JPS5547122A - Prevention of clogging at heat exchanger for air preheater in dry exhaust smoke denitration apparatus - Google Patents
Prevention of clogging at heat exchanger for air preheater in dry exhaust smoke denitration apparatusInfo
- Publication number
- JPS5547122A JPS5547122A JP11914978A JP11914978A JPS5547122A JP S5547122 A JPS5547122 A JP S5547122A JP 11914978 A JP11914978 A JP 11914978A JP 11914978 A JP11914978 A JP 11914978A JP S5547122 A JPS5547122 A JP S5547122A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- heat exchanger
- gas
- adherent
- high temperature
- 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
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
PURPOSE: To remove adherent ammonium salt by supplying combustion exhaust gas to a catalytic reactor where nitrogen oxides in the gas are catalytically reduced with ammonia, and introducing high temperature exhaust gas from the outlet of the reactor directly into the lower temperature part of a heat exchanger for preheating air.
CONSTITUTION: Combustion exhaust gas from a boiler 1 is passed through a economizer 2. After the addition of NH3 gas to the exhaust gas, the exhaust gas is introduced directly into a catalytic reactor 4. The exhaust gas is discharged from the reactor 4 to a exhaust gas line 5. Under normal operation an exhaust valve 9 is opened and the exhaust gas is introduced into a heat exchanger 8. When with the lapse of time the heat exchanger 8 for preheating air is blocked by adherent ammonium salt, the exchanger is exposed to high temperature atmosphere every constant time basing on experimental data and pressure loss of the exchanger 8. Further, the lower temperature part is exposed partially to high temperature to decompose the adherent ammoinum salt, and the ammonium salt is diffused in a gas stream.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11914978A JPS5547122A (en) | 1978-09-29 | 1978-09-29 | Prevention of clogging at heat exchanger for air preheater in dry exhaust smoke denitration apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11914978A JPS5547122A (en) | 1978-09-29 | 1978-09-29 | Prevention of clogging at heat exchanger for air preheater in dry exhaust smoke denitration apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5547122A true JPS5547122A (en) | 1980-04-03 |
Family
ID=14754121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11914978A Pending JPS5547122A (en) | 1978-09-29 | 1978-09-29 | Prevention of clogging at heat exchanger for air preheater in dry exhaust smoke denitration apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5547122A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107029548A (en) * | 2015-07-14 | 2017-08-11 | 中国人民解放军63605部队 | A kind of skid-mounted device for uns-dimethylhydrazine waste gas harmless treatment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5033168A (en) * | 1973-07-27 | 1975-03-31 | ||
| JPS50145366A (en) * | 1974-05-15 | 1975-11-21 |
-
1978
- 1978-09-29 JP JP11914978A patent/JPS5547122A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5033168A (en) * | 1973-07-27 | 1975-03-31 | ||
| JPS50145366A (en) * | 1974-05-15 | 1975-11-21 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107029548A (en) * | 2015-07-14 | 2017-08-11 | 中国人民解放军63605部队 | A kind of skid-mounted device for uns-dimethylhydrazine waste gas harmless treatment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5314662A (en) | Method for decreasing nitrogen oxides concentration of combustion exhaust gas | |
| WO1998022209A1 (en) | SELECTIVE CATALYTIC NOx REDUCTION UTILIZING UREA WITHOUT CATALYST FOULING | |
| US5505919A (en) | Method for the denitration of exhaust gas | |
| EP0326388A3 (en) | Waste heat recovery having combined co and nox removal apparatus and method | |
| JPS51151259A (en) | A desulfurization and denitration process for exhaust gases of boiler apparatus | |
| EP0468205B1 (en) | Apparatus for treating exhaust gas | |
| JPH11300164A (en) | Boiler plant having denitration device, and denitration method | |
| JPS5448337A (en) | Waste-heat collecting boiler device | |
| JPS5499772A (en) | Packing layer for solid-gas contact reaction apparatus | |
| JPH0148809B2 (en) | ||
| JPS53144457A (en) | Method of and apparatus for denitration of exhaust gas | |
| JPS5499076A (en) | Removing method for nitrogen oxides contained in exhaust gas | |
| JPS52111463A (en) | Denitration of exhaust gas | |
| JPH01127028A (en) | Apparatus for denitridation of combustion exhaust gas | |
| JPS5362773A (en) | Decreasing apparatus for nitrogen oxides in exhaust gas from gas turbine | |
| JPS57130537A (en) | Removal of nitrogen oxide in exhaust gas | |
| JPS5332865A (en) | Dry denitrating method for exhaust combustion gas | |
| JPS5420955A (en) | Nox removing equipment | |
| JPS5547121A (en) | Starting of operation in exhaust smoke denitration apparatus | |
| JPS5596823A (en) | Denitrifying device for waste heat boiler | |
| JPS5230770A (en) | Process for treating nitrogen oxides in combustion gas | |
| JPS5352273A (en) | Removing method for nitrogen oxides in exhaust gas from combustion | |
| JPS51124667A (en) | A dry denitration method for high-temperature exhaust gas discharged f rom metal heating furnaces and annealing furnaces | |
| JPS5597231A (en) | Denitration | |
| JPS52105567A (en) | Denitration reactor of exhaust gas |