ASME-PTC-31:2011 pdf free download

ASME-PTC-31:2011 pdf free download.High-Purity Water Treatment Systems.
condensate ion exdiauger: ion exchange equipment containing cation exchange resin in the sodium or amine form that is used for the removal of contaminants from steam condensates. Generally, this equipment is designed to operate at a much higher flow rate per square foot of resin bed surface than a typical softening ion-exchanger. Mixtures/blends of steam/process condensate and makeup water may also be processed by this equipment.
condensate polisher: see condensate de,nineraiizcr and condensate ion exchanger.
conductivity (cation): amplified electrical conductance of a solution that has had all cations and amines present replaced by hydrogen (I-I ) ions by being passed through a highly regenerated column of hydrogen form strong cation exchange resin.
conductivity ‘degasscd cation): cation conductance of a solution that has also been degasified to remove any contribution of carbon dioxide to the electrical conductance of the solution.
conductivity (specific): electrical conductance of a solution is a general property and is not specific for any particular ion. In determining the quality of the effluent from certain ion exchange proces, it is an excellent method of assessing total salt content. The value is reported in pS/cm2 (pmho/cm2).
copper: may be soluble or a particulate oxide.
count ercurron? flow: direction of flow of the regenerant is the reverse of the direction of flow of the service flow.
crossflow flit ratio,,: membrane processes use flow of the liquid across (tangential to) the membrane surface.
crud: particulate metallic oxides present in condensate that are filtered out in condensate polishers and powdered resin filtration systems.
dead end: term applied to cartridge and membrane filtration to signify flow path perpendicular to the surface of the filtration medium.
deaikali.er: application of acid regenerated cation or chloride regenerated anion ion exchange resins in equipment designed to reduce alkalinity in waters.
dealkalizer (split strewn): a system of dealkalization that blends acidic and alkaline waters to achieve a desired effluent alkalinity.
decarbonator (forced-draft): process equipment in water treatment installations used to reduce or remove free carbon dioxide from the water passed through it by contact between water and a stripping gas, usually air.
operating capacity: true measure of a resin’s ability to remove a given number of ions from solution. It is defined as the number of exchangeable ions available under a given set of conditions. These conditions are variable from one case to the next, and consist of such parameters as influent composition, effluent requirements, flow rate, concentration of regenerant used (i.e., degree of regeneration), temperature, exhaustion and rinse end points, resin selectivity, and particle size. The operating capacity is commonly expressed in ratios, in which the numerator is the weight of ions removed and the denominator is the volume of the bed (i.e., pounds per cubic foot (lb/ft3), kilograms per cubic foot (kgr/ft’), or equivalents per liter (eq/L)I.
operating cycle: ion exchange process consisting of a regeneration phase and a service run
orcaiic trap: application of selected ion exchange resins to remove large organic molecules from water to be treated. This selection can be made in lieu of gravity separation and flocculation equipment, such as conventional clarifiers, to remove organics.
osmosis: spontaneous transport (diffusion) of solvent across a semipermeable membrane that separates two solutions of different concentration.
osmotic ;;ressure: pressure that must be applied to a more concentrated solution to halt flow through a semipermeable membrane from the less concentrated solution into the more concentrated solution,
outside in: term used in cartridge and membrane filtration to describe flow path of liquid from external passage to the inside.
packed bed ton exchange: see ion exchange unit (packed bed). particulate matter: nonliquid matter, exclusive of gases, that is heterogeneously dispersed in water.