JPS5462970A - Scaling preventing method in wet lime gypsum method desulfurization apparatus or desulfurization and denitration apparatus - Google Patents
Scaling preventing method in wet lime gypsum method desulfurization apparatus or desulfurization and denitration apparatusInfo
- Publication number
- JPS5462970A JPS5462970A JP13011477A JP13011477A JPS5462970A JP S5462970 A JPS5462970 A JP S5462970A JP 13011477 A JP13011477 A JP 13011477A JP 13011477 A JP13011477 A JP 13011477A JP S5462970 A JPS5462970 A JP S5462970A
- Authority
- JP
- Japan
- Prior art keywords
- tower
- gypsum
- fed
- desulfurization
- filtrate
- 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
Abstract
PURPOSE: To prevent scaling in the title apparatus by circulating part of a gypsum free filtrate leaving a gypsum separating process to a cooling and dust removing process and maintaining the concn. of Cl- in the cooling and dust removing process to below a specific value.
CONSTITUTION: Exhaust gas 1 is fed to dust removing and cooling tower 2 to remove dust such as carbon and supplied to absorption tower 3 as stad. wet gas of 55W60°C. Lime slurry 4 is introduced into tower 3 to be reacted with SOx in the gas, forming CaSO3. This CaSO3-contg. absorbing liquid is fed to oxidation tower 5 to convert the CaSO3 into gypsum. The gypsum-contg. oxidized liquid is then fed to gypsum separator 6 to separate product gypsum 7. The filtrate is returned to lime preparation vessel 7, and at the same time part of the filtrate is circulated to tower 2. A chlorine-contg. inorg. salt such as NaCl is added to the filtrate circulated to tower 2, and above 1000, esp. 5000W8000 ppm of Cl- is introduced into the absorbing liquid fed to tower 2. Thus, scaling can be prevented esp. in the piping of tower 2.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13011477A JPS5462970A (en) | 1977-10-29 | 1977-10-29 | Scaling preventing method in wet lime gypsum method desulfurization apparatus or desulfurization and denitration apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13011477A JPS5462970A (en) | 1977-10-29 | 1977-10-29 | Scaling preventing method in wet lime gypsum method desulfurization apparatus or desulfurization and denitration apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5462970A true JPS5462970A (en) | 1979-05-21 |
Family
ID=15026278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13011477A Pending JPS5462970A (en) | 1977-10-29 | 1977-10-29 | Scaling preventing method in wet lime gypsum method desulfurization apparatus or desulfurization and denitration apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5462970A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6283025A (en) * | 1985-10-09 | 1987-04-16 | Babcock Hitachi Kk | Method of treating flue gas containing sulfur oxide |
JPS6397216A (en) * | 1986-10-13 | 1988-04-27 | Hitachi Zosen Corp | Wet treatment of exhaust gas |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS493874A (en) * | 1972-05-04 | 1974-01-14 | ||
JPS5015784A (en) * | 1973-05-10 | 1975-02-19 | ||
JPS5033994A (en) * | 1973-07-30 | 1975-04-02 | ||
JPS50136283A (en) * | 1974-04-18 | 1975-10-29 |
-
1977
- 1977-10-29 JP JP13011477A patent/JPS5462970A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS493874A (en) * | 1972-05-04 | 1974-01-14 | ||
JPS5015784A (en) * | 1973-05-10 | 1975-02-19 | ||
JPS5033994A (en) * | 1973-07-30 | 1975-04-02 | ||
JPS50136283A (en) * | 1974-04-18 | 1975-10-29 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6283025A (en) * | 1985-10-09 | 1987-04-16 | Babcock Hitachi Kk | Method of treating flue gas containing sulfur oxide |
JPS6397216A (en) * | 1986-10-13 | 1988-04-27 | Hitachi Zosen Corp | Wet treatment of exhaust gas |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5462970A (en) | Scaling preventing method in wet lime gypsum method desulfurization apparatus or desulfurization and denitration apparatus | |
US4038368A (en) | Process for removing oxides of nitrogen and sulfur from exhaust gases | |
JPS5357183A (en) | Treating method for exhaust gas containing fluorine-including component | |
JPS5390168A (en) | Simultaneously treating method for wet desulfurization and denitration of flue gas | |
JPS6254529B2 (en) | ||
JPS5597229A (en) | Desulfurization of exhaust gas | |
JPS5820888B2 (en) | Higasutyuuno Iousankabutuno Shiyorihohou | |
JPS5586522A (en) | Desulfurization of exhaust gas | |
JPS55116424A (en) | Wet-type apparatus for smoke evacuation and desulfurization | |
JPS5384872A (en) | Treating method for product of wet denitration process | |
JPS5314678A (en) | Simultaneous treating method for desulfurization and denitration of lue gas | |
JPS5440294A (en) | Purifying method for hydrogen chloride | |
JPS54110195A (en) | Gypsum recovering method in wet exhaust gas desulfurization apparatus | |
JPS5370080A (en) | Separating and removing method for h2s contained in gas mixture | |
JPS5318476A (en) | Simultaneous treating method for desulfurization and denitration of exhaust gas | |
JPS5358486A (en) | Simultaneous treating method for desulfurization and denitration of flue gas | |
JPS52128882A (en) | Method and apparatus of absorbent regeneration for wet process desulfurization and denitration | |
JPS544879A (en) | Method and apparatus for simultaneous treatment of wet process desulfurization and denitration | |
JPS52147573A (en) | Waste liquid treatment of wet type exhausted smoke desulfurization denitrification equipment | |
JPS54106070A (en) | Treating method for exhaust water from wet exhaust combustion gas desulfurizing apparatus using lime and gypsum | |
JPS52113364A (en) | Treatment of exhaust gas | |
JPS5216868A (en) | Treating desulfurization waste water | |
JPS542986A (en) | Regenerating method for sorbing agent for desulfurization and denitration | |
JPS5534169A (en) | Utilization method of water containing bivalent calcium | |
JPS55165130A (en) | Desulfurizing method for exhaust gas by wet type lime-gypsum process |