Deep dehumidification system driven by cascade heat pump and application

Abstract

The invention relates to a deep dehumidification system driven by a cascade heat pump and application. The system comprises the cascade heat pump with a low-temperature refrigeration cycle and a high-temperature refrigeration cycle, a first-stage dehumidification rotating wheel and a second-stage dehumidification rotating wheel. Wet air is condensed and dehumidified through the cold end of the cascade heat pump and then enters a dehumidification area of the first-stage dehumidification rotating wheel from an outlet of the cold end to be subjected to primary adsorption dehumidification, and after primary adsorption dehumidification, the wet air is discharged from an outlet of the dehumidification area of the first-stage dehumidification rotating wheel or enters a dehumidification area of the second-stage dehumidification rotating wheel to achieve secondary adsorption dehumidification according to the dehumidification requirement; regeneration air is heated by the hot end of the cascade heat pump, flows out of an outlet of the hot end and then enters the regeneration area of the first-stage dehumidification rotating wheel and the regeneration area of the second-stage dehumidification rotating wheel respectively or only enters the regeneration area of the first-stage dehumidification rotating wheel according to regeneration requirements, so that the regeneration of the moisture absorbent is realized. The stage number of adsorption dehumidification of the rotating wheel can be adjusted according to different working conditions, and the deep dehumidification requirement of air in different humidity ranges is met.

Description

technical field [0001] The invention relates to the technical field of deep dehumidification, in particular to a deep dehumidification system driven by a cascade heat pump and its application. Background technique [0002] Heat pump technology is a kind of upgrading technology that upgrades low-quality heat source to high-quality. Its working principle is to transfer heat from low temperature to medium high temperature through reverse Carnot cycle, which has obvious energy saving effect. The research on heat pump mostly focuses on the single-stage heat pump technology, and its technical feature is that the improvement of energy quality is not large, so the scope of use is also limited. [0003] According to the principle of dehumidification, air dehumidification can be divided into condensation, adsorption, infiltration, etc. Condensation dehumidification refers to the use of an evaporator to cool the air below the dew point to form saturated air for dehumidification. Adso...

AI Technical Summary

Problems solved by technology

The rotary dehumidification technology has the characteristics of large dehumidification capacity and non-corrosiveness, but the disadvantages of the rotary dehumidification technology are: limited dehumidification range, unable to fully meet the requirements of deep dehumidification; due to the high quality of the required regenerative heat source, the regenerative energy consumption large, economical

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