PLATE-FINNED HEAT EXCHANGER (VERSIONS) Russian patent published in 2024 - IPC F28D9/00 F28F3/02 F28F9/02 F28F9/22 

FIELD: heat engineering.

SUBSTANCE: invention can be used in plate-finned heat exchangers for natural gas liquefaction plants, in gas processing plants. Plate-finned heat exchanger for heat exchange between three or more fluid flows, at least one of the latter is vapor-liquid and comprises manifolds for inlet and outlet of flows, heat exchange sections with channels and flow distributors. On its lateral sides closer to its end surfaces there are inlet manifold and vapor-liquid flow outlet manifold, and under the surface of the vapor-liquid flow inlet manifold on the side of the heat exchanger there are receiving openings for the vapor-liquid flow inlet into the flow distributors. According to the first version of the invention, the vapor-liquid flow inlet manifold contains a divider and a liquid distributor with a storage tank and guide tubes. According to the second version of the invention, the vapor-liquid flow inlet manifold contains a splitter and a liquid distributor with a storage tank and branch pipes with guide nozzles. According to both versions of the invention, an additional distributing nozzle is installed in all channels of the vapor-liquid flow of the plate-finned heat exchanger, axis of channels of which is located perpendicular to fluid flow. Additional distributing nozzle can be made perforated or corrugated perforated. Height of the vapor-liquid flow inlet header in the area of adjoining the lateral side of the plate-finned heat exchanger is at least one and a half times greater than the height of the receiving openings. Divider can be made in the form of a metal mesh installed in several rows across the movement of the introduced vapor-liquid flow or in the form of corrugated sheets, installed along the flow of the introduced vapor-liquid flow. Corrugated sheets of the divider can have perforation.

EFFECT: higher efficiency of heat exchange.

8 cl, 5 dwg