A subcooling condensation heat exchanger and heat exchanging method thereof

Abstract

The invention provides an undercooling type condensation heat exchanger and a heat exchange method thereof. The condensation heat exchanger comprises a condenser body, an in-tube cooling unit and an undercooling unit. The condenser body comprises a cylinder unit, a first end enclosure and a second end enclosure, and the first end enclosure and the second end enclosure are arranged on two sides of the cylinder unit respectively. The first end enclosure is provided with a steam inlet and a steam outlet. The cylinder unit comprises a first cylinder and a second cylinder which are separated from each other through a gas-liquid separator. A separation plate is arranged in the first end enclosure, the in-tube cooling unit is arranged in the cylinder unit, and the undercooling unit is arranged in the second end enclosure. A steam heat exchange process in heat exchange tubes is divided into two processes in the two cylinders by the separation plate, and flow velocity of steam in each process is kept uniform basically; through heat exchange of the undercooling unit and the in-tube cooling unit, reliability in heat exchange is guaranteed, and application range of the condensation heat exchanger is widened.

Description

Technical field [0001] The invention relates to thermal engineering equipment of energy efficient utilization technology, in particular to a supercooled condensing heat exchanger and a heat exchange method thereof. Background technique [0002] The condensing heat exchanger is a cooling device that takes away heat by converting steam into a liquid state. It is widely used in chemical, refrigeration, petroleum, power and energy fields. After entering the condensing heat exchanger, the superheated steam undergoes three processes of cooling, saturated condensation and subcooling, and achieves the purpose of heat exchange by releasing sensible heat and latent heat. Studies have shown that the thermal resistance of condensation heat transfer is mainly on the surface of the condensed liquid film, so the goal of improving condensation heat transfer is to accelerate the drainage of condensate and reduce the thickness of the condensate film. [0003] The current mainstream enhanced condens...

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Problems solved by technology

[0003] At present, the mainstream enhanced condensation heat transfer technologies mainly include finned tubes, spiral grooved tubes, and inner spiral finned tubes. Although the above enhanced tube technologies can improve the condensation heat transfer coefficient of the Problems such as the increase of condensation resistance caused by the accumulation of condensate and the underutilization of the heat exchange area in the downstream part need to be solved urgently

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