A kind of through-flow condensing heat exchanger and its heat exchanging method

Abstract

The invention provides a tubular condensation heat exchanger and a heat exchange method thereof. The condensation heat exchanger comprises a condenser body, a pipe-in cooling unit and a supercooling unit, wherein the condenser body comprises a tube body unit, a first seal head and a second seal head, the first seal head and the second seal head are arranged on both sides of the tube body, a steam inlet is formed in the first seal head, and the tube body unit comprises a first tube body, a second tube body and a third tube body; the first tube body is separated from the second tube body through a first gas-liquid separator, and the second tube body is separated from the third tube body through a second gas-liquid separator; the pipe-in cooling unit is arranged in the tube body unit, and the supercooling unit is arranged on the second seal head. The tubular condensation heat exchanger disclosed by the invention effectively uses a heat exchange area, quickly drains condensate, avoids the phenomena that the condensate is accumulated and two-phase flows are generated, and obviously increases the heat transfer coefficient.

Description

technical field [0001] The invention relates to thermal equipment in the technical field of efficient energy utilization, and in particular to a cross-flow condensation heat exchanger and a heat exchange method thereof. Background technique [0002] Condensing heat exchanger is a device that converts steam into liquid and takes away heat. It is widely used in chemical industry, refrigeration, petroleum, power and energy and other fields. After entering the condenser, the superheated steam undergoes three processes of cooling, saturated condensation and subcooling, releasing sensible heat and latent heat to achieve the purpose of heat exchange and steam condensation. In order to obtain a condensing heat exchanger with higher heat transfer performance, it should be avoided that the condensate covers the heat transfer surface to form a thick liquid film. [0003] At present, the mainstream enhanced condensation heat transfer technologies mainly include finned tubes, spiral gro...

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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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