A countercurrent solid-state distillation column with a spiral slide

Abstract

The invention discloses a countercurrent solid-state distillation tower with a spiral slide, which belongs to the field of biological energy technology and process equipment. A steam chamber is arranged at the bottom of the tower body, and a steam distributor is used to isolate the steam chamber from the tower body, and the spiral slide is fixed. Installed on the inside of the tower body and above the steam chamber, there is a central conduit in the center of the tower body, which is inserted directly into the bottom of the tower and isolated from the steam chamber; the gas outlet of the central conduit is connected to the vacuum pumping device, and the central conduit There is an air outlet on the upper part of the tower, and the stripped steam enters the central conduit from the air outlet and is discharged out of the tower; a spiral slide is installed on the inner wall of the tower body. The structural design of the spiral slide used in the present invention can realize the continuous flow of solid granular materials and full contact with steam, so that the solid-state distillation process can realize continuous production and improve production efficiency; and the residence time of materials in the tower can be controlled, both It not only takes into account the advantages of simple operation of batch distillation, but also ensures the need of continuous production.

Description

technical field [0001] The invention belongs to the technical field of biological energy technology process equipment, in particular to a countercurrent solid-state distillation tower with a spiral slide. Background technique [0002] Solid-state distillation is a mass transfer unit operation that uses steam to heat a liquid-solid system, separates components due to differences in volatility, and extracts components that are easily soluble in steam through steam flow. It is generally used to extract the active ingredient ethanol in the fermented product from the raw material after solid-state fermentation. The most commonly used occasions are the retort distillation of traditional liquor in my country and the follow-up process of solid-state fermentation to produce fuel ethanol. It can also be used in food processing, biopharmaceuticals and other industries. [0003] China is one of the earliest wine-making countries in the world. The combination of retort distillation and ...

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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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