Method of removing carbonaceous matter from heat exchange tubes

Abstract

Abstract In a heat exchanger having a tube bundle comprising a plurality of inner tubes and a plurality of cooling tubes, each of the inner tubes being arranged within each of the cooling tubes and passed therethrough to provide a double tube structure. The inside of the inner cooling tubes are gas tightly connected to both inlet and outlet chambers for high temperature fluid and the outside of the inner cooling tubes are gas-tightly connected to both inlet and outlet compartments for heat transfer medium as open ends, a high pressure lower temperature fluid is passed through the outside of the outer cooling tubes, a fluid having a high thermal conductivity, for example, molten lead, lead alloy, tin, tin alloy bismuth, sodium, salts of mercury or of sodium in a molten state, is passed through the outside of the inner cooling tubes as the heat transfer medium in ordinary case, and a gas having a low thermal conductivity is passed therethrough as a heat transfer medium when the inner tubes are required to be maintained at a high temperature.

Inventors

• 👤 S Ogawa
• 👤 S Okijama
• 👤 M Sugiyama
• 👤 K Nishiyama
• 👤 I Tokumitsu
• 👤 T Takemura

Bibliographic Details