In order to improve the transfer of heat from a warm fluid inside a heat exchanger tube (333) including an elongated tube with a wall with an exterior surface and an interior surface, the interior surface is provided with at least one longitudinally extending interior wall (363, 363) which extends from one side of the interior surface towards another side of the interior surface.

A stave comprising an outer housing, an inner pipe circuit comprising individual pipes housed within the outer housing, wherein the individual pipes each has an inlet end and an outlet end and wherein each pipe may or may not be mechanically connected to another pipe, and a manifold, integral with or disposed on or in the housing; wherein the inlet and/or outlet ends of each individual pipe is disposed in or housed by the manifold. The manifold may be made of carbon steel while the housing may be made of copper. Each of the inlet and outlet ends of each individual pipe may be surrounded in part by cast copper within a housing of the manifold.

A quench-cooling system has a primary quench cooler as a double-tube heat exchanger, a tube bundle heat exchanger as a secondary quench cooler. A tube bundle is enclosed by a casing, forming a casing room, which is formed between tube sheets arranged at spaced locations. Bundle tubes are held with the tube sheets. Parallel cooling channels, connected with one another, have a rectangular tunnel geometry formed (i) from the thin tube sheet, separating a gas side from a water/steam side and connected to a ring flange, which is connected to the casing of the enclosed tube bundle; (ii) from parallel webs, arranged on the tube sheet, separating individual water/steam flows from one another; and (iii) from a covering sheet, provided with openings for bundle tubes and defining the flow in the tunnel arrangement of the cooling channels.

An array includes a plurality of refractory bricks, each having a substantially tubular body including a first end, an opposed second end, a central bore extending from the first end to the second end along the longitudinal length thereof and defining an inner surface of the refractory brick, and an outer surface extending from the first end to the second end along the longitudinal length thereof. The outer surface of each refractory brick has a shape that transitions axially between a plurality of hexagonal portions and non-hexagonal portions along the longitudinal lengths thereof, and the plurality of refractory bricks are arranged and interlocked with one another in a vertical and horizontal manner via mating members provided on the hexagonal portions of the outer surfaces thereof. A continuous plenum space is defined by the non-hexagonal portions of the refractory bricks arranged in the array.

The present invention relates to the field of fluid heat transfer, and discloses a heat transfer enhancement pipe as well as a cracking furnace and an atmospheric and vacuum heating furnace including the same. The heat transfer enhancement pipe (1) includes a pipe body (10) of tubular shape having an inlet (100) for entering of a fluid and an outlet (101) for said fluid to flow out; internal wall of the pipe body (10) is provided with a fin (11) protruding towards interior of the pipe body (10), wherein the fin (11) has one or more fin sections extending spirally in the axial direction of the pipe body (10), and each fin section has a first end surface facing the inlet (100) and a second end surface facing the outlet (101), at least one of the first end surface and the second end surface of at least one of the rib sections is formed as a transition surface along spirally extending direction. The heat transfer enhancement pipe can reduce thermal stress of itself, thereby increasing service life of the heat transfer enhancement pipe.

A box style steam methane reformer has plural sections, with each section having walls forming an interior cavity and open ends that communicate with the interior cavity. Each section has a feedstock supply pipe and a fuel supply pipe located along the top wall, as well as a syngas collection pipe and a flue gas collection duct located outside of the bottom wall. The pipes and ducts have ends that are aligned with each other to allow the sections to be assembled together. Burners are located in the interior cavity and are connected to the fuel supply pipe. Reactor tubes extend through the interior cavity. The bottom ends are supported by the syngas collection pipe and the top ends are spring supported to allow for expansion and contraction. Refractory members are located in the interior cavity and across a slot leading to the flue gas collection dust. The spacing between the refractory members varies to control the flow of flue gas.

A stave comprising a housing, an inner cooling fluid circuit comprising a cooling fluid inlet, a cooling fluid outlet and one or more cooling fluid pipes housed within, or cooling fluid passageways defined by, the housing, wherein each cooling fluid pipe and/or passageway is in direct or indirect fluid communication with the cooling fluid inlet and the cooling fluid outlet; and a manifold, integral with or disposed on or in the housing, that provides support for installation of the stave on a furnace shell; wherein the manifold has one or more inlet pipes, or defines one or more inlet passageways, for providing cooling fluid to the cooling fluid inlet of the cooling fluid circuit of the housing; and wherein the manifold has one or more outlet pipes, or defines one or more outlet passageways, for receiving cooling fluid from the cooling fluid outlet of the cooling fluid circuit of the housing.

The campaign lives are extended and the risks of process gas leaks past seals are reduced by improved stave coolers that each hang together inside steel shelled furnaces by a single neck extended out through a steel jacketed collar. All the coolant circuits inside the stave cooler are collected and grouped together to pass inside through the one collar. The steel in the collar is matched to the steel used in the containment shell, and a matching steel weld seals them together. Thermal stresses are thereby prevented from accumulating over separation distances as a consequent of the steel's coefficient of expansion. A single point of penetration has no separation distance to another.

An apparatus and a method for heating process media in a fiber molding process are described, whereby an optimization of the efficiency in the production of three-dimensional molded parts from a fiber-containing material is provided. Here, a process medium with a relatively high temperature is guided through an apparatus for heat exchange within a container with another process medium.

Cast-iron and cast-copper stave coolers improve the campaign lives of furnaces with steel shelled vessels. Each stave cooler has a single rectangular body with one-only protruding neck on its back that includes a steel collar adaptor. All the coolant piping passes in a group through the protruding neck from two or more independent coolant circuits inside the stave body. Such stave coolers are configured to depend entirely for all their vertical mechanical support on a single hanging of the protruding neck as a through-bulkhead in a single corresponding penetration of the containment shell. Thus, a single annular welded steel-to-steel gas seal around the through-bulkhead is all that's needed inside the steel containment shell for each stave cooler. Coolant piping is laid flat in a single common layer, inside to a hot face. Cast-copper stave cooler hot faces include an abrasion resistant layer that extends campaign lives beyond ten years.