Abstract:
An ultraviolet light irradiation apparatus providing combined mechanical and chemical cleaning of light irradiation tubes for removing radiation blocking precipitates from the surface of the tubes. A scraper ring is fitted to the outside of each of the tubes and includes a chamber for receiving a relatively small quantity of cleaning solution. The scraper rings are reciprocated in a sliding action along the tubes which action synergistically acts with the cleaning solution to remove precipitates from the tube surface including fine particles lodged in concave pits in the tube surface.
Abstract:
A mass transfer system for decontaminating a contaminated liquid or gas stream. The system includes a container with a liquid inlet, a liquid outlet, a gas inlet and a gas outlet. The container is adapted to channel a liquid stream from the liquid inlet to the liquid outlet. The vessel is also adapted to channel a gas stream from the gas inlet to the gas outlet. At least one grid is mounted within the container and is positioned within the gas and liquid streams. The grid has a plurality of apertures formed therein which are adapted to disperse the gas flow as it passes through the grid. The dispersion of the gas flow generates a fluidized bed within the container. The grid is preferably parabolic in shape. A light assembly is mounted on the container and has a light emitting unit positioned so as to emit light into the container. The light irradiates at least one of the streams flowing therein. The configuration of the system is designed to cause the mixture of the gas stream and liquid streams to become turbulent, thereby increasing the liquid surface area. The light emitting unit is positioned so as to irradiate the two turbulent fluid flows so as to catalyze a chemical reaction. In one embodiment, an oxidant is added to one of the streams which, when irradiated by the ultraviolet light, produces hydroxyl radicals which chemically react with the contaminants in the stream.
Abstract:
A device is provided for irradiating a fluid containing molecules subject to photolytic fission within a conduit, wherein the conduit includes a first opening and a longitudinal axis, the device comprising a valve fluidically connected to the first opening, the valve having a passageway leading to a second opening; a first optical member sealing the second opening; and an electromagnetic radiation (EMR) source positioned relative to the first optical member such that the EMR is directed, preferably along the longitudinal axis, through the first optical member and the passageway and into the conduit when the valve is an open position; wherein the first optical member is constructed from a material which is permeable to the EMR. The EMR source is preferably adapted to emit EMR at a wavelength sufficient to cause photolytic fission of the selected molecules in the fluid, and more preferably adapted to emit EMR at a wavelength sufficient to cause photolytic fission of nitrogen trichloride, diatomic chlorine, or both. Also, an air purging device is optionally provided near the valve so that fluid may be purged from the vicinity of the first optical member when the valve is being closed. Additional optical members, such as a filter, may be optionally disposed between the first optical member and the EMR source.
Abstract:
A replaceable wiper cartridge is described which is held captive within a shuttling scraper of a type known in the art which is pushed axially through a cylindrical reaction chamber intermittently to remove reaction products from the inside surface of the reaction chamber and from the outside surface of a smaller coaxial tube that extends the length of the reaction chamber. The replaceable wiper cartridge has an annular shape that is obliquely cut to permit a slight radial expansion to accommodate the smaller coaxial tube and to engage it in a tight sliding grip so as to scrape from the smaller tube any deposits.
Abstract:
A wiper assembly is provided for cleaning the reactor tubes of an ultraviolet-light reactor. The wiper assembly is positioned inside a reactor chamber of the ultraviolet-light reactor. The wiper assembly includes a wiper that has a circular opening sufficiently large to accommodate a reactor tube. A wiper blade is formed on the wiper circumferential of the opening and being deflected such that when the reactor tube is positioned through the opening, the blade engages the outer surface of the reactor tube. The wiper is formed of a plastic material. The wiper is connected to a platform positioned within the reactor chamber. The platform supports the wiper in the reactor chamber such that the reactor tube extends through the opening in the wiper. According to one aspect of the invention, at least one rod is connected to the platform. The rod extends out of the reactor chamber. The rod can be moved from outside the reactor chamber for mechanically reciprocating the platform along the length of the reactor tube in the chamber, whereby, the wiper blade slides along the outer surface of the reactor tube to wipe off at least some of the fouling that may have accumulated on the outer surface of the reactor tube. According to another aspect of the invention, the platform is supported by a plurality of floats to move with the fluid level in the reactor chamber.
Abstract:
A liquid purification system comprising a housing with inlet and outlet for the flow of the liquid to be purified. A source of ultraviolet is mounted within the housing surrounded by a sleeve of ultraviolet-transmissive material such as quartz. A rod mounted for reciprocal movement is mounted in the housing and extends out of the housing. On the rod is mounted wiper assemblies each one of which consists of tear-shaped plate to surround the sleeve, a washer of suitable material on the plate to make contact with the sleeve for wiping the outer surface of the sleeve as the rod is reciprocated, and a securing device to hold the washer in place. Pins with press-on nuts are employed to sandwich each wiper assembly together.
Abstract:
An improved radiation-emitting device of the type for containing gas and an electron flow therein between electrodes. First and second separate elongated principal members form an elongated envelope volume having constant cross-sections along its length. The first principal member is outwardly convex and radiation-transmissive and the second is inwardly concave and radiation-reflective, preferably having a metallic inner coating. The members are arranged and configured so that the envelope volume is less than that of a cylinder of similar cross-dimension. Pural electrodes are preferably used.
Abstract:
An improved radiation-emitting device of the type for containing gas and an electron flow therein between electrodes. First and second separate elongated principal members form an elongated envelope volume having constant cross-sections along its length. The members are arranged and configured so that the envelope volume is less than that of a cylinder of similar cross-dimension. The inner surface of the second principal member has projecting structures which extend to distal ends adjacent to the first principal member.
Abstract:
A method and apparatus for purifying secondary waste water effluent by ultraviolet radiation, wherein a plurality of ultraviolet lamps are concentrically mounted within support jackets arranged in parallel and which extend transversely across the fluid flow path of the waste water to be treated, adjacent jackets being spaced less than about one half inch apart so that none of the waste water is more than about one quarter inch away from a jacket as it flows past the lamps, and wherein the number of lamps is selected to satisfy the equation:3.ltoreq.X(l)/V.ltoreq.5where X is the number of lamps, l is the usable arc length of the lamps in inches, and V is the volume flow rate in gallons per minute.
Abstract translation:一种用于通过紫外线辐射来净化次级废水流出物的方法和装置,其中多个紫外线灯同心地安装在平行布置的支撑夹套中,并且横向延伸穿过要处理的废水的流体流动路径,相邻夹套间隔开 小于约半英寸,使得在流过灯管时,任何废水不超过夹套超过约四分之一英寸,并且其中选择灯的数量以满足以下等式:3 = X (l)/ V <5其中X是灯的数量,l是灯的可用电弧长度,单位是英寸,V是以加仑/分钟计的体积流量。
Abstract:
An ultraviolet liquid purification system includes a purification chamber having banks of ultraviolet lamps distributed therein for applying germicidal ultraviolet radiation to the liquid flowing through in said chamber. Ultraviolet photocell detectors are located in said chamber to detect the level of ultraviolet radiation transmitted through the quartz jacket housing the ultraviolet lamps and through the liquid being purified. Indicator means produce an alarm signal when the total ultraviolet radiation transmitted through the liquid drops below a preselected level. In addition, a light conducting fiber is provided for each ultraviolet lamp having its input endface located at the ultraviolet lamp and its output endface at a display panel whereby identification of a particular ultraviolet lamp that has failed may be easily detected. Photocell detector means are provided to detect the light output at the output endface of the light conductor fiber and to produce an alarm signal when said light output fails. An in-place cleaning system for cleaning the interior of the purification chamber is also provided.