天然ガスから都市ガスへの熱量調整技術

抄録

City gas, which is mainly made from natural gas, has been widely recognized as clean fuel, and its demand is getting higher year by year in Japan. The natural gas is imported in the form of LNG from varied countries. The calorific value of the imported natural gas is usually lower than the Japanese city gas, therefore, gas companies adjust the calorific value of send-out city gas to the regulated value by adding LPG to the natural gas during the process of city gas production. We have developed a new, state-of-the-art, calorific value adjusting system, which operates in wide flow-rate range, more than four (4) times wider than a conventional system does. We report the outline of the newly developed system and its performance confirmed through a pilot-scale test, along with a short description of a typical process of city gas production and conventional methods of calorific value adjustment.