| 摘要 |
A multiple effect evaporator (11) consists of a stack (13) made up of a number of effects (#1, #2, ...) each effect (15) in turn being made up of a plurality of horizontally disposed trays arranged in the form of stacked plates to form a heat exchanger. There is a plurality (A, B) of discrete group of effects having the same number of effects in each group. These groups (A, B) are physically interleaved and aligned in a sequential manner such that the first effect (#1A, #1B) of each of the groups is disposed in sequence, followed by the second effect (#2A, #2B) of each group, and so on until the last effect (#4A, #4B). Float valves (23) and v apour traps (25) are accommodated in the unused fluid passageways of another group of effects, providing for a compact arrangement. The trays are essentially square in plan and comprise three circular apertures at three of the four corners thereof and four substantially rectangular apertures along each of the sides thereof.
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