothermal method, after the dihydrate gypsum undergoes solid-liquid separation by gypsum separator after crystal conversion, it becomes short rod-shaped crystals, that is, the surface of α-type high-strength gypsum powder contains about 15% free water. Due to α wet powder The storage conditions are very harsh, and the temperature must be above 97°C to be stable for 30 minutes without hydration or hardening. This requires us to quickly send the α wet powder into the dryer after solid-liquid separation, and remove the free water on the surface of the α wet powder. Drying and removal, at the same time, the temperature is stable and reliable, and the running speed is uniform and constant. There will be no over-burning or under-burning, avoiding Type III gypsum powder, ensuring product quality and meeti...

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Problems solved by technology

The drying equipment currently used includes steam tube rotary kiln, disc drying equipment, hot air flash evaporation and other equipment, but none of them can solve the problem of large area, large equipment volume, low output, difficulty in transportation, installation and maintenance, and energy consumption. Disadvantages such as high cost and unstable product performance, especially the problem that it cannot solve the problem of material blocking when the water content of α wet powder is slightly high, which will affect the normal operation of the equipment until the entire production line is shut down for maintenance and other difficulties

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