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Title:
FLUIDIZED CALCINATION FURNACE
Document Type and Number:
WIPO Patent Application WO/2014/103302
Kind Code:
A1
Abstract:
Provided is a fluidized calcination furnace that reduces the uncombusted ratio at the fluidized calcination furnace outlet and thus can carry out sufficient calcination while preventing occlusion of a preheater even when pulverized coal, which has poor combustion properties, such as coal and coke, are used as fuel, by means of computational fluid dynamics calculations on the basis of actual furnace shape and operating conditions. The present invention is a fluidized calcination furnace (1) which has a cylindrical furnace body (2) with the axial center direction in the vertical direction, has a pulverized coal blow-in line (3) through which fuel is blown into the furnace body (2), a raw material chute (4) through which cement raw material is introduced, and at least one forced air introduction pipe (5) that sucks in air for forced air connected to the side parts of this furnace body (2), and has an air blow-in opening (6) for fluidization through which fluidization air is blown into the furnace body (2) disposed in the bottom of the furnace body (2). The blow-in opening for the pulverized coal blow-in line (3) is below the inlet opening for the forced air introduction pipe (5), and is disposed above the air blow-in opening (6) for fluidization.

Inventors:
TAKAYAMA, Yoshinori (Central Research Institute 1002-14, Mukohyama, Naka-sh, Ibaraki 02, 〒3110102, JP)
WANG, Junzhu (Central Research Institute 1002-14, Mukohyama, Naka-sh, Ibaraki 02, 〒3110102, JP)
Application Number:
JP2013/007585
Publication Date:
July 03, 2014
Filing Date:
December 25, 2013
Export Citation:
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Assignee:
MITSUBISHI MATERIALS CORPORATION (3-2 Otemachi 1-chome, Chiyoda-ku Tokyo, 17, 〒1008117, JP)
International Classes:
C04B7/45; F27B15/14
Foreign References:
JPH08231254A1996-09-10
JPS60112651A1985-06-19
JP2004124133A2004-04-22
JP2011105536A2011-06-02
JPH08231254A1996-09-10
Other References:
See also references of EP 2939989A4
Attorney, Agent or Firm:
SHIMIZU, Chiharu (3rd Floor, Nakagin-Honsha Bldg. 16-10, Ginza 8-chome, Chuo-k, Tokyo 61, 〒1040061, JP)
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