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.

A dual fluid heat exchange system is presented that provides a stable output temperature for a heated fluid while minimizing the output temperature of a cooled fluid. The heated and cooled fluids are brought into thermal contact with each other within a tank. The output temperature of the warmed fluid is maintained at a stable temperature by a re-circulation loop that connects directly to the mid portion of the tank such that the re-circulated fluid flow primarily warms only a re-circulation section of the tank. The other, lower flow rate, section of the tank may be positioned so that it has a cooler temperature and thus serves to increase the efficiency of the heat exchange by extracting extra heat energy out of the cooled fluid before it leaves the tank. Alternatively, the low flow rate section of the tank may be warmer than the re-circulated section, and thus allow the re-circulated section to be cooler than the output temperature of the warmed fluid.

An evaporator (1) for vaporizing a substance into its gaseous form, which comprises a cylindrical outer shell (2) and a plate pack (4) arranged inside the cylindrical shell in its lower part and a droplet separator (9) arranged above the plate pack. A recirculation of a substance to be vaporized is carried out by using flow guides (10a, 10b) arranged tightly between the plate pack and the outer shell and by an ejector pipe (13) arrangement comprising a collection pipe (11) arranged inside the outer shell.

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.

Two or more cores (2a, 2b) in each of which two more types of passage layers through which two or more fluids flow are layered alternately are welded together. The entire bottom portions of the cores (2a, 2b) are covered with a lower header tank (3), thereby making the fluids flow into the cores (2a, 2b). A dummy layer (14) through which none of the fluids flow is provided beside a weld side face of each core (2a, 2b). A weld spacer (18) is welded to the entire peripheral edge of a side plate (16) of the dummy layer (14). A through-hole (16a) for draining water in the dummy layer (14) is made near the lower end of the side plate of the dummy layer (14). Further, a liquid drain hole (20) through which water is drained is made at a lower corner of the weld spacer (18).

A can-type heat exchanger may include a housing having a space therein, integrally formed with a mounting portion, and a first inlet and a first outlet; a partition wall integrally formed to the housing, separating the space and the inside of the mounting portion, and forming a bypass passageway inside of the housing; a heat radiating unit inserted into the space, provided with connecting lines alternately formed by stacking a plurality of plates; a cover cap mounted at opened one surface of the housing, and a second inlet and a second outlet for communicating a second connecting line of the connecting lines; and a valve unit mounted at the first inlet formed in the mounting portion and penetrating the partition wall in the mounting portion, selectively opening and closing the space or the bypass passageway separated by the partition wall using linear displacement.

A heat transfer plate comprising a first port opening and a second port opening for allowing a first fluid to flow over a top surface of the heat transfer plate, a first side opening and an opposite, second side opening for allowing a second fluid to flow over a bottom surface of the heat transfer plate, a number of rows of alternating tops and grooves that extend along the heat transfer plate, where a transition between a top and an adjacent groove is formed by an inclined portion, and plate portions that extend along the heat transfer plate, between the rows of tops and grooves, thereby forming flow channels between the rows of tops and grooves.

A plant or refinery may include equipment such as reactors, heaters, heat exchangers, regenerators, separators, or the like. Types of heat exchangers include shell and tube, plate, plate and shell, plate fin, air cooled, wetted-surface air cooled, or the like. Operating methods may impact deterioration in equipment condition, prolong equipment life, extend production operating time, or provide other benefits. Mechanical or digital sensors may be used for monitoring equipment, and sensor data may be programmatically analyzed to identify developing problems. For example, sensors may be used in conjunction with one or more system components to detect and correct maldistribution, cross-leakage, strain, pre-leakage, thermal stresses, fouling, vibration, problems in liquid lifting, conditions that can affect air-cooled exchangers, conditions that can affect a wetted-surface air-cooled heat exchanger, or the like. An operating condition or mode may be adjusted to prolong equipment life or avoid equipment failure.

An evaporator (1) for vaporizing a substance into its gaseous form, which comprises at least a plate pack (4) functioning as an evaporator and a droplet separator arranged inside the outer casing. An outlet connection (6) for leading the vaporised substance out from the outer casing is arranged to an end plate of outer casing, and said outlet connection (6) is connected to a suction duct (10) arranged inside the outer casing in a longitudinal direction of the shell, and said suction duct (10) comprises openings (12) at the upper surface of the suction duct, wherein the droplet separator is constructed at both sides of the suction duct (10).

A dual fluid heat exchange system is presented that provides a stable output temperature for a heated fluid while minimizing the output temperature of a cooled fluid. The heated and cooled fluids are brought into thermal contact with each other within a tank. The output temperature of the warmed fluid is maintained at a stable temperature by a re-circulation loop that connects directly to the mid portion of the tank such that the re-circulated fluid flow primarily warms only a re-circulation section of the tank. The other, lower flow rate, section of the tank may be positioned so that it has a cooler temperature and thus serves to increase the efficiency of the heat exchange by extracting extra heat energy out of the cooled fluid before it leaves the tank. Alternatively, the low flow rate section of the tank may be warmer than the re-circulated section, and thus allow the re-circulated section to be cooler than the output temperature of the warmed fluid.