Ovens & Dryers
July 1, 2005
CIRCULAR TRAY DRYERModel K-10 Turbo-Dryer is used to remove the bound water of hydration from a specialty chemical at a rate of approximately 100 lb/hr. The dryer yields uniform product due to its positive retention time and close temperature control. Gentle handling allows continuous drying of low-density product without requiring a dust collector. Drying system includes a small fresh-air fan, electric heaters, interconnecting ductwork and temperature controls. Total motor horsepower required for the system is approximately 3 hp, and the required floor space for the primarily vertical system is approximately 5 x 10'.
CONVECTION OVENModel 1406STD is suited for applications such as ASTM testing, epoxy curing, moisture drying, UL testing and aging of electronic components and devices. Temperature ranges from 27 degrees F (15 degrees C) above ambient to 662 degrees F (350 degrees C). Standard mechanical convection oven also is available in clean room and inert gas models. Features include a long service life and ease of operation over a range of applications.
OVENS AND DRYERSThermatrol electric, gas or propane conveyor ovens utilize infrared heaters, infra-air, or combination infrared/convection heating so specific process needs are met. Other features include inline integral coolers, ability to interface with external PLCs, and integration with robotic operations. The infrared heat panels provide uniform curing and/or drying over the entire process. Recirculating hot air using high-velocity air knives breaks up moisture barriers and drives solvents away from the substrate.
Hix Corp., Thermatrol Div.
TRUCK-IN/WALK-IN OVENSTA Series truck-in/walk-in oven is designed for industrial process versatility and dependability. Typical applications include aging, bonding, curing, drying, finish baking and burn-in. The company's design, manufacturing, quality and innovation ensures industrial ruggedness, excellent process control, and dependable operation.
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VERTICAL CURING SYSTEMUltima system is configurable for continuous, inline curing of components in carriers, strips, magazines, baskets or other transport mediums. The oven design ensures good thermal performance utilizing a small, automated equipment footprint. The vertical format enhances inline integration to any process equipment, or it can be used as a stand-alone system. Process flexibility is achieved via nine separate curing chambers with independent controllers for temperature, airflow and exhaust for effluent gases. Internal active cooling provides reduced process time and product exits at less than 122 degrees F (50 degrees C).
Thermal Product Solutions
INFRARED OVENBT Series uses a refractory board reflector that can withstand a much higher temperature than a metallic reflector. The unit does not require air or water cooling and is designed to operate continuously in a high temperature environment. Because cooling is not required, airflow does not contaminate the product and the system has a smaller profile. The infrared heater can be used as a stand-alone oven, or it can be designed as a booster to augment an existing process. Because of its design, it also can be mounted inside a convection oven.
CUSTOM OVENS AND DRYERSDesigned to utilize specific combinations of radiant and air-impingement systems to satisfy the user's process requirements, custom ovens and dryers ensure product uniformity and maximize production. Suited for use in chemical, food, finishing, plastics and rubber, and textile operations, the ovens and dryers range in size from high volume to small batch or lab prototype.
COMBINATION SYSTEM SPEEDS COOKING, RETAINS FLAVORThe MESO (Multi Energy Source Oven) combination system utilizes a circular energy feed that allows the use of combination energy for volumetric and convection cooking at the same time. This enables the processor to have the broadest cooking profile available to fully develop the spices and cures. Products can have the color, taste and texture of conventional slow cooking with the speed of microwave heating while
enhancing the natural juices. System combines microwave with forced air and/or infrared.
3-ZONE HEATERBlack Flash BF3-4500S puts heat just where you need it -- over a pocket, at the bottom of a garment, or over an entire imprinted area. With this design, you save on energy, reduce heat on your platens, and produce a cooler work area. The three-zone heater can be positioned into the aluminum frames for convenient application with an automatic printer.
BBC Industries Inc.
TRAY DRYERSAvailable in 10- or 20-tray dryer designs, these machines are extensively used for powdered, granulated or semi-solid materials in batch operations. Applications include pharmaceuticals, pigment and dyestuff manufacturing as well as testing laboratories. The dryers are shipped assembled for quick connection to the required services.
Wolverine Proctor & Schwartz Inc.
OVENS FOR MANY APPLICATIONSCompany offers range of industrial ovens, including continuous models custom-designed for the specific application. The gas-fired drive-shaft tempering oven shown achieved a uniformity of +/-2 degrees F at 450 degrees F (232 degrees C). The parts were conveyed through the oven on a custom-designed part holder riding on a two-chain conveyor. Other heat-processing equipment can be used for metal finishing, preheating, solder reflow, composite curing, drying, aging, sterilizing and shrink-fitting. Equipment can be heated by gas (direct and indirect), electric and steam with temperature ratings to 1,400 degrees F (760 degrees C).
GLASS FIBER TOWER DRYERSGlass fiber finishing systems are used for drying chemicals and resins on glass fiber. Product line includes chemical and resin tanks, tower dryers, batch ovens and auxiliary equipment such as pads, accumlators and temperature controls. The entire operation is interlocked for simplified control. The tower dryers utilize a nozzle system to evenly distribute the heated air across the full width of the fabric. The nozzles are arranged in vertical rows with the cloth passing between them.
Wolverine Proctor & Schwartz Inc.
VERTICAL TOWER OVEN FOR DRYING/CURINGDrying and curing oven incorporates medium-wavelength infrared Type QF heaters. The panel heater delivers radiant heat across the full area of its face. The medium-wavelength energy generated is absorbed readily by water and most products, allowing high drying efficiencies. Hot air is recirculated to enhance drying and save energy. The combination of infrared and air improves drying efficiency by breaking the boundary layer and removing water vapor from the heater area.
Radiant Energy Systems Inc.
CATALYTIC INFRARED OVENSPaint drying infrared oven line includes dry-off, powder gel/ramp and cure ovens. Other models include continuous and batch convection cure ovens, combination systems, infrared retrofits and portable cure units. Long-wave catalytic infrared ovens reduce curing times of waterborne, powder and most other coatings.
Catalytic Industrial Systems
ELECTRICALLY HEATED CORELESS SCREWSpirajoule provides optimal thermal transfer to finely divided wet and dry products. Maximum efficiency is achieved by the product's direct contact to the heated screw. Product dwell time, temperature and air extraction are fully adjustable. Full inspection of the internal chamber eases cleaning and product changeover. The electrically heated coreless screw also allows injection of steam or dry air.
INFRARED OVENSCompany offers a range of infrared equipment in many sizes and configurations. Infrared technology allows faster heating than convection ovens, decreasing oven floor-space requirements by 75 percent to 90 percent. Heating can be provided by either gas catalytic or electric infrared, in long, medium or short wave, and they can be combined with convection as necessary.
Wisconsin Infrared Systems
AIRLESS DRYERAirless Dryer, developed and tested in New Zealand by Keith Engineering Ltd. of Sydney, Australia, uses superheated steam at atmospheric pressure as the drying medium. The drying system reduces air pollution and process odors while providing high product quality. The airless dryer does not require odor control equipment. Moisture from the product is condensed and noncondensables are ducted to the burners. Because superheated steam is used for drying, the risk of fire is reduced and the quality of oxidation-sensitive products is preserved.
ELECTRIC CONVEYOR OVENNo. 823 is an electrically heated, 1,000°F (538°C) belt conveyor oven being used for drying water-based glue on stainless steel mesh. Workspace dimensions measure 36" wide by 15" high x 15' deep. Incoloy-sheathed tubular heating elements provide 160 kW, and a 7,800 cfm, 5-hp blower provides vertical-downward airflow to the workload.
THROUGH-AIR DRYER HEATS AIR-PERMEABLE PRODUCTSThrough-air drying technology can be used to heat air-permeable products such as nonwovens. Heated air is supplied to the interior of the dryer enclosure through a perforated plenum mounted above the product line. A suction plenum beneath the line mechanically pulls hot air through the product. Heat transfer is almost instant and throughout the thickness of the product. Air drawn in through the suction plenum is returned to the burner chamber for reheating and reuse. For products that are heated in an indexing operation, an air-bypass system can be used to keep the dryer at operating temperature, cutting recovery time and energy costs.
CUSTOM OVENSConveyor, batch/walk-in, laboratory and specialty ovens can be specified in temperatures up to 2,000 degrees F (1,093 degrees C). Airflows are offered in horizontal, vertical or a combination of the two in electric, gas or steam models. Standard on/off or fully programmable controls can be specified to suit customer requirements. Multiple heating and cooling zones are possible.
Davron Technologies Inc.
IMPINGEMENT FLUIDIZED BED DRYERS AND TOASTERSAeroFlow fluid-bed system uses high velocity air-jets from nozzles above the conveyor to impinge air through the product bed and onto a nonperforated conveyor. This creates a gentle tumbling action as the product bed is fluidized and dried. The air-to-product fluidization throughout the product bed results in good heat transfer and helps
produce the desired product texture, color and flavor development. Product is conveyed through the dryer or toaster using a natural frequency designed vibrating pan conveyor.
DRYERS OPTIMIZE UNIFORMITYCascade dryer has a multi-deck, continuous batch, vertical design that permits quick product changeover, good moisture control and high energy efficiencies. Design also reduces floor space, maintenance and cleaning demands. It can be equipped with an integral cooler section with internal ducting, recirculation fans and heat zones.
Wenger Manufacturing Inc.
DRYING SYSTEMSUsed to remove water from wet commodities for the manufacture of usable dry products, drying system designs include triple- and single-pass models as well as flash tube dryers. Each is built to exacting standards, and a range of sizes is offered to suit a specific application.
BATCH OVENSEach batch oven in the product line is designed around the heating requirements of the application. Electrically or steam heated or gas-fired, each oven offers uniform heating capabilities up to 800 degrees F (427 degrees C), precise temperature control and any airflow pattern. Rugged, all-welded carbon steel construction ensures durability.
Benko Products Inc.
INDIRECTLY HEATED ROTARY CALCINERSDesigned to provide an efficient means for continuously processing granular materials and powders at high temperatures in oxidizing, inert or reducing environments, rotary calciner consists of a cylindrical rotating tube housed in a refractory-lined gas or electric furnace, positively sealed to prevent air infiltration. Product quality is optimized by a design that establishes and maintains the temperature profiles required of the process. The internal-flight design promotes a gentle tumbling action and provides uniform exposure and efficient heat transfer.
Alstom Power Inc., Air Preheater Co., Raymond Operations
CONTINUOUS DRYING PROCESS REACHES LOW MOISTURE LEVELSDrying to moistures of 0.5 to 0.1 percent or lower requires uniform heating and residence time. Paddle dryer allows you to reach these objectives with an indirectly heated continuous process. The mixing action of the paddle dryer's dual intermeshing agitators with heated wedge-shaped paddles provides for uniform heat transfer. Because the product moves through the dryer by displacement, residence time is controlled by the feed rate. Heating can be achieved with steam or thermal fluid at temperatures up to 750 degrees F (399 degrees C).
ELECTRIC INFRARED OVENElectric infrared heating elements and heater modules are suited for use in process ovens for applications up to 1,000 degrees F (538 degrees C). Heater design includes an aluminized steel cabinet to serve as a structural member in the construction of the oven. The heater does not have any moving parts, and the self-contained insulation provides operating efficiency.
WEB DRYING SYSTEMSConvective air-drying systems are suited for use in the paper, paperboard, converting and metals industries. Custom-engineered drying and cooling systems can be used for drying, curing, cooling, noncontact web support and web turning.
International Thermal Systems LLC
SPECIALTY OVENS AND CONVEYOR SYSTEMSSystems can be used to dry and cure liquid and powder coatings as well as adhesives on metal, wood or plastic parts. Conveyors can be custom spindle, indexing, flat-belt or overhead. Specialty fixturing can be designed to hold or mask the product. Oven systems may utilize long-, medium- or short-wavelength infrared, electric or gas, and in combination with convection.
COMBINATION DRYERS, OVENSSystems combine both infrared and convection, or radio frequency and convection, in a single unit. Combination dryers and ovens have independent temperature controls for the convection, infrared or radio frequency (RF). Thermodry combination dryers and Thermocure combination ovens utilize a combination of infrared and convection to solve the challenges of drying and curing. Combination convection and radio frequency dryers are offered in four main combinations: RF preheat, RF boost, RF finish, and full RF/Convection. Each combination offers benefits to improve the drying process.
C.A. Litzler Co. Inc.
TRAY DRYER, DEHYDRATORHarvest Saver has the ability to dry products ranging from pineapples to wildflowers. The cabinet dryer has fixed racks and capacity for 14 trays. Features include thermostatic temperature control, stainless steel interior and exterior sheeting, fully insulated enclosure, four-speed fan, electric heating coils (220 V, single-phase) and an adjustable fresh air inlet to provide humidity control.
Commercial Dehydrator Systems Inc.
MICROWAVE OVENMicrowave and radio frequency industrial heat processing equipment line includes a continuous microwave oven system designed to handle large products. The modular design allows it to handle a range of products. Modules can be added as required by the application. Each module is powered by a separate microwave source, either 75 or 100 kW. The system is PLC controlled.
REFLOW OVENSFeatures of the Ultra High Production System include Windows NT 4.0 graphic interface software; 14 vertical heating zones (14 top and 14 bottom heaters); a 180" (457 cm) long heat chamber with 137.2" (348 cm) of total linear impingement; and a 45" (114 cm) wide, uniform processing area. The high zone recirculation rate allows the Apollo to handle product loads up to 200 lb
(90.7 kg). With a built-in air/nitrogen atmosphere capabilty, the oven includes a four-zone, 72" (183 cm) long enclosed Genesis cooling section.
Conceptronic, A Division of CVD Equipment Corp.
DRYING, CURING SYSTEMSModuleDryer dries and turns a product up to 180° and is designed to be used in the paper, converting, textile and nonwovens industries.
Spooner Industries Inc.
TOP-DRIVEN SPHERICAL DRYERWith a compact design and close agitator-to-wall tolerance, this top-driven, spherical batch vacuum dryer is designed to minimize skin formation and allow maximum cleanability. The contoured discharge valve on the low point of the vessel ensures complete product discharge. The bottom half of the spherical vessel is swivel-mounted to simplify inspection and maintenance.
De Dietrich Process Systems Inc., Rosenmund Div.