Ceramic heat exchanger design

A heat exchanger connection comprising:

• a) a ceramic receiving wall having an outside face, an inside face and a passage extending from the outside face to the inside face, thereby forming an inside opening and an outside opening;
• said passage comprising:
• i) a first section depending from the inside face and comprising a barrel having a constant diameter,
• ii) a second section having the same diameter as the barrel at its junction therewith tapering outwardly to a larger diameter at its opposite end, and
• iii) a third section having essentially the same diameter as the cone at its junction therewith, said third section being threaded;
• b) a hollow ceramic tube having an outside diameter slightly smaller than the inside opening of the receiving wall;
• c) a channel formed by the difference in the diameters of the tube and the passage;
• d) a threaded ceramic insert having an outside face, a threaded circumference to engage the threaded third section of the receiving wall and an inside face, wherein said threaded insert is screwed into the threaded third section of the receiving wall through the outside opening of the receiving wall;
• e) an annular void defined by the inside face of the threaded insert, the outside diameter of the hollow tube and the section of the passage, said annular void in fluid communication with the channel;
• and
• f) a seal ring providing a sealing engagement between the threaded insert, the hollow tube and the receiving wall, wherein the seal ring is compressed by the threading action of the threaded ceramic insert.