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Method for pest control and for producing low-concentration phosphine air mixtures and device for carrying out a method of this type
Method for pest control and for producing low-concentration phosphine air mixtures and device for carrying out a method of this type
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机译:有害生物防治和生产低浓度磷化氢空气混合物的方法以及实施这种方法的装置
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摘要
In the control of pests in gas-tight spaces using gaseous phosphine, concentrated phosphine gas is passed through a phosphine-permeable dividing wall and then immediately combined with air to give phosphine-air mixtures with concentrations below self-ignition limits. Control of pests in gas-tight spaces comprises: (a) providing a source of phosphine (PH3) in concentrated form; (b) conducting the concentrated gaseous phosgene from the source into an air stream through a PH3-permeable dividing wall such that the introduced PH3 is immediately diluted at its point of introduction to below the concentration limits for self-ignition of PH3-air mixtures; and (c) introducing the resulting PH3-air mixture into the space to be fumigated. An Independent claim is also included for an apparatus for performing the method comprising a tube fitted in its central region with at least one gas inlet manifold having a porous or PH3-permeable dividing wall with a flat outlet area; the tube can be combined with inlet and outlet pipes for a pressurized air stream; and the manifold can be combined with a concentrated PH3 gas source.
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