A kind of method for preparing fixed bed reactor packing

Abstract

The invention discloses a method for preparing a fixed bed reactor filling material. The preparation method comprises the following steps: (1) sieving quartz sand to obtain particles with a uniform size, mixing the sieved quartz with solid filling powder, adding an adhesive, and evenly stirring to obtain a mixed material; (2) pouring the mixed material into a cylinder polishing machine; (3) setting the rotation speed and operation time of the cylinder polishing machine, and starting the machine to produce the fixed bed reactor filling material; wherein during the production process, the powder is gradually wrapped on the external surface of the quartz sand under the co-action of the wall extrusion force generated by the centrifugal rotation of the quartz sand and the adhesive force of the adhesive so as to form particles composed of a core (quartz sand) and a shell (powder). The procedure is concise, the steps are few, the cost is low, and the operation is convenient. The reaction activity of the filling material can be improved, and moreover, the bed pressure drop of the reactor can be prominently reduced, so the method is practical and is worth to promote.

Description

Technical field [0001] The invention relates to the field of packing design and application of a chemical reactor, in particular to a method for preparing packing for a fixed bed reactor. Background technique [0002] Gas-solid fixed-bed reactors are widely used in the chemical industry (such as ammonia synthesis, water vapor conversion, methane reforming, etc.) because of their simple structure, hard-wearing packing, wide applicable temperature and operating pressure range. Since the gas-solid fixed bed reactor needs to be filled with solid packing materials, generally speaking, the finer the particle size of the packing, the higher the reaction activity and the higher its effective utilization rate. However, in actual situations, fine-grained packing will cause gas flow resistance Significantly increase, disrupt normal operation, and cannot meet engineering application requirements. Therefore, the filler must be granulated to reduce bed pressure drop. [0003] At present, in te...

AI Technical Summary

Problems solved by technology

The advantage of the pressure forming granulation method is that it can produce larger agglomerates, and the produced materials also have considerable mechanical strength; but the disadvantages are that there are many processes, complicated equipment control, and the phenomenon of material sticking film is easy to appear during the operation process.

[0006] To sum up, for the granulation of fixed bed reactor filler, in order to obtain higher particle strength, the traditional stirring granulation method must use a higher binder content, but this will cause the binder to powder Severe coverage of the surface of the body; while the particles formed by the pressure molding granulation method have higher strength, but the porosity between the powder particles will be greatly reduced

It can be seen that the granulation method of traditional fixed bed reactor packing will reduce the mass transfer rate between the reaction gas and the powder particles, thereby reducing the chemical reactivity and effective utilization of the packing.