Mitsubishi Hitachi Power Systems, Ltd.

Mitsubishi Power, Ltd.

Mitsubishi Shipbuilding Co., Ltd.

Mitsubishi Heavy Industries Limited

Tetsu Ushiku

Susumu Okino

Hideo Suzuki

Seiji Kagawa

Naoyuki Kamiyama

Satoru Sugita

Toshihiro Fukuda

Tsuyoshi Miyachi

Ryozo Sasaki

Naoyuki Yoshizumi

Nobuyuki Ukai

Yusuke Watanabe

Tatsuto Nagayasu

Takashi Yoshimoto

Masayuki Eda

Hiroshi Nakashoji

Shigeru Yoshioka

Koichiro Hirayama

Provided is a desulfurization device that allows for the easy and accurate disposition of a spray pipe inside an absorption tower. Provided is a desulfurization device including: an absorption tower (); and a spray pipe () disposed inside the absorption tower (). The spray pipe () includes: a cylindrical pipe portion (), the leading end of which is closed; and an attachment flange () attached to the pipe portion (). The absorption tower () includes: an opening hole () opening toward the side; and a flange () disposed around the opening hole (). The attachment flange () and the flange () are detachably attached.

Desulfurization device

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 spray drying system for drying wastewater to be dried includes: an exhaust as introduction line for introducing the exhaust gas discharged from an exhaust gas generation source, the exhaust gas introduction line being connected to a plurality of exhaust gas ducts for allowing the exhaust gas to flow through; and at least one spray drying device connected to the exhaust gas introduction line and configured to bring the exhaust gas introduced from the exhaust gas introduction line into contact with the wastewater. The number of spray drying device is smaller than the number of the plurality of exhaust gas ducts.

Spray drying system

A method for installing a spray pipe, including an insertion step of inserting a spray pipe from an opening portion, a positioning step of positioning the spray pipe such that an installation surface of a leg portion faces a supporting surface of a supporting portion, a provisional tightening step of provisionally tightening a first fastening portion to couple an attachment flange with the opening portion, an adjusting step of adjusting the height of the installation surface relative to the supporting surface such that an axis along which a pipe portion extends coincides with the horizontal plane, in the provisionally tightened state resulting from the provisional tightening step, a coupling step of coupling the leg portion to the supporting portion by means of a second fastening portion, after the adjusting step, and a final tightening step of performing a final tightening of the first fastening portion after the coupling step.

Method for installing spray pipe

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

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

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 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

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.

Growing community of inventors

Kanagawa, Japan

Tetsu Ushiku