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Patent EP0873773A2 successfully refreshed from Google Patents.
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EP0873773A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Vertical evaporator

Assignee: Individual
•
Filing: 1998-04-22
•
Granted: —
•
Expires: 2018-04-22
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Abstract

Abstract A vertical evaporator has an inner tube containing a heat exchanger for heating water and an outer tube which is coaxial with and surrounds the inner tube, forming a sealed system and defining a peripheral space between the two tubes. The inner tube has bottom outlets through which steam and water droplets generated by heating water by the heat exchanger are ejected. A helical fin is attached to the outer surface of the inner tube for centrifugally separating steam and water droplets moving upward inside the peripheral space in a helical manner. The outer tube has a steam outlet at an elevated position for discharging pure steam separated from water droplets, as well as a channel above the helical fin for collecting water droplets which are centrifugally separated from steam. A discharge pipe is also provided, leading to the channel for discharging water collected therein.

Inventors

  • 👤 Haruo Nishi

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 19:01
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/06; B01D1/30; B01D1/305

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 149 words
A vertical evaporator comprising: an inner tube (11) containing a heat exchanger (12) for heating water, said inner tube (11) having bottom outlets (15) through which steam and water droplets generated by heating water by said heat exchanger (12) are ejected; an outer tube (21) surrounding said inner tube, defining peripheral space (42) between said outer tube and said inner tube; means arranged between said inner tube (11) and said outer tube (21) for directing said steam and water droplets upwards through said peripheral space (42) in a helical manner; said outer tube (21) having a steam outlet (22) at an elevated position for discharging pure steam separated from water droplets from said outer tube (21), said outer tube (21) having means for collecting water droplets which are centrifugally separated from steam; and a discharge pipe (15) leading to said means for collecting water for discharging said collected water.
Claim 2
Dependent Claim 28 words
The vertical evaporator of Claim 1 wherein said means for directing said steam and water droplets comprises a helical fin (31) externally attached to said inner tube (11).
Claim 3
Dependent Claim 22 words
The vertical evaporator of Claim 2 wherein said means for collecting water comprises a channel (51) located above said helical fin (31).
Claim 4
Dependent Claim 28 words
The vertical evaporator of Claim 2 or Claim 3 wherein said outer tube (21) has a larger diameter below said helical fin (31) than above said helical fin.
Claim 5
Dependent Claim 61 words
The vertical evaporator of any of Claims 2, 3 or 4 further comprising a member (61) disposed directly below said bottom outlets (15) of said inner tube (11), said member (61) serving to cause steam and water droplets emitted through said bottom outlets (15) to flow upward in a helical manner and in the same direction as said helical fin (31).
Claim 6
Dependent Claim 39 words
The vertical evaporator of any of Claims 2 to 5 further comprising a water-removing member (71) attached to said inner tube (11) below said helical fin (31) for removing water drops on the outer surface of said inner tube.

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