CN1858529B - External air flow distribution pulsation fluidizing drying device - Google Patents
External air flow distribution pulsation fluidizing drying device Download PDFInfo
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- CN1858529B CN1858529B CN2005100434266A CN200510043426A CN1858529B CN 1858529 B CN1858529 B CN 1858529B CN 2005100434266 A CN2005100434266 A CN 2005100434266A CN 200510043426 A CN200510043426 A CN 200510043426A CN 1858529 B CN1858529 B CN 1858529B
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Abstract
The external airflow distributed pulsate fluidizing drying apparatus includes drying tank, fluidizing bed, material guiding device and airflow distributor, and features that under each of the fluidizing beds, there are increased 'funnel' tubes with passage cross section varying rate greatly reduced along the material shifting direction. The airflow distributor is outside the drying tank and includes transmission shaft, rotating disc and cylinder shell. The hot airflow performs the double actions of both drying and material transmission.
Description
Technical field
The invention provides a kind of external air flow distribution pulsation fluidizing drying device, belong to the mechanical equipment technical field that agricultural product, chemical products are dehydrated.
Background technology
At present, the domestic agricultural product dried forms that generally adopts is the hot air convection drying, comprises fixed bed and common fluid bed etc.Wherein fixed bed drying speed is slower, and common fluid bed reaches fluidized state in order to make material, guarantees rate of drying, and thermal current pressure is generally all bigger, and flow velocity is higher, so energy consumption is bigger, and very easily produces phenomenons such as cavitation erosion, channel, local caking.The heated-air drying that adopts mostly is open at present, has not only wasted the energy greatly, and contaminated environment, causes working condition abominable.In a word, problem such as existing hot air convection drying mode exists the energy consumption height, and link hand-manipulated is many, and production efficiency is low, the market competitiveness is worse and worse.
So-called gas fluidized drying is meant that material in the drying box is in dry run, by a kind of air-flow institute fluidisation of press the some cycles variation.When material carries out drying in this state, help suppressing phenomenons such as the often cavitation erosion of appearance, channel, local caking in the common fluid bed, improve the motion state of material particles in air-flow, help viscous material and the drying that is not easy the fluidisation material.It is compared with traditional fluid bed, has advantages such as the particle size range broad, heat and mass speed height, the energy-saving effect that adapt to material be obvious.Utilize the pulsate fluidizing principle that material is carried out drying, can also reduce the thermograde and the gradation of moisture of granule interior.Result of study shows, because the endocorpuscular pulsation of fluid bed, nusselt number is big when not pulsing, and pulsation phenomenon is obvious more, and the particle heat transfer coefficient is just big more.Therefore, the strong pulsation of fluid bed endoparticle is favourable to conducting heat in the bed.If aggravate the fluctuation intensity of this particle artificially, be a kind of efficient ways of further strengthening the fluid-bed heat transfer mass transport process.For above-mentioned principle and characteristics, we have obtained confirmation by the result of the test that the built-in air flow distribution pulsation fluidizing drying machine of developing is voluntarily obtained, and have applied for patent of invention, and application number is: 200510042417.5.In order further to improve pulse pneumatic at distributing homogeneity on the bed with avoid the buildup phenomenon of material on bed surface, developed a kind of external air flow distribution pulsation fluidizing drying device.
Summary of the invention
The purpose of this invention is to provide the external air flow distribution pulsation fluidizing drying device of a kind of pulse pneumatic distributed uniform, mass transport smoothness, its technical scheme is:
Comprise drying box, bed surface is along the downward-sloping fluid bed of material moving direction, material guide device, flow distributor, wherein the top of casing is provided with charging aperture and exhaust outlet, the bottom is provided with discharging opening, material guide device is arranged in the blanking channel that is constituted between the blanking end of fluid bed and the cabinet wall, it is characterized in that: below every laminarization bed, be provided with a plurality of " funnel " pipe, the channel cross-section rate of change of each " funnel " pipe below the same fluid bed, the moving direction of material reduces gradually on the fluid bed, same " funnel " pipe is along the air-flow direction of the supply, the channel cross-section of " funnel " pipe (3) increases gradually, flow distributor is positioned at outside the drying box, comprise the power transmission shaft that rotates by motor-driven, the cylinder shell of rotating disc and two ends shutoff, the internal diameter notch cuttype of its middle shell changes, power transmission shaft is installed in the end cap of housing one end through bearing, and penetrate in the housing, the rotating disc that has scallop hole is fixed on the transmission the tip of the axis, housing is become two cavitys from lateral separation, internal diameter varies place: air supplying chamber and distributor chamber, distributor chamber internal diameter away from power transmission shaft is little, the inner chamber of distributor chamber is provided with the polylith deflector vertically, this cavity is divided into the fan-shaped die cavity that a plurality of angles equate, the fan-shaped angle of fan-shaped die cavity equates with the fan-shaped angle of rotating disc scallop hole, and radius is identical, and each fan-shaped die cavity is communicated with one " funnel " pipe through airduct respectively.
Described external air flow distribution pulsation fluidizing drying device, housing is assembled by two one end is uncovered, internal diameter is not of uniform size cylinders butt joints, is provided with bearing below, and rack-mount, through the air inlet machine of giving a dinner for a visitor from afar.
Described external air flow distribution pulsation fluidizing drying device, the fluid bed bed surface links to each other with the inwall of casing, the tilt adjustable of fluid bed, except that minimum blanking end, remaining three limit of fluid bed are provided with rib, and charging aperture is positioned at the top at fluid bed top, and discharging opening is positioned at the end of fluid bed.
Described external air flow distribution pulsation fluidizing drying device, be provided with multicompartment fluidized bed in the casing, every laminarization bed below all disposes a plurality of " funnel " pipe, the incline direction of adjacent fluid bed bed surface is opposite, except that the orlop fluid bed, the blanking end correspondence of all the other fluid beds is provided with vertical clapboard, and leaves certain blanking space formation blanking channel between cabinet wall.
Described external air flow distribution pulsation fluidizing drying device is provided with heat-insulation layer in the tank wall of drying box.
Its operation principle is: rotating disc becomes two cavitys with housing from lateral separation, internal diameter varies place: air supplying chamber and distributor chamber, and little away from the distributor chamber internal diameter of power transmission shaft, guarantee that air-flow can not enter distributor chamber from slit around the rotating disc.When the power transmission shaft of flow distributor is rotated by motor-driven, be fixed on rotating disc on the power transmission shaft also along with doing uniform rotation.Owing to have scallop hole on the rotating disc, and the diversed plate of distributor chamber inner chamber is divided into the fan-shaped die cavity that a plurality of angles equate, and scallop hole equates that with the angle of fan-shaped die cavity radius is identical.When the scallop hole on the rotating disc is aimed at some or during two fan-shaped die cavities, this chamber conducting is just passed through this chamber and airduct from the thermal current of hot air supply device, is communicated with one or two " funnel " pipe, produces an air-flow " pulse " and enters bed.Along with the rotation of rotating disc, when scallop hole was aimed at next fan-shaped die cavity, above-mentioned fan-shaped die cavity was closed, and has finished an air-flow " pulse ".Therefore, supply the thermal current of coming by air inlet,, just pass the fluid bed bed with the form of pulse pneumatic through behind the flow distributor by hot air supply device; The rotating speed that changes the flow distributor power transmission shaft can change ripple frequency, to satisfy the dry requirement of different material; Because the channel cross-section of " funnel " pipe increases successively along the air-flow direction of the supply, and thermal current is assigned in the fluid bed bed of material more equably.The fluid bed bed surface reduces gradually along the material moving direction, inclined, see through bed surface with the pulsation form and blow to air-flow in the bed of material, with the material bed that blows off momently, fall back to bed surface afterwards again, but since the inclination of bed move along parabolic path when making material leave bed surface, be that fall the back position of bed surface of material is positioned at the place ahead of the position of being blown off, thereby can realize that material can move forward along bed surface continuously in drying.When the material on upper strata fell into down the further drying of one deck by material guide device, operation principle was identical therewith; Material guide device separates material channel with gas channel, fundamentally solved " anti-stream " phenomenon that is produced when the less granular material of dry density falls, and makes the mass transport smoothness; When the moisture content of material reaches requirement after discharging opening flows out outside the drying box, therefore, this equipment can be realized continuous production.
The present invention is that " 200510042417.5 ", project name are on the technical foundation of " pulsate fluidizing drying machine " at application number compared with prior art, has newly designed flow distributor, and has set up " funnel " pipe, has following advantage:
1, flow distributor is positioned at the outside of pulsate fluidizing drying equipment casing, improved the uniformity that thermal current distributes on bed, when fan-shaped die cavity is in closed condition, the good sealing effect of rotating disc, strictly control on-off rhythm, improving the pulsation effect and the heat-transfer effect thereof of thermal current;
2, because the disperse function of " funnel " pipe that channel cross-section increases has successively further improved the uniformity that thermal current distributes on bed.Therefore, improved the drying effect of pulsate fluidizing drying equipment, serviceability is good.
Description of drawings
Fig. 1 is the structural representation that the present invention adopts two-layer fluid bed embodiment;
Fig. 2 is that the two-layer fluid bed of the present invention adopts the independently structural representation of external flow distributor embodiment;
Fig. 3 is the axial cutaway view of external flow distributor embodiment among the present invention;
Fig. 4 is an A-A cutaway view embodiment illustrated in fig. 3;
Fig. 5 is the structural representation of rotating disc embodiment among the present invention.
Fig. 6 is the structural representation of " funnel " pipe embodiment among the present invention.
Fig. 7 is a B-B profile embodiment illustrated in fig. 6.
The specific embodiment
1, charging aperture 2, stock guide 3, " funnel " pipe 4, casing 5, discharging opening 6, heat-insulation layer 7, supporting leg 8, airduct 9, fluid bed 10, material guide device 11, blanking channel 12, dividing plate 13, exhaust outlet 14, support 15, bearing 16, air inlet 17, motor 18, housing 19, scallop hole 20, air supplying chamber 21, end cap 22, bearing 23, bearing cap 24, distributor chamber 25, power transmission shaft 26, rotating disc 27, deflector
In the embodiment shown in Fig. 1～7, casing 4 tops are provided with charging aperture 1 and exhaust outlet 13, and the bottom is provided with discharging opening 5, and the bottom is provided with supporting leg 7.Be provided with the opposite two-layer fluid bed 9 of incline direction in the casing 4, fluid bed 9 bed surfaces link to each other the tilt adjustable of fluid bed 9 with the inwall of casing 4.Bed surface reduces gradually along the material moving direction, except that minimum blanking end, its excess-three limit is provided with rib, charging aperture 1 is positioned at the top at fluid bed 9 tops, discharging opening 5 is positioned at the end of fluid bed 9, so that utilize the panting action convey materials of air-flow, the blanking end correspondence of upper strata fluid bed 9 is provided with vertical clapboard 12, leave certain blanking space with casing 4 inwalls and constitute blanking channel 11, be provided with material guide device 10 in the blanking channel 11, be convenient to material and fall into lower floor's fluid bed 9 by material guide device 10, the waste gas of lower floor then enters last layer by the cavity that material guide device 10 and blanking channel 11 are constituted, and discharges from exhaust outlet 13.Corresponding to every laminarization bed 9, be provided with independently flow distributor in the outside of drying box 4, comprise by motor 17 and drive the power transmission shaft 25 that rotates, the cylinder shell 18 of rotating disc 26 and two ends shutoff, its middle shell 18 is uncovered by two one ends, internal diameter cylinder butt joint not of uniform size assembles, the internal diameter notch cuttype changes, power transmission shaft 25 is installed in the end cap 21 of housing 18 1 ends through bearing 22, and penetrate in the housing 18, the rotating disc 26 that has scallop hole 19 is fixed on the end of power transmission shaft 25, housing 18 is become two cavitys from lateral separation, internal diameter varies place: air supplying chamber 20 and distributor chamber 24, distributor chamber 24 internal diameters away from power transmission shaft 25 are little, the inner chamber of distributor chamber 24 is provided with three deflectors 27 vertically, this cavity is divided into three angles is 120 ° fan-shaped die cavity, the fan-shaped angle of fan-shaped die cavity equates with the fan-shaped angle of rotating disc 26 scallop holes 19, and radius is identical, and each fan-shaped die cavity is communicated with one " funnel " pipe 3 through airduct 8 respectively.When the power transmission shaft 25 driven rotary dishes 26 of flow distributor rotate, constantly open or close the gas channel that leads to " funnel " pipe 3, its switching frequency is identical with the rotating speed of rotating disc 26.Flow distributor is positioned at the outside of drying box 4, and because the disperse function of " funnel " pipe 3 that channel cross-section increases successively guarantees that distribution of air flow is even substantially.
Claims (5)
1. external air flow distribution pulsation fluidizing drying device, comprise drying box (4), bed surface is along the downward-sloping fluid bed of material moving direction (9), material guide device (10), flow distributor, wherein the top of casing (4) is provided with charging aperture (1) and exhaust outlet (13), the bottom is provided with discharging opening (5), material guide device (10) is arranged in the blanking channel (11) that is constituted between the blanking end of fluid bed (9) and casing (4) inwall, it is characterized in that: below every laminarization bed (9), be provided with a plurality of " funnel " pipe (3), the channel cross-section rate of change of each " funnel " pipe (3) below the same fluid bed (9), the moving direction of going up material along fluid bed (9) reduces gradually, same " funnel " pipe (3) is along the air-flow direction of the supply, the channel cross-section of " funnel " pipe (3) increases gradually, flow distributor is positioned at outside the drying box (4), comprise by motor (17) and drive the power transmission shaft (25) that rotates, the cylinder shell (18) of rotating disc (26) and two ends shutoff, the internal diameter of its middle shell (18) has notch cuttype to change, power transmission shaft (25) is installed in the end cap (21) of housing (18) one ends through bearing (22), and penetrate in the housing (18), the rotating disc (26) that has scallop hole (28) is fixed on the end of power transmission shaft (25), housing (18) is become two cavitys from lateral separation, internal diameter varies place: air supplying chamber (20) and distributor chamber (24), distributor chamber (24) internal diameter away from power transmission shaft (25) is little, the inner chamber of distributor chamber (24) is provided with polylith deflector (27) vertically, this cavity is divided into the fan-shaped die cavity that a plurality of angles equate, the fan-shaped angle of fan-shaped die cavity equates with the fan-shaped angle of rotating disc (26) scallop hole (19), and radius is identical, and each fan-shaped die cavity is managed (3) through airduct (8) and one " funnel " respectively and is communicated with.
2. external air flow distribution pulsation fluidizing drying device as claimed in claim 1, it is characterized in that: housing (18) is assembled by two the one cylinder butt joints that end is uncovered, internal diameter is not of uniform size, be provided with bearing (15) below, and be installed on the support (14), through air inlet (16) machine of giving a dinner for a visitor from afar.
3. external air flow distribution pulsation fluidizing drying device as claimed in claim 1, it is characterized in that: fluid bed (9) bed surface links to each other with the inwall of casing (4), the tilt adjustable of fluid bed (9), except that minimum blanking end, remaining three limit of fluid bed (9) are provided with rib, charging aperture (1) is positioned at the top at fluid bed (9) top, and discharging opening (5) is positioned at the end of fluid bed (9).
4. external air flow distribution pulsation fluidizing drying device as claimed in claim 1, it is characterized in that: be provided with multicompartment fluidized bed (9) in the casing (4), every laminarization bed (9) below all disposes a plurality of " funnel " pipe (3), the incline direction of adjacent fluid bed (9) bed surface is opposite, except that orlop fluid bed (9), the blanking end correspondence of all the other fluid beds (9) is provided with vertical clapboard (12), and leaves certain blanking space formation blanking channel (11) between casing (4) inwall.
5. external air flow distribution pulsation fluidizing drying device as claimed in claim 1 is characterized in that: be provided with heat-insulation layer (6) in the tank wall of drying box (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005100434266A CN1858529B (en) | 2005-05-08 | 2005-05-08 | External air flow distribution pulsation fluidizing drying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005100434266A CN1858529B (en) | 2005-05-08 | 2005-05-08 | External air flow distribution pulsation fluidizing drying device |
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| Publication Number | Publication Date |
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| CN1858529A CN1858529A (en) | 2006-11-08 |
| CN1858529B true CN1858529B (en) | 2010-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2005100434266A Expired - Fee Related CN1858529B (en) | 2005-05-08 | 2005-05-08 | External air flow distribution pulsation fluidizing drying device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338558B (en) * | 2011-10-23 | 2013-06-26 | 中冶焦耐(大连)工程技术有限公司 | Gas-material separation type flue gas diversion distribution device |
| CN104197680A (en) * | 2014-07-29 | 2014-12-10 | 安徽启明表面技术有限公司 | Preparation device special for chemical raw materials |
| CN107261986B (en) * | 2017-07-28 | 2023-05-16 | 上海涵欧制药设备有限公司 | Vertical discharging device of fluidized bed |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2114796U (en) * | 1991-11-08 | 1992-09-02 | 中国科学院工程热物理研究所 | Multi-layer multi-chamber fluidized bed dryer |
| US6189234B1 (en) * | 1998-04-08 | 2001-02-20 | International Technology Systems, Inc. | Continuous flow fluid bed dryer |
| CN2526764Y (en) * | 2002-01-17 | 2002-12-18 | 山东省科学院能源研究所 | Pulzating fluidized bed dryer with stirring conveying |
| CN2789691Y (en) * | 2005-05-08 | 2006-06-21 | 山东理工大学 | External airflow distributing pulsating fluidized drying equipment |
-
2005
- 2005-05-08 CN CN2005100434266A patent/CN1858529B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2114796U (en) * | 1991-11-08 | 1992-09-02 | 中国科学院工程热物理研究所 | Multi-layer multi-chamber fluidized bed dryer |
| US6189234B1 (en) * | 1998-04-08 | 2001-02-20 | International Technology Systems, Inc. | Continuous flow fluid bed dryer |
| CN2526764Y (en) * | 2002-01-17 | 2002-12-18 | 山东省科学院能源研究所 | Pulzating fluidized bed dryer with stirring conveying |
| CN2789691Y (en) * | 2005-05-08 | 2006-06-21 | 山东理工大学 | External airflow distributing pulsating fluidized drying equipment |
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| CN1858529A (en) | 2006-11-08 |
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Granted publication date: 20100428 Termination date: 20110508 |