Vertical vacuum-tight "dry-calcination" method for px spherical adsorbents

Abstract

The invention relates to an upright vacuum sealed type "drying-firing" method for a PX spherical adsorbent. The method comprises the steps of: 1, filling materials in a charging stock tank at room temperature, closing the inlet valve and outlet valve, and vacuumizing an upright disc rotation vacuum roaster; and inhaling a PX spherical adsorbent to be dried and fired into the upright disc rotation vacuum roaster under vacuum conditions; 2, sending the PX spherical adsorbent into a first heating section under vacuum conditions; 3, sending the PX spherical sorbent into a first constant temperature section under vacuum conditions; 4, sending the PX spherical adsorbent into a secondary heating section under vacuum conditions; 5, sending the PX spherical adsorbent into a secondary constant temperature section under vacuum conditions; 6, sending the PX spherical adsorbent into a product hopper and cooling under vacuum conditions, so as to obtain a product and non-condensable gas respectively; and discharging the product from the product hopper; and 7, cooling the non-condensable gas, and sending into a collection tank to obtain condensate and exhaust respectively; discharging the condensate through a condensate discharge pipe; and discharging the exhaust through a vacuum pump. The invention is safe and environment-friendly and can realize continuous operation.

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 vertical vacuum-sealed "drying-calcining" method for PX spherical adsorbents. Background technique [0002] PX spherical adsorbent contains 25% moisture and needs to be dried until the moisture content is below 2%. During the drying and roasting process, since the PX spherical adsorbent is a strong water-absorbing agent and is a water vapor-sensitive material, the evaporated water vapor will affect the adsorbent crystals, thereby affecting the adsorption strength and adsorption capacity of the adsorbent. At the same time, because the activation conditions are relatively harsh on temperature and residence time, the activation time of roasting is different under different temperature conditions. Therefore existing method adopts laboratory box furnace to carry out artificial intermittent operat...

AI Technical Summary

Problems solved by technology

In the process of drying and roasting, since the PX spherical adsorbent is a strong water-absorbing agent and is a water vapor-sensitive material, the evaporated water vapor will affect the adsorbent crystals, thereby affecting the adsorption strength and adsorption capacity of the adsorbent.

At the same time, because the activation conditions are relatively harsh on temperature and residence time, the activation time of roasting is different under different temperature conditions.

Therefore, the existing method uses a laboratory box furnace for manual intermittent operation, which can only be used for small batch production in the laboratory.

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