Film scraping device for molecular distiller and film scraping thickness adjusting method

Abstract

The invention firstly discloses a film scraping device for a molecular distiller. The film scraping device comprises a transmission shaft, a cross-shaped bracket and a scraping plate component, the transmission shaft is a round-rod-shaped long shaft, the upper end of the transmission shaft is connected with the speed reducer, and the lower end of the transmission shaft is fixedly connected with the cross-shaped support in the vertical direction along the center point of the cross-shaped support; the end of the cross-shaped support is connected with a scraper support in the vertical direction through a connecting rod. The scraper bracket is a cuboid; roller through grooves are symmetrically and coaxially formed in the upper end and the lower end, and rollers rolling in the horizontal direction are arranged in the roller through grooves; a square scraper groove is formed in the middle of the scraper support, and a scraper is fixed in the scraper groove; the invention further discloses a wiped film thickness adjusting method, the height of the scraping plate extending out of the scraping plate groove is adjusted through the wiped film thickness adjusting device, and then the wiped film thickness is adjusted. The film scraping device disclosed by the invention can adapt to different cylinder wall thicknesses, the working radius is flexibly adjusted, and meanwhile, an adjusting method is provided, so that the film scraping device does not need to be replaced under different liquid film thickness requirements.

Description

technical field [0001] The invention relates to the technical field of mechanical manufacturing, and mainly relates to a scraping film device for a molecular distiller and a method for adjusting the thickness of the scraped film. Background technique [0002] Distillation is a method of liquid-liquid separation in chemical unit operations. It mainly uses the principle of different boiling points of each component to achieve the separation of components. However, many petrochemical products, chemicals, fatty acids, especially some natural products, are heat-sensitive substances. It is easy to be damaged during the heating process, so the separation of these substances should be carried out at their boiling point, and the molecular still should be born. [0003] Molecular distiller is a device for liquid-liquid separation under vacuum. It has the characteristics of low distillation temperature and short thermal contact time. It is very suitable for the separation of high-boili...

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Problems solved by technology

[0005] Purpose of the invention: In view of the problems existing in the above-mentioned background technology, the present invention provides a film scraping device for molecular stills and a method for adjusting the thickness of the film, which is used to solve the uneven and consistent film distribution and the inflexible film thickness of the existing film scraping device Regulatory issues

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