摘要:
The filter apparatus comprises a pressure vessel (1) having a main water inlet at the top and a water outlet (5) at the bottom, with a foraminous plate (3) located above the outlet to support a column of filter media within the vessel. The inlet comprises a coaxial downpipe (13) provided with a lower vortex generator (21) at its lowermost end, and an upper vortex generator (26) above the lower vortex generator. Each of the vortex generators comprises at least three outlet nozzles (17 to 20; 22 to 25) equispaced around the downpipe, the outlet nozzles of the upper vortex generator (26) being arranged symmetrically in a first plane around the coaxial downpipe and the nozzles in the lower vortex generator (21) also being arranged symmetrically in a second plane around the coaxial downpipe, the first and second planes being substantially parallel to one another.
摘要:
A filtering apparatus for liquids, based upon the structure and technology of ascending-flow deep filters of the continuous-backwash type, equipped with means for continuous self-regeneration of the filter bed, whether this be constituted by active material or inert material, of the type comprising a vertical cylindrical tank (1) having the bottom part that narrows in the form of an upturned truncated cone (3a) or that narrows by means of a crowned end plate, where the liquid to be filtered, referred to as "influent", is fed through an inlet (4) and evenly distributed over the filter bed from the bottom of the unit through a distributor (5) in which the liquid flows upwards traversing the filter bed (8) and is discharged from the filtering apparatus through an outlet overflow (9) for the effluent, regulated by an overflow, which determines the static level (10) of liquid present in the filter; where the granular particles that constitute the filter bed and the possible solids trapped therein are drawn downwards and then sent towards the top of the filter by a purposely provided lifting device referred to as "airlift" (11) present in the proximity of the bottom of the tank (1) and positioned at the centre of the filter; where the granular particles drawn downwards and lifted by the airlift free the trapped suspended solids; and where the granular particles at a high sedimentation rate are left to fall back onto the filter bed (8), thus reconstituting it, whereas the particles with a low sedimentation rate, i.e., the suspended solids that have been freed, are discharged into a purposely provided conduit (26); thus obtaining a backflow filtering: the influent, rich in suspended solids and/or dissolved substances, in its ascending motion encounters in the first filtering steps the granular filtering medium that, with descending motion, prepares to undergo the cleaning steps so that a large part of the pollutant charge is immediately removed from the filter bed, said filtering apparatus being characterized in that to apply regeneration of the filter bed in the filter itself, provided at the intake mouth of the airlift device (11) is a purposely designed washing and contacting chamber (22), referred to as "contacting reactor", and in that provided at the other end of the airlift device is a separation and finishing section (15 and 18), referred to as separator reactor.
摘要:
A device for conditioning an aqueous liquid, e.g. drinking water, includes at least one outlet for the conditioned liquid; at least one inlet (1) for receiving a flow of liquid to be treated; and at least first, second and third liquid treatment sections (3,4,5) arranged in parallel in flow sense, each containing a liquid treatment medium including at least one ion exchange material. The device is arranged to create at least three sub-flows of liquid from a first flow of liquid to be treated by distributing the first flow over the first, second and third liquid treatment sections (3,4,5). The device is arranged to obtain at least a bypass flow (6) of liquid, to conduct the bypass flow (6) through the device so as to bypass each of the first, second and third liquid treatment sections (3,4,5) and to unite the bypass flow with the at least three sub-flows upstream of the at least one outlet.
摘要:
A method for treating ballast water in a ship comprising at least two ballast tanks, by means of a system for treatment of ballast water, in which said ballast tanks are in fluid communication with each other such that ballast water can be pumped to each one of said ballast tanks and such that ballast water can be pumped between said ballast tanks either treated or untreated, the method comprising the following steps: Ballast water is pumped onboard such that at least one ballast tank is left empty; ballast water is pumped via the system for treatment of ballast water from one ballast tank with untreated ballast water to an empty ballast tank; continued pumping and treatment until the ballast tank being pumped from is empty.
摘要:
A flow separation system for separating multicomponent fluids into components having different buoyancies. The system can deaerate fluids, and segregate solid particles into a channel for removal or real time particle analysis. The system can have, positioned axially within a housing, a cup shaped first member having an axial passageway and a concave inner surface, a second member with a surface that forms a gap with the first member, the gap directing the flow into at least one helical channel. The flow exits the helical channel into a separation chamber positioned between the second member and a third member and separates into spinning heavier flow portion and a more buoyant portion that is driven toward the central axis. The third member has central fluid passageway that collects the higher buoyancy fluid and least one other fluid passageway for carrying lower buoyancy fluid, with an inlet positioned radially outward of the central fluid passageway.