Simultaneously provide two channels of hot water with lithium bromide absorption heat exchange system with supplementary combustion

Abstract

The invention provides an afterburning-type lithium bromide absorption heat exchange system capable of simultaneously providing two loops of hot water. The afterburning-type lithium bromide absorption heat exchange system capable of simultaneously providing two loops of hot water comprises a primary network hot water pipeline system (1), a first-loop secondary network hot water pipeline system (2), a second-loop secondary network hot water pipeline system (3), a first heat exchanger (4), a second heat exchanger (5), a hot-water-type lithium bromide absorption unit (6) and a direct-burning-type lithium bromide absorption unit (7), wherein primary network hot water which flows out of the primary network hot water pipeline system (1) firstly enters a generator (604), comes out, enters the first heat exchanger (4), then enters the second heat exchanger (5) and finally flows out through the primary network hot water pipeline system (1); all or part of hot water return water which flows out of the second-loop secondary network hot water pipeline system (3) flows through an evaporator (601) of the hot-water-type lithium bromide absorption unit (6) and an evaporator (701) of the direct-burning-type lithium bromide absorption unit (7) and then enters the second heat exchanger (5). The afterburning-type lithium bromide absorption heat exchange system capable of simultaneously providing two loops of hot water has the advantage that under the situation that primary network hot water return water temperature is reduced, the peak heat supply load of a centralized heat supply system can be borne.

Description

technical field [0001] The invention relates to a lithium bromide absorption heat exchange system with supplementary combustion capable of providing two channels of hot water at the same time. It belongs to the technical field of air conditioning equipment. Background technique [0002] In the conventional central heating system, after the hot water of the primary network is heated at the heat source, it is sent to each heat user through the heating pipe network, and after the heat exchange and cooling of the hot water of the secondary network at each heat user place through the heat exchanger, it is then Return to the heat source through the heating pipe network to heat up. [0003] Common heat exchangers used at various heat users such as figure 1 As shown (water-water heat exchanger in the figure), the hot water of the primary net and the hot water of the secondary net are exchanged through heat exchange tubes (shell-and-tube heat exchangers) or heat exchange surfaces (...

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Problems solved by technology

[0005] In addition, because the central heating system needs to meet the heating demand in the coldest weather, the heating pipe network is designed and constructed according to the maximum heating load, but most of the time in the actual operation of the heating system is Operate under part of the heating load, which causes a waste of heating capacity of the heating pipe network

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