Novel LNG gasifier

A novel LNG vaporizer comprises a vaporizer steel frame, an aluminum finned tube set, an LNG main liquid inlet tube, a natural gas phase header tube, a main water inlet tube and a main water outlet tube, the aluminum finned tube set is vertically and fixedly installed in the vaporizer steel frame and composed of a plurality of aluminum finned tubes, inlets of the aluminum finned tubes are connected with the LNG main liquid inlet tube, and outlets of the aluminum finned tubes are connected with the LNG main liquid inlet tube. An outlet of each aluminum finned tube is connected with a natural gas phase header pipe, every four vertical sections of every two adjacent aluminum finned tubes in a rectangular array form a group, steel tubes are vertically arranged among the four vertical sections of each group, the lower end of each steel tube is connected with a header water inlet pipe in parallel, and the lower end of each steel tube is connected with a water outlet of the header water inlet pipe in parallel. The u