Multistage plate-type evaporation-absorption type refrigerating device and method

Abstract

The invention relates to a multistage plate-type evaporation-absorption type refrigerating device and method. The mode that an original generator and an original condenser of an absorption-type refrigerating unit conduct concentrating on a dilute solution to generate refrigerant water vapor, and then condensation is conducted is changed, multiple sets of plate-type evaporation units are combined to continuously evaporate and concentrate the dilute solution, condensation latent heat of the refrigerant water vapor produced in the evaporation process of the dilute solution is fully recycled and utilized to be made into regenerated vapor, the pressure and the temperature of the regenerated vapor are increased in the mode of mechanical vapor recompression, and therefore the regenerated vapor can replace originally input fresh vapor to serve as a heat source to be used; the energy efficiency ratio is greatly increased, and COP reaches 5-6; meanwhile, due to the fact that the emission of condensation heat does not exist, the cooling water consumption is reduced by 50%; multiple preposed effects of the multistage evaporation units mainly act on the continuous concentration of the dilute solution.

Description

[Technical Field] [0001] The invention relates to a waste heat recovery device and method, in particular to a multi-stage plate type evaporative absorption refrigeration device and method. [Background technique] [0002] The traditional absorption refrigeration method has a production history of nearly a hundred years, using basic thermodynamic processes and equipment; in actual use, the most commonly used are the lithium bromide absorption refrigeration cycle for air conditioning and ammonia for refrigeration and air conditioning. Absorption refrigeration cycle. In recent decades, due to the impact of the "Montreal Agreement" regulations, reducing the use of fluorocarbons, and the use of waste heat as a driving heat source to reduce carbon emissions, absorption refrigeration methods have been greatly promoted and developed, such as China Patent CN200510060377.7 "Multi-energy-driven lithium bromide refrigerating air conditioning device" patent uses solar energy, microwave and fu...

AI Technical Summary

Problems solved by technology

[0004] The important reason for the high cost of absorption refrigeration and air conditioning cycles is that traditionally, shell-and-tube heat exchange equipment and spray mass transfer methods are mostly used, with low heat and mass transfer coefficients and large heat exchange areas. Leach absorbing solution and refrigerant, and in Chinese patent CN200480010361.9 "Absorber and heat exchanger with external loop and heat pump system and air conditioning system including the absorber or heat exchanger" use plate heat exchanger as absorber or Condenser to improve heat exchange efficiency, including the US patent US6176101 B1 "FLAT-PLATE ABSORBERS AND EVAPORATORS FOR ABSORPTION COOLERS" which assembles the condenser and the absorber in a plate heat exchanger, this equipment provides the recovery of condensation heat Possibly, but the patent does not propose a solution to improve the energy efficiency ratio of the absorption refrigeration method and reduce the system cost

Images