Patent ID: 7279093
Filing Date: 2007-10-09
Classification: C02F,Y02W

Abstract:
1. An oxidation removal module for treating wastewater containing organic compounds comprising: an ozone injector adapted to be separately connected to a pump for feeding to-be-treated water, and an ozone generator, wherein said ozone injector is used to mix said to-be-treated water with an ozone source gas from said ozone generator; an ozone dissolution tank for receiving a resulting ozone/wastewater mixture directly from said ozone injector and providing a residence time for ozone to perform an oxidation reaction with the organic compounds in said to-be-treated water; a centrifugal type degassing separator connected to a top of said ozone dissolution tank, a constant pressure valve connected to said centrifugal type degassing separator, an adsorption type gas-liquid separator connected to said constant pressure valve, and an ozone destruct unit connected to said gas-liquid separator, wherein said degassing separator receives a mixture containing ozone, moisture and foams and destroys the foams, said constant pressure valve maintains a constant pressure in said degassing separator and discharges a mixture containing ozone, moisture and the remaining foams to said gas-liquid separator when the pressure is higher than a set value, wherein said gas-liquid separator comprises an adsorbent for adsorbing the ozone, moisture and the remaining foams, prolonging a residence time of the ozone, moisture and the remaining foams in the gas-liquid separator, so that liquid water is formed in the gas-liquid separator and can be withdrawn at a bottom thereof, and ozone and gases not-dissolved in the liquid water flow upwardly into said ozone destruct unit; a UV reaction tank for receiving an ozone-containing wastewater from said ozone dissolution tank and radiating said ozone-containing wastewater with a UV light to enable the organic compounds in the wastewater to undergo a photo-chemical oxidation; an optional auxiliary purification element, which is a membrane treatment element, an ion exchange element, an activated carbon adsorption element, or a degassing element, for further purifying an effluent discharged from the UV reaction tank; and a recycling mechanism, which comprises a recycling pipeline for recycling a portion of the effluent from the UV reaction tank, or an effluent from said auxiliary purification element, if said auxiliary purification element exists, to a stream of said to-be-treated water; an outlet pipeline for guiding the other portion of said effluent to a next stage; and one or more valves for controlling the flow rate ratio between the portion of the effluent recycled and the other portion of the effluent discharged to the next stage.