Patent ID: 8186423
Filing Date: 2012-05-29
Classification: B01J,F28D,F28F

Abstract:
1. An apparatus for cooling a hot gaseous medium comprising: a vessel, wherein a bundle of a number of pipes is disposed in a coolant medium compartment and wherein, in use, a liquid coolant medium flows around the pipe bundle; (i) said pipes being mounted at least at or near their upstream ends in a thermal shield; (ii) said pipes further extend through openings in a support plate mounted at a distance from the thermal shield defining a front space between the thermal shield and the support plate in the vessel separated from the coolant medium compartment; (iii) means for adding liquid coolant to the front space; (iv) the openings in the support plate are larger than the pipes defining an annular space between pipe and support plate, which annular space fluidly connects the front space with the coolant medium compartment such that, in use, liquid coolant can flow co-current with the hot gaseous medium in the pipes from the front space to the coolant medium compartment; (v) wherein a skirt type extension is present around the pipe in the front space fixed to the support plate and having an opening at the thermal shield and wherein the inlet opening of the pipes at the thermal shield are conical shaped and wherein the skirt type extension extends between 30% and 70% of the length d along the conical shaped inlet part as measured from the point in the tube where the conical part starts to expand in diameter and wherein the length d represents the total length of the conical part as measured along the surface of the tube and in the direction of the gas flow.