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AssigneeLinde Aktiengesellschaft
InventorsStefan Lochner, Ralph Spöri, Christian Zimmermann
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A method for obtaining an air product from an air separation plant having a distillation column system and a tank system. The tank system includes a first tank and a second tank. Cryogenic liquid is withdrawn from the distillation column system, stored in the tank system, and used as the air product. The cryogenic liquid is supplied to the first tank and withdrawn from the second tank during a first period, and is supplied to the second tank and withdrawn from the first tank during a second period. The tank system has a third tank to which cryogenic liquid withdrawn from the first tank and the second tank is transferred unheated. The air product is withdrawn from the third tank in liquid state, vaporized and discharged. Alternatively, the cryogenic liquid can be withdrawn from the third tank and stored in the liquid state in a fourth tank.
Method for obtaining an air product using an air separation plant having a distillation column system and a tank system with a first tank and a second tank, in which a cryogenic liquid is withdrawn from the distillation column system, is stored at least in part in the tank system, and is then used at least in part as the air product, wherein the cryogenic liquid is supplied to the first tank and not to the second tank during a first period, and is supplied to the second tank and not to the first tank during a second period, and is withdrawn from the second tank and not from the first tank during the first period, and from the first tank and not from the second tank during the second period, characterized in that the tank system comprises an additional third tank, and in that the cryogenic liquid which is withdrawn from the second tank during the first period, and from the first tank during the second period, is transferred at least partially unheated into the third tank, and in that the air product is provided at least in part by using the cryogenic liquid transferred, unheated, into the third tank, or part of this, wherein the cryogenic liquid from the third tank used for providing the air product is withdrawn from the third tank in the liquid state, is vaporized or converted from the liquid to the supercritical state, and is discharged from the air separation plant, and/or wherein the cryogenic liquid from the third tank used for providing the air product is withdrawn from the third tank in the liquid state and is stored in the liquid state in a fourth tank.
Air separation plant, which is designed for obtaining an air product, having a distillation column system and a tank system with a first tank and a second tank, means which are designed to withdraw a cryogenic liquid from the distillation column system, to store at least part of this liquid in the tank system, and then use at least part of this as the air product, and means which are designed to supply the cryogenic liquid to the first tank and not to the second tank during a first period, and is supplied to the second tank and not to the first tank during a second period, and to withdraw the liquid from the second tank and not from the first tank during the first period, and from the first tank and not from the second tank during the second period, characterized, in that the tank system comprises an additional third tank, and in that there are provided means which are designed to transfer the cryogenic liquid which is withdrawn from the second tank during the first period, and from the first tank during the second period, at least temporarily and at least partially unheated into the third tank, and to provide the air product at least in part by using the cryogenic liquid transferred, unheated, into the third tank, or part of this, wherein there are provided means which are designed to withdraw, from the third tank in the liquid state, the cryogenic liquid from the third tank used for providing the air product, to vaporize or convert this cryogenic liquid from the liquid to the supercritical state, and to discharge it from the air separation plant, and/or which are designed to withdraw, from the third tank in the liquid state, the cryogenic liquid from the third tank used for providing the air product, and to store this in the liquid state in a fourth tank.
Dependencies are inferred from the claim text.