Title:
COMBUSTION CONTROL DEVICE FOR TRASH INCINERATOR AND ITS METHOD
Document Type and Number:
Japanese Patent JP3425707
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To stabilize the temperature in a furnace, and suppress the variation range of O2 concentration in the furnace by a method wherein the temperature in the furnace, the O2 concentration in the combustion exhaust gas, and the CO concentration, the NOx concentration of a trash incineration furnace are measured, and the amount of secondary combustion air is controlled by a non-linear type control means based on the measured values.
SOLUTION: The amount of primary combustion air is controlled and operated by a primary combustion air amount control unit Al by a steam amount deviation between a steam amount target value and a steam amount which is obtained from a combustion process A2 of a trash incineration furnace, and by the output, a primary combustion air jetting amount is controlled to control the steam amount. Also, at a secondary combustion air control unit A3, a furnace internal temperature deviation value between a temperature in the furnace from the combustion process A2 of the trash incineration furnace and a furnace internal temperature target value, is obtained, and a comparison between a furnace exhaust O2 concentration and a set value regarding the furnace exhaust O2 value, a comparison between a furnace exhaust NOx concentration and a set value regarding the furnace exhaust NOx concentration, and a comparison between a CO concentration value and a set value regarding the CO concentration, are performed. Depending on the results, at the secondary combustion air control unit A3, an increase/decrease control is performed non-linearly for each condition, e.g. when the furnace internal temperature deviation is negative, and the secondary combustion air amount is in a cooling area, the secondary combustion air amount is reduced by a fixed quantity, etc.
Inventors:
Satoshi Fujii
Yuichi Nogami
Yuichi Nogami
Application Number:
JP13929296A
Publication Date:
July 14, 2003
Filing Date:
May 31, 1996
Export Citation:
Assignee:
JFE Engineering Corporation
International Classes:
F23G5/50; F23G5/14; F23G5/46; (IPC1-7): F23G5/50
Domestic Patent References:
| JP6332501A | ||||
| JP631299A | ||||
| JP5196220A | ||||
| JP62169920A |
Attorney, Agent or Firm:
Hideo Takino (1 outside)
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