METHOD FOR PRODUCING AT LEAST ONE AIR PRODUCT, AIR SEPARATION SYSTEM, METHOD AND DEVICE FOR PRODUCING ELECTRICAL ENERGY

摘要

A method for producing at least one air product, wherein an air separation system is used which has a primary air compressor, a primary heat exchanger and a distillation column system, and which comprises a first and a second operation mode, wherein, in the first operating mode, at least one liquid air product produced in the distillation column system is saved and, in the second operating mode, the at least one air product saved in the first operating mode and/or at least one additional liquid air product is supplied to the distillation column system.

主权项

1. A method for producing at least one air product, in which an air separation system that has a main air compressor, a main heat exchanger and a distillation column system that comprises a high-pressure column, a medium-pressure column, a low-pressure column, a low-pressure column-sump evaporator and a low-pressure column intermediate evaporator, wherein the high-pressure column is operated at a higher operating pressure than the low-pressure column, the medium-pressure column is operated at an operating pressure which is between the operating pressures of the high-pressure column and the low-pressure column, and the low-pressure column sump evaporator and the low-pressure column intermediate evaporator are constructed as condenser-evaporators,
characterized in that the method comprises a first and second operating mode, wherein
in the first operating mode, at least one liquid air product produced in the distillation column system is stored andin the second operating mode
the at least one liquid air product that is stored in the first mode of operation and/or at least one further liquid air product is fed into the distillation column system andat least one gaseous pressurized stream that is at a temperature level that is below a warm-side temperature of the main heat exchanger is fed to a cold compressor, is compressed in the cold compressor from a first superatmospheric pressure level to a second superatmospheric pressure level, and at the second pressure level is at least in part fed into at least one distillation column of the distillation column system.