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US 2026/0210371 A1Published application
Multi-stage compressor system with anti-surge arrangement, and method
AssigneeNuovo Pignone Tecnologie Srl
InventorOlaf STALLMANN
Life of this patent
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Abstract
A compressor system includes a low-pressure compressor section and a high-pressure compressor section; an intercooler and an inter-stage liquid-gas separator are arranged between the low-pressure compressor section and the high-pressure compressor section; a master anti-surge line including a master anti-surge valve is arranged in anti-parallel to the low-pressure compressor section and the high-pressure compressor section; and, an interstage anti-surge line including an interstage anti-surge valve is arranged in anti-parallel to the low-pressure compressor section.
Claims19
A compressor system comprising:
- a process gas path having a gas inlet and a gas outlet;
- between the gas inlet and the gas outlet, along the process gas path:
- a low-pressure compressor section having:
- a low-pressure suction side, fluidly coupled to the gas inlet, and a low-pressure discharge side;
- and
- a high-pressure compressor section having:
- a high-pressure suction side;
- and a high-pressure discharge side fluidly coupled to the gas outlet;
- an intercooler, between the low-pressure compressor section and the high-pressure compressor section;
- an interstage liquid/gas separator between the intercooler and the high-pressure compressor section;
- a master anti-surge line having:
- an inlet fluidly coupled to the process gas path downstream of the high-pressure discharge side;
- and an outlet fluidly coupled to the process gas path upstream of the low-pressure suction side;
- wherein a master anti surge valve is arranged in the master anti-surge line;
- an interstage anti-surge line having an inlet fluidly coupled to the process gas path downstream of the low-pressure discharge side and upstream of the high-pressure suction side, and an outlet fluidly coupled to the process gas path upstream of the low pressure suction side;
- wherein an interstage anti-surge valve is arranged in the inter stage anti-surge line;
- wherein:
- the interstage anti-surge valve is functionally connected to an interstage anti-surge controller;
- the master anti-surge valve is functionally connected to a master anti-surge controller;
- and the interstage anti-surge controller and the master anti-surge controller are functionally inter-related such that under some conditions a set point of the interstage anti-surge controller is modified as a function of an operating point of the high-pressure compressor section.
17 more elements
A method for controlling a compressor system comprising:
- a low-pressure compressor section;
- a high-pressure compressor section;
- an intercooler, between the low-pressure compressor section and the high-pressure compressor section;
- an interstage liquid/gas separator between the intercooler and the high-pressure compressor section;
- a master anti-surge line having:
- an inlet fluidly coupled to the process gas path downstream of a high-pressure discharge side of the high pressure compressor section;
- and an outlet fluidly coupled to the process gas path upstream of a low-pressure suction side of the low-pressure compressor section;
- wherein a master anti-surge valve is arranged in the master anti-surge line;
- an interstage anti-surge line having an inlet fluidly coupled to the process gas path downstream of a low-pressure discharge side of the low pressure compressor section and upstream of a high-pressure suction side of the high-pressure compressor section, and an outlet fluidly coupled to the process gas path upstream of the low-pressure suction side;
- wherein an interstage anti-surge valve is arranged in the interstage anti-surge line;
- wherein the method comprises the following steps:
- controlling the master anti-surge valve through a master anti-surge controller;
- controlling the interstage anti-surge valve through an interstage anti-surge con troller;
- adapting a set point of the interstage anti-surge controller as a function of an operating condition of the high-pressure compressor section when a flowrate through the high-pressure compressor section drops below a pre-set value.
11 more elements
A compressor system comprising:
- a plurality of compressor sections placed in sequence along a gas flow path;
- between at least two adjacent compressor sections an intercooler adapted to cause interstage condensation and a liquid/gas separator;
- in anti-parallel to said plurality of compressor sections, a master anti-surge line;
- a master anti-surge valve in said master anti-surge line;
- at least one interstage anti-surge line having an inlet between two sequentially arranged compressor sections and an outlet upstream of the most upstream of said plurality of compressor sections;
- an interstage anti-surge valve in the interstage anti-surge line;
- wherein:
- the interstage anti-surge valve is functionally connected to an interstage anti surge controller;
- the master anti-surge valve is functionally connected to a master anti surge controller;
- and the interstage anti-surge controller and the master anti-surge con troller are functionally inter-related such that under some conditions a set point of the interstage anti-surge controller is modified as a function of an operating point of the most downstream compressor section.
7 more elements
A method for controlling a compressor system comprising:
- a plurality of compressor sections placed in sequence along a gas flow path;
- between at least two adjacent compressor sections an intercooler adapted to cause interstage condensation;
- in anti-parallel to said plurality of compressor sections, a master anti-surge line;
- a master anti-surge valve in said master anti-surge line;
- at least one interstage anti-surge line having an inlet between two sequentially arranged compressor sections and an outlet upstream of the most upstream of said plurality of compressor sections;
- an interstage anti-surge valve in the interstage anti-surge line
- wherein the method comprises the following steps:
- controlling the master anti-surge valve through a master anti-surge controller;
- controlling the interstage anti-surge valve through an interstage anti-surge controller;
- adapting a set point of the interstage anti-surge controller as a function of an operating condition of the most downstream compressor section when a flowrate through the most downstream compressor section drops below a preset value.
7 more elements
Dependencies are inferred from the claim text.