Novel horizontal drum film evaporation device

Abstract

The invention discloses a novel horizontal rotary drum film evaporation device, and relates to the technical field of wastewater treatment. The device comprises a machine base, a rotary drum, an upper cover body, an air supply assembly and a spiral material conveying machine, an arc-shaped groove is formed in the top of the machine base. Pipe bodies are arranged at the two ends of the rotary drum and fixed to the machine base through bearings and supports, and the bottom of the rotary drum is located in the arc-shaped groove and concentric with the arc-shaped groove. Mechanical seals are arranged at the two ends between the rotary drum and the arc-shaped groove, and the upper cover body is fixed to the machine base and is concentric with the rotary drum. According to the invention, the novel evaporation device is designed, and the space among the rotary drum, the upper cover body and the arc-shaped groove is utilized to thin the material liquid; compared with a vertical film evaporator, a good film state can be guaranteed, and the unit heat exchange area is effectively increased. In addition, only one scraper is used, so that the condition that materials are gathered on the back of the scraper is avoided, and the evaporation effect of the evaporation device is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, in particular to a novel horizontal drum thin film evaporation device. Background technique [0002] Thin-film evaporators are mostly used to treat high-concentration mother liquor (residue), which is a very critical terminal equipment for "zero discharge" of high-concentration wastewater. High-concentration wastewater basically comes from the mother liquor discharged from the bottom of the evaporation device or the distillation tower. The concentration of organic matter and inorganic salts is very high, the inorganic salts are in a saturated state, the COD is as high as about 50,000 or more, and the boiling point rise is also very high, which is difficult for conventional evaporation devices, such as multiple effect evaporation (MEE) and mechanical recompression evaporation (MVR). [0003] Most of the existing thin-film evaporators are vertical. A jacket is installed in the casing...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing thin-film evaporators are vertical. A jacket is installed in the casing and steam or hot water is input to heat the casing. A large number of scrapers are used to scrape off the dry material liquid and guide the liquid, so that the material liquid runs in a thin film. However, if it is used for a high-viscosity material liquid, the material will wrap around the main shaft and the material will be dead at the back of the scraper. Larger, serious problems of agglomeration, which reduces the actual heat transfer area

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