Efficient tube shell heat exchange device for preparing steam

The utility model relates to the field of industrial heat exchange systems, in particular to an efficient tube shell heat exchange device for preparing steam, which comprises a shell, a plurality of inlets and outlets are arranged on the shell, and a plurality of tube plates, a plurality of first tube pass tube bundles and a plurality of second tube pass tube bundles are arranged in the shell. The pipeline is divided into a first pipeline and a second pipeline, the first pipeline is formed by arranging heat exchange pipes composed of three concentric circular pipes, water flows in the innermost-layer pipe, refrigerant flows in the middle circular ring space, water flows in the outer-layer circular ring space, in this way, the refrigerant is clamped between the inner-layer water and the outer-layer water, and the heat exchange effect can be greatly improved; a refrigerant enters the second pipeline from the first pipeline; water enters the shell side from the first pipeline, exchanges heat with the refrigerant