The high-pressure liquid nitrogen (LN₂) direct-fired vaporizer serves as the core vaporization equipment for high-pressure LN₂ systems (including high-pressure LN₂ fracturing skids). Adopting a direct-fired heating architecture, it enables rapid and efficient vaporization of ultra-low temperature LN₂ medium at -196℃. Equipped with a precision temperature control module and multiple safety protection systems, the device delivers stable output of high-pressure vaporized gas, effectively meeting the high-pressure gas demands of oilfields in applications such as gas lift, fracturing, and purging. Boasting advantages of compact structure, rapid startup, and controllable energy consumption, it stands as a reliable solution for high-pressure LN₂ application scenarios.