Method and device for fumigating products in an enclosed space

Abstract

Disclosed is a process used for fumigating products (2) in a closed room (4). The process comprises the steps of driving air in the room (4) to pass through at least a current getting-through modular unit (13, 38-42) equipped with absorption components (15) to circulate in a closed return circuit, with treating gas absorbed at the absorption components (15); activating a heater block (16) to release the treating gas from the absorption components (15) until enough treatment gas is blown into the closed room (4); stopping using the heater block (16); absorbing the treatment gas within absorption components (15) and reclaiming the treatment gas again by means of circulation of the air treatment gas mixture after passing though the current getting-through modular unit (13, 38-42), in case that the product (2) has been sufficiently fumigated.

Description

technical field [0001] The present invention relates to methods and apparatus for fumigation of products in enclosed spaces. Background technique [0002] It is known that fumigation of products, in other words the treatment of products by exposing them to a gas or vapor for a certain period of time, is often used in the shipping industry to protect goods from insects and other insects present in cargo or containers Pest damage. These fumigated goods ranged from tobacco, wood and furniture to clothing and footwear. [0003] One known technique involves placing in shipments aluminum or magnesium phosphide tablets, which emit highly toxic phosphine gas. According to another technique, toxic methyl bromide is diffused into the cargo by means of a fumigator. Other process gases or vapors may also be used, such as formaldehyde, sulfur fluoride, ammonia, hydrocyanic acid, and the like. [0004] After the gas or vapor has been applied to the container or placed on the stacked c...

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Problems solved by technology

[0006] Another disadvantage is that when degassing, process gases or process vapors are lost so that they cannot be reused for subsequent fumigation

[0007] There is also the disadvantage that, by applying an insufficient or wrong degassing, or no degassing at all, toxic or harmful gases or vapors remain in closed process spaces, thus endangering the health of persons entering these spaces, e.g. , dock workers or customs officers who transship or unload these fumigated products, and people living near sea ports, or even customers who obtain products in packages that still contain, for example, process gases or process vapors

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