Horizontal combined phase change heat exchanger

Abstract

The invention discloses a horizontal combined phase change heat exchanger and aims to provide a horizontal combined phase change heat exchanger which can not cause acid dew point corrosion easily and occupies small space and has high heat exchange efficiency. The horizontal combined phase change heat exchanger comprises heat exchange units arranged in a multi-layer and multi-row manner, wherein aheat-absorbing medium input device and a heat-absorbing medium output device are respectively arranged at two ends of each heat exchange unit; each heat exchange unit comprises a heat exchange inner pipe (12) and a heat exchange outer pipe (11), wherein the heat exchange outer pipe (11) is sleeved outside the heat exchange inner pipe (12) and two ends of the heat exchange outer pipe (11) are sealed; an upper communicating pipe (15) and a lower communicating pipe (16) are respectively arranged at the upper part and the lower part of each heat exchange outer pipe (11); the upper communicating pipe (15) of the heat exchange outer pipe (11) of the heat exchange unit at the first layer is connected with an upper communicating horizontal pipe (151); the lower communicating pipe (16) of the heatexchange outer pipe (11) of the heat exchange unit at the bottom layer is connected with a lower communicating horizontal pipe (161); and two ends of each heat exchange inner pipe (12) are respectively connected with each heat-absorbing medium input device and each heat-absorbing medium output device. The invention is applied to the field of heat exchangers.

Description

technical field [0001] The invention relates to a heat recovery device, in particular to a horizontally combined phase-change heat exchanger. Background technique [0002] As we all know, combustion boilers are widely used in industry. Part of the heat generated by boiler combustion will be discharged into flue gas, resulting in energy loss. In order to avoid energy loss in vain, heat exchange devices installed at the tail of the boiler have successively appeared on the market. (or heat recovery device), the current common heat exchange devices include air preheater, low-pressure economizer, etc., which are used to recover the heat lost with flue gas during boiler combustion, but the existing conventional heat exchange devices are often used due to metal The temperature of the wall surface is lower than the acid dew point of the flue gas, so acid dew corrosion often occurs, resulting in equipment damage and short service life. In order to avoid such phenomena, people often i...

AI Technical Summary

Problems solved by technology

To sum up, the existing phase change heat exchangers have the technical defects of being prone to acid dew corrosion, bulky, and low heat transfer efficiency.

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