US 8,104,745 B1Granted

Heat-generating jet injection

OwnerVladimir Vladimirovich Fisenkoinventor

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Abstract

A reboiling jet apparatus comprises at least two nozzles in series, configured to cause boiling of a hot liquid in the first nozzle, deceleration and reduction of the gas phase in the second nozzle, followed by acceleration and reboiling in the second nozzle. A second deceleration and reduction of the gas phase occurs at the outlet of the second nozzle. Each deceleration causes heating of the liquid by reduction of the gas phase; thus, energy of a pressurized input fluid is efficiently converted into heat by action of the nozzles. A convergent-divergent nozzle for steam injection with a mixing chamber may be used instead of the first nozzle to cause the first boiling. Another nozzle may be used to introduce a cold fluid at the outlet of the second nozzle for mixing with the hot flow prior to completion of the second deceleration.

Claims6

Dependent claims

A method, comprising:

feeding a hot liquid flow under pressure into a first nozzle to cause boiling of the hot liquid flow obtaining a volumetric gas-to-liquid ratio of at least about one-third with acceleration of the hot liquid flow to a supersonic velocity in the first nozzle;
discharging the hot liquid from the first nozzle into a divergent section of a second nozzle to cause deceleration of the hot liquid to a subsonic velocity with a sudden change of pressure, reduction of the volumetric gas-to-liquid ratio to less than about one-third and heating of the hot liquid flow, converting the flow to a homogenous isotropic liquid with entrained microscopic vapor bubbles;
and
accelerating the flow thorough a second section of the second nozzle to cause a second boiling of the hot liquid flow obtaining a volumetric gas-to-liquid ratio of at least about one-third with acceleration of the hot liquid flow to a supersonic velocity at an outlet of the second nozzle.

1 more element

Dependencies are inferred from the claim text.