Title:
COMBUSTION CONTROL METHOD IN FLUIDIZED BED TYPE FURNACE
Document Type and Number:
Japanese Patent JP2748214
Kind Code:
B2
Abstract:
PURPOSE: To enable a processed material having a high range of generating heat to be completely ignited within a fluidized bed type furnace by a method wherein an amount of circulating discharged gas is controlled in response to a temperature of a fluidized bed and a temperature within the fluidized bed is kept within a specified temperature range.
CONSTITUTION: In a device having a fluidized bed 1, a part of discharged gas cooled and of which dust is removed is extracted through a discharged gas circulation line 20 and circulated to an air box 2 of the fluidized bed type furnace 1 together with primary air. Then, an amount of circulating discharged gas is controlled by a temperature indicating control 21. connected to a fluidized bed 3 through a flow rate control means 22 such as a damper, a valve and an inverter and the like. That is, as a temperature of the fluidized bed 1 is higher than the set value, the flow rate control means 22 is operated in such a direction as one in which the means 22 is opened, resulting in that an amount of discharged gas circulation is increased, a partial pressure of O2 is decreased to cause a temperature of the fluidized bed 1 to be lowered and in turn when a temperature of the fluidized bed 1 is lower than the set value, the flow rate control means 22 is operated in a closing direction, the amount of circulating discharged gas is reduced, the partial pressure of O2 is increased so as to increase the temperature of the fluidized bed 1. Accordingly, a stable combustion of low CO becomes possible.
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Inventors:
YOKOYAMA SHOICHIRO
FUJAMA HIROSHI
TSUNAI MASAHIRO
SHIMOKAWA TATSUYUKI
FUJAMA HIROSHI
TSUNAI MASAHIRO
SHIMOKAWA TATSUYUKI
Application Number:
JP13300593A
Publication Date:
May 06, 1998
Filing Date:
May 11, 1993
Export Citation:
Assignee:
KAWASAKI JUKOGYO KK
International Classes:
F23C99/00; F23C10/00; F23G5/50; (IPC1-7): F23C11/02; F23C11/00; F23C11/02; F23G5/50
Domestic Patent References:
| JP5649805A | ||||
| JP59195019A | ||||
| JP6341708A | ||||
| JP4273911A | ||||
| JP4283304A |
Attorney, Agent or Firm:
Shinichi Shiode
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