Wet line extension reduces VOCs from softwood drying

Article Abstract:

The effectiveness of the process of VOC drying software oriented strand board is based on the capacity to maximize surface moisture for a maximum amount of time. This requirement can be accomplished by allowing the rate of water seepage to the surface to be maintained with the rate of evaporative loss. The elimination of fines via green screening, or their reduction during processing and drying ought to lessen VOCs. The best drying technique must reduce temperature imbalances and moisture particles within the flake to cut the amount of dry spots which would produce a higher ration of VOcs.

Basic Chemical Manufacturing, Industrial Organic Chemicals, Organic Chemicals, Sawmills, Sawmills and planing mills, general, Softwood Lumber, Research, Organic compounds, Softwood, Softwood (Wood product)

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Pilot study of impulse drying industrial sludge

Article Abstract:

A pilot study in the use of impulse drying to increase the solid waste recovery in paper mill waste showed the system to increase solid waste recovery by 46% to 56% from 32% to 33% in the conventional pressing system. The system is estimated to have an energy requirement of 60 KWH per ton of dry solids. The technology was developed from the dewatering process of wet webs of paper and surpasses the conventional method of belt pressing by allowing more volume of sludge to be processes, with a higher percentage of solid waste recovery.

Woodpulp & Related Products, Pulp Mills, Wood pulp industry, Environmental aspects, Production processes, Waste management, Pulp industry, Industrial wastes, Paper mills

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Release of water and volatile organics from wood drying

Article Abstract:

The release of volatile organic compounds (VOCs) and water from wood during drying processes was studied. Moisture loss and VOC emission measurements were performed on samples of wood flakes by means of a flame ionization analyzer at a constant air flow of one pound per minute. Results shows that there is a lag between the release water and VOCs during wood drying operations. It was also found that only a small fraction of the wood flakes' total VOC content is lost during the drying process.

Chemistry, Wood, Industrial chemistry

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