US3837811A - Crystallization apparatus - Google Patents

Crystallization apparatus Download PDF

Info

Publication number
US3837811A
US3837811A US00292858A US29285872A US3837811A US 3837811 A US3837811 A US 3837811A US 00292858 A US00292858 A US 00292858A US 29285872 A US29285872 A US 29285872A US 3837811 A US3837811 A US 3837811A
Authority
US
United States
Prior art keywords
tank
walls
heating means
compartments
sections
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 - Lifetime
Application number
US00292858A
Other languages
English (en)
Inventor
G Windal
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 Lille Cail
Original Assignee
Fives Lille Cail
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 Lille Cail filed Critical Fives Lille Cail
Application granted granted Critical
Publication of US3837811A publication Critical patent/US3837811A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0018—Evaporation of components of the mixture to be separated
    • B01D9/0031—Evaporation of components of the mixture to be separated by heating

Definitions

  • the neighboring cells in each compartment also communicate with each other, as does each cell laterally adjacent the tank walls with a like cell upstream or downstream, the ports in the dividing walls being so arranged that the product in the tank circulates therethrough in a sinuous path.
  • Radiators are positioned in the lower part of the tank and pass through all compartments, the radiators being divided into several sections each positioned in one of the cells and forming in each cell a return passage for the product under the radiators.
  • the present invention relates to improvements in crystallization apparatus for crystallizing the solute of a solution by evaporating the solvent of the solution in a continuous operation.
  • Known apparatus of this type comprises a substantially cylindrical tank having a horizontally extending longitudinal axis, a plurality of transverse walls separating the tank into a plurality of compartments, with each wall defing port means whereby the compartments are in communication, and heating means positioned in the lower part of the tank and passing through all the compartments.
  • the heating means are constituted by vertical radiators or plates parallel to each other.
  • each cell laterally adjacent the tank Walls communicates with the like cell of the downstream compartment through respective ones of the port means, and the port means is so arranged that the solution and crystallized solute circulates through the tank in a sinuous path.
  • the heating means is divided into several sections each positioned in one of the cells and so spaced from at least one of the walls of the cells as to form in each cell a return passage for the solution and crystallized solute under the heating means.
  • the heating means is constituted by vertical plates or radiators parallel to the longitudinal axis of the tank and common to several compartments, the corresponding longitudinally extending dividing walls in all of these compartments may be aligned and the heating means sections are transversely spaced from one another. Those dividing walls which are disposed in the plane of the radiator plates may, in part, be formed by these plates.
  • the heating means is divided into two sections disposed symmetrically in respect of a longitudinal plane of symmetry of the tank, and each section is sub-divided into two subsections by a respective one of walls parallel to the longitudinal axis.
  • the heating means is divided into a central section disposed symmetrically in respect of the plane of symmetry and two lateral sections disposed symmetrically in respect of this plane, and two walls parallel to the longitudinal axis are disposed between the central section and the lateral sections.
  • one of the walls parallel to the longitudinal axis may be disposed in the plane of symmetry.
  • one of the parallel to the longitudinal axis may be disposed in the plane of symmetry.
  • FIG. 1 is a transverse section of one embodiment of the crystallization apparatus according to this inventron;
  • FIG. 2 is a longitudinal section along line II-II of FIG. 1;
  • FIG. 3 is a view similar to that of FIG. 1 of another embodiment.
  • the crystallization apparatus is shown to comprise a substantially cylindrical tank 10 having a horizontally extending longitudinal axis.
  • a heating means is positioned in the lower part of the tank 10 and is shown to be constituted by hollow radiator plates forming heating elements, the plates extending vertically and being parallel to each other and to the longitudinal plane of symmetry of the tank.
  • steam distributing boxes are connected to the radiator plates at the respective ends of the tank to circulate heating steam therethrough.
  • a plurality of transverse walls la, 2a, 3a, 4a, 5a, 6a, separate tank 10 into a plurality of compartments 1, 2, 3, 4, 5, 6, 7, the spacing between the transverse walls increasing from the input end of the tank to the output end thereof.
  • each compartment is divided into four cells by by three walls 22 parallel to the longitudinal axis of the tank and transversely spaced from each other.
  • Cells A and D are laterally adjacent the walls of the tank and cells B & C are positioned centrally therebetween.
  • the neighboring cells in each compartment communicate with each other through port means in the wall 22 above or below the heating plates, the ports in the illustrated embodiment being shown below the heating plates.
  • one of the walls 22 is disposed in the longitudinal plane of symmetry of the tank while the two other walls 22 are disposed symmetrically in respect of this plane laterally adjacent the two lateral sections 14 and 16 of the heating means while the central heating means section 12 is divided by the intermediate wall 22.
  • a portion of dividing walls 22 is constituted by heating plates.
  • Each transverse wall defines a port 24 alternately placed to the right and to the left of the plane of symmetry adjacent the wall of tank 10, as clearly shown in FIG. 2, so that the like lateral cells A and D of neighboring compartments communicate with each other.
  • a concentrated solution of the solute to be crystallized is introduced into the first compartment 1 of tank 10, together with seed crystals.
  • a controlled amount of an under-saturated solution is introduced into each compartment to maintain the concentration of the solution in all compartments at a desired level, this amount being distributed in the cells of each compartment, all in a manner well known per se and not forming part of the present invention.
  • the solution and crystallized solute rise between the heating plates and descend again under the plates into' a vapor chamber above the heating means, where the vapor amasses, while passing through the passages between the heating plates and one of the cell walls.
  • the charge circulates from one cell to the next by passing through the ports in the longitudinal dividing walls 22 under the heating plates, as indicated by the three arrows in FIG. I.
  • the charge passes from compartment to compartment through the ports 24 in the transverse walls, as indicated by the curved arrows in FIG. 2. As shown by these arrows, the charge follows a sinuous path in its passage through the tank 10.
  • FIG. 3 differs from the abovedescribed apparatus in that the heating means is divided into two sections 30 and 32 disposed symmetrically in respect of the longitudinal plane of symmetry of the tank the longitudinal walls 22' being disposed identically to walls 22. In this way, each heating means section is subdivided into two sub-sections.
  • the central dividing wall 22 may be omitted, thus providing two lateral cells and one central cell in each compartment. Furthermore, more than three dividing walls could be used to produce a larger number of central cells.
  • the crystallization apparatus herein described is particularly useful for use in sugar refineries for producing sugar crystals.
  • a crystallization apparatus for crystallizing the solute of a solution by evaporating the solvent of the solution in a continous operation comprising 1. a substantially cylindrical tank having a horizontally extending longitudinal axis;
  • heating means positioned in the lower part of the tank
  • transverse walls separating the tank into a plurality of compartments and extending from the bottom of the tank to a level above the upper level of the heating means whereby the transverse walls define a vapor chamber in each of the compartments above the heating means
  • each of the transverse walls defining port means whereby the compartments are in communication;
  • each cell laterally adjacent the tank walls communicating with the like cell of the upstream or downstream compartment through respective ones of the port means defined in the transverse walls, and
  • the port means in the transverse walls being so arranged that the solution and crystallized solute circulate in a sinuous path through all of the cells from the inlet means to the outlet means of the tank, and
  • the heating means being divided into several sections each positioned in one of the cells and so spaced from at least one of the walls of the cells as to form in each cell a return passage for the solution and crystallized solute under the heating means whereby the solution and crystallized solute rise in each cell through the heating means, vapor from the heated solution amasses in a vapor chamber above the heating means, and the solution and crystallized solute descend through the return passage.
  • heating means is constituted by vertical radiators extending parallel to the longitudinal axis of the tank and passing through a plurality of the compartments, each of the heating means sections consisting of several of said radiators and being spaced laterally from one another.
  • heating means is divided into two of said sections, said sections being disposed symmetrically in respect of a longitudinal plane of symmetry of the tank, and each section is sub-divided into two sub-sections by a respective ones of the walls parallel to the longitudinal axis.
  • the heating means is divided into a central one of said sections, the central heating means section being disposed symmetrically in respect of a longitudinal plane of symmetry of the tank, and two lateral ones of said sections, the lateral heating means sections being disposed symmetrically in respect of the plane, and two of the walls parallel to the longitudinal axis are disposed between the central section and the lateral sections of the heating means.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Organic Chemistry (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
US00292858A 1971-09-29 1972-09-28 Crystallization apparatus Expired - Lifetime US3837811A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7134999A FR2154898A6 (enrdf_load_stackoverflow) 1971-09-29 1971-09-29

Publications (1)

Publication Number Publication Date
US3837811A true US3837811A (en) 1974-09-24

Family

ID=9083637

Family Applications (1)

Application Number Title Priority Date Filing Date
US00292858A Expired - Lifetime US3837811A (en) 1971-09-29 1972-09-28 Crystallization apparatus

Country Status (5)

Country Link
US (1) US3837811A (enrdf_load_stackoverflow)
JP (1) JPS4841978A (enrdf_load_stackoverflow)
FR (1) FR2154898A6 (enrdf_load_stackoverflow)
GB (1) GB1406460A (enrdf_load_stackoverflow)
ZA (1) ZA726421B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4583998A (en) * 1982-11-19 1986-04-22 Laurance S. Reid Separator system and process for gas conditioning solutions
US4978509A (en) * 1986-11-18 1990-12-18 The United States Of America As Represented By The United States Department Of Energy Lamella settler crystallizer

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS495730A (enrdf_load_stackoverflow) * 1972-04-25 1974-01-18
JPS52141331A (en) * 1976-05-18 1977-11-25 Tsunezou Nakazuru Green house
FR2548346A1 (fr) * 1983-06-20 1985-01-04 Fives Cail Babcock Echangeur de chaleur pour cristallisation continue

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU259917A1 (ru) * Кожухотрубчатый теплообменник
US1489932A (en) * 1920-09-07 1924-04-08 Gen Petroleum Corp Heat interchanger
US1700498A (en) * 1926-06-10 1929-01-29 Henry D Hughes Counterflow condenser
FR797552A (fr) * 1935-05-07 1936-04-29 évaporateur vertical à circulation accélérée pour la production du froid
US2467741A (en) * 1947-09-30 1949-04-19 Westinghouse Electric Corp Heat exchange apparatus
US2493969A (en) * 1946-01-12 1950-01-10 Floyd D James Heat exchanger
US2830798A (en) * 1953-02-13 1958-04-15 Garrett Corp Axial flow oil cooler having cross baffles
US3424221A (en) * 1966-06-06 1969-01-28 Gene W Luce Apparatus and method for continuous crystallization by evaporation
US3609986A (en) * 1968-01-17 1971-10-05 Blaw Knox Co Method and apparatus for freezing,utilizing a continuous flow through multiple chambers
US3687636A (en) * 1966-07-28 1972-08-29 Fives Lille Cail Wall cleaning in a crystallization vessel
US3725127A (en) * 1970-03-19 1973-04-03 Fives Lille Cail Method and system for controlling a crystallization installation

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU259917A1 (ru) * Кожухотрубчатый теплообменник
US1489932A (en) * 1920-09-07 1924-04-08 Gen Petroleum Corp Heat interchanger
US1700498A (en) * 1926-06-10 1929-01-29 Henry D Hughes Counterflow condenser
FR797552A (fr) * 1935-05-07 1936-04-29 évaporateur vertical à circulation accélérée pour la production du froid
US2493969A (en) * 1946-01-12 1950-01-10 Floyd D James Heat exchanger
US2467741A (en) * 1947-09-30 1949-04-19 Westinghouse Electric Corp Heat exchange apparatus
US2830798A (en) * 1953-02-13 1958-04-15 Garrett Corp Axial flow oil cooler having cross baffles
US3424221A (en) * 1966-06-06 1969-01-28 Gene W Luce Apparatus and method for continuous crystallization by evaporation
US3687636A (en) * 1966-07-28 1972-08-29 Fives Lille Cail Wall cleaning in a crystallization vessel
US3609986A (en) * 1968-01-17 1971-10-05 Blaw Knox Co Method and apparatus for freezing,utilizing a continuous flow through multiple chambers
US3725127A (en) * 1970-03-19 1973-04-03 Fives Lille Cail Method and system for controlling a crystallization installation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4583998A (en) * 1982-11-19 1986-04-22 Laurance S. Reid Separator system and process for gas conditioning solutions
US4978509A (en) * 1986-11-18 1990-12-18 The United States Of America As Represented By The United States Department Of Energy Lamella settler crystallizer

Also Published As

Publication number Publication date
GB1406460A (en) 1975-09-17
DE2247544A1 (de) 1973-04-12
FR2154898A6 (enrdf_load_stackoverflow) 1973-05-18
ZA726421B (en) 1973-06-27
DE2247544B2 (de) 1976-04-22
JPS4841978A (enrdf_load_stackoverflow) 1973-06-19

Similar Documents

Publication Publication Date Title
US3155565A (en) Flat film evaporation liquid concentration method
US3197387A (en) Multi-stage flash evaporators
US3627582A (en) Continuous crystallizing apparatus for sugar-bearing liquor
US3837811A (en) Crystallization apparatus
US3399708A (en) Parallel flow passage, plate type evaporators
US1028738A (en) Evaporating apparatus.
US3233981A (en) Apparatus for contacting dissimilar phases
US3228859A (en) Multistage flash evaporators
US3879215A (en) Compartmentalized vacuum pan for crystallization of sugar
US4667734A (en) Heat exchanger
JPH02500343A (ja) 蒸気／液体接触装置
GB1255512A (en) Moisture separating and steam reheating apparatus
US3242975A (en) Process and apparatus for effecting heat transfer
US3469615A (en) Recirculation plate type evaporators
JPH01266490A (ja) 気体／液体熱交換器
ES344611A1 (es) Perfeccionamientos en cajas de flujo para maquinas produc- toras de papel, carton o lamina fibrosa similar.
GB1334726A (en) Multi-stage flash evaporator
GB987124A (en) Multi-stage conical evaporator
US3424221A (en) Apparatus and method for continuous crystallization by evaporation
US1358050A (en) Heat-exchange apparatus
US4256536A (en) Evaporator
SU922467A1 (ru) Конвективный подогреватель
US3398059A (en) Multi-stage flash evaporator with means to induce hydraulic jump
US3195323A (en) Method and apparatus for vapor and liquid contact
DE2243670C3 (de) Verfahren und Wirbelbett-Trockner zum kontinuierlichen Trocknen von körnigen Stoffen