FR2644565B2 - IMPROVEMENTS TO A PROCESS AND TO A DEVICE FOR DEHYDRATION OF A POWDER MINERAL, ESPECIALLY FOR THE MANUFACTURE OF PLASTER - Google Patents

IMPROVEMENTS TO A PROCESS AND TO A DEVICE FOR DEHYDRATION OF A POWDER MINERAL, ESPECIALLY FOR THE MANUFACTURE OF PLASTER

Info

Publication number
FR2644565B2
FR2644565B2 FR8903458A FR8903458A FR2644565B2 FR 2644565 B2 FR2644565 B2 FR 2644565B2 FR 8903458 A FR8903458 A FR 8903458A FR 8903458 A FR8903458 A FR 8903458A FR 2644565 B2 FR2644565 B2 FR 2644565B2
Authority
FR
France
Prior art keywords
plaster
dehydration
manufacture
powder mineral
mineral
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
FR8903458A
Other languages
French (fr)
Other versions
FR2644565A2 (en
Inventor
Francois Baudequin
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.)
Electricite de France SA
Original Assignee
Electricite de France 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
Priority claimed from FR8710303A external-priority patent/FR2618539B1/en
Application filed by Electricite de France SA filed Critical Electricite de France SA
Priority to FR8903458A priority Critical patent/FR2644565B2/en
Publication of FR2644565A2 publication Critical patent/FR2644565A2/en
Application granted granted Critical
Publication of FR2644565B2 publication Critical patent/FR2644565B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/1836—Heating and cooling the reactor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/08—Humidity
    • F26B21/086—Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
    • F26B3/084—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed with heat exchange taking place in the fluidised bed, e.g. combined direct and indirect heat exchange
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00026—Controlling or regulating the heat exchange system
    • B01J2208/00035—Controlling or regulating the heat exchange system involving measured parameters
    • B01J2208/00044—Temperature measurement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00106—Controlling the temperature by indirect heat exchange
    • B01J2208/00115—Controlling the temperature by indirect heat exchange with heat exchange elements inside the bed of solid particles
    • B01J2208/00132—Tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00106—Controlling the temperature by indirect heat exchange
    • B01J2208/00115—Controlling the temperature by indirect heat exchange with heat exchange elements inside the bed of solid particles
    • B01J2208/00141—Coils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00389—Controlling the temperature using electric heating or cooling elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Combustion & Propulsion (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Drying Of Solid Materials (AREA)
FR8903458A 1987-07-21 1989-03-16 IMPROVEMENTS TO A PROCESS AND TO A DEVICE FOR DEHYDRATION OF A POWDER MINERAL, ESPECIALLY FOR THE MANUFACTURE OF PLASTER Expired - Lifetime FR2644565B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8903458A FR2644565B2 (en) 1987-07-21 1989-03-16 IMPROVEMENTS TO A PROCESS AND TO A DEVICE FOR DEHYDRATION OF A POWDER MINERAL, ESPECIALLY FOR THE MANUFACTURE OF PLASTER

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8710303A FR2618539B1 (en) 1987-07-21 1987-07-21 ELECTRIC HEATER DEHYDRATION PROCESS AND DEVICE
FR8903458A FR2644565B2 (en) 1987-07-21 1989-03-16 IMPROVEMENTS TO A PROCESS AND TO A DEVICE FOR DEHYDRATION OF A POWDER MINERAL, ESPECIALLY FOR THE MANUFACTURE OF PLASTER

Publications (2)

Publication Number Publication Date
FR2644565A2 FR2644565A2 (en) 1990-09-21
FR2644565B2 true FR2644565B2 (en) 1991-09-13

Family

ID=26226123

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8903458A Expired - Lifetime FR2644565B2 (en) 1987-07-21 1989-03-16 IMPROVEMENTS TO A PROCESS AND TO A DEVICE FOR DEHYDRATION OF A POWDER MINERAL, ESPECIALLY FOR THE MANUFACTURE OF PLASTER

Country Status (1)

Country Link
FR (1) FR2644565B2 (en)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE462779C (en) * 1924-02-03 1928-07-17 Telex Appbau Ges M B H Method and device for the recovery of the drying of brown coal u. Like waste heat lost in steam
GB648388A (en) * 1946-03-04 1951-01-03 Georges Ilune Improvements in drying methods and apparatus
US2629938A (en) * 1949-03-03 1953-03-03 Kaiser Aluminium Chem Corp Method and apparatus for treating solids
DE2734198A1 (en) * 1977-07-29 1979-02-08 Babcock Bsh Ag Low energy hot gas double treatment dryer - has closed circuit plus branch with cooler and condenser
IT1108191B (en) * 1978-12-12 1985-12-02 Fasano Pietro AIR-FLOW DRIER WITH VARIABLE TEMPERATURE AND ITS RECOVERY FOR CEREALS ESPECIALLY
US4236318A (en) * 1979-03-13 1980-12-02 Salem Corporation Methods and apparatus for heating particulate material
US4247991A (en) * 1979-10-01 1981-02-03 Intertechnology/Solar Corporation Industrial drying
US4324544A (en) * 1980-06-12 1982-04-13 Fmc Corporation Process and system for drying coal in a fluidized bed by partial combustion
GB8507109D0 (en) * 1985-03-19 1985-04-24 Burdett S Quarry heat recovery
FR2618539B1 (en) * 1987-07-21 1989-09-22 Electricite De France ELECTRIC HEATER DEHYDRATION PROCESS AND DEVICE

Also Published As

Publication number Publication date
FR2644565A2 (en) 1990-09-21

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