Mitsubishi Heavy Industries Limited

Mitsubishi Hitachi Power Systems, Ltd.

Mitsubishi Power, Ltd.

Tsuyoshi Miyachi

Seiji Kagawa

Tetsu Ushiku

Takuya Okamoto

Naoyuki Kamiyama

Satoru Sugita

Hideaki Sakurai

Ryozo Sasaki

Naoyuki Yoshizumi

Yuichiro Sato

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

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

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

A resin coating layer according to the present invention is formed by curing a thermo-setting resin composition on an inner wall of a heat transfer tube. Forming the resin coating layer allows the heat transfer tube to be easily repaired without involving a cutting process of the heat transfer tube.

Resin coating layer and life-extension method for piping

A steel covering layer according to the present invention includes a surface layer formed of a low surface energy material and formed on the surface of a heat transfer tube.

Steel covering layer and method of surface treatment of heat transfer tube

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.

Growing community of inventors

Tokyo, Japan

Tsuyoshi Miyachi