Abstract: Disclosed is a method and apparatus for adjusting heating value of natural gas, wherein components having high heating value are separated from natural gas consisting of various hydrocarbon components to reduce heating value of natural gas supplied to the markets. The method includes heating liquefied natural gas (LNG), separating the LNG heated and partially gasified into a gaseous component having low heating value and a liquid component having high heating value.

Abstract: Disclosed is an electric wax chisel. A main body having a shape of hollow cylinder includes a tank provided inside the hollow cylinder. The tank contains wax. A chisel tip having a hole is installed at one end of the main body. A heating member is disposed in the outer face of the tank. A control box is electrically connected with the main body by an electric wire. The main body comprises a first chamber and a second chamber. The first chamber has an exit hole at one end, in which the chisel tip is mounted, and an inlet hole at the other end. The second chamber has a discharging hole correspond to the inlet hole, and a tank to contain a wax. A terminal for supplying an electric power is disposed in the second chamber. A cap for sealing the second chamber is provided. The cap has a space depressed inwardly along the tube axis. Therefore, the electric wax chisel is improved so as to use easily and conveniently.