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EP0130110A1 - Wärmetauscher für kontinuierliche Kristallisation - Google Patents

Wärmetauscher für kontinuierliche Kristallisation Download PDF

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Publication number
EP0130110A1
EP0130110A1 EP84401242A EP84401242A EP0130110A1 EP 0130110 A1 EP0130110 A1 EP 0130110A1 EP 84401242 A EP84401242 A EP 84401242A EP 84401242 A EP84401242 A EP 84401242A EP 0130110 A1 EP0130110 A1 EP 0130110A1
Authority
EP
European Patent Office
Prior art keywords
tubes
heat exchanger
tube
steam
exchanger according
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.)
Withdrawn
Application number
EP84401242A
Other languages
English (en)
French (fr)
Inventor
Raymond Binet
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.)
Fives Cail Babcock SA
Original Assignee
Fives Cail Babcock SA
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 Fives Cail Babcock SA filed Critical Fives Cail Babcock SA
Publication of EP0130110A1 publication Critical patent/EP0130110A1/de
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B30/00—Crystallisation; Crystallising apparatus; Separating crystals from mother liquors ; Evaporating or boiling sugar juice
    • C13B30/02—Crystallisation; Crystallising apparatus
    • C13B30/022—Continuous processes, apparatus therefor
    • 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
    • F28D7/06—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 having a single U-bend

Definitions

  • the present invention relates to an exchanger for continuous crystallization, for the production of crystals by evaporation of a solution, in particular of sweet juice, heated with steam.
  • the main object of the invention is to eliminate the above-mentioned drawbacks.
  • a more specific subject of the invention is a heat exchanger for continuous crystallization, for the production of tion of crystals by evaporation of a solution, in particular of sweet juice, heated with steam, characterized in that it comprises a bundle of hairpin tubes divided into groups, each group being constituted by at least one tube, the plane of the or each tube being inclined so that the inlet branch of the steam is at a level higher than that of the outlet branch of the condensed water, said branches being substantially horizontal, in that the groups are superimposed so as to form, along the length of the exchanger, parallel vertical rows, two adjacent rows being separated by a certain interval, and in that the ends of the tubes are fixed in a support plate on the outside of which is provided a vertical partition alternately separating the inlet ports and the outlet ports of the tubes.
  • Said partitioning defines vertically elongated boxes, all the boxes relating to the orifices of the same function communicating with each other.
  • a cover closes all of the boxes, a steam inlet pipe being integral with said cover.
  • Each group advantageously consists of a plurality of tubes, three for example, whose elbows have different bending radii so that they can be arranged one inside the other.
  • the tubes are advantageously fixed to the tube plate by expansion.
  • FIG 1 we see the entire exchanger contained in a ferrule 1 horizontally elongated.
  • the reference 2 designates the heat exchange bundle placed in the lower half of the shell 1 where it is covered by the solution (sweet juice, for example) which reaches level N.
  • This bundle consists of tubes with pins at hair whose ends are fixed in a tubular plate 3.
  • Transversal partitions, such as 4, which support the tubes divide the heat exchanger longitudinally into a plurality of compartments, such as 5, supplied individually with concentrated sweet juice by the pipes, such as 6, 7 and 9.
  • the compartment end containing the bends of the tubes is further supplied, by the pipe 8, with a seed magma essentially constituted by small crystals suspended in supersaturated juice.
  • the reference 10 designates a deflecting plate which obstructs the liquid droplets, while the steam escapes through the outlet 11 connected to a dome 12.
  • the heating steam is introduced along V into the bundle 2 while the condensed steam is discharged along C.
  • the introduced liquid circulates through the bundle 2 by means of a usual baffle system not shown.
  • a mixture of crystals and mother liquor is collected at M, at the base of the end compartment opposite to that containing the elbows of the tubes, which it is easy to separate by centrifugation.
  • each group G taken as an example comprises three tubes 13, 13 ′ and 13 ". These tubes have different bending radii so that they can be arranged one inside the As shown on the right of FIG. 3, the tube 13 has a bending radius greater than that of the tube 13 'and the latter has a bending radius greater than that of the tube 13 ". All these tubes have their horizontal branches, but their planes are inclined so that the inlet branch of the steam is at a level higher than that of the outlet branch of the condensates. This arrangement has the advantage of promoting flow and preventing condensate from stagnating in the loops of the tubes. Indeed these loops ensure the unevenness of the branches and consequently, the inclination of the plane of each tube.
  • the groups such as group G which we have just defined are superimposed so as to form a vertical row RI which extends along the length of the exchanger. According to the width of the latter are arranged rows R identical; two adjacent rows such as RI and R2 are separated by a certain interval d.
  • a row R the height spacings between the branches of the tubes 13, 13 'or 13 "must be determined to leave sufficient space between each of the tubes with the same reference.
  • the inclination of the tubes 13, 13 'and 13 " would preferably be identical.
  • the fact of accommodating a maximum of tubes in the available volume leads to adopt for the 13 "tube the shortest possible bending radius compatible with the diameter and the thickness of this tube.
  • tubes 13 In this case it may be wise to give to these tubes 13 "have a greater inclination than for tubes 13 and 13 '.
  • the tubes 13 and 13 ′ have the same inclination, the tube 13 ′ being surrounded by the tube 13 with the near offset in height.
  • the 13 "tube is much more inclined than the preceding ones which surround it.
  • the 13" tube cannot however be contained in a vertical plane.
  • a cover 14 provided with stiffeners, such as 15, closes the exchanger. This cover allows mounting and possible dismantling in case of tube replacement.
  • a steam box 100 compartmentalized by vertical partitions such as 16, alternately separating the inlet ports and the outlet ports of the tubes. These partitions define alternate steam and condensate chambers, said chambers being vertically elongated. Partitions 16 have the same height as the belt 107 of the steam box 100.
  • FIG. 4 On the right-hand side of FIG. 4 a distinction is made between the steam chambers 101, 103 and 105 as well as the condensate chambers 102, 104 and 106. On the left-hand side of the figure are symmetrical chambers.
  • the only box 106 is a double box common to the two half-widths of the beam.
  • the steam box 100 is closed by a cover 17, the bottom wall 19 of which is fitted with a seal 108 bearing both on the belt 107 and on the edges of the partitions 16.
  • the boxes 101 to 106 are thus isolated from each other.
  • the cover 17 ensures the arrival of steam to the boxes such as 101, 103 and 105 and the exit of the light noncondensables from the boxes such as 102, 104 and 106.
  • the condensate outlet is directly ensured by the pipe 21 provided at the lower part of the belt 107 of the box 100 (see fig. 4 and 7).
  • the cover 17 is provided with a steam inlet pipe 18. Between the inner end of the tube 18 and the bottom wall 19 of the cover which closes the aforementioned boxes, a transverse channel 20 is provided which brings steam to the boxes such as 101, 103 and 105 through orifices, respectively 51, 53, 55 made in said bottom wall 19.
  • This same cover 17 is also provided with the pipes 23 opening at the top point of the boxes such as 102, 104 and 106 and counterparts boxes of the left part of FIG. 4 for the exit of the light noncondensable.
  • the other boxes are delimited at their lower part by an inclined plane.
  • the condensates and the heavy incondensables of the caissons 102 and 104 and of their counterparts on the left of FIG. 4 are brought to the central caisson 106 along this slope via passages 33 and 35 passing through respectively.
  • the boxes 103 and 105 along said inclined plane.
  • the heavy incondensables from all the boxes 102, 104, 106 and their counterparts from the left-hand side of FIG. 4 are finally extracted by the tube 22 provided on the wall 19 of the cover 17.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Organic Chemistry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
EP84401242A 1983-06-20 1984-06-18 Wärmetauscher für kontinuierliche Kristallisation Withdrawn EP0130110A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8310137A FR2548346A1 (fr) 1983-06-20 1983-06-20 Echangeur de chaleur pour cristallisation continue
FR8310137 1983-06-20

Publications (1)

Publication Number Publication Date
EP0130110A1 true EP0130110A1 (de) 1985-01-02

Family

ID=9289936

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84401242A Withdrawn EP0130110A1 (de) 1983-06-20 1984-06-18 Wärmetauscher für kontinuierliche Kristallisation

Country Status (7)

Country Link
EP (1) EP0130110A1 (de)
JP (1) JPS6062590A (de)
AU (1) AU2949584A (de)
DK (1) DK297684A (de)
ES (1) ES288725Y (de)
FR (1) FR2548346A1 (de)
ZA (1) ZA844679B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2516408Y2 (ja) * 1990-04-27 1996-11-06 昭和アルミニウム株式会社 熱交換器

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1810165A (en) * 1928-09-24 1931-06-16 O E Frank Heater & Engineering Heat interchanger
FR1035120A (fr) * 1951-04-05 1953-08-17 élément d'échangeur thermique
DE948692C (de) * 1951-09-04 1956-09-06 Metallgesellschaft Ag Waermeaustausch mit U-foermigen Rohren
US2869834A (en) * 1956-04-10 1959-01-20 Patterson Kelley Co Heat exchanger
US3360037A (en) * 1965-08-24 1967-12-26 Babcock & Wilcox Co Heat exchanger u-bend tube arrangement
FR2154898A6 (de) * 1971-09-29 1973-05-18 Fives Lille Cail
DE2439008A1 (de) * 1974-08-14 1976-02-26 Le Vi Projektirowaniju Organis Roehrenkesselwaermeaustauscher
EP0013621A1 (de) * 1979-01-08 1980-07-23 Westinghouse Electric Corporation Wärmetauscher mit vergrösserter innerer U-förmiger Rohrreihe
FR2508672A1 (fr) * 1981-06-24 1982-12-31 Fives Cail Babcock Procede et systeme de regulation d'un appareil de cristallisation a marche continue notamment pour la production de sucre

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1810165A (en) * 1928-09-24 1931-06-16 O E Frank Heater & Engineering Heat interchanger
FR1035120A (fr) * 1951-04-05 1953-08-17 élément d'échangeur thermique
DE948692C (de) * 1951-09-04 1956-09-06 Metallgesellschaft Ag Waermeaustausch mit U-foermigen Rohren
US2869834A (en) * 1956-04-10 1959-01-20 Patterson Kelley Co Heat exchanger
US3360037A (en) * 1965-08-24 1967-12-26 Babcock & Wilcox Co Heat exchanger u-bend tube arrangement
FR2154898A6 (de) * 1971-09-29 1973-05-18 Fives Lille Cail
DE2439008A1 (de) * 1974-08-14 1976-02-26 Le Vi Projektirowaniju Organis Roehrenkesselwaermeaustauscher
EP0013621A1 (de) * 1979-01-08 1980-07-23 Westinghouse Electric Corporation Wärmetauscher mit vergrösserter innerer U-förmiger Rohrreihe
FR2508672A1 (fr) * 1981-06-24 1982-12-31 Fives Cail Babcock Procede et systeme de regulation d'un appareil de cristallisation a marche continue notamment pour la production de sucre

Also Published As

Publication number Publication date
JPS6062590A (ja) 1985-04-10
ES288725Y (es) 1986-10-01
DK297684D0 (da) 1984-06-18
DK297684A (da) 1984-12-21
FR2548346A1 (fr) 1985-01-04
ZA844679B (en) 1985-09-25
AU2949584A (en) 1985-06-13
ES288725U (es) 1986-03-01

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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Effective date: 19850128

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Inventor name: BINET, RAYMOND