Title:
EXHAUST GAS PROCESSING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/235110
Kind Code:
A1
Abstract:
In this exhaust gas processing device (4), a collected dust and ash returning unit (44) transports collected dust and ash, which have been collected at a dust collection machine (43), along a return route (441) that is different from a flue (3), to a position (P2) between the dust collection machine (43) and a combustion chamber (2) in the flue (3). A collected dust and ash distribution unit (45) distributes the collected dust and ash, which have been collected at the dust collection machine (43), to the collected dust and ash returning unit (44) and the collected dust and ash discharge unit (47) disposed at a discharge position external to the flue (3). Concentration measurement units (481, 482) acquire measurement values for the mercury concentration within the exhaust gas. In a highly concentrated state, wherein an evaluation value that is based on the measurement values is greater than a threshold value, the distribution ratio of the collected dust and ash to the collected dust and ash discharge unit (47) by the collected dust and ash distribution unit (45) is increased from that in an ordinary state. In this manner, a return of collected dust and ash containing large amounts of mercury to the flue (3) can be suppressed, and as a result, the mercury concentration in the exhaust gas can be reduced more reliably in this exhaust gas processing device (4).
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Inventors:
FURUBAYASHI MICHITAKA (JP)
KATO ATSUSHI (JP)
KATO ATSUSHI (JP)
Application Number:
PCT/JP2019/017912
Publication Date:
December 12, 2019
Filing Date:
April 26, 2019
Export Citation:
Assignee:
HITACHI SHIPBUILDING ENG CO (JP)
International Classes:
B01D53/64; B01D53/68; B01D53/83; B09B3/00
Domestic Patent References:
| WO2016136714A1 | 2016-09-01 | |||
| WO2008078721A1 | 2008-07-03 |
Foreign References:
| JP2014024052A | 2014-02-06 | |||
| JP2016097321A | 2016-05-30 | |||
| JP2017213499A | 2017-12-07 | |||
| JP2018065063A | 2018-04-26 |
Attorney, Agent or Firm:
MATSUSAKA, Masahiro et al. (JP)
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