A helical tube type absorption heat exchanger for district heating

Abstract

The invention discloses a helical tube type absorption heat exchanger for district heating, which belongs to the field of energy saving; it comprises: y independent 2≤y≤10 multilayer helical tube type absorption heat exchange units and y water-water Heat exchanger; the upper condenser and the lower generator are connected through a central cylindrical steam passage, and the upper evaporator and lower absorber are also connected through a cylindrical steam passage arranged inside; the cylinder The steam channel is separated by a complete cylindrical orifice liquid baffle, and the upper and lower ends of the cylindrical orifice liquid baffle are closed; the upper and lower small holes are opened on the cylindrical orifice liquid baffle; the present invention reduces the Due to the processing difficulty, welding workload and production cost of the core components in the absorption heat exchanger, multiple independent absorption heat exchange units, that is, the corresponding water-water plate exchange, are combined through water connection to achieve the purpose of absorption heat exchange. At the same time, multiple sets of independent cooling water pipelines are provided.

Description

technical field [0001] The invention belongs to the technical field of energy saving, in particular to a helical tube type absorption heat exchanger for district heating. Background technique [0002] Lithium bromide absorbers are widely used in heating systems, especially in recent years, a new model of building absorption heat supply based on building absorption heat exchangers has been proposed, which has promoted the miniaturization of absorption heat exchangers and a variety of new processes. development to meet the needs of the heating system, such as the need for district heating of a unit. Building-type absorption heating expects to use one unit to provide independent heating for a building. When the building is tall, district heating is required, for example, it is divided into three districts: high, medium and low. Patent CN202010823236.0 discloses an absorption heat exchanger process that can realize district heating. When the unit provides heat for multiple dist...

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Problems solved by technology

Patent CN202010823236.0 discloses an absorption heat exchanger process that can realize district heating. When the unit supplies heat for multiple districts, the interior will be divided into multiple independent absorption heat exchange units. The scale is already small, and the partitioning further reduces the heat transfer capacity of each absorption heat exchange unit, which makes the unit encounter many practical problems in the process of converting from process to real object, such as the difficulty in processing the internal structure after miniaturization , high cost, reduced space utilization after miniaturization, and vacuum airtightness problems caused by too many welding joints or expansion joints of heat exchange tubes due to the miniaturization of the unit

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