F - Mech Eng,Light,Heat,Weapons – 22 – B
Patent
F - Mech Eng,Light,Heat,Weapons
22
B
122/36
F22B 21/30 (2006.01) F22B 1/02 (2006.01)
Patent
CA 1105787
ABSTRACT The invention relates to a steam generator comprising an enclosure with a vertical axis containing a bundle of U tubes the ends of which are connected, respectively, via a horizontal tube plate extending trans- versely in the enclosure, to an inlet collector and an outlet collector for a primary fluid circulating in -these tubes, which are bathed on the outside by a secondary fluid taken into the enclosure is liquid form and extracted therefrom in vapour form, a heater in which the secondary fluid is brought to its boiling temperature located near the tube plate in the region of the tubes, this tube plate being connected to the outlet collector, and an inner casing surrounding the bundle of tubes and surmounted, at its upper end above this bundle, by separating devices for separating the liquid phase carried by the vapour phase, whilst the separated liquid phase is passed into an annular chamber provided be- tween the casing and the enclosure so that this liquid phase comes into contact with the tube plates and the overall recirculation in the steam generator is assisted by ejector pumps with nozzles activated by the secondary fluid as it enters the enclosure, wherein the lower part of the annular chamber adjacent to the heater is isolated by means of partitions from the remaining volume of this annular chamber, and wherein the inner casing comprises, at right angles to the upper end of the heater, at least one communication passage to the lower part of the annular cham- ber for recycling the majority of the flow of secondary fluid in liquid form as it leaves this heater, and wherein this heater also comprises another passage through which the remaining flow passes towards the separating devices after passing through the bundle of tubes.
305347
Chaix Jean E.
Fajeau Maurice
Commissariat A. L'energie Atomique
Goudreau Gage & Associates
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