Heat-exchange intensification apparatus and method for indirect medium heating furnace

Abstract

The invention relates to an indirect medium heating furnace heat exchange intensifying device and a method thereof. The device comprises a fuel gas decoupling chamber, an air decoupling chamber, a starting sweeping blower, a thermal acoustic coupling pulsating inflamer, a pressure gauge or a vacuum meter, an exhaust device free from condensing gas, a rigid connecting piece, a coil pipe, a shell and an exhaust smoke pipe, wherein, the thermal acoustic coupling pulsating inflamer is composed of an air check valve, a fuel gas check valve, a fuel gas nozzle, a combustion chamber, a tail pipe and an exhaust decoupling chamber. The method includes: the combustion chamber and a smoke tube adopt a gas pulsation heat exchange mode and eradicates a smoke flow boundary layer in the chamber wall and a smoke tube wall, thus improving heat convection coefficient at the smoke gas side and reducing heat exchange area; the heat exchange between the indirect heat transmission medium (water) and the heated fluid coil plate adopts a stable dropwise condensation heat exchange way realized by mechanical vibration of the pipe coil, thus improving heat convection coefficient of the indirect heat transmission medium (water) and the heated fluid coil plate and reducing heat exchange area.

Description

(1) Technical field [0001] The invention relates to a device and method for enhancing heat exchange of an indirect medium heating furnace, which is mainly used in oil field gathering and transportation projects, and can also be used in the field of boilers and other civil heating devices. (2) Background technology [0002] Oilfield crude oil and natural gas are mostly transported using water jacket furnaces. The characteristics of water jacket furnaces are that the indirect heat transfer medium-water is first heated by combustion and heat release, and then the water transfers the heat to the heated fluid immersed in water. The advantage of this is Avoid the danger of explosion caused by overtemperature and overpressure of the fluid caused by direct flame heating of the fluid, and smoke corrosion. Water jacket furnace is a type of furnace that adopts indirect medium heating. Its main heat exchange elements are combustion chamber, smoke pipe, and heated fluid coil. These heat ...

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Problems solved by technology

[0006] To solve the problem of heat transfer in this link, phase-change heat transfer technology is widely used, but these phase-change heat transfer methods and technical means belong to the range of film condensation heat transfer. The latent heat of vaporization released at the time can only exchange heat with the outer wall of the coil through the liquid film layer, and the film layer becomes the main thermal resistance of condensation heat transfer

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