摘要:
The invention concerns a device comprising at least an electrostatic filter (20) with corona effect comprising an emitting structure (29, 32, 33) and a collector structure (24). The invention is characterised in that the collector structure (24) comprises a plurality of cavities trapping the particles contained in the gas medium, such as gases of an internal combustion engine. The emitting structure (29, 32, 33) comprises a plurality of serrated plates such as ratchets (32) designed to be connected to a high voltage circuit. Preferably, the collector structure (24) comprises a separator formed of a wire mesh. Advantageously, said device is associated with an oxidation catalytic converter and/or a continuously regenerating mechanical filter and/or suction means.
摘要:
Contaminant laden gas streams from wood product dryer operations, and other sources, are purified. The gas stream first is saturated with moisture by contacting the gas stream with fine liquid droplets which entrain particulates. The gas stream then is subjected to a plurality of separate particulate and liquid droplet removal steps before a droplet-free gas stream having substantially reduced particulate contaminant levels is passed to a burner for removal of volatile organic compounds from the gas stream.
摘要:
This invention refers to a device and a method for removing undesirable gases and particles from the air, which device comprises a purifying chamber through which air (1) to be purified is arranged to pass and having an entrance end provided with a zone (2) producing water dust, said purifying chamber being provided with ion emitting tips (3) operating by high voltage current and with collecting surfaces (4) collecting impurities from the air. The invention is characterised in that said zone (2) is provided with dies (7) producing water dust having a droplet size of 20 to 40 µm, and that said collecting surfaces (4) are grounded and that the ion emitting tips (3) are directed toward said collecting surfaces (4) and generate ion jets rushing from the ion emitting tips (3) causing water dust and gases and particulate materials attached to the droplets of said dust to be forced against said collecting surfaces (4).
摘要:
A method for reducing pollution emissions from a glass melting furnace using electrostatic granular bed (EGB) technology is disclosed. In one embodiment, sorbent dust containing an alkaline earth metal material, e.g., calcium, is injected into a prereactor for reaction with furnace exhaust gases. A layer of calcium material forms over the granules. These granules are co-mingled with granules from an EGB filter which, over a period of time, retain a layer of low resistivity alkali metal salt. The resulting mixture of granules maintains a high resistivity and therefore prolongs the life of granules used in the EGB filter. In an alternative embodiment, the granules in the EGB filter are themselves formed from an alkaline earth metal material. The granules react with sulfur compounds in the exhaust gas and form a layer of alkaline earth metal sulfates and sulfites in the granules. Simultaneously alkali metal-containing particles are deposited on the granules. The accumulated layers of pollutants are easily removed by mechanical agitation.