JPS5513114A - Removal of nitrogen oxide - Google Patents
Removal of nitrogen oxideInfo
- Publication number
- JPS5513114A JPS5513114A JP8513078A JP8513078A JPS5513114A JP S5513114 A JPS5513114 A JP S5513114A JP 8513078 A JP8513078 A JP 8513078A JP 8513078 A JP8513078 A JP 8513078A JP S5513114 A JPS5513114 A JP S5513114A
- Authority
- JP
- Japan
- Prior art keywords
- denitrification
- acid
- ethylenediamine
- iron
- ion
- 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 keep long-term denitrification at lower running cost by controlling the molal concentration of ethylenediamine teraacetic acid and the concentration of denatured ethylenediamine tetraacetic acid on the basis of iron.
CONSTITUTION: NOx-containing waste gas is brought into contact with a solution containing a complex consisting of iron ion, polyaminocarboxylic acid, and its salt, sulfurous acid ion, and acid sulfurous acid ion for denitrification. In this case, the denitrification is made by regulating the molal concentration of ethylenediamine tetraacetic acid within a range of 0.9 to 1 on the basis of iron and letting the denatured ethylenediamine substance, e.g., ethylenediamine triacetic acid, etc., coexist in an amount of less than 0.05 moles in denitrification liquid, whereby denitrification can be performed without lowering the rate of denaturation. Thus, it is possible to reduce the running cost of denitrification plant without lowering the efficiency of denitrification and yield of gypsum even if the amount of ethylenediamine tetraacetic acid to supply is reduced.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8513078A JPS5513114A (en) | 1978-07-14 | 1978-07-14 | Removal of nitrogen oxide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8513078A JPS5513114A (en) | 1978-07-14 | 1978-07-14 | Removal of nitrogen oxide |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5513114A true JPS5513114A (en) | 1980-01-30 |
Family
ID=13850061
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8513078A Pending JPS5513114A (en) | 1978-07-14 | 1978-07-14 | Removal of nitrogen oxide |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5513114A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4983464U (en) * | 1972-10-23 | 1974-07-19 |
-
1978
- 1978-07-14 JP JP8513078A patent/JPS5513114A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4983464U (en) * | 1972-10-23 | 1974-07-19 |
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