Mitsubishi Hitachi Power Systems, Ltd.

Mitsubishi Heavy Industries Limited

Mitsubishi Power, Ltd.

Mitsubishi Heavy Industries Engineering, Ltd.

Mitsubishi Shipbuilding Co., Ltd.

Mitsubishi Power Systems, Ltd.

Naoyuki Kamiyama

Seiji Kagawa

Toshihiro Fukuda

Tatsuto Nagayasu

Nobuyuki Ukai

Susumu Okino

Tetsu Ushiku

Tsuyoshi Oishi

Hiromitsu Nagayasu

Hiroshi Tanaka

Takuya Hirata

Takashi Kamijo

Tatsuya Tsujiuchi

Satoru Sugita

Masayuki Inui

Seiji Yoshihara

Shintaro Honjo

Norikazu Inaba

Takuya Okamoto

Jun Hashimoto

Tsuyoshi Miyachi

Toru Takashina

Yoshito Tanaka

Yuichiro Sato

Kenichi Okada

Koichiro Hirayama

Kazuto Kobayashi

Hideki Ito

Satoshi Nakamura

Kozo Iida

Yusuke Watanabe

Masakazu Onizuka

Shigeru Nojima

Takashi Yoshimoto

Kenji Inoue

Moritoshi Murakami

Koichiro Iwashita

Toshihiko Setoguchi

Yasuhiro Takeuchi

Yasutoshi Ueda

Takeo Shinoda

Koutaro Fujimura

Motofumi Ito

Jun Satou

Tsumoru Nakamura

Ryozo Sasaki

Tsuyoshi Ohishi

Takuro Soeda

Makoto Tsutsui

Tsuyoshi Miyaji

Tomoo Akiyama

Yoshihisa Yamamoto

Koichi Tagami

Kouzou Takano

An apparatus is disclosed including a desulfurization device which removes sulfur oxides contained in boiler flue gas, a spray drying device which sprays desulfurization waste water discharged from the desulfurization device and which dries the waste water by introducing a drying gas, a flue gas supplying line Lwhich returns, to a main flue L, flue gas obtained after the desulfurization waste water is evaporated and dried, an alkaline agent supplying unit which adds an alkaline agent to a desulfurization waste water line L, and a pH meter which measures the pH in the desulfurization waste water at locations before and after the alkaline agent supplying unit in the desulfurization waste water line L, wherein the alkaline agent is added in accordance with a measurement result of a measured pH to cause the desulfurization waste water added with the alkaline agent to have a pH fall within a predetermined pH.

Non-waste water flue gas treatment system and non-waste water flue gas treatment method

A ship desulfurization device for desulfurizing exhaust gas discharged from an exhaust gas generation device mounted to a ship includes: an absorber including an absorber body unit defining an interior space having a longitudinal direction and having an exhaust gas introducing port formed on an end portion of the absorber body unit with respect to the longitudinal direction, the exhaust gas introducing port being in communication with the interior space; and an exhaust gas introducing device for introducing exhaust gas discharged from the exhaust gas generation device to the absorber body unit. When L is a maximum length of the interior space of the absorber body unit with respect to the longitudinal direction, and W is a maximum width of the interior space of the absorber body unit with respect to a lateral direction that is orthogonal to the longitudinal direction, a ratio (W:L) of the maximum width W to the maximum length L is within a range of 1:over 1.1 and 1:6.0 or under 6.0.

Ship desulfurization device and ship equipped with ship desulfurization device

SOremoval equipment for reducing sulfur oxides from flue gas from a boiler, a cooler which is provided on a downstream side of the SOremoval equipment for reducing the sulfur oxides that remain in the flue gas and for decreasing a gas temperature, COrecovery equipment which includes a COabsorber, and an absorption liquid regenerator, and mist generation material reduction equipment for reducing a mist generation material which is a generation source of mist that is generated in the COabsorber of the COrecovery equipment before introducing the flue gas to the COrecovery equipment are included.

Air pollution control system and method

A cement solidification device for waste includes a slurrying vesselthat dissolves and slurries wastecontaining harmful substances and deliquescent compounds in solvent waterto obtain slurried material; an iron-based additive supply unitthat adds an iron-based additiveto the slurrying vessel; a cement kneading vesselthat adds a cement solidifying agentfrom a cement-solidifying agent supply unitto the slurried materialin which the iron-based additiveis mixed to obtain a cement kneaded product; and a cement solidification unitthat cures the cement kneaded productto form a cement solidified product

Cement solidification device for waste and method therefor, and zero-liquid discharge air pollution control system and method therefor

Flue gas generated when fuel is subjected to combustion by a combustor such as a boiler is supplied, and a sulfur oxide is reduced or removed from the supplied flue gas. A desulfurization apparatusA includes an absorber, a gas introduction unit, an absorbent jetting unit, a plurality of water flow oxidation devices, an absorbent supplying unit, a demister, a gas discharging unit, and a control devicethat varies the number of water flow oxidation devicesthat jet absorbentand airbased on a rate of the sulfur compound in the absorbentwithin an absorbent storage tankA.

Wet flue gas desulfurization apparatus and operation method for wet flue gas desulfurization apparatus

A desulfurization apparatus includes a blowdown water line, an organic matter remover, an absorber, and a makeup water introducing line. The blowdown water line is for introducing boiler cooling tower blowdown water from a boiler cooling tower. The organic matter remover is disposed on the blowdown water line to remove organic matter in the boiler cooling tower blowdown water by activated carbon. The absorber is configured to absorb sulfur oxides in flue gas from a boiler. The makeup water introducing line is for introducing the boiler cooling tower blowdown water from which the organic matter has been removed as makeup water for the absorber.

Desulfurization apparatus and method of operating desulfurization apparatus

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.

Air pollution control system

A heat exchanger includes a heat recovery unit that causes a heat medium to recover heat from flue gas through first heat exchange by bringing the flue gas into contact with a fin tube; a reheater including a preheating unit configured to preheat flue gas through second heat exchange by bringing the flue gas into contact with a tube, and heating units that heat the flue gas through third heat exchange by bringing the flue gas into contact with the heat medium; and a control unit that calculates a recovered heat quantity to be recovered by the heat recovery unit from the flue gas through the first heat exchange, and that controls temperature of the heat medium after the first heat exchange within a predetermined range.

Heat exchanger and method for controlling heat exchanger

Provided is an absorber that removes sulfur oxide in a flue gas with an absorbent, an absorbent storing unit that stores the absorbent that has absorbed the sulfur oxide, an oxidation-reduction potential meter that measures an oxidation-reduction potential of the absorbent in the absorbent storing unit, a reducing additive supplying unit that supplies a sulfur oxoacid reducing additive into the absorbent storing unit, and a control device that controls the reducing additive supplying unit based on a measured value of the oxidation-reduction potential of the absorbent measured with the oxidation-reduction potential meter, wherein the reducing additive supplying unit supplies the sulfur oxoacid reducing additive when the measured value of the oxidation-reduction potential has exceeded an upper limit of an appropriate range of the oxidation-reduction potential.

Wet type flue gas desulfurization apparatus and operation method of the same

A limestone supply device is provided for supplying calcium carbonate to an upstream of a desulfurization device and a heat exchanger disposed on an upstream of the desulfurization device on a flue gas duct through which flue gas discharged from a combustion engine in which a fuel burns flows. An air pollution control system having the limestone supply device is provided, including a calcium carbonate accumulate unit configured to accumulate calcium carbonate, a calcium carbonate transport unit configured to transport the calcium carbonate accumulated in the calcium carbonate accumulate unit, a calcium carbonate supply unit configured to supply the calcium carbonate transported by the calcium carbonate transport unit to the flue gas duct, and a moisture supply unit configured to supply moisture to a region to which the calcium carbonate is supplied by the calcium carbonate supply unit.

Limestone supply device and air pollution control system

Provided are: an NOx removal unit to remove nitrogen oxide; an air preheater on a downstream side of the NOx removal unit to recover heat; a precipitator on a downstream side of the air preheater to remove ash dust; a gas-liquid contact type desulfurization unit on a downstream side of the precipitator to remove sulfur oxide; an SOremoving agent supply unit to supply an SOremoving agent at a supply unit on an upstream side of the precipitator; and a wet state processing unit between the air preheater and the supply unit to supply water to a flue gas to be made into a wet state; the wet state processing unit having a stand-up portion, a partition unit and a droplet supply unit.

Flue gas treatment device

Provided is an air pollution control system including: a denitration apparatus; an air heater; a precipitator; a desulfurization apparatus; a dehydrator; a spray drying apparatus provided with a spray unit that is configured to spray dehydrated filtrate supplied from the dehydrator; a flue gas introduction line through which a branch gas branched from the flue gas is introduced to the spray drying apparatus; a flue gas supply line through which a flue gas from the spray drying apparatus returns to a main flue gas duct; a solid content separator that performs a solid-gas separation on solid contents contained in the flue gas; and a kneader that performs kneading and immobilizing treatment on the separated solid contents together with an immobilization aid.

Air pollution control system and air pollution control method

The air pollution control system including: a flue gas duct through which flue gas flows; a heat exchanger provided to the flue gas duct; a limestone supply device for reducing SOin the flue gas supplies CaCOto the flue gas flowing in an upstream of the heat exchanger; an upstream SOmeasurement device measures the SOin the flue gas flowing in a stream upper than a position where the limestone supply device supplies the CaCO; and a control device determines a quantity supplied of the CaCObased on a relationship between a quantity of the SOmeasured by the upstream SOmeasurement device and a molar ratio of SOto CaCOand which supplies the determined quantity supplied of the CaCOfrom the limestone supply device to the flue gas duct.

When a liquid level is changed even though an inflow of a heat medium into a specific heat transfer tube bundle is stopped, it is determined that there is no abnormality in the heat transfer tube bundle in which the inflow of the heat medium is stopped and then another heat transfer tube bundle is inspected. Next, when the inflow of the heat medium into the specific heat transfer tube bundle is stopped not to cause the change in the liquid level, it is determined that there is an abnormality in the heat transfer tube bundle to which the inflow of the heat medium is stopped. Thus, it is possible to determine that there is an abnormality in the heat transfer tube bundle in which the inflow of the heat medium is stopped.

Leakage inspection method of heat exchanger

Growing community of inventors

Tokyo, Japan

Naoyuki Kamiyama