초록 ▼

Various embodiments of photoreactors are disclosed which have at least two irradiation chambers with a window therebetween. Ultraviolet radiation is introduced into one of the chambers at a side opposite the window so that it passes through that chamber, through the window and into the other chamber

Various embodiments of photoreactors are disclosed which have at least two irradiation chambers with a window therebetween. Ultraviolet radiation is introduced into one of the chambers at a side opposite the window so that it passes through that chamber, through the window and into the other chamber. The fluid medium to be purified is passed through the chambers and subjected to the radiation while in the chambers. The flow of the medium is through the chambers in series in some embodiments and in parallel in others. An embodiment is disclosed wherein a recirculation line is established around the reactor with the recirculation being continuous or intermittent. When intermittent the purified fluid medium also is drawn off intermittently, between the periods of recirculation. In some embodiments the amount of radiation traversing all the chambers is monitored. If the monitored amount drops below a given amount, the apparatus is shut down. Alternatively, the rate of flow of the medium is adjusted, based on that monitored amount, with the rate of flow increasing or decreasing, respectively, in response to increases or decreases in that amount.

대표청구항 ▼

A process of purifying a fluid medium with ultraviolet radiation wherein the medium is passed through an apparatus including a photoreactor wherein it is exposed to the ultraviolet radiation and thereby irradiated, said process being characterized by: recirculating the irradiated medium through the

A process of purifying a fluid medium with ultraviolet radiation wherein the medium is passed through an apparatus including a photoreactor wherein it is exposed to the ultraviolet radiation and thereby irradiated, said process being characterized by: recirculating the irradiated medium through the apparatus and back through said photoreactor; drawing off a portion only of the recirculated medium from the apparatus to serve as the purified medium; concurrently with said withdrawal adding unpurified medium, in an amount equivalent to that so withdrawn, to the apparatus to be mixed with the irradiated medium remaining therein to produce a mixture of irradiated and nonirradiated medium; and irradiating said mixture while it is being recirculated through the apparatus.