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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10471382 B1

PDFFull Text
Date of Patent:
Nov. 12, 2019

Filed:

Feb. 21, 2017

Air pollution control system

Applicant:

Mitsubishi Hitachi Power Systems, Ltd., Yokohama-shi, Kanagawa, JP;

Inventors:

Tsuyoshi Miyachi, Tokyo, JP;

Seiji Kagawa, Tokyo, JP;

Naoyuki Kamiyama, Tokyo, JP;

Tetsu Ushiku, Kanagawa, JP;

Assignee:

MITSUBISHI HITACHI POWER SYSTEMS, LTD., Kanagawa, JP;

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Jelitza M Perez

Int. Cl.
CPC ...
B01D 53/34 (2006.01); B01D 53/60 (2006.01); B01D 53/76 (2006.01); B01D 53/50 (2006.01); B01D 53/78 (2006.01); B01D 53/90 (2006.01); B03C 3/019 (2006.01); F23J 15/08 (2006.01); B01D 53/86 (2006.01); F23J 15/00 (2006.01); B03C 3/017 (2006.01); B01D 53/58 (2006.01); F23J 15/02 (2006.01); F23J 15/06 (2006.01);
U.S. Cl.
CPC ...
B01D 53/50 (2013.01); B01D 53/501 (2013.01); B01D 53/58 (2013.01); B01D 53/76 (2013.01); B01D 53/78 (2013.01); B01D 53/869 (2013.01); B01D 53/8609 (2013.01); B01D 53/8631 (2013.01); B01D 53/90 (2013.01); B03C 3/017 (2013.01); B03C 3/019 (2013.01); F23J 15/003 (2013.01); F23J 15/006 (2013.01); F23J 15/025 (2013.01); F23J 15/06 (2013.01); F23J 15/08 (2013.01); B01D 2251/2062 (2013.01); B01D 2251/502 (2013.01); B01D 2258/0283 (2013.01); F23J 2211/00 (2013.01); F23J 2215/10 (2013.01); F23J 2215/20 (2013.01); F23J 2217/102 (2013.01); F23J 2219/10 (2013.01); F23J 2900/15081 (2013.01);
Abstract

An air pollution control system includes a denitration device that removes nitrogen oxide in flue gas from a boiler; a heat transfer tube for recovering part of heat of the flue gas after denitration; a precipitator that removes soot and dust in the flue gas after heat recovery; a desulfurization device that removes sulfur oxide in the flue gas discharged from the precipitator; a heat transfer tube for heating the flue gas discharged from the desulfurization device; a circulation pump that circulates a heat medium between the heat transfer tubes; a heat medium heater provided to the circulation pipe to heat the heat medium; and a control device that controls the heat medium heater based on an ammonia concentration at an outlet of the denitration device. The control device causes the heat medium heater to heat the heat medium when the ammonia concentration is higher than a certain value.

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