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GB1102790A - Production of quicklime in a fluidised bed - Google Patents

Production of quicklime in a fluidised bed

Info

Publication number
GB1102790A
GB1102790A GB5486765A GB5486765A GB1102790A GB 1102790 A GB1102790 A GB 1102790A GB 5486765 A GB5486765 A GB 5486765A GB 5486765 A GB5486765 A GB 5486765A GB 1102790 A GB1102790 A GB 1102790A
Authority
GB
United Kingdom
Prior art keywords
bed
coal
mixture
solids
shells
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
GB5486765A
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.)
Unisearch Ltd
Original Assignee
Unisearch Ltd
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 AU53530/64A external-priority patent/AU404445B2/en
Application filed by Unisearch Ltd filed Critical Unisearch Ltd
Publication of GB1102790A publication Critical patent/GB1102790A/en
Expired 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2/00—Lime, magnesia or dolomite
    • C04B2/10—Preheating, burning calcining or cooling
    • C04B2/106—Preheating, burning calcining or cooling in fluidised bed furnaces
    • 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
    • B01J2208/00504—Controlling the temperature by means of a burner

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

CaO is produced in fluidized bed by feeding a mixture of calcareous material and solid fuel from above into a fluidized bed reactor preheated to 850 DEG C., supplying excess air to fluidize the bed, and withdrawing product from the surface of the bed. The calcerous material may be limestone or ground sea shells, the fuel (having a M. pt. above 1400 DEG C.) may be charcoal, coke or coal, e.g. filter cake coal, and the decomposition temperature may be 950-1050 DEG C. In the Figure, coal and shells (e.g. 28 Tyler mesh) are fed from hoppers 24 and 25 resp. via E.M. vibrators, through water-cooled tube 11, and the bed is initially heated to 850 DEG C. by coal gas flame (burner 21) which is extinguished when the bed level reaches thermocouple 28. Temperature is controlled automatically (33) by the feed of coal and by water cooler 37. Exhaust gases pass through cyclone 22 (whence solids return to the bed) <FORM:1102790/C1/1> and are used to heat incoming air in 14. Baffle 33 controls the residence time of the solids. A mixture of lime and ash is withdrawn through pipe 12.
GB5486765A 1964-12-31 1965-12-24 Production of quicklime in a fluidised bed Expired GB1102790A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU53530/64A AU404445B2 (en) 1964-12-31 Production of quicklime in a fluidised bed

Publications (1)

Publication Number Publication Date
GB1102790A true GB1102790A (en) 1968-02-07

Family

ID=3739546

Family Applications (2)

Application Number Title Priority Date Filing Date
GB5486665A Expired GB1132720A (en) 1964-12-31 1965-12-24 Apparatus for burning liquid or gaseous fuels in a fluidised bed
GB5486765A Expired GB1102790A (en) 1964-12-31 1965-12-24 Production of quicklime in a fluidised bed

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB5486665A Expired GB1132720A (en) 1964-12-31 1965-12-24 Apparatus for burning liquid or gaseous fuels in a fluidised bed

Country Status (1)

Country Link
GB (2) GB1132720A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3991172A (en) 1970-05-20 1976-11-09 Rheinische Kalksteinwerke Gmbh Process for the production of reactive calcium oxide

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025101474A1 (en) * 2023-11-10 2025-05-15 United States Gypsum Company Gypsum calcining apparatuses and methods

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3991172A (en) 1970-05-20 1976-11-09 Rheinische Kalksteinwerke Gmbh Process for the production of reactive calcium oxide

Also Published As

Publication number Publication date
GB1132720A (en) 1968-11-06

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