CN101349496A - Dryer - Google Patents
Dryer Download PDFInfo
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- CN101349496A CN101349496A CNA2008101303913A CN200810130391A CN101349496A CN 101349496 A CN101349496 A CN 101349496A CN A2008101303913 A CNA2008101303913 A CN A2008101303913A CN 200810130391 A CN200810130391 A CN 200810130391A CN 101349496 A CN101349496 A CN 101349496A
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- air draft
- hot blast
- grain
- burner
- air
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- 238000001035 drying Methods 0.000 claims abstract description 43
- 238000002485 combustion reaction Methods 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 abstract description 10
- 238000007599 discharging Methods 0.000 abstract description 4
- 235000013339 cereals Nutrition 0.000 description 105
- 239000000428 dust Substances 0.000 description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 21
- 238000010981 drying operation Methods 0.000 description 8
- 229920006395 saturated elastomer Polymers 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 238000002309 gasification Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
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- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
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- 238000000034 method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 235000000023 Auricularia auricula Nutrition 0.000 description 1
- 241001149430 Auricularia auricula-judae Species 0.000 description 1
- 244000068988 Glycine max Species 0.000 description 1
- 235000010469 Glycine max Nutrition 0.000 description 1
- 241000219000 Populus Species 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
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- 239000007921 spray Substances 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B9/00—Preservation of edible seeds, e.g. cereals
- A23B9/08—Drying; Subsequent reconstitution
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B9/00—Preservation of edible seeds, e.g. cereals
- A23B9/02—Preserving by heating
- A23B9/025—Preserving by heating with use of gases
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2300/00—Processes
- A23V2300/10—Drying, dehydrating
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention relates to a drier in order to, in the drier with the function of returning air drafting and mixing with the hot blast flow, make the burning flame in the burner stable and promote the mixing of the hot blast and the air draft to achieve a highly effective drying. The drier in the invention is characterized in that: it is equipped with a burner (5) to generating hot blast; a hot blast chamber (11) for the hot blast to pass through; an exhausting fan (6) for absorbing and discharging the hot blast supplied to the dried object to absorb the moisture in the dried crop object as drafted air; and a returning channel for supplying the drafted air from fan exhausting fan (6) to the hot blast chamber (11). The exhaust port (e) of the returning channel is formed on a position closer to the front end side of the burning flame (Q) than the burning tray surface position.
Description
Technical field
The present invention relates to the agricultural product of grain or mushroom etc. or the drying machine of marine product or timber etc.
Background technology
In patent documentation 1 (spy opens clear-61-195266 communique), make itself and hot blast collaborate to carry out dry drying machine to air draft is returned and put down in writing.
Yet, in patent documentation 1, the drying machine of said structure is the structure of sneaking into and discharging towards burner from the outlet that connects path with the beginning of dry operating attached to the dust on the cereal, because burner directly faces air draft, so produced the shortcoming that the burning of burner is easy to disorder and so on.Be easy to attached to the shortcoming on the burner and so on but also produced dust.
Summary of the invention
The objective of the invention is to solve this problem, thereby make the combustion flame mixing stable and promotion hot blast and air draft of burner carry out the good drying of efficient.
The present invention has taked following technical measures in order to solve above-mentioned problem.
That is, the invention of scheme one is a kind of drying machine, it is characterized in that, hot blast is passed through and the front side of the main body 1 of the drying section 3 of dry object being provided with, and heating is set is taken into mouthful 50 extraneous airs that import and generates the burner 5 of hot blast from extraneous air; Be oppositely arranged the burning card 5d of this burner 5 with main body 1, the rear side of aforementioned body 1 be provided with attraction by the dry object of drying section 3 hot blast and be discharged to ventilating fan 6 outside this main body 1; Setting makes the part of the air draft of being discharged by ventilating fan 6 return the return path of the lateral location of burner 5; On this return path, the outlet e of air draft is set by combustion flame Q front more than the burning card 5d of burner 5 when position relative with main body 1 and side-looking.
The invention of scheme two is according to scheme one described drying machine, it is characterized in that dry object is a grain.
The present invention has following effect.
The invention of scheme one, make the part of the air draft of discharging return the return path of the lateral location of burner 5 by setting by ventilating fan 6, on this return path, the outlet e of air draft more is set by combustion flame Q front than the burning card 5d of burner 5 when position relative with main body 1 and side-looking, thereby side at the combustion flame Q of burner 5, discharge air draft with the state that the emission direction with combustion flame Q walks abreast in main body 1 one sides, so air draft is difficult to act on the combustion flame, combustion flame Q can be not disorderly, can carry out the burning of stable burner 5.And, can promote the mixing of air draft and hot blast.
In addition, directly do not face burner 5 by making air draft, thus the deterioration of the burner 5 that the effect of dust contained in the air draft or moisture etc. of can preventing causes.
The invention of scheme two, by giving grain with heat contained in the air draft and moisture, thereby to supplying with the more heat of grain internal feed, and utilize water in the air draft the inside that will be suppressed at grain from the moisture of grain surface evaporation.And, because by can promoting the transfer of internal moisture,, make its internal cracking that is difficult to cause grain with dry at a high speed time the etc. so can reduce inner moisture slope to face side to grain internal feed heat.
Description of drawings
Fig. 1 is the stereogram of the inside of explanation grain drier integral body.
Fig. 2 is the stereogram of the structure of explanation drying section and collection paddy portion.
Fig. 3 is the front view of the structure of explanation drying section and collection paddy portion.
Fig. 4 is the side view and the rearview of ventilating fan of the linkage structure of explanation first control valve and second control valve.
Fig. 5 is the stereogram that expression air draft service and air draft disperse case and ventilating fan.
Fig. 6 is the stereogram that explanation burner case and hot type wind pass through the inside of case.
Fig. 7 is the side view of explanation burner case inside.
Fig. 8 is the stereogram of explanation burner case inside.
Fig. 9 is the curve map of the relation of expression drying process and Gu Wen.
Figure 10 is the figure of the relation of expression air draft absolute temperature and grain moisture value.
Figure 11 explanation is supplied to the figure of the heat of grain.
Figure 12 is the figure of the ratio that flows backwards of expression change external air temperature and air draft that the amount of being absorbed in is caused.
Figure 13 is a calcspar.
Among the figure:
The 1-main body, 5-burner, the burning card of 5a-burner, the 6-ventilating fan, 11-hot blast chamber, 13-grain flows down path, the 20-exhaust duct, 22-second control valve, 23-first control valve, the 23a-turning cylinder, the 24-bar, 44-second return path, the burning card position of K-burner, e-the 5th air draft peristome, the Q-combustion flame.
The specific embodiment
The occasion that present embodiment is used for grain drier is described.
Fig. 1 is the stereogram of the inside of explanation grain drier integral body, is to carry out dry drying section 3 when the grain that in the inside of the main body 1 of rectangular shape the portion that accumulates 2 that accumulates grain from top is set, will be accumulated by the portion of accumulating 2 flows down downwards and gather collection paddy portion 4 by the grain of drying section 3 dryings.And, be trapped in that grain in the portion of accumulating 2 is supplied to that collection paddy portion 4 resupplies to the portion of accumulating 2 after by drying section 3 dryings and the structure of the so-called circulating grain drier of the structure of quality of regulation.
Also have, in the present embodiment, the length direction S of main body 1 is called fore-and-aft direction, will lack direction t and be called left and right directions.
In the front side of the fore-and-aft direction of main body 1 and the left and right directions middle position relative with drying section 3, be installed in extraneous air that face side is formed with a plurality of slit-shaped and be taken into mouthfuls 50 burner case 40, in this burner case 40, hold configuration burner 5.And, with the mode mounting burner 5 that the burning card 5d of burner 5 and main body 1 is relative.
At the rear side of the fore-and-aft direction of main body 1, ventilating fan 6 is set at the left and right sides middle position relative with drying section 3.
In addition, front side at the fore-and-aft direction of main body 1, and with the kick up lift 7 of grain of burner case 40 adjoining position settings, in the top of main body 1 dress transfer spiral (not shown) and the grain conveyance that will kick up with lift 7 in the portion of accumulating 2 top carrying device 8 and attract to remove the dust absorption fan 9 of sneaking into by the field trash of straw bits in the grain in 8 conveyances of top carrying device etc.
The 10th, the moisture meter of the moisture of detection grain is installed on the lift 7, detects the resistance value of every particle by the sample grain in each setting-up time extraction poplar grain and calculates moisture value.
The structure of drying section 3 is hot blast chambers 11 of passing through at the dry-heat air that the setting of the left and right sides of main body 1 is produced by burner 5, the exhaust air box 12 be communicated with ventilating fan 6 is set at the left and right sides of main body 1 central portion, between hot blast chamber 11 and exhaust air box 12, grain is set and flows down path 13, the rotary valve 14 that grain is outputed in the collection paddy portion 4 is set in the bottom that grain flows down path 13, and the grain that accumulates chamber 2 utilizes the rotation of rotary valve 14 to pass through successively.
Be provided with in the collection paddy portion 4 the bottom spiral 15 of grain conveyance to the lift 7.
Be provided on the top of exhaust duct 20 air draft is supplied to the air draft service 21 that the section of main body 1 inboard is square, be provided with at the air draft inlet of air draft service 21 and regulate second control valve 22 that is supplied to the exhaust air rate in the air draft service 21.
Otherwise second control valve 22 is positioned at fully open position gb, and when maximum air drafts was discharged in the air draft service 21, first control valve 23 was positioned at the closed position fb that the exhaust air rate of maximum is discharged to air draft supplying duct 21 1 sides.Also have, first control valve 23 and second control valve 22 are made the structure that can infinitely open and close adjusting respectively, and suitably regulate the exhaust air rate that is discharged to air draft service 21 by control part F.
As mentioned above, the structure that adopts is, by calculating the air draft amount of returning, the rotational angle θ of first control valve 23 is determined, and makes control valve CD-ROM drive motor 25 carry out the rotating interlock up to detecting rotational angle θ with the angle detecting sensor 23b that is assembled on the 23a.Also have, though what adopt is that second control valve 22 links with first control valve 23 and need not detect the structure of its rotational angle, even regulate also passablely but two control valves are constituted independently to rotate,, angle detecting sensor and control valve CD-ROM drive motor be set respectively in this occasion.
The structure that adopts is, when first control valve 23 is positioned at maximum exhaust air rate is discharged to the closed position fb of air draft service 21 1 sides, make from the turning cylinder 23a of first control valve 23 shorter than center to the length of inner peripheral surface 20a from exhaust duct 20 to the length b of periphery, and make the area of first control valve 23 littler, set gap z at interval so that can between this periphery 23a of the bottom of the exhaust duct 20 inner peripheral surface 20a and first control valve 23, form than the aperture area of exhaust duct 20.J is the rotary motion trace of first control valve 23.
In addition, first control valve 23 is discharged to maximum exhaust air rate the closed position fb of air draft service 21 1 sides, as shown in Figure 4, employing is positioned at the structure of low early and high after obliquity, the structure of low obliquity behind the height before second control valve 22 adopts and is positioned at, thus be easy to air exhausting guide in air draft service 21.
Between air draft service 21 and main body 1, be provided with across the left and right sides from the top of ventilating fan 6 and disperse the air draft of passage to disperse case 26 having passed through the air draft that becomes that air drafts in the air draft service 21 are distributed to the left and right sides.The structure that employing disperses air draft the rearward end of the Returning pipe 27 of the both ends, the left and right sides of case 26 and the indoor perforation path of formation hot blast described later to be communicated with by the first air draft peristome m.
Returning pipe 27 be along about hot blast chamber 11 in the path of the tubular that is equipped with of fore-and-aft directions, in the present embodiment, section shape forms the platform shape of top point.
Between main body 1 and burner case 40, possesses hot type wind by case 43, this hot type wind forms first return path 41 that the air draft returned in making by main body 1 passes through and passed through by the hot blast of burner 5 generations by case 43 in inside hot blast path 42.And, employing by the structure that the second air draft peristome p is communicated with, is adopted an end of Returning pipe 27 and first return path 41 simultaneously with first return path 41 and is formed at the structure that second return path 44 of the left and right sides of burner case 40 is communicated with by the 3rd air draft opening r.Below burner case 40, form dust and accumulate case 45.Employing is accumulated the structure that the upper end of the left and right sides of case 45 forms the 4th air draft peristome d and is communicated with second return path 44 at dust.
The structure of hot type wind by case 43 is elaborated.
Hot type wind is provided with by the hot blast paths in the case 43 42: the first hot blast path 46 that is communicated with burner case 40 by the 5th air draft peristome e; And the hot blast that will pass through the first hot blast path 46 is supplied to the second hot blast path 47 of hot blast chamber 11 via the 3rd hot blast peristome w from the second hot blast peristome v.
First return path 41 and the second hot blast path 47 are positioned at the positive left and right sides and form two sections, and the first hot blast path 46 is positioned at left and right sides center side and is arranged on the position relative with burner case 40.The first hot blast peristome c is formed at the central portion of the first hot blast path 46 and burner case 40.
Also have, in the present embodiment, will be generically and collectively referred to as return path up to the path that the air draft that arrives second return path 44 is passed through from air draft service 21.
To describing around the burner 5.
In burner case 40 and with burner 5 about in second return path 44 that is provided with, the 5th air draft peristome e that discharges air draft is set.Burning card position k than burner 5 is arranged to more towards main body 1 one sides in the position of the 5th air draft peristome e, and forms a plurality of slit-shaped.And the 5th air draft peristome e similarly forms relative with main body 1 one sides with the burning card 5d of burner 5.
And be to mix the 40a of portion mixing from the hot type wind of the 5th air draft peristome e air draft of discharging and the hot blast that generates by the burner 5 combustion flame Q side by being positioned at burner 5, mixed hot type wind by hot blast path 42, promptly the first hot blast path 46 and the second hot blast path 47 order by and be supplied to the structure of hot blast chamber 11.
In addition, the 5th air draft peristome e such as Fig. 7 and shown in Figure 8 also are formed with a plurality of slits towards the main body downside.
Employing is leaned on main body 1 one sides above burner 5 and than burning card position k, primary air that attracts burner 5 and the burner fan 5a that is supplied to burner 5 are set, and heating installationization also can be by means of air duct 5b to the structure of burner 5 air-supplies by the top that is positioned at combustion flame Q.
The 70th, detecting has the calm wind detecting plate that flows.5c is a combustion pump from fuel to burner 5 that supply with.
The combustion flame affirmation peristome 43a of the slit-shaped of the state of confirming combustion flame Q is set by the sidewall of case 43 at hot type wind, not only can confirm the state of combustion flame but also can import extraneous air, so the hot type wind that is difficult to pass through with hot blast passes through the heat heating sidewall of case 43.
Secondly, the hot blast that is generated by burner 5 is subjected to the sucking action of ventilating fan 6 and acts on from hot blast chamber 11 as dry-heat air and to become air draft after the grain that flows down path 13 and via exhaust air box 12 and return path, describe up to the process of mixing supply hot blast chamber, back 11 with hot blast.
The hot blast that is generated by burner 5 passes through the first hot blast peristome c from burner case 40, is supplied to hot blast chamber 11 from the first hot blast path 46 by the second hot blast peristome v, the second hot blast path 47, the 3rd hot blast peristome w.
Hot blast in the hot blast chamber 11 acts on and is discharged to exhaust air box 12 after grain absorbs water by in the grain that flows down path 13 at the grain that is formed with a plurality of slits (diagram is omitted) and flow down, and is discharged to exhaust duct 20 with ventilating fan 6 as air draft.
The exhaust air rate that air draft in the exhaust duct 20 utilizes the aperture control of first control valve 23 and second control valve 22 will be fit to needs is supplied to the air draft service 21 that is used in the circulation of hot blast chamber 11 sides once more via return path.
The air draft that is supplied to air draft service 21 is supplied to Returning pipe 27 from the first air draft peristome m about disperseing case 26 to be distributed to by air draft.And the air draft in the Returning pipe 27 from the second air draft peristome p via first return path 41, the 3rd air draft peristome r, second return path 44 from the 5th air draft peristome e and the parallel discharge of direction that sprays from the side of the combustion flame Q of burner 5 and combustion flame Q, the hot type wind mixing 40a of portion in the position relative with the burner card mixes with hot blast, is supplied to the first hot blast path 46 from the first hot blast peristome c.Also have, contained dust falls with deadweight in the air draft of second return path 44, accumulates in dust by the 4th air draft peristome d and accumulates case 45.
Secondly structure role and the effect to present embodiment describes.
By being supplied to hot blast chamber 11 from the air draft of exhaust duct 20, the heat in the air draft joins in the hot blast of being supplied with by burner 5, not only to 11 generation effects of hot blast chamber but also also generation effect of convection current underpass 13, Gu Wen is risen.And, by the amount of returning of control air draft, improve and to act on the absolute temperature of dry-heat air that grain flows down the grain of path 13, thereby can suppress amount of vaporization from the grain surface.
When supplying with dry-heat air that air draft mixes, the absolute temperature on the grain surface that utilization uprises suppresses will be from the amount of vaporization of grain surface evaporation, simultaneously, the heat that acts on grain mainly is the rising that promotes the paddy temperature, improve the water flow in the grain, and can reduce the inside of grain unit and the moisture gradient of face side, reduce that grain breaks and to carry out drying operation at a high speed.
In addition, in the present embodiment, technology as the gasification that suppresses the moisture in the grain, be not as for example Japanese kokai publication hei 7-260351 communique is put down in writing, to use other humidifier that grain is carried out humidification, but will give grain from the temporary transient moisture of removing of grain, so do not need to be used to remove again the unnecessary burning of the humidification moisture of humidification, fuel efficiency is good, and can carry out drying at a high speed.
In addition, when first control valve 23 is positioned at maximum exhaust air rate is discharged to the closed position fb of air draft service 21 1 sides, littler by constituting the area that makes first control valve 23 than the aperture area of exhaust duct 20, so that can between the end 23b of the inner peripheral surface 20a of the downside of exhaust duct 20 and first control valve 23, form gap z, contained bigger dust is easy to be discharged to outside the machine from the gap z of exhaust duct 20 in the air draft, dust is difficult to be deposited in from air draft service 21 in the air draft peripheral passage of the 3rd return path 45, and air draft is passed through smoothly.In addition, because air draft service 21 is positioned at the top of exhaust duct 20, bigger dust is difficult to enter air draft service 21 and can be easy to outside the machine of being discharged to.
By Returning pipe 27 is set in hot blast chamber 11, Returning pipe 27 temperature inside also uprise, the air draft of high humility that can prevent to contain dust dewfall and adhere to dust in Returning pipe 27.In addition, if setting is by the path of air draft in exhaust air box 12, the space that then produces exhaust air box 12 diminishes, the shortcoming that the attraction of ventilating fan 6 reduces, but just can utilize present embodiment to prevent these by being provided in the hot blast chamber 11.
By hot blast chamber 11 is arranged on the left and right sides, and exhaust air box 12 is arranged on the central portion of main body 1, the low occasion of temperature externally, the mist of the mixed high temperature of air draft and hot blast, high humility is difficult to dewfall in the exhaust air box 12 that passes through as air draft.
Before air draft is supplied to the first hot blast path 46 from Returning pipe 27, with at the side of the combustion flame Q of burner 5 and the parallel state of emission direction of combustion flame Q, via with second return path 44 of burner case 40 adjacency, discharge air draft from the 5th air draft peristome e thermotropism air draft mixing 40a of portion, thereby combustion flame Q is not disorderly, can carry out the burning of stable burner 5.And, owing to make the air draft interflow,, thereby can reduce the variation of combustion flame Q so the variation that can reduce to return exhaust air rate causes the variation by the air quantity of the periphery of burner 5 at the combustion side of burner 5.And can promote mixing of air draft and hot blast.And by not making air draft directly face burner 5, thereby the deterioration of the burner 5 that the effect of dust and moisture etc. of can preventing causes.
In addition, can make dust in the air draft fall morely and be deposited in dust and accumulate in the case 45, thereby the dust amount that is supplied to the first hot blast path 46 and hot blast chamber 11 is reduced.By return path being set, can improve the heat insulating ability of air draft with burner case 40 adjacency.
As described in present embodiment, directly heating extraneous airs and contained air is supplied in the drying machine of dry object with burning gases with burner 5, if contain the air draft of dust with the combustion flame Q heating of burner 5, then dust burning, this dust that has burnt is supplied to grain and has produced the situation that the quality of grain reduces, but according to present embodiment, dust is difficult to burning, can prevent that the quality of grain from reducing.
Secondly, the drying control to present embodiment describes.
Fig. 9 is the curve map that the variation of the variation of paddy temperature of drying operation and moisture value is followed in expression, and L1 represents the drying process of present embodiment, and L2 represents existing drying process.In addition, L3 represents the variation of the moisture value of present embodiment, and L4 represents the variation of existing moisture value.
What L2 represented is, in existing drying process, burner 5 is made as the curve map of constant occasion with quantity combusted, and after the burning beginning, temperature rises gradually, and Gu Wen rises with roughly certain inclination and finishes moisture up to reaching.
To this, the drying process of L1 carries out following operation.
At first, after the burning of burner 5 begins, at the appointed time (time that the grain that for example is absorbed in once circulates) first control valve 23 is opened fully, with air draft roughly full dose be discharged to outside the machine, after the beginning that prevents to burn soon, a lot of dust that produces is supplied to (dry initial stage full dose machine effluxes out operation A1) in the hot blast chamber 11 from return path once more.
Through after the stipulated time, regulate first control valve 23 and second control valve 22 so that return the state of the ratio of air draft above to stipulate (for example 75%) and temporarily be adjusted to constantly, and will be discharged to the return path side from a lot of air drafts that exhaust duct 20 is discharged to supply with in the hot blast mixing 40a of portion.Then, air draft mixes with the hot blast that is produced by burner 5, is supplied to the grain (dry initial stage full dose is returned operation A2) that flows down path 13 from hot blast chamber 11.
Therefore, utilize the heat supplied with and will suppress with the moisture that heat is supplied to from the moisture of the surface evaporation of grain, moisture stops at grain inside.Then, the heat by adding air draft on the heat that is produced by burner also gives grain, thereby makes Gu Wen obtain more heat, and paddy temperature is rising sharply.
Also have, this operation is returned the water yield by the external air temperature compensation, regulates air draft ratio low more that first control valve 23 and second control valve 22 make the high more backflow of external air temperature.In addition, this operation is to return the operation of maximum air drafts in the white drying operation.
Then, just carry out and to contain and the adjusting of returning with the air draft of the air draft absolute humidity Ha of the corresponding amount of moisture of moisture meter 10 detected grain moisture values (air draft absolute humidity returns operation A3) every setting-up time.And, supply with grain and flow down and do not surpass saturated vapor pressure in the path 13 and the degree of dewfall, be the air draft of the air draft absolute humidity Ha insatiety and the water vapor pressure and the water vapor pressure that reaches capacity near.
If approach to finish moisture value, then first control valve 23 and second control valve 22 make that by regulating control air draft is discharged to the outer ratio of machine successively to uprise, thereby Gu Wen is reduced gradually, reach and set moisture and carry out drying operation end paddy husking operation (finish and discharge operation A4) afterwards rapidly.
Here, as if being example with grain, illustrating that with Figure 11 drying theory promptly gives the situation of moisture and heat to grain, then in existing dry control, shown in Figure 11 (A), if will be made as 100 by the dry heat that burner 5 produces and forms to the dry-heat air for grain, then mainly consume the heat that is being used to make the water evaporates in the grain heat (for example 95) that promptly gasifies, the remaining rising that is used for Gu Wen at the dry initial stage.That is, the dry initial stage, because the moisture value height of grain, so a lot of heats of supplying with are used for the moisture gasification.Therefore, the dry heat of only simple increase impels the drying of grain face side faster than grain private side, and the moisture slope in the grain uprises on the contrary, and grain breaks and becomes easy.
Relative therewith, for the drying control of present embodiment, shown in Figure 11 (B), just return hot blast by the dry initial stage and also generate the dry-heat air of stipulating, grain is difficult to break and can realizes dry at a high speed.That is, if will be made as 100 by the heat that burner 5 produces, and add contained heat 50 in the air draft in the heat of this dry-heat air, then the heat behind the air draft interflow all reaches 150 in the dry-heat air.Here, site observation learns that the condition of new dry wind is, absolute humidity is near the saturated vapor pressure and at this below saturated vapor pressure.
Then, if new dry wind is acted on grain, the moisture that then has been given in the grain of heat will be from the gasification of grain surface, on the other hand, absolute humidity is as mentioned above by being adjusted near the saturation vapor pressure and below the saturated vapor pressure, thereby suppresses the water content detection from the grain surface, and the heat of being paid acts on grain inside, the heat of heat of for example being used to gasify is lower by 60 than existing 95, is used for the heat that Gu Wen rises and reaches 90.Therefore,, can promote moisture in the grain to move and the moisture slope can sharply not uprise, be difficult to take place grain and break although the paddy temperature sharply rises.
And, because the moisture value of the grain that detects in can corresponding drying is regulated the exhaust air rate that returns air draft, so do not need to detect the humidity sensor etc. of the humidity of air draft, cost can not uprise, while and can give the suitable moisture of dry object and guarantee that promptly grain flows down path 13 and carries out drying for the moisture of insatiety and water vapor pressure and near the degree saturated vapor pressure.
Site observation learns that more than the condition of Shuo Ming new dry wind obtains by the dry-heat air of burner 5 formation and the interflow of air draft.That is, absorb moisture and become air draft and be discharged from, focus on the absolute humidity adjustment air draft amount of returning of this air draft though act on the dry wind of grain.
Here, according to experiment as can be known, shown in the curve map of Figure 10, air draft absolute humidity is roughly corresponding with the moisture value of grain.That is, the high more air draft absolute humidity of the moisture value of grain is also high more.This be because, will be from the water vapour pressure height of grain surface gasification, so in order to suppress its corresponding more air draft humidity of its needs, and carry out drying operation, the low more amount of moisture from grain gasification of grain moisture value reduces more, and the amount of moisture that is used for suppressing the moisture of grain also can reduce.In the present embodiment, adopt the MF of storage portion that the curve of Figure 10 is stored in advance control part F, and derive the structure of the value of necessary air draft absolute humidity based on the data that detect moisture value.
If surpass saturated vapor, then might the vexed wet grain of dewfall and make quality impaired, but by the degree that does not surpass saturated vapor in air draft contained heat and moisture give grain and in the more heat of grain internal feed, utilize moisture in the air draft the inside that will be suppressed at the cereal object from the moisture of grain surface evaporation.If to the internal feed heat of grain, then owing to can promote the transfer of the face side of internal moisture, thereby can reduce the moisture slope of grain inside, make it with dry at a high speed the time, be difficult to cause grain internal cracking etc.
Secondly, use and represent numerical value that the control example of the aperture that is used to regulate control valve is described.
Supposing that with the detected external air temperature of external air temperature sensor TA be 20 ℃, is 70% with the detected outside humidity of extraneous air humidity sensor TH, and the absolute value Z that calculates with control part F is 13g/m
3And suppose with above-mentioned Figure 10 in the corresponding absolute humidity U that becomes the air draft Y that controls target that sets of grain moisture value that detects with moisture meter 10 be 25g/m
3Occasion.So, the air quantity of the ventilating fan 7 of present embodiment is 1900kg/h, and grain (paddy) amount that will be supplied to grain drier is made as 800kg, to represent that the dried lapse rate (average one hour dry moisture rate) of rate of drying is made as the occasion of 1.2%/h, the air draft that utilizes following formula to obtain how many ratios turns back to hot blast chamber 13.
Absolute humidity U-absolute humidity Z=12 (g/m
3) ... B1
The maximum water absorption that extraneous air can absorb water is
And the amount of moisture of removing from grain in average a hour is
800(kg)×1.2(％/h)＝9.6(kg/h) ...B3
According to the formula of B2 and the formula of B3
That is, control and regulation valve CD-ROM drive motor 25 is also regulated first control valve 23 and second control valve 22, so as the exhaust air rate that will discharge from ventilating fan 7 71% return the hot blast chamber.
That is, will be stored in the ME of storage portion in advance, and make control valve CD-ROM drive motor 25 carry out the rotating interlock accordingly with air draft ratio 71% based on the aforementioned calculation result with the rotational angle θ that returns above-mentioned first control valve 23 that ratio matches of air draft.
If above-mentioned arithmetic expression is described in further detail, then according to temperature and humidity by said external air temperature sensor TA and the detected extraneous air of said external air humidity sensor HA difference, by the absolute humidity Z of control part (not shown) computing extraneous air, union goes out the absolute humidity Z of extraneous air and is used as the absorbable maximum water absorption of extraneous air (B1 formula and B2 formula) according to the difference (the increase water yield) with the absolute humidity U of the predefined air draft of condition of moisture meter 10 detected grain moisture.Then obtain on the other hand from the evaporated water of grain evaporation (in the present embodiment by drying operation, the above-mentioned average amount of moisture of removing from grain in a hour) (formula of B3), the ratio that increases the water yield value worthwhile with respect to the evaporated water that forms with drying operation has been considered and the ratio that returns air draft.
That is what, the formula of above-mentioned B4 was represented is
Increase the water yield/(increase the water yield+from the water yield of cereal evaporation).
Also have, first control valve 23 and second control valve 22, therefore are difficult to remove new moisture from grain if more amount of moisture that returns just many more more being adjusted to the occasion that 71% amount more than exhaust air rate is turned back to hot blast chamber 11.In addition, first control valve 23 and second control valve 22 are being adjusted to the occasion that 71% the amount that will be less than exhaust air rate turns back to hot blast chamber 11, and the heat that turns back to hot blast chamber 11 tails off, so rise become difficulty and rate of drying of the temperature of grain is slack-off.
Regulate the ratio that returns air draft by the formula according to present embodiment, as far as possible suitably utilizing the heat that has from the air draft of ventilating fan 6 discharges is water absorbing force, thereby can carry out the good drying operation of efficiency of combustion.
Figure 12 figure that to be expression compensate the ratio that returns based on the air draft of setting based on the grain moisture value of above-mentioned Figure 10 and air draft absolute humidity.
Condition has been represented external air temperature and the grain amount of being absorbed in by way of compensation.Promptly compensate in the high more mode of the ratio reduction of returning air draft that makes more of external air temperature.And curve M 1, M2, M3, M4, M5 represent the compensation of the air draft return rate that the every kind of amount of being absorbed in causes.Compensate in the many more modes of the ratio reduction of returning air draft that make more of the amount of being absorbed in.
Because the high more drying that promotes grain more of external air temperature is so can reduce the amount of returning air draft correspondingly.In addition and since the amount of being absorbed in more many paddy temperature rise also highly more, so can reduce the amount of returning air draft correspondingly.
In the present embodiment, as the air draft amount of returning, be that deriving method is illustrated with the ratio of returning to the air draft full dose, still, be stored in the air draft amount of returning in the stocking mechanism in advance and to control the mode of this air draft amount of returning also passable.
In addition, in the present embodiment, the index of aridity of representing rate of drying is made as 1.2%, but the ratio that returns air draft can be according to dried lapse rate change.
Also have, in the present embodiment, obtain the absolute humidity of extraneous air, but also can regulation it be replaced outside humidity sensor as the value of substituting according to the absolute temperature of the extraneous air of external air temperature benchmark from extraneous air humidity sensor HA.
In the present embodiment, grain drier to paddy, wheat, soybean etc. is put down in writing, but in addition also can be used in the material that obtains with auricularia auriculajudae or timber or marine product etc. from the Nature, be the occasion of the drying machine of dry object in the surface portion of dry object and inside center part with the material of moisture slope.
Claims (2)
1. drying machine is characterized in that:
Hot blast is passed through and with the front side of the main body (1) of the drying section (3) of drying object being provided with, heating is set is taken into extraneous air that mouthful (50) import and the burner (5) that generates hot blast from extraneous air;
Be oppositely arranged the burning card (5d) of this burner (5) with main body (1),
Rear side in aforementioned body (1) is provided with ventilating fan (6), and this ventilating fan (6) attracts by the hot blast of the dry object of drying section (3) and is discharged to outside this main body (1);
Setting makes the part of the air draft of being discharged by ventilating fan (6) return the return path of the lateral location of burner (5);
On this return path, the outlet (e) of air draft is set by combustion flame (Q) front more than the burning card (5d) of burner (5) during in the position relative with main body (1) and in side-looking.
2. drying machine according to claim 1 is characterized in that:
Dry object is a grain.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007189375A JP5151289B2 (en) | 2007-07-20 | 2007-07-20 | Dryer |
| JP2007-189375 | 2007-07-20 | ||
| JP2007189375 | 2007-07-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101349496A true CN101349496A (en) | 2009-01-21 |
| CN101349496B CN101349496B (en) | 2010-09-08 |
Family
ID=40268374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101303913A Expired - Fee Related CN101349496B (en) | 2007-07-20 | 2008-07-16 | Dryer |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5151289B2 (en) |
| KR (1) | KR100981316B1 (en) |
| CN (1) | CN101349496B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102597673A (en) * | 2009-07-27 | 2012-07-18 | 阿肯色州立大学托管会 | Application of material properties to improve grain drying |
| CN108195184A (en) * | 2017-12-29 | 2018-06-22 | 湖南省农友机械集团有限公司 | A kind of small-sized corn mixed flow dryer |
| CN109724393A (en) * | 2017-10-27 | 2019-05-07 | 井关农机株式会社 | Crop drying machine |
| CN110487060A (en) * | 2018-05-15 | 2019-11-22 | 马忠高 | A kind of method of hot air circulation drying grain |
| CN113108585A (en) * | 2021-04-30 | 2021-07-13 | 合肥三伍机械有限公司 | Automatic grain drying equipment of circulation stoving |
| CN114294936A (en) * | 2021-12-16 | 2022-04-08 | 安徽正阳机械科技有限公司 | Drying-uniform auger-free dryer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5251029B2 (en) * | 2007-07-20 | 2013-07-31 | 井関農機株式会社 | Kernel drying method |
| JP5641111B2 (en) * | 2013-08-27 | 2014-12-17 | 井関農機株式会社 | Grain dryer |
| KR101618811B1 (en) * | 2014-05-13 | 2016-05-09 | (주)피엔티 | Heat-curing apparatus and thin membrane coating apparatus with the same |
| CN107490285B (en) * | 2017-09-26 | 2022-11-01 | 常州常发重工科技有限公司 | Air mixing device and air mixing method of grain dryer |
| CN115886283B (en) * | 2023-01-06 | 2023-05-19 | 福建省菌芝堂生物科技有限公司 | Edible fungus dehydration and drying device and application method thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61195266A (en) * | 1985-02-22 | 1986-08-29 | 井関農機株式会社 | Cereal grain drier |
| JPH0619221B2 (en) * | 1987-03-03 | 1994-03-16 | 関東自動車工業株式会社 | Flame-holding cylinder of air heat burner for hot air generator |
| JPH02126090A (en) * | 1988-11-04 | 1990-05-15 | Hokuto Koki Kk | Cereals drying apparatus |
| JPH09243257A (en) * | 1996-03-08 | 1997-09-19 | Dainichi Kogyo Kk | Garbage disposal machine |
| KR100276816B1 (en) | 1998-02-05 | 2001-01-15 | 김용현 | Circulating Grain Dryer with Improved Drying Hot Air Supply and Discharge Paths |
| JP4273513B2 (en) | 1999-03-01 | 2009-06-03 | 株式会社サタケ | Circulating grain dryer |
| JP2002336819A (en) * | 2001-05-17 | 2002-11-26 | Nisshin Kogyo Kk | Garbage dryer |
| KR100574832B1 (en) | 2006-03-16 | 2006-04-27 | (주)우성전자테크 | A heat-blowing type grain dryer having a far infraredsystem |
-
2007
- 2007-07-20 JP JP2007189375A patent/JP5151289B2/en not_active Expired - Fee Related
-
2008
- 2008-07-16 CN CN2008101303913A patent/CN101349496B/en not_active Expired - Fee Related
- 2008-07-18 KR KR1020080070215A patent/KR100981316B1/en not_active IP Right Cessation
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102597673A (en) * | 2009-07-27 | 2012-07-18 | 阿肯色州立大学托管会 | Application of material properties to improve grain drying |
| CN109724393A (en) * | 2017-10-27 | 2019-05-07 | 井关农机株式会社 | Crop drying machine |
| CN109724392A (en) * | 2017-10-27 | 2019-05-07 | 井关农机株式会社 | Crop drying machine |
| CN109724392B (en) * | 2017-10-27 | 2022-04-01 | 井关农机株式会社 | Crop dryer |
| CN108195184A (en) * | 2017-12-29 | 2018-06-22 | 湖南省农友机械集团有限公司 | A kind of small-sized corn mixed flow dryer |
| CN108195184B (en) * | 2017-12-29 | 2023-08-22 | 湖南省农友机械集团有限公司 | Small-size cereal mixed flow drying-machine |
| CN110487060A (en) * | 2018-05-15 | 2019-11-22 | 马忠高 | A kind of method of hot air circulation drying grain |
| CN113108585A (en) * | 2021-04-30 | 2021-07-13 | 合肥三伍机械有限公司 | Automatic grain drying equipment of circulation stoving |
| CN113108585B (en) * | 2021-04-30 | 2022-07-12 | 合肥三伍机械有限公司 | Automatic grain drying equipment of circulation stoving |
| CN114294936A (en) * | 2021-12-16 | 2022-04-08 | 安徽正阳机械科技有限公司 | Drying-uniform auger-free dryer |
| CN114294936B (en) * | 2021-12-16 | 2022-12-09 | 安徽正阳机械科技有限公司 | Drying-uniform auger-free dryer |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100981316B1 (en) | 2010-09-10 |
| CN101349496B (en) | 2010-09-08 |
| KR20090009751A (en) | 2009-01-23 |
| JP2009024948A (en) | 2009-02-05 |
| JP5151289B2 (en) | 2013-02-27 |
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