CN104667747A - Method for deeply removing impurities from tobacco leaching solution by silicon carbide film method - Google Patents
Method for deeply removing impurities from tobacco leaching solution by silicon carbide film method Download PDFInfo
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- CN104667747A CN104667747A CN201510053049.8A CN201510053049A CN104667747A CN 104667747 A CN104667747 A CN 104667747A CN 201510053049 A CN201510053049 A CN 201510053049A CN 104667747 A CN104667747 A CN 104667747A
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- silicon carbide
- carbide film
- leaching solution
- leaching liquor
- tobacco
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Abstract
The invention relates to a method for deeply removing impurities from a tobacco leaching solution by a silicon carbide film method. The method is characterized by comprising the following steps: collecting the tobacco leaching solution subjected to three-stage centrifugal separation into a feeding tank of a silicon carbide film separation system, then putting the tobacco leaching solution into a feeding pump through a basket type prefilter, and conveying the leaching solution into a circulating loop consisting of a circulating pump and a silicon carbide film by the feeding pump, wherein under the common action of the feeding pump and the circulating pump, the leaching solution obtains a certain film spanning pressure differential and a film surface flowing speed and is subjected to cross-flow filtering on the inner surface of a silicon carbide film pipe, and macromolecular substances such as a large quantity of proteins and pectin in the leaching solution are continuously concentrated in the circulating loop and are discontinuously discharged; penetrating fluid subjected to impurity removal in the leaching solution flows out from the outer wall of the silicon carbide film pipe. The method disclosed by the invention is easy and convenient to operate and simple in process; the impurity removal effect is obvious, so that the macromolecular substances such as a large quantity of proteins and pectin in the leaching solution can be effectively removed, and the sensory quality of a thin tobacco sheet is greatly improved.
Description
Technical field
The present invention relates to special separation technical field, particularly a kind of carborundum embrane method is to the method for tobacco extract deep impurity-removing.
Technical background
In producing tobacco flake in method similar to papermaking process, the extraction of tobacco leaching liquor has the shortcoming of " thick, large, black ", as tradition screening, centrifugation and the technique such as sheet frame is separated, thorough not to the separation of leaching liquor, impurity can not effectively be removed, and the impurities left such as a large amount of protein, starch, pectin, carbohydrate are in centrifugate, and the overwhelming majority is few to flue gas contribution useful component, assorted gas can be brought to cigarette, and albumen in tobacco, carbohydrate are also one of reasons producing tar; Again directly through concentrated, concentrate, also without any process, all turns back on shaping thin slice sheet base, cause reconstituted tobacoo to mix gas weight, stimulate the shortcomings such as nature and flavor are large, product coarse, reduce the mouthfeel characteristic of slice flue gas, thus reduce the function that thin slice reduces releasing content of coke tar in cigarette composition.
The material such as protein, starch, pectin contained in tobacco leaching liquor in addition, in follow-up three-effect evaporation and condensation process, easily adhesion, coking and fouling on the heat exchanger tube of heat exchanger, significantly increase heat transmission resistance, not only cause steam energy consumption large, concentration time is long, and in concentration process, low boiling aroma substance spill-out is larger, strengthen the loss of active principle in tobacco, affect the quality of reconstituted tobacco; Also cause concentrator not easy cleaning, the cleaning frequency is short, and production cycle length waits potential problems.
The inorganic ceramic membrane that silicon carbide film is a kind of high flux, acid and alkali-resistance, good mechanical property, filtering accuracy are high and the life-span is grown.Based on the strainability that silicon carbide film is excellent, silicon carbide film separator, by products of separated objectionable impurities in first Application to papermaking-method reconstituted tobaccos process, improves tobacco taste quality.By producing checking, silicon carbide film impurity-eliminating effect in tobacco leaching liquor production process is remarkable, and flux is large, and operating characteristics is stablized.
Summary of the invention
The present invention be directed in current papermaking-method reconstituted tobaccos production process, adopt traditional separation, impurity removal method not thorough, the defects such as tobacco taste quality difference, a kind of carborundum embrane method provided is to the new method of tobacco extract deep impurity-removing.First, the method is easy and simple to handle, and process is simple, and impurity-eliminating effect is remarkable, effectively can remove a large amount of protein in leaching liquor, the macromolecular substances such as pectin, the organoleptic quality of reconstituted tobacoo is greatly improved.Secondly, silicon carbide film flux is large, high temperature resistant, acid and alkali-resistance, and separating property is stablized.
Technical scheme of the present invention is: collect in the head tank of silicon carbide film piece-rate system by the tobacco leaching liquor through three grades of centrifugations, then feed pump is entered through " basket " prefilter, leaching liquor is sent in a closed circuit be made up of circulating pump and silicon carbide film by feed pump, under the acting in conjunction of feed pump and circulating pump, leaching liquor obtains certain transmembrane pressure and crossflow velocity, leaching liquor carries out " cross-current type " at silicon carbide film pipe internal surface and filters, protein a large amount of in leaching liquor, the macromolecular substances such as pectin constantly concentrate in closed circuit, and discontinuous discharge, penetrating fluid in leaching liquor after removal of impurities flows out from silicon carbide film pipe outer wall.
As preferably, described leaching liquor is offal or offal leaching liquor.
As preferably, the pore diameter range of described prefilter is 1 ~ 100 order stainless steel filtering net.
As preferably, described silicon carbide film material is filter course and supporting layer is all pure carborundum.
As preferably, described silicon carbide film pore diameter range is 0.01 ~ 5 μm.
As preferably, described transmembrane pressure scope is 0.1 ~ 0.5Mpa.
As preferably, described crossflow velocity scope is 1.0 ~ 5.0m/s.
Beneficial effect: remarkable advantage of the present invention is:
(1) macromolecular substances such as protein a large amount of in leaching liquor, pectin can effectively be removed
(2) organoleptic quality of the leaching liquor after filtering and impurity removing improves
(3) easy and simple to handle, process is simple
(4) flux is large, and separating property is stablized
Detailed description of the invention:
Further illustrate the present invention below in conjunction with embodiment, but be not any restriction of context of the present invention.
Embodiment 1
By offal leaching liquor, after three grades centrifugal, enter silicon carbide film piece-rate system.80 orders " basket " filter is adopted to carry out pre-filtering; Feed temperature 55 DEG C when entering silicon carbide film piece-rate system; Transmembrane pressure 2.0bar, 2.5bar, 3.0bar, 3.5bar and the 4.0bar respectively of silicon carbide film system; The crossflow velocity of silicon carbide film is 2.0m/s, 3.0m/s and 4.0m/s respectively; The flux of penetrating fluid is as following table:
Table 1: offal leaching liquor silicon carbide film separation, impurity removal data
Embodiment 2
To offal be soaked, after three grades centrifugal, enter silicon carbide film piece-rate system.50 orders " basket " filter is adopted to carry out pre-filtering; Feed temperature 50 DEG C when entering silicon carbide film piece-rate system; Transmembrane pressure 2.0bar, 2.5bar, 3.0bar, 3.5bar and the 4.0bar respectively of silicon carbide film system; The crossflow velocity of silicon carbide film is 2.0m/s, 3.0m/s and 4.0m/s respectively; The flux of penetrating fluid is as following table:
Table 2: offal leaching liquor silicon carbide film separation, impurity removal data
Claims (7)
1. a carborundum embrane method is to the method for tobacco extract deep impurity-removing, it is characterized in that, comprise the following steps: the tobacco leaching liquor through three grades of centrifugations is collected in the head tank of silicon carbide film piece-rate system, then feed pump is entered through " basket " prefilter, leaching liquor is sent in a closed circuit be made up of circulating pump and silicon carbide film by feed pump, under the acting in conjunction of feed pump and circulating pump, leaching liquor obtains certain transmembrane pressure and crossflow velocity, leaching liquor carries out " cross-current type " at silicon carbide film pipe internal surface and filters, protein a large amount of in leaching liquor, the macromolecular substances such as pectin constantly concentrate in closed circuit, and discontinuous discharge, penetrating fluid in leaching liquor after removal of impurities flows out from silicon carbide film pipe outer wall.
2. method according to claim 1, is characterized in that, described leaching liquor is offal or offal leaching liquor.
3. method according to claim 1, is characterized in that, the pore diameter range of described prefilter is 1 ~ 100 order stainless steel filtering net.
4. method according to claim 1, is characterized in that, described silicon carbide film material is filter course and supporting layer is all pure carborundum.
5. method according to claim 1, is characterized in that, described silicon carbide film pore diameter range is 0.01 ~ 5 μm.
6. method according to claim 1, is characterized in that, described transmembrane pressure scope is 0.1 ~ 0.5Mpa.
7. method according to claim 1, is characterized in that, described crossflow velocity scope is 1.0 ~ 5.0m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510053049.8A CN104667747A (en) | 2015-02-02 | 2015-02-02 | Method for deeply removing impurities from tobacco leaching solution by silicon carbide film method |
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| CN201510053049.8A CN104667747A (en) | 2015-02-02 | 2015-02-02 | Method for deeply removing impurities from tobacco leaching solution by silicon carbide film method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107137971A (en) * | 2017-06-22 | 2017-09-08 | 杭州利群环保纸业有限公司 | A kind of tobacco extract membrane separation process |
| CN107335277A (en) * | 2017-06-22 | 2017-11-10 | 杭州利群环保纸业有限公司 | A kind of tobacco extract membrane separation device and control method |
| CN110338449A (en) * | 2019-07-10 | 2019-10-18 | 上海烟草集团有限责任公司 | A kind of preparation method of concentrate in low viscosity papermaking-method reconstituted tobaccos production process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107137971A (en) * | 2017-06-22 | 2017-09-08 | 杭州利群环保纸业有限公司 | A kind of tobacco extract membrane separation process |
| CN107335277A (en) * | 2017-06-22 | 2017-11-10 | 杭州利群环保纸业有限公司 | A kind of tobacco extract membrane separation device and control method |
| CN107335277B (en) * | 2017-06-22 | 2023-05-02 | 杭州利群环保纸业有限公司 | Tobacco extract film separation device and control method |
| CN110338449A (en) * | 2019-07-10 | 2019-10-18 | 上海烟草集团有限责任公司 | A kind of preparation method of concentrate in low viscosity papermaking-method reconstituted tobaccos production process |
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Application publication date: 20150603 |