Plate type coupling low-temperature flue gas waste heat recovery device for heating raw water

Abstract

The invention discloses a plate type coupling low-temperature flue gas waste heat recovery device for heating raw water. The device comprises a waste heat recovery unit, a raw water heating unit and connecting pipelines. A closed circulation circuit of phase-change working media in the waste heat recovery unit and the raw water heating unit is formed through the connecting pipelines; the waste heat recovery unit comprises a finned heat pipe exchanger, phase-change working medium flow channels are arranged in finned pipes, and a flue gas flow channel is arranged outside the finned pipes; and the raw water heating unit consists of a plate type steam-water condenser, a steam-water separating steam pocket is arranged on the connecting pipelines between the waste heat recovery unit and the raw water heating unit, and a cold water inlet pipe and a steam outlet pipe of the finned heat pipe exchanger and a steam inlet pipe and a cold water outlet pipe of the plate type steam-water condenser are communicated with the inside of the steam and water separating steam pocket. The waste heat recovery device is compact in structure, high in heat exchange efficiency and working stability and large in effective heat exchange area.

Description

technical field [0001] The invention relates to a flue gas waste heat recovery device, in particular to a flue gas waste heat recovery device for heating raw water. Background technique [0002] Heat exchanger is one of the most important equipment in industrial production. It is widely used in heating, chemical, petroleum, steel and electric power industries. Heat exchange equipment plays an important role in reducing power consumption, heat consumption and other energy consumption of industrial enterprises in industrial production equipment. With the rapid development of industry, the demand for heat exchangers is increasing, and the heat transfer performance requirements such as heat transfer coefficient, temperature and pressure bearing capacity, and resistance loss are also getting higher and higher. In the process of implementing energy saving in the industrial industry, reducing fuel consumption and reducing greenhouse gas emissions are problems that enterprises need ...

AI Technical Summary

Problems solved by technology

When this heat exchange device is working, the combustion conditions of the boiler directly lead to instantaneous changes in the pressure and temperature in the heat exchanger. Therefore, in order to improve the adaptability of the heat exchanger to pressure and temperature fluctuations, tube heat exchangers are usually used. As the heat exchanger of the condensing unit, due to the limitation of the structure of the tube heat exchanger itself, the heat exchange device is bulky, the effective heat exchange area is small, and the heat exchange efficiency is low.

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