Abstract
Within the model of adsorption unit with a fluidized bed of silica gel the necessary weight to place it inside the aggregates of TPP water vapor path was determined. Fluidized mode is efficient due to the developed mass transfer surface. On the other hand, it is power-consuming and more complex in structure than the embodiment proposed by the authors with car-tridges filled with silica gel. At the same time the adsorbers size will increase, but it is simplifies and reduces the cost of construction due to the desorption stage rejection.
Highlights
Within the model of adsorption unit with a fluidized bed of silica gel the necessary weight to place it inside the aggregates of TPP water vapor path was determined
Fluidized mode is efficient due to the developed mass transfer surface. It is power-consuming and more complex in structure than the embodiment proposed by the authors with car-tridges filled with silica gel
Silica gels moisture saturation process under static conditions is characterized by a low speed
Summary
One of the main characteristics of an adsorbent is its dynamic activity. It is known that the value of this parameter by water vapor in the zeolite is about 1.5 times greater than for silica gel [2], so the estimations can be used physic-chemical characteristics of zeolites better reported in the literature. Practical purpose of the adsorption process calculating is to determine the concentration of the target component in the carrier gas at the outlet from the adsorbent bed. In the apparatus operation with the adsorbent fluidized bed (FB) a significant mixing of the particulate material adjustment layer having a value of 60 . It is assumed that complete adsorbent mixing is carried out, which corresponds to a constant value of the average mining degree throughout the volume of the adsorbent layer. Where amd , an – average mining degree of dispersed adsorbent in the FB volume and at the outlet thereof; Wc, Wa– consumption of carrier gas and adsorbent; F – total surface area of the particles in the bulk layer. Where da – the adsorbent particle diameter; Cmx – the limiting concentration of the target component in the adsorbent; Dw and C0 – diffusion coefficient and the initial concentration of the adsorbate vapor in the air
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