초록 ▼

Apparatus for generating a pesticidal gas mixture of phosphine gas and air for fumigating an enclosed environment, e.g. a grain silo, with phosphine. Air, moisture content adjusted by drying or humidifying, is passed through a porous bed of aluminium phosphide or magnesium phosphide, preferably in a

Apparatus for generating a pesticidal gas mixture of phosphine gas and air for fumigating an enclosed environment, e.g. a grain silo, with phosphine. Air, moisture content adjusted by drying or humidifying, is passed through a porous bed of aluminium phosphide or magnesium phosphide, preferably in a throw-a-way cartridge. The resulting mixture of air and phosphine gas is passed into the space. Typical humidities (which determines the phosphine concentration) are 4 g/m3 for “flow through”conditions or 12 g/m3 for “one shot”conditions of fumigation. The cartridge is fitted directly in sealing relationship between inlet and outlet adaptors to serve as the gas generator vessel of the apparatus. The cartridge, completely filled with metal phosphide in powder or granulate form, has cylindrical gas-tight side walls, flexible and stretchable to allow for expansion of the metal phosphide during hydrolysis, and porous end walls.

대표청구항 ▼

Apparatus for generating a pesticidal gas mixture of phosphine gas and air for fumigating an enclosed environment with phosphine, comprising a generator vessel, separate from the enclosed environment, the generator vessel including space defining means, comprising a replaceable cartridge containing

Apparatus for generating a pesticidal gas mixture of phosphine gas and air for fumigating an enclosed environment with phosphine, comprising a generator vessel, separate from the enclosed environment, the generator vessel including space defining means, comprising a replaceable cartridge containing a gas permeable metal phosphide charge and positioned to permit a flow of moist air to pass therethrough and through the gas permeable metal phosphide charge contained in the cartridge, which latter comprises gas impervious side walls and gas pervious end wall formations at opposite ends of the cartridge defining a space filled with the metal phosphide charge, said opposite ends being respectively connected to inlet and outlet ducts for air such as to be able to conduct a flow of air through the mass laden with moisture and from there, after reaction of the moisture with the mass, into the enclosed environment, and a pump means for inducing the flow of the air by way of the ducts through the mass and into the enclosed environment, and means for providing a rate of moisture supply to the mass within a predetermined range.