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A method and apparatus for processing a pulverulent or particulate material

A granular, equipment technology that can solve problems such as insufficiency in lighting and heating equipment, heating to dry solid materials, chemical instruments and methods, etc.

Inactive Publication Date: 2003-06-11
NIRO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the above measures may not be sufficient when the fluidization process involves materials that release corrosive vapors on drying, such as s-PVC that releases HCl

Method used

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  • A method and apparatus for processing a pulverulent or particulate material
  • A method and apparatus for processing a pulverulent or particulate material
  • A method and apparatus for processing a pulverulent or particulate material

Examples

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Embodiment Construction

[0014] figure 1 and 2 A cut-away view of a first section 1 and a second section 5 of a fluidized bed apparatus for processing powdery or granular materials is shown respectively. Examples of such materials are milk products, ceramics, polymers, etc., which are dried, cooled or spray-granulated, for example in fluidized bed equipment. The method and device according to the invention are particularly advantageous for chlorine-containing materials, such as inorganic salts or polymers such as PVC.

[0015] The first section 1 of the apparatus is in the illustrated embodiment of the back-mixing type, in which powdered or granular material is supplied by distributor means (not shown) to a fluidized bed plate 2 on which the material forms a layer Material P. The height or thickness of the material depends on the type of material to be processed and can be adjusted with a suitable device such as a damper or overflow valve. The fluidizing gas is introduced from the plenum 4 through...

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Abstract

In a fluid bed apparatus in which a layer of pulverulent or particulate material is fluidized by means of fluidizing gas which is introduced through openings in a bed plate in a first plurality of streams of flows of gas, means are provided for introducing a second plurality of streams of flows of gas at a site or sites of introduction and is directed from said site or sites along the surfaces of at least some of the walls of the housing to form a gas barrier covering at least a substantial part of said wall surfaces and the ceiling of the housing thus reducing detrimental effects, in particular deposition of products, condensation and corrosion, on the surfaces of the walls and ceiling of the housing.

Description

technical field [0001] The invention relates to a method and an apparatus for processing a layer of powdery or granular material which is fluidized on the deck of a fluidized bed apparatus by means of a fluidizing gas which passes through the individual beds of the deck The openings are introduced into a first plurality of gas streams or gas streams, the fluidized bed apparatus includes a housing, the housing is generally polygonal in shape, including a number of walls and a top, the method also includes reducing harmful effects, in particular Deposition, condensation and corrosion of products on the wall and roof surfaces. Background technique [0002] A well-known problem in the field of fluidized bed technology is the condensation on the shell walls and roof due to the high moisture content of the fluidizing gas after passing through the bed of material to be processed in the fluidized bed, There is also the problem that product may be deposited on these walls. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/18B01J8/24B01J19/00F26B3/08F26B17/10
CPCB01J2219/00252B01J19/002F26B3/08B01J8/245B01J2219/00123B01J8/1872F26B3/082
Inventor J·T·莫尔勒U·克里斯琴森
Owner NIRO
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