COOLING WATER FLOW REGULATING APPARATUS FOR COAL GASIFICATION WELLS

摘要

1. A water flow regulating device feeding from the surface (2) a cooling device (7) of the gases produced by gasification of an underground coal deposit (3), this cooling device (7) being put at the bottom of a recovery well (1) for aforesaid gases and presenting a hole (13) for water inlet that can be sealed off by a throttling device (29) submitted on the one hand to the pressure of the water coming from the surface (2) and on the other hand to the action of an elastic element (19, 22) and to the pressure created by the water coming from the surface (2) admitted in a chamber (14) through a conduit (20) arranged in the throttling device (29), this chamber (14) presenting a hole (15) for regulating by means of a needle (16) the outlet of the water contained in this chamber (14), the throttling device (29) forming the head of an elongated body (23) presenting downstream of this head tapered zones (24) alternating with cylindrical zones (25, 26), this elongated body (23) moving axially in a cylindrical water admission space in the cooling device and the walls (27) of which have narrow parts (28) allowing gradual variations of the passage section of the water admitted in the cooling device.