Multistage method for dehumidifying liquid

Abstract

This invention relates to a multistage solution dehumidification method characterizing the solution dehumidification is classified into two or more stages, each stage solution circulates independently with different concentration, yet single-way transition exists between stages from high to low density and the most condensed solution stage is supplemented a certain amount of solution from outside and the weak solution stage exhausts a certain amount of solution, then the being processed gas will be dried via stages. This invention utilizes various cooling and gas-liquid contact way flexiblely.

Description

technical field [0001] The invention relates to a multistage liquid dehumidification method, which belongs to the technical field of air conditioning. Background technique [0002] The traditional liquid dehumidification generally has only one stage, and the gas-liquid contact method of countercurrent or cross flow is adopted. figure 1 , attached figure 2 As shown, 1 is the gas to be treated, 2 is the treated gas; 3 is the dilute solution, which flows into the regenerator (not shown in the figure); 4 is the concentrated solution, which comes from the regenerator; 5 is the dehumidification circulating fluid, which is circulated Cooling of the dehumidification liquid may be considered during the process (the cooling liquid and heat exchanger are not shown in the figure); 10 is a counter-current dehumidifier; 20 is a cross-flow dehumidifier. [0003] Since the dehumidification liquid is continuously circulated, its effective solution concentration is on...

AI Technical Summary

Problems solved by technology

[0007] The disadvantages of the first-stage liquid dehumidification are obvious: it cannot form an effective counter-flow heat transfer, let alone use an asymmetric heat transfer (cooling) method to make full use of the natural cold source, and it cannot use different gas for different gas conditions. Liquid mass transfer means and heat transfer (cooling) means

Its dehumidification efficiency is low; the concentration difference of the thick and thin dehumidification solution is small, the solution exchange volume between the regenerator and the dehumidifier is large, and the heat transfer load is large, resulting in a decrease in the efficiency of the regenerator, and it is difficult for the regenerator to achieve multi-stage regeneration

The dehumidifier has a large volume and a large heat and mass transfer area

At the same time, it is not easy to adjust the dryness of the treated air

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