WO2007013866A1 - Apparatus for drying of wet dispersed raw materials - Google Patents
Apparatus for drying of wet dispersed raw materials Download PDFInfo
- Publication number
- WO2007013866A1 WO2007013866A1 PCT/UA2005/000051 UA2005000051W WO2007013866A1 WO 2007013866 A1 WO2007013866 A1 WO 2007013866A1 UA 2005000051 W UA2005000051 W UA 2005000051W WO 2007013866 A1 WO2007013866 A1 WO 2007013866A1
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- WO
- WIPO (PCT)
- Prior art keywords
- inlet
- raw material
- pipe heater
- dispersed raw
- vacuum
- Prior art date
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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
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/18—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact
- F26B3/22—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source and the materials or objects to be dried being in relative motion, e.g. of vibration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
- F26B17/101—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure having the shape of one or a plurality of shafts or ducts, e.g. with substantially straight and vertical axis
- F26B17/105—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure having the shape of one or a plurality of shafts or ducts, e.g. with substantially straight and vertical axis the shaft or duct, e.g. its axis, being other than straight, i.e. curved, zig-zag, closed-loop, spiral
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/04—Heating arrangements using electric heating
- F26B23/06—Heating arrangements using electric heating resistance heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
- F26B5/041—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum for drying flowable materials, e.g. suspensions, bulk goods, in a continuous operation, e.g. with locks or other air tight arrangements for charging/discharging
Abstract
Apparatus for thermal-vacuum drying of wet dispersed raw material comprises of a heat-insulated housing (1) equipped with resistance-type heater (2) connected to a current source, a liquid-packed ring vacuum-pump (3) equipped with an inlet (4) for suction of steam and an outlet in atmosphere, and a product receiver (5). The heater (2) is formed as a pipe heater and connected from the inlet to a feeder for supply of wet dispersed raw material, and the product receiver (5) is formed as a separate vacuum-tight housing connected to an outlet of said pipe heater (1) and to said inlet (4) of said vacuum-pump (3). Such apparatus provide for increase of productiveness and decrease of energy expenses at the drying of arbitrary wet dispersed raw materials.
Description
APPARATUS FOR DRYING OF WET DISPERSED RAW MATERIALS
Field of the Invention
The invention relates to structure of apparatuses for thermal-vacuum drying of arbitrary wet dispersed raw materials. For the purpose of this description, the following terms as employed herein and in the appended claims refer to the following concepts:
"thermal-vacuum drying" refers to such processing of wet dispersed raw materials that provides their heating and, at the same time, suction of water vapour (i.e. steam, and, sometimes, other volatile substances) until specified value of product's residual moisture could be attained;
"wet dispersed raw materials" refers - first, to such wet free-flowing materials as seed, sand, pebbles, powder-like limestone or dolomite, saw dust and wood chips etc., second, to such easy-flowing materials as true solutions of arbitrary salts, fruit and/or vegetable juices, milk of farming animals and/or artificial milk based on soy-beans, nuts and the like, third, to watered mineral, vegetable, and other paste-like materials; "product' refers to dispersed material, which was dried (or concentrated) up to specified residual moisture; "resistance-type heater" refers to such part of said apparatus for drying of wet dispersed raw materials that is - made from inert in respect of wet dispersed raw materials electroconductive material having high electrical resistivity, equipped with usual means for connection to an arbitrary (direct or alternating) current supply, and contacting, at the drying time, with wet dispersed raw materials; "apparatus for thermal-vacuum drying" refers to such drying machine that is equipped with at least one resistance-type heater and one liquid-packed ring vacuum-pump.
Background Art It is well known that need of drying of wet dispersed raw materials is large-scale.
Therefore, drying machines must be satisfying, at the same time, a few with difficulty compatible requirements, namely: they must have simple structure, and, accordingly, must be service-strong, simple and easy to-manufacture and to-use, they must provide for efficient production under condition of reasonable power consumption, and they must be suitable for transportation and quick deployment, and must provide for stable parameters of drying and obtaining of off-the-shelf products independently of maintenance staff skill.
Unfortunately, only some of those requirements can be successfully fulfilled at present.
For example, it is well-known flow-through apparatus for convective gas drying (see entry "Drier" in the Great encyclopaedic Dictionary "POLYTECHNICAL", Moscow, Scientific publishing house "Great Russian Encyclopedia", 1993, p.514 / BoribiuoM 3Hi4MκnoπeflMMecκMM cπoεapb « FlOJl MTEXH HH ECKH lλ», M.: HayMHoe M3flaτenbcτBθ «Bonbiuafi PoccMMCKaa 3Hi4nκnoπeflMsq», 1993, c.514, cτaτb?ι «Cyuunjiκa»). Such apparatus consists of: hard (as a rule, metallic) housing having an inlet for connection to a producer of fresh gaseous heat carrier and an outlet for venting of spent heat carrier or for return of such heat carrier into a system of its regeneration and recirculation, such pallets for stowage of wet dispersed raw material that are rigidly connected to the housing walls (in cyclically operating driers) or placed on suitable conveyers (in continuously operating driers), at least one suitable producer of fresh gaseous heat carrier, for example, gas burner or (usually electrical) air heater, a suitable means (for example, a fan) for blowing up fresh gaseous heat carrier into said'housing, arbitrary means for compartition of stream of said fresh heat carrier within the layers of wet dispersed raw materials, and at least a system for temperature measuring within said housing and means for manual control of heat flows (but more often - an automatic control system that services the drying apparatus as a whole).
, It is known for each person skilled in art that described apparatuses may be designing nowadays in interactive mode by suitable CAD system. Such system allows option of optimal scheme of heat carrier's circulation about wet dispersed raw materials and basic blocks for residual heat utilization too.
However, driers based on all-metal housings equipped with thick external heat- insulation are bulky if even its productivity is not great, and their specific material capacity increases as the drying chamber volume decreases. Moreover, convective heating causes such losses of heat, which tend to increase as heat-transfer coefficient . from gaseous heat carrier to wet dispersed raw material decreases, and does not provide homogeneous temperature field even within thin layers of such raw material.
Known from the same document driers equipped with microwave heaters provide practically homogeneous temperature field in all mass of wet dispersed raw material, but have elaborate design. Their exploitation requires significant accuracy of the staff, and their dearness decreases demand.
Said disadvantages may be eliminated by thermal-vacuum drying [see Goryaev A.A. Vacuum-dielectric drying of wood (review), Moscow: VNIPIEILesprom, 1977 / TopaeB
A.A. BaκyyMHθ-flM3neκrpnMecκaa cyιuκa flpeBecwHbi (o63op). - M.: BHUπHΘMπecπpoM, 1977].
In such process, water can evaporate from arbitrary wet raw material at temperature which substantially below than temperature of its vaporization at atmospheric pressure. It eliminates practically overheat of raw material and spoilage of product (as a result, for example, of destruction of vitamins in animals' milk or in vegetable and fruit juices, and of thermal denaturation of proteins and enzymes in seeds of plants).
It is obvious that driers realized such processes must - firstly, prevent blocking of vacuum-pumps by water, and, secondly, equalize temperature field in mass of arbitrary wet raw material in order to avoid its local underheating.
First requirement was fulfiled easily by use of a liquid-packed ring vacuum-pump as necessary part of an apparatus for thermal-vacuum drying (RU 346 U1 , 1993). These vacuum-pumps are able to absorb not only steam condensate but steam as such also. Naturally, said improvement is effective for drying of any wet raw material.
However, equalization of temperature field in mass of raw material may be achieved if sizes, forms and physical-chemical properties of dryable objects could be taking into consideration. For example, RU 2047 U1 discloses such device for thermal-vacuum drying that is (together with vacuum impregnator) a part of cable production machine. This device comprises of: at least two pallets for placement of wet cable hanks, a support for stacking said pallets one after another and their fixation in working position with gap, a gas-tight housing formed as metallic vacuum cauldron that isolates volume filled by pallets from atmosphere, an external heat source for heating of dryable material (especially formed as such said vacuum cauldron's steam or water jacket that is connected to heat-generator), at least one liquid-packed ring vacuum-pump for suction of steam evolved from heating dryable material, and at least one nipple for connection of said vacuum-pump to said housing. This device is suitable for drying of free-flowing wet dispersed raw materials. Unfortunately, the heating through the vacuum cauldron's wall always results in underheating of said raw material placed in central parts of pallets. Therefore, equalization of residual moisture in all mass of product can be provided only by long "maturing" of raw material under a vacuum. Accordingly, productivity of drying comes down, and the energy expenses increase. Moreover, the described device is practically useless for drying of paste-like and, especially, fluid dispersed materials.
UA 2545 U discloses such improved apparatus for drying of wet dispersed raw materials that is nearest constructively to proposed further apparatus. It consists of: . a heat-insulated housing, at least one arranged within said housing resistance-type heater of wet dispersed raw materials that is equipped with means for its connection to a current source (this known heater is shaped as at least one perforated electroconductive pallet), at least one liquid-packed ring vacuum-pump, which is equipped with an inlet for suction of steam evolved from heating dispersed raw material and an outlet in atmosphere, and at least one product receiver.
Unfortunately, described apparatus allows to heat practically uniformly such wet dispersed raw materials as cut fruits and vegetables or seed and may operate in periodic mode only. Accordingly, load of pallets, vacuumization of housing, rise of pressure within said housing to barometric pressure at the end of each cycle of drying, and unload of pallets require significant expenses of time and cause losses of heat.
Summary of the Invention
The invention is based on the problem to create - by modification of design of the resistance-type heater and product receiver and interconnection of said components and other units - such apparatus which would provide for highly productive thermai- vacuum drying of arbitrary (i.e. free-flowing, paste-like, and fluid) wet dispersed raw materials and decrease of energy expences.
This problem is solved in that in an apparatus for thermal-vacuum drying of wet dispersed raw materials comprising: a heat-insulated housing, at least one arranged within said housing resistance-type heater of wet dispersed raw material that is equipped with means for its connection to a current source, at least one liquid-packed ring vacuum-pump, which is equipped with an inlet for suction of steam evolved from heating dispersed raw material and an outlet in atmosphere, and at least one product receiver, according to the invention said resistance-type heater is formed as a pipe heater and connected from the ■ inlet to a feeder for supply of wet dispersed raw material, and said product receiver is formed as a separate vacuum-tight housing connected to an outlet of said pipe heater and to said inlet of said vacuum-pump.
This apparatus provides for high-productive continuous thermal-vacuum drying free-flowing, paste-like, and fluid wet dispersed raw materials and decrease of energy expences as a result of high-effective heating of raw material stream within said pipe
heater.
First additional feature consists in that said pipe heater is coiled. This allows to decrease overall dimensions of apparatuses according to the invention.
Second additional feature consists in that said coiled pipe heater is mounted practically upright and connected to said feeder for supply of wet dispersed raw material from below and to said product receiver from above. This embodiment of the invention is the most suitable for drying of non-cohesive free-flowing dispersed raw materials.
Third additional feature consists in that said feeder comprises of: at least one such communicating with atmosphere bunker, open flow area of which restricts in the line of top-down, at least one practically horizontal belt conveyor that is located under outlet of said bunker, and at least one suction nipple that adjoins to the belt conveyor by its lower end and, by its upper end, is connected to the inlet of said cojled pipe heater.
This facilitates supply of wet free-flowing dispersed raw materials into said pipe heater.
Fourth additional feature consists in that - said bunker is located within said heat-insulated housing, said coiled pipe heater is located within radial clearance between outside walls of said bunker and said heat-insulated housing, and the hollow between outside walls of said bunker and said heat-insulated housing is sealed and connected to the inlet of said vacuum pump.
This allows to decrease losses of heat additionally. Fifth additional feature consists in that said belt conveyor is equipped with changeable belt, a spreading knife for smoothing of layer of wet dispersed raw material before its suction into said coiled pipe heater, and such collector of spillage of said raw material, that is located under said belt. This allows to adjust supply of wet dispersed raw material efficiently and to eliminate losses of its practically. Sixth additional feature consists in that - said coiled pipe heater is mounted practically upright and connected from above to said feeder for supply of wet dispersed raw material and from below to said product receiver which is located under said heat-insulated housing, and said receiver and said housing are connected to the inlet of said vacuum pump. This embodiment of the invention is the most suitable for concentration by evaporation of such fluid media as true solutions, suspensions, emulsions, and plastic pastes (spreads).
Seventh additional feature consists in that the outlet end of said coiled pipe heater is equipped with a flow regulator. This allows to adjust efficiently duration of stay
of processed raw material within said coiled pipe heater.
Eighth additional feature consists in that each pipe-line, which directly or indirectly connected to said inlet of said vacuum pump, is equipped with at least one locking and regulating device. This allows (using manual or automatic control) to adjust the apparatus according to the invention for efficient drying of raw materials having variable initial moisture.
Ninth additional feature consists in that the input part of said coiled pipe heater is connected to the inlet of said vacuum pump through an additional pipe-line equipped with a shutoff valve. This allows to clean efficiently the coiled pipe heater from accidentally stuck particles of free-flowing wet dispersed raw materials.
Tenth additional feature consists in that said additional pipe-line is connected to the inlet of said vacuum pump through said product receiver. This eliminates demand for use of any intermediate tank for accumulation of wet dispersed raw material sucked off from said coiled pipe heater. Eleventh additional feature consists in that the inlet end of said coiled pipe heater is equipped with an additional means for regulable air inflow. This allows to adjust concentration of free-flowing particles in stream of wet dispersed raw material and effectiveness of heating of this material, and, in that way, to influence indirectly on value of residual moisture of product. Brief Description of the Drawings
The invention will now be explained by detailed description of the structure and the operation of proposed apparatus with reference to the accompanying drawings, in which: Fig.1 shows an apparatus for thermal-vacuum drying of wet dispersed raw materials supplied bottom-up, and Fig.2 shows an analogous apparatus for thermal-vacuum drying of preferably fluid or paste-like wet dispersed raw materials supplied top-down.
Best Mode Carrying Out the Invention
Any embodiment of the proposed apparatus (see Figs 1 and 2) comprises of: as a rule, one heat-insulated housing 1 , at least one arranged within said housing 1 resistance-type pipe heater 2 of wet dispersed raw material, which is equipped with not shown apart suitable well-known means for its connection to a suitable current source; the heater 2 is, as a rule, coiled and arranged practically upright; at least one liquid-packed ring vacuum-pump 3, which is equipped with an inlet 4 for suction of steam evolved from heating dispersed raw material, and with a not shown apart an usual outlet in atmosphere, and at least one such receiver 5 of dryed (or concentrated) product that is shaped as separate vacuum-tight housing. This receiver 5 comprises of: a placed about its midst sensor 6 of critical load level (thus, during working hours,
volume part of the receiver 5 below said sensor 6 serves as an accumulator of buffer stock of product, and volume part of the receiver 5 above said sensor 6 serves as a vapor space), and an (arranged at the bottom of said receiver 5) means 7, which is suitable for continuous or periodic unloading of said receiver 5 and, at the same time, for maintenance of minimal buffer stock of product nearby its bottom and required residual pressure in its vapor space. Such means 7 may provide above-mentioned unloading by gravity or using suitable well-known device for forced evacuation of product (for example, sector gate, pump, embedded-in-tube conveyer screw etc.). Said pipe heater 2 is connected from the inlet to a feeder for supply of wet dispersed raw material, and said product receiver 5 (from side of its vapor space) is connected to the outlet of said pipe heater 2 and to the inlet 4 of said vacuum-pump 3.
The structure according to Fig.1 provides for use of the underside end of said pipe heater 2 as the inlet into drying apparatus. Accordingly, vapor space of said product receiver 5 must be connected to the top end of said pipe heater 2 by crossover pipe-line 8 and to the inlet 4 of said vacuum-pump 3 by pipe-line 9.
The structure according to Fig.2 provides for use of the top end of said pipe heater 2 as the inlet into drying apparatus. Accordingly, said product receiver 5 is located usually under said pipe heater 2, the receiver's 5 vapor space is connected to the underside end of said pipe heater 2 by crossover pipe-line 10, and the vacuum-pump's 3 inlet 4 is connected with receiver's 5 vapor space and housing's 1 hollow by common pipe-line 11 equipped with not designated apart outlets.
The feeder of the apparatus according to Fig.1, that is meant preferably for drying of free-flowing dispersed raw materials, usually comprises of - at least one such communicating with atmosphere bunker 12, open flow area of which restricts in the line of top-down, at least one practically horizontal belt conveyor 13 located under the outlet of said bunker 12, and at least one suction nipple 14 that adjoins to the belt conveyor 13 by its lower end and, by its upper end, is connected to the inlet of said coiled pipe heater 2.
In order to lighten the fabrication, mounting and servicing of such feeder it is desirable, if - said bunker 12 is located within hollow of the heat-insulated housing 1, said coiled pipe heater 2 is located within radial clearance between outside walls of said bunker 12 and said heat-insulated housing 1, and the hollow between outside walls of said bunker 12 and said heat-insulated housing 1 is sealed and connected to the inlet 4 of said vacuum pump 3.
As a rule, said belt conveyor 13 is equipped with -
not designated apart changeable belt, a spreading knife 15 for smoothing of layer of wet dispersed raw material before its suction into said coiled pipe heater 2, and such collector 16 of spillage of said raw material, that is located under said conveyor belt.
Both embodiments of the invention (see Figs 1 and 2) have usually following additional features: at least one flow regulator 17 located on the pipe heater's 2 input and/or output, suitable means 18 for regulable air inflow located on the pipe heater's 2 input, locking and regulating devices 19 that are mounted on each pipe-line, which directly or indirectly connected to the inlet 4 of said vacuum pump 3.
The embodiment, which is shown on Fig.1 and meant for drying of free-flowing wet dispersed raw materials, provides usually that the input part of the pipe heater 2 is connected to said vacuum pump 3 through additional pipe-line 20 equipped with shutoff valve 21. This pipe-line 20 may be communicating with the inlet 4 of said vacuum pump 3 directly or, as a rule, indirectly (i.e. through product receiver 5). Moreover, any described apparatus is equipped: first, with usual means for measure of temperature (based, for example, on thermoelements), residual pressure, current strength and voltage in feed circuit of the resistance-type pipe heater 2, and, second, with a suitable automatic control system.
All these devices are well-known and available in the market. Therefore, they are not described above and designated apart on drawings.
Continuous drying of wet dispersed raw material using described apparatuses includes following steps.
Pre-drying must be realized as:
(1) connection of said pipe heater 2, firstly, to selected current source, and, secondly, to selected feeder of wet dispersed raw material,
(2) closing of means 7 located on input from product receiver 5 (and the shutoff valve 21 on the additional pipe-line 20, if these parts will be used in apparatus shown on Fig.1),
(3) opening of all present flow regulator(s) 17 and locking and regulating device(s) 19,
(4) start of said vacuum pump 3 and exhaustion of air from said pipe heater 2, above- mentioned sealed part of the heat-insulated housing 1 and said product receiver 5 until specified residual pressure could be attained, (5) setting of required operating mode using present controlling means, and
(6) introduction of initial dose of wet dispersed raw material into acting pipe heater 2. In the apparatus shown on Fig.1 free-flowing wet dispersed raw material passes through the bunker12. Therefore, it (at least in part) warmes up from the bunker's 12 wall under the action of heat that is radiating by the coiled pipe heater 2. Further said
raw material gradually spills out on the belt of said conveyor 13. The spreading knife 15 smoothes mobile layer of wet dispersed raw material, which contacts with the suction nipple 14 and, through this nipple, enters into the coiled pipe heater 2 as aerosol produced under action of barometric pressure. If it is necessary, concentration of hard particles in intake aerosol may be regulated by air inflow with means 18.
In the apparatus shown on Fig.2 free-flowing or fluid wet dispersed raw material enters by gravity into the top end of the pipe heater 2.
As wet dispersed raw material passes through the warmed-up by current arbitrary pipe heater 2, it could be heated until temperature that is suitable for evaporation of water, and then, through the crossover pipe-line 8 (Fig .1 ) or 10 (Fig.2), enters into the vapor space of the product receiver 5.
Quick decompression of heated raw material, that occurs at this point of drying process, provides for intensive evaporation of moisture together with other volatile substances and their carry-over through the pipe-line 9 into the liquid-packed ring vacuum-pump 3. Water circulated through said pump 3 absorbs the greater part of steam, and not absorbed steam, air and other volatile admixstures come out in atmosphere.
As dried (or concentrated) product furnishes the receiver 5, its vapor space decreases. When the sensor 6 gives the signal of attainment of the critical level, the means 7 carries out continuous or periodic unloading of product from said receiver 5. It is obviously, that said supply and said unloading must be balanced, if the means 7 operates continuously.
If the pipe heater 2 would be blocked occasionally, supply of processed raw material and unloading of product must be broken off temporarily. Further the pipe heater 2 channel must be cleared up as soon as possible. In particular, necessary clearing may be carried out by at least single short-time throw-over of said heater 2 input onto the inlet 4 of the vacuum pump 3. For example (see Fig.1), the flow regulator 17 located on the pipe heater's 2 output must be closed, and the shutoff valve 21 mounted on the additional pipe-line 20 must be open. Industrial Applicability
Present engineering plants may be easily made the apparatuses according to the invention. The use of their apparatuses for thermal-vacuum drying of arbitrary wet dispersed raw materials could be increase productiveness of drying and decrease energy expences substantially.
Claims
1. Apparatus for drying of wet dispersed raw materials comprising of: a heat-insulated housing, at least one arranged within said housing resistance-type heater of wet dispersed raw material that is equipped with means for its connection to a current source, at least one liquid-packed ring vacuum-pump, which is equipped with an inlet for suction of steam evolved from heating dispersed raw material and an outlet in atmosphere, and at least one product receiver, characterized in that said resistance-type heater is formed as a pipe heater and connected from the inlet to a feeder for supply of wet dispersed raw material, and said product receiver is formed as a separate vacuum-tight housing connected to an outlet of said pipe heater and to the inlet of said vacuum-pump.
2. Apparatus of claim 1 characterized in that said pipe heater is coiled.
3. Apparatus of claim 2 characterized in that said coiled pipe heater is mounted practically upright and connected from below to said feeder for supply of wet dispersed raw material and from above to said product receiver.
4. Apparatus of claim 3 characterized in that said feeder consists of: at least one such communicating with atmosphere bunker, open flow area of which restricts in the line of top-down, at least one practically horizontal belt conveyor that is located under outlet of said bunker, and at least one suction nipple that adjoins to the belt conveyor by its lower end and, by its upper end, is connected to the inlet of said coiled pipe heater.
5. Apparatus of claim 4 characterized in that - said bunker is located within said heat-insulated housing, said coiled pipe heater is located within radial clearance between outside walls of said bunker and said heat-insulated housing, and the hollow between outside walls of said bunker and said heat-insulated housing is sealed and connected to the inlet of said vacuum pump.
6. Apparatus of claim 4 characterized in that said belt conveyor is equipped with - changeable belt, a spreading knife for smoothing of layer of wet dispersed raw material before its suction into said coiled pipe heater, and such collector of spillage of said raw material, that is located under said conveyor belt.
7. Apparatus of claim 2 characterized in that - said coiled pipe heater is mounted practically upright and connected from above to said feeder for supply of wet dispersed raw material and from below to said product receiver which is located under said heat-insulated housing, and said receiver and said housing are connected to the inlet of said vacuum pump.
8. Apparatus of claim 7 characterized in that the outlet end of said coiled pipe heater is equipped with at least one flow regulator.
9. Apparatus according to arbitrary foregoing claim characterized in that each pipeline, which directly or indirectly connected to the inlet of said vacuum pump, is equipped with at least one locking and regulating device.
10. Apparatus of claim 1 characterized in that the input part of said coiled pipe heater is connected to the inlet of said vacuum pump through an additional pipe-line equipped with a shutoff valve.
11. Apparatus of claim 10 characterized in that said additional pipe-line is connected to the inlet of said vacuum pump through said product receiver.
12. Apparatus of claim 1 characterized in that the inlet end of said coiled pipe heater is equipped with an additional means for regulable air inflow.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| UAA200507488 | 2005-07-27 | ||
| UAA200507488A UA81138C2 (en) | 2005-07-27 | 2005-07-27 | Apparatus for thermo-vacuum drying |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007013866A1 true WO2007013866A1 (en) | 2007-02-01 |
Family
ID=35967003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/UA2005/000051 WO2007013866A1 (en) | 2005-07-27 | 2005-11-15 | Apparatus for drying of wet dispersed raw materials |
Country Status (2)
| Country | Link |
|---|---|
| UA (1) | UA81138C2 (en) |
| WO (1) | WO2007013866A1 (en) |
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| DE2800445A1 (en) * | 1978-01-05 | 1979-07-12 | Linde Ag | Drying powdered substances in hot conveying gas - which flows through tube with electrical resistance heating to improve drying effectiveness |
| US4753016A (en) * | 1986-04-08 | 1988-06-28 | Heinz Eichholz | Condensation process and apparatus for water vapor that is under a vacuum |
| DE4408147C1 (en) * | 1994-03-11 | 1995-08-24 | Heinz Eichholz | Vacuum drying process and device for carrying it out |
| US6270708B1 (en) * | 1999-03-12 | 2001-08-07 | Tamer International, Ltd. | Agglomerating and drying apparatus |
-
2005
- 2005-07-27 UA UAA200507488A patent/UA81138C2/en unknown
- 2005-11-15 WO PCT/UA2005/000051 patent/WO2007013866A1/en active Application Filing
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB333416A (en) * | 1929-09-04 | 1930-08-14 | Muller J C & Co | Method of drying tobacco |
| GB601794A (en) * | 1942-03-04 | 1948-05-12 | Meijlom Hoedemaker | Improved device for drying grass and other herbage |
| GB688570A (en) * | 1950-11-03 | 1953-03-11 | Glover & Co Ltd W T | Improved means for heating granular material for the purpose of drying it or otherwise |
| GB807669A (en) * | 1956-05-17 | 1959-01-21 | Bronswerk Nv | Improvements in or relating to the treatment of granular materials by contact with agas |
| US3313035A (en) * | 1966-03-14 | 1967-04-11 | Crawford & Russell Inc | Apparatus for drying particulate material |
| US3521371A (en) * | 1968-06-20 | 1970-07-21 | Automatic Process Control Inc | Method and apparatus for transferring and treating particulated solid materials |
| GB1438583A (en) * | 1973-10-18 | 1976-06-09 | Shulika V P Khazhinsky J N Yak | Vibratory-conveyor furnaces |
| DE2800445A1 (en) * | 1978-01-05 | 1979-07-12 | Linde Ag | Drying powdered substances in hot conveying gas - which flows through tube with electrical resistance heating to improve drying effectiveness |
| US4753016A (en) * | 1986-04-08 | 1988-06-28 | Heinz Eichholz | Condensation process and apparatus for water vapor that is under a vacuum |
| DE4408147C1 (en) * | 1994-03-11 | 1995-08-24 | Heinz Eichholz | Vacuum drying process and device for carrying it out |
| US6270708B1 (en) * | 1999-03-12 | 2001-08-07 | Tamer International, Ltd. | Agglomerating and drying apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| UA81138C2 (en) | 2007-12-10 |
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