EP0203445B1 - Echangeur de chaleur entre gaz brut et gaz épuré - Google Patents

Echangeur de chaleur entre gaz brut et gaz épuré Download PDF

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Publication number
EP0203445B1
EP0203445B1 EP86106484A EP86106484A EP0203445B1 EP 0203445 B1 EP0203445 B1 EP 0203445B1 EP 86106484 A EP86106484 A EP 86106484A EP 86106484 A EP86106484 A EP 86106484A EP 0203445 B1 EP0203445 B1 EP 0203445B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
gas
duct
raw gas
crude gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP86106484A
Other languages
German (de)
English (en)
Other versions
EP0203445A1 (fr
Inventor
Winfried Dipl.-Ing. Ganzer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0203445A1 publication Critical patent/EP0203445A1/fr
Application granted granted Critical
Publication of EP0203445B1 publication Critical patent/EP0203445B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • 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
    • F28D7/08—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 otherwise bent, e.g. in a serpentine or zig-zag
    • 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
    • F28D7/08—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 otherwise bent, e.g. in a serpentine or zig-zag
    • F28D7/082—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 otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
    • F28D7/085—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 otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration in the form of parallel conduits coupled by bent portions
    • F28D7/087—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 otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration in the form of parallel conduits coupled by bent portions assembled in arrays, each array being arranged in the same plane

Definitions

  • the invention relates to a raw gas-pure gas heat exchanger, in particular for dust-laden raw gas, with heat exchanger tubes through which the clean gas flows in a substantially vertical, open at the bottom and exposed to the top with raw gas channel, which together with the heat exchanger tubes in a closed on all sides, on upper end is provided with a raw gas outlet line container.
  • Heat exchangers in which hot gas as the primary medium heats up another gas serving as the secondary medium are known. It is also known that the secondary medium is heated as much as possible when it flows through the heat exchanger in countercurrent to the primary medium.
  • gases which are heavily dust-laden such as those which arise in particular behind coal dust furnaces, fluidized bed furnaces, or also coal gasifiers
  • These are not always only deposits of soot, dust and ash particles, but especially behind coal gasifiers also the desublimation of NH 4 CI and deposits that can be attributed to thermophoretic effects.
  • a heat exchanger is already known from DE-OS 1 501 682, in which both media, the medium to be heated and the medium to be cooled, can be gases.
  • the heat exchanger tubes are arranged in a channel which is acted upon from above with the other medium and is essentially vertical and is arranged in different tube field planes which are connected to one another via curved tube bends.
  • the channel is provided with an outlet opening at its lower end and is arranged in a container which in turn is equipped with an outlet opening for this other medium at its upper end. It is a peculiarity of this heat exchanger that it can only be used for pure gases, because it would easily decompose in the case of dust-containing gases below the duct and on the various pipe field levels.
  • the invention has for its object to develop a raw gas-pure gas heat exchanger, which is particularly adapted to the operating conditions when using very dusty raw gases.
  • the lowest possible temperature difference between the incoming hot raw gas and the emerging secondary medium, the clean gas, should be achieved.
  • the clean gas flows through the heat exchanger tubes and the dust-laden raw gases flow around these heat exchanger tubes in countercurrent from the outside.
  • clogging of the narrow heat exchanger tubes is avoided without the flow rate in them needing to be increased unnecessarily high.
  • the heat exchanger tubes in addition to their installation in planes parallel to one another and to the axis of symmetry of the channel, are connected at the lower end of the channel to an input collector and at the upper end of the channel to an output collector. In the event of a defect in one of the heat exchanger tubes, this can then be cut off at easily accessible locations at the upper or lower end of the channel, pulled out and replaced with a new heat exchanger tube.
  • a thermally particularly favorable solution results if the input collector is arranged in the interior of the channel in a development of the invention. In this case, its relatively large surface is flown directly by hot flue gases, so that no heat loss can occur in this area.
  • the raw gas inlet line 3 opening concentrically from above and its expansion into an essentially rectangular channel 4 inside the pressure vessel 2 of the raw gas clean gas heat exchanger 1.
  • the meandering heat exchanger tubes 5 which are connected to an outlet header 7 for the clean gas at the lower, open end of the channel, are indicated.
  • the inlet header 6 and the outlet header 7 are each connected to a separate clean gas line 8, 9.
  • the upper end of the pressure vessel 2 of the raw gas-pure gas heat exchanger 1 is bottle-shaped and encloses the raw gas inlet line 3. In this area, a raw gas outlet line 10 is led out laterally.
  • the pressure vessel. 2 cylindrical, while the channel 4 carrying the heat exchanger tubes 5 has a substantially rectangular cross section. 2 that the heat exchanger tubes 5 are guided in mutually parallel planes arranged parallel to the axis of symmetry of the channel 4.
  • the hot, dust-laden raw gas flows from above via the raw gas inlet line 3 into the channel 4 of the raw gas-pure gas heat exchanger. It flows past the meandering curved heat exchanger tubes 5 and gives off its heat to the clean gas flowing through the heat exchanger tubes 5.
  • the raw gas is deflected by 180 ° in order to flow inside the pressure vessel 2 on the outside of the channel 4 to the upper end of the raw gas-pure gas heat exchanger and then into the raw gas outlet line 10.
  • the sharp deflection at the lower end of the channel 4 separates entrained particles of all kinds from the raw gas. They fall onto the funnel-shaped bottom 11 of the pressure vessel 2.
  • this raw gas-pure gas heat exchanger 1 It is a great advantage of this raw gas-pure gas heat exchanger 1 that a large part of the particles transported by the raw gas past the heat exchanger tubes 5 and at the lower end of the channel 4 separated by 180 ° from the raw gas and finally into the funnel-shaped bottom 11 of the Pressure vessel 2 falls. This significantly reduces the cost of gas dedusting. The same also applies to the dust particles which had settled on the individual meanders of the heat exchanger tubes 5 and were blown down again by the raw gas flowing in. They can be withdrawn from the ash lock 12 from time to time. The essentially cleaned and cooled to 150 ° raw gas can then be fed via the raw gas outlet line 10 for further use.
  • the pipe-free guidance of the heat exchanger tubes 5 in two-dimensional, parallel planes enables the unobstructed use of sootblowers and other cleaning devices. It also allows the subsequent exchange of entire heat exchanger tubes, which can be cut off or welded on at the inlet and outlet header 6, 7 for this purpose.
  • the raw gas inlet line 13 leads vertically from above into the pressure vessel 14 of the raw gas-pure gas heat exchanger 15 and is the rectangular one arranged centrally in the pressure vessel 14 Channel 16 kept open at the lower end.
  • the pressure vessel 14 also encloses the raw gas inlet line 13 in the same way as was described with reference to FIG. 1.
  • the raw gas outlet line 17 is also connected here from the upper end of the pressure vessel 14.
  • the design of the inlet header 18 and the routing of the heat exchanger tubes 19 also correspond to the exemplary embodiments in FIGS. 1 and 2. However, in a departure from the exemplary embodiment in FIG.
  • the clean gas outlet collector 20 is guided inside and not outside the channel 16 and is therefore flushed with hot raw gas.
  • the two risers 21, 22 on both sides of the outlet header 20 meet in the middle above the outlet header in the region of the axis of symmetry 23 of the raw gas-pure gas heat exchanger 15 in the raw gas inlet line 13. They become a mirror image of the raw gas outlet line 17 from the raw gas Channel 13 and the pressure vessel 14 led out.
  • this variant which has a positive effect in particular in the case of smaller temperature differences between the heated clean gas and the raw gas which has entered, it is avoided that the heated clean gas flowing into the outlet collector 20 heats the be already gives off cooled raw gas. Instead, the risers of the outlet header 20 are flushed with the hot raw gas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (6)

1. Echangeur de chaleur entre gaz brut et gaz épuré (1, 15), notamment du gaz brut chargé de poussière, comprenant des échangeurs de chaleur (5, 19) parcourus par du gaz épuré et disposés dans un canal (4, 16), essentiellement vertical ouvert vers le bas, alimenté par le haut en gaz brut et qui est disposé avec les tubes d'échangeur de chaleur (5, 19) dans une cuve (2, 14) fermée de tous côtés et munie à l'extrémité supérieure d'un conduit de sortie du gaz brut (10, 17), caractérisé en ce que les tubes d'échangeur de chaleur (5, 19) sont disposés, en s'étendant en forme de méandres, dans des plans différents, parallèles entre eux et à l'axe de symétrie (23) du canal, et sont raccordés à l'extrémité supérieure du canal (4, 16) à un collecteur d'entrée (6, 18) et à l'extrémité supérieure du canal à un collecteur de sortie (7, 20), le fond (11) de la cuve (2, 14) étant constitué en forme de trémie et étant muni d'un dispositif d'évacuation des cendres (12) au point le plus bas du fond de la cuve (2, 14).
2. Echangeur de chaleur entre du gaz brut et du gaz épuré suivant la revendication 1, caractérisé en ce que le collecteur de sortie (20) est disposé à l'intérieur du canal (16).
3. Echangeur de chaleur entre du gaz brut et du gaz épuré, suivant la revendication 1, caractérisé en ce que le collecteur d'entrée est disposé à l'intérieur du canal.
4. Echangeur de chaleur entre du gaz brut et du gaz épuré, suivant la revendication 1, caractérisé en ce que le conduit de sortie du gaz brut (10, 17) entoure concentriquement le conduit d'entrée du gaz brut (3, 13).
5. Echangeur de chaleur entre du gaz brut et du gaz épuré, suivant la revendication 1, caractérisé en ce que le canal (4, 16) a une section transversale rectangulaire.
6. Echangeur de chaleur entre du gaz brut et du gaz épuré, suivant la revendication 1, caractérisé en ce que la cuve (2, 14) a une section transversale cylindrique.
EP86106484A 1985-05-24 1986-05-13 Echangeur de chaleur entre gaz brut et gaz épuré Expired EP0203445B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3518842 1985-05-24
DE3518842 1985-05-24

Publications (2)

Publication Number Publication Date
EP0203445A1 EP0203445A1 (fr) 1986-12-03
EP0203445B1 true EP0203445B1 (fr) 1989-12-20

Family

ID=6271635

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86106484A Expired EP0203445B1 (fr) 1985-05-24 1986-05-13 Echangeur de chaleur entre gaz brut et gaz épuré

Country Status (5)

Country Link
US (1) US4706742A (fr)
EP (1) EP0203445B1 (fr)
JP (1) JPH0615949B2 (fr)
CA (1) CA1271187A (fr)
DE (1) DE3667724D1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5172760A (en) * 1990-12-24 1992-12-22 Uop Heat exchange apparatus for separating a resin phase from a solvent solution containing a solvent, demetallized oil and a resin
DE29510720U1 (de) * 1995-07-01 1995-09-07 BDAG Balcke-Dürr AG, 40882 Ratingen Wärmetauscher
FR2869979B1 (fr) * 2004-05-06 2006-08-04 Packinox Sa Echangeur thermique a plaques
FI20095566A (fi) * 2009-05-22 2010-11-23 Metso Power Oy Palamisilman esilämmitin ja voimalaitos
JP2012007761A (ja) * 2010-06-22 2012-01-12 Toshiba Corp 熱交換器および熱交換器の管台

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE365846C (de) * 1921-11-19 1922-12-22 Albert Methfessel Kuehlvorrichtung fuer Kraftfahrzeuge, Flugzeuge u. dgl.
US1725322A (en) * 1927-06-08 1929-08-20 Vezie Melbourne Euguene Heating apparatus
GB603467A (en) * 1945-11-29 1948-06-16 Goetaverken Ab Improvements in heat exchangers
GB653540A (en) * 1947-07-02 1951-05-16 Comb Eng Superheater Inc Improvements in steam boilers and like heat exchangers
US2703225A (en) * 1951-05-31 1955-03-01 Holly Sugar Corp Heat transfer apparatus for granular material
DE961629C (de) * 1952-12-31 1957-04-11 Parsons C A & Co Ltd Waermeaustauscher
US2967047A (en) * 1953-10-28 1961-01-03 Babcock & Wilcox Co Heat exchange apparatus having centrifugal fan
FR1161500A (fr) * 1956-09-28 1958-09-01 Stein & Roubaix échangeur thermique à faisceaux tubulairees multiples
FR1351602A (fr) * 1962-12-29 1964-02-07 Babcock & Wilcox France Perfectionnements aux échangeurs de chaleur de récupération
AT266887B (de) * 1964-04-06 1968-12-10 Waagner Biro Ag Wärmetauscher
US3406747A (en) * 1966-01-18 1968-10-22 American Schack Company Inc Heat exchanger having concentric supply and exhaust conduits
FR1557793A (fr) * 1967-12-15 1969-02-21
DE1918171B2 (de) * 1969-04-10 1972-01-05 Gaskuehler zum kuehlen von spaltgas oder synthesegas
GB1379168A (en) * 1972-02-18 1975-01-02 Babcock & Wilcox Ltd Use of heat exchanging furnaces in the recovery of heat in waste gases
US3842904A (en) * 1972-06-15 1974-10-22 Aronetics Inc Heat exchanger
SE409237B (sv) * 1977-11-30 1979-08-06 Stal Laval Apparat Ab Angpanna eller vermevexlare for energiatervinning ur gaser innehallande stoft

Also Published As

Publication number Publication date
CA1271187A (fr) 1990-07-03
EP0203445A1 (fr) 1986-12-03
JPH0615949B2 (ja) 1994-03-02
DE3667724D1 (de) 1990-01-25
US4706742A (en) 1987-11-17
JPS61272590A (ja) 1986-12-02

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