Catalyst precursor industrial drying method capable of being easily influenced by temperature and oxygen and system thereof

Abstract

The invention provides a catalyst precursor industrial drying method capable of being easily influenced by temperature and oxygen and a system thereof. The method comprises the steps that a catalyst precursor is dried by a drying machine; circulation hot water is introduced into blades, a shaft and a jacket of the drying machine for providing heat sources; nitrogen gas continuously passes through a cavity of the drying machine, so that effects of protecting gas and carrying the moisture are achieved; the nitrogen gas carries out the moisture and then enters a filter; catalyst dust is filtered and is pumped out by a draught fan to be discharged; the dried catalyst precursor is cooled and sieved to obtain a product. The system comprises the drying machine, the filter, the draught fan, a rotary feeder, a vibration sieve, a heating water tank, a cooling water tank, a heating water pump, a cooling water pump and an electric heater. The drying method provided by the invention has the advantages that the catalyst precursor is uniformly and stably dried in inert environment at low temperature; the catalyst precursor can be effectively prevented from spontaneous combustion, decomposition and inactivation in the drying process; the dried catalyst precursor has good flowability.

Description

technical field [0001] The invention relates to an industrial drying method and system of a catalyst precursor easily affected by temperature and oxygen, and belongs to the technical field of catalyst drying. Background technique [0002] The supported catalyst precursor after industrial impregnation needs to maintain a water content of about 10-40% by mass during transportation, and the stage of preparing the finished catalyst usually has special requirements for water content, so this part of water needs to be removed by industrial drying equipment. remove. The fluidity of the dried catalyst precursor is required to be good. [0003] The catalyst drying unit is an important link in the catalyst preparation technology, and the catalyst drying effect directly affects the quality and yield of the catalyst. Currently commonly used catalyst drying equipment such as box dryers, drum dryers, and belt dryers has uneven temperature distribution in different positions inside these...

AI Technical Summary

Problems solved by technology

Currently commonly used catalyst drying equipment such as box dryers, drum dryers, and belt dryers, the temperature distribution in different positions inside these drying equipment is uneven, and it is easy to generate local hot spots to change the composition of the catalyst precursor and affect the performance of the catalyst.

[0004] CN103447041A discloses a method for preparing a catalyst using a rapid drying stage, and applying the prepared catalyst to Fischer-Tropsch synthesis. The method uses a laboratory oven to dry the cobalt nitrate catalyst impregnated on a silica-alumina carrier, but does not Drying technology related to industrialization

However, there is no report on the drying method applied to the supported catalyst precursor which is easily affected by temperature and oxygen.

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