| 摘要 |
In a method and apparatus for producing a low-oxygen content gas for pest control in foodstuffs, a fuel is burned in a burner (12) to produce a low-oxygen content exhaust gas which contains water vapour. The exhaust gas is passed over a cooling part (24) of a refrigeration system (20) to liquefy the water vapour content of the exhaust gas. The refrigeration system (20) preferably comprises an absorption chiller and is driven by heat generated during formation of the combustion products, thereby improving the efficiency of the system. The low oxygen content gas renders pests inactive by oxygen starvation and/or asphyxiation. The reduction of the water content of the exhaust gas prevents subsequent condensation and damage to the foodstuff. <IMAGE> |
