A catalyst continuous impregnation device

Abstract

The invention relates to a catalyst continuous impregnation device, comprising: an impregnation chamber (4), in which a catalyst carrier and an impregnation liquid are impregnated and mixed; Mixing; intermediate buffer unit (6) for short-term storage of the catalyst from the mixing unit (5); delivery unit (7) for receiving the catalyst in the intermediate buffer unit (6) and delivering it to the subsequent Drying takes place in a dryer (9) in which the catalyst does not move relative to each other in the conveying means (7) and a dryer (9) for drying the catalyst fed through the conveying means (7). The catalyst continuous impregnation device provided by the invention can realize continuous impregnation of the catalyst, realize impregnation and mixing at room temperature during the impregnation process, transport the catalyst carrier without relative movement and wear, reduce fouling phenomenon during the impregnation process, and improve catalyst forming rate.

Description

technical field [0001] The invention relates to the field of catalyst processing, in particular to a catalyst continuous impregnation device. Background technique [0002] In the catalyst preparation process, impregnation is an indispensable process. The purpose of the impregnation process is to impregnate the catalytically active component on the catalyst carrier, so that it is evenly distributed on the surface of the carrier, and then prepare the catalyst product by drying and roasting the carrier with the catalytically active component. [0003] For example, for the treatment of automobile exhaust emissions of HC, CO and NO x The three-way catalytic converter, the preparation process is to make a honeycomb alumina carrier first, and then impregnate the active metal components such as Pd, Pt, Rh on the alumina carrier to prepare a catalyst, which can convert automobile exhaust for H 2 O.CO 2 , N 2 ; Another example is that ammonium polyvanadate is impregnated on the a...

AI Technical Summary

Problems solved by technology

This method is suitable for materials that are loose and easy to transport after impregnation of the catalyst carrier. When the catalyst carrier is highly adhesive after impregnation, it will adhere to the conveying parts, so that the continuous impregnation process cannot be realized; sometimes due to long-term work, the adhesion The material loses moisture and forms hard scale that adheres to the outer wall of the conveying screw conveyor. When the impregnated material is conveyed later, the wet impregnated carrier will be squeezed and damaged, and the molding rate of the catalyst is low.

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