CN109499369A - A kind of tobacco extract concentration technology - Google Patents
A kind of tobacco extract concentration technology Download PDFInfo
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- CN109499369A CN109499369A CN201811476023.4A CN201811476023A CN109499369A CN 109499369 A CN109499369 A CN 109499369A CN 201811476023 A CN201811476023 A CN 201811476023A CN 109499369 A CN109499369 A CN 109499369A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/147—Microfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/002—Forward osmosis or direct osmosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/002—Forward osmosis or direct osmosis
- B01D61/005—Osmotic agents; Draw solutions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
- B01D61/422—Electrodialysis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/58—Multistep processes
Abstract
The present invention relates to a kind of tobacco extract concentration technologies, belong to tobacco extract concentration technique field.The technique is that micro-filtration, micro-filtration permeate carry out positive osmosis concentration after primary purifying by tobacco aqueous extract, and the diluted liquid that draws that positive osmosis concentration is formed is recycled using electrodialysis or the mode of evaporating brine.Present invention process operating pressure is low, highly-safe；Thickening temperature is low, and when concentration heats up small, does not need heat exchange cooling；Fouling membrane is light, and cleaning is easy, and cleaning frequency is low.Present invention process concentrating degree is high simultaneously, and tobacco extract concentration is up to 60% after concentration；On papermaking-method reconstituted tobaccos tobacco extract enrichment process, evaporation and concentration can be replaced completely；And material, nicotine and volatile component loss are small in concentration process, and low energy consumption, application easy to spread.
Description
Technical field
The invention belongs to tobacco extract concentration technique fields, and in particular to a kind of tobacco extract concentration technology.
Background technique
In papermaking-method reconstituted tobaccos production, the extraction of tobacco material include stalk leaf it is mixed mention and obstruct leaf and divide propose two ways, adopt
With intermittent or continous way extraction process, no matter which kind of extracting method, the concentration of tobacco extract is typically in the range of between 6-12%.
The concentration of tobacco extract is a procedure of papermaking-method reconstituted tobaccos production, it is therefore an objective to improve extract concentrations
The mass percent concentration being coated with to suitable reconstituted tobacco chip base is 40-50% high concentration state.
In papermaking-method reconstituted tobaccos production, the concentration of tobacco extract uses evaporation and concentration mode.This condensing mode is deposited
In two big defects, one is the tobacco volatile ingredient including nicotine largely loses, loss amount is about 30-50%；The second is
Concentration process is related to the phase transformation of water, and energy consumption is high.
Patent CN101606748B, CN102823935A and CN103919272A disclose based on reverse osmosis concept, according to
By the tobacco extract film method for concentration of extraneous pressure-actuated different pore size film combination (ultrafiltration, nanofiltration, reverse osmosis), these sides
Method partly or entirely substitutes the evaporating concentration process of tobacco extract in reconstituted tobacco production, can reduce to some extent including cigarette
The loss of tobacco volatile ingredient including alkali, energy consumption aspect also have different degrees of reduction.But nanofiltration, inverse osmosis there is
Need the problems such as being cooled down using high drive and using heat exchange equipment, and in use process meeting so that reverse osmotic membrane by
Serious pollution, it is difficult to clean.Meanwhile in the manufacture craft of tobacco the water extracted immersing paste, and using evaporation, nanofiltration and reverse osmosis
Condensing mode be there is a problem that above-mentioned identical.Therefore how overcome the deficiencies in the prior art is tobacco extract concentration technique
The problem of field urgent need to resolve.
Summary of the invention
It is an object of the present invention to solve the deficiency of the existing technology and provide a kind of tobacco extract concentration technology, the works
Skill is the micro-filtrate membrane filtration by tobacco extract after primary purifying, and permeate carries out positive osmosis concentration, what positive osmosis concentration was formed
The diluted liquid that draws is recycled using electrodialysis or the mode of evaporating brine.The technique makes material, nicotine and volatile component
Lose small, and low energy consumption, application easy to spread.
To achieve the above object, The technical solution adopted by the invention is as follows:
The present invention is unless otherwise stated, percentage sign representation quality percentage.
A kind of tobacco extract concentration technology, includes the following steps:
Step (1) primary purifying: by tobacco extract impurity elimination, obtains suspension content and extracts in the tobacco primary purifying of 1-3%
Liquid；
Step (2), micro-filtration filtering: the film that the tobacco primary purifying extracting solution that step (1) obtains is used into aperture as 50-400nm
Micro-filtration is carried out at 0-100 DEG C, when operating pressure rises to 0.3MPa, is stopped filtering, is obtained trapped fluid and permeate；
Step (3), positive osmosis concentration: the permeate that step (2) is obtained carries out positive osmosis concentration, obtains tobacco extract concentration
Liquid and diluted draw liquid；
What concentration process used draws agent as inorganic acid salt and/or acylate；The inorganic acid salt cation is Na+、K+、
Mg2+、Ca2+Or NH4 +, anion Cl-、SO4 2-, HSO4 -、PO4 3-、HPO4 2-、H2PO4 −、CO3 2-、HCO3 -；Acylate is apple
Acid, sorbic acid, benzoic acid, lactic acid and citric acid potassium, sodium, ammonium salt；Thickening temperature is 5-45 DEG C, pressure 0.1-0.3MPa；
Concentration is using single-stage concentration or the multistage condensing mode of step by step concentration；
Step (4) draws liquid post-processing: by step (3) formed diluted to draw liquid dense using electrodialysis or by the way of evaporating brine
After contracting, the positive osmosis concentration process of reuse to step (3).
It is further preferred that the mode of step (1) impurity elimination is the group of one or more of sedimentation, centrifugation and filtering
It closes.
It is further preferred that the sedimentation includes natural subsidence and chemical settling；The centrifugation include butterfly from
The heart and the centrifugation of sleeping spiral shell；Described is filtered into plate compression, strainer filtering and filter-cloth filtering.
It is further preferred that film employed in step (2) is inoranic membrane or organic film.
It is further preferred that film employed in step (2) is ceramic membrane, polyvinylidene fluoride film or polytetrafluoroethyl-ne
Alkene film.
It is further preferred that membrane aperture employed in step (2) is 200nm, thickening temperature is 10-40 DEG C.
It is further preferred that isometric water is added to the trapped fluid that step (2) obtains, micro-filtration filtering is carried out again
Step, obtained trapped fluid repeat the isometric water of addition and micro-filtration filtration step 1-2 times, merge permeate and are just seeped
Concentration thoroughly.
It is further preferred that drawing agent is NaCl, CaCl2、NH4HCO3(NH4)2HPO4The group of middle one or more
It closes；Thickening temperature is 15-35 DEG C；Film used by positive osmosis concentration is doughnut forward osmosis membrane.
It is further preferred that concentration uses the three-level condensing mode of step by step concentration, level-one, second level, three in step (3)
Grade thickening amount is respectively 55-60%, 25-30%, 10-15% of total dehydrating amount, amounts to 100%；Used by positive osmosis concentration
Film is the doughnut forward osmosis membrane that aquaporin, acetate fiber, triacetate fiber or polyamide are separating layer.
It is further preferred that electric osmose eutectoid temperature is 20-35 DEG C, pressure 0.1-0.3MPa, using equal in step (4)
Phase film.
The present invention is not particularly limited the acquisition modes of tobacco extract, can be tobacco according to traditional extraction technique
Obtained product.
Primary purifying step of the present invention and micro-filtration filtration step abbreviation MF process together, are passed through after being extracted due to tobacco material
Separation of solid and liquid obtains extracting solution, and there is the impurity such as silt, small tobacco material fragment, so firstly the need of primary purifying is carried out,
But the tobacco extract through primary purifying is not clarified still, is in suspension milkiness liquid status, the present invention limits suspension content and exists
Within the scope of 1-3%.
For micro-filtration filtration step, the preferred contamination resistance of the present invention is strong, easy cleaning, to tobacco effective component adsorption capacity
Weak ceramic membrane, polyvinylidene fluoride film and polytetrafluoroethylene film.Membrane aperture range is between 50-400nm, preferably 200nm, with true
Guarantor is had suitable flux when micro-filtration, lactic acid bacteria is trapped, and filtered penetrating fluid clarifies the solution state that comes true.Meanwhile this hair
It is bright that effective component in trapped fluid is recycled by continuing filter type after being diluted with water.
The positive osmosis concentration step abbreviation FO process of the present invention, preferably aquaporin, acetate fiber, triacetate fiber or poly-
Amide is the doughnut forward osmosis membrane of separating layer, more preferably aquaporin doughnut forward osmosis membrane.It is preferred that concentration is adopted
With the three-level condensing mode of step by step concentration, level-one, second level, three-level thickening amount are respectively 55-60%, 25- of total dehydrating amount
30%, 10-15% amounts to 100%, and the liquid that draws that three-level is concentrated after the concentration to be formed reduction draws liquid, second level as secondary concentration
Concentration is further diluted to draw liquid and draws liquid as primary concentration.Liquid is drawn not need (such as to use when recycling
NaCl draws agent, can be discharged into sea, in salt lake), preferably use multistage condensing mode, it then follows draw the minimum principle of agent dosage.It is dense
The temperature for being suitable for when contracting is 5-45 DEG C, preferably 15-35 DEG C；Operation operating pressure is 0.1-0.3MPa.
When the positive osmosis concentration of the present invention, the dosage for drawing agent is not particularly limited, as long as tobacco extract obtained
Concentrate concentration is no more than 60%.
It is of the present invention to draw liquid post-processing electrodialysis step abbreviation ED process.Electrodialysis-ion exchange film all can be used for
Positive osmosis concentration draws the regeneration of liquid, it then follows the minimum principle of energy consumption carries out the selection of film, preferably homogeneous membrane, it is secondary select it is half homogeneous
Film, it is careful to select heterogeneous membrane.The suitable temperature of electrodialysis is 5-45 DEG C, preferably 20-35 DEG C；Operation operating pressure is 0.1-0.3MPa.
Evaporate brine: the diluted of concentration process generation draws liquid, using solar energy, wind energy as power, is concentrated to not less than last
Liquid concentration is drawn required for primary concentration.
The method of the present invention technique can the existing papermaking-method reconstituted tobaccos of replacing whole produce the preparation work of upper tobacco extract concentrate
Skill (is such as concentrated by evaporation), and being concentrated to tobacco extract concentrate of the concentration not less than 40% can be coated, and can reach
60% concentration.Equally, present invention process can also partly or entirely substitute the preparation process of existing tobacco the water extracted immersing paste, work as water
It when the concentration of extracted extract requires to be no more than 60%, can substitute, when the concentration of the water extracted immersing paste is required more than 60%, first can just seep completely
After being concentrated to 40% ~ 60% concentration thoroughly, then it is evaporated concentration, can avoid a large amount of heat-sensitive materials denaturation in this way, reduce material
Deng loss, reduce energy consumption.
Compared with prior art, the present invention has the advantages that:
(1) operating pressure is low (0.1-0.3MPa), highly-safe；
(2) thickening temperature is low (5-45 DEG C), and when concentration heats up small, does not need to exchange heat；
(3) fouling membrane is light, and cleaning is easy, and cleaning frequency is low；
(4) concentrating degree is high, and medicinal extract tobacco extract concentration is up to 60% after concentration；
(5) positive osmosis concentration process materials, nicotine and volatile component lose small (all < 1%)；
(6) low energy consumption for positive osmosis concentration process concentration, and concentration 1 ton of water of removal, power consumption is less than 30 degree.
It is mentioned by the positive osmosis concentration method of separation system permeable pressure head driving applied to tobacco based on forward osmosis principle
Taking liquid concentration, there is not been reported.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail.
It will be understood to those of skill in the art that the following example is merely to illustrate the present invention, and it should not be regarded as limiting this hair
Bright range.In the examples where no specific technique or condition is specified, described technology or conditions according to the literature in the art
Or it is carried out according to product description.Production firm person is not specified in material therefor or equipment, is that can be obtained by purchase
Conventional products.
Embodiment 1
A kind of tobacco extract concentration technology, includes the following steps:
Step (1) primary purifying: by tobacco extract impurity elimination, obtains suspension content and mentions in the tobacco primary purifying of 1-1.5%
Take liquid；
Step (2), micro-filtration filtering: by the tobacco primary purifying extracting solution that step (1) obtains use aperture for the film of 400nm in
Carry out micro-filtration at 90-100 DEG C, when micro-filtration, operating pressure rises to 0.3MPa, stops filtering, obtains trapped fluid and permeate；
Step (3), positive osmosis concentration: the permeate that step (2) is obtained carries out positive osmosis concentration, obtains tobacco extract concentration
Liquid and diluted draw liquid；
What concentration process used draws agent as NaCl；Thickening temperature is 5-20 DEG C, pressure 0.1-0.3MPa；Concentration uses single-stage
The mode of concentration；Film used by positive osmosis concentration is polyamide forward osmosis membrane；
Step (4) draws liquid post-processing: by step (3) formed it is diluted draw after liquid is concentrated using electrodialytic mode, return
With the positive osmosis concentration process to step (3).
Embodiment 2
A kind of tobacco extract concentration technology, includes the following steps:
Step (1) primary purifying: through being separated by solid-liquid separation obtained extracting solution impurity elimination after extracting to tobacco material, obtains suspended matter and contains
Measure the tobacco primary purifying extracting solution in 1.8-3%；The mode of impurity elimination is natural subsidence；
Step (2), micro-filtration filtering: the ceramic membrane that the tobacco primary purifying extracting solution that step (1) obtains is used into aperture as 50nm
Carry out micro-filtration at 10-20 DEG C, when micro-filtration, operating pressure rises to 0.3MPa, stops filtering, obtains trapped fluid and permeate；
Step (3), positive osmosis concentration: the permeate that step (2) is obtained carries out positive osmosis concentration, obtains tobacco extract concentration
Liquid and diluted draw liquid；
What concentration process used draws agent as potassium citrate；Thickening temperature is 25-45 DEG C, pressure 0.1-0.3MPa；Concentration is adopted
The mode being concentrated with single-stage；Permeate the film used just for aquaporin doughnut forward osmosis membrane
Step (4) draws liquid post-processing: diluted drawing reuse after liquid is concentrated by the way of evaporating brine for what step (3) were formed
To the positive osmosis concentration process of step (3).
Embodiment 3
A kind of tobacco extract concentration technology, includes the following steps:
Step (1) primary purifying: through being separated by solid-liquid separation obtained extracting solution impurity elimination after extracting to tobacco material, obtains suspended matter and contains
Measure the tobacco primary purifying extracting solution in 1.8-2.5%；The mode of impurity elimination is sleeping spiral shell centrifugation；
Micro-filtration filtering: the tobacco primary purifying extracting solution that step (1) obtains is used aperture for the segregation two of 200nm by step (2)
Fluoride film carries out micro-filtration at 0-40 DEG C, and when micro-filtration, operating pressure rises to 0.3MPa, stops filtering, obtain trapped fluid and
Permeate；
Step (3), positive osmosis concentration: the permeate that step (2) is obtained carries out positive osmosis concentration, obtains tobacco extract concentration
Liquid and diluted draw liquid；Film used by positive osmosis concentration is acetate fiber doughnut forward osmosis membrane；
Agent that concentration process used draw for potassium malate, potassium sorbate, Potassium Benzoate and potassium lactate (mass ratio 1:1:1:
1)；Thickening temperature is 15-35 DEG C, pressure 0.1-0.3MPa；Concentration uses the three-level condensing mode of step by step concentration；Level-one, two
Grade, three-level thickening amount are respectively 55%, 30%, the 15% of total dehydrating amount, amount to 100%；
Step (4) draws liquid post-processing: by step (3) formed it is diluted draw after liquid is concentrated using electrodialytic mode, return
With the positive osmosis concentration process to step (3)；Electric osmose eutectoid temperature is 20-35 DEG C, pressure 0.1-0.3MPa, using homogeneous membrane.
Isometric water is added in the trapped fluid obtained to step (2), carries out micro-filtration filtration step, obtained retention again
Liquid repeats the isometric water of addition and micro-filtration filtration step 1 time, merges permeate and carries out positive osmosis concentration.
Embodiment 4
A kind of tobacco extract concentration technology, includes the following steps:
Step (1) primary purifying: through being separated by solid-liquid separation obtained extracting solution impurity elimination after extracting to tobacco material, obtains suspended matter and contains
Measure the tobacco primary purifying extracting solution in 1-3%；The mode of impurity elimination is plate compression；
Step (2), micro-filtration filtering: the polytetrafluoro that the tobacco primary purifying extracting solution that step (1) obtains is used into aperture as 100nm
Vinyl film carries out micro-filtration at 20-30 DEG C, and when micro-filtration, operating pressure rises to 0.3MPa, stops filtering, obtains trapped fluid and thoroughly
Cross liquid；
Step (3), positive osmosis concentration: the permeate that step (2) is obtained carries out positive osmosis concentration, obtains tobacco extract concentration
Liquid and diluted draw liquid；Film used by positive osmosis concentration is triacetate fiber doughnut forward osmosis membrane；
What concentration process used draws agent as NaCl, KCl, NH4HCO3(NH4)2HPO4Mixture (mass ratio 1:1:1:
1)；Thickening temperature is 20-30 DEG C, pressure 0.1-0.3MPa；Concentration is using single-stage concentration or the multistage concentration side of three-level concentrate
Formula；Level-one, second level, three-level thickening amount are respectively 58%, 28%, the 14% of total dehydrating amount, amount to 100%.
Step (4) draws liquid post-processing: after the electrodialytic mode of diluted use that step (3) are formed is concentrated, reuse
To the positive osmosis concentration process of step (3)；Electric osmose eutectoid temperature is 5-45 DEG C, pressure 0.1-0.3MPa, using half homogeneous membrane.
Isometric water is added in the trapped fluid obtained to step (2), carries out micro-filtration filtration step, obtained retention again
Liquid repeats the isometric water of addition and micro-filtration filtration step 2 times, merges permeate and carries out positive osmosis concentration.
Embodiment 5
A kind of tobacco extract concentration technology, includes the following steps:
Step (1) primary purifying: obtains extracting solution impurity elimination through being separated by solid-liquid separation after extracting to tobacco material, obtains suspension content
In the primary purifying tobacco extract of 2-2.4%；The mode of impurity elimination is sedimentation and centrifugation；Described is settled into chemical settling, centrifugation
For butterfly centrifugal；
Step (2), micro-filtration filtering: the polytetrafluoro that the tobacco primary purifying extracting solution that step (1) obtains is used into aperture as 200nm
Vinyl film carries out micro-filtration at 10-40 DEG C, and when micro-filtration, operating pressure rises to 0.3MPa, stops filtering, obtains trapped fluid and thoroughly
Cross liquid；
Step (3), positive osmosis concentration: the permeate that step (2) is obtained carries out positive osmosis concentration, obtains tobacco extract concentration
Liquid and diluted draw liquid；
What concentration process used draws agent as NaH2PO4With sodium citrate (mass ratio 1:1)；Thickening temperature is 18-22 DEG C, pressure
Power is 0.1-0.3MPa；Concentration uses the three-level condensing mode of step by step concentration；Level-one, second level, three-level thickening amount are respectively
60%, 30%, the 10% of total dehydrating amount, amounts to 100%.
Step (4) draws liquid post-processing: the diluted liquid that draws that step (3) are formed uses electrodialytic mode to be concentrated
Afterwards, reuse to step (3) positive osmosis concentration process.Electric osmose eutectoid temperature is 25-30 DEG C, pressure 0.1-0.3MPa, using equal
Phase film.
Isometric water is added in the trapped fluid obtained to step (2), carries out micro-filtration filtration step, obtained retention again
Liquid repeats the isometric water of addition and micro-filtration filtration step 1 time, merges permeate and carries out positive osmosis concentration.
Application example 1: the positive osmosis concentration of tobacco leaf extracting solution, condensing mode MF+FO+ED
MF process: the 100L leaf extract that the mass percent concentration obtained in a manner of natural subsidence primary purifying is 8.2% is cooling
To after 26 DEG C, gather inclined tetrafluoroethene micro-filtrate membrane filtration through 100nm, when operating pressure rises to 0.3MPa, the bodies such as addition in trapped fluid
Long-pending tap water (5.6L) continues filtering to operating pressure and rises to 0.3MPa, then isometric tap water is added into trapped fluid
(5.2L) continues to filter after filtering rises to 0.3MPa to operating pressure and terminate, and the mass percent concentration for obtaining 105L is 7.1%
Permeate.
FO process:
Primary concentration: the permeate (27 DEG C) that 10L concentration is 7.1% is placed in forward osmosis enriched chamber, the hollow fibre of aquaporin
Tieing up forward osmosis membrane is concentration film, draws liquid chamber and the NaCl solution (25 DEG C) that 7.1L mass percent concentration is 8.5% is added, starting
Circulating pump is concentrated, (the observation liquid level variation or from drawing liquid, concentrate conductivity when drawing liquid water absorbing capacity and losing substantially
Variation determines) terminate concentration, obtain the primary concentration liquid that mass percent concentration is 14.5%.In primary concentration operational process, pressure
Power concentrate and draws liquid temperature because heat exchange is moved closer between 0.1-0.15 MPa, is lower than 27 DEG C.
Secondary concentration: after primary concentration, the liquid (DS) that draws after dilution is replaced as 5L mass per liter percent concentration
For 12% NaCl solution (25 DEG C), secondary concentration is carried out by primary concentration mode, obtaining mass percent concentration is 28.6%
Secondary concentration liquid.In secondary concentration operational process, pressure is between 0.1-0.2 MPa, concentrate and to draw liquid temperature almost the same,
Lower than 26 DEG C.
Three-level concentration: after secondary concentration, the liquid (DS) that draws after dilution is replaced as 4L mass percent concentration and is
15% NaCl solution (25 DEG C), carries out three-level concentration by primary concentration mode, obtains three that mass percent concentration is 48.5%
Grade concentrate.Three-level is concentrated in operational process, and pressure is between 0.1-0.3MPa, and concentrate and to draw liquid temperature almost the same is low
In 26 DEG C.
ED process:
Mass percent concentration is 4.8% to draw liquid 12.5L by 2.5- after the dilution that above-mentioned FO process level-one forward osmosis is formed
The injection of 3:1 ratio is using homogeneous membrane to transport in 25-27 DEG C in 0.1-0.3MPa in the electrodialytic light room of amberplex and dense room
Dense room NaCl solution concentration is promoted into the mass percent concentration to 15% under row pressure.
Application example 2: obstructing the positive osmosis concentration of extracting solution, and condensing mode is evaporated brine for MF+FO+
MF process: the 100L that the 65 DEG C of mass percent concentrations obtained in a manner of the primary purifying for spiral shell centrifugation+sedimentation of crouching are 9.8%
Obstruct extracting solution, is filtered through 200nm ceramic micro filter film, operating pressure terminates to filter when rising to 0.3MPa, obtains the quality percentage of 94L
The permeate that specific concentration is 9.7%, 30 DEG C of temperature.
FO process:
Primary concentration mode: the permeate (30 DEG C) that 10L concentration is 9.7% is placed in forward osmosis enriched chamber, polyamide just seeps
Permeable membrane is concentration film, draws liquid chamber and 15L saturation NaCl solution (30 DEG C) is added, starting circulating pump is concentrated.Operating pressure control
System is in 0.1-0.3MPa, when enriched chamber's material and when drawing the conductivity substantially constant of liquid chamber solution, stops concentration, obtains quality
The offal concentrate that percent concentration is 51.7%.It is 3950g that this condensing mode, which draws agent dosage,.
Three-level condensing mode:
Three-level condensing mode its main feature is that: the concentration that three-level forward osmosis is formed reduce after draw liquid as second level forward osmosis
Draw liquid, the liquid that draws after the concentration that second level forward osmosis is formed reduces draws liquid as level-one forward osmosis.Bleeding agent
Dosage determined by the liquid that draws that three-level forward osmosis uses.
(1) the MF penetrating fluid (30 DEG C) that 10L concentration is 9.7% is placed in forward osmosis enriched chamber, polyamide forward osmosis
Film is concentration film, and when primary concentration draws liquid chamber and the NaCl solution (30 DEG C) that 7.2L percent concentration is 14.3% is added, and starting follows
Ring pump is concentrated.Operating pressure control is in 0.1-0.15MPa, when enriched chamber's material and the conductivity for drawing liquid chamber solution are basic
When constant, stop concentration, obtains the level-one forward osmosis concentrate that mass percent concentration is 20.7%.
(2) after primary concentration, the liquid (DS) that draws after dilution is replaced as 5.1L mass per liter percent concentration and is
15.1% NaCl solution (30 DEG C) carries out secondary concentration by primary concentration mode, and operating pressure is controlled in 0.1-0.3MPa, obtained
The second level forward osmosis concentrate for being 31.5% to mass percent concentration.
(3) three-level is concentrated: after secondary concentration, the liquid (DS) that draws after dilution being replaced as 4L saturation NaCl solution
(30 DEG C) carry out three-level concentration by primary concentration mode, and operating pressure is controlled in 0.1-0.3MPa, obtains mass percent concentration
For 51.3% three-level forward osmosis concentrate.
It is 1050g that this three-level condensing mode, which draws agent dosage,.
It evaporates brine process: shining in salt pond, the liquid that draws of low concentration is concentrated by evaporation by drawing to high concentration with solar energy, wind energy
Liquid status, benefit are preferred up to crystal precipitation.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. a kind of tobacco extract concentration technology, which comprises the steps of:
Step (1) primary purifying: by tobacco extract impurity elimination, obtains suspension content and extracts in the tobacco primary purifying of 1-3%
Liquid；
Step (2), micro-filtration filtering: the film that the tobacco primary purifying extracting solution that step (1) obtains is used into aperture as 50-400nm
Micro-filtration is carried out at 0-100 DEG C, when operating pressure rises to 0.3MPa, is stopped filtering, is obtained trapped fluid and permeate；
Step (3), positive osmosis concentration: the permeate that step (2) is obtained carries out positive osmosis concentration, obtains tobacco extract concentration
Liquid and diluted draw liquid；
What concentration process used draws agent as inorganic acid salt and/or acylate；The inorganic acid salt cation is Na+、K+、
Mg2+、Ca2+Or NH4 +, anion Cl-、SO4 2-, HSO4 -、PO4 3-、HPO4 2-、H2PO4 −、CO3 2-、HCO3 -；Acylate is apple
Acid, sorbic acid, benzoic acid, lactic acid and citric acid potassium, sodium, ammonium salt；Thickening temperature is 5-45 DEG C, pressure 0.1-0.3MPa；
Concentration is using single-stage concentration or the multistage condensing mode of step by step concentration；
Step (4) draws liquid post-processing: by step (3) formed diluted to draw liquid dense using electrodialysis or by the way of evaporating brine
After contracting, the positive osmosis concentration process of reuse to step (3).
2. tobacco extract concentration technology according to claim 1, which is characterized in that the mode of step (1) impurity elimination is heavy
The combination of one or more of drop, centrifugation and filtering.
3. tobacco extract concentration technology according to claim 2, which is characterized in that the sedimentation includes natural subsidence
And chemical settling；The centrifugation includes butterfly centrifugal and the centrifugation of sleeping spiral shell；Described is filtered into plate compression, strainer filtering and filter
Cloth filtering.
4. tobacco extract concentration technology according to claim 1, which is characterized in that film employed in step (2) is
Inoranic membrane or organic film.
5. tobacco extract concentration technology according to claim 1, which is characterized in that film employed in step (2) is
Ceramic membrane, polyvinylidene fluoride film or polytetrafluoroethylene film.
6. tobacco extract concentration technology according to claim 1, which is characterized in that fenestra employed in step (2)
Diameter is 100-200nm, and thickening temperature is 10-40 DEG C.
7. tobacco extract concentration technology according to claim 1, which is characterized in that the trapped fluid obtained to step (2)
Isometric water is added, carries out micro-filtration filtration step again, obtained trapped fluid, which repeats, is added isometric water and micro-filtration
Filtration step 1-2 times merges permeate and carries out positive osmosis concentration.
8. tobacco extract concentration technology according to claim 1, which is characterized in that in step (3), drawing agent is
NaCl、CaCl2、NH4HCO3(NH4)2HPO4The combination of middle one or more；Thickening temperature is 15-35 DEG C；Positive osmosis concentration institute
The film used is doughnut forward osmosis membrane.
9. tobacco extract concentration technology according to claim 1, which is characterized in that in step (3), concentration is using step by step
The three-level condensing mode of concentrate, level-one, second level, three-level thickening amount are respectively 55-60%, 25-30%, 10- of total dehydrating amount
15%, amount to 100%；It is separation that film used by positive osmosis concentration, which is aquaporin, acetate fiber, triacetate fiber or polyamide,
The doughnut forward osmosis membrane of layer.
10. tobacco extract concentration technology according to claim 1, which is characterized in that in step (4), electric osmose eutectoid temperature
It is 20-35 DEG C, pressure 0.1-0.3MPa, using homogeneous membrane.
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| CN201811476023.4A CN109499369B (en) | 2018-12-04 | 2018-12-04 | Tobacco extract concentrating process |
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| CN111040879A (en) * | 2019-12-31 | 2020-04-21 | 云南中烟新材料科技有限公司 | Preparation method and application of grape concentrated juice for preparing tobacco flavor |
| CN111170989A (en) * | 2020-01-15 | 2020-05-19 | 云南中烟新材料科技有限公司 | Method for preparing nicotine sulfate |
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| CN112998310A (en) * | 2021-03-08 | 2021-06-22 | 山东瑞博斯烟草有限公司 | Concentrated solution of tobacco water extract, concentration method and application |
| CN113180284A (en) * | 2021-03-18 | 2021-07-30 | 云南中烟新材料科技有限公司 | Method for extracting and concentrating tobacco water extract |
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