Oven end-users often struggle with equipment that no longer meets their current production or process needs. “Should we replace our existing equipment with a new oven or repair, retrofit or rebuild the existing equipment?” is a familiar refrain.
Ensuring safety from fires and explosions in drying operations first requires the proper understanding of the thermal instability properties of the powder present in the plant. Four testing methods can effectively determine the powder’s thermal instability hazards and allow evaluation of the self-heating hazards.
Ignition sources for dust fires and explosions can take many forms. When powders are heated, however, new subtle sources of ignition hazards are revealed: Those associated with the inherent thermal instability properties of the powder being heated or dried, and the nature of the drying process.
The development of pasteurization as a method to destroy pathogenic bacteria in food and drink and, therefore, aid in food safety, dates back to the 19th century. However, the origins of heating (rather than cooking) food and drink for the purposes of preservation go back to China in the 12th century, where the technique was used to keep wine fresh and drinkable.
In my cub reporter days, I worked part-time at a service station and auto parts store. My job primarily consisted of accepting payment from those purchasing gas and selling the sundries one might pick up at a neighborhood quick-stop shop.
An industrial roofing manufacturer will use a large conveyor oven rated for a maximum operating temperature of 350°F (177°C) to dry the water off a coated scrim at 200°F (93°C). The finished product is used for various roofing applications.
A new program, dubbed Select, allows uses to identify, configure and purchase some of Watlow’s electric heater, temperature sensor, temperature controller and power controller products. Original equipment manufacturers, authorized Watlow distributors and end user customers can all use the online tool.
A tool and equipment manufacturer will use an electrically heated standard two-zone conveyor oven to temper steel parts. The oven, designed and built by Wisconsin Oven Corp., East Troy, Wis., has the capability to heat 1,800 lb of steel from 70 to 425°F (21 to 218°C) within one hour.
Selective catalytic reduction (SCR) systems utilizing a 32.5 percent liquid urea solution as the reagent were used for a temporary rental application for the first time, says Nationwide Boiler Inc., Fremont, Calif. Until the recent rental application, anhydrous ammonia, a chemical with stringent HAZMAT handling requirements, has been the standard reagent for rentals.
Valmet will supply an Advantage DCT100HS tissue production line, including an automation package, to Papelera San Andrés de Giles in Argentina. The line will help the company meet the demand for tissue products for the Argentinian market. Startup is planned for the second half of 2018.
A major U.S. manufacturer of electronic components placed an order worth over $3 million with Despatch for inert atmosphere ovens. The PND oven is currently used by the manufacturer for critical thermal processing needed to cure electronic components.
An upgraded combustion and emissions analyzer platform includes sensor protection, low-NOX measurement, near-field communications (NFC) and the ability to connect to and control the analyzer with a newly released mobile app.
An electrically heated oven will be used for drying small parts in a tray at a manufacturing facility. The 250°F (121°C) oven, designed and built by Grieve, has 3 kW installed in Incoloy-sheathed tubular heating elements. A 300-CFM, 1/3-hp recirculating blower provides vertical airflow upward through tray to the workload.
Opened in 1898, Siemens’ Norwood Motor Manufacturing plant, just outside of Cincinnati, is one of the company’s longest continuously operating plants globally, says the company. To celebrate the milestone, the facility recently opened a test observatory. The new equipment extends Norwood’s testing range from 10,000 to 20,000 hp at frequencies from 10 to 300 Hz to address the increased use of variable-frequency drives.
The U.S. Chemical Safety Board (CSB) released a factual update into its ongoing investigation of the blowout and fire at the Pryor Trust Gas Well on January 22, 2018, in Pittsburg County, Okla., that killed five workers.
Watlow, St. Louis, Mo., acquired Yarbrough Solutions Worldwide, a semiconductor equipment solutions provider that services semiconductor fabrication companies globally by developing, installing and servicing solutions at its customers’ fabrication plants. In performing these services, the Austin, Texas-based company has long utilized Watlow product offerings.
Process heating equipment skids include standard unitary steel bases that allow cover-lift hoists, process air ductwork, control panels, monitoring instrumentation and other auxiliary equipment to be attached to the system as a single unit.
Designed to complement the company’s line of 1 to 30 ton chillers, VS Series is supplied with four variable-speed compressors that operate effectively between 10 percent and 100 percent of rated capacity.
The Sentinel RT single-phase UPS line offers true online, double conversion technology for maximum power protection and a clean sine wave output. Rated for 115/120/127 VAC, the 60 Hz models have capacities of 1, 1.5, 2, 3, 6 and 10 KVA.
Line of flat and round heat pipes includes round heat pipes in lengths of ~2.76 to 23.6" (70 to 600 mm) and diameters of ~0.15 to 0.4" (4 to 10 mm). Flat heat pipes are available in lengths of ~2.76 to 19.7" (70 to 500 mm), widths of 0.19 to 0.45" (4.83 to 11.41 mm), and heights of ~0.08 to 0.26" (2 to 6.5 mm).
A 250°F (121°C) electrically heated oven, No. 861 is used to dry small parts in a tray at the user’s facility. A 300-cfm, 0.33-hp recirculating blower provides vertical airflow upward through tray to the workload while 3 KW are installed in Incoloy-sheathed tubular heating elements.