FR2337862A1 - Continuous drying of granular material - using a fluidised bed with zones of decreasing slope each independently supplied with drying air - Google Patents

Continuous drying of granular material - using a fluidised bed with zones of decreasing slope each independently supplied with drying air

Info

Publication number
FR2337862A1
FR2337862A1 FR7600311A FR7600311A FR2337862A1 FR 2337862 A1 FR2337862 A1 FR 2337862A1 FR 7600311 A FR7600311 A FR 7600311A FR 7600311 A FR7600311 A FR 7600311A FR 2337862 A1 FR2337862 A1 FR 2337862A1
Authority
FR
France
Prior art keywords
zone
drying
zones
flow
drying air
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.)
Granted
Application number
FR7600311A
Other languages
French (fr)
Other versions
FR2337862B1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7600311A priority Critical patent/FR2337862A1/en
Publication of FR2337862A1 publication Critical patent/FR2337862A1/en
Application granted granted Critical
Publication of FR2337862B1 publication Critical patent/FR2337862B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • F26B3/082—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 arrangements of devices for distributing fluidising gas, e.g. grids, nozzles

Abstract

The drying takes place in several successive zones, each zone after the first has its bed support palte through which the drying air passes at a shallower angle than the preceding one. The first zone may be at 40 degrees to the horizontal and the fourth zone at 20 degrees, with the slope of intermediate zones reducing gradually. Each zone is also supplied with its own supply of heated drying air independently controlled. For drying at high temps., above 250 degrees C, an alternative design of equipment is preferred which uses steps in each zone instead of sloping plates. The steps in successive zones are shallower and independently controlled heating air is still supplied to each zone. The different zones allow for control of the flow and depth of material. It is also possible to vary the fluidisation air flow and press, to each zone. The result is bed depths not exceeding 10 cm. compared with 20-80 cm using other fluid bed driers. The separate control of drying air-press. and flow for each zone helps to control the flow of dry material as a function of its moisture content.
FR7600311A 1976-01-08 1976-01-08 Continuous drying of granular material - using a fluidised bed with zones of decreasing slope each independently supplied with drying air Granted FR2337862A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7600311A FR2337862A1 (en) 1976-01-08 1976-01-08 Continuous drying of granular material - using a fluidised bed with zones of decreasing slope each independently supplied with drying air

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7600311A FR2337862A1 (en) 1976-01-08 1976-01-08 Continuous drying of granular material - using a fluidised bed with zones of decreasing slope each independently supplied with drying air

Publications (2)

Publication Number Publication Date
FR2337862A1 true FR2337862A1 (en) 1977-08-05
FR2337862B1 FR2337862B1 (en) 1979-08-31

Family

ID=9167702

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7600311A Granted FR2337862A1 (en) 1976-01-08 1976-01-08 Continuous drying of granular material - using a fluidised bed with zones of decreasing slope each independently supplied with drying air

Country Status (1)

Country Link
FR (1) FR2337862A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2508152A1 (en) * 1981-06-19 1982-12-24 Gauzes Michel Hot air drier for sand - has enclosure with base bed of porous material with buried pipes carrying hot air
EP0514323A1 (en) * 1991-05-17 1992-11-19 HILTI Aktiengesellschaft Transporting device for small objects
EP0940644A1 (en) * 1998-03-04 1999-09-08 GARBUIO S.p.A. Fluid-bed drying unit, particularly for drying tobacco

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2508152A1 (en) * 1981-06-19 1982-12-24 Gauzes Michel Hot air drier for sand - has enclosure with base bed of porous material with buried pipes carrying hot air
EP0514323A1 (en) * 1991-05-17 1992-11-19 HILTI Aktiengesellschaft Transporting device for small objects
EP0940644A1 (en) * 1998-03-04 1999-09-08 GARBUIO S.p.A. Fluid-bed drying unit, particularly for drying tobacco
US6148541A (en) * 1998-03-04 2000-11-21 Garbuio S.P.A. Fluid-bed drying unit, particularly for drying tobacco

Also Published As

Publication number Publication date
FR2337862B1 (en) 1979-08-31

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Legal Events

Date Code Title Description
ST Notification of lapse