Fumigation of multiple grain storages from a single source of fu

Details Fumigation of multiple grain storages from a single source of fu Fumigation of multiple grain storages from a single source of fu

1997-04-07

1999-08-03

McKane, Elizabeth

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Using disinfecting or sterilizing substance

422 31, 422 40, 422292, 422305, 43125, A01M 1300, A61L 220

Patent

active

059321725

ABSTRACT:
Fumigation of grain in a storage facility having a plurality of grain silos or bins is effected from a single source of a gaseous fumigant. The single source of gaseous fumigant is connected to a gas supply duct through which a carrier gas flows. The gas inlet ports of the silos are also connected to the gas supply duct. The connection between each gas inlet port and the duct is provided with a respective valve and a respective orifice plate, the orifice or aperture of which is sized so that the pressure drop across the orifice plate into the silo is substantially greater than the pressure drop across any other component between the gas source and the silo. With this arrangement, the flow rate of gaseous fumigant through the grain-containing silos in the facility suffers only a minor perturbation when a valve between the duct and a silo is opened or closed. This minor perturbation can be readily compensated by maintaining the gas pressure in the duct at a constant value. The exit gases of the silos in the facility may be recycled through the silos, with the addition of gaseous fumigant periodically or as necessary to maintain a predetermined fumigant concentration.

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"Flow-through Phosphine Fumigation--A new Technique" by R.G. Winks, CSIRO, Division of Entomology, Canberra, Stored Grain Protection Conference, 1983, Section 5.1.
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"A new way of fumigatig with phosphine", Rural Research 140, Spring 1988, pp. 15-18.

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