CN101002629A

CN101002629A - Coherent flue-curing system moisture-removing method

Info

Publication number: CN101002629A
Application number: CN 200610003838
Authority: CN
Inventors: 杨正跻
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-01-22
Filing date: 2006-01-22
Publication date: 2007-07-25

Abstract

A continuous demoistening-baking method for flue-curing tobacco leaves in order to control the moisture and temp well and synchronize the yellowing with softening of tobacco leaves features that a thermometer is arranged at a continuous high-temp position in high-temp region and another is arranged at the roof window.

Description

Coherent flue-curing system moisture-removing method

The present invention relates to the overall process of flue-cured tobacco in bake process, particularly baking be difficult to fixation contain bigger lower tobacco leaf of moisture and difficult baking contain the less and thicker upper tobacco leaf of moisture, and the dress cigarette is too many, under the too close condition.

Present known conventional syllogic baking (being designated hereinafter simply as conventional baking).Bright leaf is packed into behind the barn, close the hole in the ground, skylight tight, and get the special-purpose wet-and-dry-bulb thermometer of a baking of flue-cured tobacco, place base frame door limit or place two watch windows, and progressively temperature is raised to 35 ℃-39 ℃, do wet difference about 2 ℃ by the wall limit.Reach 8-9 at this temperature section up to the tobacco leaf flavescence and become Huang to begin the hydrofuge that heats up, enter fixation stage, and progressively open the hole in the ground, skylight, and progressively strengthen the hole in the ground, skylight along with the rising of humiture.Under the prerequisite of 38 ℃ of-39 ℃ of temperature, temperature progressively is raised to 45 ℃ from 40 ℃, along with the complete flavescence temperature of tobacco leaf rises to 50 ℃-55 ℃, with the tobacco leaf fixation.After fixation finishes, dwindle the hole in the ground, skylight gradually, temperature is raised to 68 ℃ all dries up to the cigarette muscle.

The main baking technology factor of the roasting bad tobacco leaf of syllogic baking at present is:

1, gets a thermometer and place base frame to depend on Men Bian or place two by the wall watch window, close the hole in the ground, skylight tight and make changing yellow stage.So, because of these two positions of putting thermometer all are the slower positions of temperature sense, sometimes accidentally temperature is raise at changing yellow stage, Deng the thermometer induction here, the high-temperature region, Longkou is easy to tobacco leaf roasting blue or green, and at drying muscle stage also because of the difference of high low-temperature space, these two positions all belong to low-temperature space, Yin Wendu grasps inaccurate and bakes the tobacco leaf of big dragon head height warm area red.

2, only use a thermometer in bottom, behind the complete fixation of the tobacco leaf of bottom, and the tobacco leaf of top is impossible fixation fully, even does not also have complete flavescence.So, following measured temperature just can not adapt to the top with reference to tobacco leaf, the tobacco leaf of simulating property estimation baking top just causes the inaccurate and roasting bad tobacco leaf that heats up usually.

3, close the hole in the ground, skylight tight at 35 ℃-39 ℃, the humiture difference is about 2 ℃, carry out main changing yellow stage, this temperature section is best flavescence temperature concerning flavescence in fact, but at this flavescence temperature section, the moisture of some tobacco leaf the inside is difficult to be evaporated, so be easy to occur that tobacco leaf only turns to be yellow and the phenomenon of not feeling like jelly causes the fixation difficulty, and roasting bad tobacco leaf.

4, the tobacco leaf flavescence reaches 8-9 and becomes the Huang Shicai hole in the ground of putting in a skylight to carry out hydrofuge, close the hole in the ground, skylight because of tobacco leaf tight at main changing yellow stage and carry out flavescence, and close the hole in the ground, skylight tight, the air in the whole barn is forbidden temperature (this interstation is a balance at least) also in a basic balance relatively.So, open hole in the ground, the skylight hydrofuge that heats up this moment, because of the intensification hydrofuge, will strengthen firepower, cause to send out temperature middle dragon in a basic balance originally and the temperature difference of limit dragon just widens, and in low, the low early and high after situation of flash.And just begin to flow because of the air in the whole barn in the hole in the ground of putting in a skylight from forbidding being converted to upwards, march on towards skylight opening, and it can not make progress uniformly and flow, as far as possible can be with warm steam flow from big the scurrying in the localities in space between uncommon position and leaf, and, along with widening of hole in the ground, skylight, at this moment this situation, just formed serious high low-temperature space polarization also along with adding tool in the whole barn, middle flash is low, high down low, and, produce a kind of vicious circle, the position that temperature is high more, the tobacco leaf dehydration is just fast more, contraction is just strong more, and the space is just big more between leaf, is with warm steam flow just to scurry on here more, otherwise, the position tobacco leaf dehydration that temperature is low more is slow more, and contraction is just few more, progressively forms to fall warm situation, even become the dead angle of temperature when serious, according to above this situation, just cause the tobacco leaf of basic flavescence simultaneously, can not get fixation simultaneously, the tobacco leaf of the low-temperature space that causes because of hydrofuge can not get fixation and roasting very easily bad for a long time.As programming rate is accelerated, blue or green cigarette just appears in that high-temperature region easily, and perhaps the dust cigarette forms the situation of attending to one thing and lose sight of another, objective one of key factor of local roasting bad tobacco leaf that Here it is.

5, the middle part blade is moderate owing to containing moisture, resistance is stronger in bake process, programming rate is pulled on and is shut down, and holds each critical point of other link, also can bake the tobacco leaf of full stove Huang substantially, but contain the big bottom leaf of moisture and contain the less upper tobacco leaf of moisture, and the dress cigarette is too many, and under the too close situation, the tobacco leaf that bake full stove Huang is very rare, in reality was produced, it was very usual thing that the tobacco grower bakes the whole stove of top and the bottom tobacco leaf bad.

The consistent wet baking of flue-cured tobacco that the present invention is alleged

1, put the position of thermometer: it can directly measure accurately corresponding with reference to tobacco leaf must temperature, also can changing yellow stage and drying muscle stage in hand temperature avoid the roasting red cigarette of roasting blue or green cigarette to high-temperature.

2, in the whole bake process, with reference to tobacco leaf specific direct reference temperature(TR) is arranged all accordingly, do not do to estimate to heat up.

3, at base frame when flavescence reaches 3-4 and becomes with reference to tobacco leaf, the hydrofuge that just heats up slowly, and the size of basic fixed hydrofuge window, simultaneously also with regard to basic fixed the high low-temperature space in the barn, the tobacco leaf that makes each warm area can be stablized the intensification that continues in whole bake process.Can not produce again because of hole in the ground, switch skylight repeatedly, and cause the serious variation of high low-temperature space in the whole barn.

4, tobacco leaf is felt like jelly in flavescence accordingly, and flavescence is felt like jelly and carried out synchronously, and the tobacco leaf in the whole barn forms yellow first fixation earlier, and yellow back, back fixation is not given the condition of tobacco leaf blackening.

The concrete rules of coherent flue-curing system moisture-removing method are as follows:

The tobacco leaf of gathering and, according to the position, pole is compiled in the maturity classification, and barn is gone in queuing.Last blue or green yellow down, last close rare down principle dress cigarette is gone into barn, and tobacco leaf must calculate according to adorning tobacco leaf pole number before going into barn, and dress is spared as far as possible, fills, if the tobacco leaf of gathering is very little, the cigarette pole number that adorn is few, preferably as calculated after, make whole sky of base frame.Dress is even according to plan in several of tops.

Under the normal condition every next subtract two poles, if the tobacco leaf of gathering just over corresponding saturation, during the dress cigarette every next reduce by four poles, make tobacco leaf in bake process, can allow temperature more uniformly by the platform rising as far as possible.

Tobacco leaf is packed into behind the barn, the special-purpose wet-and-dry-bulb thermometer of a flue-cured tobacco is placed base frame high-temperature region temperature lofty perch.And whole thermometer must be exposed to below the cigarette point of tobacco leaf, can not allow any position of thermometer ensconce the inside of tobacco leaf, the bottom of thermometer can not be contacted imperial face, is advisable from cigarette point 7cm in the top of general thermometer.

Get a thermometer again and place top platform center louver mouth, do the later stage standby (also supplying the reference in early stage).

Close the hole in the ground, skylight tight, temperature with the base frame high-temperature region in 5 hours is raised to 38 ℃, relative humidity can not be lower than 36 ℃, if be lower than 35 ℃, necessarily add a cover straw mat watering humidification with imperial face, temperature is under 38 ℃ condition, Deng the flavescence situation of observing tobacco leaf at any time after 10-15 hour, the object of observation be fixed on without exception the thermometer of putting directly over one the band the base frame tobacco leaf as reference tobacco leaf (being designated hereinafter simply as) with reference to tobacco leaf, when observing, be certain about the humidity of thermometer after must opening the door rapidly at every turn, the back temperature descends in order to avoid open the door, cause measured humiture inaccurate, accomplish to see earlier humiture, see the flavescence degree of tobacco leaf again.

(as: the bright leaf of 80cm, the above flavescence of blade tip reached 24 * 32cm) when 3-4 became when the flavescence of reference tobacco leaf reaches.The hydrofuge that will slowly heat up, the operation in the hole in the ground of putting in a skylight (if the base frame dress is overdone tobacco leaf, base frame reaches 3-4 with reference to the tobacco leaf jaundice of tobacco leaf and becomes yellow, and tobacco leaf one is gone into barn, the work in the hole in the ground of will putting in a skylight).The size in the hole in the ground of putting in a skylight is controlled and is grasped and grasp according to the type of tobacco leaf maturity, position and tobacco leaf flavescence speed speed by the size that what and the whole stove tobacco leaf of putting in order the stove tobacco leaf contain moisture.That is: the dress cigarette is many, and it is big to contain moisture, and maturity is high, low wide open big ground, skylight in position with the fireballing type of tobacco leaf flavescence, otherwise, just the skylight wide open littler.Because the size in the hole in the ground, skylight that opened this moment is made basic fixed.Do not have the big special big change of not doing, purpose is the fixing interior high low-temperature space of barn as far as possible.

The big I in hole in the ground of generally putting in a skylight is toasted in the bake process of a stove tobacco leaf routinely, in about 40% of the hole in the ground maximum that puts in a skylight of big hydrofuge phase, as: 5 tobacco flue-curing houses of 233cm * 233cm, 5 the * (skylight opening of 17cm * 17cm) is arranged, 2 * (the hole, ground (air intake hole) of 12cm * 24cm), if the hole in the ground, skylight of being opened during maximum hydrofuge in routine baking is a standard-sized sheet, the amount that consistent hydrofuge baking is opened is exactly: the skylight open 5 * (17cm * 6.8cm), wide open 2 of ground * (12cm * 9.6cm).

After performing hydrofuge, temperature progressively is raised between 40 ℃-42 ℃, and fire can not burn too much, and (programming rate is per hour about half degree) the humiture difference is about 2 ℃-3 ℃, and at this moment, it is warm and humid poor that key will be noted observing.If warm and humid difference, illustrates the moistureproof window of being opened less than 2 ℃ and makes a slip of the tongue for a short time, must strengthen a bit a little, if warm and humid difference is greater than 3 ℃, illustrate that the moistureproof window of being opened makes a slip of the tongue greatly, must dwindle a little a bit that temperature is no more than 42 ℃ as far as possible, before the tobacco leaf flavescence was no more than 5 one-tenth, it was warm and humid poor to regulate, fixedly the hydrofuge window.

And every observation once, should be certain about the situation of change that humiture is observed tobacco leaf more immediately after opening the door, and observes to finish and withdraw from barn behind the door, close the barn door immediately tight, and the sealing measure that does the best possible, and forbids at door and window air intake or leakage vapour.

When base frame surpassed fifty percent with reference to the tobacco leaf flavescence, temperature can progressively surpass 42 ℃, and after temperature surpassed 42 ℃, when entering 43 ℃, 44 ℃, humidity will remain at about 38 ℃-39 ℃.Regulating this humidity, mainly is to transfer sun with the speed of intensification degree, when programming rate can not be in conjunction with the flavescence degree, can do the change of hydrofuge window slightly, but can not open greatly, the operation of high point because operation can cause the serious variation of the temperature difference between each warm area in the barn simultaneously like this.

At 43 ℃-45 ℃ temperature section, when allowing with reference to tobacco leaf flavescence reach 7-8 to become yellow, temperature can progressively rise to 46 ℃-47 ℃, continues flavescence and reaches 8-9 and become yellow, and temperature rises to 48 ℃-49 ℃.Yellow entirely when tobacco leaf mesophyll, when having only the cigarette muscle not have flavescence, temperature can rise to 50 ℃-51 ℃.As long as have the blue veins phenomenon of (comprising main muscle) at this temperature section in reference to tobacco leaf, temperature can not be above 52 ℃.Because, this moment, the intensity of variation with reference to tobacco leaf should be to collude sharp reel, ratio in the full wafer tobacco leaf, should be about 80% fixations, have only the part cigarette meat of blade upper half part master muscle both sides not have complete fixation, if main muscle do not have complete flavescence just temperature above 52 ℃, just the mesophyll of main muscle both sides might be added dried fixation, cause the rapid moisture that absorbs in the main muscle of cured leaf of main muscle both sides, make the too early dehydration of main muscle, cause the appearance of blue veins pornographic movie.

More than the key technology of this period require point:

The big or small basic fixed of hydrofuge window, fixing mode is: programming rate and flavescence speed adapt, and can be in conjunction with corresponding humidity (38 ℃-39 ℃).Do not change the hydrofuge window significantly, also unnecessary.And be fixed on a band more than the thermometer without exception with reference to tobacco leaf, not to see integral level, no matter the tobacco leaf of low-temperature space yet.Yellow entirely when the offshoot of reference tobacco leaf and master pulse, temperature can surpass 52 ℃, enter 53 ℃-55 ℃, and programming rate is by per hour heating up 1 ℃ speed.Relative humidity can be at 39 ℃-40 ℃.Can be above 55 ℃ at this temperature section handle with reference to the whole fixation dryings of tobacco leaf.When base frame with reference to tobacco leaf after the complete fixation drying, can be above 55 ℃.

The tobacco leaf of top platform and other low-temperature space does not also have the fixation drying so, at this moment.Even also do not have complete flavescence, and just can only turn to the tobacco leaf of top platform center louver mouth to make reference object with reference to tobacco leaf, simultaneously, reference temperature(TR) also can only be done reference temperature(TR) to the thermometer that places top platform center louver mouth.At this moment, the tobacco leaf flavescence of general top platform skylight opening is big to becoming yellow at 8-9, and temperature is probably at 48 ℃-49 ℃, and in a word, the tobacco leaf flavescence here is that the height with temperature line is closely connected.Because base frame is when flavescence reaches 3-4 and becomes with reference to tobacco leaf, just the hydrofuge window basic fixed that will open, the high low-temperature space in the while barn also just finalizes the design almost.That is: high-temperature region continuous high temperature always, low-temperature space relatively-high temperature district also is a consecutive low temperature always.So, according to known law, under corresponding humidity, corresponding temperature is high more at changing yellow stage for tobacco leaf, and flavescence is just fast more.Otherwise temperature is low more, and flavescence is just slow more.So, skylight opening is that middle warm area tobacco leaf intensity of variation necessarily is lower than the high-temperature region substantially.

When the flavescence with reference to tobacco leaf of top platform reached 9-10 one-tenth, temperature can reach 50 ℃, and relative humidity is at 39 ℃-40 ℃.At this temperature section, all must not be with reference to tobacco leaf and the infull Huang of muscle arteries and veins above 50 ℃.Muscle arteries and veins with reference to leaf is yellow entirely, just can be above 50 ℃.And rise to 54 ℃ slowly until the whole fixation dryings of tobacco leaf.At this moment, real fixation stage is finished.Per hour 1 ℃ of progressively rising of temperature, humidity also can raise.The intensification maximum is: the temperature of base frame high-temperature region is no more than 70 ℃ and is advisable.Humidity can be about 43 ℃.For facility heats up and maintenance humidity, progressively shut the hydrofuge window, check before truce whether the cigarette muscle of low-temperature space is absolutely dry, temperature must not be lower than 66 ℃ before the cigarette muscle is absolutely dry.

When though known conventional baking contains the bigger tobacco leaf of moisture in baking, also adopt the hole in the ground of putting in a skylight slightly to get rid of the method for excessive moisture at changing yellow stage, it just do of short duration blending do accordingly wet poor.Not basic fixed hydrofuge window, can not reach the effect of high low-temperature space in the basic fixed barn.

As thicker in the baking upper blade, contain that moisture is less, the slow tobacco leaf of flavescence, and the dress cigarette in the hydrofuge that fixes, is made some corresponding emergency measures very little and under rarer condition:

1, the relevant temperature of day part is lower slightly 1 ℃-2 ℃.

2, step back the hydrofuge time (reach as the reference tobacco leaf and remake basic fixed hydrofuge window when 4-5 becomes) a little.

The hole in the ground, skylight of 3, being opened is slightly smaller.

Attached: as in bake process, using the electronic probe thermometer, effect is better, when observing humiture, the observation of just need not opening the door, only when observing tobacco leaf flavescence degree, the observation of opening the door again places the wet probe of doing of electrical thermometer under the tobacco leaf blade tip of base frame high-temperature region about 7cm, places the display of humiture barn to be easy to the place of observing outward.→

Accompanying drawing is coherent flue-curing system moisture-removing method technological operation figure

(humiture is as the criterion with the base frame lofty perch)

Actual programming rate is pressed the tobacco leaf yellowing degree, according to grasping flexibly shown in the upper table. Can not with Time and discuss (flavescence speed is fast heat up also fast, flavescence speed heats up slowly and also wants slow).

Claims

Coherent flue-curing system moisture-removing method is difficult to difficult baking fixation, that contain the bigger lower blade of moisture especially for baking, contains the less and thicker upper leaf top of moisture, and too many, the too close condition of dress cigarette.

Require claim:

1, after this baking is gone into barn to tobacco leaf,, places base frame high-temperature region temperature lofty perch (below the cigarette point 7cm of base frame tobacco leaf) the special-purpose wet and dry bulb meter (hereinafter to be referred as " thermometer ") of a baking of flue-cured tobacco.

Reason is: known conventional syllogic baking (being designated hereinafter simply as conventional baking).To place thermometer low Tai Men right side to place two watch windows by the wall limit.The temperature of these two position institute sides, because of closing the baking of hole in the ground, skylight tight, the temperature in the barn roughly is a balance at changing yellow stage.Measured temperature is also representative basically, all is very easy to form low-temperature space but enter these two positions of hydrofuge fixation stage, and the temperature of being grasped is just inaccurate.And the correspondence of being grasped is not concrete with reference to tobacco leaf yet, just simulating property with reference to integral level, therefore be very easy to tobacco leaf roasting bad.

The invention is characterized in:

After tobacco leaf gone into barn, the special-purpose wet-and-dry-bulb thermometer of a baking of flue-cured tobacco is placed base frame high-temperature region temperature lofty perch.Because of this position all will continue to keep the relatively-high temperature phenomenon in whole bake process, can not become low-temperature space because of widening of hole in the ground, skylight.The temperature of being grasped all is conforming, and relatively accurately.Being fixed on the tobacco leaf (being the tobacco leaf of base frame high-temperature region, thermometer top one band) of putting thermometer and being right after with reference to tobacco leaf accordingly, make the measured temperature of thermometer and be closely connected together with reference to tobacco leaf accordingly, form the specific correspondence of corresponding temperature with reference to tobacco leaf.
2, when the base frame high-temperature region with reference to tobacco leaf behind the complete fixation, temperature is got another thermometer and is placed platform center, top windowing after surpassing 55 ℃, main reference temperature(TR) turns to the temperature of skylight opening, simultaneously relatively with reference to the tobacco leaf also tobacco leaf of turning center skylight opening.

Its reason is, conventional baking is only used a thermometer, places base frame or two.Behind the complete fixation of the tobacco leaf of bottom, the tobacco leaf of top does not also have complete fixation so, even does not also have complete flavescence, so, the temperature that the following thermometer of being put is surveyed just can not adapt to top tobacco leaf institute must temperature, generally just only make the tobacco leaf that several of tops are toasted in the estimation of simulating property.There is not corresponding reference temperature(TR) to bake bad tobacco leaf because of correspondence with reference to tobacco leaf.

Characteristics of the present invention are:

When the base frame high-temperature region with reference to tobacco leaf behind the complete fixation, the tobacco leaf that the top is several does not also have complete fixation, even does not also have complete flavescence, so, the measured temperature of base frame does not just adapt to the tobacco leaf of several of tops.Just only getting the another thermometer places top platform skylight opening.Turn to skylight opening reference temperature(TR) and with reference to tobacco leaf, because of the measured temperature of skylight opening can adapt to fully skylight opening with reference to tobacco leaf, making corresponding has had concrete corresponding reference temperature(TR) with reference to tobacco leaf.
3, changing yellow stage is high slightly with temperature accidentally, and these two position temperature senses are slower, the tobacco leaf that causes low platform high-temperature region that is very easy to error property is roasting blue or green, and belong to low-temperature space in these two positions of drying muscle stage, and the humiture temperature difference of these two humitures grasped and high-temperature region is bigger, and is easily that the tobacco leaf of base frame high-temperature region is roasting red.

Characteristics of the present invention are:

Changing yellow stage is the temperature lofty perch in hand, and the temperature of commanding elevation is controlled in strictness, stops the roasting green grass or young crops of the tobacco leaf of base frame high-temperature region, and drying muscle stage is the temperature lofty perch in hand, is strict with the preparing high-temp degree, prevents the tobacco leaf of base frame high-temperature region roasting red.
4, after this baking is gone into stove with tobacco leaf, with the special-purpose psychrometer of a baking of flue-cured tobacco, place the temperature lofty perch of base frame high-temperature region, and close the hole in the ground, skylight tight, about 5 hours, the temperature of the thermometer that places base frame is risen to 38 ℃, relative humidity must not be lower than 36 ℃ (must tap adding a cover the straw mat humidification of sprinkling water if be lower than 35 ℃), temperature under 38 ℃ condition, after 10 hours, observe at any time thermometer top one band with reference to tobacco leaf.When the flavescence of reference tobacco leaf reaches 3-4 one-tenth, (the bright leaf flavescence as 80cm reaches 24cm-32cm).Just do the operation of hydrofuge, and first flame enrichment liter is wet, when equitemperature is on the rise, the hole in the ground of windowing again.Its reason is: after conventional baking is gone into stove with tobacco leaf, close the hole in the ground, skylight tight, temperature is risen to about 36 ℃-39 ℃, relative humidity is lower than 2 ℃-3 ℃, make best changing yellow stage, and this changing yellow stage is extended to the tobacco leaf flavescence reach 8-9 and become the yellow hole in the ground of just putting in a skylight, the operation of the hydrofuge that heats up.In fact, close the hole in the ground, skylight tight, (just under the situation that the air in the barn keeps forbidding substantially) temperature is best 36 ℃-39 ℃ temperature section flavescence, but be difficult to the moisture in some tobacco leaf normally is evaporated, and this temperature section is bigger at whole changing yellow stage proportion, is easy to cause tobacco leaf only to turn to be yellow, the phenomenon of not feeling like jelly, cause the fixation difficulty, and roasting bad tobacco leaf.

Characteristics of the present invention are, the tobacco leaf flavescence reaches 3-4 and becomes the Huang hydrofuge work that just heats up, and disposable fixedly hydrofuge window, makes tobacco leaf just begin to discharge moisture in main flavescence process, causes tobacco leaf also feeling like jelly in flavescence, helps the tobacco leaf fixation.

Its reason also has, conventional baking reaches the tobacco leaf flavescence at 8-9 and becomes the yellow hole in the ground of just putting in a skylight, the hydrofuge that heats up, and progressively strengthen the hydrofuge window, because, changing yellow stage is when closing the hole in the ground, skylight tight, the humiture of whole barn is a balance roughly, knows on business that the corresponding flavescence temperature of law is high more, and flavescence is just fast more, otherwise flavescence is just slow.Therefore, under the equal temperature conditions, the tobacco leaf flavescence is also with regard to basically identical, and when the tobacco leaf flavescence reaches 8-9 and becomes yellow, just begins to open the hole in the ground, skylight and carry out hydrofuge, just form the strong differentiation of high low-temperature space in the whole barn, and along with the progressively increasing in hole in the ground, skylight, this situation is just stronger, causes the tobacco leaf of changing yellow stage flavescence simultaneously, can not get fixation simultaneously at fixation stage, and roasting bad tobacco leaf.

Characteristics of the present invention just are: when the flavescence of reference tobacco leaf reaches 3-4 one-tenth Huang, just carry out medium-sized slowly intensification hydrofuge, and basic fixed hydrofuge window, the high low-temperature space environment that the temperature difference is less is created in typing in barn as early as possible, makes the tobacco leaf flavescence as early as possible of low-temperature space.The high low-temperature space of having the more important thing is in whole barn basic fixed, fixation stage just forms the flavescence of high-temperature region elder generation with regard to first fixation, flavescence back fixation just behind the low-temperature space, and formed yellow limit, limit fixation, flavescence finishes fixation and also finishes substantially, has relatively just shortened stoving time.And stopped some position and baked bad phenomenon because of hydrofuge causes the early yellow fixation late of low-temperature space.