DENITRIFICATION CONTROL METHOD

PROBLEM TO BE SOLVED: To restrain a rapid increase in NOx concentration in waste gas released in the air and the quantity of leak ammonia by suitably performing denitrification. SOLUTION: A control part receives input of consumption Qo of heavy oil from a flowmeter (step 1), predicts the maximum and...

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Bibliographische Detailangaben
Hauptverfasser:	MORIYA TOMOHIKO, YAMAMOTO YASUSHI, MICHIHASHI HIDEJI, KANAMARU MASATOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSEGASES [GHG] GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To restrain a rapid increase in NOx concentration in waste gas released in the air and the quantity of leak ammonia by suitably performing denitrification. SOLUTION: A control part receives input of consumption Qo of heavy oil from a flowmeter (step 1), predicts the maximum and minimum values of concentration CN of NOx generated in waste gas based on the consumption Qo (step 2), calculates the quantity Eg of the waste gas at a stack inlet (step 3), calculates the injected quantity Qu of water solution of urea (step 4), and also calculates the maximum value Qmax and the minimum value Qmin of the injected quantity of the water solution of urea corresponding to the maximum and minimum values of the NOx concentration CN (step 5), and controls the injected quantity of the water solution of urea into the waste gas within the range from the maximum value Qmax to the minimum value Qmin .