US 12,434,923 B2
Powder supply hopper pressurizing apparatus, gasifier unit, integrated gasification combined cycle and control method of powder supply hopper pressurizing apparatus
Yuichiro Urakata, Kanagawa (JP); Jun Kasai, Kanagawa (JP); and Koji Nishimura, Kanagawa (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Appl. No. 16/971,074
Filed by MITSUBISHI HITACHI POWER SYSTEMS, LTD., Yokohama (JP)
PCT Filed Feb. 15, 2019, PCT No. PCT/JP2019/005526
§ 371(c)(1), (2) Date Aug. 19, 2020,
PCT Pub. No. WO2019/163664, PCT Pub. Date Aug. 29, 2019.
Claims priority of application No. 2018-031062 (JP), filed on Feb. 23, 2018.
Prior Publication US 2020/0391962 A1, Dec. 17, 2020
Int. Cl. B65G 53/66 (2006.01); B65G 65/40 (2006.01); C10J 3/50 (2006.01); F02C 3/28 (2006.01)
CPC B65G 53/66 (2013.01) [B65G 65/40 (2013.01); C10J 3/50 (2013.01); F02C 3/28 (2013.01); B65G 2203/042 (2013.01); C10J 2200/15 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A powder supply hopper pressurizing apparatus, comprising:
a first buffer tank in which pressurizing gas to be supplied to a powder supply hopper that supplies pressurized powder fuel is configured to be accumulated at a predetermined pressure,
a second buffer tank that is provided in parallel with the first buffer tank and in which the pressurizing gas to be supplied to the powder supply hopper is configured to be accumulated at a predetermined pressure,
a gas supply system connected to the powder supply hopper, configured to supply the pressurizing gas toward the powder fuel stored in the powder supply hopper when supplying the pressurized powder fuel,
a pressurizing gas manufacturing device that is configured to supply the pressurizing gas to the first buffer tank, the second buffer tank and the gas supply system,
a first buffer tank inlet valve provided on a pressurizing gas manufacturing device side of the first buffer tank,
a first buffer tank outlet valve provided on a powder supply hopper side of the first buffer tank,
a second buffer tank inlet valve provided on a pressurizing gas manufacturing device side of the second buffer tank,
a second buffer tank outlet valve provided on a powder supply hopper side of the second buffer tank, and
a control unit programmed to control the first buffer tank to pressurize the powder supply hopper to a first pressure and to control the second buffer tank to pressurize the powder supply hopper to a second pressure, wherein
in a case where the control unit determines that one of the first buffer tank or the second buffer tank is non-usable, the control unit is programmed to pressurize the powder supply hopper by use of the first buffer tank or the second buffer tank that is operable, and the gas supply system, and
the control unit is programmed to determine that the first buffer tank is non-usable when the first buffer tank inlet valve or the first buffer tank outlet valve becomes out of order, indicates an abnormality, and does not operate, and to determine that the second buffer tank is non-usable when the second buffer tank inlet valve or the second buffer tank outlet valve becomes out of order, indicates an abnormality, and does not operate.