CN103919272A - Cryo-concentration system and method for reconstituted tobacco extraction liquid - Google Patents
Cryo-concentration system and method for reconstituted tobacco extraction liquid Download PDFInfo
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- CN103919272A CN103919272A CN201410174647.6A CN201410174647A CN103919272A CN 103919272 A CN103919272 A CN 103919272A CN 201410174647 A CN201410174647 A CN 201410174647A CN 103919272 A CN103919272 A CN 103919272A
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Abstract
The invention discloses a cryo-concentration system and method for reconstituted tobacco extraction liquid. The cryo-concentration system is formed by sequentially connecting a pre-treating device, a refined liquid storage tank, a primary disc-tube reverse osmosis system, a secondary disc-tube reverse osmosis system and a concentrated liquid storage tank. The cryo-concentration system further comprises a cleaning device which is connected with the primary disc-tube reverse osmosis system. According to the cryo-concentration system, as a disc-tube reverse osmosis film is adopted for concentration, the loss of thermo-sensitive substances in the extraction liquid can be greatly lowered, flavor ingredients in the tobacco extraction liquid can be kept, and the concentration multiple of the disc-tube reverse osmosis film is far larger than that of a common reverse osmosis film. In addition, the cryo-concentration system further has the advantages of being small in occupied area, low in operation cost, high in automation degree and the like. The cryo-concentration method comprises the steps that firstly, the extraction liquid is pretreated; afterwards, two levels of concentration are performed on the extraction liquid through the disc-tube reverse osmosis systems at 5-40 DEG C, and the concentration of the extraction liquid is concentrated from 2.5-8 percent to 30-45 percent. As high-temperature concentration is not required, the loss of the thermo-sensitive substances in the extraction liquid can be greatly lowered, and meanwhile energy consumption is greatly lowered.
Description
Technical field
The invention belongs to reconstituted tobacco technical field, a kind of papermaking-method reconstituted tobaccos extract low temperature concentration systems specifically, the invention still further relates to the low temperature method for concentration of reconstituted tobacco extract.
Technical background
Reconstituted tobacco, has another name called reconstituted tobacoo, originates from the 1950's, its development experience roll-in, thick slurry, 3 processes of papermaking.Papermaking-method reconstituted tobaccos is to utilize the raw materials such as discarded offal, tobacco leaf fragment or offal, through extracting, concentrated, perfuming, separation, pull an oar, manufacture paper with pulp, the tobacco leaf substrate of function admirable that the technical process such as oven dry is made, be commonly used for cigarette filler, be back to production of cigarettes.Development along with papermaking-method reconstituted tobaccos, Cigarette Industrial Enterprise and scientific research institutions deepen continuously for the understanding of papermaking-method reconstituted tobaccos, attention degree is also continuing to increase, and actively develops papermaking-method reconstituted tobaccos application technical research, and papermaking-method reconstituted tobaccos application technology level is significantly improved.
At present in tobacco sheets by paper making method production technology, the method for concentration of extract is mainly reduction vaporization method, reduction vaporization method is owing to there being the problem that energy consumption is large, operating cost is higher, the energy-saving and emission-reduction policy of the increasingly stringent proposing with country does not conform to yet, in addition, and due to temperature in evaporation process higher (65 ℃), active ingredient in feed liquid (as fragrance matter) also may go bad or be evaporated, thereby affects the quality of final tobacco.Membrane separation technique is as an emerging isolation technics, the concentrated loss that can greatly reduce extract flavor substances for reconstituted tobacco extract, have advantages of that operating cost is low, energy consumption is little, can keep the flavor components in concentrate, in the production technology of papermaking-method reconstituted tobaccos, be widely applied.Patent CN102823935A discloses a kind of concentration method of tobacco extract, adopt wide runner rolling reverse osmosis composite membrane assembly, it is 16%～18% final concentrate that tobacco extract is concentrated into mass percent concentration from initial mass percent concentration 0.5%～2%, but the final concentrate of the method can not reach the concentration (in industry, General Requirements mass percent concentration is more than 30%) of technological requirement, need to be further further concentrated by the mode of reduction vaporization, not only can increase the loss of flavor substance, and film condensing device and reduction vaporization equipment all need to drop into, equipment investment is larger.
Summary of the invention
The technical problem to be solved in the present invention is the shortcomings such as the extract evaporation and concentration energy consumption existing in producing for existing papermaking-method reconstituted tobaccos is large, operating cost is high, and the reconstituted tobacco extract low temperature that a kind of energy consumption is low, operating cost is low concentration systems is provided.
Another technical problem that the present invention will solve is, a kind of low temperature method for concentration of reconstituted tobacco extract is provided, and the method takes low temperature repeatedly concentrated, makes final concentrate mass percent concentration reach 30%, and the loss that reduces thermal sensitivity flavor substance is little.
For solving the problems of the technologies described above, the invention provides a kind of reconstituted tobacco extract low temperature concentration systems, comprise connected successively pretreatment unit, refined liquid storage tank, one-level disc tube reverse osmosis (dt-ro) system, secondary disc tube reverse osmosis (dt-ro) system and concentrate storage tank, also comprise cleaning device, described cleaning device is connected with one-level disc tube reverse osmosis (dt-ro) system.
Described pretreatment unit is one or more the combination in sand filtration, rectangular mesh screen, centrifuge or milipore filter.
Described one-level disc tube reverse osmosis (dt-ro) system comprises connected successively filter, one-level high-pressure pump, one-level disc tube reverse osmosis (dt-ro) device, one-level densimeter and first grade discharging valve, on one-level high-pressure pump and one-level densimeter, is also parallel with one-level return valve.
Described secondary disc tube reverse osmosis (dt-ro) system comprises successively connected secondary high-pressure pump, secondary disc tube reverse osmosis (dt-ro) device, two-stage concentration meter and secondary drain valve, on secondary high-pressure pump and two-stage concentration meter, is also parallel with secondary return valve.
Described cleaning device comprises cleaning fluid storage tank and cleaning fluid inlet valve.
Reconstituted tobacco extract low temperature concentration systems of the present invention, can under room temperature (5～40 ℃), to reconstituted tobacco extract, concentrate, concentration process is without phase transformation, can greatly reduce the loss of heat-sensitive substance in extract, retain the flavor component in tobacco extraction liquid, cycles of concentration is concentrated far above ordinary RO membrane, and energy consumption is far below traditional evaporation and concentration, this system also utilizes cleaning device to clean one-level disc tube reverse osmosis (dt-ro) system and secondary disc tube reverse osmosis (dt-ro) system, improve the utilization rate of membrane module in one-level disc tube reverse osmosis (dt-ro) system and secondary disc tube reverse osmosis (dt-ro) system, and increase one-level concentrate return valve and two one-level concentrate return valves, thereby it is concentrated to carry out repeatedly film, make concentrate reach industry requirement, this system also has advantages of that floor space is little, operating cost is low and automaticity is high.
For solving another technical problem, the invention provides a kind of low temperature method for concentration of reconstituted tobacco extract, comprise the following steps:
(1) reconstituted tobacco extract is sent into and in pretreatment unit, carried out that sand filtration, rectangular mesh screen are considered, centrifuge is centrifugal or the pretreatment such as ultrafiltration membrance filter, obtain refined liquid, send into refined liquid storage tank, described extract mass percent concentration is 2.5～8%;
(2) exquisite liquid is delivered to one-level disc tube reverse osmosis (dt-ro) film system by booster pump, at pressure, be 5～10 MPa, 5～40 ℃ of temperature, film surface velocity is to concentrate under the condition of 2.5～3.5 m/s, obtain one-level concentrate, one-level concentrate mass percent concentration is 12～20%;
(3) one-level concentrate being delivered to secondary disc tube reverse osmosis (dt-ro) film system, is 8～15 MPa at pressure, 5～35 ℃ of temperature, film surface velocity is to concentrate under the condition of 2～3 m/s again, obtain secondary concentrate, send into concentrate storage tank, secondary concentrate mass percent concentration is 30～45%.
The described one-level disc tube reverse osmosis (dt-ro) system of step (2) comprises connected successively filter, one-level high-pressure pump, one-level disc tube reverse osmosis (dt-ro) device, one-level densimeter and first grade discharging valve, on one-level high-pressure pump and one-level densimeter, is also parallel with one-level return valve.Concentrate after one-level disc tube reverse osmosis (dt-ro) device is concentrated is after one-level densimeter is measured concentration, what do not reach that expection requires pumps into one-level disc tube reverse osmosis (dt-ro) device through one-level return valve and concentrates, and what reach that expection requires pumps into secondary disc tube reverse osmosis (dt-ro) system through first grade discharging valve.
The described secondary disc tube reverse osmosis (dt-ro) system of step (3) comprises successively connected secondary high-pressure pump, secondary disc tube reverse osmosis (dt-ro) device, two-stage concentration meter and secondary drain valve, on secondary high-pressure pump and two-stage concentration meter, is also parallel with secondary return valve.Concentrate after secondary disc tube reverse osmosis (dt-ro) device is concentrated is after two-stage concentration instrumentation amount concentration, what do not reach that expection requires pumps into secondary disc tube reverse osmosis (dt-ro) device through secondary return valve and concentrates, reaches expection requires pump in concentrate storage tank and store through secondary drain valve.
The low temperature method for concentration of reconstituted tobacco extract of the present invention, adopt disc tube reverse osmosis (dt-ro) film system bi-level treatment mode, the mass percent concentration of extract is concentrated into 30～45% by 2.5～8%, greatly reduce the loss of heat-sensitive substance in extract, retain the flavor component in tobacco extraction liquid, cycles of concentration is concentrated far above ordinary RO membrane, simultaneously, the energy consumption of the method is far below traditional evaporation and concentration, and disc tube reverse osmosis (dt-ro) film system also has advantages of that floor space is little, operating cost is low and automaticity is high.
figure of description
Fig. 1 is the formation schematic diagram of reconstituted tobacco extract low temperature concentration systems of the present invention.
The specific embodiment
By the specific embodiment, invention is described further below.The specific embodiment described herein is only to explain invention, the protection domain being not intended to limit the present invention.
Embodiment 1:
Reconstituted tobacco extract low temperature concentration systems, as shown in Figure 1, comprise connected successively pretreatment unit 1, refined liquid storage tank 2, valve 3, booster pump 4, one-level disc tube reverse osmosis (dt-ro) system, secondary disc tube reverse osmosis (dt-ro) system and concentrate storage tank 16, also comprise cleaning fluid storage tank 17 and cleaning fluid inlet valve 18, cleaning fluid storage tank 17 is connected with one-level disc tube reverse osmosis (dt-ro) system through cleaning fluid inlet valve 18.
Described pretreatment unit 1 is centrifuge.
Described one-level disc tube reverse osmosis (dt-ro) system comprises connected successively filter 5, one-level high-pressure pump 6, one-level disc tube reverse osmosis (dt-ro) device 7, one-level densimeter 8 and first grade discharging valve 10, on one-level high-pressure pump 6 and one-level densimeter 8, is also parallel with one-level return valve 9.
If the concentrate after one-level disc tube reverse osmosis (dt-ro) device 7 is concentrated reaches expection concentration requirement, first grade discharging valve 10 is opened, and concentrate enters secondary disc tube reverse osmosis (dt-ro) system and concentrates; If the concentrate after one-level disc tube reverse osmosis (dt-ro) device 7 is concentrated does not reach expection concentration requirement, one-level return valve 9 is opened, and concentrate is pumped in one-level disc tube reverse osmosis (dt-ro) device 7 and concentrated by one-level high-pressure pump 6, until concentration reaches expection requirement.
Described secondary disc tube reverse osmosis (dt-ro) system comprises successively connected secondary high-pressure pump 11, secondary disc tube reverse osmosis (dt-ro) device 12, two-stage concentration meter 13 and secondary drain valve 15, on secondary high-pressure pump 11 and two-stage concentration meter 13, is also parallel with secondary return valve 14.
If the concentrate after secondary disc tube reverse osmosis (dt-ro) device 12 is concentrated reaches expection concentration requirement, secondary drain valve 15 is opened, and concentrate enters concentrate storage tank 16 and stores; If the concentrate after secondary disc tube reverse osmosis (dt-ro) device 12 is concentrated does not reach expection concentration requirement, secondary return valve 14 is opened, and concentrate pumps into secondary disc tube reverse osmosis (dt-ro) device 12 by secondary high-pressure pump 11 and concentrates, until concentration reaches expection requirement.
Embodiment 2
Reconstituted tobacco extract low temperature method for concentration, comprises the following steps:
(1) offal, offal extract (mass percent concentration is 4%) are sent into pretreatment in rectangular mesh screen (pretreatment unit 1), removed the suspended materials such as fiber fines in extract, obtain refined liquid, send into refined liquid storage tank 2;
(2) open valve 3, exquisite liquid is delivered in one-level disc tube reverse osmosis (dt-ro) device 7 through filter 5, one-level high-pressure pump 6 successively by booster pump 4, at pressure, be 5 MPa, 40 ℃ of temperature, film surface velocity is to concentrate under the condition of 2.5 m/s, obtain one-level concentrate, through one-level densimeter 8, measure, one-level concentrate mass percent concentration is 20%;
(3) open first grade discharging valve 10, one-level concentrate is delivered in secondary disc tube reverse osmosis (dt-ro) film device 12 through secondary high-pressure pump 11, at pressure, be 12 MPa, 35 ℃ of temperature, film surface velocity is to concentrate under the condition of 2.5 m/s again, obtains secondary concentrate, sends into concentrate storage tank 16, through two-stage concentration meter 13, measure, secondary concentrate mass percent concentration is 35%.
(4) concentrated complete, shut off valve 3, opens cleaning fluid inlet valve 18, and the cleaning fluid in cleaning fluid storage tank pumps in one-level disc tube reverse osmosis (dt-ro) film device 7 and secondary disc tube reverse osmosis (dt-ro) film device 12 and cleans, and cleans waste water and is expelled to waste water storage tank.
Embodiment 3:
Reconstituted tobacco extract low temperature method for concentration, comprises the following steps:
(1) offal, offal extract (mass percent concentration is 2.5%) are sent into pretreatment in centrifuge (pretreatment unit 1), removed the solid impurity in extract, obtain refined liquid, send into refined liquid storage tank 2;
(2) open valve 3, exquisite liquid is delivered in one-level disc tube reverse osmosis (dt-ro) device 7 through filter 5, one-level high-pressure pump 6 successively by booster pump 4, at pressure, be 5 MPa, 5 ℃ of temperature, film surface velocity is to concentrate under the condition of 2.5 m/s, obtain one-level concentrate, through one-level densimeter 8, measure, one-level concentrate mass percent concentration is 12%;
(3) open first grade discharging valve 10, one-level concentrate is delivered in secondary disc tube reverse osmosis (dt-ro) film device 12 through secondary high-pressure pump 11, at pressure, be 8 MPa, 5 ℃ of temperature, film surface velocity is to concentrate under the condition of 2 m/s again, obtains secondary concentrate, sends into concentrate storage tank 16, through two-stage concentration meter 13, measure, secondary concentrate mass percent concentration is 30%.
(4) concentrated complete, shut off valve 3, opens cleaning fluid inlet valve 18, and the cleaning fluid in cleaning fluid storage tank pumps in one-level disc tube reverse osmosis (dt-ro) film device 7 and secondary disc tube reverse osmosis (dt-ro) film device 12 and cleans, and cleans waste water and is expelled to waste water storage tank.
Embodiment 4:
Reconstituted tobacco extract low temperature method for concentration, comprises the following steps:
(1) offal, offal extract (mass percent concentration is 8%) are sent into pretreatment in milipore filter (pretreatment unit 1), removed solid and soluble large molecule material in extract, obtain refined liquid, send into refined liquid storage tank 2;
(2) open valve 3, exquisite liquid is delivered in one-level disc tube reverse osmosis (dt-ro) device 7 through filter 5, one-level high-pressure pump 6 successively by booster pump 4, at pressure, be 10 MPa, 40 ℃ of temperature, film surface velocity is to concentrate under the condition of 3 m/s, obtain one-level concentrate, through one-level densimeter 8, measure, one-level concentrate mass percent concentration is 20%;
(3) open first grade discharging valve 10, one-level concentrate is delivered in secondary disc tube reverse osmosis (dt-ro) film device 12 through secondary high-pressure pump 11, at pressure, be 15 MPa, 5 ℃ of temperature, film surface velocity is to concentrate under the condition of 2 m/s again, obtains secondary concentrate, sends into concentrate storage tank 16, through two-stage concentration meter 13, measure, secondary concentrate mass percent concentration is 45%.
(4) concentrated complete, shut off valve 3, opens cleaning fluid inlet valve 18, and the cleaning fluid in cleaning fluid storage tank pumps in one-level disc tube reverse osmosis (dt-ro) film device 7 and secondary disc tube reverse osmosis (dt-ro) film device 12 and cleans, and cleans waste water and is expelled to waste water storage tank.
Embodiment 5:
Reconstituted tobacco extract low temperature method for concentration, comprises the following steps:
(1) offal, offal extract (mass percent concentration is 5%) are sent into pretreatment in sand filtration (pretreatment unit 1), removed the suspension material in extract, obtain refined liquid, send into refined liquid storage tank 2;
(2) open valve 3, exquisite liquid is delivered in one-level disc tube reverse osmosis (dt-ro) device 7 through filter 5, one-level high-pressure pump 6 successively by booster pump 4, at pressure, be 6 MPa, 25 ℃ of temperature, film surface velocity is to concentrate under the condition of 3.5 m/s, obtain one-level concentrate, through one-level densimeter 8, measure, one-level concentrate mass percent concentration is 15%;
(3) open first grade discharging valve 10, one-level concentrate is delivered in secondary disc tube reverse osmosis (dt-ro) film device 12 through secondary high-pressure pump 11, at pressure, be 12 MPa, 25 ℃ of temperature, film surface velocity is to concentrate under the condition of 3 m/s again, obtains secondary concentrate, sends into concentrate storage tank 16, through two-stage concentration meter 13, measure, secondary concentrate mass percent concentration is 40%.
(4) concentrated complete, shut off valve 3, opens cleaning fluid inlet valve 18, and the cleaning fluid in cleaning fluid storage tank pumps in one-level disc tube reverse osmosis (dt-ro) film device 7 and secondary disc tube reverse osmosis (dt-ro) film device 12 and cleans, and cleans waste water and is expelled to waste water storage tank.
The above is only the specific embodiment of the present invention; should be understood that; for the person of ordinary skill of the art; under the premise without departing from the principles of the invention; can also carry out some distortion or be equal to replacement technical scheme of the present invention, these also should be considered as belonging to protection scope of the present invention.
Claims (9)
1. reconstituted tobacco extract low temperature concentration systems, comprise connected successively pretreatment unit, refined liquid storage tank, one-level disc tube reverse osmosis (dt-ro) system, secondary disc tube reverse osmosis (dt-ro) system and concentrate storage tank, it is characterized in that: also comprise cleaning device, described cleaning device is connected with one-level disc tube reverse osmosis (dt-ro) system.
2. reconstituted tobacco extract low temperature concentration systems as claimed in claim 1, is characterized in that: described pretreatment unit is one or more the combination in sand filtration, rectangular mesh screen, centrifuge or milipore filter.
3. reconstituted tobacco extract low temperature concentration systems as claimed in claim 1, it is characterized in that: described one-level disc tube reverse osmosis (dt-ro) system comprises connected successively filter, one-level high-pressure pump, one-level disc tube reverse osmosis (dt-ro) device, one-level densimeter and first grade discharging valve, on one-level high-pressure pump and one-level densimeter, is also parallel with one-level return valve.
4. the reconstituted tobacco extract low temperature concentration systems as described in claim 1 or 3, it is characterized in that: described secondary disc tube reverse osmosis (dt-ro) system comprises successively connected secondary high-pressure pump, secondary disc tube reverse osmosis (dt-ro) device, two-stage concentration meter and secondary drain valve, on secondary high-pressure pump and two-stage concentration meter, is also parallel with secondary return valve.
5. reconstituted tobacco extract low temperature concentration systems as claimed in claim 1, is characterized in that: described cleaning device comprises cleaning fluid storage tank and cleaning fluid inlet valve.
6. reconstituted tobacco extract low temperature method for concentration, comprises the following steps:
(1) reconstituted tobacco extract is sent into pretreatment unit and carry out pretreatment, obtain refined liquid, send into refined liquid storage tank, described extract mass percent concentration is 2.5～8%;
(2) refined liquid is delivered to one-level disc tube reverse osmosis (dt-ro) film system, at pressure, be 5～10 MPa, 5～40 ℃ of temperature, film surface velocity is to concentrate under the condition of 2.5～3.5 m/s, obtain one-level concentrate, one-level concentrate mass percent concentration is 12～20%;
(3) one-level concentrate being delivered to secondary disc tube reverse osmosis (dt-ro) film system, is 8～15 MPa at pressure, 5～35 ℃ of temperature, film surface velocity is to concentrate under the condition of 2～3 m/s again, obtain secondary concentrate, send into concentrate storage tank, secondary concentrate mass percent concentration is 30～45%.
7. reconstituted tobacco extract low temperature method for concentration as claimed in claim 6, is characterized in that: the described pretreatment of step (1) refer to that sand filtration, rectangular mesh screen are considered, centrifuge is centrifugal or ultrafiltration membrance filter in one or more combination.
8. reconstituted tobacco extract low temperature method for concentration as claimed in claim 6, it is characterized in that: the described one-level disc tube reverse osmosis (dt-ro) system of step (2) comprises connected successively filter, one-level high-pressure pump, one-level disc tube reverse osmosis (dt-ro) device, one-level densimeter and first grade discharging valve, on one-level high-pressure pump and one-level densimeter, is also parallel with one-level return valve.
9. reconstituted tobacco extract low temperature method for concentration as claimed in claim 6, it is characterized in that: the described secondary disc tube reverse osmosis (dt-ro) system of step (3) comprises successively connected secondary high-pressure pump, secondary disc tube reverse osmosis (dt-ro) device, two-stage concentration meter and secondary drain valve, on secondary high-pressure pump and two-stage concentration meter, is also parallel with secondary return valve.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110025036A (en) * | 2019-05-10 | 2019-07-19 | 湖北中烟工业有限责任公司 | A kind of preparation method of sweet orange odor type reconstituted tobacco |
| 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 |
| CN110367415A (en) * | 2019-08-16 | 2019-10-25 | 章志强 | A kind of plant beverage enrichment facility and concentration process |
| CN112457917A (en) * | 2020-11-04 | 2021-03-09 | 上海烟草集团有限责任公司 | Method for recovering flavor components in reconstituted tobacco condensed water, eluent formed by method and application |
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