A heat exchanger includes a shell and a plurality of tubes. The shell includes a heat exchange region in which a second refrigerant is to be introduced into the shell, so that a heat exchange occurs between the second refrigerant and a first refrigerant which flows through the plurality of tubes. The shell includes an inlet region through which the first refrigerant is introduced into the shell, a reverse region into which the first refrigerant is introduced, after the first refrigerant passes through the heat exchange region, and an outlet region into which the first refrigerant is introduced, after the first refrigerant passes through the reverse region and the heat exchange region, the first refrigerant being discharged out of the shell from the outlet region. The shell includes partition plates to divide the heat exchange region, the inlet region, the reverse region, and the outlet region.

A system including a quench system that may cool a syngas generated in a gasification chamber. The quench system includes a quench chamber, a dip tube that may direct the syngas from the gasification chamber into a quench liquid to cool the syngas to generate a cooled syngas, and a draft tube disposed circumferentially about the dip tube and that may receive the cooled syngas. A passage is disposed between a first wall of the dip tube and a second wall of the draft tube, and the draft tube includes a tapered configuration in a flow direction along the passage.

A system includes a quench system that may cool a syngas generated in a gasification chamber. The quench system includes a quench chamber, a dip tube that may direct the syngas from the gasification chamber into a quench liquid to cool the syngas to generate a cooled syngas, a draft tube disposed circumferentially about the dip tube and that may receive the cooled syngas in a first direction. A first passage is disposed between a first wall of the dip tube and a second wall of the draft tube. The system also includes a first baffle that may receive the cooled syngas from the first passage. The first baffle may split a flow of the cooled syngas into a first syngas flow and a second syngas flow, and the first baffle may redirect the first syngas flow in a second direction different from the first direction.

A heat exchanger, for example a shell and tube flooded evaporator, has a refrigerant distributor that is positioned at an angle between the bottom of the shell and the sides of the shell, and includes an inlet that is welded to an inlet piping, where the inlet and inlet piping are in fluid communication with the refrigerant distributor, and are in a generally corresponding position orientation. Tubes of a tube bundles may extend proximate the bottom of the shell.

An arc-shaped plate heat exchanger, including a cylindrical housing and a heat-exchanging plate assembly. The heat-exchanging plate assembly includes two groups of arc-shaped heat-exchanging plates symmetrically disposed at either side of the axis of the housing. In each group of the arc-shaped heat-exchanging plate, multiple arc-shaped heat-exchanging plates are arranged from the housing center outward and form isolating first and second fluid channels, the plates' diameters increasing outward. During heat exchange, cold fluid enters the heat exchanger from the housing's first fluid inlet, and flows through straight channels of the arc-shaped heat-exchanging plates to exit from a first fluid outlet, while the hot fluid enters the heat exchanger from a second fluid entrance on the side wall of the housing, and flows through arc-shaped channels of the arc-shaped heat-exchanging plates to exit from a second fluid outlet. Heat exchange between the cold and hot fluid is thus achieved.

There is described a heat exchanger comprising a plurality of tubes arranged parallel with each other in order to form one or more tube bundles axially inserted into a shell. A first fluid, fed through one or more first inlet nozzles flows inside the tubes and a second fluid, fed through at least one second inlet nozzle, flows inside the shell in order to perform the heat exchange with the first fluid through the walls of the tubes. Inside the shell two or more baffles are formed and arranged perpendicularly with respect to the centre axis of the shell. Between each baffle and the inner walls of the shell there is defined a corresponding window constituted by the cross-section for the passage of the second fluid, with a crossing direction parallel with the centre axis of the shell and the tubes, delimited by the free edge of the respective baffle on the one side and by the inner profile of the shell, at the intersection of the shell with the plane of the baffle, on the other side. The cross-section for the passage of the second fluid placed between two adjacent baffles is constant and has a rectangular shape, that is to say, with all the inner angles congruent with each other. Each baffle has a rectangular shape. Each window has a rectangular shape and has no tubes therein.

Disclosed is a heat exchanger that has an internal air flow pattern such as a helical pattern. The heat exchanger includes a shell that encompasses an inner series of heat exchange tubes and an outer series of heat exchange tubes. A baffle sheet is juxtaposed next to the outer series of heat exchange tubes. And the baffle sheet is configured to direct air flow within the heat exchanger in a configuration, such as a helical configuration, from a center of the shell toward an outer region of the shell.

A heat exchanger has a pass baffle which is formed as an enclosure with two openings, one opening for connection to a shell-side fluid opening and one opening for passing heat exchanger tubes.

A system including a quench system that may cool a syngas generated in a gasification chamber. The quench system includes a quench chamber, a dip tube that may direct the syngas from the gasification chamber into a quench liquid to cool the syngas to generate a cooled syngas, and a draft tube disposed circumferentially about the dip tube and that may receive the cooled syngas. A passage is disposed between a first wall of the dip tube and a second wall of the draft tube, and the draft tube includes a tapered configuration in a flow direction along the passage.

A system includes a quench system that may cool a syngas generated in a gasification chamber. The quench system includes a quench chamber, a dip tube that may direct the syngas from the gasification chamber into a quench liquid to cool the syngas to generate a cooled syngas, a draft tube disposed circumferentially about the dip tube and that may receive the cooled syngas in a first direction. A first passage is disposed between a first wall of the dip tube and a second wall of the draft tube. The system also includes a first baffle that may receive the cooled syngas from the first passage. The first baffle may split a flow of the cooled syngas into a first syngas flow and a second syngas flow, and the first baffle may redirect the first syngas flow in a second direction different from the first direction.