Purifying method capable of removing small suspended particles from tobacco extracting liquid

Abstract

The invention aims at the problem in purification of a tobacco extracting liquid, and provides a purifying method capable of removing small suspended particles from the tobacco extracting liquid. Thepurifying method comprises the following steps: (a), performing countercurrent extraction on a tobacco raw material in hot water and squeezing for several times, wherein the operation is performed 0.5to 1 hour each time; (b), feeding a mixture of the tobacco raw material in the step (a) and the hot water into a slurry squeezing machine, performing solid-liquid separation on the squeezed slurry, filtering and separating a primarily extracted liquid through a rotary vibration sieve; (c), heating the extracting liquid obtained by filtering and separating in the step (b), then, adding a flocculating agent, and performing ultrasonic treatment for 0.5 to 4 hours; (d), performing centrifugal treatment on the extracting liquid which is treated in the step (c) to obtain a supernatant, filtering the supernatant by adopting a membrane with the pore diameter of 15 to 100 nm, and completing purifying. According to the purifying method capable of removing the small suspended particles from the tobacco extracting liquid, the small suspended particles which cannot be removed in the prior art are enlarged and are flocculated into large particles which can be settled and filtered through heating and ultrasonic treatment intensification means, so that a better purifying effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of tobacco extract purification, and in particular relates to a purification method capable of removing small suspended particles in tobacco extract. Background technique [0002] The papermaking method of reconstituted tobacco leaves, commonly known as tobacco flakes, is to use tobacco waste such as tobacco stems, tobacco powder and chips as the main raw materials, impregnate the tobacco raw materials with water, and then separate the water-soluble and insoluble substances in the tobacco from solid-liquid. Equipment and technology, insoluble matter such as tobacco fiber is dispersed in water and then passed through a paper machine to form a fiber sheet. At the same time, the water-soluble matter is concentrated and coated back on the sheet. After drying, it is reconstituted tobacco leaves by papermaking. [0003] The extract contains a large amount of macromolecular substances such as pectin, starch, and pr...

AI Technical Summary

Problems solved by technology

Because flocculants generally produce flocculation through charge neutralization / adsorption, this process can only flocculate some macromolecular particles with more negative charges and remove them through a centrifuge. A large number of uncharged or weakly charged salt particles smaller than microns and colloids The macromolecular substances in the form cannot be effectively flocculated and are difficult to be separated and removed by the centrifuge; and there are still a large amount of uncrystallized supersaturated calcium and magnesium salts in the extract, and the supersaturation further increases during the concentration process and a large amount of re-crystallization Precipitation, the slag content of the concentrated solution increases significantly, resulting in "white core" and sticking of the product

Images