CN104964527A - Lumber drying kiln - Google Patents

Lumber drying kiln Download PDF

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Publication number
CN104964527A
CN104964527A CN201510414611.5A CN201510414611A CN104964527A CN 104964527 A CN104964527 A CN 104964527A CN 201510414611 A CN201510414611 A CN 201510414611A CN 104964527 A CN104964527 A CN 104964527A
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China
Prior art keywords
kiln
lumber
drying
air
heater
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CN201510414611.5A
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CN104964527B (en
Inventor
吴天延
沈海霞
熊国军
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YICHANG JINBAO MUSICAL INSTRUMENT MANUFACTURING Co Ltd
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YICHANG JINBAO MUSICAL INSTRUMENT MANUFACTURING Co Ltd
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Priority to CN201510414611.5A priority Critical patent/CN104964527B/en
Publication of CN104964527A publication Critical patent/CN104964527A/en
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Abstract

A lumber drying kiln comprises a kiln body which is provided with a main kiln door. The kiln body is internally provided with at least one set of air feeding device and heating device. A plurality of exhausting devices are arranged in the kiln body. A temperature and humidity detecting device and a moisture content detecting device are arranged in the kiln body. According to the lumber drying kiln, the temperature in the kiln is even by means of the air feeding and heating mode, a steam spraying pipe is matched, the temperature and humidity in the kiln are easy to adjust and control, the energy utilization rate is high, and the energy conservation effect is good; an air speed field, a temperature field and a humidity field are uniform in distribution, and the drying uniformity is good; the drying efficiency is high, and the comprehensive technological economic performance is good. After the lumber drying kiln is adopted, the drying cycle is shortened by 33%, color changing, decaying and worm damage are zero, internal cracking is zero, end cracking and surface cracking is 0.6%, deformation is also greatly relieved, and the internal stress is fully eliminated.

Description

Lumber kiln
Technical field
The present invention relates to drying of wood field, particularly a kind of lumber kiln.
Background technology
The method of the drying of wood is a lot, is usually divided into natural drying and the large class of artificial drying two.Natural drying is that timber is deposited in the booth of spacious place or ventilation, utilizes air to conduct heat, passes humid medium, utilize the heat of solar radiation, Water In Wood is progressively discharged, reach certain degree of drying.Shortcoming is: drying condition such as temperature, relative humidity can not manual controls, drying time is longer, lower moisture content can not be dried to, and floor space is large, the occupation of capital is large, between dry period, timber subjects to the harm of bacterium worm and variable color, rotten and damage by worms occurs, and produces the defects such as cracking, distortion.Artificial drying refers in certain equipment, causes the condition of the applicable drying of wood by artificial method, as temperature, relative humidity, Air flow velocity etc., or makes talent discharge moisture under manual control by other heating, wet down method to obtain drying.Artificial drying can ensure dry mass, shortens drying time, and can meet the dry requirement of various different purposes, even some special requirement.
, performance comprehensive musical instrument complicated for this precise structure of piano, wooden parts will adopt artificial drying, and the common equipment of artificial drying is exactly lumber kiln.Dry kiln mostly is brick structure or reinforced concrete structure, and the dry kiln of metal structure housing have also been obtained extensive use in recent years.But it is higher also to there is cost in dry kiln, the problem of uneven drying.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of lumber kiln, conveniently can regulate the epidemic disaster in kiln, dry mass easily ensures, and rate of drying is fast, again can central heating, in being particularly useful for, the drying of low-density easy bole or the larger operating mode of batch.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of lumber kiln, comprises kiln body, and kiln body is provided with main wicket, is provided with at least one group of air-supply arrangement and heater in kiln body;
Multiple exhaust apparatus is provided with in kiln body;
Temperature-humidity detecting device and detecting device for moisture content is provided with in kiln body.
In kiln body, be provided with dividing plate, air-supply arrangement and heater are positioned at the top of dividing plate.
Described air-supply arrangement and heater are many groups, the air-supply arrangement of many groups and heater interlaced arrangement.
Described heater is resistive heating device or sealed induction heating apparatus.
In described sealed induction heating apparatus, be provided with heat medium in fluid reservoir, fluid reservoir is connected by pipeline circulation, and pipeline is provided with multiple radiating fin, is wound with solenoid outside fluid reservoir.
Also heat-insulation layer is provided with outward at fluid reservoir.
In kiln body, be provided with spraying steam pipe, in kiln body, be provided with dividing plate, spraying steam pipe is positioned at the edge above dividing plate.
Be provided with blower fan in described exhaust apparatus, be the inclined-plane of ventilation in the bottom of exhaust apparatus, blade is hinged on lower side and inclined-plane, above blade, be provided with backing pin, is less than 89 ° after the maximum unlatching of backing pin restriction blade with the angle of horizontal plane.
Also be provided with the first actuating doors at kiln body, the area of the first actuating doors is less than the area of main wicket;
Be provided with operation room outside first actuating doors, be also provided with the second actuating doors at operation room.
The blast pipe of exhaust apparatus, through operation room, the blast pipe in operation room is provided with heat-exchanger rig, is provided with air inlet pipeline at operation room.
A kind of lumber kiln provided by the invention, by the mode of air-supply heating, make the homogeneous temperature in kiln, coordinate spraying steam pipe, the easy regulation and control of the epidemic disaster in kiln, in preferred scheme, the air-supply arrangement of many groups and heater interlaced arrangement in kiln, coordinate the structure of dividing plate, thus the loop direction of hot blast is controlled, homogeneous heating.The sealed induction heating apparatus safety adopted and energy consumption is lower, reduces by 40% ~ 50% compared to existing resistive heating device energy consumption.The exhaust apparatus adopted can discharge the air in kiln fast, to control kiln temperature and humidity, and can realize automatic-sealed during not air draft, and little for the blade windage sealed.The operation room arranged and actuating doors are convenient to Artificial Control, and avoiding opening main wicket affects dry mass.The present invention can be high by capacity usage ratio, good energy-conserving effect; Evenly, uniform drying is good for wind speed field and epidemic disaster field distribution; Drying efficiency is high, and overall economics performance is good.Adopt after the present invention, arid cycle shortens 33%, and variable color, rotten and to damage by worms be 0, and implosion is 0, and it is 0.6% that end check and table split, and distortion also improves comparatively large, and internal stress is eliminated fully.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is Longitudinal cross section schematic of the present invention.
Fig. 2 is cross sectional representation of the present invention.
Fig. 3 is the structural representation of heater in the present invention.
Structural representation when Fig. 4 is the blade closedown of exhaust apparatus in the present invention.
Structural representation when Fig. 5 is the blade unlatching of exhaust apparatus in the present invention.
In figure: kiln body 1, air-supply arrangement 2, heater 3, heat medium 31, solenoid 32, fluid reservoir 33, electromagnetic generator 34, pipeline 35, radiating fin 36, spraying steam pipe 4, exhaust apparatus 5, blower fan 51, blade 52, rotating shaft 53, backing pin 54, temperature-humidity detecting device 6, detecting device for moisture content 7, rick 8, main wicket 9, first actuating doors 10, operation room 11, the second actuating doors 12, dividing plate 13.
Detailed description of the invention
As in Fig. 1,2, a kind of lumber kiln, comprises kiln body 1, is provided with spraying steam pipe 4 in kiln body 1, and kiln body 1 is provided with main wicket 9.At least one group of air-supply arrangement 2 and heater 3 is provided with in kiln body 1;
Multiple exhaust apparatus 5 is provided with in kiln body 1;
Temperature-humidity detecting device 6 and detecting device for moisture content 7 is provided with in kiln body 1.Temperature-humidity detecting device 6, detecting device for moisture content 7, air-supply arrangement 2, heater 3 are all connected with master control set with the by-pass valve control of spraying steam pipe 4, and the master control set in this example just with PLC, realizes the automatic control of epidemic disaster thus.
The dry maximum temperature of lumber kiln of the present invention is at about 95 DEG C, and according to different moisture content, wet bulb is different with the temperature setting of dry bulb, and the usual drying of wood one week just can use, and can effectively eliminate stress.
Rick 8 is vertical to be contained in lumber kiln, the drying medium in kiln is driven by air-supply arrangement 2---air, material heap is entered after heater 3 heats, a part of heat is passed to timber, and absorb the moisture be evaporated in timber, then discharge a part of humid air by exhaust apparatus 5, suck a part of fresh air by air inlet pipeline simultaneously, under making drying medium maintain certain epidemic disaster condition, so that timber can obtain rational drying.Temperature-humidity detecting device 6 and detecting device for moisture content 7 dynamic measure the moisture content change of at least 4 measuring points, dry, the wet-bulb temperature in each moisture content stage can be set according to drying schedule, implement semiautomatic control by heater 3 and spraying steam pipe 4 and air inlet pipeline, exhaust apparatus 5 etc., semiautomatic control is conducive to according to material and dry progress amendment drying parameter.Improve dry mass, reduce labour intensity.
As in Fig. 1,2, be provided with dividing plate 13 in kiln body 1, air-supply arrangement 2 and heater 3 are positioned at the top of dividing plate 13.Structure thus, after the wind that air-supply arrangement 2 blows out enters heater 3, needs to walk around dividing plate 13 and just can contact with rick 8, can guarantee the uniformity of temperature, avoids occurring ftractureing because heating uneven, being out of shape.
Preferred scheme is as in Fig. 1, and described air-supply arrangement 2 and heater 3 are many groups, the air-supply arrangement 2 of many groups and heater 3 interlaced arrangement.The direction of namely blowing often is organized all different or contrary, be conducive to control temperature field thus, according to different dry results, utilize the part air-supply arrangement 2 and heater 3 of alternately opening interval, or open whole air-supply arrangements 2 and heater 3, carry out the change of control temperature field.
Described heater 3 is resistive heating device or sealed induction heating apparatus.
In described sealed induction heating apparatus, be provided with heat medium 31 in fluid reservoir 33, fluid reservoir 33 is circulated by pipeline 35 and connects, and be communicated with to be formed with fluid reservoir 33 by the two ends of pipeline 35 and circulate, the words of necessity adopt many pipelines 35 to be also feasible.Pipeline 35 is provided with multiple radiating fin 36, is wound with solenoid 32 outside fluid reservoir 33, and solenoid 32 is connected with electromagnetic generator 34.Preferably, outside fluid reservoir 33, be also provided with heat-insulation layer, solenoid 32 is outside heat-insulation layer.Structure thus, utilize solenoid to produce current vortex at steel fluid reservoir 33 and make fluid reservoir 33 heat heat medium 31, usual heat medium 31 adopts mineral oil, then the circulation of pipeline will be utilized, transfer heat to radiating fin 36, then by air-supply arrangement 2, the heat of radiating fin 36 is taken away.Adopt sealed induction heating apparatus significantly can reduce energy consumption.
In kiln body 1, be provided with dividing plate 13, spraying steam pipe 4 is positioned at the edge above dividing plate 13.Structure thus, avoids concentrating of humidity, is conducive to humidity is uniformly distributed.
Blower fan 51 is provided with in described exhaust apparatus 5, it is the inclined-plane of ventilation in the bottom of exhaust apparatus 5, blade 52 lower side and inclined-plane hinged, above blade 52, be provided with backing pin 54, after backing pin 54 limits the maximum unlatching of blade 52, be less than 89 ° with the angle of horizontal plane.Structure thus, it is less that blade 52 opens required windage.And when blower fan 51 stops, then blade 52 falls under gravity on inclined-plane, by inclined-plane shutoff.
The area being also provided with the first actuating doors 10, first actuating doors 10 at kiln body 1 is less than the area of main wicket 9;
Be provided with operation room 11 outside first actuating doors 10, be also provided with the second actuating doors 12 at operation room 11.Structure thus, carries out manual operation from operation room 11, can not have influence on the drying effect in kiln body 1.
The blast pipe of exhaust apparatus 5, through operation room 11, the blast pipe in operation room 11 is provided with heat-exchanger rig, is provided with air inlet pipeline at operation room 11.Structure thus, exhaust apparatus 5 utilizes the heating by the exhaust gases of discharging to replenish the fresh air of kiln, reclaims a part of heat.
During use, the present invention is through following steps:
1. the pre-heat treatment: when by the first moisture content of dry sawn timber lower than 50% time, carry out the pre-heat treatment, when first moisture content is more than 50%, can not the pre-heat treatment be carried out, preheating dry-bulb temperature 50-60 DEG C.The object of the pre-heat treatment is before non-drying, first make the abundant heat penetration of timber, and removes the already present drying stress of possibility.Processing method is the dry-bulb temperature of temperature-humidity detecting device 6 is reached temperature that the benchmark first stage requires, dry, wet-bulb temperature is poor is 2 DEG C, and the time of maintenance is determined by sawn timber thickness: the thick 1h of the thick 0.5h of the every 1cm of softwood, the every 1cm of broadleaf.
2. intermediate treatment: be the conditioning carried out in kiln run, its objective is to eliminate the dry top layer tensile stress produced in early stage, to prevent table from splitting, or eliminates the intermediary and later stages dry Surface hardened layer produced, to prevent deuterogenesis's implosion.The medium state of intermediate treatment: dry-bulb temperature t is not less than the fiducial temperature in stage at that time, major control wet-bulb depression △ t=2 DEG C.The time maintained: softwood or the thick 1.5h of the thick 1h of the every 1cm of Deciduous trees, the every 1cm of hard broadleaf, dry-bulb temperature 60-70 DEG C.
3. Balance Treatment: when the moisture content that inspection panel detects has met the requirements of whole moisture content, for whole material heap, some position or some sawn timber that just moisture content is higher may be had not yet to meet the requirements of whole moisture content, if sawn timber is thicker, also central layer not yet may parch, there is larger moisture gradient.If require higher to dry mass, at this moment Balance Treatment should be carried out, that the part that moisture content is higher continues dry, and moisture content comparatively lower part stopping or drying of slowing down, to improve whole material heap and along the drying uniformity on sawn timber thickness direction, according to the distribution of moisture content, opening section or whole air-supply arrangements 2 and heater 3, necessary words, in the lower part of moisture content, are kept the skin wet by spraying steam pipe 4.The condition of Balance Treatment is: dry-bulb temperature is still the dry-bulb temperature of final stage, and dry-bulb temperature 70-80 DEG C, wet-bulb depression is determined by the equilibrium moisture content of lower than whole moisture content 2%.The time that Balance Treatment maintains depends on the just degree of irregularity of moisture content and the drying uniformity of dry kiln and quality requirement, and every 1cm thickness about needs 2-6h.
4. end process: before kiln drying terminates, and generally should carry out end of a period process, to eliminate remaining drying stress.The condition of process: dry-bulb temperature is still the dry-bulb temperature of final stage, temperature 70-80 DEG C, dry, poor △ t=2 ~ 3 DEG C of wet-bulb temperature.Hold time: the every 1cm thickness of softwood 1 ~ 1.5h, the every 1cm thickness of broadleaf 1.5 ~ 2h, apparent mass require and drying schedule soft or hard degree and determine, if benchmark is softer and intermediate treatment is more abundant time, end of a period the processing time can be shorter; Otherwise if benchmark is comparatively hard or intermediate treatment is abundant not, the processing time of ending answers proper extension.
In timber kiln run, constantly or regularly with detecting device for moisture content 7 detect the change of its moisture content, then by benchmark requirement, set dry-bulb temperature and the wet-bulb depression in each moisture content stage.

Claims (10)

1. a lumber kiln, comprises kiln body (1), and kiln body (1) is provided with main wicket (9), it is characterized in that: be provided with at least one group of air-supply arrangement (2) and heater (3) in kiln body (1);
Multiple exhaust apparatus (5) is provided with in kiln body (1);
Temperature-humidity detecting device (6) and detecting device for moisture content (7) is provided with in kiln body (1).
2. a kind of lumber kiln according to claim 1, is characterized in that: in kiln body (1), be provided with dividing plate (13), and air-supply arrangement (2) and heater (3) are positioned at the top of dividing plate (13).
3. a kind of lumber kiln according to claim 1, is characterized in that: described air-supply arrangement (2) and heater (3) are many groups, the air-supply arrangement (2) of many groups and heater (3) interlaced arrangement.
4. a kind of lumber kiln according to claim 1, is characterized in that: described heater (3) is resistive heating device or sealed induction heating apparatus.
5. a kind of lumber kiln according to claim 4, it is characterized in that: in described sealed induction heating apparatus, heat medium (31) is provided with in fluid reservoir (33), fluid reservoir (33) is connected by pipeline (35) circulation, pipeline (35) is provided with multiple radiating fin (36), is wound with solenoid (32) outside fluid reservoir (33).
6. a kind of lumber kiln according to claim 5, is characterized in that: be also provided with heat-insulation layer outward at fluid reservoir (33).
7. a kind of lumber kiln according to claim 1, is characterized in that: in kiln body (1), be provided with spraying steam pipe (4), is provided with dividing plate (13) in kiln body (1), and spraying steam pipe (4) is positioned at the edge of dividing plate (13) top.
8. a kind of lumber kiln according to claim 1, it is characterized in that: in described exhaust apparatus (5), be provided with blower fan (51), it is the inclined-plane of ventilation in the bottom of exhaust apparatus (5), blade (52) lower side and inclined-plane hinged, be provided with backing pin (54) in the top of blade (52), backing pin (54) is less than 89 ° with the angle of horizontal plane after limiting the maximum unlatching of blade (52).
9. a kind of lumber kiln according to claim 1, is characterized in that: be also provided with the first actuating doors (10) at kiln body (1), and the area of the first actuating doors (10) is less than the area of main wicket (9);
Be provided with operation room (11) outside first actuating doors (10), be also provided with the second actuating doors (12) at operation room (11).
10. a kind of lumber kiln according to claim 9, is characterized in that: the blast pipe of exhaust apparatus (5), through operation room (11), the blast pipe in operation room (11) is provided with heat-exchanger rig, is provided with air inlet pipeline at operation room (11).
CN201510414611.5A 2015-07-15 2015-07-15 Lumber kiln Active CN104964527B (en)

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CN104964527B CN104964527B (en) 2017-06-09

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105716388A (en) * 2016-04-07 2016-06-29 陈建荣 Wood dryer
CN106247762A (en) * 2016-08-30 2016-12-21 北京五洲木国际实业有限公司 One type cabin Wood drying apparatus and drying means against the wind
CN107178993A (en) * 2017-04-28 2017-09-19 中南林业科技大学 Minute-pressure superheated steam Wood drying apparatus and application method
CN109489406A (en) * 2018-09-29 2019-03-19 江苏锐阳照明电器设备有限公司 A kind of air duct autocontrol method for LED light powder dryer
CN110173964A (en) * 2019-05-23 2019-08-27 安徽繁盛木业包装有限公司 A kind of lumber kiln

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Publication number Priority date Publication date Assignee Title
US20080256826A1 (en) * 2006-02-23 2008-10-23 Zarembinski Thomas P Drying cabinet with ventilation system
CN101644530A (en) * 2009-08-20 2010-02-10 杭州纳狄机械有限公司 Wood drying kiln full-automatic control system
CN202229285U (en) * 2011-07-21 2012-05-23 上海机金电子机械有限公司 Fireless multifunctional heating drier
CN102654351A (en) * 2012-05-31 2012-09-05 江西太升实业有限公司 Novel automatically-controlled wood drying kiln
CN204757580U (en) * 2015-07-15 2015-11-11 宜昌金宝乐器制造有限公司 Energy -saving full -automatic postforming borduring machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080256826A1 (en) * 2006-02-23 2008-10-23 Zarembinski Thomas P Drying cabinet with ventilation system
CN101644530A (en) * 2009-08-20 2010-02-10 杭州纳狄机械有限公司 Wood drying kiln full-automatic control system
CN202229285U (en) * 2011-07-21 2012-05-23 上海机金电子机械有限公司 Fireless multifunctional heating drier
CN102654351A (en) * 2012-05-31 2012-09-05 江西太升实业有限公司 Novel automatically-controlled wood drying kiln
CN204757580U (en) * 2015-07-15 2015-11-11 宜昌金宝乐器制造有限公司 Energy -saving full -automatic postforming borduring machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105716388A (en) * 2016-04-07 2016-06-29 陈建荣 Wood dryer
CN106247762A (en) * 2016-08-30 2016-12-21 北京五洲木国际实业有限公司 One type cabin Wood drying apparatus and drying means against the wind
CN106247762B (en) * 2016-08-30 2019-05-10 北京五洲木国际实业有限公司 A kind of type cabin Wood drying apparatus and drying means against the wind
CN107178993A (en) * 2017-04-28 2017-09-19 中南林业科技大学 Minute-pressure superheated steam Wood drying apparatus and application method
CN107178993B (en) * 2017-04-28 2019-07-09 中南林业科技大学 Minute-pressure superheated steam Wood drying apparatus and application method
CN109489406A (en) * 2018-09-29 2019-03-19 江苏锐阳照明电器设备有限公司 A kind of air duct autocontrol method for LED light powder dryer
CN110173964A (en) * 2019-05-23 2019-08-27 安徽繁盛木业包装有限公司 A kind of lumber kiln

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