Sintering type zeolite molecular sieve adsorption refrigeration unit tube preparation process

Abstract

The invention designs a preparation process of a sintering type zeolite molecular sieve adsorption refrigeration unit tube, and aims at enhancing the heat conductivity coefficient of the molecular sieve, and reducing the contact thermal resistance between the molecular sieve and a metal wall surface, thereby strengthening the heat transfer of an adsorption bed. The preparation process comprises the molding of the sintering type zeolite molecular sieve and the solidification and combination of the metal wall surface. The first part includes that a zeolite molecular sieve ring is sintered through the steps of raw material disposition, mold unloading, drying in shade and roasting, etc., to accomplish the molding process of the zeolite molecular sieve; the second part includes that a sintering type zeolite molecular sieve unit tube is made through the steps of preparation of an adhesion agent, adhesive bonding of the molecular sieve ring, roasting and drying, to realize the sintering and solidification of the zeolite molecular sieve and the metal wall surface.

Description

Technical field: [0001] The invention relates to a preparation process of a sintered zeolite molecular sieve adsorption refrigeration unit tube, which is one of the researches on strengthening the heat transfer of an adsorption bed and belongs to the field of adsorption refrigeration. Background technique: [0002] Adsorption refrigeration is a new type of refrigeration method that can use low-grade energy as power. It can effectively use a large amount of low-grade waste heat and renewable energy (such as solar energy), use pollution-free refrigerants, and the refrigeration process does not pollute the environment. It is considered It is a green refrigeration method in the 21st century. [0003] However, due to the low thermal conductivity of the adsorbent and the large contact thermal resistance between the adsorbent and the heat exchange wall in the current adsorption refrigeration equipment, the adsorption bed cannot quickly transfer energy to the adsorbent during desorp...

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Problems solved by technology

[0003] However, due to the low thermal conductivity of the adsorbent and the large contact thermal resistance between the adsorbent and the heat exchange wall in the current adsorption refrigeration equipment, the adsorption bed cannot quickly transfer energy to the adsorbent during desorption. , Adsorption heat cannot be quickly discharged during adsorption, so heat transfer and mass transfer are difficult during operation, the adsorption / desorption cycle is long, the refrigeration coefficient COP is relatively low, and the refrigeration power SCP produced by the adsorbent per unit mass is also low. Smaller; with adsorption refrigeration, a simple cycle, the COP- under air-conditioning conditions is generally only 0.2-0.3, and ice-making conditions are generally 0.05-0.15; therefore, the volume of the adsorption refrigeration system must be large and bulky, waste heat The utilization rate is not high, and further promotion is limited

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