A multi-purpose laboratory small-scale rectification system

Abstract

The invention discloses a multipurpose small rectification system for a laboratory. The multipurpose small rectification system comprises a feeding device and a rectification tower connected to the feeding device in series. The top of the rectification tower is orderly connected to a condenser and a return tank. A liquid outlet end of the return tank is connected to two pipes, one of the two pipes is provided with a return pump, has a liquid outlet end connected to the top of the rectification tower and is a return pipe, and the other one of the two pipes is connected to a top material tank and is a product pipe. A material outlet at the tower bottom is orderly connected to a bottom material pump and a bottom material tank by pipes. The rectification tower comprises a tower bottom, a tower body and the top of the tower. The tower bottom is connected to the bottom end of the tower body. The top of the tower is connected to the top end of the tower body. The tower body comprises multiple tower sections, each two adjacent tower sections are detachably connected by a connection section, and each one of the tower sections is filled with a filling material. The multipurpose small rectification system can realize industrial production-simulative continuous rectification in a limited space of a laboratory, can carry out a normal-pressure vacuum rectification test, a common continuous rectification test and an extraction rectification test and satisfies requirements on a plurality of tests in the laboratory.

Description

technical field [0001] The invention relates to a rectification system, in particular to a small-scale rectification system for a multipurpose laboratory. Background technique [0002] The rectification tower mainly includes two types. One is the rectification device used in chemical production. This type of device is usually a continuous production device. The system mainly includes a feed pump, a rectification tower, an overhead condenser, a reflux tank, Reflux pumps, tower top product pumps, reboilers, still material pumps, etc., production equipment generally requires a large production capacity, and its rectification towers usually use tower towers, structured packing towers, large-size bulk packing towers, etc. The tray efficiency of these rectification towers is low, and the height of the rectification tower is very high, which takes up a lot of space. Due to the large production capacity, the delivery pumps usually use centrifugal pumps, and the flow control is contr...

AI Technical Summary

Problems solved by technology

It is composed of rectification kettle, rectification tower, tower top condenser, reflux ratio distributor and top material receiving bottle. During the rectification test, the processed materials are put into the rectification kettle at one time, and the rectification kettle is heated , the material in the kettle is partially vaporized, the steam enters the rectification tower, flows out from the top tower, enters the condensation pipe, and condenses into a liquid. After the condensate is distributed by the reflux ratio distributor, part of the liquid returns to the rectification tower from the top of the rectification tower to provide reflux Liquid, a part of the condensate enters the top material receiving bottle, as a rectification product, because the composition of the still material is constantly changing during the batch rectification process, there is a big difference from the continuous rectification operation of the production device, so the batch rectification device cannot Fully simulates the operation of the production unit

[0003] In laboratory rectification test equipment, in order to obtain more theoretical plate numbers at a lower tower body height, small-sized high-efficiency bulk packing is usually used. The plate efficiency of this type of packing is very high, but when the tower diameter When it is too large or the height of the packing layer is too high, the efficiency of the tray will drop sharply due to the uneven distribution of liquid on the surface of the packing

The existing laboratory rectification tower generally only has one section of packing layer, and its effective packing height is limited, so it is difficult to meet the experimental requirements of multi-theoretical tray distillation

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