WB0421_pgs_bkj.qxp_Wood Bioenergy Magazine 3/18/21 1:51 PM Page 20
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EDITOR’S NOTE: The following companies submitted these editorial profiles and images to complement their advertisements placed elsewhere in this issue. All statements and claims are attributable to the companies.
AIR BURNERS
High efficiency wood biomass drying
The PGFireBox from Air Burners
As unwanted biomass is a sustainable energy source and its conversion carbon neutral, Air Burners has perfected affordable waste-to-energy technologies based on its standard products and air emissions control features. Energy released by wood waste combustion is harnessed and converted into green electricity, which is used onsite or sold to the utility. It can also be stored in readily available portable energy storage banks. Optionally, the same machine provides heat energy for product drying and heating of buildings. This is Air Burners well-established PGFireBox line with models from 100KW to 1MW+. The PGFireBox is very simple to operate and is portable. It can “follow the waste” as the travel zone becomes unsustainable or the waste source is temporary. PGFireBox is a whole-log burner, simply meaning that no pre-processing of feedstock is needed. The chipping, grinding or pelletizing and related trucking of wood waste to make it suitable for most competing biomass plants is expensive and causes considerable pollution from the burning of hydrocarbon fuels by large diesels. None of that is required with the Air Burners machines. Air Burners is pursuing several target industries for its PGFireBox, such as municipalities struggling with landfill diversion of woody biomass, sawmills that require power and heat for lumber drying, forest management operations tasked with wildfire mitigation and forest restoration, rural power companies looking for simple sustainable distributed power options, and military installations looking for reliable power backup options independent of petroleum-based fuel.
BAKER-RULLMAN Baker-Rullman’s innovative triple-pass drum dryer design offers leading performance and efficiency in the smallest possible package size. A properly sized and tuned drum dryer system suited to your input volume is the key to planning an efficient system. Three full length cylinders provide the maximum effective length and residence time in a very compact
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package. The drum drive uses specifically designed engineering class bushed roller chains and sprockets. Trunnion rollers are machined from a forged billet of 1060 steel with a minimum roller face hardness of 165 BHN. The internal tapered roller bearings, which have a “B-1” life of 15 years, allow the roller to rotate around our stationary roller shaft supported by our hold-down pillow blocks. This design has proven to be more reliable than the commonly used small diameter roller with an integral cast shaft. The drum tire is hot forged from a single billet of AISI 1030 steel, then finish machined. There is no weld seam on it, and the steel grain structure is oriented for greater wear resistance and strength. To achieve efficiencies better than 1,500 BTUs per pound of water evaporated, the design incorporates longer residence times, robust temperature control and superior drum insulation. Precise electronic controls eliminate heat surges and fuel waste. Consistent evaporation in Baker-Rullman’s triple pass dryer design protects wood biomass from under or over drying. Heavier, wetter product moves slower than fine particles, giving uniform drying to all particles. That’s why these rotary dryers have long been known for protecting the integrity of all types of material.
BRUKS SIWERTELL Bruks Siwertell offers one of the most comprehensive ranges of conveyors on the market—from traditional belt and idler configurations and unique horizontal and vertical screw conveyors, to state-of-the-art, extremely efficient air-supported systems, including the Tubulator and the Belt Conveyor. The Belt Conveyor is the future in belt conveying, combining the use of air-cushion technology with Bruks’ standard belt conveyors. Customers can benefit from a high-capacity conveying system that offers minimal equipment wear and very low operating costs because of reduced friction in the conveying line. The totally enclosed design protects the environment from dust emissions and reduces material losses. With roughly 620 installations worldwide, the Tubulator is also an air-supported belt conveyor, built as a
Wood Bioenergy / April 2021
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