CN108685143A

CN108685143A - A kind of Upper Leaf of Flue-cured Tobacco low humidity fixation baking process

Info

Publication number: CN108685143A
Application number: CN201810402775.XA
Authority: CN
Inventors: 陈振国; 孙光伟; 孙敬国; 李建平; 王昌军; 樊友伦
Original assignee: Tobacco Research Institute of Hubei Province
Current assignee: Tobacco Research Institute of Hubei Province
Priority date: 2018-04-28
Filing date: 2018-04-28
Publication date: 2018-10-23

Abstract

The present invention provides a kind of Upper Leaf of Flue-cured Tobacco low humidity fixation baking process, and the baking process includes mainly the flavescence high temperature and humidity early period rush yellow stage, the later stage that turns yellow, surely warm low humidity dehydration stage, Earlier stage of fixing color low temperature and low humidity dry plate stage, fixation mid-term heated up moisturizing change muscle stage, six baking stages of fixation later stage and dry muscle stage.The problem of technique of the present invention is mainly for easy dust during Upper Leaf of Flue-cured Tobacco baking fixation and blue veins, by controlling bulk curing barn fixation humiture environment and tobacco leaf desiccation, reduces the generation of dust and blue veins cigarette, increases orange cigarette and first-class cigarette ratio.

Description

A kind of Upper Leaf of Flue-cured Tobacco low humidity fixation baking process

Technical field

The invention belongs to technical field of tobacco modulation, and in particular to a kind of Upper Leaf of Flue-cured Tobacco low humidity fixation baking process.

Background technology

Upper leaf is located at the top of cigarette strain, and illumination and nutritional condition are preferable, and the blade content of formation is more, blade compared with Thickness, dehydration is more difficult in baking process, easily occurs after baking containing green (blue veins, floating blueness), dust, the roasting variegated cigarette phenomenon such as red, seriously Affect the interests of tobacco grower and enterprise.Upper leaf baking process depends on traditional three-phase-drying for tobacco technique, but these at present Technique mainly emphasizes " low temperature and low humidity flavescence " " medium temperature, in wet flavescence " " gradually heat up fixation ", since three-phase-drying for tobacco technique is The technical specification of a universality, the empirical description for mainly testing out using traditional traditional flue-curing barn, accurate figureofmerit is less, Operation is more random, easily slips up, and the technology and skill requirement to operator are high, and there are no what is toasted for upper leaf to have ginseng Examine the standard of meaning.A kind of tree-sections and five-steps type method for flue-curing tobacco leaves and publication number disclosed in China Patent Publication No. CN1444879 Intensive curing barn precise curing process for flue-cured tobacco disclosed in CN102178335A improves baking quality of tobacco, but cannot be complete Baking property with upper leaf has that roasting rear variegated cigarette ratio is higher.

Invention content

The present invention is easy to happen dust for upper leaf baking fixation, steams the browning phenomenons such as piece in the process, fixed by controlling Color phase blade degree of drying and baking temperature and humidity conditions, avoid the generation of browning reaction.

Technical scheme is as follows:

A kind of Upper Leaf of Flue-cured Tobacco low humidity fixation baking process, it is characterised in that:Include the following steps:

1) after upper tobacco leaf harvesting, volume cigarette is carried out by maturity classification, according to bulk curing barn streamer mode, by maturity compared with Good is placed in air outlet heat zone, by maturity it is poor be placed in lower one layer of return air inlet temperature, close door after filling cigarette And cold-air flap, igniting, wind turbine low-speed running are not higher than 720rad/min, dry-bulb temperature are risen to 40 DEG C with 1 DEG C/h, wet bulb temperature Degree is set as 38 DEG C, and based on Temperature and Humidity Control is popped one's head in high-temperature region, steady temperature is entirely yellow to blade, and offshoot is containing blueness, leaf base fraction Containing blueness;

2) after tobacco leaf reaches the requirement of step 1), 42 DEG C of dry-bulb temperature, wet-bulb temperature 38 are warming up to 0.5 DEG C/h speed DEG C, wind turbine blast velocity control turns yellow in 960rad/min, steady temperature to tobacco leaf completely at this time, and offshoot is containing blueness, tobacco leaf and master pulse hair It is soft;

3) after tobacco leaf reaches the requirement of step 2), keep dry-bulb temperature constant, wet-bulb temperature is down to 0.5 DEG C/h speed 35 DEG C, for wind turbine blast velocity control in 960rad/min, steady temperature is entirely yellow to two level offshoot, and blade tip drying, blade falls down;

4) after tobacco leaf reaches the requirement of step 3), dry-bulb temperature is warming up to 45 DEG C with 0.5 DEG C/h speed, wet-bulb temperature 36 DEG C, wind turbine middling speed operates 960rad/min, and steady temperature to level-one offshoot turns yellow, blade crimping;

5) after tobacco leaf reaches the requirement of step 4), dry-bulb temperature is warming up to 48 DEG C with 0.5 DEG C/h speed, wet-bulb temperature 36 DEG C, wind turbine middling speed operates 960rad/min, and steady temperature to master pulse turns yellow, more than blade half dry;

6) after tobacco leaf reaches the requirement of step 5), the 720rad/min operatings of wind turbine low speed are heated up with 1 DEG C/h speed, until 52 DEG C of dry-bulb temperature, 39 DEG C of wet-bulb temperature, steady temperature to blade are dried, the drying of master pulse half;

7) after tobacco leaf reaches the requirement of step 6), wind turbine low speed 720rad/min operating, after heated up with 2 DEG C/h speed, To 68 DEG C of dry-bulb temperature, 42 DEG C of wet-bulb temperature, until cigarette muscle is dried.

The good effect that the present invention has is:

This programme operability is strong, effectively solves the generation that upper leaf fixation baking dust, steaming piece etc. bake brown phenomenon, carries The quality of tobacco of high flue-cured tobacco reduces tobacco grower's loss;Tobacco leaf early period that turns yellow is in the environment of high temperature and humidity, when being conducive to shorten flavescence Between, the later stage that turns yellow maintains the constant reduction wet-bulb temperature of dry-bulb temperature, and tobacco leaf water content is reduced taking a step forward into fixation stage;It is fixed The color phase maintains lower wet-bulb temperature, controls lower biochemical reactions temperature in tobacco leaf, reduces blowning reaction phase The activity of enzyme is closed, mitigates the generation that browning degree avoids variegated cigarette, while the lower dry-bulb temperature of beforehand control, tobacco leaf is avoided to lose The too fast and roasting blueness of water.

Description of the drawings

Fig. 1 is the baking process curve graph of the present invention.

Note:Figure only shows the technique humiture of the present invention surely the warm time is not limited to each temperature spot, needs basis Tobacco leaf variation is adjusted flexibly.

Specific implementation mode

The present invention is done below in conjunction with the drawings and specific embodiments and is further described in detail:

Embodiment one:To Hubei Province place of production cloud and mist 87, the primary harvesting of upper leaf four, using the rack-mounted cigarette of conventional hanging rod, Baking process using the present invention carries out following concrete operations in air-flow rising-type bulk curing barn:

(1) bulk curing barn is equipped with flue-cured tobacco controller, wind turbine, cold-air flap, humiture probe;Roasting plant inspection before dress cigarette, Humiture probe hangs over lower canopy tobacco leaf blade tip position mounted in canopy probe under cigarette-filling house, and upper canopy probe hangs over canopy tobacco leaf blade tip position It sets, is controlled according to lower canopy humiture probe when baking;Cigarette-filling house's humiture situation that flue-cured tobacco controller control passes through induction Automatically control heat supply and hydrofuge;After upper tobacco leaf harvesting, volume cigarette is carried out by maturity classification, according to bulk curing barn streamer mode, Maturity is preferably placed in air outlet heat zone, by maturity it is poor be placed in lower one layer of return air inlet temperature, dress cigarette is complete Door and cold-air flap, igniting are closed after finishing, wind turbine low-speed running is not higher than 720rad/min, dry-bulb temperature is risen to 40 with 1 DEG C/h DEG C, wet-bulb temperature is set as 38 DEG C, and based on Temperature and Humidity Control is popped one's head in high-temperature region, steady temperature is entirely yellow to blade, and offshoot is containing blueness, phyllopodium Portion's fraction is containing blueness;

(2) after tobacco leaf reaches the requirement of step (1), 42 DEG C of dry-bulb temperature, wet-bulb temperature are warming up to 0.5 DEG C/h speed 38 DEG C, wind turbine blast velocity control is in 960rad/min at this time, and surely warm to turn yellow completely to tobacco leaf, offshoot is containing blueness, tobacco leaf and master pulse Feel like jelly;

(3) after tobacco leaf reaches the requirement of step (2), keep dry-bulb temperature constant, wet-bulb temperature is dropped with 0.5 DEG C/h speed To 35 DEG C, for wind turbine blast velocity control in 960rad/min, steady temperature is entirely yellow to two level offshoot, and blade tip drying, blade falls down;

(4) after tobacco leaf reaches the requirement of step (3), dry-bulb temperature is warming up to 45 DEG C with 0.5 DEG C/h speed, wet-bulb temperature 36 DEG C, wind turbine middling speed operates 960rad/min, and steady temperature to level-one offshoot turns yellow, blade crimping;

(5) after tobacco leaf reaches the requirement of step (4), dry-bulb temperature is warming up to 48 DEG C with 0.5 DEG C/h speed, wet-bulb temperature 36 DEG C, wind turbine middling speed operates 960rad/min, and steady temperature to master pulse turns yellow, more than blade half dry;

(6) after tobacco leaf reaches the requirement of step (5), the 720rad/min operatings of wind turbine low speed are heated up with 1 DEG C/h speed, To 52 DEG C of dry-bulb temperature, 39 DEG C of wet-bulb temperature, steady temperature to blade is dried, the drying of master pulse half;

(7) after tobacco leaf reaches the requirement of step (6), wind turbine low speed 720rad/min operating, after with 2 DEG C/h speed liters Temperature, until 68 DEG C of dry-bulb temperature, 42 DEG C of wet-bulb temperature, until cigarette muscle is dried.

It is toasted using the above method, baking cured tobacco leaf is orange, and first-class cigarette ratio is higher, and presentation quality is good.

Embodiment two is to the upper tobacco leaf of Hubei Province place of production cloud and mist 87, using following two baking process:T1 is hanging rod Baking uses three-phase-drying for tobacco technique (existing common process), and using technique of the present invention, (upper leaf low humidity fixation dries T2 Curing process), it is configured according to the baking curve of attached drawing 1, surely the warm time turned yellow according to tobacco leaf and degree of drying is real-time each stage Regulation and control, are compared cured tobacco leaf economic characters, presentation quality.It the results are shown in Table 1.

1 cured tobacco leaf economic characters of table

Technique of the invention and common process are improved compared to the orange cigarette ratio of cured tobacco leaf as can be seen from Table 1, containing green miscellaneous Cigarette ratio is relatively low, and average price is higher.

Claims

1. a kind of Upper Leaf of Flue-cured Tobacco low humidity fixation baking process, it is characterised in that:Include the following steps:

1) after upper tobacco leaf harvesting, volume cigarette is carried out by maturity classification, it is according to bulk curing barn streamer mode, maturity is preferable Be placed in air outlet heat zone, by maturity it is poor be placed in lower one layer of return air inlet temperature, door and cold is closed after filling cigarette Air door, igniting, wind turbine low-speed running are not higher than 720rad/min, dry-bulb temperature are risen to 40 DEG C with 1 DEG C/h, wet-bulb temperature is set It is set to 38 DEG C, based on Temperature and Humidity Control is popped one's head in high-temperature region, steady temperature is entirely yellow to blade, and offshoot is containing blueness, and leaf base fraction is containing blueness;

2) after tobacco leaf reaches the requirement of step 1), 42 DEG C of dry-bulb temperature is warming up to 0.5 DEG C/h speed, 38 DEG C of wet-bulb temperature, Wind turbine blast velocity control turns yellow in 960rad/min, steady temperature to tobacco leaf completely at this time, and containing blueness, tobacco leaf and master pulse feel like jelly offshoot;

3) after tobacco leaf reaches the requirement of step 2), keep dry-bulb temperature constant, wet-bulb temperature is down to 35 with 0.5 DEG C/h speed DEG C, for wind turbine blast velocity control in 960rad/min, steady temperature is entirely yellow to two level offshoot, and blade tip drying, blade falls down;

4) after tobacco leaf reaches the requirement of step 3), dry-bulb temperature is warming up to 45 DEG C with 0.5 DEG C/h speed, 36 DEG C of wet-bulb temperature, Wind turbine middling speed operates 960rad/min, and steady temperature to level-one offshoot turns yellow, blade crimping;

5) after tobacco leaf reaches the requirement of step 4), dry-bulb temperature is warming up to 48 DEG C with 0.5 DEG C/h speed, 36 DEG C of wet-bulb temperature, Wind turbine middling speed operates 960rad/min, and steady temperature to master pulse turns yellow, more than blade half dry;

6) after tobacco leaf reaches the requirement of step 5), the 720rad/min operatings of wind turbine low speed are heated up with 1 DEG C/h speed, until dry bulb 52 DEG C of temperature, 39 DEG C of wet-bulb temperature, steady temperature to blade are dried, the drying of master pulse half;

7) after tobacco leaf reaches the requirement of step 6), wind turbine low speed 720rad/min operating, after heated up with 2 DEG C/h speed, to doing 68 DEG C of ball temperature, 42 DEG C of wet-bulb temperature, until cigarette muscle is dried.