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Patent Searching and Data


Title:
METHOD OF OPERATING WASTE INCINERATION PLANT
Document Type and Number:
Japanese Patent JP2011237137
Kind Code:
A
Abstract:

To maximize a heat recovery amount without generating low-temperature corrosion in a heat exchanger, even when properties of an exhaust gas rapidly or slowly changes due to change of wastes and the like.

In this method of operating a waste incineration plant including a waste incinerator 1, a boiler 2 and an economizer 3 for recovering heat of the exhaust gas G discharged from the incinerator 1, and an exhaust gas processing system for removing soot and dust, an acidic gas and nitrogen oxide in the exhaust gas G passing through the economizer 3, an acid dew-point and SO2 concentration in the exhaust gas G at an inlet side of the economizer 3 are continuously measured, urea or ammonia is sprayed into the exhaust gas G in the incinerator 1 and at the inlet side of the economizer 3 on the basis of a result of the measurement of the acid dew point to remove SO3 so that the acid dew point temperature in the exhaust gas G is lowered, and a temperature of supply water W supplied to the economizer 3 and a boiler 2 is controlled on the basis of a result of the measurement of SO2 concentration to keep a surface temperature of a heat transfer tube of the economizer 3 at the acid dew point temperature or more.


Inventors:
SAMEJIMA RYOJI
MATSUMOTO AKIHIRO
Application Number:
JP2010000110024
Publication Date:
November 24, 2011
Filing Date:
May 12, 2010
Export Citation:
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Assignee:
TAKUMA KK
International Classes:
F23G5/50; B01D53/50; B01D53/56; B01D53/77; F22B1/18; F23G5/48; F23J15/00; B01D53/94
Domestic Patent References:
JPH10132207A1998-05-22
JP2002206701A2002-07-26
JPH112403A1999-01-06
JP2004184044A2004-07-02
Attorney, Agent or Firm:
杉本 丈夫
谷田 龍一