Suspension type heat exchanger

A suspension type heat exchanger including means for separating solid particulate matter from a gas stream in which said particulate particularte matter is suspended comprising:

• an essentially unobstructed separating chamber defined by stationary walls in the form of a cylinder having a substantially horizontal center axis and being axially elongated;
• a collecting chamber located beneath said separating chamber, the collecting chamber and the separating chamber being in unobstructed direct communication with each other;
• and
• an inlet duct and an outlet duct each connected to a wall of the separating chamber and each duct communicating with the separating chamber at a location substantially spaced from the location of the other duct along the length of the chamber, the inlet duct and the outlet duct each being oriented non-radially with respect to the axis of the separating chamber and transverse to said axis;
• said inlet duct comprising means for introducing into the separating chamber a linearly flowing gas stream in which is suspended solid particulate matter, the orientation of the inlet duct relative to the separating chamber is such as to cause said gas stream to flow spirally about the axis of the separating chamber to the outlet duct, centrifugal force caused by said spiral flow propels the particulate matter outwardly away from the spiral flow thereby allowing the particulate matter to drop into the collecting chamber while the gas stream continues to flow to the outlet duct through which it flows linearly, the separation of the particulate matter from the gas thereby being efficient, the pressure loss in the separating chamber being low and the height of the particulate matter separating means being relatively small due to the horizontal orientation of the separating chamber axis.