IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0541153
(2004-01-29)
|
등록번호 |
US-7651329
(2010-02-24)
|
우선권정보 |
JP-2003-024214(2003-01-31) |
국제출원번호 |
PCT/JP2004/000872
(2004-01-29)
|
§371/§102 date |
20050630
(20050630)
|
국제공개번호 |
WO04/068034
(2004-08-12)
|
발명자
/ 주소 |
- Okura, Hajime
- Katsube, Toshio
- Saito, Takayuki
|
출원인 / 주소 |
- Babcock-Hitachi Kabushiki Kaisha
|
대리인 / 주소 |
Greenblum & Bernstein, P.L.C.
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
22 |
초록
▼
In an exhaust gas processing device wherein in order to efficiently outwardly discharge heat at high temperatures of about 90-150° C. released from a GGH reheater during the shutdown of a desulfurizer, to prevent damage to equipment and corrosion preventive lining material, and to ensure long-t
In an exhaust gas processing device wherein in order to efficiently outwardly discharge heat at high temperatures of about 90-150° C. released from a GGH reheater during the shutdown of a desulfurizer, to prevent damage to equipment and corrosion preventive lining material, and to ensure long-term stabilized use of the exhaust gas processing device, at least a GGH heat recovery unit, an absorption tower, a mist eliminator (M/E), and the GGH reheater are placed in a duct for exhaust gases discharged from a fire furnace, in the order named as seen from the upstream side of a flow of exhaust gases, an exhaust gas duct between the M/E and the reheater is provided with a heat radiation device or the like having a heat suppression function for suppressing dissipated heat from the reheater.
대표청구항
▼
What is claimed is: 1. An exhaust gas processing device comprising, in order from the upstream side of an exhaust gas flow direction, at least a nonleak-type gas-gas heater heat recovery unit, an absorption tower, a mist eliminator, and a nonleak-type gas-gas heater reheater for circulating a heat
What is claimed is: 1. An exhaust gas processing device comprising, in order from the upstream side of an exhaust gas flow direction, at least a nonleak-type gas-gas heater heat recovery unit, an absorption tower, a mist eliminator, and a nonleak-type gas-gas heater reheater for circulating a heat medium with respect to the nonleak-type gas-gas heater heat recovery unit arranged in a duct for exhaust gas discharged from a fire furnace, wherein a heat suppression device for suppressing dissipated heat from the nonleak-type gas-gas heater reheater is arranged in an exhaust gas duct between the mist eliminator and nonleak-type gas-gas heater reheater, the heat suppression device comprising a configuration wherein the exhaust gas duct between the mist eliminator and the nonleak-type gas-gas heater reheater is provided with a blow-off device configured to discharge heated gas from the inside of the exhaust gas duct to the outside of the exhaust gas duct. 2. The exhaust gas processing device as set forth in claim 1, wherein a steam-gas heater is provided in the exhaust gas duct between the mist eliminator and the nonleak-type gas-gas heater reheater, and a heat suppression device for suppressing dissipated heat from the steam-gas heater is provided in the exhaust gas duet between the mist eliminator and the steam-gas heater. 3. The exhaust gas processing device as set forth in claim 2, wherein the heat suppression device further comprises at least one of the following: a configuration having a thermometer to measure ambient air temperature of the inside of the exhaust gas duct provided in the exhaust gas duct between the mist eliminator and the nonleak-type gas-gas heater reheater, and a spray nozzle pipeline with an opening/closing valve to wash at least one of an element of the mist eliminator and an exhaust gas duct inner wall surface, and the periphery thereof with a washing liquid, the opening/closing valve of the spray nozzle pipeline being activated when the thermometer reads a temperature greater than or equal to a set temperature, the spray nozzle pipeline being provided at at least one of a front surface and a rear surface of the mist eliminator, the front surface of the mist eliminator being contacted by exhaust gas before the rear surface of the mist eliminator is contacted by the exhaust gas; and a configuration wherein at least one of a heat-resistant resin material and a corrosion preventive lining material resistant to dissipated heat from the nonleak-type gas-gas heater reheater during a shutdown of the absorption tower is provided on at least one of an element of the mist eliminator, an absorption tower outlet duct, an exhaust gas duct between the absorption tower and mist eliminator, and an exhaust gas duct between the mist eliminator and the nonleak-type gas-gas heater reheater. 4. The exhaust gas processing device as set forth in claim 1, wherein the absorption tower is a two-chamber-type absorption tower provided with (a) a circulation tank for retaining of an absorption liquid, and (b) spray nozzles in respective regions, while an inlet duct for introducing exhaust gas discharged from a combustion device such as a boiler in a generally horizontal direction and an outlet duct for discharging exhaust gas in a generally horizontal direction are provided above the circulation tank, an exhaust gas channel is provided between the inlet duct and outlet duct, a partition plate extending in a vertical direction having an opening portion at a ceiling portion side to divide the exhaust gas channel into two chambers of an inlet duet side and an outlet duct side is provided, and an ascending current region where exhaust gas introduced from the inlet duct flows upward and a descending current region where exhaust gas flows downward toward the outlet duet after reversing at the opening portion of the ceiling side are formed by the partition plate, so that an ejecting absorption liquid slurry makes countercurrent contact with exhaust gas in the ascending current region and makes parallel-current contact in the descending current region. 5. The exhaust gas processing device as set forth in claim 1, wherein the heat suppression device further comprises at least one of the following: a configuration having a thermometer to measure ambient air temperature of the inside of the exhaust gas duct provided in the exhaust gas duct between the mist eliminator and the nonleak-type gas-gas heater reheater, and a spray nozzle pipeline with an opening/closing valve to wash at least one of an element of the mist eliminator and an exhaust gas duct inner wall surface, and the periphery thereof with a washing liquid, the opening/closing valve of the spray nozzle pipeline being activated when the thermometer reads a temperature greater than or equal to a set temperature, the spray nozzle pipeline being provided at at least one of a front surface and a rear surface of the mist eliminator, the front surface of the mist eliminator being contacted by exhaust gas before the rear surface of the mist eliminator is contacted by the exhaust gas; and a configuration wherein at least one of a heat-resistant resin material and a corrosion preventive lining material resistant to dissipated heat from the nonleak-type gas-gas heater reheater during a shutdown of the absorption tower is provided on at least one of an element of the mist eliminator, an absorption tower outlet duct, an exhaust gas duct between the absorption tower and mist eliminator, and an exhaust gas duct between the mist eliminator and the nonleak-type gas-gas heater reheater. 6. A method for using an exhaust gas processing device including, in order from the upstream side of an exhaust gas flow direction, at least a nonleak-type gas-gas heater heat recovery unit, an absorption tower, a mist eliminator, and a nonleak-type gas-gas heater reheater for circulating a heat medium with respect to the heat recovery unit arranged in a duct for exhaust gas discharged from a fire furnace, wherein a heat suppression device for suppressing dissipated heat from the nonleak-type gas-gas heater reheater is arranged in an exhaust gas duct between the mist eliminator and nonleak-type gas-gas heater reheater, the method comprising activating the heat suppression device to suppress dissipated heat from the nonleak-type gas-gas heater reheater generated during a shutdown of the adsorption tower. 7. A method for using an exhaust gas processing device including, in order from the upstream side of an exhaust gas flow direction, at least a nonleak-type gas-gas heater heat recovery unit, an absorption tower, a mist eliminator, and a nonleak-type gas-gas heater reheater for circulating a heat medium with respect to the heat recovery unit arranged in a duct for exhaust gas discharged from a fire furnace, wherein a heat suppression device for suppressing dissipated heat from the nonleak-type gas-gas heater reheater is arranged in an exhaust gas duct between the mist eliminator and nonleak-type gas-gas heater reheater, the method comprising measuring a temperature of inner ambient air of the exhaust gas flow passage between the mist eliminator and the nonleak-type gas-gas heater reheater, and then washing the element of the mist eliminator and the periphery thereof when the measured temperature becomes greater or equal to a set value during a shutdown of the adsorption tower.
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