Method and installation for the stoving of articles
AssigneeAir Industrie
InventorPaul Bornert
Life of this patent
Estimating the term…
Abstract
The present invention concerns a method and an installation for the stoving of articles, inter alia of freshly painted articles. A combustion is used to eliminate a substantial proportion of the polluting and solvent-charged products given off by the articles during stoving and entrained by the ventilating air which is evacuated from the stove. The purified and heated gas supplied by the combustion of the polluting products is reintroduced into the stove, with fresh air. Before combustion, the ventilation air is preheated in a heat exchanger whose source of heat is supplied with heat by said purified and heated gas.
Claims13
A method of stoving articles, such as freshly painted articles, which enter a stove and may undergo other preceeding or subsequent treatment in one or more enclosures, and in which combustion is used to eliminate a substantial proportion of the polluting and solvent-charged products given off by the articles during stoving and entrained by the ventilating air which is evacuated from the stove, said stoving being carried out in a stove including an inlet aperture through which the articles enter the stove and an outlet aperture from which the articles are discharged from the stove, said method comprising reintroducing the purified and heated air supplied by the combustion of the polluting products into the stove in the form of two gaseous curtains, one adjacent the inlet aperture and the other adjacent the outlet aperture, mixing said purified and heated air with fresh air prior to reintroduction into the stove, preheating the ventilating air in a heat exchanger prior to combustion, and supplying heat to said heat exchanger from said purified and heated gas.
A stoving installation for stoving articles, such as painted articles, comprising a stove having an aperture through which the articles to be stoved enter, an aperture through which the articles are discharged, and at least one evacuating aperture for the ventilating air which entrains a substantial portion of the polluting, solvent-charged products given off by the articles during stoving, and a burner connected through an evacuation conduit to the evacuating aperture for combusting said ventilating air and said products entrained therein and producing purified combustion gas, said installation comprising a first heat exchanger including a heat source disposed in the path of the ventilating air coming from said evacuation aperture and connected to a return conduit, means for supplying heat from said purified combustion gas coming from said burner to said heat source of said first heat exchanger, first and second air mixers connected to said return conduit and supplied with fresh air, the outlet paths of said air mixers being connected respectively to first and second purified air inlets for said stove so as to form first and second hot gaseous curtains, said first inlet being disposed adjacent the aperture through which the articles enter and said second inlet being disposed adjacent the aperture through which the articles are discharged.
Dependencies are inferred from the claim text.