CN105526785A - Hot air circulation drying box with even flow field and homogenizing method for hot air circulation drying box - Google Patents
Hot air circulation drying box with even flow field and homogenizing method for hot air circulation drying box Download PDFInfo
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- CN105526785A CN105526785A CN201610036234.0A CN201610036234A CN105526785A CN 105526785 A CN105526785 A CN 105526785A CN 201610036234 A CN201610036234 A CN 201610036234A CN 105526785 A CN105526785 A CN 105526785A
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- 238000001035 drying Methods 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000009826 distribution Methods 0.000 claims abstract description 93
- 230000005540 biological transmission Effects 0.000 claims abstract description 26
- 239000004744 fabric Substances 0.000 claims description 16
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- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 229910001095 light aluminium alloy Inorganic materials 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 24
- 239000000047 product Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 241000219977 Vigna Species 0.000 description 2
- 235000010726 Vigna sinensis Nutrition 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
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- 229910052742 iron Inorganic materials 0.000 description 1
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- 239000000203 mixture Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a hot air circulation drying box with an even flow field and a homogenizing method for the hot air circulation drying box. The device comprises a drying box body, an air inlet flue, an air outlet flue, an upper total air flue, an upper air distribution flue, a lower total air flue, a lower air distribution flue, an upper air distribution device and a lower air distribution device; and the upper air distribution device and the lower air distribution device are the same in structure, and the structure comprises more than three blades, a transmission mechanism, an adjusting button and more than one rotating shaft. According to the device, the rotating directions of the blades are controlled in a staged manner by rotating the blades, so that the air speeds and the air directions at the air inlet position and the air outlet position are changed, and the problems that the energy consumption is high due to the fact that drying of agricultural and sideline products is uneven, and products at the high-humidity positions for a long time are low in quality can be effectively solved.
Description
Technical field
The present invention relates to a kind of drying equipment, particularly relate to a kind of drying equipment with hot-air circulation and uniform drying method thereof.
Background technology
Drying equipment is one of visual plant of crops dry run, and different dry objects has different drying means, and wherein heated-air drying mode is a kind of drying mode more in current practical application.But hot blast cross-flow drying indoor there will be and cause the problems such as drying efficiency is low, the decline of dry products quality, energy consumption for drying increase because air flow method is uneven.A series of experimental study has been carried out for the common hot blast cross-flow drying equipment in family be made up of parts such as hot-blast stove, smoke exhaust fan, changement, air channel and drying bakers, drying baker hot blast is provided by hot-blast stove, and changement can make hot blast enter drying baker alternatively up and down.Drying oven is cube, evenly puts 14 layers of basin from top to bottom, and held by the gripper shoe of welding along two ends wall, hot blast evenly enters from the hot air distributor of baking oven bottom surface.Experimental result shows, when this drying system replaces air intake drying, in case, 3 layers, the top of 14 dish basins is faster than 8 layers, centre with the drying regime of bottom 3 layers, and often coil and all to a certain degree occur the situation of periphery rate of drying much larger than middle section, zone line is presented on one piece " wet island ".Not only cause material to complete the Time Inconsistency of dry run, thus affect final energy consumption for drying and product quality; But also can cause the material on " wet island " to be in the hot and humid and state of anoxic for a long time, fermentable wherein makes material downright bad, the yield of extreme influence material and product quality.
For this problem, many scholars are studied, the document " improving the research of box cross-flow drying room flow field uniformity " of the people such as Yin Yong (is published in " agricultural mechanical journal " 1993,24 volumes, the 3rd phase) think that air flow field distribution when utilizing unloaded cold conditions in drying box is rational as the index characterizing dry run uniformity; And propose and add at air intake vent and air outlet the measure that homogenating plate interferes interior flow field, namely between air inlet and material disc adjacent with it, add a porous plate (homogenating plate) form even air compartment, air-flow is fully mixed, improves the uniformity of whole dry room test.Homogenating plate normally offers the aperture of different pore size at diverse location, thus change the wind speed size entering aperture, to a certain degree reduce the non-uniform phenomenon in drying box, but this structure but can not change the wind direction entered in case, does not also possess controllability.The present invention, equally from the equally distributed angle of dry indoor hot air, devises and a kind ofly changes the hot blast wind speed entered in case, simultaneously the air-distribution device of adjustable wind direction.Have the hot air circulation drying oven of this air-distribution device, in its case, drying efficiency evenly distribution, thus can be improved in hot blast flow field.
Summary of the invention
The present invention is directed to existing drying equipment exists uneven drying phenomenon in agricultural byproducts dry run, provide a kind of hot air circulation drying oven of the even flow field with Novel cloth wind apparatus.
The scheme that the present invention improves above-mentioned technical problem is as follows: the hot air circulation drying oven of even flow field comprises drying box 1, air inlet duct 7, exhaust passage 9, upper total air channel 12, upper cloth air channel 3, lower total air channel 6, lower cloth air channel 5, upper air-distribution device 2, lower air-distribution device 4, lower air-distribution device 4 is arranged on drying box 1 bottom, upper air-distribution device 2 is arranged on drying box 1 top, air inlet duct 7 is preached by lower total air channel 6 and the leeward be arranged on below lower air-distribution device 4 and 5 to be communicated with, the upper cloth air channel 3 be arranged on above air-distribution device 2 is communicated with exhaust passage 9 by upper total air channel 12, exhaust passage 9 is communicated with air inlet duct 7, exhaust passage 9 is provided with exhaust blower 14, one end of air inlet duct 7 is provided with the heat source 8 of circulating air, above separated by air-duct clapboard 11 between total air channel 12 and lower total air channel 6, exhaust passage 9 is provided with dehumidifying exhaust apparatus 10, upper air-distribution device 2 is identical with the structure of lower air-distribution device 4, this structure comprise more than 3 blade 19, transmission mechanism, adjustment button 13, with lobe numbers just as rotating shaft 20, rotating shaft 20 two ends to be arranged on before and after drying box on inwall by bearing, blade 19 is fixed on rotating shaft 20, transmission mechanism comprises actuator and final drive part, actuator is connected with the adjustment button 13 be arranged on outside drying box 1, and final drive part is coaxially connected with rotating shaft 20.
Described transmission mechanism is rack and pinion drive mechanism, its actuator is and the driven wheel 16 regulating button 13 to be connected, driven wheel 16 is arranged on driving rack 15 one end and engages with it, driving rack 15 to be arranged in drying box and to engage with 3 final drive parts formed with upper transfer gear 17, and travelling gear 17 is coaxially connected with rotating shaft 20 one end.
Described transmission mechanism is rack pinion, its actuator is and the driven wheel 16 regulating button 13 to be connected, driven wheel 16 is arranged on driving rack 15 one end and engages with it, driving rack 15 to be arranged in drying box and to engage with the final drive part that the travelling gear 17 be positioned in the middle part of driving rack 15 is formed, this travelling gear 17 is coaxially connected with 1 rotating shaft 20 one end, and the blade 19 be arranged on rotating shaft 20 is connected as a whole by more than 1 connecting rod 18 with other blades.
Described transmission mechanism is V belt translation, its actuator is and the belt wheel regulating button 13 to be connected, final drive part is 1 or 2 drive pulleys 22, belt wheel is connected with drive pulley 22 by driving-belt 21, drive pulley 22 is coaxially connected with rotating shaft 20 one end, and the blade 19 be arranged on rotating shaft 20 is connected as a whole by more than 1 connecting rod 18 with other blades.
Described connecting rod 18 is High-strength channel steel or angle steel.
Described blade is light aluminum alloy thin slice or highstrenghtpiston's thin slice, and the width of blade is 14 ~ 20cm.
Often organize blade, rotating shaft is all identical with the physical dimension of final drive part.
Described dehumidifying exhaust apparatus 10 is conventional hydrofuge exhaust equipment.
Apparatus of the present invention hot blast enters lower total air channel 6 of drying box side by air inlet duct 7, then leeward sermon 5 is entered, enter in drying box 1 by lower air-distribution device 4 with certain speed and direction, upper cloth air channel 3 is entered through upper air-distribution device 2 after carrying out heat and mass with material in drying box, flow into upper total air channel 12 again, and flow out from the exhaust passage 9 being provided with exhaust blower 14, circulating air heats up and starts next round circulation in heat source 8, above separated by air-duct clapboard 11 between total air channel 12 and lower total air channel 6, exhaust passage 9 also offers dehumidifying exhaust apparatus 10.Different from traditional air distribution plate, upper air-distribution device and lower air-distribution device adopt louvre blade form, and upper air-distribution device 2 is identical with the structure of lower air-distribution device 4, comprises multiple blade 19, transmission mechanism, adjustment button, rotating shaft, transmission mechanism can be rack pinion or V belt translation, for rack pinion, comprise and the driven wheel 16 regulating button 13 to be connected and driving rack 15, by regulate button 13(manually or micromachine) rotary actuation gear 16 time, the driving rack 15 be engaged with starts to move left and right, then the multiple travelling gears 17 engaged with driving rack are driven to rotate, travelling gear 17 is coaxially connected to the front end of the rotating shaft 20 be evenly arranged along drying box left and right distance, rotating shaft 20 two ends are fixed on the front and back wall of drying box by bearing, each rotating shaft 20 is connected with the blade 19 of a central aperture.Visible, travelling gear 17 rotarily driven rotating shaft 20, then driven the rotation of each blade; Because each travelling gear 17 engaged with driving rack tooth bar has same size, so the rotation direction that blade is identical can be ensured.
In such scheme, rack and pinion gearing can also simplify, without the need to arranging multiple travelling gear 17, only need a travelling gear be engaged with 17 being set in driving rack centre position, and arranging two connecting rods 18 in the rear and front end of each blade by the mode that perforate is blocked.When unique travelling gear 17 rotates, coaxial blade starts to rotate, and two connecting rods 18 in turn ensure that rest blade synchronous rotary, achieve identical function.Also can change rack pinion into V belt translation, be made up of driving-belt 21 and conduction belt wheel 22, front 1 ~ 2 each correspondence of blade arranges drive pulley 22, drive pulley 22 is connected to one end of the rotating shaft 20 be evenly arranged along drying box left and right distance of corresponding numbering equally, concentric zones moving axis blade rotates, and rest blade realizes synchronous rotary by connecting rod.
Take axis of rotation as initial point, definition blade upper part and the angle to the right between horizontal line are the anglec of rotation, namely regulate the corresponding relation between the action of button 13 and blade rotary angle to demarcate in advance to the original driving of the different kind of drive.The blade rotary angle of lower air-distribution device 4 can be adjusted to 0 ~ 45 ° by drying at the beginning, and the blade rotary angle of upper air-distribution device 2 is adjusted to 90 ~ 135 °, and air inlet/outlet windage can be made all to reduce, and wind speed strengthens, and takes away material surface moisture fast.After 60 minutes, every 30 minutes, the contention of the blade rotary of upper air-distribution device 2 is gradually adjusted to 0 ~ 45 °, increases air-out windage, allow hot blast stay for some time in drying box more, take away the moisture of the more difficult evaporation of internal batch.In dry 180 ~ 360 minutes mid-terms, gradually the blade rotary angle of lower air-distribution device 4 can be adjusted to 45 ~ 135 ° every 60 minutes, increase the hot blast rate that distally (on the right side of drying box) enters, improve the situation that in drying box, right side dry materials is insufficient.At the 60min in dry latter stage, the blade rotary angle of lower air-distribution device 4 can be kept to be 135 °, the blade rotary angle of upper air-distribution device 2 is 30 ~ 45 °, hot blast windage is increased further, play stewing firmly hot blast in drying box and improve the effect of material water ratio inhomogeneities, experiment proves, when air moisture content is lower, stewing firmly a period of time greatly can alleviate the situation of uneven drying.
The drying box of the equal wind apparatus of this band louvered, there is following beneficial effect: by can the transmission device of adjusting vane rotation direction, for the drying property of different material, control by stages blade rotation direction, thus change the wind speed and direction of air intake place and wind outlet, hot blast each position in casing can be stayed for some time, decrease the short circuit behavior that hot blast walks minimum drag passage, in drying box, field of flow is more even, and the moisture distribution of material in dry run is also average.Effectively can improve the problem that energy consumption is high and long-term high humility place product quality is low that agricultural byproducts uneven drying is brought, reduce drying cost, improve the overall product quality of dried material.Blade commutation is by manual or micro machine control realization, and apparatus structure is compact and manufacture is simple, easy to operate.
Accompanying drawing explanation
Fig. 1 is the hot air circulation drying oven structural representation of even flow field of the present invention;
The side-looking structural representation of Fig. 2 to be transmission mechanism of the present invention be rack pinion;
The plan structure schematic diagram of Fig. 3 to be transmission mechanism of the present invention be rack pinion;
The structural representation of Fig. 4 to be transmission mechanism of the present invention be V belt translation;
In figure: 1-drying box; The upper air-distribution device of 2-; The upper cloth air channel of 3-; Air-distribution device under 4-; Cloth air channel under 5-; Total air channel under 6-; 7-air inlet duct; 8-heat source; 9-exhaust passage; 10-dehumidifies exhaust apparatus; 11-air-duct clapboard; The upper total air channel of 12-; 13-regulates button; 14-exhaust blower; 15-driving rack; 16-driven wheel; 17-travelling gear; 18-connecting rod; 19-blade; 20-rotating shaft; 21-driving-belt; 22-conducts belt wheel; 23-belt wheel.
Detailed description of the invention
Below by drawings and Examples, the present invention is described in further detail, but scope is not limited to described content.
Embodiment 1: as Fig. 1, shown in 2, the hot air circulation drying oven of this even flow field comprises drying box 1, air inlet duct 7, exhaust passage 9, upper total air channel 12, upper cloth air channel 3, lower total air channel 6, lower cloth air channel 5, upper air-distribution device 2, lower air-distribution device 4, lower air-distribution device 4 is arranged on drying box 1 bottom, upper air-distribution device 2 is arranged on drying box 1 top, air inlet duct 7 is preached by lower total air channel 6 and the leeward be arranged on below lower air-distribution device 4 and 5 to be communicated with, the upper cloth air channel 3 be arranged on above air-distribution device 2 is communicated with exhaust passage 9 by upper total air channel 12, exhaust passage 9 is communicated with air inlet duct 7, exhaust passage 9 is provided with exhaust blower 14, one end of air inlet duct 7 is provided with the heat source 8 of circulating air, above separated by air-duct clapboard 11 between total air channel 12 and lower total air channel 6, exhaust passage 9 is provided with dehumidifying exhaust apparatus 10, upper air-distribution device 2 is identical with the structure of lower air-distribution device 4, this structure comprises 8 blades 19, transmission mechanism, regulate button 13, the rotating shaft 20 of 8, rotating shaft 20 two ends to be arranged on before and after drying box on inwall by bearing, blade 19 is fixed on rotating shaft 20, transmission mechanism is rack and pinion drive mechanism, its actuator is and the driven wheel 16 regulating button 13 to be connected, driven wheel 16 is arranged on driving rack 15 one end and engages with it, driving rack 15 to be arranged in drying box and to engage with the final drive part that 8 travelling gears 17 form, travelling gear 17 is coaxially connected with rotating shaft 20 one end.
Hot blast enters lower total air channel 6 of drying box side by air inlet duct 7, then leeward sermon 5 is entered, enter in drying box 1 through lower air-distribution device 4 with certain speed and direction, upper cloth air channel 3 is entered through upper air-distribution device 2 after carrying out heat and mass with material in drying box, flow into upper total air channel 12 again, and flow out from the exhaust passage 9 being provided with exhaust blower 14, circulating air heats up and starts next round circulation in heat source 8, above separated by air-duct clapboard 11 between total air channel 12 and lower total air channel 6, exhaust passage 9 also offers dehumidifying exhaust apparatus 10.Different from traditional air distribution plate, this air-distribution device adopts louvre blade form, transmission mechanism is rack pinion, manually rotate and regulate button 13, driven wheel 16 is driven to rotate, the driving rack 15 be engaged with starts to move left and right, then the multiple travelling gears 17 engaged with tooth bar are driven to rotate, travelling gear 17 is connected to the front end of the rotating shaft 20 be evenly arranged along drying box left and right distance, rotating shaft 20 two ends are fixed on the front and back wall of drying box by bearing, each rotating shaft 20 is connected with the blade 19 of a central aperture, blade to be width the be light aluminum alloy thin plate of 15 centimetres, visible, travelling gear 17 rotarily driven rotating shaft 20, then driven the rotation of each blade 19.Because each travelling gear 17 engaged with tooth bar has same size, ensure that the rotation direction that blade is identical.
Said apparatus is used for dry mushroom, according to the characteristic curve of mushroom drying, corresponding air-distribution device control method is as follows: take axis of rotation as initial point, definition blade upper part and the angle to the right between horizontal line are the anglec of rotation, then the blade rotary angle of lower air-distribution device 4 can be adjusted to 45 ° by drying at the beginning, and the blade rotary angle of upper air-distribution device 2 is adjusted to 135 °, and air inlet/outlet windage can be made all to reduce, wind speed strengthens, and takes away material surface moisture fast.After 60 minutes, respectively the blade rotary angle of upper air-distribution device 2 was adjusted to 90 °, 60 °, 45 °, 30 ° respectively every 30 minutes, allows hot blast stay for some time in drying box more, take away the moisture of the more difficult evaporation of internal batch.After being dried to 180 minutes, gradually the blade rotary angle of lower air-distribution device 4 is adjusted to 60 °, 90 °, 120 ° and 135 ° every 60 minutes, increases the hot blast rate that distally (on the right side of drying box) enters, improve the situation that in drying box, right side dry materials is insufficient.At 60min in dry latter stage subsequently, the blade rotary angle keeping lower air-distribution device 4 is 135 °, the blade rotary angle of upper air-distribution device 2 is 45 °, hot blast windage is increased further, play stewing firmly hot blast in drying box and improve the effect of material water ratio inhomogeneities, experiment proves, when air moisture content is lower, hot blast is boiled in a covered pot over a slow fire the situation that a period of time greatly can alleviate uneven drying.
Embodiment 2: as shown in Figure 1,3, the hot air circulation drying oven structure of this even flow field is with embodiment 1, difference is that air-distribution device 2 is identical with the structure of lower air-distribution device 4, this structure comprises 6 blades 19, transmission mechanism, adjustment button 13,6 rotating shafts 20, rotating shaft 20 two ends are arranged on before and after drying box on inwall by bearing, and blade 19 is fixed on rotating shaft 20; Transmission mechanism is rack pinion, its actuator is and the driven wheel 16 regulating button 13 to be connected, driven wheel 16 is arranged on driving rack 15 one end and engages with it, driving rack 15 to be arranged in drying box and to engage with the final drive part that the travelling gear 17 be positioned in the middle part of driving rack 15 is formed, this travelling gear 17 is coaxially connected with 1 rotating shaft 20 one end, and the blade 19 be arranged on this rotating shaft 20 is connected as a whole by 2 connecting rods 18 with other blades.
Hot blast enters lower total air channel 6 of drying box side by air inlet duct 7, then leeward sermon 5 is entered, enter in drying box 1 through lower air-distribution device 4 with certain speed and direction, upper cloth air channel 3 is entered through upper air-distribution device 2 after carrying out heat and mass with material in drying box, flow into upper total air channel 12 again, and flow out from the exhaust passage 9 being provided with exhaust blower 14, circulating air heats up and starts next round circulation in heat source 8, above separated by air-duct clapboard 11 between total air channel 12 and lower total air channel 6, exhaust passage 9 also offers dehumidifying exhaust apparatus 10.Different from traditional air distribution plate, this air-distribution device adopts louvre blade form, rack and pinion gearing simplifies, and only need arrange a travelling gear be engaged with 17 in driving rack centre position, and arrange two connecting rods 18 in the rear and front end of each blade by the mode that perforate is blocked; By regulating button 13(micromachine) drive driven wheel 16 to rotate, the driving rack 15 be engaged with starts to move left and right, tooth bar centre position arranges a travelling gear be engaged with 17, the moving belt nutating gear 17 of driving rack rotates, when unique travelling gear 17 rotates, coaxial blade starts to rotate, and two connecting rods 18 in turn ensure that rest blade synchronous rotary, achieve identical function; In order to ensure that connecting rod has enough strength and stiffness transmission of drive force, connecting rod 18 adopts High-strength channel steel; Blade is highstrenghtpiston's thin slice, and the width of blade is 18cm.
Said apparatus is used for dry cowpea, and according to the characteristic curve of cowpea drying, corresponding air-distribution device control method is as follows: take axis of rotation as initial point, and definition blade upper part and the angle to the right between horizontal line are the anglec of rotation.The blade rotary angle of lower air-distribution device 4 can be adjusted to 45 ° by drying at the beginning, and the blade rotary angle of upper air-distribution device 2 is adjusted to 135 °, and air inlet/outlet windage can be made all to reduce, and wind speed strengthens, and takes away material surface moisture fast.After 60 minutes, respectively the blade rotary angle of upper air-distribution device 2 was adjusted to 90 °, 60 °, 30 ° respectively every 30 minutes, allows hot blast stay for some time in drying box more, take away the moisture of the more difficult evaporation of internal batch.After being dried to 150 minutes, gradually the blade rotary angle of lower air-distribution device 4 is adjusted to 60 °, 90 °, 120 ° and 135 ° every 60 minutes, increases the hot blast rate that distally (on the right side of drying box) enters, improve the situation that in drying box, right side dry materials is insufficient.At 60min in dry latter stage subsequently, the blade rotary angle keeping lower air-distribution device 4 is 135 °, the blade rotary angle of upper air-distribution device 2 is 45 °, hot blast windage is increased further, play stewing firmly hot blast in drying box and improve the effect of material water ratio inhomogeneities, experiment proves, when air moisture content is lower, hot blast is boiled in a covered pot over a slow fire the situation that a period of time greatly can alleviate uneven drying.
Embodiment 3: as shown in Fig. 1,4, the hot air circulation drying oven structure of this even flow field is with embodiment 1, difference is that air-distribution device 2 is identical with the structure of lower air-distribution device 4, this structure comprises 10 blades 19, transmission mechanism, adjustment button 13,10 rotating shafts 20, rotating shaft 20 two ends are arranged on before and after drying box on inwall by bearing, and blade 19 is fixed on rotating shaft 20; Transmission mechanism is V belt translation, its actuator is and the belt wheel 23 regulating button 13 to be connected, final drive part is 2 drive pulleys 22, belt wheel 23 is connected with drive pulley 22 by driving-belt 21, drive pulley 22 is coaxially connected with rotating shaft 20 one end, and the blade 19 be arranged on rotating shaft 20 is connected as a whole by 2 connecting rods 18 with other blades; Connecting rod 18 is high-strength corner iron, and blade is light aluminum alloy thin slice, and the width of blade is 20cm;
Hot blast enters lower total air channel 6 of drying box side by air inlet duct 7, then leeward sermon 5 is entered, enter in drying box 1 through lower air-distribution device 4 with certain speed and direction, upper cloth air channel 3 is entered through upper air-distribution device 2 after carrying out heat and mass with material in drying box, flow into upper total air channel 12 again, and flow out from the exhaust passage 9 being provided with exhaust blower 14, circulating air heats up and starts next round circulation in heat source 8, above separated by air-duct clapboard 11 between total air channel 12 and lower total air channel 6, exhaust passage 9 also offers dehumidifying exhaust apparatus 10; Different from traditional air distribution plate, this air-distribution device adopts louvre blade form, transmission mechanism is V belt translation, movable belt pulley 23 is with to rotate by regulating button 13, driving-belt 21 makes drive pulley 22 rotate, the respective vanes 19 that final drive central aperture is connected on rotating shaft 20 rotates, vaned rear and front end arrange two connecting rods 18 by the mode that perforate is blocked, other blade realizes synchronous rotary by connecting rod 18.
Said apparatus is used for dry pimiento, and corresponding air-distribution device control method is as follows: take axis of rotation as initial point, and definition blade upper part and the angle to the right between horizontal line are the anglec of rotation.The blade rotary angle of lower air-distribution device 4 can be adjusted to 45 ° by drying at the beginning, and the blade rotary angle of upper air-distribution device 2 is adjusted to 120 °, and air inlet/outlet windage can be made all to reduce, and wind speed strengthens, and takes away material surface moisture fast.After 60 minutes, respectively the blade rotary angle of upper air-distribution device 2 was adjusted to 90 °, 60 °, 30 ° respectively every 30 minutes, allows hot blast stay for some time in drying box more, take away the moisture of the more difficult evaporation of internal batch.After being dried to 150 minutes, gradually the blade rotary angle of lower air-distribution device 4 is adjusted to 60 °, 90 °, 120 ° and 135 ° every 60 minutes, increases the hot blast rate that distally (on the right side of drying box) enters, improve the situation that in drying box, right side dry materials is insufficient.At 60min in dry latter stage subsequently, the blade rotary angle keeping lower air-distribution device 4 is 135 °, the blade rotary angle of upper air-distribution device 2 is 30 °, hot blast windage is increased further, play stewing firmly hot blast in drying box and improve the effect of material water ratio inhomogeneities, experiment proves, when air moisture content is lower, hot blast is boiled in a covered pot over a slow fire the situation that a period of time greatly can alleviate uneven drying.
Claims (8)
1. the hot air circulation drying oven of an even flow field, it is characterized in that: comprise drying box (1), air inlet duct (7), exhaust passage (9), upper total air channel (12), upper cloth air channel (3), lower total air channel (6), lower cloth air channel (5), upper air-distribution device (2), lower air-distribution device (4), lower air-distribution device (4) is arranged on drying box (1) bottom, upper air-distribution device (2) is arranged on drying box (1) top, air inlet duct (7) by lower total air channel (6) and be arranged on lower air-distribution device (4) below leeward preach (5) be communicated with, the upper cloth air channel (3) being arranged on air-distribution device (2) top is communicated with exhaust passage (9) by upper total air channel (12), exhaust passage (9) is communicated with air inlet duct (7), exhaust passage (9) is provided with exhaust blower (14), one end of air inlet duct (7) is provided with heat source (8), above separated by air-duct clapboard (11) between total air channel (12) and lower total air channel (6), exhaust passage (9) is provided with dehumidifying exhaust apparatus (10), upper air-distribution device (2) is identical with the structure of lower air-distribution device (4), this structure comprise more than 3 blade (19), transmission mechanism, adjustment button (13), with lobe numbers just as rotating shaft (20), rotating shaft (20) two ends to be arranged on before and after drying box on inwall by bearing, blade (19) is fixed on rotating shaft (20), transmission mechanism comprises actuator and final drive part, actuator be arranged on drying box (1) adjustment button (13) outward and be connected, final drive part is coaxially connected with rotating shaft (20).
2. the hot air circulation drying oven of even flow field according to claim 1, it is characterized in that: transmission mechanism is rack and pinion drive mechanism, its actuator is and the driven wheel (16) regulating button (13) to be connected, driven wheel (16) is arranged on driving rack (15) one end and engages with it, driving rack (15) to be arranged in drying box and to engage with 3 final drive parts formed with upper transfer gear (17), and travelling gear (17) is coaxially connected with rotating shaft (20) one end.
3. the hot air circulation drying oven of even flow field according to claim 1, it is characterized in that: transmission mechanism is rack pinion, its actuator is and the driven wheel (16) regulating button (13) to be connected, driven wheel (16) is arranged on driving rack (15) one end and engages with it, driving rack (15) to be arranged in drying box and to engage with the final drive part that the travelling gear (17) being positioned at driving rack (15) middle part is formed, this travelling gear (17) is coaxially connected with 1 rotating shaft (20) one end, the blade (19) be arranged on rotating shaft (20) is connected as a whole by more than 1 connecting rod (18) with other blades.
4. the hot air circulation drying oven of even flow field according to claim 1, it is characterized in that: transmission mechanism is V belt translation, its actuator is and the belt wheel regulating button (13) to be connected, final drive part is 1 or 2 drive pulleys (22), belt wheel is connected with drive pulley (22) by driving-belt (21), drive pulley (22) is coaxially connected with rotating shaft (20) one end, and the blade (19) be arranged on rotating shaft (20) is connected as a whole by more than 1 connecting rod (18) with other blades.
5. the hot air circulation drying oven of the even flow field according to claim 3 or 4, is characterized in that: connecting rod (18) is High-strength channel steel or angle steel.
6. the hot air circulation drying oven of even flow field according to claim 1, is characterized in that: blade is light aluminum alloy thin slice or highstrenghtpiston's thin slice.
7. the hot air circulation drying oven of even flow field according to claim 6, is characterized in that: the width of blade is 14 ~ 20cm.
8. the using method of the hot air circulation drying oven of even flow field according to claim 1, it is characterized in that: by regulating button (13), blade (19) anglec of rotation is regulated, the blade rotary angle of lower air-distribution device (4) is adjusted to 0 ~ 45 ° by initial stage of drying, and the blade rotary angle of upper air-distribution device (2) is adjusted to 90 ~ 135 °; After 60 minutes, every 30 minutes, the contention of the blade rotary of upper air-distribution device (2) is gradually adjusted to 0 ~ 45 °; In dry 180 ~ 360 minutes mid-terms, gradually the blade rotary angle of lower air-distribution device (4) can be adjusted to 45 ~ 135 ° every 60 minutes; At the 60min in dry latter stage, the blade rotary angle keeping lower air-distribution device (4) is 135 °, and the blade rotary angle of upper air-distribution device (2) is 30 ~ 45 °.
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| CN106048199A (en) * | 2016-08-01 | 2016-10-26 | 河南省天利工业炉有限公司 | Large-scale average-temperature table type low-temperature annealing furnace |
| CN106070529A (en) * | 2016-07-25 | 2016-11-09 | 吉首大学 | Heat-pump-type recuperation of heat cured fish drying device |
| CN112063078A (en) * | 2020-09-19 | 2020-12-11 | 河北河汇新材料科技有限公司 | Preparation method of hydroxyl modified vinyl chloride-vinyl acetate copolymer resin |
| CN113551511A (en) * | 2021-07-28 | 2021-10-26 | 天津大学 | Material heating dehydration method and device |
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| CN105526785B (en) | 2017-12-22 |
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