Reverse-flow type solid-state distillation tower with spiral slideway

Abstract

The invention discloses a reverse-flow type solid-state distillation tower with a spiral slideway, and belongs to the field of biological energy technology process equipment. A steam chamber is arranged at the bottom of the tower body, the steam chamber and the tower body are isolated by adopting a steam distributor, the spiral slideway is fixedly arranged in the tower body and is positioned abovethe steam chamber, a central guide pipe is arranged at the central position in the tower body, and the central guide pipe is directly inserted into the tower bottom and is isolated from the steam chamber; an air outlet of the central guide pipe is connected with a vacuum pumping device, an air outlet is formed in the upper part of the central guide pipe, and stripped steam enters the central guide pipe from the air outlet and is discharged out of the tower; and the spiral slideway is arranged on the inner wall of the tower body. The spiral slideway structure design adopted by the invention can realize continuous flow of solid granular materials and full contact with steam, so that continuous production of a solid distillation process is realized, and the production efficiency is improved;and the retention time of the materials in the tower is controllable, so that the advantage of simple batch distillation operation is considered, and the requirement of continuous production is met.

Description

Technical field [0001] The invention belongs to the technical field of biological energy technology process equipment, and is specifically a countercurrent solid distillation tower with a spiral slide. Background technique [0002] Solid-state distillation is a mass transfer unit operation in which steam is used to heat the liquid-solid system, each component is separated due to the difference in volatility, and the components that are easily soluble in steam are extracted through steam flow. It is generally used to extract the effective ingredient ethanol from the fermentation material from the solid-state fermentation. The most common application is the follow-up process of traditional liquor distillation and solid-state fermentation to produce fuel ethanol. It can also be used in food processing, biopharmaceutical and other industries. [0003] China is one of the earliest wine-making countries in the world. The combination of retort distillation and traditional solid-state fer...

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Problems solved by technology

[0006] Invention patent CN102094045A uses rotating grille to realize the flow of materials in the tower, and at the same time, steam is introduced from the bottom to ensure countercurrent contact. However, due to the installation of a rotating shaft and a transmission device, it is necessary to use a motor to drive the disc to rotate, which involves the sealing problem at the shaft seal At the same time, there are reasons such as limited space in the grille and large differences in material particles, and the problem that the interior is easy to block and cause shutdown.

[0007] Invention patent CN108371826A proposed a distillation tower with a slide structure for gas-liquid separation operation. The slide structure is used to reduce the thickness of the evaporated liquid film. However, due to the good fluidity of the liquid itself, the residence time of the liquid on the slide is short and difficult to control. Compared with the ordinary plate tower, the heat and mass transfer effect is not significantly improved

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