US3757427A - Method and apparatus for drying solvents - Google Patents

Method and apparatus for drying solvents Download PDF

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Publication number
US3757427A
US3757427A US00187101A US3757427DA US3757427A US 3757427 A US3757427 A US 3757427A US 00187101 A US00187101 A US 00187101A US 3757427D A US3757427D A US 3757427DA US 3757427 A US3757427 A US 3757427A
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oxidation
oven
gases
stream
solvent
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D Wilkinson
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B&K Machinery International Ltd
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B&K Machinery International Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases

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  • ABSTRACT SOLVENTS A method of drying a solvent type coating on a surface
  • the specification also discloses apparatus suitable for the practising of the method.
  • the present invention relates to a method of drying a solvent type coating such as paint, adhesive, and the like after application thereof to a workpiece, and to apparatus therefor.
  • the oven had to be much longer than was economically feasible, or alternatively the rate of gas flow through the oven had to be still further increased, out of all proportion to the economics of the system.
  • the rate of gas flow through the oven had to be still further increased, out of all proportion to the economics of the system.
  • the size of the burner or catalytic converter was correspondingly increased, and its operation became even more uneconomic.
  • the very large gas flows involved, to make the system economic resulted in a substantial temperature drop across the oven, requiring additional and excessive heat input from the sources within the oven, and also requiring additional heat input prior to introduction of the gases into the oven, to bring them up to a reasonable operating temperature.
  • the concentrations of solvent vapours present in the total gas mass passing through the system is in the order of a small fraction of a percentage, and is'in any event at a predetermined margin below the accepted maximum safety. limits laid down for most of solvents concerned.
  • the normal lower explosive limit of concentration of toluol vapours in air is somewhere in the region of about 1.3 percent.
  • concentration should be kept at somewhere in the region of about one-quarter of the lower explosive limit, i.e., about 0.3 of one percent concentration.
  • the present invention seeks to overcome these various disadvantages, and to greatly increase the efficiency of such systems, while reducing or substantially eliminating the requirement for additional heating sources within the oven, by providing a system in which the gases within the oven are continuously exhausted, and the effluent gases leaving the oven are then separated into two streams, namely, a recycle stream and an oxidation stream, and in which the oxidation stream is then passed through an oxidizer where the solvent vapours in the oxidation stream are then oxidized or burned.
  • the recycle stream of unburnt effluent gases is then recycled directly into the oven once more without passing through the burner at all.
  • the combustion gases leaving the burner are then separated into two streams, and one stream is vented to atmosphere.
  • the other stream namely a return stream, is then passed into the oven again together with the recycle stream of unburnt effluent gases.
  • Sufficient fresh air is drawn into the system, preferably through a heat exchanger heated by the waste combustion gases, and such additional make-up air is then passed directly into the oven, where it mixes with the incoming return stream of combustion gases, and the incoming recycle stream of unbumt effluent gases.
  • a relatively smaller portion of the effluent gases are bled off to form the oxidation stream, and are passed through the burner for oxidation of the solvent vapours, and are simultaneously raised to a very substantially elevated temperature.
  • the return stream portion of the high temperature combustion gases leaving the burner is then sufficient when mixed with the recycled gases and the fresh incoming air, to maintain the gas mixture within the oven at or within a predetermined elevated temperature range sufficient to procure rapid evaporation of the solvent vapours, generally speaking without the requirement'for any additional heat input into the oven whatever.
  • Heating of the gas stream entering the oven, and evaporation of the solvent and curing of the coating on the workpiece is thereby achieved using only a relatively minor outside heat input, the major heat source being the heat resulting from the oxidation of the solvent vapours in the combustion stream fraction of the effluent gases.
  • the effluent gases leaving the oven contain a maximum percentage of solvent vapour, at or close to the maximum engineering standards for such solvent, thereby ensuring that the entire system works at its maximum efficiency within safety requirements.
  • the effluent gases leaving, the oven are continuously monitored by any suitable gas analyser to determine at any time the solvent vapour content of such effluent gases to ensure that such safety limits are not exceeded.
  • the invention contemplates the provision of suitable apparatus for the practice of such method including an oven, means for flowing gases into said oven, and distributing them over the workpiece for heating the coating thereon, means for continuously removing such gases from the oven, means for separating the gases removed from the oven into two streams, means for continuously recycling one said stream of gases directly into the oven, catalytic or burner chamber means receiving the other portion of said gases for oxidizing the solvent vapours with said gases, means for separating the combustion gases from said burner into two streams, and venting one said stream to atmosphere, means for recycling the other said stream of combustion gases directly into the intake of said oven, and air intake means for introducing make-up air into said oven, and monitoring means for monitoring the solvent vapour content of the effluent gases leaving the oven.
  • such apparatus will provide for means directing the incoming hot gases directly onto the surface of the workpiece at rela tively high speed, whereby to achieve high flow rates of gases over such surfaces of the workpiece, and at the same time to achieve maximum turbulence, whereby to minimize the development of a boundary layer effect.”
  • FIG. I is a schematic end elevations] view of a typical drying oven according to the invention, with portions thereof sectioned to reveal their construction;
  • F IG. 2 is a process flow diagram.
  • such apparatus is seen to comprise a drying oven or chamber 10, which is partially sectioned and is shown in end elevational view, that is to say, looking straight along the production line, along the axis of movement of the workpiece.
  • the details of the production line are not shown, but it will be understood that such a production line would consist of any means for moving a workpiece indicated in FIG. 1 by the reference w at a continuous rate through the oven 10.
  • the workpiece may, for example, be a continuous strip of sheet metal coated with paint, in which case it will be completely unsupported throughout the length of the oven, merely passing over rollers at one end and the other.
  • the workpiece may be a web of some other material to which a laminate is bonded by adhesive.
  • the workpiece may, in fact, be a series of separate items all of which have been treated in sequence with either a paint coating or laquer, or an adhesive or the like, which requires to be cured or dried by evaporation of a solvent.
  • such separate items or workpieces would then be supported in some other way, either laying on a suitable material handling conveyor, or hung from racks on an overhead conveyor or the like in any number of different ways which are well known in the art.
  • a suitable material handling conveyor or hung from racks on an overhead conveyor or the like in any number of different ways which are well known in the art.
  • various other modifications will have to be made to the interior of the oven 10, which will not depart from the scope of the invention and will be obvious to person skilled in the art.
  • a continuous header duct 11 running along the length of the oven along one side thereof, and provided at spaced intervals with branch ducts 12 extending above and below the workpiece as shown.
  • the branch ducts 12 are in turn provided with a plurality of spaced apart nozzles or jets 13 adapted and oriented to direct gases flowing therefrom directly down onto the surfaces of the workpiece so as to cause the same to impinge directly thereon and cause a maximum degree of turbulent gas flow, thereby inhibiting the build-up of any boundary layer.”
  • the header duct 11 is preferably supplied with a gaseous drying medium by means of the fan system 14.
  • Such nozzles 13 may be of any suitable design and will include slotted openings and the like.
  • an exhaust duct 15 is provided, and it in turn is split into a recycle duct 16, and an oxidation stream duct 17.
  • the recycle duct 16 is very substantially larger than the oxidation stream duct 17 so as to ensure that the major proportion of the effluent gases are recycled, and that the lesser remaining portion is delivered to the oxidation stream duct.
  • suitable adjustable controls and dampers can be incorporated in the ducting system to ensure the desired proportioning between the recycle duct 16 and the oxidation stream duct 17, such damper system being well known in the art and being omitted for'the sake of clarity.
  • a gas analyser 18 is provided in the oxidation stream duct 17, preferably an infra-red spectrum analyser, for the purpose of continuously monitoring the solvent vapour content of the effluent gases.
  • the oxidation stream duct 17 is connected through a fan system 20 to the burner chamber 21.
  • the burner chamber 21 is provided with a gas permeable burner screen 22, and fired by a gas burner system 23 supplied with natural gas or other suitable gas through the control valve 24.
  • the combustion products developed within the burner 21 will be at a substantially elevated temperature, and accordingly, the oxidation products duct 25 which removes the combustion gases from the burner 21 is of substantially larger size than the oxidation stream duct 17.
  • Any suitable temperature gauge 19 is provided in duct 25 for continuously sensing the tem perature of gases therein.
  • Theoxidation products duct 25 is itself split into two ducts.
  • the waste duct 26 is provided to vent a predetermined proportion of the combustion products to atmosphere, passing through the heat exchanger 27 to the outlet vent stack 28.
  • the combustion gases return duct 29, which is also connected to the duct 25, is substantially the same size as the duct 26, whereby to permit a more or less equal division of the oxidized gases flowing in duct 25 into two separate streams.
  • the return duct 29 is then connected to the plenum chamber 30, connected in turn to the fan system 14 for return into the oven 10.
  • the recycle duct 16 will also be seen to be connected to the plenum chamber 30 for mixing with the return stream in the duct 29, and recycling through the oven 10.
  • a fresh air inlet duct 31 is provided, connected to the plenum chamber 30, at one end, and at its other end, connected to the downstream side of the heat exchanger 27.
  • the heat exchanger 27 is supplied at its upstream end with fresh air entering through the air inlet 32, and the air inlet duct 33, and the fan system 34.
  • dampers may be provided in ducts 26 and 29, to proportion the splitting of the stream in the duct 25, and a suitable damper valve 35 can be supplied in the duct 29 to control the percentage of recycled oxidation gases and a similar damper 36 in duct 26 ,if desired.
  • Such gaseous drying medium within its predetermined temperature range, is driven by the fan system 14 into the header duct 1 1 and then to the branch ducts 12 where it is emitted by the jets or nozzles 13 directly onto the surfaces of the workpiece w. At these temperatures, the gaseous drying medium is itself sufficient to heat the coating material on the workpiece surfaces, and procure rapid and efficient vaporization of the solvent material therein.
  • the largequantities of such gaseous drying medium flowing directly from the jets 13, onto the surfaces of the workpiece will procure a highly efficient transfer of heat thereto, under turbulent flow conditions, and at the same time, the large volume of gases flowing through the oven 10 will ensure the rapid entrainment and removal of all solvent vapours developed by such heat.
  • the gaseous medium within the oven 10 is continuously evacuated through the effluent exhaust duct 15, and following removal from the oven 10, is then split into two streams, namely an effluent recycle stream carried in the effluent recycle duct 16, and an oxidation stream carried in the oxidation duct 17.
  • the pressure drop required to ensure such continuous full flow evacuation of effluent through the duct 15 is of course, secured in part by the operation of the fan system 14, and in part by the operation of the fan system 20 as described above.
  • the effluent recycle stream is substantially larger than the oxidation stream, and in the majority of cases, the effluent stream will be somewhere between seventy and eighty percent of the total effluent gases leaving the oven, and the oxidation stream 'will contain the balance, ie. somewhere between twenty and thirty percent of the effluent gases leaving the oven.
  • the effluent gases leaving the oven will, of course, be at a temperature slightly below the temperature at which they entered the oven, i.e., somewhere between and 900 F.
  • this stream is subjected to the control of the monitoring device 18, which continuously observes the solvent vapour-content of the effluent stream passing in the duct 17.
  • the fan system 20 drives the gases within the duct 17 into the burner system 21, where they are oxidized or burned, by means of passing the same through a permeable screen 22, and firing the same with a natural gas flame system from the burners 23.
  • the action of the natural gas flame is sufficient to raise the temperature of the solvent vapours to their autoignition" temperature, at which point oxidation will take place spontaneously in the presence of an excess of oxygen.
  • the supply of natural gas to. the burner will, of course, be varied so that it is just sufficient to maintain and support the auto-combustion of the solvent vapours, thereby minimizing the additional heat input.
  • Such combustion will raise the temperature of the resulting oxidation gas products to somewhere in the region of between 1,200 and l,600 F thereby increasing the volume of such gases.
  • the high temperature oxidation products are then withdrawn from the combustion chamber through the oxidation products duct 25.
  • the temperature of such gases in duct 25 is continuously checked to ensure that the temperature within the burner remains in a predetermined range and the natural gas supply to the burner may be varied accordingly.
  • the oxidation products are then split into two more or less equal streams, and one stream is vented.
  • the temperature of the gases will be in the l,200 to l,600 F'range, and the proportioning between the two ducts, will be somewhere between and 55 percent through the recycle duct and the balance, i.e., between 45 and 95 percent through the waste duct.
  • additional fresh air is introduced into the system through the air inlet duct 31.
  • Duct 31 is supplied with pre-heated air from the heat exchanger 27 into which air at ambient atmospheric temperature is introduced through the inlet 32, duct 33 and fan 34.
  • the pre-heated air flowing in the duct 31 is somewhere between 200 and 800? F. in the average process operation. However, in some cases, pre-heating of the air may be unnecessary and the incoming air will then be at ambient air temperature.
  • Such make-up air is again communicated to the plenum 30.
  • the mixture of gases reaching the plenum 30 is then forced by the fan 14 into the header duct 1 l, where it forms the gaseous drying medium entering the oven as described above.
  • Such gaseous drying medium will, therefore, be seen to comprise a mixture consisting of:
  • a mixture of gases making up the balance of 30 to 20 percent and comprising: 7
  • the combined mixture will have an overall temperature higher than the recycled untreated effluent gases, and within the desired processing range and in this way, continuous provision of gaseous drying medium is achieved for the oven 10 at a temperature within its desired processsing range, which gaseous medium is comprised to a very large extent of untreated recycled effluent gases from the oven itself, only a minimum portion of such effluent gases being bled off and subjected to burning for solvent removal, and only a minimum proportion of additional make-up air being added to the process at any given time.
  • the process is highly economical in fuel consumption in the burner, and is also economical in terms of consumption of fresh air, and at the same time, conserves the overall energy in the system to a great extent since only a small proportion of high temperature burnt gases are vented to atmosphere, i.e., between say 5 and 25 percent of the overall gas flow through the oven at any time.
  • the process according to the invention when applied to any particular solvent will be so designed and engineered as to operate at or near the maximum safe solvent vapour content, i.e., somewhere between 25 to 35 percent of the lower explosive limit of concentration of that particular solvent.
  • the process is so engineered that the gaseous drying medium entering the oven through the plenum, contains solvent vapours sufficiently below such safe maximum limit that the additional solvent vapours which are entrained with such gases as they pass through the oven, do not bring the concentration of solvent vapours in the effluent leaving the exhaust above such safe limit.
  • the speed at which the workpiece or other material carrying the coating layer is passed through the oven can be reduced, thereby providing a somewhat smaller quantity of solvent available for vaporization by the gaseous medium passing through the oven,-
  • alterations can be made in the composition of the coating material prior to entry to the oven so as to reduce the concentration of solvent therein, or possibly so as to reduce the thickness of the coating if this can be achieved without damage to the end product. It is to be particularly noted that in the present process, since there is no provision of an additional heat source such as radiant heating means within the oven, that the slowing down of the production line can, in fact, be achieved safely without damage to the coating layer or the workpiece in a great majority of cases. la the past, when ovens were customarily provided with radiant heaters directly heating the workpiece, the speed of movement could not be reduced without burning off or damaging the coating layer or the workpiece.
  • the heat supplied by the oxidation of a small proportion of the effluent gases in accordance with the process according to the present invention, will provide sufficient additional heat to ensure that the combined gaseous drying medium entering the oven through the plenum will be within the desired processing range,
  • a supplementary burner within the plenum (not shown) although this is usually found to be unnecessary.
  • the effluent stream exiting from the oven is continuously monitored by a gas analyser, such as an infra-red gas spectrometer or the like, which gives a continuous reading of the solvent vapour content of such effluent.
  • a gas analyser such as an infra-red gas spectrometer or the like
  • the temperature of the oxidation gases is also continuously monitored. Suitable warning lights and automatic cut-outs are provided (not shown) whereby plant personnel may be warned of any dangerous rise in concentration, and whereby the entire process may be shut down in the event of such a dangerous concentration continuing.
  • the upper and lower limits of the proportions of different gases in the various gas streams are more or less well defined, and are selected to provide for the maximum efficiency of operation, at a minimum of heat input and horsepower consumption.
  • the splitting of the effluent stream exhausted from the oven into a recycled effluent gas stream of between 70 and 80 percent, and an oxidation gas stream of between and 30 percent is determined by the fact that it is found that if more than thirty percent of the effluent gases are oxidized by passing through the burner chamber or a catalytic oxidation chamber, the percentage concentration of solvent vapours present in the effluent will gradually drop below the desired range of the between and 35 percent of the LE]... of the.
  • the percentage range of blending between returned oxidation gases, and fresh air is itself determined by the requirements for, on the one hand, the most efficient combustion or oxidation in the burner, and on the other hand, for the maintenance an adequate heat input into the gaseous drying medium in the plenum 30, sufficient to maintain such gas mixture within the predetermined processing range.
  • a typical low temperature process would be the dry-- ing of a solvent dispersed adhesive in a laminating process.
  • the adhesive may be applied by roller coating, curtain coating, spray coating and the like, and the solvents are evaporated in an oven.
  • the operating temperatures of such a process will be in the range of between about 200 and 400 F.
  • oxidation of the oxidation stream of the effluent gases will be achieved in a burner chamber, resulting in the creation of very high temperature combustion gases, then approximately between about 5 and 25 percent of the volume of combustion gases would be returned to the plenum to sustain the processing temperature, the balance being provided by the fresh air.
  • the gases in such chamber would be at a substantially lower'temperature, i.e., 700 to 900 F. as opposed to l,200 to 1,600 in the case of a burner. In this case, a somewhat greater percentage of the oxidation gases would then be returned to the plenum in order to sustain the desired temperature.
  • EXAMPLE 2 A process in' the intermediate temperature range will be, for example, the evaporation of a solvent from glass fibre material after impregnation with resin.
  • the processing temperature within the oven would be between 300 and 600 F, and between about 15 and 35-percent of the oxidation gases would normally be required to be returned to the plenum to sustain the desired operating temperature range in the gaseous drying medium.
  • gaseous drying medium comprises a mixture of gases consisting of between about seventyand eighty percent of said recycled effluent gases at a temperature slightly below said predetermined process range, and the balance of between 30 and 20 percent of said gaseous drying medium comprising a mixture of between about 5 and 55 percent of said oxidation products, and between about and 45 percent of fresh air.
  • the method of drying a solvent type coating as claimed in claim 1 including the step of pre-heating said fresh air, by passing the same through a heat exchanger, heated by said waste stream of oxidation gases.
  • Oven drying apparatus for the continuous evaporation of a solvent type coating composition after application thereof to a workpiece, having two sides and oxidation of such solvents prior to venting the same to atmosphere and comprising;
  • inlet fan means for forcing large volumes of a gaseous drying medium into said oven at an elevated temperature within a desired processing range
  • discharge means having a plurality of outlets spaced from one another for flowing said gaseous drying medium directly onto said workpiece from both sides thereof and procuring turbulent flow over the surfaces thereof, whereby to ensure efficient transfer of heat thereto and evaporation and entrainment of said solvent into said gaseous medium;
  • an exhaust outlet for continuously removing a gaseous effluent, from said oven, comprising said gaseous drying medium and said entrained solvent;
  • oxidation duct means connected to said recycle duct and said exhaust outlet for receiving a portion of said effluent gases therefrom;
  • oxidation chamber means connected to said oxidation duct means, and adapted to elevate said portion of said effluent gases to a higher temperature in the presence of sufficient free oxygen to support said oxidation sufficient to oxidize said solvents entrained therein, said oxidation chamber and said recycle duct being so arranged that the temperature of the effluent gases in said recycle duct remains substantially unchanged during recycling;
  • waste duct means connected to said chamber for conducting the balance of said oxidized gases therefrom and venting the same to atmosphere;

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US00187101A 1970-10-30 1971-10-06 Method and apparatus for drying solvents Expired - Lifetime US3757427A (en)

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CA096,469,A CA951190A (en) 1970-10-30 1970-10-30 Method and apparatus for drying solvents

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AT (1) AT321820B (de)
BE (1) BE774881A (de)
CA (1) CA951190A (de)
DE (1) DE2154062A1 (de)
FR (1) FR2110149A5 (de)
GB (1) GB1342159A (de)
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US3882612A (en) * 1973-07-27 1975-05-13 Moore Dry Kiln Co Method and apparatus for limiting the concentration of combustible volatiles in dryer emissions
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US3909953A (en) * 1974-02-28 1975-10-07 Midland Ross Corp Paint drying method and apparatus
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EP1053441A4 (de) * 1997-04-30 2006-01-18 Megtec Sys Inc Luftverteilungsraum für einen offenen brenner eines schwebetrockners
US20060275727A1 (en) * 2004-05-13 2006-12-07 Ye-Hoon Im Streater for manufacturing prepreg
US20090029062A1 (en) * 2005-11-25 2009-01-29 Advanced Photonics Technologies Ag Coil coating process and apparatus
US20100058609A1 (en) * 2006-05-18 2010-03-11 Fujifilm Corporation Drying method and apparatus for drying object
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CN101703995B (zh) * 2008-10-24 2012-09-19 汕头市远东轻化装备有限公司 涂布复合机的烘干装置
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US20140290093A1 (en) * 2013-03-29 2014-10-02 Semes Co., Ltd. Recycling unit and substrate treating apparatus
US20150086866A1 (en) * 2012-05-15 2015-03-26 Lg Chem, Ltd. Flow controller of drying oven with automatic air charge for manufacturing secondary battery
US9815083B2 (en) 2011-03-08 2017-11-14 Valspar Sourcing, Inc. Method for coating a five-sided container with sag-resistant water-based coating compositions
CN113465362A (zh) * 2021-06-18 2021-10-01 机械工业第九设计研究院有限公司 一种烘干设备热能回收系统
WO2023212673A1 (en) * 2022-04-29 2023-11-02 Industrial Furnace Service Hub, Llc Apparatus for devolatizing solids at low temperatures
US12085335B2 (en) * 2021-07-30 2024-09-10 Contemporary Amperex Technology Co., Limited Oven drying apparatus and coating device
ES3040421A1 (es) * 2024-04-30 2025-10-30 Fives Steel Spain S A Instalacion de calentamiento indirecto de hornos de curado de pintura

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US3314159A (en) * 1964-05-18 1967-04-18 Universal Oil Prod Co Fume treating system for a drying oven
US3514085A (en) * 1968-12-09 1970-05-26 Herbert J Woock Combustion chamber atmosphere control
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US3882612A (en) * 1973-07-27 1975-05-13 Moore Dry Kiln Co Method and apparatus for limiting the concentration of combustible volatiles in dryer emissions
JPS50109555A (de) * 1974-02-06 1975-08-28
US3909953A (en) * 1974-02-28 1975-10-07 Midland Ross Corp Paint drying method and apparatus
JPS50119350A (de) * 1974-03-07 1975-09-18
JPS50143240A (de) * 1974-04-10 1975-11-18
JPS515074U (de) * 1974-06-28 1976-01-14
JPS5133348A (en) * 1974-09-17 1976-03-22 Yodogawa Seiki Kogyo Kk Netsupujunkanshikikansosochiniokeru haikiryohoho
JPS5185549A (ja) * 1975-01-25 1976-07-27 Tabata Ind Mach Netsupujunkanshikimushukansosochi
JPS5190750A (de) * 1975-02-08 1976-08-09
JPS5192557A (de) * 1975-02-10 1976-08-13
US3999306A (en) * 1975-03-21 1976-12-28 George Koch Sons, Inc. Anti-pollution drying oven
US4086708A (en) * 1975-08-04 1978-05-02 Westlake Agricultural Engineering Inc. Grain dryer
US4073063A (en) * 1975-08-19 1978-02-14 Firma Otto Durr Method and device for drying surface treated, especially varnished objects
US4098007A (en) * 1977-06-07 1978-07-04 Milliken Research Corporation Drying oven controller
WO1980000183A1 (en) * 1978-06-26 1980-02-07 Matsushita Electric Works Ltd Dryer
JPS5539305A (en) * 1978-09-13 1980-03-19 Shoei Netsukougiyou Kk Method of controlling discharging and circulating air in drying furnace for printed matter
JPS5539304A (en) * 1978-09-13 1980-03-19 Shoei Netsukougiyou Kk Drying furnace for printed matter
US4484396A (en) * 1979-07-02 1984-11-27 United Air Specialists, Inc. Oxygen reduction system and condenser apparatus with automatic defrost
EP0047063A3 (de) * 1980-08-07 1982-03-31 Midland-Ross Corporation Mehrteiliger Ofen mit Kühlgasregulierung
US4343096A (en) * 1980-11-25 1982-08-10 Bobst Champlain, Inc. System for controlling emissions of a solvent from a printing press
US4504220A (en) * 1982-04-09 1985-03-12 Toshiba Kikai Kabushiki Kaisha Drying apparatus with deodorizing system for a printing machine
US4662840A (en) * 1985-09-09 1987-05-05 Hunter Engineering (Canada) Ltd. Indirect fired oven system for curing coated metal products
US4942676A (en) * 1988-06-07 1990-07-24 W. R. Grace & Co.-Conn. Control system for air flotation dryer with a built-in afterburner
US5112220A (en) * 1988-06-07 1992-05-12 W. R. Grace & Co.-Conn. Air flotation dryer with built-in afterburner
EP1053441A4 (de) * 1997-04-30 2006-01-18 Megtec Sys Inc Luftverteilungsraum für einen offenen brenner eines schwebetrockners
US20060275727A1 (en) * 2004-05-13 2006-12-07 Ye-Hoon Im Streater for manufacturing prepreg
US7596882B2 (en) * 2004-05-13 2009-10-06 Lg Chem, Ltd. Treater oven for manufacturing prepreg
US20090029062A1 (en) * 2005-11-25 2009-01-29 Advanced Photonics Technologies Ag Coil coating process and apparatus
US20100058609A1 (en) * 2006-05-18 2010-03-11 Fujifilm Corporation Drying method and apparatus for drying object
US8196312B2 (en) * 2006-05-18 2012-06-12 Fujifilm Corporation Drying method and apparatus for drying object
CN101703995B (zh) * 2008-10-24 2012-09-19 汕头市远东轻化装备有限公司 涂布复合机的烘干装置
US8689458B2 (en) * 2010-07-16 2014-04-08 Valspar Sourcing, Inc System and method for drying five-sided containers
US9255734B2 (en) 2010-07-16 2016-02-09 Valspar Sourcing, Inc. System and method for drying five-sided containers
US20120015102A1 (en) * 2010-07-16 2012-01-19 Valspar Sourcing, Inc. System and method for drying five-sided containers
US10556251B2 (en) 2011-03-08 2020-02-11 The Sherwin-Williams Company Method of coating metallic surface with coating having improved sag resistance
US9815083B2 (en) 2011-03-08 2017-11-14 Valspar Sourcing, Inc. Method for coating a five-sided container with sag-resistant water-based coating compositions
US20150086866A1 (en) * 2012-05-15 2015-03-26 Lg Chem, Ltd. Flow controller of drying oven with automatic air charge for manufacturing secondary battery
CN103017501A (zh) * 2012-12-10 2013-04-03 胡科 湿物烘干方法及其装置
US9275847B2 (en) * 2013-03-29 2016-03-01 Semes Co., Ltd. Recycling unit and substrate treating apparatus
US20140290093A1 (en) * 2013-03-29 2014-10-02 Semes Co., Ltd. Recycling unit and substrate treating apparatus
CN113465362A (zh) * 2021-06-18 2021-10-01 机械工业第九设计研究院有限公司 一种烘干设备热能回收系统
US12085335B2 (en) * 2021-07-30 2024-09-10 Contemporary Amperex Technology Co., Limited Oven drying apparatus and coating device
WO2023212673A1 (en) * 2022-04-29 2023-11-02 Industrial Furnace Service Hub, Llc Apparatus for devolatizing solids at low temperatures
ES3040421A1 (es) * 2024-04-30 2025-10-30 Fives Steel Spain S A Instalacion de calentamiento indirecto de hornos de curado de pintura
WO2025229241A1 (es) * 2024-04-30 2025-11-06 Fives Steel Spain, S.A. Instalación de calentamiento indirecto de hornos de curado de pintura.

Also Published As

Publication number Publication date
SE386259B (sv) 1976-08-02
FR2110149A5 (de) 1972-05-26
BE774881A (fr) 1972-03-01
DE2154062A1 (de) 1972-05-04
AT321820B (de) 1975-04-25
GB1342159A (en) 1973-12-25
CA951190A (en) 1974-07-16

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