JPS57207532A - Controller for injection of ammonia in stack gas denitrating device - Google Patents
Controller for injection of ammonia in stack gas denitrating deviceInfo
- Publication number
- JPS57207532A JPS57207532A JP56090558A JP9055881A JPS57207532A JP S57207532 A JPS57207532 A JP S57207532A JP 56090558 A JP56090558 A JP 56090558A JP 9055881 A JP9055881 A JP 9055881A JP S57207532 A JPS57207532 A JP S57207532A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- injection
- rate
- inputted
- multiplier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Treating Waste Gases (AREA)
Abstract
PURPOSE: To make injection of NH3 without excess or shortage possible by the use of the accurate formed NOx value obtained by correcting the set value of the concn. of the formed NOx from a function generator obtained by the signal indicating the rate of combustion of a combustion device by the measured value with an NOx analyzer.
CONSTITUTION: The signal 1-1 indicating the rate of combustion such as flow rate of combustion air is inputted to a function generator 3, and the resultant concn. signal 3-2 for formed NOx and the NH3/NOx molar ratio signal 2-1 from a function generator 2 are inputted to a multiplier 5. The NH3 molar signal 5-1 obtained here and the signal 1-1 are inputted to a multiplier 4, by which the rate of injection of NH3 is calculated. At this time, the concn. signal 9-1 for the formed NOx and the correction signal 6-1 for the signal 3-1 are compared in an arithmetic device 7, and the integrated signal 8-1 for a deviation signal 7-1 is inputted to an operator 6, so that the signal 3-1 is corrected. Finally, the calculated value of the rate of injection of NH3 of the multiplier 4 obtained by using the signal 6-1 which is made euqal to the signal 9-1 is inputted via a multiplier 10 to a controller 11 for the rate of injection of NH3, which controls the opening of a control valve 13 for the flow rate of NH3.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56090558A JPS57207532A (en) | 1981-06-12 | 1981-06-12 | Controller for injection of ammonia in stack gas denitrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56090558A JPS57207532A (en) | 1981-06-12 | 1981-06-12 | Controller for injection of ammonia in stack gas denitrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57207532A true JPS57207532A (en) | 1982-12-20 |
Family
ID=14001736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56090558A Pending JPS57207532A (en) | 1981-06-12 | 1981-06-12 | Controller for injection of ammonia in stack gas denitrating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57207532A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61257222A (en) * | 1985-05-10 | 1986-11-14 | Ishikawajima Harima Heavy Ind Co Ltd | Controller for amount of ammonia to be fed in denitration apparatus |
| JP2020192501A (en) * | 2019-05-28 | 2020-12-03 | 株式会社東芝 | Denitration control device and denitration control method |
-
1981
- 1981-06-12 JP JP56090558A patent/JPS57207532A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61257222A (en) * | 1985-05-10 | 1986-11-14 | Ishikawajima Harima Heavy Ind Co Ltd | Controller for amount of ammonia to be fed in denitration apparatus |
| JP2020192501A (en) * | 2019-05-28 | 2020-12-03 | 株式会社東芝 | Denitration control device and denitration control method |
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