| 摘要 |
Disclosed are a process and an apparatus for improving tobacco raw material. The process mainly comprises performing an extraction from at least one of tobacco leafs, tobacco flakes, tobacco powder, stalks and cut stems by mixed solvents, conducting a solid-liquid separation for the tobacco raw material, applying the extract liquor of tobacco leaves, flakes and cuts for manufacturing tobacco extract and that of stalks and cut stems for manufacturing fertilizer, diluting and mixing a given amount of tobacco aqueous extract and ethanol extract and removing harmful components so as to get feed liquid, backfilling the feed liquid to the tobacco raw material, and drying the tobacco raw material to a certain dryness to obtain the products. The apparatus is a system composed of a plurality of interconnected independent devices such as extractor, solid-liquid separator, a feed liquid backfiller, etc. |
| 主权项 |
1. A process for improving tobacco raw material by conducting extraction from tobacco raw material used in the cigarette industry with solvent, removing harmful components and backfilling with feed liquid to obtain the improved tobacco raw material, wherein the process comprises the following steps:
1) mixing more than one tobacco raw materials selected from tobacco leaves, flakes, cuts tobacco, stalks, and cut stems with a mixed solvent containing 65˜97% of purified water and 3˜35% of other solvents at a mass ratio of 1:4˜1:30 between tobacco raw material and the mixed solvent, conducting extraction at a temperature of 10˜80° C. for a period of 1˜120 min to obtain a mixture of an extracted tobacco raw material and an extracted liquor, said extracted tobacco raw material containing tobacco leaves, flakes, or containing cuts, or containing stalks, or containing cut stems; 2) obtaining the extracted liquor by conducting solid-liquid separation of the mixture by means of squeezing or centrifugation until the dryness of the tobacco raw material therein reaches 20˜60%; 3) wherein the extracted liquor that results from the tobacco raw material only containing tobacco leaves, flakes or cuts is to form an aqueous extract of natural tobacco to be used in step 4), and an extracted liquor that results from the tobacco raw material containing stalks or cut stems is not used for steps 4) and 6) hereafter; 4) preparing a backfilling feed liquid by the following steps:
a) when the tobacco raw material comprises tobacco leaves, flakes, or cuts, the backfilling feed liquid is prepared by diluting by purified water 1˜10 parts by mass of the aqueous extract of natural tobacco prepared in steps 1) to 3) and 0.1˜15 parts by mass of an alcohol extract of natural tobacco and mixing the dilution uniformly, orb) when the tobacco raw material includes tobacco stalks or cut stems, the backfilling feed liquid is prepared by diluting by purified water 1˜10 parts by mass of an aqueous extract of natural tobacco prepared by a process other than as set out in steps 1) to 3) above and 0.1˜15 parts by mass of an alcohol extract of natural tobacco; and mixing the dilution uniformly; andc) removing harmful components from the backfilling feed liquid prepared by steps a) or b), andd) forming the backfilling feed liquid prepared by steps a) or b) with a concentration controlled in a range of 20˜50%; 5) adjusting the dryness of the tobacco raw material produced through the solid-liquid separation of step 2) to 40˜60% and then backfilling uniformly the backfilling feed liquid prepared by steps a) or b) to the tobacco raw material by spraying or immersion, with a mass ratio of the backfilling feed liquid prepared by steps a) or b) to the tobacco raw material being 10˜120%; and 6) drying the tobacco raw material backfilled with the backfilling feed liquid prepared by steps a) or b) until the moisture thereof reaches 11˜13% to obtain the end product. |
