Compressor system

Patent metadata

Field	Value
Publication number	US-12305653-B2
Application number	US-202017778217-A
Country	US
Kind code	B2
Filing date	Dec 7, 2020
Priority date	Dec 20, 2019
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

The present invention provides a compressor system including a plurality of compressor trains each including a gas turbine and a compression part including a compressor driven by the gas turbine, and a fluid feeding part for distributing a fluid fed from one fluid source to each of the compressors in the plurality of compressor trains. The gas turbine includes a gas turbine compressor for compressing air, a combustor for generating a combustion gas, a high-pressure turbine including a high-pressure turbine rotor mechanically coupled to a compressor rotor, and a low-pressure turbine including a low-pressure turbine rotor disposed away from the high-pressure turbine rotor. The plurality of compressor trains can be operated in parallel.

First claim

The invention claimed is:

1. A compressor system comprising:
compressor trains each of which comprises:
a multi-shaft gas turbine; and
a compression unit comprising a first compressor and a second compressor both driven by the multi-shaft gas turbine, wherein the second compressor compresses a different fluid than the first compressor does;

a first fluid supply unit that:
comprises a fluid supply source, and
distributes and supplies a fluid supplied from the fluid supply source to the first compressor of each of the compressor trains,

a second fluid supply unit that:
is independent of the first fluid supply unit, and
distributes and supplies the different fluid under different conditions to the second compressor of each of the compressor trains, and

a control unit configured to control operating conditions of the compressor trains, wherein
the multi-shaft gas turbine of each of the compressor trains comprises:
a gas turbine compressor that:
comprises a compressor rotor, and
compresses air with rotation of the compressor rotor;

a combustor that produces a combustion gas by using: the air compressed by the gas turbine compressor, and fuel;
a high-pressure turbine that comprises a high-pressure turbine rotor that:
is mechanically connected to the compressor rotor, and
is rotationally driven by the combustion gas; and

a low-pressure turbine that comprises a low-pressure turbine rotor:
disposed separately from the high-pressure turbine rotor, and
rotationally driven by the combustion gas after the high-pressure turbine rotor is rotationally driven,

the low-pressure turbine rotor rotates independently of the high-pressure turbine rotor,
the compression unit of each of the compressor trains further comprises a pressure sensor that:
acquires a pressure value of a pressure at a suction port of the second compressor, and
sends information about the pressure value to the control unit,

a first compression unit rotor of the first compressor is mechanically connected to the low-pressure turbine rotor,
a second compression unit rotor of the second compressor is mechanically connected to the first compression unit rotor,
the compressor trains are configured to operate independently or in parallel,
the compressor trains include a first compressor train and a second compressor train,
the control unit is configured to decrease, in response to stoppage of the second compressor train while the first compressor train continues to operate, a flow rate of the fluid supplied to the first compressor of the operating first compressor train, and:

the control unit is configured to increase, in response to the pressure value acquired in the operating first compressor train exceeding a predetermined reference value, an amount of the fuel supplied to the combustor of the operating first compressor train to increase a rotation speed of the low-pressure turbine rotor of the operating first compressor train.

2. The compressor system according to claim 1 , wherein the control unit is configured to increase, in the operating first compressor train in response to the stoppage of the second compressor train, an amount of the different fluid returning to the suction port of the second compressor after being compressed by the second compressor.

3. The compressor system according to claim 2 , wherein
the compression unit comprises:
a bypass flow path that connects the suction port of the second compressor and a discharge port of the second compressor such that the different fluid discharged from the discharge port of the second compressor returns to the suction port of the second compressor; and
a bypass valve in the bypass flow path that adjusts a flow rate of the different fluid flowing through the bypass flow path, and

the control unit is configured to send, in response to the stoppage of the second compressor train, an instruction to increase an opening degree of the bypass valve of the compression unit of the operating first compressor train such that the flow rate of the different fluid flowing through the bypass flow path is increased.

4. The compressor system according to claim 1 , wherein the control unit is configured to increase, in response to the stoppage of the second compressor train, energy applied to the high-pressure turbine rotor of the operating first compressor train.

5. The compressor system according to claim 1 , wherein
the compression unit comprises:
an inlet flow path connected to the first fluid supply unit and through which the fluid is supplied into the first compressor; and
an inlet valve in the inlet flow path that adjusts the flow rate of the fluid flowing through the inlet flow path, and

the control unit is configured to send, in response to the stoppage of the second compressor train, an instruction to decrease an opening degree of the inlet valve of the compression unit of the operating first compressor train such that the flow rate of the fluid flowing through the inlet flow path is decreased.

Assignees

• Mitsubishi Heavy Ind Compressor Corp
• Mitsubishi Heavy Ind Ltd
• Mitsuibshi Heavy Ind Ltd

Inventors

• Yoneda Keizo
• Hataya Takeshi
• Horii Nobuyuki

Classifications

• F05D2260/606

  Bypassing the fluid · CPC title

• F05D2220/74

  a gas turbine · CPC title

• F05D2220/32

  in gas turbines · CPC title

• F04D27/009

  by bleeding, by passing or recycling fluid · CPC title

• F02C6/00 Primary

  Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use · CPC title