TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

HOT FLASH [18 records]

Record 1 2019-07-30

English

Subject field(s)
  • Pipes and Fittings
  • Steam-Powered Machines and Condensers
CONT

Condensate piping is used to remove condensate from steam-heated vessels, ideally for recovery and re-use in boiler feedwater. When hot condensate under pressure is discharged from a steam trap into a low pressure system, the resultant pressure drop causes some of the condensate to flash into steam.

French

Domaine(s)
  • Tuyauterie et raccords
  • Machines à vapeur et condenseurs
CONT

Cette conférence en ligne portait sur les méthodes de raccordement de la tuyauterie de condensation produite par les appareils de chauffage, de ventilation et de conditionnement d'air au réseau d'évacuation de plomberie.

Spanish

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Record 2 2003-08-29

English

Subject field(s)
  • Wastewater Treatment
  • Water Pollution
CONT

Two other heat-treating processes applied in sludge incineration are the flash-drying incineration system and the fluidized bed reactor. Flash drying involves pulverizing wet sludge cake with recycled dried solids in a cage mill. Hot gases from the incinerating furnace suspend the dispersed sludge particles up into a pipe duct where they are dried. A cyclone separator removes the dried solids from the moisture-laden hot gas which is returned to the furnace.

French

Domaine(s)
  • Traitement des eaux usées
  • Pollution de l'eau
OBS

[...] sous le nom de "flash roasting" (qu'on peut traduire par grillage éclair), on désigne la technique de Freeman [...] qui consiste à brûler littéralement la pyrite finement pulvérisée.

Spanish

Campo(s) temático(s)
  • Tratamiento de aguas residuales
  • Contaminación del agua
DEF

Eliminación del agua de un lodo de depuradora por tratamiento a una temperatura muy elevada.

Save record 2

Record 3 2003-04-28

English

Subject field(s)
  • Symptoms (Medicine)
DEF

A transitory attack or sensation of extreme heat (as in response to certain drugs or in certain physiological states) ...

French

Domaine(s)
  • Symptômes (Médecine)
OBS

«bouffée congestive» : Équivalent recommandé par le Comité d'étude des termes médicaux français.

Spanish

Campo(s) temático(s)
  • Síntomas (Medicina)
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Record 4 2001-08-29

English

Subject field(s)
  • Chemical Engineering
  • Wood Products
DEF

A type of lignocellulosics fractionation steam treatment which is based on a thermomechanical approach.

CONT

Thermomechanical steam treatment(TM-V). The defibrillation is accomplished by a short time steam treatment followed by a flash decompression. This process was patented by Mason(1928) and has constituted the technological basis for the production of a wide range of fiberboards. In the 1970's, the potential of this technique as a defibration and fractionation process was fully realized. Pilot and industrial installations derived from this technology are known under the generic name of "steam explosion methods"... The TM-V processes literally force the destructuring and eventual disintegration of the lignocellulosic wall structure. The hemicelluloses and a small part of the lignin can be extracted by hot water washing. The residue of this operation can be further extracted with an alkaline solution or with organic solvents in order to solubilize the lignin which can then be recovered by precipitation. Cellulose is obtained as the solid residue after the lignin extraction.

French

Domaine(s)
  • Génie chimique
  • Produits du bois
DEF

Procédé de fractionnement des matières lignocellulosiques à l'aide d'un traitement à la vapeur.

CONT

Traitement thermomécanique à la vapeur (TM-V). La défibration est accomplie par un traitement de courte durée, en présence de vapeur, et suivie d'une décompression flash. En fait, ce procédé a été mis au point par Mason (1931) et a constitué la technologie de base pour la fabrication d'une vaste gamme de panneaux agglomérés. Au cours des années 70, le potentiel de cette technique comme moyen de défibrer et de fractionner a été réalisé. Des installations pilotes et industrielles issues de cette technologie sont connues sous le nom générique de «méthodes explosives à la vapeur» [...]. Les procédés TM-V forcent la désagrégation des matières lignocellulosiques. Par lavage à l'eau, les hémicelluloses et une partie de la lignine sont solubilisées. Le résidu de ce lavage peut être extrait par la suite avec une solution alcaline ou avec des solvants organiques, afin de solubiliser la lignine, qui est ensuite précipitée et récupérée. La cellulose est obtenue comme le résidu solide provenant de l'extraction de la lignine.

Key term(s)
  • traitement thermo-mécanique à la vapeur

Spanish

Save record 4

Record 5 2000-02-24

English

Subject field(s)
  • Concrete Construction
  • Cement Industry
DEF

An abnormal early thickening or setting of cement slurry wherein the cement slurry becomes unpumpable.

CONT

Unlike flash set, cement pastes that showed this [premature] stiffening did not become hot because of a retardation of heat of hydration.

French

Domaine(s)
  • Bétonnage
  • Cimenterie
DEF

Prise du ciment durant ou immédiatement après le malaxage.

Spanish

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Record 6 1998-01-27

English

Subject field(s)
  • Plastics Manufacturing
CONT

Venting. When the hot plastic is injected into the mold it displaces air. In a well-built, properly clamped mold without vents, the injection material may compress the air. The heat of compression might burn the material. The force of the compression might open the mold, causing flash. The resistance of the compressed air might prevent the mold from completely filling. These problems are alleviated by used of vents, which are usually ground on the parting line. Their size depends on the nature of the material and the size of the cavity.

French

Domaine(s)
  • Plasturgie
CONT

Évacuation de l'air de l'empreinte. L'air contenu dans l'empreinte, non évacué et comprimé, provoque des brûlures sur les pièces moulées ou d'autres défauts tels que remplissages incomplets, soufflures, bulles ou soudures visibles et cassantes. Ce risque d'emprisonnement d'air dans la cavité est diminué lorsque l'empreinte est composée de plusieurs éléments. On peut dans tous les cas usiner de petits canaux dans le plan de joint.

Spanish

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Record 7 1993-05-18

English

Subject field(s)
  • Pulp and Paper
CONT

Blow heat evaporators typically take the form of a two-effect system in which flash steam(or hot condensate from the accumulator) is used as the heating medium for the first effect and vapors from the first effect are used as the heating medium in the second effect. Mechanical vapor recompression(MVR) raises vapor temperature through mechanical compression so that it can be re-used as the heating medium for evaporation.... Thermal recompression methods utilize high-pressure steam to entrain low-pressure vapor so that the resultant mixture(at intermediate pressure) can be used as the heat source for evaporation.

French

Domaine(s)
  • Pâtes et papier
CONT

Il existe maintenant un grand nombre d'autres systèmes de concentration de la liqueur noire qui peuvent remplacer ou améliorer les évaporateurs à multiple effet traditionnels. Le choix d'un équipement pour une usine moderne commande une étude minutieuse des avantages relatifs et du coût global des autres systèmes, principalement en termes d'épargnes d'énergie. Les méthodes de recompression thermique font appel à de la vapeur haute pression pour entraîner la vapeur basse pression de sorte que le mélange résultant (à pression intermédiaire) puisse être utilisé comme source de chaleur pour l'évaporation. La recompression mécanique de la vapeur (RMV) augmente la température de la vapeur par voie de compression mécanique pour que la vapeur puisse être réutilisée comme source de chaleur pour l'évaporation.

Spanish

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Record 8 1993-05-18

English

Subject field(s)
  • Pulp Preparation (papermaking)
  • Papermaking Machines
CONT

A variation of flash drying is embodied in the so-called "steam dryer", where fluffed pulp is dried in a medium of slightly superheated low-pressure steam rather than in hot air. Heat is transferred to the pulp and transport steam by indirectly condensing higher-pressure steam. The water evaporated from the pulp is removed from the steam as low-pressure steam suitable for process use in the pulp or paper mill. It is claimed that net heat consumption can be as low as one-fourth of that used in a conventional drying system.

French

Domaine(s)
  • Préparation de la pâte à papier
  • Machines à papier
CONT

Le «séchoir à vapeur» constitue une innovation prometteuse en matière de séchage de la pâte en flocons. La pâte y est séchée dans de la vapeur basse pression surchauffée moyennement ou légèrement plutôt que dans de l'air chaud. La chaleur est transmise à la pâte et à la vapeur de transport par condensation indirecte de la vapeur à pression plus élevée. L'eau qui s'évapore de la pâte est extraite de l'installation sous forme de vapeur basse pression pouvant servir dans les procédés des fabriques de pâtes ou de papiers.

Spanish

Save record 8

Record 9 1993-03-25

English

Subject field(s)
  • Pulp and Paper
CONT

The pulping reaction is stopped by extracting the hot residual liquor through screens at the periphery into a flash tank that supplies steam to the steaming vessel. The hot liquor is displaced by upward-flowing "wash liquor"(usually brown stock washer filtrate) which is injected near the bottom of the vessel and moves countercurrent to the chip flow to provide "diffusion washing". The digester is usually provided with sufficient height between the wash liquor inlet and extraction screens to allow at least 1. 5 hours for the residual liquor to diffuse out of the chips.

French

Domaine(s)
  • Pâtes et papier
DEF

(...) filtrat provenant d'un premier lavage de pâte écrue (...)

Spanish

Save record 9

Record 10 1993-03-09

English

Subject field(s)
  • Papermaking Machines
CONT

[Kamyr digester] The pulping reaction is stopped by extracting the hot residual liquor through screens at the periphery into a flash tank that supplies steam to the steaming vessel.

French

Domaine(s)
  • Machines à papier
DEF

Appareil servant à soumettre les copeaux à un premier traitement à la vapeur avant leur admission dans le lessiveur.

OBS

Pour "étuveur", voir l'article 3.2.3.2. dans VIPAP, 1976.

Spanish

Save record 10

Record 11 1992-10-22

English

Subject field(s)
  • Photography
CONT

Hot shoe is the name given to the slot on the top of an SLR into which you slide an electronic flash. "Hot" refers to the terminal within the shoe that establishes electrical contact between the camera and the flash so that the burst of light can be triggered at the instant you take a picture.

French

Domaine(s)
  • Photographie
DEF

Dispositif à griffe (...) comportant un contact de synchronisation pour flash. Son utilisation élimine la nécessité d'employer un cordon de synchronisation entre le flash et l'appareil-photo.

Spanish

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Record 12 1990-01-29

English

Subject field(s)
  • Taps and Plumbing Accessories
  • Heating
CONT

Impulse Trap. Under normal loads the discharge from this trap is intermittent. When the load is heavy, however, the discharge is continuous. This type of trap may be used on any equipment where the pressure at the trap outlet does not exceed 25% of the inlet pressure.

CONT

The impulse steam trap operates on the principle that hot water under pressure tends to flash into vapor when the pressure is reduced. When hot water is flowing to the trap the pressure in the control chamber is reduced, causing the valve to rise from its seal and discharge the water. As steam enters the trap, the pressure in the chamber increases, causing the valve to close, thus reducing the flow of steam to that which can pass through the small center orifice in the valve.

French

Domaine(s)
  • Robinetterie et accessoires
  • Chauffage
DEF

Purgeur thermodynamique dont l'obturateur constitué soit d'un piston, soit d'un disque, s'ouvre sous l'action des condensats pour en permettre l'évacuation, puis se ferme à l'arrivée de la vapeur.

Spanish

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Record 13 1988-10-30

English

Subject field(s)
  • Drying Equipment (Air Cond. and Heating)
OBS

flash dryer :(operates) on the basis of simultaneously conveying and drying a wet solid in high velocity stream of hot gas.

French

Domaine(s)
  • Étuves et séchoirs (Cond. de l'air et chauffage)
OBS

Séchage indépendant par mélange du type Flash Drying. [...] Il est [...] applicable aux combustibles solides [...] Le combustible passe dans une vis mélangeuse recevant une partie du produit sec. Le mélange est introduit par un émotteur [à cage Raymond] dans une colonne montante dans laquelle il est mis en contact avec les gaz chauds de séchage qui l'entraînent jusqu'au cyclone de séparation.

OBS

"flash dryer" a pour équivalent français "séchoir pneumatique".

Spanish

Save record 13

Record 14 1986-07-02

English

Subject field(s)
  • Calorimetry
  • Effects of Heat (Energy Transfer)
  • Geothermal Power Plants
CONT

The flash steam quantities, when multiplied by the power potentials of dry saturated steam... will give the power potential of the hot water..., provided that the flashing temperatures are taken at the optimum values between the initial and "sink" temperatures of the cycle.

French

Domaine(s)
  • Calorimétrie
  • Effets de la chaleur (Transfert de l'énergie)
  • Centrales géothermiques

Spanish

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Record 15 1986-06-25

English

Subject field(s)
  • Energy (Physics)
  • Geothermal Power Plants
CONT

Hot water sub-atmospheric cycle... Only one case of this cycle is known to the author, namely at Kiabutkwa, in the province of Katanga, Zaire... where a small British-made 220 kW power plant was put into service as long ago as 1953. It is believed to be no longer in use. This plant used hot spring water at 91°C which was sprayed into a chamber at a low pressure of 0. 3 ata, and the resulting flash steam passed through a 3-stage low pressure turbine exhausting to a condenser supplied with cooling water at 24°C. The plant was not self-starting, and the vacua in the flash chamber and condenser had first to be established by means of an ejector supplied with steam from an auxiliary wood-fired boiler.

French

Domaine(s)
  • Énergie (Physique)
  • Centrales géothermiques

Spanish

Save record 15

Record 16 1986-06-18

English

Subject field(s)
  • Energy Transformation
  • Geophysics
CONT

Fears were felt at Wairakei, before the hot water flashing experiment was undertaken, that the wear and tear on flash vessels might be excessive.

French

Domaine(s)
  • Transformation de l'énergie
  • Géophysique

Spanish

Save record 16

Record 17 1985-08-12

English

Subject field(s)
  • Energy Transformation
  • Effects of Heat (Energy Transfer)
  • Geological Research and Exploration
OBS

Ideally, the maximum power would be extracted from the hot water phase in a wet field by using an infinite number of flash vessels connected in cascade(multiflash) or at any rate by using one flash vessel for every turbine stage; but such a procedure would be an economic absurdity. It can, however, sometimes pay to provide two flash vessels.

French

Domaine(s)
  • Transformation de l'énergie
  • Effets de la chaleur (Transfert de l'énergie)
  • Recherches et prospections géologiques

Spanish

Save record 17

Record 18 1985-08-12

English

Subject field(s)
  • Energy Transformation
  • Effects of Heat (Energy Transfer)
  • Geological Research and Exploration
CONT

Certain types of hot spring or steam vent have been described by Tonani as ’leakage manifestations’(Tonani, 1970). He suggested that water boiling at depth in a deep reservoir could pass up to the surface through a fault(often an active one) much as it would pass up a well. This water would flash into steam and may condense by cooling near the surface.

French

Domaine(s)
  • Transformation de l'énergie
  • Effets de la chaleur (Transfert de l'énergie)
  • Recherches et prospections géologiques

Spanish

Save record 18

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