GB2282436A - Apparatus for drying tea leaves - Google Patents
Apparatus for drying tea leaves Download PDFInfo
- Publication number
- GB2282436A GB2282436A GB9320295A GB9320295A GB2282436A GB 2282436 A GB2282436 A GB 2282436A GB 9320295 A GB9320295 A GB 9320295A GB 9320295 A GB9320295 A GB 9320295A GB 2282436 A GB2282436 A GB 2282436A
- Authority
- GB
- United Kingdom
- Prior art keywords
- movable
- fixed
- trays
- perforated
- hot air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
- F26B17/02—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
- F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
- F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
- F26B15/14—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by trays or racks or receptacles, which may be connected to endless chains or belts
- F26B15/146—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by trays or racks or receptacles, which may be connected to endless chains or belts applying multiple superimposed tray conveyors, the materials to be dried being dropped onto subsequent conveyor stretches, e.g. by allowing the trays to tilt at one point
-
- 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
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
- F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/20—Teas, i.e. drying, conditioning, withering of tea leaves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Drying Of Solid Materials (AREA)
- Tea And Coffee (AREA)
Abstract
The apparatus is a fluidised bed drier for fermented tea, wherein tea leaves are caused to be predried on one or more moveable leaf-carrying surface(s) composed of hinged trays (4, 5, 6) before being dropped onto a fixed perforated surface (7) disposed below said moveable surface(s) (4, 5, 6) over which they are moved by the hinged trays acting as sweeps. Means are provided for feeding hot air under controlled pressure and in desired direction from below the fixed surface (7). <IMAGE>
Description
APARATUS FOR DRYING TEA LEAVES
The present invention relates to apparatus for drying tea leaves, and, in particular, the invention is aimed at proposing a fluidised bed drying apparatus for both CTC (cut, twisted and curled) as well as orthodox teas.
The drying of tea is most commonly carried out in conventional tray type dryers, which consists of two or three endless bands of perforated trays arranged one above the other, said trays defining leaf carrying surfaces and being housed in enclosed chamber. The trays are so connected to endless chains, driven by power source, that they are able to pivot about an axis parallel to the longer side of the tray. The trays pivot at points near the chain sprockets at the end of each leaf-carrying surface, and thus the tea leaves carried by one surface are caused to be dropped onto the next leaf-carrying surface disposed below the same. Hot air is blown upwards through the perforated trays, which pass through the tea leaves carried by the perforated trays, and, thus, the tea leaves are dried. The drying of tea in this manner is not unsatisfactory, but there are certain disadvantages.One of these is that it is not possible to maintain an even thickness of tea on the trays because the tea is transferred from one drying surface to the other by the pivoting action of the trays, which results in the tea falling in a heap on the lower surface. This results in hot air blowing through spaces on the tray on which there is little or no tea, and, thus, the efficiency of the machine is low.
For the purpose of drying tea, fluidised bed dryer has been developed, and is in use. This consists of an enclosed chamber having within it a fixed grid plate with perforations. Hot air under controlled pressure and desired direction is caused to be supplied from below the said fixed grid plate. ,he tea leaves to be dried are fed at one end of the said plate and by the action of the pressurised hot air the tea leaves loses contact with the porous surface and are supported by the afr.
Thus, a fluidised moving bed is achieved. Intimate mixing of air and the tea leaves is obtained by such fluidisation, and the required removal of moisture is achieved in a time which is varied by the inlet temperature of the hot air and the retention time of the tea leaves in the chamber. The retention time of the tea can be varied by varying air speed and direction.
Although such fluidised bed dryers overcome certain inherent drawbacks of conventional tray type dryers, the latter being low in fuel efficiency compared to such fluidised bed dryers, the hithertoknown fluidised bed dryers pose problems, such aS case hardening in orthodox teas, and, further, elaborate dust collection/refiring systems with high power requirements, are required to be provided in such hithertoknown fluidised bed dryers. It is also experienced that tea with high moisture content is difficult to fluidise, as it chokes the grid plate.
When wet tea is subjected to rapid drying as in conventional fluidised bed dryers, case hardening takes place. This is due to the fact that moisture from the outer surfaces of the tea particles is rapidly removed, but the inner moisture in the core takes more time.
Further, orthodox teas being large in size are difficult to be fluidised unless very large amount of air is used, which, in turn, causes the twist to open up, resulting in flaky teas.
Due to the high air velocity adopted in the hithertolaown fluidised bed dryers, the dust and fluff particles are blown off the bed. This necessitates provision of cyclone dust collectors and refiring of the dust and fluff. For such purpose, the hithertoknown systems consume about 25 KW of power.
The throughput time/drying rate/final moisture content of tea particles, is(are) very difficult to control in the case of the hithertoknown fluidised bed dryers. The throughput time is controlled primarily by the angle of the air jets in the fluidised bed, but this is not easy to do, while the final moisture content of the tea particles is very sensitive to any misadjustment.
The object of the present invention is to provide an improved version of tea drying apparatus, which obviates the aforementioned drawbacks of the hithertoknown fluidised bed dryers, and is much superior in performance, compared to that of the hithertoknown fluidised bed dryers and the conventional tray type dryers as well.
To achieve the above object, the applicants herein have, in particular, taken the following factors, amongst a others, into consideration :
(i) To avoid case hardening of tea particles, the rate
of drying must be longer, compared to what is possible
in the conventional fluidised bed dryers, and, as
such, longer residence time should be afforded to
the tea particles by providing more drying area
compared to that of conventional fluidised bed dryers,
and also causing removal of initial moisture from
the tea particles at comparatively slower rate;
(ii) In order to accommodate drying of orthodox teas
as well, in the same dryer, the moisture content
of the tea particles should be reduced e.g. to
about 1556 before fluidisation.
Accordingly, the present invention provides an apparatus for drying tea leaves comprising an enclosed chamber having one or more movable leaf-carrying perforated surface(s) made of a plurality of slotted/perforated trays, each of the said trays being laterally pivoted at one edge to a pair of parallely spaced endless chains, and the said trays overlapping each other to define the or each said movable leaf-carrying surface, and a fixed perforated surface disposed below the said movable surface(s), and means for feeding hot air under controlled pressure and in desired direction from below the said fixed surface and then through the movable surfaces(s), the trays of the movable surface disposed above the fixed surface being adapted to travel vertically, on the return pass thereof and thus to act as moving sweepers, along the said fixed surface, the arrangement being such that wet tea leaves fed through an inlet provided in the enclosed chamber, to the, or the uppermost of the, movable surface(s) are caused to be carried by the movable surfaces and predried by the hot air, and then dropped onto the said fixed surface, whereby a movable fluidised bed of predried tea leaves is caused to be formed on the said fixed surface, and the tea leaves, duly dried on the fluidised bed, are caused to be discharged from the said fixed surface through an outlet provided in the enclosed chamber.
Preferably, the said fixed perforated surface is constituted by a grid plate.
In a particular embodiment of the present invention, three movable leaf-carrying slotted/perforated surfaces are provided on top of the fixed perforated surface, the trays of the bottom-most of the said movable surfaces being adapted to travel vertically, on the return pass thereof and thus to act as moving sweepers along the said fixed surface.
Preferably, the uppermost movable leaf-carrying surface and that disposed therebelow, are made of standard perforated trays, while the third movable leaf-carrying surface, dust disposed above the fixed perforated surface, is made of slotted/perforated trays with much less opening area, compared to that in the said uppermost surface and that disposed therebelow.
The same hot air is used to dry tea particles in 3 stages; - the hot air first meets the tea in the third, i.e.fluidised zone to remove the final moisture from the tea; then it passes through the second stage where the maximum moisture removal takes place, The air, which is now, say about 900 C, and quite saturated, is passed ; through the uppermost trays carrying wet tea, for maximum use of heat before exhaust.
Because of less slotted/perforated opening area in the movable surface on top of the fixed surface, compared to that in the uppermost surface, higher air velocity is achieved in the said movable surface, and, thus, some fluidisation or bubbling occurs, which may be termed as "semi fluidised zone".
Preferably, the walls of the enclosed chamber are flared upwardly at the zone of the, or the uppermost of the, movable leaf-carrying surface(s). With such arrangement the air velocity is reduced from the third and second stage of drying to the first stage of drying i.e. on the uppermost movable leaf-carrying surface, by increasing the area of the latter.
In conventional tray type dryers the turbulence is comparativel: low at about one metre per second air velocity at the top trays of the dryer. Thus, the first and second pass of the proposed dryer is designed like in conventional dryers mad air escape velocity kept below one metre per second. This eliminates the need for any dust colledtion system. Manufacturers of fluidised bed dryers claim this feature of separation of fluff and dust as a virtue ignoring the fact that conventional fibre extractors cope with fibre extraction easily. It is true that the dryer mouth tea in the case of fluidised bed dryers are cleaner compared to conventional dryers (most, not all, of the fluff/fibres are blown off and have to be separately reprocessed), but when comparison of the tea is made after the fibre extraction no difference is found.It is desirable that air velocity at the uppermost surface is maintained one metre per second at 650 C.
As a preferred embodiment, the rates of travel speed of the movable leaf-carrying surfaces are adapted to be synchronised with each other by separate drive sources, or through gearing arrangement from a common drive source. In the proposed dryer the residence time is controlled mechanically i.e. the rate of travel of the trays. The rate of travel of tea in the fluidised zone in this case is same as the tray travel speed, as the return side trays of the third pass is travelling vertically. This gives a positive controlled movement to the tea in the fluidised bed as these trays function as moving sweepers.
In a particular embodiment, a hot air duct is provided below the enclosed chamber for feeding hot air under controlled pressure from below the said fixed perforated surface, said duct being connected to a source of hot air supply at desired temperature, and dampers being provided in between, for controlling the pressure of the hot air, as desired.
Alternatively, separate ducts may be provided below the said fixed perforated surface, to define separate air feeding zones along the said fixed surface, all said separate ducts being connected to a common supply source of hot air at desired, temperature, through separate dampers, for controlling/varying the pressure of the hot air, as desired, along the said fixed surface.
The nature and scope of the invention will be better understood, from the following description, set out by way of illustration, with reference to the accompanying drawings, wherein :
Fig. 1 diagrammatically shows one embodiment of
the tea drying apparatus according to the present
invention;
Fig. 2 is an end view of the embodiment shown in Fig.1; and
Fig.3 shows in fragmentary view the various passes
of the tea leaves, as and when put to drying in the
embodiment of the apparatus shown in Fig. 1.
Referring to the drawings, the apparatus, proposed by the invention, comprises an enclosed chamber 1 having a tea inlet point 2 and a tea discharge point 3. Three movable leaf-carrying surf aces 4, 5 and 6 are provided on top of a fixed perforated surface 7. The movable leaf-carrying surfaces 4, 5 and 6 are made of a plurality of perforated/ slotted trays, each of the said trays being laterally pivoted at one edge to a pair of parallely spaced endless chains, and the said trays overlapping each other to define each said movable leaf-carrying surface.
Such arrangement being known in the art, the details thereof have neither been shown, nor is it described herein, in order to avoid prolixity As usual, the first pass of the tea leaves carried by the movable surface 4 is from right to left and at the end tea leaves drop on the second pass of the movable surface 5, so as to be carried from left to right, and the tea leaves are then allowed to drop on the movable surface 6 to be carried from the right to left as a third pass. This is clearly shown by arrows in Fig*1 and 3.
As can be seen from Figs. 1 and 3, because of pivoting arrangement of the trays, the trays 8 of the third movable surface 6 travel vertically, on the return pass of the said movable surface 6, so that the said trays 8 act as moving sweepers along the perforated fixed surface 7. Although not shown, the present invention also covers such an embodiment where only one movable leaf-carrying surface is provided over the fixed surface (7), and the trays of such movable leaf-carrying surface act as moving sweepers along the said fixed surface.
The tea particles are allowed to drop from the surface 6 onto the perforated fixed surface 7, which is preferably constituted by grid plate, as adopted in conventional fluidised bed dryers. In the embodiment, as shown in Fig. 1, four separate ducts 9A, 93, 9C and 9D are provided below the fixed perforated surface 7, to define separate air feeding zones along the said fixed surface and all the said separate ducts are connected to a common supply source (10) of hot air at desired temperature, e.g. a fan, and separate dampers/valves 11A, 11B, 11C and 11D provided in between, for controlling/varying the pressure of the hot air, as desired, along the said fixed surface 7. As adopted in known fluidised bed dryers, one common hot air duct may be provided below the fixed surface 7, in stead of separate ducts.
Because of hot air under pressure being fed from below the perforated fixed surface 7, the tea leaves, which fall on the fixed surface 7 from the movable surface 6, lose contact with the porous surface and are supported by the air, and, thus, a fluidised moving bed is achieved. In view of the arrangement, as ambodied in the apparatus according to the present invention, and as illustrated in Fig.1, wet tea leaves fed through inlet 2 to the uppermost movable leaf-carrying surface 4 are caused to be carried by the same and also by the movable surfaces 5 and 6, and finally the tea leaves are allowed to drop at one end of the perforated fixed surface 7. The hot air under controlled pressure, which is fed from below the surface 7, is also allowed to pass through the leaf-carrying surfaces 6, 5 and 4.As a result, the tea leaves which fall finally at one end of the surface 7 are predried by the hot air, and a movable fluidised bed of predried tea leaves is caused to be formed on the fixed surface 7. The tea leaves, duly dried on the said fluidised bed, are caused to be discharged through the discharge outlet 3.
As a preferred embodiment, the trays defining the third leafcarrying surface 6 are provided with less slotted/perforated opening area compared to that in the uppermost leaf-carrying surface (i.e. the first pass-4) and that (5) disposed below the uppermost surface. According to the arrangement of the invention, the same hot air is used to dry tea particles in three stages. The hot air first meets the tea particles in the final stage i.e. the fluidised moving bed on the fixed surface 7, to remove the final moisture from the tea. Then the hot air passes through the third pass (6) where the maximum moisture removal takes place. The air, which is now, say, at about 900 C, and quite saturated, is passed through the second and first leaf-carrying surfaces5 and 4 respectively.The uppermost surface carries wet tea, and, thus, maximum heat is utilised by such wet tea particles before exhaust. Because of less slotted/perforated opening area in the third movable leaf-carrying surface 6, compared to those in surfaces 4 and 5, higher air velocity is achieved in the said third pass 6, and, as a consequence, some fluidisation or bubbling of the tea particles, already predried to a sufficient extent on the movable surfaces 4 and 5, occurs. Thus, a semifluidised zone is achieved on the : third pass 6.
In the first two passes 4 and 5 arrestation of fermenting and preliminary drying of the tea leaves are achieved.
Thereafter, maximum moisture removal takes place in the semi-fluidised or bubbling zone created in the third pass 6, while the tea leaves are finally dried in the fluidised bed created in the perforated fixed surface 7.
As shown clearly in Fig.2, the walls 12 of the enclosed chamber are flared upwardly at the zone of the uppermost movable leafcarrying surface and that disposed therebelow whereby the air velocity is caused to be reduced from the third pass to the upper stages by increasing the area. This eliminates the need for any dust collection system.
It is to be understood that various modifications of the tea-drying apparatus according to this invention are possible within the scope of what has been described hereinbefore and will be claimed hereinafter.
Claims (9)
1. An apparatus for drying tea leaves comprising an enclosed chamber having one or more movable leaf-carrying perforated surface(s) made of a plurality of slotted/per.forated trays, each of the said trays laterally pivoted at one edge to a pair of parallely spaced endless chains, and the said trays overlapping each other to define the or each said movable leafcarrying surface, and a fixed perforated surface disposed below the said movable surface(s), and means for feeding hot air under controlled pressure and in desired direction from below the said fixed surface and then through the movable surface(s), the trays of the movable surface disposed above the fixed surface being adapted to travel vertically, on the return pass thereof and thus to act as moving sweepers1 along the said fixed surface, the arrangement being such that wet tea leaves fed through an inlet provided in the enclosed chamber, to the or the uppermost of the, movable surface(s), are caused to be carried by the movable surface(s) and predried by the hot air, and then dropped onto the said fixed surface, whereby a movable fluidised bed of predried tea leaves is caused to be formed on the said fixed surface, and the tea leaves, duly dried on the fluidised bed, are caused to be discharged from the said fixed surface through an outlet provided in the enclosed chamber.
2. An apparatus according to claim 1, wherein the said fixed perforated surface is constituted by a grid plate.
3. An apparatus according to claim 1 or 2, wherein three movable leaf-carrying slotted/perforated surfaces are provided on top of the fixed perforated surface, the trays of the bottommost of the said movable surfaces being adapted to travel vertically, on the return pass thereof and thus to act as moving sweepers along the said fixed surface.
4. An apparatus according to claim 3, wherein the uppermost movable leaf-carrying surface and that disposed therebelow, are made of standard perforated trays, while the third movable leaf-carrying surface, just disposed above the fixed perforated surface, is made of slotted/perforated trays with much less opening area, compared to that in the said uppermost surface and that disposed therebelow.
5. An apparatus according to any of the preceding claims, wherein the walls of the enclosed chamber are flared upwardly at the zone of the, or the uppermost of the, movable leafcarrying surface(s).
6. An apparatus according to any of claims 3 to 5, wherein the rates of travel speed of the movable leaf-carrying surfaced are adapted to be synchronised with each other by separate drive sources, or through gearing arrangement from a common drive source.
7. An apparatus according to any of the preceding claims, wherein a hot air duct is provided below the enclosed chamber for feeding hot air under controlled pressure from below the said fixed perforated surface, said duct being connected to a source of hot air supply at desired temperature, and dampers being provided in between, for controlling the pressure of the hot air, as desired.
8. An apparatus according to any of claims 1 to 6, wherein separate ducts are provided below the said fixed perforated surface, to define separate air feeding zones along the said fixed surface, all said separate ducts being connected to a common supply source of hpt air at desired temperature, through separate dampers, for controlling/varying the pressure of the hot air as desired, along the said fixed surface.
9. An apparatus for drying tea leaves substantially as hereinbefore described with particular reference to, and as illustrated in the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9320295A GB2282436A (en) | 1993-10-01 | 1993-10-01 | Apparatus for drying tea leaves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9320295A GB2282436A (en) | 1993-10-01 | 1993-10-01 | Apparatus for drying tea leaves |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9320295D0 GB9320295D0 (en) | 1993-11-17 |
| GB2282436A true GB2282436A (en) | 1995-04-05 |
Family
ID=10742863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9320295A Withdrawn GB2282436A (en) | 1993-10-01 | 1993-10-01 | Apparatus for drying tea leaves |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2282436A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1925413A2 (en) | 2006-11-21 | 2008-05-28 | Anton Heggenstaller GmbH | Method and extrusion press for manufacturing extrusion press products |
| CN102226637A (en) * | 2011-04-22 | 2011-10-26 | 李功民 | Drying device with reciprocating link plate and method |
| CN105091550A (en) * | 2015-09-09 | 2015-11-25 | 朱顺华 | Tea drying device hydraulically driven to life and having airflow filter screen |
| CN105091539A (en) * | 2015-09-09 | 2015-11-25 | 赵连云 | Tea drying device automatically controlled and provided with airflow filtering net |
| CN105115273A (en) * | 2015-09-09 | 2015-12-02 | 诸暨市洋诚日用品有限公司 | Noise reduction type tea drying device |
| CN108534488A (en) * | 2016-08-30 | 2018-09-14 | 陈晓斌 | A kind of intelligent tea machine of tea processing processing |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110926163B (en) * | 2019-11-19 | 2021-07-02 | 国网浙江省电力有限公司湖州供电公司 | Energy-saving drying-machine is used to tealeaves |
| CN110736322A (en) * | 2019-11-27 | 2020-01-31 | 贵州省凤冈县永田露茶业有限公司 | body device for drying and screening kinds of tea leaves |
| CN112197509A (en) * | 2020-09-21 | 2021-01-08 | 高瑰丽 | Pneumatic tea leaf drying method |
| CN112197527B (en) * | 2020-10-14 | 2022-02-18 | 桑植县澧水韵茶叶有限公司 | Air-floating tea leaf drying method |
| CN112556391A (en) * | 2020-12-09 | 2021-03-26 | 江西倍得力生物工程有限公司 | Traditional chinese medicine production is with quick air-dry device of chicken's gizzard-membrane |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3815255A (en) * | 1971-10-08 | 1974-06-11 | Yamato Sanko Mfg Ltd | Fluidized bed dryer |
| GB2239305A (en) * | 1989-12-23 | 1991-06-26 | Myron Grant Hampton | Drying tea |
-
1993
- 1993-10-01 GB GB9320295A patent/GB2282436A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3815255A (en) * | 1971-10-08 | 1974-06-11 | Yamato Sanko Mfg Ltd | Fluidized bed dryer |
| GB2239305A (en) * | 1989-12-23 | 1991-06-26 | Myron Grant Hampton | Drying tea |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1925413A2 (en) | 2006-11-21 | 2008-05-28 | Anton Heggenstaller GmbH | Method and extrusion press for manufacturing extrusion press products |
| EP1925413A3 (en) * | 2006-11-21 | 2009-04-01 | Anton Heggenstaller GmbH | Method and extrusion press for manufacturing extrusion press products |
| CN102226637A (en) * | 2011-04-22 | 2011-10-26 | 李功民 | Drying device with reciprocating link plate and method |
| CN102226637B (en) * | 2011-04-22 | 2013-10-30 | 李功民 | Drying device with reciprocating link plate and method |
| CN105091550A (en) * | 2015-09-09 | 2015-11-25 | 朱顺华 | Tea drying device hydraulically driven to life and having airflow filter screen |
| CN105091539A (en) * | 2015-09-09 | 2015-11-25 | 赵连云 | Tea drying device automatically controlled and provided with airflow filtering net |
| CN105115273A (en) * | 2015-09-09 | 2015-12-02 | 诸暨市洋诚日用品有限公司 | Noise reduction type tea drying device |
| CN105091539B (en) * | 2015-09-09 | 2017-06-16 | 浙江工商职业技术学院 | It is a kind of to realize automatically controlling and with the tea drying device of airflow filtering net |
| CN108534488A (en) * | 2016-08-30 | 2018-09-14 | 陈晓斌 | A kind of intelligent tea machine of tea processing processing |
| CN108534488B (en) * | 2016-08-30 | 2019-11-22 | 福建硒来乐生态农业有限公司 | A kind of intelligent tea machine of tea processing processing |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9320295D0 (en) | 1993-11-17 |
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