Ammonia and lithium bromide integrated absorption refrigeration device driven by heating medium water and method

An absorption refrigeration and lithium bromide technology, which is applied in refrigerators, refrigeration components, adsorption machines, etc., can solve the problems of high refrigeration cost and complicated refrigeration process, to ensure the condensation effect, reduce the temperature of the heat source, and solve the difficult recovery of waste heat Effect

CN103629854AActive Publication Date: 2014-03-12DALIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-03-12

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Abstract

Provided are an ammonia and lithium bromide integrated absorption refrigeration device driven by heating medium water and a method. The device comprises an ammonia-water solution rectifying tower, an ammonia condenser, a liquid ammonia throttling valve, a liquid ammonia evaporator, a refrigerant ammonia absorber, an ammonia-water solution heat exchanger, an ammonia-water solution circulating pump, an ammonia-water solution reducing valve, a lithium bromide solution generator, a water vapor condenser, a water throttling valve, a water evaporator, a refrigerant water vapor absorber, a lithium bromide solution heat exchanger, a lithium bromide solution circulating pump and a lithium bromide solution reducing valve. An ammonia absorption refrigeration system and a lithium bromide absorption refrigeration system are integrated through heating medium water and chilled water energy flows. The process includes the steps that according to an energy gradient utilization principle, the heating medium water drives ammonia absorption refrigeration at first and then sequentially drives lithium bromide absorption refrigeration. Chilled water made through the lithium bromide absorption refrigeration system is used for cooling the generator (an ammonia-water solution rectifying overhead condenser) and the absorber of the ammonia absorption refrigeration system in a series level mode, and therefore the ammonia absorption refrigeration process is intensified.
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Description

technical field

[0001] The invention provides a method widely used in petrochemical and coking production. The waste heat recovery of heat medium water is used in the refrigeration process. It relates to an integrated device of ammonia absorption refrigeration and lithium bromide absorption refrigeration. Medium-low temperature refrigerant. Specifically, the lithium bromide absorption refrigeration system is used as an auxiliary to strengthen the ammonia absorption refrigeration process, thereby reducing the temperature of the ammonia absorption refrigeration heat source, reducing the overall refrigeration cost, and realizing the recovery of low-temperature heat medium water waste heat. Background technique

[0002] On the one hand, there are a large number of low-temperature heat sinks with a temperature range of -30 to 19°C in petrochemical ketone-benzene dewaxing and coking clean gas final cooling and other joint production units, and ammonia or lithium bromide refrigerat...

Examples

Embodiment Construction

[0025] The specific implementation manner of the present invention will be described in detail below in combination with the technical scheme and accompanying drawings.

[0026] Such as figure 1As shown, the top of the ammonia solution rectifying tower 1 is connected to the ammonia condenser 2, and the ammonia enters the refrigerant ammonia absorber 5 after passing through the ammonia condenser 2, the liquid ammonia throttle valve 3, and the liquid ammonia evaporator 4 successively; The bottom of the ammonia solution rectification tower 1 is connected with the ammonia solution heat exchanger 7, and the dilute ammonia solution enters the refrigerant ammonia absorber 5 to absorb the refrigerant ammonia after passing through the ammonia solution heat exchanger 7 and the ammonia solution pressure reducing valve 8 successively, The concentrated ammonia solution at the outlet of the absorber 5 passes through the ammonia solution circulation pump 6 and the ammonia solution heat excha...