A multistage bath condenser-reboiler according to the present invention includes: a heat exchanger core composed of (i) a heat exchange section formed by adjacently stacking condensation passages and evaporation passages, and (ii) a liquid communication section formed from liquid communication passages provided on at least one side surface in the stacking height direction of the heat exchange section; and one or more stages of liquid reservoir sections formed on at least one side surface in the width direction of the heat exchanger core.

A system and method for neon recovery in a double column or triple column air separation unit is provided. The neon recovery system comprises a non-condensable stripping column configured to produce a liquid nitrogen-rich liquid column bottoms and a non-condensable gas containing overhead and one or more condensing units arranged to produce a crude neon vapor stream that contains greater than about 50% mole fraction of neon with the overall neon recovery exceeding 95%. In addition, there is minimal liquid nitrogen consumption and since much of the liquid nitrogen is recycled back to the lower pressure column of the air separation unit, there is minimal impact on the recovery of other products from the air separation unit.

A tube heat exchanger extending in a vertical direction, comprising: a first chamber including a lower portion provided with at least one intake inlet for a diphasic fluid including a liquid and a first vapor containing a mist; an upper portion; and a first recovery member passed through by the first vapor and recovering the mist in liquid form, the first vapor next arriving in the upper portion, a central chamber forming liquid films running over the tubes and vaporizing at least partially to produce a second vapor, the tubes being traveled inwardly by a fluid hotter than the diphasic fluid, and a second chamber receiving the first vapor and the second vapor to form a third vapor, and including an outlet for the non-vaporized liquid and an outlet for the third vapor, the first chamber and the second chamber together forming a volume surrounding the central chamber around the vertical direction.

A core-in-shell heat exchanger, a method of fabricating the core-in-shell heat exchanger, and a method of exchanging heat in a core-in-shell heat exchanger disposed on a slosh-inducing moving platform are described. The method of exchanging heat includes introducing a shell-side fluid into a shell of the core-in-shell heat exchanger and introducing a fluid to be cooled into each of one or more cores of the core-in-shell heat exchanger, the one or more cores being arranged along an axial length of the shell with a plurality of baffles disposed on either side of the one or more cores along the axial length of the shell to reduce slosh of the shell-side fluid. The method also includes draining excess shell-side fluid using a plurality of drains, at least two of the plurality of drains being disposed on opposite sides of one of the plurality of baffles.

Heat exchanger with plates comprising a first series of passages for conducting at least one frigorigenic fluid and a second series of passages for conducting at least one calorigenic fluid, each passage being defined between two successive plates and extending parallel to a longitudinal axis, at least one mixing device arranged in at least one passage of the first series, said mixing device being configured to receive a liquid phase and a gaseous phase of the frigorigenic fluid and to distribute a mixture of said phases into said at least one passage. According to the invention, at least one passage of the second series adjacent to said at least one passage of the first series comprises a heat exchange structure divided in the longitudinal direction into at least a first portion and a second portion which are juxtaposed along the longitudinal axis, the second portion extending facing at least part of the mixing device, and being configured so as to present a heat exchange coefficient which is lower than the heat exchange coefficient of the first portion.

Plate-fin heat exchanger with mitered distributor design for improved fluid flow distribution through the plate-fin heat exchanger resulting in improved heat exchanger efficiency. Sections of the distributor have different fin types that provide improved distribution of the fluid through the heat exchanger. The fin types for the different sections of the distributor are selected based on a friction factor parameter ratio and a j-factor parameter ratio for the different fin types.

The invention relates to a heat exchanger assembly having two exchangers, each comprising a stack of parallel plates defining a first connection surface and a second connection surface that are adjacent to each other. The heat exchanger assembly can also include an enclosure between the first connection surface and the second connection surface, primary compartments in the enclosure configured to channel primary fluid through the first connection surface and the second connection surface, and a secondary compartment in the enclosure for channeling secondary fluid.

This specification relates to operating industrial facilities, for example, crude oil refining facilities or other industrial facilities that include operating plants that process natural gas or recover natural gas liquids.

Disclosed is a small-scale hydrogen liquefaction system using cryocoolers. The system includes: a pre-cooling heat exchanger for pre-cooling gaseous hydrogen using liquid nitrogen; a first cryocooler that primarily cools the gaseous hydrogen, pre-cooled by the pre-cooling heat exchanger; a heat exchanger attached to a cold head of the first-cryocooler; an n-th cryocooler (wherein n is a natural number equal to or greater than two) that is connected in series with the first cryocooler and cools the gaseous hydrogen, primarily cooled by the first cryocooler, to a liquefaction temperature of 20.3 K; a condensation plate arranged to be in contact with the n-th cryocooler to liquefy the gaseous hydrogen, cooled to the temperature of 20.3 K by the n-th cryocooler; and a low-temperature chamber providing an accommodation space to accommodate the pre-cooling heat exchanger, the first cryocooler, and the n-th cryocooler.

A system and method for argon and nitrogen extraction from a feed stream comprising hydrogen, methane, nitrogen and argon, such as tail gas of an ammonia production plant is provided. The disclosed system and method provides for nitrogen-argon rectification and the methane rejection within a column system comprised of at least one distillation column. Nitrogen and argon are further separated and to produce liquid products. An argon stripping column arrangement is disclosed where residual argon is further removed from the methane-rich fuel gas and recycled back to the feed stream.