The built-in liquid-absorbing core is a multi-pore stainless steel strip, which is wound into a cylindrical shape and then clings to the air wall of the finned tube. When the heat-absorbing core is immersed in liquefied petroleum gas or natural gas liquid, due to the capillary phenomenon of the surface tension of the liquid , the liquid in the liquid film is adsorbed in the narrow gap between the liquid-absorbing core and the inner wall of the finned tube, and the liquid in the liquid film absorbs heat and vaporizes through the finned tube to form tiny bubbles. The small holes on the surface escape, and break away into gas on the liquid surface to reach boiling. After the tiny bubbles leave the liquid-absorbing core, the liquid is replenished into the gap from the small holes on the liquid-absorbing core to form micro-convection heat transfer. The liquid between the guide strips is isolated, avoiding being carried by the latter and leaving the finned tube prematurely, which is conducive to the generation of tiny air bubbles.
The built-in spiral guide changes the flow direction of the liquid. When there is no built-in spiral guide belt, the liquid flow direction is vertical, but after the built-in spiral guide belt, the liquid flow direction is spiral upward, which increases the liquid flow and prolongs the liquid flow. The contact time with the finned tube improves the separation of liquid between the liquid-absorbing core and the spiral guide belt, forming an air flow, which entrains a small part of the liquid droplets, and continuously wets the fin wall above the liquid surface during the rising process , the gas then absorbs a part of the liquid droplets with the same temperature as the updraft and flows downward along the inner wall. After the liquid surface is mixed with the liquid with a slightly lower temperature, the temperature at the liquid surface is increased, the boiling in the finned tube is enhanced, and the In terms of the application of these two technologies, the overall heat transfer performance of the finned tube has been significantly improved. The temperature uniformity of the inner wall of the finned tube has been significantly improved, the heat density has been further increased, the heat transfer coefficient of the finned tube has been significantly improved, and the air temperature has been improved. The heat exchange effect of the warm gasifier ensures the gasification of liquefied LPG and LNG. The gasification section consists of a heat exchange tube with a built-in liquid-absorbing core and a spiral-guided finned tube, and a superheating section with a built-in spiral-guided finned tube (used to increase the temperature of the gas after gasification) ) and the air-temperature vaporizer composed of the main pressure regulating device, the control device for monitoring the liquid-phase pressure regulator, the gas-phase pressure regulating system, the anti-liquid device, and the release pipe, etc., can guarantee a certain volume. gasification capacity.
https://www.chinavaporizer.com/