EP0218733A2 - Process and equipment for quick drying of ceramics - Google Patents
Process and equipment for quick drying of ceramics Download PDFInfo
- Publication number
- EP0218733A2 EP0218733A2 EP85112264A EP85112264A EP0218733A2 EP 0218733 A2 EP0218733 A2 EP 0218733A2 EP 85112264 A EP85112264 A EP 85112264A EP 85112264 A EP85112264 A EP 85112264A EP 0218733 A2 EP0218733 A2 EP 0218733A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- oven
- drying
- vacuum
- air
- pipes
- 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.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic articles
-
- 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
Definitions
- Dryers for ceramics of the static type under air stream are known, or of the type where the pieces to be dried are placed in an oven, the walls of which are surrounded by heat radiating surfaces, fed with electric current or heated liquid. It is also known the difficulty of drying ceramics of a certain size in a short time.
- process of the present invention allows to match the physical condition of the material during the various stages of drying (drying together with shrinkage or drying alone).
- the process according to the present invention consists in causing evaporation of water to be removed from the pieces by placing them in a heated ambient in presence of hot air adapted to reach all the most concealed recesses of the materials to be dried and then by placing the ambient under a rather high vacuum.
- First stage heating of the piece introduced in a static or slightly ventilated room, at a pressure equal to that of the externalenvironment.
- the internal room tends to becume steam saturated and therefore it occurs a heating in a nearly saturated ambient and with limited evaporation, this lasting almost up to the end of the shrinkage phase.
- Second stage ambient is put under vacuum at about 380 Torr (500 millibars) and at the same time inlet of ambient air is effected through a device adapted to cause inside the oven a motion of highly turbulent air, so that the temperature of the material to be processed is kept above that of water evaporation under the above mentioned conditions.
- Air may be preheated or it is heated through the supply ducts which are arranged inside the drying oven. Air motion is automatically caused by the high pressure differential between internal room and external environment. Duration and use of each stage depends from the shape of the article, the type of material and humidity contents with which the article enters the dryer.
- the first stage is particularly suitable for the most difficult pieces to be dried, which must be shrunk, but it may be dispensed with in case it is not indispensable, either for the shape of the article, or when the humidity contents of the piece at its entrance in the oven is already lower than that causing the contemporaneous shrinkage in the particular article and material involved.
- the second stage which is the most efficient, is that allowing to decrease strongly the drying time because of the high turbulence caused by the inlet device where air reaches a speed close to the sound velocity, so that even the most recessed zones of the article are touched and dangerous zones of concentrated drying are avoided.
- the third stage allows to complete quickly the drying cycle because of the increased vacuum, so as to remove even the last spots of residual humidity.
- the second solution is particularly suitable for plants having a high output, combining in a single operation the first two stages at ambient pressure and employing two separate rooms, namely:
- Second stage The pieces are transferred to a second tunnel provided with heat radiating walls where a rather high vacuum is obtained, of about 60-45 Torr.
- the reference numeral 1 is a dryer for ceramic material of known type as to form and shape, substantially comprising a metal inner structure 2 with parallelepipedal section in the form of a tunnel, externally covered by . an insulating shell 3 enclosed by a protective envelope 4.
- a set of radiating panels 5 of electric type or fed with diathermic oil, so as to give the heat required for evaporation of water contained in the ceramic products to be dried.
- the dryer is also provided in its lower part with rails 6 and 7 on which trolleys 8 are running, on which the pieces 9 to be dried are placed, as well as with a door 10 which is closed once the dryer is loaded, and the foregoing is the known prior art structure.
- a pipe 11 is inserted, in communication at one end with the interior of the oven and connected at the other end with a vacuum pump 12.
- Even more than one pump may be provided for a better distribution of suction in the oven, or for better commensuration of suction or vacuum level to the type of material to be processed, so as to avoid use of a too large apparatus when a smaller vacuum and/or suction is required.
- the vertical pipes 13, 16, 18 are connected at their upper end with the longitudinal manifold 20 and the pipes 14, 15, 17 with the longitudinal manifold 21, said manifold being in turn connected each other by a single cross pipe 22 which sucks air from atmosphere through the upright pipe 23.
- Sucked air may be preheated, if necessary, but it is generally sufficient the heating obtained by the simple passage in the pipes delivering it inside the oven.
- one of the three stages may be dispensed with.
- the plant consists of two indipendent elements 101 and 201 arranged in series.
- the element 101 the first stage of quick drying with shinkage takes place, and in the element 201 occurs the second stage of final drying without shrinkage.
- the element 101 is substantially a dryer for ceramic materials of known type as to shape and form, essentially comprising an internal metal structure 102 of parallelepipedal section in the form of a tunnel, externally covered with an insulating shell 103 enclosed in a protective envelope 104.
- an internal metal structure 102 of parallelepipedal section in the form of a tunnel, externally covered with an insulating shell 103 enclosed in a protective envelope 104.
- blowing pipes 105, 105' etc. provided with nozzles adapted to produce a laminar blow.
- the dryer is also provided in its lower part with rails 106, 107 on which trolleys 108 are running, on which the pieces 109 to be dried are placed.
- the tunnel is closed at its ends by moving lamellar elements 110, adapted to allow passage therethrough of the trolleys with the material and at the same time a certain air sealing.
- blowing pipes are connected to one or more manifolds 111 in turn connected to one or more fans 112 adapted to suck hot air from a suitable source and to supply it to the blowing pipes 105, 105'.
- the relative position between blowing pipes and material to be dried does not remain stationary, but on the contrary an alternative motion is imparted either to the blowing pipes or to the trolleys during the whole drying time which takes place in the short term of about one hour, the motion having a width equal to the distance between two blowing pipes in order to sweep with the blown air the material to be dried.
- the device for effecting the alternative motion is not shown in the drawings, but there are several devices of different mechanical, pneumatic or hydraulic type which are well known to a man skilled in the art.
- the element 201 is also substantially a drying oven for ceramic materials of known type as to shape and form, essentially comprising an internal metal structure 202 of parallelepipedal section in the form of a tunnel, externally covered by an insulating shell 203 enclosed in a protective envelope 204.
- an internal metal structure 202 of parallelepipedal section in the form of a tunnel externally covered by an insulating shell 203 enclosed in a protective envelope 204.
- a set of radiating panels 205 of electric type or heated with diathermic oil, so as to produce the heat required for evaporation of water contained in the ceramic products to be dried.
- the dryer is also provided in its lower part with rails 106 and 107 on which run the trolley 108 carrying the pieces 109 to be dried and with the doors 206 and 207 which are closed once the dryer is loaded.
- a pipe 208 communicating at one end with the oven interior and at the other end with a vacuum pump 209.
- Even more than one pump may be provided for a better distribution of suction in the oven, or for better commensuration of suction or vacuum level to the type of material to be processed, so as to avoid use of a too large apparatus when a smaller vacuum and/or suction is required.
- This particular arrangement is such, that during operation of the system,the trolleys are transferred to the second drying oven 201, after completion of the first stage in the first element 101.
- Air-tight doors 206 and 207 are closed, the heating device 205 and the vacuum pump 209 are actuated and at the same time additional trolleys are introduced in the first dryer 101.
- the pump is stopped, doors are open and the oven is unloaded so as to be ready for a new operative cycle.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
- Dryers for ceramics of the static type under air stream are known, or of the type where the pieces to be dried are placed in an oven, the walls of which are surrounded by heat radiating surfaces, fed with electric current or heated liquid. It is also known the difficulty of drying ceramics of a certain size in a short time.
- It is further known that drying of ceramics occurs in two discrete stages, the first in which the piece still contains a considerable amount of water and to moisture removal corresponds a shrink and therefore a motion of the mass proportionate to the decrease of water contents, and the second in which there is only a moisture decrease until the predetermined degree of drying is reached.
- It is also known that in the known dryers, the drying times are very long (minimum time up to now achieved is 24 hours), even if some measures were taken, such as to put under light vacuum the drying chamber in order to accelerate water evaporation from the products.
- With the system according to the present invention it is possible to greatly reduce drying time of the most complex ceramic products, such as for instance the sanitary fixtures, in the sense that tests carried out showed that it is possible to dry sanitary articles of a weight of 20 kg each and with a humidity of 16%, reducing it to a 1% contents in 2-3 hours without formation of cracks or faults in the article.
- Furthermore the process of the present invention allows to match the physical condition of the material during the various stages of drying (drying together with shrinkage or drying alone).
- The process according to the present invention consists in causing evaporation of water to be removed from the pieces by placing them in a heated ambient in presence of hot air adapted to reach all the most concealed recesses of the materials to be dried and then by placing the ambient under a rather high vacuum.
- The process provides for two possible solutions:
- the first consists of three sequential stages, namely:
- First stage: heating of the piece introduced in a static or slightly ventilated room, at a pressure equal to that of the externalenvironment. The internal room tends to becume steam saturated and therefore it occurs a heating in a nearly saturated ambient and with limited evaporation, this lasting almost up to the end of the shrinkage phase.
- Second stage: ambient is put under vacuum at about 380 Torr (500 millibars) and at the same time inlet of ambient air is effected through a device adapted to cause inside the oven a motion of highly turbulent air, so that the temperature of the material to be processed is kept above that of water evaporation under the above mentioned conditions.
- Third stage: air inlet is shut off and vacuum increased up to a pressure of about 45 Torr (60 millibars).
- Air may be preheated or it is heated through the supply ducts which are arranged inside the drying oven. Air motion is automatically caused by the high pressure differential between internal room and external environment. Duration and use of each stage depends from the shape of the article, the type of material and humidity contents with which the article enters the dryer.
- For instance the first stage is particularly suitable for the most difficult pieces to be dried, which must be shrunk, but it may be dispensed with in case it is not indispensable, either for the shape of the article, or when the humidity contents of the piece at its entrance in the oven is already lower than that causing the contemporaneous shrinkage in the particular article and material involved.
- The second stage, which is the most efficient, is that allowing to decrease strongly the drying time because of the high turbulence caused by the inlet device where air reaches a speed close to the sound velocity, so that even the most recessed zones of the article are touched and dangerous zones of concentrated drying are avoided.
- The third stage allows to complete quickly the drying cycle because of the increased vacuum, so as to remove even the last spots of residual humidity.
- To sum up, in the first stages at ambient pressure one obtains drying with shinkage, firstly by heat and high ventilation and then by heat and turbulent high ventilation so as to reach all the parts of the pieces to be dried, this being obtained by putting the drying tunnel under light vacuum, while in the third stage one obtains residual drying without shrinkage in a high vacuum ambient.
- The second solution is particularly suitable for plants having a high output, combining in a single operation the first two stages at ambient pressure and employing two separate rooms, namely:
- First stage: blowing air at a certain speed into the tunnel operating at ambient pressure, this being not obtained by putting the tunnel under vacuum (which required structures of considerable strength), but by hitting the various groups of pieces to be dried wih several hot air blades blown from the outside and by causing said air blades to be moved back and forth in respect of the pieces, which can be carried out either keeping the air jets stationary and moving the pieces back and forth in respect of the air blades, or giving the alternative motion to the nozzles generating the air blades. In this way the drying stage with shrinkage is obtained in the first tunnel in about one hour.
- Second stage: The pieces are transferred to a second tunnel provided with heat radiating walls where a rather high vacuum is obtained, of about 60-45 Torr.
- As a non limiting example only, there are now described two embodiments of two plants made for carrying out the process of the invention, according to the two above mentioned systems, illustrated in the sheets of accompanying drawings, in which:
- Fig. 1 is a perspective view of an oven according to the first solution of the process;
- Fig. 2 is a diagram of the pipes delivering air to the oven in order to give the required turbulence; and
- Fig. 3 is perspective view, partially broken to show the interior, of the two tunnels according to the second solution of the process.
- With reference now to Fig. 1, the reference numeral 1 is a dryer for ceramic material of known type as to form and shape, substantially comprising a metal inner structure 2 with parallelepipedal section in the form of a tunnel, externally covered by . an insulating shell 3 enclosed by a protective envelope 4. Along the inner walls of the tunnel structure 2 there is a set of radiating
panels 5 of electric type or fed with diathermic oil, so as to give the heat required for evaporation of water contained in the ceramic products to be dried. The dryer is also provided in its lower part withrails 6 and 7 on which trolleys 8 are running, on which the pieces 9 to be dried are placed, as well as with adoor 10 which is closed once the dryer is loaded, and the foregoing is the known prior art structure. - In order to carry out the process of the invention, in a suitable wall of the drying oven a pipe 11 is inserted, in communication at one end with the interior of the oven and connected at the other end with a
vacuum pump 12. - Even more than one pump may be provided for a better distribution of suction in the oven, or for better commensuration of suction or vacuum level to the type of material to be processed, so as to avoid use of a too large apparatus when a smaller vacuum and/or suction is required.
- Furthermore, always in order to carry out the process according to the invention, inside the oven, as shown in Fig. 2, at intervals depending upon the size and shape of the pieces to be dried, there is a set of
vertical pipes injection nozzles 19, but oriented in such a way that each set of nozzles is arranged opposite to the sets of nozzles arranged in front of it or aside it. This particular arrangement is such that in operation the air jets cause a strong turbulence around the material introduced in the oven, reaching every recessed portion thereof. - The
vertical pipes longitudinal manifold 20 and thepipes longitudinal manifold 21, said manifold being in turn connected each other by asingle cross pipe 22 which sucks air from atmosphere through theupright pipe 23. - Sucked air may be preheated, if necessary, but it is generally sufficient the heating obtained by the simple passage in the pipes delivering it inside the oven.
- According to the characteristics and the wet condition of the material entering the dryer, one of the three stages, and generally the first one, may be dispensed with.
- An embodiment of a plant made for carrying out the variant of the process according to the invention is now being described always as a non limiting example only.
- With reference now to Fig. 3, the plant consists of two
indipendent elements element 101 the first stage of quick drying with shinkage takes place, and in theelement 201 occurs the second stage of final drying without shrinkage. - The
element 101 is substantially a dryer for ceramic materials of known type as to shape and form, essentially comprising aninternal metal structure 102 of parallelepipedal section in the form of a tunnel, externally covered with aninsulating shell 103 enclosed in aprotective envelope 104. Inside the tunnel, at a distance approximately equal to the length of the material carrying trolleys, all around the internal perimeter of the tunnel there are blowingpipes 105, 105' etc. provided with nozzles adapted to produce a laminar blow. - The dryer is also provided in its lower part with
rails trolleys 108 are running, on which thepieces 109 to be dried are placed. The tunnel is closed at its ends by movinglamellar elements 110, adapted to allow passage therethrough of the trolleys with the material and at the same time a certain air sealing. - All the blowing pipes are connected to one or
more manifolds 111 in turn connected to one ormore fans 112 adapted to suck hot air from a suitable source and to supply it to the blowingpipes 105, 105'. - In order to obtain a quick drying without cracks of the products introduced in the oven during this first stage in which to the evaporation of water contained in the products corresponds also a material shrinkage, the relative position between blowing pipes and material to be dried does not remain stationary, but on the contrary an alternative motion is imparted either to the blowing pipes or to the trolleys during the whole drying time which takes place in the short term of about one hour, the motion having a width equal to the distance between two blowing pipes in order to sweep with the blown air the material to be dried. The device for effecting the alternative motion is not shown in the drawings, but there are several devices of different mechanical, pneumatic or hydraulic type which are well known to a man skilled in the art.
- The
element 201 is also substantially a drying oven for ceramic materials of known type as to shape and form, essentially comprising aninternal metal structure 202 of parallelepipedal section in the form of a tunnel, externally covered by aninsulating shell 203 enclosed in aprotective envelope 204. Along the inner walls of the tunnel structure there is a set of radiatingpanels 205 of electric type or heated with diathermic oil, so as to produce the heat required for evaporation of water contained in the ceramic products to be dried. - The dryer is also provided in its lower part with
rails trolley 108 carrying thepieces 109 to be dried and with thedoors - In order to carry out the second stage of the variant of the process, in a suitable wall of the drying oven there is inserted a
pipe 208 communicating at one end with the oven interior and at the other end with avacuum pump 209. - Even more than one pump may be provided for a better distribution of suction in the oven, or for better commensuration of suction or vacuum level to the type of material to be processed, so as to avoid use of a too large apparatus when a smaller vacuum and/or suction is required.
- Furthermore, always in order to carry out the process according to the invention, inside the oven, as shown in Fig. 2, at intervals depending upon the size and shape of the pieces to be dried, there is a set of
vertical pipes injection nozzles 19, but oriented in such a way that each set of nozzles is arranged opposite to the sets of nozzles arranged in front of it or aside it. This particular arrangement is such that in operation the air jets cause a strong turbulence around the material introduced in the oven, reaching every recessed portion thereof. - This particular arrangement is such, that during operation of the system,the trolleys are transferred to the
second drying oven 201, after completion of the first stage in thefirst element 101. - Air-
tight doors heating device 205 and thevacuum pump 209 are actuated and at the same time additional trolleys are introduced in thefirst dryer 101. When the drying operation lasting about two hours is completed, the pump is stopped, doors are open and the oven is unloaded so as to be ready for a new operative cycle. - In view of the speed with which in the dryers according to the present invention the complete drying of the pieces occurs, although they are drying plants of the static type, they were designed in the form of a tunnel, i.e. provided with doors at each end of the oven, so that the wet materials enter from one door at one end and go out from a second door at the other end of the tunnel, in order to create an almost continuous flow of material, and to allow in this way to insert the dryer of the present invention in a continuous production line.
- It is to be understood that the foregoing embodiments were described only for a non limiting illustrative purpose, so that many variations may be devised to put into practice the proposed solutions of the system of the invention.
Claims (12)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2214485 | 1985-09-13 | ||
IT22144/85A IT1185911B (en) | 1985-09-13 | 1985-09-13 | PROCEDURE FOR THE QUICK DRYING OF CERAMICS AND PLANT TO REALIZE IT |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0218733A2 true EP0218733A2 (en) | 1987-04-22 |
EP0218733A3 EP0218733A3 (en) | 1988-04-20 |
EP0218733B1 EP0218733B1 (en) | 1991-01-23 |
Family
ID=11192146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85112264A Expired - Lifetime EP0218733B1 (en) | 1985-09-13 | 1985-09-27 | Process and equipment for quick drying of ceramics |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0218733B1 (en) |
DE (1) | DE3581542D1 (en) |
IT (1) | IT1185911B (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0423377A1 (en) * | 1989-09-15 | 1991-04-24 | International Business Machines Corporation | Method of and apparatus for drying articles |
WO1994005961A1 (en) * | 1992-09-09 | 1994-03-17 | Aichelin Gmbh | Process and device for drying industrial casks |
EP0639747A1 (en) * | 1993-08-21 | 1995-02-22 | Dürr GmbH | Process and apparatus for drying a cleaned workpiece which has been treated with a cleaning fluid |
EP1314521A1 (en) * | 2001-11-22 | 2003-05-28 | Tecnicas de Vacio, S.L. | Method and device for drying ceramic tiles |
EP2098811A2 (en) * | 2008-03-07 | 2009-09-09 | Hans Lingl Anlagenbau und Verfahrenstechnik GmbH & Co. KG | Tunnel dryer for drying preforms, with air entry holes in cross-spaced and opposite arrangement, and tunnel module for a tunnel dryer |
EP2264261A1 (en) * | 2009-06-19 | 2010-12-22 | Miquel Ventura Monsó | Post with ceramic core and method to obtain ceramic pieces to form said core |
CN114800820A (en) * | 2022-04-29 | 2022-07-29 | 重庆安都陶瓷有限公司 | Automatic drying system for wine jar pottery jar blank |
CN116238036A (en) * | 2023-03-02 | 2023-06-09 | 保靖县金锋陶瓷有限责任公司 | Dryer for glazing ceramic wine bottle |
CN117085810A (en) * | 2023-09-05 | 2023-11-21 | 国环高科(北京)环保科技有限公司 | Full-automatic soil grinding, drying and screening system |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108253737A (en) * | 2018-03-07 | 2018-07-06 | 吴江市松陵电器设备有限公司 | A kind of tunnel type drying device and method being placed in workpiece in vacuum box |
CN112622011B (en) * | 2020-12-18 | 2022-04-26 | 安徽晶宫绿建集团有限公司 | Three-dimensional steam curing kettle is used in concrete prefabricated component production |
Citations (10)
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FR489332A (en) * | 1918-03-19 | 1919-01-22 | Vincent De Messimy | Method and apparatus for dehydrating vegetables, fruits and the like |
US1415623A (en) * | 1918-10-12 | 1922-05-09 | Vacuum Company | Method of drying goods |
FR582392A (en) * | 1923-09-04 | 1924-12-17 | Beirnaert Droulers & Toulemond | Continuous dryer for ceramic products |
GB277135A (en) * | 1926-06-25 | 1927-09-15 | Drying Systems Inc | Improvements in drying devices |
US2802281A (en) * | 1955-01-27 | 1957-08-13 | Charles F Stone | Apparatus for seasoning green wood |
DE1202732B (en) * | 1961-01-11 | 1965-10-07 | Siemens Ag | Drying process with alternating evacuation of the drying room |
FR2173958A1 (en) * | 1972-01-14 | 1973-10-12 | Tweedy Of Burnley Ltd | |
FR2484068A1 (en) * | 1980-06-10 | 1981-12-11 | Pagnozzi Vincenzo | ASSEMBLY FOR DRYING SOLID MATERIALS, PARTICULARLY WOOD |
US4354827A (en) * | 1981-04-17 | 1982-10-19 | Midland-Ross Corporation | Process and device for improving heat exchange in furnaces heated by radiant heaters |
DE3104499A1 (en) * | 1981-02-09 | 1982-10-28 | Rosenthal Ag, 8672 Selb | Vacuum system for the drying of ceramic mouldings |
-
1985
- 1985-09-13 IT IT22144/85A patent/IT1185911B/en active
- 1985-09-27 DE DE8585112264T patent/DE3581542D1/en not_active Expired - Fee Related
- 1985-09-27 EP EP85112264A patent/EP0218733B1/en not_active Expired - Lifetime
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR489332A (en) * | 1918-03-19 | 1919-01-22 | Vincent De Messimy | Method and apparatus for dehydrating vegetables, fruits and the like |
US1415623A (en) * | 1918-10-12 | 1922-05-09 | Vacuum Company | Method of drying goods |
FR582392A (en) * | 1923-09-04 | 1924-12-17 | Beirnaert Droulers & Toulemond | Continuous dryer for ceramic products |
GB277135A (en) * | 1926-06-25 | 1927-09-15 | Drying Systems Inc | Improvements in drying devices |
US2802281A (en) * | 1955-01-27 | 1957-08-13 | Charles F Stone | Apparatus for seasoning green wood |
DE1202732B (en) * | 1961-01-11 | 1965-10-07 | Siemens Ag | Drying process with alternating evacuation of the drying room |
FR2173958A1 (en) * | 1972-01-14 | 1973-10-12 | Tweedy Of Burnley Ltd | |
FR2484068A1 (en) * | 1980-06-10 | 1981-12-11 | Pagnozzi Vincenzo | ASSEMBLY FOR DRYING SOLID MATERIALS, PARTICULARLY WOOD |
DE3104499A1 (en) * | 1981-02-09 | 1982-10-28 | Rosenthal Ag, 8672 Selb | Vacuum system for the drying of ceramic mouldings |
US4354827A (en) * | 1981-04-17 | 1982-10-19 | Midland-Ross Corporation | Process and device for improving heat exchange in furnaces heated by radiant heaters |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0423377A1 (en) * | 1989-09-15 | 1991-04-24 | International Business Machines Corporation | Method of and apparatus for drying articles |
US5133136A (en) * | 1989-09-15 | 1992-07-28 | International Business Machines Corporation | Method of and apparatus for drying articles |
US5513446A (en) * | 1992-09-07 | 1996-05-07 | Aichelin Gmbh | Method and apparatus for drying industrial barrels |
WO1994005961A1 (en) * | 1992-09-09 | 1994-03-17 | Aichelin Gmbh | Process and device for drying industrial casks |
EP0639747A1 (en) * | 1993-08-21 | 1995-02-22 | Dürr GmbH | Process and apparatus for drying a cleaned workpiece which has been treated with a cleaning fluid |
EP1314521A1 (en) * | 2001-11-22 | 2003-05-28 | Tecnicas de Vacio, S.L. | Method and device for drying ceramic tiles |
EP2098811A2 (en) * | 2008-03-07 | 2009-09-09 | Hans Lingl Anlagenbau und Verfahrenstechnik GmbH & Co. KG | Tunnel dryer for drying preforms, with air entry holes in cross-spaced and opposite arrangement, and tunnel module for a tunnel dryer |
EP2098811A3 (en) * | 2008-03-07 | 2014-08-27 | Hans Lingl Anlagenbau und Verfahrenstechnik GmbH & Co. KG | Tunnel dryer for drying preforms, with air entry holes in cross-spaced and opposite arrangement, and tunnel module for a tunnel dryer |
EP2264261A1 (en) * | 2009-06-19 | 2010-12-22 | Miquel Ventura Monsó | Post with ceramic core and method to obtain ceramic pieces to form said core |
CN114800820A (en) * | 2022-04-29 | 2022-07-29 | 重庆安都陶瓷有限公司 | Automatic drying system for wine jar pottery jar blank |
CN114800820B (en) * | 2022-04-29 | 2024-01-23 | 重庆安都陶瓷有限公司 | Wine jar gallipot embryo body automatic drying system |
CN116238036A (en) * | 2023-03-02 | 2023-06-09 | 保靖县金锋陶瓷有限责任公司 | Dryer for glazing ceramic wine bottle |
CN116238036B (en) * | 2023-03-02 | 2023-10-03 | 保靖县金锋陶瓷有限责任公司 | Dryer for glazing ceramic wine bottle |
CN117085810A (en) * | 2023-09-05 | 2023-11-21 | 国环高科(北京)环保科技有限公司 | Full-automatic soil grinding, drying and screening system |
CN117085810B (en) * | 2023-09-05 | 2024-02-09 | 国环高科(北京)环保科技有限公司 | Full-automatic soil grinding, drying and screening system |
Also Published As
Publication number | Publication date |
---|---|
IT1185911B (en) | 1987-11-18 |
IT8522144A0 (en) | 1985-09-13 |
EP0218733A3 (en) | 1988-04-20 |
DE3581542D1 (en) | 1991-02-28 |
EP0218733B1 (en) | 1991-01-23 |
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