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

Patent metadata

Field	Value
Publication number	US-2021002566-A1
Application number	US-201916969264-A
Country	US
Kind code	A1
Filing date	Feb 12, 2019
Priority date	Feb 19, 2018
Publication date	Jan 7, 2021
Grant date	—

Abstract

Provided is a powder fuel supply apparatus comprising a distributor ( 84 ) that branches supplied powder fuel to a plurality of branch tubes ( 82 ), a plurality of burners ( 126 a ) connected to downstream ends ( 82 a ) of the plurality of branch tubes ( 82 ), respectively, to supply char into a gasification furnace that gasifies the powder fuel, a flow nozzle ( 85 ) provided in each of the plurality of branch tubes ( 82 ), to apply pressure loss to char flow in the branch tube ( 82 ), a differential pressure gauge ( 86 ) that measures a differential pressure generated by the flow nozzle ( 85 ), 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 ( 86 ).

First claim

1 . 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 the powder fuel 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 powder fuel flow in the branch tube, and to equally distribute a flow rate of the powder fuel flowing through each of the branch tubes, a pressure loss measuring unit for measuring a differential pressure generated by the flow nozzle, and a control unit that determines decrease in flow velocity of the powder fuel based on the differential pressure.

2 . The powder fuel supply apparatus according to claim 1 , further comprising:
an inert gas additional supply unit for additionally supplying an inert gas to powder fuel flow of pulverized fuel flowing together with the inert gas toward the distributor, and a control unit that increases a flow rate of the inert gas to be additionally supplied from the inert gas additional supply unit in a case where decrease in flow velocity of the powder fuel flowing through the branch tube is determined based on the differential pressure.

3 . 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 the powder fuel into a gasification furnace that gasifies the powder fuel, a temperature measuring unit for measuring a downstream end temperature in the downstream end of each of the branch tubes, and a control unit that determines decrease in flow velocity of the powder fuel based on the downstream end temperature.

4 . The powder fuel supply apparatus according to claim 3 , further comprising:
an inert gas additional supply unit for additionally supplying an inert gas to powder fuel flow of pulverized fuel flowing together with the inert gas toward the distributor, and a control unit that increases a flow rate of the inert gas to be additionally supplied from the inert gas additional supply unit in a case where decrease in flow velocity of the powder fuel flowing through the branch tube is determined based on the downstream end temperature.

5 . The powder fuel supply apparatus according to claim 1 , wherein the branch tube comprises a powder fuel density measuring unit for measuring a density of the powder fuel.

6 . Gasifier unit comprising:
the powder fuel supply apparatus according to claim 1 , and the gasification furnace into which the powder fuel is supplied from the powder fuel supply apparatus.

7 . Integrated gasification combined cycle comprising:
the gasifier unit according to claim 6 , a gas turbine that combusts at least a part of raw syngas obtained by the gasifier unit to rotate and drive, a steam turbine that rotates and drives with steam generated by a heat recovery steam generator into which turbine flue gas discharged from the gas turbine is introduced, and a generator rotatably coupled to the gas turbine and/or the steam turbine.

8 . A control method of 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 the powder fuel 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 powder fuel flow in the branch tube, and to equally distribute a flow rate of the powder fuel flowing through each of the branch tubes, and a pressure loss measuring unit for measuring a differential pressure generated by the flow nozzle, the control method of the powder fuel supply apparatus, comprising: determining decrease in flow velocity of the powder fuel based on the differential pressure.

9 . A control method of 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 the powder fuel into a gasification furnace that gasifies the powder fuel, and a temperature measuring unit for measuring a downstream end temperature in the downstream end of each of the branch tubes, the control method of the powder fuel supply apparatus, comprising: determining decrease in flow velocity of the powder fuel based on the downstream end temperature.

Assignees

• Mitsubishi Hitachi Power Sys

Inventors

• Urakata Yuichiro
• Nishimura Koji
• Kasai Jun

Classifications

• C10J2300/1653

  integrated in a gasification combined cycle [IGCC] · CPC title

• Y02P20/129

  Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines · CPC title

• C10J2300/1606

  Combustion processes · CPC title

• C10J2300/093

  Coal · CPC title

• C10J2300/0959

  Oxygen · CPC title