Mitsubishi Heavy Industries Limited

Mitsubishi Hitachi Power Systems, Ltd.

Mitsubishi Power, Ltd.

The Kansai Electric Power Co., Inc.

The Tokyo Electric Power Company, Incorporated

Central Research Institute of Electric Power Industry

Chubu Electric Power Company, Inc.

The Chugoku Electric Power Co., Inc.

Tohoku Electric Power Company, Inc.

Electric Power Development Co., Ltd.

Kyushu Electric Power Co., Inc.

Hokkaido Electric Power Company, Inc.

Shikoku Electric Power Co., Inc.

Hokuriku Electric Power Company

Joban Joint Power Co., Ltd.

Jun Kasai

Koji Nishimura

Keigo Matsumoto

Kazuhiro Domoto

Yuichiro Urakata

Naofumi Abe

Toshimitsu Ichinose

Koutaro Fujimura

Yoshinori Koyama

Yasunari Shibata

Katsuhiko Yokohama

Yukihiro Tominaga

Ryuichiro Tanaka

Shinya Hamasaki

Toshimi Ohtsuka

A powder supply hopper pressurizing apparatus including a first buffer tank in which pressurizing gas to be supplied to a powder supply hopper is accumulated at a predetermined pressure, a second buffer tank, a lower part pressure adjustment nitrogen system connected to the powder supply hopper, to supply the gas toward powder fuel stored in the powder supply hopper when supplying the powder fuel to a burner, and a control unit that controls the first buffer tank to pressurize the powder supply hopper to a first pressure and then controls the second buffer tank to pressurize the powder supply hopper to a second pressure, and where the control unit determines that one of the first buffer tank or the second buffer tank is non-usable, the control unit pressurizes the powder supply hopper by use of the first or second buffer tank that is operable, and the gas supply system.

Powder supply hopper pressurizing apparatus, gasifier unit, integrated gasification combined cycle and control method of powder supply hopper pressurizing apparatus

The object is to provide a powder fuel feed apparatus, a gasifier unit, and an integrated gasification combined cycle and a control method of a powder fuel feed apparatus that can suppress deformation of a sintered metal filter with simple and inexpensive configuration. An embodiment includes: a distributor pipe () in which a mixed gas containing moisture and a gas in which pulverized coal and nitrogen transported with the pulverized coal are mixed is transported; and a diluting nitrogen system () that, when a flow velocity of the mixed gas is less than a predetermined threshold, additionally supplies a diluting nitrogen to a mixing chamber () connected to the distributor pipe () and forming a part of the distributor pipe (), and the diluting nitrogen system () continuously supplies a predetermined flow rate of the diluting nitrogen to the mixing chamber ().

Powder fuel feed apparatus, gasifier unit, and integrated gasification combined cycle and control method of powder fuel feed apparatus

A pressurizing nozzle includes a nozzle body; a filter that is provided to be perpendicular to the central axis direction of the nozzle body so as to cover the internal cross section of the nozzle body at the leading end portion on one end of the nozzle body and that is made of sintered metal having a prescribed thickness in the central axis direction; a retainer having an annular shape that is mounted to the leading end portion of the nozzle body so as to be disassemble and that fixes the outer circumferential portion of the filter via a pair of sealing parts; and a sealing portion that is disposed along the outer circumferential end face of the filter and that seals a fluid from flowing from the outer circumferential face toward the outside in the radial direction through the filter.

Nozzle with filter, gasification combined cycle power generator, and method for disassembling filter from nozzle with filter

An object of the present invention is to provide a pulverized coal drying system for a pulverizer, a pulverized coal drying method therefor, a pulverized coal drying program, a pulverizer, and an integrated gasification combined cycle capable of stably drying a carbonaceous feedstock irrespective of the type of the carbonaceous feedstock to be used. There is provided a controller () of a pulverizer () that dries a supplied carbonaceous feedstock by using a drying fluid and includes a flow rate controller that controls the flow rate of the drying fluid within upper and lower limits of the flow rate of the drying fluid that are set to dry a plurality of types of the carbonaceous feedstock having different moisture contents in such a way that the temperature of the drying fluid discharged from the pulverizer () approaches a target temperature.

Pulverized coal drying system for pulverizer, pulverized coal drying method therefor, pulverized coal drying program, pulverizer, and integrated gasification combined cycle

Provided is a powder fuel supply apparatus comprising a distributor () that branches supplied powder fuel to a plurality of branch tubes (), a plurality of burners () connected to downstream ends () of the plurality of branch tubes (), respectively, to supply char into a gasification furnace that gasifies the powder fuel, a flow nozzle () provided in each of the plurality of branch tubes (), to apply pressure loss to char flow in the branch tube (), a differential pressure gauge () that measures a differential pressure generated by the flow nozzle (), and a control unit that determines decrease in flow velocity of the char flow based on the differential pressure obtained by the differential pressure gauge ().

Powder fuel supply apparatus, gasfier unit, integrated gasification combined cycle, and control method of powder fuel supply apparatus

A pulverized-fuel supply unit includes a hopper, first nozzles, second nozzles, a pressurizing-gas supply device, a fluidization-gas supply device, and a pulverized-fuel supply line. The hopper has a hollow to store therein pulverized fuel. The first nozzles are provided to the hopper. The second nozzles are provided to a vertically lower part of the hopper below the plurality of first nozzles. The pressurizing-gas supply device is configured to supply pressurizing gas to increase internal pressure of the hopper. The fluidization-gas supply device is configured to supply fluidization gas to fluidize the pulverized fuel in the hopper. The pulverized-fuel supply line is provided to a vertically lower part of the hopper. The pressurizing-gas supply device supplies pressurizing gas to the first nozzles and the second nozzles. The fluidization-gas supply device supplies fluidization gas to the second nozzles.

Pulverized-fuel supply unit and method, and integrated gasification combined cycle

A combustion burner includes a plurality of splitters (), (), () configured to divide a fuel gas flow by a widened portion where a width of the widened portion increases as the widened portion extends in the direction of the fuel gas flow. The splitters include: slitted splitters (), () configured to slits (SL) at a downstream end in the fuel gas flow; and non-slitted splitters () configured to adjacently to the slitted splitters (), (), each of the non-slitted splitters () configured to the widened portion at a downstream end in the fuel gas flow, and configured to a fixed width in a direction of the longitudinal axis.

Combustion burner and boiler equipped with the same

A solid-fuel-fired burner that suppresses a high-temperature oxygen remaining region formed at the outer circumference of a flame and that can decrease the amount of NOx eventually produced is provided. A solid-fuel-fired burner that is used in a burner section of a solid-fuel-fired boiler for performing low-NOx combustion separately in the burner section and in an additional-air injection section and that injects powdered solid-fuel and air into a furnace includes a fuel burner having internal flame stabilization and a secondary-air injection port that does not perform flame stabilization, in which the air ratio in the fuel burner is set to 0.85 or more.

Solid-fuel-fired burner and solid-fuel-fired boiler

A combustion burnerincludes a fuel nozzlethat injects fuel gas prepared by mixing solid fuel and primary air, secondary air nozzlesthat inject secondary air from the outer periphery of the fuel nozzle, and a flame holderthat is arranged in an opening of the fuel nozzle. In the combustion burner, the flame holderhas a splitting shape that widens in the flow direction of the fuel gas. When seen in cross section along a direction in which the flame holderwidens, the cross section passing through the central axis of the fuel nozzle, a maximum distance h from the central axis of the fuel nozzleto the widened end of the flame holderand an inside diameter r of the openingof the fuel nozzlesatisfy h/(r/2)&#x3c;0.6.

Combustion burner and boiler including the same

An oil-fired burner (A) for warming, disposed adjacent to the outer periphery of a pulverized coal burner which inputs pulverized coal and air into a furnace, includes: an oil gun () for inputting an oil fuel disposed at the center of an outlet opening of a nozzle main body () substantially rectangular in cross-section; and a secondary air input port () disposed so as to surround the outer periphery of the oil gun (), wherein the secondary air input port () is constituted of: a central arc section () substantially similar in shape to a circular diffuser () mounted on the leading end side of the oil gun (); and rectangular sections (L,R) provided continuously from both sides of the central arc section () and narrowed in face-to-face dimension in the direction of the adjacent pulverized coal burners so as to increase the distance from them.

Oil-fired burner, solid fuel-fired burner unit, and solid fuel-fired boiler

Provided is a combustion burner including: a fuel nozzle () that is able to blow a fuel gas obtained by mixing pulverized coal with primary air; a secondary air nozzle () that is able to blow secondary air from the outside of the fuel nozzle (); a flame stabilizer () that is provided at a front end portion of the fuel nozzle () so as to be near the axis center; and a rectification member () that is provided between the inner wall surface of the fuel nozzle () and the flame stabilizer (), wherein an appropriate flow of a fuel gas obtained by mixing solid fuel with air may be realized.

Combustion burner, solid-fuel-combustion burner, solid-fuel-combustion boiler, boiler, and method for operating boiler

A leading end located in a two-stage entrained-flow bed coal gasifier has a double-walled structure including an outer cylinder and an inner cylinder, and cooling water for cooling the leading end is supplied through an interior of the inner cylinder to cool the leading end and is then returned to a base end through a space formed between the outer cylinder and the inner cylinder. The space formed between the outer cylinder and the inner cylinder has a smaller channel area than the interior of the inner cylinder, and a swirling flow along a guide formed on an outer circumferential surface of the inner cylinder and a substantially linear flow in a longitudinal direction of the outer cylinder and the inner cylinder are applied to the cooling water returned to the base end through the space formed between the outer cylinder and the inner cylinder.

Growing community of inventors

Tokyo, Japan

Jun Kasai