Abstract:
Receivers with a detachable seal comprising a porous compressive mass (4) substantially covering the whole base of the receiver are suitable for purifying liquids, particularly photographic processing baths.
Abstract:
A method for the treatment of liquids containing particles in suspension, by percolation of the liquid from top to bottom through a bed of granular material, notably of a ion exchanger resin, includes treatment cycles of the liquid and regeneration cycles of the resin, preceded by decompaction and washing operations, carried out in the same enclosure the inner space of which is divided into two superimposed compartments in mutual communication. The lower compartment is totally filled with granular material and the upper compartment is partly filled with granular material. The decompaction and washing operations of the granular material contained in the enclosure upper compartment are carried out periodically prior to each regeneration cycle by expanding the granular material by means of a current of liquid flowing from bottom to top.
Abstract:
A water demineralizer system and method is provided in which at least three beds of resin particles are connected in series flow arrangement preferably within a single vessel for substantially removing metal ions such as calcium and magnesium from water feed by exchange with hydrogen ions. The raw feed water flows first through an upper cation resin bed, then through an intermediate anion resin bed, and then through a lower bed of mixed cation and anion resins, and preferably flows downwardly through the beds. After the resin beds become saturated with metal ions from the feed water, mainly by calcium and magnesium ions, the beds are regenerated by first backwashing with water, then chemically treating with acid and caustic solution, followed by bed rinsing, air mixing and backflushing with water prior to further use for demineralizing the feed water.
Abstract:
A system for rapidly dewatering sludge in large quantities makes use of a filter plate that is capable of supporting heavy mechanized removal equipment without damage to the filter plate. The filter plate is monolithic and includes granular filter material that is rigidified and bonded together. In the disclosed process, sludge is pretreated with a polymer coagulant that breaks up solids and flocculates the sludge particles. The flocculated sludge is then spread on a bed of filter plates. As the bed is being filled, the large coagulated sludge particles settle and water is drawn off by gravity. A vacuum is then applied to the bed and the sludge is rapidly dewatered. Upon completion of dewatering, front end loading equipment may be used to remove the dried sludge cake from the bed.
Abstract:
The lower end of an ion exchange column is provided with a rotatable valve member which, in a first position, supports resin material in the column and, in a second position, allows the resin material to drop out of the column. The valve member can include a sintered body which in the first position supports the resin material and permits drainage of reagents introduced into the column. On rotating the valve member into its second position the sintered body can fall out of the valve member to permit the resin material to fall out of the column through the valve member. A replacement sintered body can be dropped down the column on to the valve member and the column can be refilled with resin material for further use.
Abstract:
Piping for use in liquid collection and distribution, e.g. in liquid-solid contact vessels, has an extruded pipe having on one side a pair of outwardly-projecting spaced arms each having a re-entrant lip forming a support channel with re-entrant sides extending along the channel. Channel-section strainer members are slid endwise into the support channel with the sides of the strainer channel being received between the lip and the outer surface of the pipe and with the bottom of the strainer channel, which is provided with strainer slots or perforations, bridging between the support channel sides. In use, orifices are formed through the side wall of the pipe to communicate with the interior of the support channel to provide for distribution and collection of liquids through the strainer members. The structure provides a screened slot extending continuously along the length of the pipe, and is easily assembled without requiring special tools.
Abstract:
An apparatus for the countercurrent treatment of liquids with adsorbents in an adsorption-filter the space of which is divided by trays which are permeable to liquids into at least 2 chambers, in which before and/or during the charging of the adsorbent in the upward flow, the regeneration of the charged adsorbent in the downward flow and the backwasting in the upward flow particular levels to which the industrial chambers are filled are established by transferring adsorbent from one chamber to the adjacent chamber.
Abstract:
In a cartridge for removal of impurities from water, an elongated tube is charged, between water-permeable barriers, with ion exchange resin of a type capable of removal of bacteria from water. Outside one such barrier, an inlet cap is charged with water-soluble bactericide in a shelf-stable, water-activatable form. Preferably, the bactericide is sodium salt of dichloroisocyanuric acid, in granular form.
Abstract:
A fluid distributor for use in ion exchange vessel assemblies contain ion exchange resins, particularly fixed-bed assemblies. The distributor includes a hub containing a central fluid passage and at least two sets of laterally disposed, fluid-distributing conduits. One of the sets of lateral conduits has holes screened by a fine, resin-retaining mesh. A remotely-controllable valve assembly disposed in the hub regulates flow between the hub and the sets of lateral conduits, so that flow between the screened conduits and the hub may be shut off. The hub also includes means for adjusting the relative rate of fluid flow through the sets of lateral conduits.
Abstract:
A column for removing poisons and/or other undesired substances from a liquid mixture. The column has a mixture of inactive filler particles and active granules positioned therein, with said filler particles being substantially larger than said active granules, (which are selected from adsorbing material and ion-exchanging material). The filler particles are in fixed contact relationship with each other and the active granules completely fill the spaces between the filler particles.