Plant and method for low-temperature air separation

A plant for low-temperature air separation, having a rectification column system comprising a high-pressure column, a low-pressure column and an argon column, and a cold box system having a first cold box perimeter and a second cold box, wherein

• the low-pressure column is divided into at least a base section and a top section,
• the base section and the top section of the low-pressure column are arranged next to one another in such a manner that an orthogonal projection of the base section of the low-pressure column onto the horizontal plane does not intersect with an orthogonal projection of the top section of the low-pressure column onto the horizontal plane,
• the high-pressure column is arranged below the base section of the low-pressure column in such a manner that an orthogonal projection of the high-pressure column onto the horizontal plane intersects with the orthogonal projection of the base section of the low-pressure column onto the horizontal plane,
• the high-pressure column together with the base section of the low-pressure column is located in the first cold box and the top section of the low-pressure column is arranged in the second cold box,
• wherein
• the argon column is divided at least into a base section and a top section, wherein the base section and the top section of the argon column are arranged next to one another in such a manner that an orthogonal projection of the base section of the argon column onto the horizontal plane does not intersect with an orthogonal projection of the top section of the argon column, wherein
• the base section of the argon column is arranged in the first cold box, and the top section of the argon column is arranged in the second cold box,
• or the base section of the argon column is arranged in the second cold box and the top section of the argon column is arranged in the first cold box.