Large-temperature-difference heat exchange method and large-temperature-difference heat exchange device

Abstract

The present invention provides a large temperature difference heat exchange method and a large temperature difference heat exchange device capable of reducing the return water temperature of the heating network. Its working process is: (1) the high-temperature hot water for heating from the heating network enters the high-temperature evaporator The device releases heat, so that the high-temperature circulating water in it is heated and evaporated to produce high-temperature water vapor to flow out, and the high-temperature water vapor enters the steam injector as driving steam; (2) The incoming water from the heating network flows out from the high-temperature evaporator device and enters the heating heat exchanger to release heat , used for heating; (3) The incoming water from the heating network flows out from the heating heat exchanger, enters the low-temperature evaporator device to release heat, and the low-temperature circulating water is heated and evaporated to produce low-temperature steam to flow out; The return water pipe of the heating network; (4) The low-temperature water vapor generated by the heating and evaporation of the low-temperature circulating water in the low-temperature evaporator device is injected into the absorption chamber of the steam ejector, and the two are mixed into the diffuser tube of the ejector, and then enter To the condensing heat exchanger to release heat for heating.

Description

technical field [0001] The invention relates to thermal technology, in particular to a large temperature difference heat exchange method and a large temperature difference heat exchange device. Background technique [0002] In recent years, with the continuous development of my country's urban construction, the contradiction between regional development and heating demand has become increasingly prominent. The urban area of ​​all cities is constantly expanding, the large-scale residential areas in the main urban area are constantly increasing, the area of ​​the old urban area is greatly increased every year, and the area of ​​the new urban area is also expanding. Judging from the current heat source and heating network heating capacity of the city, it is far from meeting the needs of the city's rapid development. If the heat supply cannot keep up, it will cause a bottleneck in urban development. [0003] In order to solve this contradiction concerning urban development and...

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Problems solved by technology

[0013] Aiming at newly building or renovating the old heating pipe network and solving the problem of insufficient heat supply generally existing in the heating pipe network, the present invention provides a method that can reduce the return water temperature of the heating network, thereby increasing the heat supply of the heating pipe network. Large temperature difference heat transfer method and large temperature difference heat transfer device

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