Continuous vacuum drying roasting method for small crystal grain 5A molecular sieve

Abstract

The invention relates to a continuous vacuum drying roasting method for small crystal grain 5A molecular sieve. The method includes the following steps: (1) filling a feed tank with the 5A molecular sieve material; (2) performing vacuumizing on the feed tank; (3) performing vacuumizing on a vertical disc rotary vacuum roasting furnace; and sucking the 5A molecular sieve into the vertical disc rotary vacuum roasting furnace, and performing heating in sections to obtain a dried roasted and activated 5A molecular sieve; (4) performing vacuumizing on a product bin; (5) opening an automatic controlvalve V of a material inlet II of the product bin, and automatically closing the automatic control valve V after a weighing system of the product bin shows full tank; (6) performing cooling to 50 DEGC in the product bin through a jacket to obtain a product; and (7) discharging the product from the product bin; and at the same time, performing switching to start a spare product bin. The method has precise temperature control, safety and environmental protection, and can realize continuous operation under a high vacuum degree.

Description

technical field [0001] The invention relates to the technical field of novel drying, roasting and activation of materials sensitive to oxygen content and water vapor, in particular to a continuous vacuum drying and roasting method for small-grain 5A molecular sieves. Background technique [0002] The special 5A molecular sieve adsorbent is prepared from small-grained molecular sieves. During the roasting process, the water vapor content in the roasting atmosphere has a great influence on the structure of the molecular sieve. High water vapor content will form a hydrothermal environment inside the furnace and destroy the molecular sieve. The structure affects the performance of the adsorbent. According to many years of research, the method of drying and roasting in a vacuum oven can reduce the decline in the adsorption capacity of the product and increase the adsorption capacity of the product. However, the results of industrial applications show that the roasting method is n...

AI Technical Summary

Problems solved by technology

[0002] The special 5A molecular sieve adsorbent is prepared from small-grained molecular sieves. During the roasting process, the water vapor content in the roasting atmosphere has a great influence on the structure of the molecular sieve. High water vapor content will form a hydrothermal environment inside the furnace and destroy the molecular sieve. structure, which in turn affects the performance of the adsorbent

According to many years of research, the method of drying and roasting in a vacuum oven can reduce the decline in the adsorption capacity of the product and increase the adsorption capacity of the product. However, the results of industrial applications show that the roasting method is not easy to control the temperature in the roasting atmosphere, the quality is low and the production process is easy. Problems such as burn accidents

Images