Membrane separation process of tobacco extracting solution

Abstract

The invention relates to a membrane separation process of a tobacco extracting solution. The membrane separation process comprises the following steps: A, performing preliminary solid-liquid separation on the tobacco extracting solution through a first liquid storage tank and primary separation equipment; B, pumping to-be-separated solution into a membrane separation device for membrane separation, collecting clear liquid after membrane separation through a liquid outlet in the outer end of the separation device, then entering a concentration system and reflowing membrane separation slag liquid into the first liquid storage tank; C, according to the increase of the membrane surface pressure and the proportion of the liquid in a membrane, automatically switching the system to be in a cleaning state, and entering a cleaning state after the liquid in the membrane is emptied; and D, opening an emptying pipeline arranged on the membrane separation device to timely and effectively eliminate various gases caused by the fermentation of the tobacco extracting solution. The membrane separation process provided by the invention is convenient to operate, can realize continuous feeding and continuous filter residue and filtrate discharging, and has the characteristics that the tangential flow velocity is high, the concentration polarization phenomenon of a membrane surface is reduced, and the membrane flux is stable.

Description

technical field [0001] The invention relates to a special separation technology, belongs to the field of membrane separation, and in particular relates to a tobacco extraction liquid membrane separation process. [0002] technical background [0003] In the production process of tobacco sheet by papermaking method, it is a necessary process to realize the solid-liquid separation of tobacco extract (tobacco powder extract, tobacco stem extract or mixed extract) and tobacco fiber. Usually, mechanical devices such as squeezer, filter screen, vacuum filtration, centrifugal sedimentation, etc. are used to separate the tiny solid suspended solids in the extract of stem end. Impurities such as starch, pectin, and sugars remain in the liquid, and solid-phase particles that are not effectively removed in the tobacco extract still occupy a large proportion. [0004] Since the smaller the diameter of the solid phase particles, the more difficult the mechanical sedimentation is, the mac...

AI Technical Summary

Problems solved by technology

[0009] The present invention aims at the disadvantages of the current papermaking process of reconstituted tobacco leaves, such as incomplete separation and impurity removal methods, and poor quality of tobacco mouthfeel, and provides a liquid membrane separation process for tobacco extraction, which is easy to operate and can operate continuously and stably. Miscellaneous effect is remarkable

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