Mitsubishi Heavy Industries Limited

Yoshifumi Masuda

Fuminori Fujii

Masaharu Nishimura

Masazumi Kataoka

Michio Matsumoto

Makoto Kato

Satoshi Uchida

Katsuhiko Abe

Yoshinori Hyakutake

Satoshi Tanimura

Kazufumi Ikeda

Toyosei Aota

Takanori Ito

Tomonori Toda

Tei Yamato

An exhaust flue includes an exhaust chimney body, and an open end multi-hole area. The exhaust chimney body defines a passage for discharging exhaust gas. The open end multi-hole area is an area in which multiple holes are defined around a total circumference of an open end of the exhaust chimney body.

Exhaust flue

A gas turbine exhaust passage is realized which may suppress the radiation of strong ultra low frequency noise to the outside without amplifying the turbulence of an high speed exhaust gas flow rate or a pressure pulsation generated in a gas turbine. At least a portion of a wall of a gas turbine exhaust passage () is formed of an acoustically transmissive material () for allowing a low frequency noise of several tens of Hz or less to pass therethrough sufficiently. Also, the acoustically transmissive material is made of one or more of a porous material, a porous heat insulating material, a mesh having a large flow resistance, cloth or film material. Further, the acoustically transmissive material is supported by a porous plate or a frame. In a case where an acoustically transmissive material is used only for an exhaust chimney (), the exhaust chimney () is supported by a rack (). Further, a soundproof panel () may be attached to the rack (). Also, a damper provided at a branch portion between an exhaust gas boiler branched from the gas turbine exhaust passage and the gas turbine exhaust passage is formed of acoustically transmissive material for allowing a low frequency noise of several tens of Hz or less to pass therethrough sufficiently.

Gas turbine exhaust passage and damper system for same

A gas turbine exhaust passage is realized which may suppress the radiation of strong ultra low frequency noise to the outside without amplifying the turbulence of an high speed exhaust gas flow rate or a pressure pulsation generated in a gas turbine. At least a portion of a wall of a gas turbine exhaust passage ( ) is formed of an acoustically transmissive material ( ) for allowing a low frequency noise of several tens of Hz or less to pass therethrough sufficiently. Also, the acoustically transmissive material is made of one or more of a porous material, a porous heat insulating material, a mesh having a large flow resistance, cloth or film material. Further, the acoustically transmissive material is supported by a porous plate or a frame. In a case where an acoustically transmissive material is used only for an exhaust chimney ( ), the exhaust chimney ( ) is supported by a rack ( ). Further, a soundproof panel ( ) may be attached to the rack ( ). Also, a damper provided at a branch portion between an exhaust gas boiler branched from the gas turbine exhaust passage and the gas turbine exhaust passage is formed of acoustically transmissive material for allowing a low frequency noise of several tens of Hz or less to pass therethrough sufficiently.

Gas turbine exhaust passage and damper system for same having a non-enclosed porous peripheral wall

A pressurized fluidized bed combined electricity generation system for improving gas turbine output increases and prevention of surging is provided. This pressurized fluidized bed combined electricity generation system is a combined electricity generation system including a steam turbine; a pressurized fluidized bed boiler for generating steam for supply to the steam turbine by combusting air from an air supply system and fuel from a fuel supply system; a gas turbine driven by exhaust gas such as combustion gas from the pressurized fluidized bed boiler and air; and a compressor directly coupled to the gas turbine. In addition, this pressurized fluidized bed combined electricity generation system has a first bypass duct communicating between the outlet side of the compressor and the exhaust gas side of the gas turbine and having a switching valve; a second bypass duct communicating between the outlet side of the compressor and the inlet side of the gas turbine and having a switching valve; and a control device which receives measured pressure values of a pressure detector which measures the pressure at the outlet of the compressor. This control device controls the switching valves of the first and second bypass ducts based on the relationship between the degree of opening of the inlet variable guide vane of the compressor which is determined in advance and a surge limiting pressure. A part of the steam generated by the pressurized fluidized bed boiler is extracted, mixed in with the exhaust gas or the above-mentioned air, and supplied to the gas turbine. Air from the compressor is supplied as fuel for the pressurized fluidized bed boiler.

Pressurized fluidized bed combined electricity generation system

A pressurized fluidized bed combined electricity generation system for improving gas turbine output increases and prevention of surging is provided. This pressurized fluidized bed combined electricity generation system is a combined electricity generation system including a steam turbine; a pressurized fluidized bed boiler for generating steam for supply to the steam turbine by combusting air from an air supply system and fuel from a fuel supply system; a gas turbine driven by exhaust gas such as combustion gas from the pressurized fluidized bed boiler and the air; and a compressor directly coupled to the gas turbine. In addition, this pressurized fluidized bed combined electricity generation system has a first bypass duct communicating between the outlet side of the compressor and the exhaust gas side of the gas turbine and having a switching valve; a second bypass duct communicating between the outlet side of the compressor and the inlet side of the gas turbine and having a switching valve; and a control device which receives measured pressure values of a pressure detector which measures the pressure at the outlet of the compressor. This control device controls the switching valves of the first and second bypass ducts based on the relationship between the degree of opening of the inlet variable guide vane of the compressor which is determined in advance and a surge limiting pressure. A part of the steam generated by the pressurized fluidized bed boiler is extracted, mixed in with the exhaust gas or the above-mentioned air, and supplied to the gas turbine. Air from the compressor is supplied as fuel for the pressurized fluidized bed boiler.

Pressurized fluidized-bed combined cycle power generation system

A cleaning method for a flame detector of a gas turbine activating combustor, comprising branching control air for forcing a spark plug of an ignition system into the gas turbine activating combustor, and blowing the branched control air against the respective inner surfaces of light sensor glasses of a flame detector, thereby blowing off dust or soot from the glass.

Growing community of inventors

Hyogo-ken, Japan

Yoshifumi Masuda