CN101450495A - Eucalypt artificial wood drying method - Google Patents
Eucalypt artificial wood drying method Download PDFInfo
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- CN101450495A CN101450495A CNA2008102398465A CN200810239846A CN101450495A CN 101450495 A CN101450495 A CN 101450495A CN A2008102398465 A CNA2008102398465 A CN A2008102398465A CN 200810239846 A CN200810239846 A CN 200810239846A CN 101450495 A CN101450495 A CN 101450495A
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Abstract
The invention belongs to a timber drying method for eucalyptus planted forests. The method comprises the following steps: selecting materials; measuring initial moisture content, in which, sawtimbers are detected to obtain moisture contents and the sawtimbers of different moisture contents are respectively dried; stacking, in which, reasonable circulation of airflow inside a kiln is ensured and the capacity of the kiln is fully utilized to prevent timber warping and end checking; placing a moisture content check plate inside the kiln, in which, the moisture content check plate of dried timber inside the same kiln is determined according to requirements to check the moisture content of the check plate; and controlling the temperature and humidity inside the kiln according to the drying standards of different eucalyptus species. The timber drying method has the advantages of preventing eucalypti from crimpling in the process of drying and ensuring drying quality of eucalypti.
Description
Technical field
The invention belongs to eucalyptus drying of wood technical field.
Background technology
Eucalyptus is Australian indigenous tree, and kind reaches kind more than 800, and growth is rapid, and adaptability is strong, and the timber yield height is big with interzone wood property difference between kind.By the world many countries introducing and planting, global eucalyptus plantation cultivated area reached 5,000 ten thousand hectares in recent years.
After the founding of the state, China has introduced a fine variety eucalyptus in south, and the eucalyptus plantation area reaches 1,500,000 hectares at present.Quick growth along with global economy, timber resources in short supply day by day, various countries are all adjusting Forest Industry Policies, and the eucalyptus forest material production that majority state will pass by only to be used for pulp production partly turns to solid wood processing, with the added value of raising timber, thereby pursue higher profit.For this reason, domestic and international many timber processings and scientific research department research and the eucalyptus solid wood of all extensively having carried out eucalyptus solid wood character and process and utilization technology utilizes Products Development production.States such as Australia, South Africa and Brazil take the lead in having obtained multinomial eucalyptus solid wood processing practical technique.
In research eucalyptus wood processing technique and production process, the dry technology that generally believes eucalyptus timber is the key of Eucalyptus processing and utilization, also becomes the most difficult technology of capturing simultaneously.Often find the eucalyptus collapse of Wood in the eucalyptus dry run, had a strong impact on the quality of eucalyptus timber.
Summary of the invention
The purpose of this invention is to provide a kind of eucalyptus plantation method for drying wood, the main advantage of this method is a shrinkage phenomenon of having avoided eucalyptus to produce in dry run, guarantees the quality of eucalyptus drying.
Method of the present invention comprises the steps:
(1) selection, the sawn timber of different seeds eucalyptus and thickness should be distinguished drying, during timber lazy weight one kiln, allows the seeds that the similar and first moisture content of drying property is close dry with kiln drying;
(2) measure moisture content just, detect sawn timber and draw moisture content, the sawn timber of different water cut rate should be distinguished drying;
(3) stacking should guarantee that airstream in kiln rationally circulates, and makes full use of the capacity of kiln, prevents warp in wood and end check;
(4) place moisture content sample board in kiln, determine as requested and need check its moisture content with the moisture content sample board of the dry timber of kiln drying, moisture content calculates according to trying down:
In the formula: W---test piece moisture content, %; G
c---test piece initial weight, g; G
g---test piece absolute dry weight, g;
(5) according to the temperature and humidity in the different seeds eucalyptus drying schedule control kilns, according to the temperature and humidity in the drying schedule control dry kiln, described different seeds eucalyptus drying schedules comprise the drying schedule of lemon scented gum, gallery edge eucalyptus drying schedule,
The eucalyptus drying schedule, the dry benchmark of tail alpine ash trunk, Dunne's Eucalyptus material reference data, tail circle eucalyptus, big inflorescence eucalyptus 25mm drying schedule, tail circle eucalyptus, the dried dried combined drying benchmark in chamber of big inflorescence eucalyptus gas and tail circle eucalyptus, big inflorescence eucalyptus 50mm drying schedule.
Advantage of the present invention is: should method is simple, and the shrinkage phenomenon of having avoided eucalyptus to produce in dry run has guaranteed the quality of eucalyptus drying.
The specific embodiment
Embodiment 1:
(1) selection, the sawn timber of different seeds eucalyptus and thickness should be distinguished drying, during timber lazy weight one kiln, allows the seeds that the similar and first moisture content of drying property is close dry with kiln drying;
(2) measure moisture content just, detect sawn timber and draw moisture content, the sawn timber of different water cut rate should be distinguished drying;
(3) stacking should guarantee that airstream in kiln rationally circulates, and makes full use of the capacity of kiln, prevents warp in wood and end check.Material heap length should meet the dry kiln design code, during timber lazy weight one kiln, allows to reduce material heap width, but stable should guarantee the material stack operation time.To forced draught kiln, the side of layers of material should be close to, and to natural circulation kiln, should reserve suitable uptake ventilator.Treating selvedge sawn timber material heap side should be concordant, and unedged sawn timber material heap side should be concordant as far as possible, and material heap end should make one to hold level with both hands together at least.Filler strip (parting bead) should adopt the high seasoned wood of hardness to make.The filler strip spacing:, material long by seeds, material is thick determines that be generally 0.3～0.4m, thin material should be smaller, and thick material can be greatly.The filler strip cross dimensions: generally get 25mm * 30mm～25mm * 40mm, S4S, thickness deviation is
Material heap each layer filler strip up and down should remain on the same vertical line.Material is piled each layer filler strip thickness should be consistent.Material heap end filler strip should be piled concordant with material.Material heap top should add ballast or adopt hold down gag, prevents the top material warp.
(4) place moisture content sample board in kiln, determine as requested and need check its moisture content with the moisture content sample board of the dry timber of kiln drying, moisture content calculates according to trying down:
In the formula: W---test piece moisture content, %; G
c---test piece initial weight, g; G
g---test piece absolute dry weight, g.
The moisture content of inspection panel and drying property reply are representative by dried sawn timber.The inspection panel size: length 0.8～1.2m, generally get 1m, thickness is with identical by dried sawn timber, and width approximates by the mean breadth of dried sawn timber.Inspection panel is not less than the 0.3m place in distance sawn timber end and chooses, and should not have bark, rotten, big defectives such as knot, crackle, medulla and reaction wood.Inspection panel is generally got 4, is divided into 2 of the higher plain-sawed lumbers of moisture content, 1 of quarter-sawed lumber, 1 of the lower plain-sawed lumber of moisture content.2 plain-sawed lumbers that moisture content is higher are generally chosen by heartwood or mid portion, and the wide coniferous wood of sapwood is chosen from sapwood, are placed on other positions of being convenient to take out in dry slow position of material heap or the material heap, as the moisture content standard of regulating drying schedule.The higher quarter-sawed lumber of plain-sawed lumber that moisture content is lower and moisture content is placed on other positions of being convenient to take out in dry very fast and slow position of material heap or the material heap respectively, as the moisture content foundation of end of a period Balance Treatment.
The mensuration of first moisture content and absolute dry weight:
When saw is got inspection panel, each saw is got the moisture content section that thickness is 10～12mm at its two ends, the foreign material that removing is adhered to, weigh with the balance of precision 0.01g immediately, then, put in the baking oven, baking is to absolutely dry (behind about 10h under 103 ± 2 ℃ of temperature, every 2h weighs once, to last twice weight difference when being no more than 0.02g, think reach absolutely dry).Calculate its moisture content by formula (1).
In the formula: W---test piece moisture content, %;
G
c---test piece initial weight, g;
G
g---test piece absolute dry weight, g.
The first moisture content of inspection panel is got the mean value of two test piece moisture content.
After under the check bladed saw, be coated with the end-blocking face, weigh with water-repellent paint immediately, put into material heap reserved empty position then.If the material heap does not pile as yet, available plastic film wrapped is put indoor temporarily.
The inspection panel absolute dry weight is calculated by formula (2):
In the formula: G
gAnd G---inspection panel absolute dry weight and initial weight, g;
W---inspection panel is moisture content just, %.
The moisture content of inspection panel in dry run calculates by formula (3):
In the formula: W---inspection panel actual moisture content, %;
G
g---inspection panel is weight at that time, g.
When adopting the moisture content in the resistance-type moisture content meter detection dry run, should proofread and correct instrument.The electrode insertion depth should be suitable, and insertion depth is 21% place (apart from the sawn timber surface) of sheet metal thickness when measuring average moisture content, and insertion depth is by formula (4 calculate).Inspection panel just moisture content is fixed with reference to 5.5.1 rules and regulations location survey, can calculate by formula (2).
D＝0.21S…………………………………………(4)
In the formula: D---insert the degree of depth of sawn timber, mm
S---sawn timber thickness, mm
(5) according to the temperature and humidity in the different seeds eucalyptus drying schedule control kilns, according to the temperature and humidity in the drying schedule control dry kiln.
The interior equipment (comprising ventilation blower, hygrometer etc.) of reply kiln is checked before the loading of kiln, confirms that it could loading of kiln after intact.The heater valve should be opened gradually, prevents condensate water bump heater.The first few minutes planted agent that heater starts gets rid of heater and ducted rust dirt by the bypass pipe of steam trap.In the dry run in the kiln actual temperature should not surpass setting ± 2 ℃, wet-bulb depression is no more than setting ± 1 ℃.Regularly the weighing inspection panel guarantees in time to adjust benchmark, and checks seasoning defect drying defect, pinpoints the problems, and should in time handle.Often observe the wet and dry bulb situation of change, the water level in the water box must be higher than 1/2 box height.In time fill in dry record.Temperature, humidity detection instrument should regularly be proofreaied and correct.In the dry run in the kiln actual temperature should not surpass setting ± 2 ℃, wet-bulb depression.After dry run finished, treating that kiln temperature drops to can kiln discharge when not being higher than 30 ℃ of atmospheric temperatures.Cold district winter can be when kiln temperature be lower than 30 ℃ kiln discharge.
The lemon scented gum drying schedule comprises:
(1) sawn timber The pre-heat treatment keeps in the kiln 55 ℃ of dry-bulb temperatures, in 54.5～55 ℃ of the wet-bulb temperature, keeps 3h;
(2) the 30% moisture content stage of sawn timber keeps 70 ℃ of the interior dry-bulb temperatures of kiln, and 69 ℃ of wet-bulb temperature are kept 2h;
(3) the 20% moisture content stage of sawn timber keeps 75 ℃ of the interior dry-bulb temperatures of kiln, 73 ℃ of wet-bulb temperature, and intermediate treatment 2～3 times is kept 3h at every turn;
(4) 8～10% moisture content stages of sawn timber, the processing that ends keeps 85 ℃ of the interior dry-bulb temperatures of kiln, 79 ℃ of wet-bulb temperature, and shrinkage is replied and is handled 3h, keeps 5h.Specifically be expressed as follows:
The lemon scented gum drying schedule
Described in the table: " reach setting value back ", be meant reach one's own profession indication dry-bulb temperature and wet-bulb temperature value after.Intermediate treatment is for spray into steam, " intermediate treatment 2-3 time is kept 3h " at every turn in kiln, be meant: in kiln, spray into steam after 2～3 hours, stop to spray into steam, keep 3h for once under the state that keeps one's own profession indication dry-bulb temperature and wet-bulb temperature value, above-mentioned steps is 2～3 times repeatedly.Shrinkage is replied to be treated to and spray into steam in kiln, " shrinkage is replied and handled 3h, keeps 5h " is meant: spray into steam after 2～3 hours in kiln, stop to spray into steam, keep 5h for once under the state that keeps one's own profession indication dry-bulb temperature and wet-bulb temperature value, above-mentioned steps is 2～3 times repeatedly.The pre-heat treatment can be used existing water spray and spraying steam United Technologies.
Embodiment 2:
Drying schedule as different from Example 1, all the other are identical, so be not repeated.
Gallery edge eucalyptus drying schedule comprises:
(1) sawn timber The pre-heat treatment keeps in the kiln 50 ℃ of dry-bulb temperatures, in 49.5～50 ℃ of the wet-bulb temperature, keeps 3h;
(2) the 30% moisture content stage of sawn timber keeps 60 ℃ of the interior dry-bulb temperatures of kiln, and 59 ℃ of wet-bulb temperature are kept 3h;
(3) the 20% moisture content stage of sawn timber keeps 70 ℃ of the interior dry-bulb temperatures of kiln, 68 ℃ of wet-bulb temperature, and intermediate treatment 2～3 times is kept 3h at every turn;
(4) 8～10% moisture content stages of sawn timber, the processing that ends keeps 80 ℃ of the interior dry-bulb temperatures of kiln, 74 ℃ of wet-bulb temperature, and shrinkage is replied and is handled 3h, keeps 5h.
Specifically be expressed as follows:
Gallery edge eucalyptus drying schedule
Embodiment 3:
Drying schedule as different from Example 1, all the other are identical, so be not repeated.
The dry benchmark of alpine ash trunk comprises:
(1) sawn timber The pre-heat treatment keeps in the kiln 55 ℃ of dry-bulb temperatures, in 54～55 ℃ of the wet-bulb temperature, keeps 3h;
(2) the 30% moisture content stage of sawn timber keeps 68 ℃ of the interior dry-bulb temperatures of kiln, and 67 ℃ of wet-bulb temperature are kept 3h;
(3) the 20% moisture content stage of sawn timber keeps 65 ℃ of the interior dry-bulb temperatures of kiln, 63 ℃ of wet-bulb temperature, and intermediate treatment 2～3 times is kept 3h at every turn;
(4) 8～10% moisture content stages of sawn timber, the processing that ends keeps 75 ℃ of the interior dry-bulb temperatures of kiln, 69 ℃ of wet-bulb temperature, and shrinkage is replied and is handled 3h, keeps 5h.
Specifically be expressed as follows:
The dry benchmark of alpine ash trunk
Embodiment 4:
Drying schedule as different from Example 1, all the other are identical, so be not repeated.
The dry benchmark of tail alpine ash trunk comprises:
(1) sawn timber The pre-heat treatment keeps in the kiln 50 ℃ of dry-bulb temperatures, in 49～50 ℃ of the wet-bulb temperature, keeps 3h;
(2) the 30% moisture content stage of sawn timber keeps 55 ℃ of the interior dry-bulb temperatures of kiln, and 54 ℃ of wet-bulb temperature are kept 3h;
(3) the 20% moisture content stage of sawn timber keeps 65 ℃ of the interior dry-bulb temperatures of kiln, 63 ℃ of wet-bulb temperature, and intermediate treatment 2～3 times is kept 3h at every turn;
(4) 8～10% moisture content stages of sawn timber, the processing that ends keeps 75 ℃ of the interior dry-bulb temperatures of kiln, 69 ℃ of wet-bulb temperature, and shrinkage is replied and is handled 3h, keeps 5h.
Specifically be expressed as follows:
The dry benchmark of tail alpine ash trunk
Embodiment 5:
Drying schedule as different from Example 1, all the other are identical, so be not repeated.
Tail circle eucalyptus, big inflorescence eucalyptus 25mm drying schedule comprise:
(1) sawn timber The pre-heat treatment keeps in the kiln 55 ℃ of dry-bulb temperatures, in 50～55 ℃ of the wet-bulb temperature, keeps 3h;
(2) the 30% moisture content stage of sawn timber keeps 60 ℃ of the interior dry-bulb temperatures of kiln, and 59 ℃ of wet-bulb temperature are kept 3h;
(3) the 20% moisture content stage of sawn timber keeps 70 ℃ of the interior dry-bulb temperatures of kiln, 68 ℃ of wet-bulb temperature, and intermediate treatment is kept 3h 2～3 times at every turn;
(4) 8～10% moisture content stages of sawn timber, the processing that ends keeps 80 ℃ of the interior dry-bulb temperatures of kiln, 74 ℃ of wet-bulb temperature, and shrinkage is replied and is handled 3h, keeps 4h.
Specifically be expressed as follows:
Tail circle eucalyptus, big inflorescence eucalyptus 25mm drying schedule
Embodiment 6:
Drying schedule as different from Example 1, all the other are identical, so be not repeated.
Tail circle eucalyptus, big inflorescence eucalyptus gas are done the dried combined drying benchmark in chamber and are comprised:
(1) in the 30% above moisture content stage of sawn timber, keeping away sun, under the rainproof state, air dry;
(2) the 30% moisture content stage of sawn timber keeps 55 ℃ of the interior dry-bulb temperatures of kiln, 52 ℃ of wet-bulb temperature, and steam treatment 2h keeps 3h;
(3) the 20% moisture content stage of sawn timber keeps 70 ℃ of the interior dry-bulb temperatures of kiln, 68 ℃ of wet-bulb temperature, and intermediate treatment 2～3 times is kept 3h at every turn;
(4) 8～10% moisture content stages of sawn timber, the processing that ends keeps 80 ℃ of the interior dry-bulb temperatures of kiln, 74 ℃ of wet-bulb temperature, and shrinkage is replied and is handled 3h, keeps 4h.
Specifically be expressed as follows:
Tail circle eucalyptus, big inflorescence eucalyptus gas are done the dried combined drying benchmark in chamber
Embodiment 7:
Drying schedule as different from Example 1, all the other are identical, so be not repeated.
Tail circle eucalyptus, big inflorescence eucalyptus 50mm drying schedule comprise:
(1) sawn timber The pre-heat treatment keeps in the kiln 50 ℃ of dry-bulb temperatures, in 48～50 ℃ of the wet-bulb temperature, keeps 4h;
(2) the 30% moisture content stage of sawn timber keeps 60 ℃ of the interior dry-bulb temperatures of kiln, and 59 ℃ of wet-bulb temperature are kept 3h;
(3) the 20% moisture content stage of sawn timber keeps 70 ℃ of the interior dry-bulb temperatures of kiln, 68 ℃ of wet-bulb temperature, and intermediate treatment 4～5 times is kept 3h at every turn;
(4) 8～10% moisture content stages of sawn timber, the processing that ends keeps 75 ℃ of the interior dry-bulb temperatures of kiln, 74 ℃ of wet-bulb temperature, and shrinkage is replied and is handled 4～5h, keeps 4h.
Specifically be expressed as follows:
Tail circle eucalyptus, big inflorescence eucalyptus 50mm drying schedule
Embodiment 8:
Drying schedule as different from Example 1, all the other are identical, so be not repeated.
Dunne's Eucalyptus material reference data
ω (%) is a moisture content, t (℃) be kiln temperature.Hard benchmark and soft benchmark are the known standard of processing sawn timber.So be not repeated.
Claims (8)
1, a kind of eucalyptus plantation method for drying wood is characterized in that: comprise the steps:
(1) selection, the sawn timber of different seeds eucalyptus and thickness should be distinguished drying, during timber lazy weight one kiln, allows the seeds that the similar and first moisture content of drying property is close dry with kiln drying;
(2) measure moisture content just, detect sawn timber and draw moisture content, the sawn timber of different water cut rate should be distinguished drying;
(3) stacking should guarantee that airstream in kiln rationally circulates, and makes full use of the capacity of kiln, prevents warp in wood and end check;
(4) place moisture content sample board in kiln, determine as requested and need check its moisture content with the moisture content sample board of the dry timber of kiln drying, moisture content calculates according to trying down:
In the formula: W test piece moisture content, %; G---test piece initial weight, g; G
g---the test piece absolute dry weight, g:
(5) according to the temperature and humidity in the different seeds eucalyptus drying schedule control kilns, according to the temperature and humidity in the drying schedule control dry kiln, described different seeds eucalyptus drying schedule comprises the drying schedule of lemon scented gum, gallery edge eucalyptus drying schedule, the dry benchmark of alpine ash trunk, the dry benchmark of tail alpine ash trunk, Dunne's Eucalyptus material reference data, tail circle eucalyptus, big inflorescence eucalyptus 25mm drying schedule, tail circle eucalyptus, the dried dried combined drying benchmark in chamber of big inflorescence eucalyptus gas and tail circle eucalyptus, big inflorescence eucalyptus 50mm drying schedule.
2, method according to claim 1 is characterized in that: the lemon scented gum drying schedule comprises:
(1) sawn timber The pre-heat treatment keeps in the kiln 55 ℃ of dry-bulb temperatures, in 54.5～55 ℃ of the wet-bulb temperature, keeps 3h;
(2) the 30% moisture content stage of sawn timber keeps 70 ℃ of the interior dry-bulb temperatures of kiln, and 69 ℃ of wet-bulb temperature are kept 2h;
(3) the 20% moisture content stage of sawn timber keeps 75 ℃ of the interior dry-bulb temperatures of kiln, 73 ℃ of wet-bulb temperature, and intermediate treatment 2～3 times is kept 3h at every turn;
(4) 8～10% moisture content stages of sawn timber, the processing that ends keeps 85 ℃ of the interior dry-bulb temperatures of kiln, 79 ℃ of wet-bulb temperature, and shrinkage is replied and is handled 3h, keeps 5h.
3, method according to claim 1 is characterized in that: gallery edge eucalyptus drying schedule comprises:
(1) sawn timber The pre-heat treatment keeps in the kiln 50 ℃ of dry-bulb temperatures, in 49.5～50 ℃ of the wet-bulb temperature, keeps 3h;
(2) the 30% moisture content stage of sawn timber keeps 60 ℃ of the interior dry-bulb temperatures of kiln, and 59 ℃ of wet-bulb temperature are kept 3h;
(3) the 20% moisture content stage of sawn timber keeps 70 ℃ of the interior dry-bulb temperatures of kiln, 68 ℃ of wet-bulb temperature, and intermediate treatment 2～3 times is kept 3h at every turn;
(4) 8～10% moisture content stages of sawn timber, the processing that ends keeps 80 ℃ of the interior dry-bulb temperatures of kiln, 74 ℃ of wet-bulb temperature, and shrinkage is replied and is handled 3h, keeps 5h.
4, method according to claim 1 is characterized in that: the dry benchmark of alpine ash trunk comprises:
(1) sawn timber The pre-heat treatment keeps in the kiln 55 ℃ of dry-bulb temperatures, in 54～55 ℃ of the wet-bulb temperature, keeps 3h;
(2) the 30% moisture content stage of sawn timber keeps 68 ℃ of the interior dry-bulb temperatures of kiln, and 67 ℃ of wet-bulb temperature are kept 3h;
(3) the 20% moisture content stage of sawn timber keeps 65 ℃ of the interior dry-bulb temperatures of kiln, 63 ℃ of wet-bulb temperature, and intermediate treatment 2～3 times is kept 3h at every turn;
(4) 8～10% moisture content stages of sawn timber, the processing that ends keeps 75 ℃ of the interior dry-bulb temperatures of kiln, 69 ℃ of wet-bulb temperature, and shrinkage is replied and is handled 3h, keeps 5h.
5, method according to claim 1 is characterized in that: the dry benchmark of tail alpine ash trunk comprises:
(1) sawn timber The pre-heat treatment keeps in the kiln 50 ℃ of dry-bulb temperatures, in 49～50 ℃ of the wet-bulb temperature, keeps 3h;
(2) the 30% moisture content stage of sawn timber keeps 55 ℃ of the interior dry-bulb temperatures of kiln, and 54 ℃ of wet-bulb temperature are kept 3h;
(3) the 20% moisture content stage of sawn timber keeps 65 ℃ of the interior dry-bulb temperatures of kiln, 63 ℃ of wet-bulb temperature, and intermediate treatment 2～3 times is kept 3h at every turn;
(4) 8～10% moisture content stages of sawn timber, the processing that ends keeps 75 ℃ of the interior dry-bulb temperatures of kiln, 69 ℃ of wet-bulb temperature, and shrinkage is replied and is handled 3h, keeps 5h.
6, method according to claim 1 is characterized in that: tail circle eucalyptus, big inflorescence eucalyptus 25mm drying schedule comprise:
(1) sawn timber The pre-heat treatment keeps in the kiln 55 ℃ of dry-bulb temperatures, in 50～55 ℃ of the wet-bulb temperature, keeps 3h;
(2) the 30% moisture content stage of sawn timber keeps 60 ℃ of the interior dry-bulb temperatures of kiln, and 59 ℃ of wet-bulb temperature are kept 3h;
(3) the 20% moisture content stage of sawn timber keeps 70 ℃ of the interior dry-bulb temperatures of kiln, 68 ℃ of wet-bulb temperature, and intermediate treatment 2～3 times is kept 3h at every turn;
(4) 8～10% moisture content stages of sawn timber, the processing that ends keeps 80 ℃ of the interior dry-bulb temperatures of kiln, 74 ℃ of wet-bulb temperature, and shrinkage is replied and is handled 3h, keeps 4h.
7, method according to claim 1 is characterized in that: tail circle eucalyptus, big inflorescence eucalyptus gas are done the dried combined drying benchmark in chamber and are comprised:
(1) in the 30% above moisture content stage of sawn timber, keeping away sun, under the rainproof state, air dry;
(2) the 30% moisture content stage of sawn timber keeps 55 ℃ of the interior dry-bulb temperatures of kiln, 52 ℃ of wet-bulb temperature, and steam treatment 2h keeps 3h;
(3) the 20% moisture content stage of sawn timber keeps 70 ℃ of the interior dry-bulb temperatures of kiln, 68 ℃ of wet-bulb temperature, and intermediate treatment 2～3 times is kept 3h at every turn;
(4) 8～10% moisture content stages of sawn timber, the processing that ends keeps 80 ℃ of the interior dry-bulb temperatures of kiln, 74 ℃ of wet-bulb temperature, and shrinkage is replied and is handled 3h, keeps 4h.
8, method according to claim 1 is characterized in that: tail circle eucalyptus, big inflorescence eucalyptus 50mm drying schedule comprise:
(1) sawn timber The pre-heat treatment keeps in the kiln 50 ℃ of dry-bulb temperatures, in 48～50 ℃ of the wet-bulb temperature, keeps 4h;
(2) the 30% moisture content stage of sawn timber keeps 60 ℃ of the interior dry-bulb temperatures of kiln, and 59 ℃ of wet-bulb temperature are kept 3h;
(3) the 20% moisture content stage of sawn timber keeps 70 ℃ of the interior dry-bulb temperatures of kiln, 68 ℃ of wet-bulb temperature, and intermediate treatment 4～5 times is kept 3h at every turn;
(4) 8～10% moisture content stages of sawn timber, the processing that ends keeps 75 ℃ of the interior dry-bulb temperatures of kiln, 74 ℃ of wet-bulb temperature, and shrinkage is replied and is handled 4～5h, keeps 4h.
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| CN112378170A (en) * | 2020-10-27 | 2021-02-19 | 北京林业大学 | Small-diameter wood solid wood utilization method |
| CN113843873A (en) * | 2021-09-30 | 2021-12-28 | 中国热带农业科学院橡胶研究所 | Indoor coconut tree wood processing and production method |
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2008
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| CN106078985A (en) * | 2016-07-27 | 2016-11-09 | 阜南县大自然工艺品有限公司 | A kind of drying method of Fructus Jujubae wood |
| CN107655271A (en) * | 2017-10-24 | 2018-02-02 | 桐乡市林达木业有限公司 | A kind of drying of wood processing method |
| CN107877647A (en) * | 2017-11-30 | 2018-04-06 | 闵昭蜀 | A kind of drying means of Eucalyptus Wood |
| CN111805624A (en) * | 2020-07-24 | 2020-10-23 | 寿光市鲁丽木业股份有限公司 | Production process of small-diameter wood integrated material |
| CN112378170A (en) * | 2020-10-27 | 2021-02-19 | 北京林业大学 | Small-diameter wood solid wood utilization method |
| CN113843873A (en) * | 2021-09-30 | 2021-12-28 | 中国热带农业科学院橡胶研究所 | Indoor coconut tree wood processing and production method |
| CN115507624A (en) * | 2022-08-25 | 2022-12-23 | 宜昌金宝乐器制造有限公司 | Mildew-proof energy-saving drying device and method for beech sawn timber for instrument |
| CN115507624B (en) * | 2022-08-25 | 2023-11-07 | 宜昌金宝乐器制造有限公司 | Mildew-proof energy-saving drying device and method for beech sawn timber for musical instrument |
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