Fume hot-water single-double effect compound type lithium bromide absorption type cold water and cold-hot water unit

Abstract

The invention relates to a fume hot-water single-double effect compound type lithium bromide absorption type cold water and cold-hot water unit which comprises a high pressure generator (7), an evaporator (22), an absorber (1), a low pressure generator, a condenser (21), a solution heat exchanger, a solution pump and a cryogenic fluid pump (24), wherein the low pressure generator comprises a hot-water generator (15) and a vapour generator (17); a hot-water heat exchange tube bundle (18) and a vapour heat exchange tube bundle (19) are arranged in a same cylinder body (20), and a splitter plate(16) is arranged between the hot-water heat exchange tube bundle (18) and the vapour heat exchange tube bundle (19); the solution heat exchanger comprises a high-temperature heat exchanger (6), a low-temperature heat exchanger (4) and a single-effect solution heat exchanger (5); the solution pump comprises a single-effect solution pump (23) and a double-effect solution pump (25), and the single-effect solution pump (23) and the single-effect solution heat exchanger (5) are arranged on a connecting pipeline positioned between the absorber (1) and the hot-water generator (15) to form a single-effect solution circulation process system. The hot-water direct-fired single-double effect compound type lithium bromide absorption type cold water and cold-hot water unit enables the single-effect solution circulating load and the double-effect solution circulating load to be nicely matched with heating load.

Description

(1) Technical field [0001] The invention relates to a lithium bromide absorption type cold water and hot and cold water unit. It belongs to the technical field of air conditioning equipment. (2) Background technology [0002] The previous flue gas type lithium bromide absorption chiller and hot water unit such as figure 1 As shown, the unit consists of a flue gas type high-pressure generator 7, an evaporator 22, an absorber 1, a low-pressure generator 29, a condenser 21, a high-temperature heat exchanger 6, a low-temperature heat exchanger 4, and a control system (not shown in the figure) Out) and the pipelines and valves connecting the various components. The flue gas type lithium bromide absorption chiller can only be driven by the residual heat of the flue gas discharged from the external device. [0003] In the past, flue gas hot water type lithium bromide absorption cold and hot water units such as figure 2 , image 3 As shown, there is a dilute solution communica...

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Problems solved by technology

[0004] 1. Since the pressure of the high-pressure generator changes greatly with the high-heating load, and the opening of the solution switching valve 3 remains unchanged, when the unit is heated by flue gas waste heat (and supplementary combustion heat) and hot water heat at the same time, it is difficult to Achieving a good match between the dilute solution volume distribution and heating load entering the composite low-pressure generator and entering the high-pressure generator;

[0005] 2. When the unit is heated by hot water heat alone, part of the dilute solution will enter the high-pressure generator, and flow back to the absorber through the intermediate solution liquid distribution pipe 36, steam heat exchange tube bundle 19 and low emission liquid pipe 31, forming a useless cycle. Even enter the condenser 21 through the refrigerant steam pipe 12, causing refrigerant water pollution

therefore, figure 2 , image 3 The unit cannot be used for hot water heating alone

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