Mitsubishi Heavy Industries Limited

Kageharu Moriyama

Masazumi Tanoura

Kenji Muta

Shinichiro Asami

Minoru Danno

Tadashi Aoki

Daishi Ueno

Atsushi Takita

Eiji Kato

Masatoshi Katsuki

Takashi Fujinaga

Yuuko Ujihara

Ichiro Awaya

A flow volume measurement device or a flow velocity measurement device include a measurement cell including a main pipe, an incident tube that is connected to the main pipe, an emission tube that is connected to the main pipe, and a first purge-fluid supply tube that is connected to the incident tube, a purge-fluid supply unit that supplies purge fluid into the first purge-fluid supply tube of the measurement cell, a light emitting unit that emits a laser beam to the measurement cell, a light receiving unit that receives the laser beam emitted from the light emitting unit and having passed through the measurement cell, and outputs a received amount of light as a light reception signal, a calculation unit that calculates a flow volume or a flow velocity of exhaust fluid flowing in the measurement cell, based on a light reception signal output from the light receiving unit.

Flow volume measurement device and flow velocity measurement device

An object of the present invention is to provide a flue gas purifying device that can efficiently decrease nitrogen oxides in flue gas. This object is solved by including: an exhaust pipe that guides flue gas discharged from a burning appliance; a urea-water injecting unit that injects urea water into the exhaust pipe; a catalytic unit arranged on a downstream side to a position where urea water is injected in a flow direction of flue gas and having a urea SCR catalyst; a first ammonia-concentration measuring unit that measures a concentration of ammonia in flue gas at a measurement position in a region where the catalytic unit is arranged; a second ammonia-concentration measuring unit arranged on a downstream side to the catalytic unit in a flow direction of the flue gas, to measure a concentration of ammonia in the flue gas having passed through the urea SCR catalyst; and a control unit that controls injection of urea water by the urea-water injecting unit based on measurement results acquired by the first and second ammonia-concentration measuring units.

Flue gas purifying device

An ammonia compound concentration measuring device includes: a pipe unit through which the circulating gas flows; a converter which is disposed in the pipe unit and converts an ammonia compound into ammonia; a measurement device which measures a first measurement value as a concentration of ammonia contained in a first circulating gas flowing inside a pipe line passing through the converter in the circulating gas flowing inside the pipe unit and a second measurement value as a concentration of ammonia contained in a second circulating gas flowing inside a pipe line not passing through the converter in the circulating gas flowing inside the pipe unit; and a controller which controls operations of the pipe unit and the measurement device and calculates the concentration of the ammonia compound of the measurement subject contained in the circulating gas from a difference between the first measurement value and the second measurement value.

Ammonia compound concentration measuring device and ammonia compound concentration measuring method

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Tokyo, Japan

Kageharu Moriyama