B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 47/06 (2006.01) B01D 47/04 (2006.01) B01D 53/72 (2006.01) C02F 3/00 (2006.01) C02F 3/02 (2006.01) C02F 3/06 (2006.01) C02F 3/12 (2006.01) C02F 9/00 (2006.01)
Patent
CA 2086927
2086927 9200792 PCTABS00010 A method and a device designed to clean air and water as well as to recover purified process water with reference to a drier (1) in a particle board or fiber board production process. The polluted air from the drier is fed through a scrubber (3) and is freed in the scrubber from the main part of solid and gaseous contaminants, before it is discharged into the atmosphere, whereas the process water is fed through a coarse separator, before it is returned to the scrubber. According to the invention a portion of the process water from the washing cycle is withdrawn and is fed through a biological purification plant (20), designed to decompose the organic contaminants, which are dissolved in the water, and after that the process water will be returned to the washing cycle. The integration of the two cycles and the variation of the flow through the purification cycle will influence the conditioning of the washing cycle and also its washing capacity, and in this way it will be possible to maintain the remaining organic contaminants in the discharged air below a certain limit value. In order to optimize the economy of the production process as well as the cleaning process the scrubber (3) is combined with a heat exchanger (8), designed to raise the temperature of the fresh air to the drier (1) and to lower the temperature of the water to the purification plant (20).
Abb Flakt Ab
Gowling Lafleur Henderson Llp
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