Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D7/0041—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for only one medium being tubes having parts touching each other or tubes assembled in panel form
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D7/0008—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
  • F28D7/163—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
  • F28D7/1669—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing the conduit assemblies having an annular shape; the conduits being assembled around a central distribution tube
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
  • F28F9/007—Auxiliary supports for elements
  • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
  • F28F9/0132—Auxiliary supports for elements for tubes or tube-assemblies formed by slats, tie-rods, articulated or expandable rods
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
  • F28F9/02—Header boxes; End plates
  • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
  • F28F9/027—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes
  • F28F9/0275—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes with multiple branch pipes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
  • F28F2265/26—Safety or protection arrangements; Arrangements for preventing malfunction for allowing differential expansion between elements

Definitions

• the present invention relates to a heat exchange device for cooling a gas, comprising a channel and one or more heat exchange surfaces disposed in the channel, supported by a support structure.
• Such heat exchangers are for example used in
• syngasification processes for the production of synthetic gas, or syngas.
• carbonaceous feedstock is partially oxidised in a reactor.
• Syngas leaving the reactor typically has a temperature of 1300-1600 0 C.
• the hot syngas is quenched to temperatures between 100-700 0 C and is then transported to a coiled heat exchanger, generally comprising a number of parallel coiled tubes.
• Support structures are used to support the heat exchange surfaces within the channel formed by the channel wall. Differences in thermal expansion of the various parts complicate possible support constructions. Sliding bearings can be used, allowing some degree of freedom of movement, but such bearings are difficult to realize and less reliable under the circumstances in such reactors.
• US 5,482,110 discloses a heat exchanger for cooling syngas from a partial combustion reactor comprising nested heat exchange surfaces carried by a support. Such a support structure may induce high local stress peaks.
• a heat exchange device comprising: a channel wall defining a flow channel;
• each heat exchange surface embedding one or more flow paths for a fluid heat exchange medium, and comprising supply and discharge connections for the supply and discharge of the fluid heat exchange medium;
• the support structure comprises a plurality of arms extending from a central crossing to the channel wall .
• the heat exchange surfaces can rest on the support structure, or the heat exchange surfaces can hang down from the support structure.
• the one or more heat exchange surfaces can be connected to the support structure, e.g., by welding joints.
• the support structure can be joined to the channel wall, or to a load bearing structure within the channel wall.
• the device can for instance have a number of nested heat exchange surfaces of a closed geometry, e.g., of a cylindrical geometry, as is disclosed in US 5,482,110.
• the heat exchange surfaces can be coaxially arranged or nested within the channel wall, which will typically be cylindrical.
• the support structure can support a series of two or more bundles of nested heat exchange surfaces.
• the fluid heat exchange medium is water, although any other type of aqueous or non-aqueous coolant can be used if so desired.
• the support structure may for example have three or more arms, e.g., four or more arms to form a cross. If so desired a higher number of arms can be used.
• the support structure can comprise a plurality of embedded parallel inner channels each being in open connection with one of the flow paths in the heat
• the inner channels are preferably evenly distributed and equidistantly arranged.
• the inner channels may meander through the arm parts of the support
• each arm of the support structure may comprise :
• first lower arm part with equidistantly arranged parallel flow paths with a first part extending upwardly to a first corner and a second section extending from the first corner in the direction of the crossing section;
• a second lower arm part with equidistantly arranged parallel flow paths having a first section in line with the second section of the respective flow paths in the first part extending to a second corner, and a second section extending upwardly from the second corner;
• the heat distribution with this configuration is such that differences in thermal expansion of the connected parts do not result in high mechanical stress loads.
• the arms of the support structure can for example be formed as blocks or plates embedding inner channels operatively connected to the tubular parts.
• one or more of the arms of the support structure can wholly or partly be composed of tubular parts, optionally in combination with blocks or plates embedding inner channels operatively connected to the tubular parts.
• the height of the support structure can be increased. This way, the support structure can be made stronger without increasing the thickness of the support structure arms, which could result in undesirable high wall temperatures of the support structure.
• the thickness of the arms of the support structure should be sufficient to give the support structure the required carrying capacity. Generally, a wall thickness of 5-20 mm at both sides of an inner channel balances sufficient strength with good heat dissipation capacity.
• the heat exchange surfaces can be assembled as a plurality of nested heat exchange surfaces of a closed geometry whereby the inner heat exchange surface has a greater constructive height than the adjacent outer heat exchange surface so that each heat exchange surface can be rapped from the exterior without the need for
• one or more deflectors arranged within the inner heat exchange surface of the nested set may be used to guide the hot gas flow towards the heat exchange surfaces, in order to cool all of the gas evenly.
• the heat exchange device according to the present invention can for example be a section of a partial combustion reactor for the production of synthetic gas.
• Figure IA shows a longitudinal cross section of a heat exchange device according to the present invention
• Figure IB shows the device of Figure IA in cross section
• Figure 2A shows in side view a support structure of the device of Figure 1;
• Figure 2B shows a plan view of the support
• Figure 3 shows in side view of a second possible embodiment of a support structure according to the invention
• Figure 4 shows a longitudinal cross section of a further possible embodiment of a heat exchange device according to the present invention.
• Figure IA shows in longitudinal cross section a heat exchange section 1 of a partial combustion reactor for the production of syngas.
• the section 1 comprises a cylindrical outer wall 2.
• the outer wall 2 encloses a concentrically arranged inner channel wall or membrane 3 built of parallel tubular pipe lines, schematically represented in the drawing by centrelines.
• the tubular pipe lines of the inner channel wall 3 are welded
• a cooling medium such as water flows through the pipe lines of the channel wall 3.
• the inner channel wall 3 encloses a set of four schematically represented nested coaxial heat exchange surfaces 5a, 5b, 5c, and 5d. In practice, two or more may be used—for example heat exchange surfaces 5a and 5b.
• the heat exchange surfaces 5a - d are built of parallel tubular lines.
• the tubular lines of the heat exchange surfaces 5a - d can be helically wound.
• the inner channel wall or membrane 3 defines a central channel 4a for hot gas flowing downwards along the heat exchange surfaces 5a - d towards a discharge.
• the cooled gas can enter the annular space 4b between the inner channel wall 3 and the outer wall 2. Coolant flowing through the pipe lines of inner channel wall 3 isolates the cool gas in the annular channel 4b from the hot gas in the central channel 4a.
• each inner heat exchange surface 5b - d extends past the lower end 6 of the adjacent outer heat exchange surface 5a - c, respectively. This way, each individual heat exchange surface 5a - d can be cleaned individually by using rapper devices (not shown) .
• Four or more equidistantly arranged coolant discharge lines 7 are provided between the inner channel wall 3 and the outer channel wall 2, as schematically shown in
• discharge lines 7, are four supply lines 9.
• the upper ends 10 of the supply lines 9 pass through the outer wall 2 to form a connection to a coolant supply.
• Coolant feed lines 16 connect the supply lines 9 to the heat exchange surfaces 5a - d.
• the arrangement of the supply lines and discharge lines can also be reversed depending on the cooling media.
• a horizontal support cross 20 has four arms 21 extending from a central crossing 22 to a corresponding coolant discharge line 7.
• the support cross 20 is shown in more detail in Figures 2A and 2B.
• Parallel inner channels 23 run through the arms 21, each inner channel 23 being in open connection with the flow paths in the heat exchange surfaces 5a - d.
• the inner channels 23 are evenly distributed over the corresponding arm 21.
• Each arm 21 comprises a first and a second lower arm part 24, 25 respectively, and an upper arm part 26.
• first lower arm part 24 equidistantly arranged parallel flow paths 27 have a first part 27a extending upwardly to a first corner 27b and a second section 27c extending in the direction of the crossing section 22.
• second lower arm part 25 are embedded
• Two of the four second lower arm parts 25 form a single block, while the other two are formed as separate parts at opposite sides of the block and under right angles with it and are welded to a central section of the block to form a cross, as shown in Figure 2B.
• the flow paths 28 in the second lower arm parts 25 have a first horizontal section 28a in line with the respective flow paths 27c in the first part 24 extending to a second corner 28b, and a second section 28c extending upwardly from the second corner 28b.
• the flow paths 29 in the upper arm parts 26 have a first vertical section 29a in line with the respective flow paths 28 in the second lower arm part 25 extending upwardly to a third corner 29b, and a second section 29c extending from the third corner 29b away from the
• extension parts 30 are rectangular parts with equidistantly arranged inner channels 31 embedded in line with the horizontal channel sections 28c in the upper arm parts 26.
• Blocks 32 are attached to both sides of the extension part 30.
• the blocks 32 are in line with the inner channel wall 3 and have the same curvature.
• the blocks 32 are provided with inner channels 33 which are operatively connected to the tubular lines 4 in the channel wall 3.
• FIG. 3 shows in side view an alternative support cross 40 for a heat exchanger according to the present invention.
• the support cross comprises four arms 41 of equal length forming a cross with a centre part 42.
• Each arm 41 is made of four sections: a lower main section 43, a lower central section 44, an upper centre section 45 and an upper main section 46.
• Inner channels 47a and 47b are embedded in the lower main section 43 with a vertically extending channel section 47a at the lower side of the lower main section 43 and a horizontally extending channel section 47b, extending to a lateral side of the lower main section 43. Three of the channel sections 47b extend towards the adjacent lower central section 44.
• the upper one of channels sections 47b has its upper longitudinal half formed as a pipeline in a rectangular cut-out 48 in the lower main section 43.
• Inner channels 49a and 49b are embedded in the lower central section 44, having horizontal channel sections 49a connected at one end to the channel sections 47b in the lower main section 43, and to vertical channel sections 49b at their other end.
• the lower central section 44 is mirrored by the upper central section 45, which embeds inner channels 50a and 50b, with vertical sections 50a in line with the vertical inner channels sections 49b in lower central section 44.
• Horizontal channels sections 50b lead from the vertical channel sections 50a to the side of the upper central section 45 opposite the centre 22.
• the upper main section 46 is made of three horizontal parallel pipe lines 51 operatively connected to the horizontal channel sections 50b in upper central section 45.
• the pipe lines 51 lead to an extension block 52 with three inner channels 53 connected to the pipe lines 51.
• FIG. 4 shows a heat exchange device 60 similar to the heat exchange device of Figure IA and IB.
• the same reference numbers are used for parts that are the same in both embodiments.
• the heat exchange device in Figure 4 comprises two bundles 61, 62 in line above one another of four nested heat exchange surfaces 61a - d, 62a - d.
• a support cross 63 is used which is thicker than the support cross 20 in Figure IA.

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Geometry (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
• Physical Or Chemical Processes And Apparatus (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (2)

Family

ID=41280445

Family Applications (1)

Country Status (8)

Cited By (2)

Families Citing this family (1)

Citations (1)

Family Cites Families (15)

• 2010
  • 2010-07-06 EP EP10728682.5A patent/EP2452145B1/en active Active
  • 2010-07-06 WO PCT/EP2010/059605 patent/WO2011003889A2/en active Application Filing
  • 2010-07-06 US US13/382,311 patent/US20120125567A1/en not_active Abandoned
  • 2010-07-06 JP JP2012518959A patent/JP2012533042A/ja active Pending
  • 2010-07-06 CN CN201080030683.5A patent/CN102472591B/zh active Active
  • 2010-07-06 KR KR1020127003234A patent/KR20120046236A/ko active Search and Examination
  • 2010-07-06 AU AU2010270297A patent/AU2010270297B2/en active Active
• 2011
  • 2011-12-02 ZA ZA2011/08879A patent/ZA201108879B/en unknown

Patent Citations (1)

Also Published As

Similar Documents

Legal Events