Fischer-Tropsch synthesized residue wax passivation technology and device

Abstract

The invention discloses a Fischer-Tropsch synthesized residue wax passivation technology. The Fischer-Tropsch synthesized residue wax passivation technology comprises the following steps: adding residue wax containing an iron-based catalyst, which is obtained by Fischer-Tropsch synthesis, into a reaction container with inert gas protection, wherein the initial temperature is T1; then adding an oxidant into the reaction container; automatically carrying out passivation reaction, wherein the reaction temperature is T2; in a reaction process, cooling a material system to reduce the temprature andcontrolling the feeding of the oxidant to control the reaction temperature T2; after finishing feeding and when automatically carrying out the passivation reaction, keeping the reaction temperature T2 stable and gradually reducing the temperature until the passivation reaction is finished. Meanwhile, the invention discloses a device for realizing the passivation technology. According to the Fischer-Tropsch synthesized residue wax passivation technology, the iron-based catalyst in the Fischer-Tropsch synthesized residue wax and the oxidant are subjected to the passivation reaction so that stable-state iron is generated through activate-state iron and conditions that the iron-based catalyst in the Fischer-Tropsch synthesized residue wax and filtering dreg thereof are in contact with air tobe subjected to oxidation reaction and generate heat so that the danger of combusting the residue wax is caused in transportation, storage, subsequent treatment and byproduct processing processes areprevented.

Description

technical field [0001] The invention relates to a Fischer-Tropsch synthesis technology, in particular to a passivation process and a device for stabilizing an iron-based catalyst in slag wax after Fischer-Tropsch synthesis. Background technique [0002] Fischer-Tropsch synthesis is an indirect coal liquefaction technology, which uses synthesis gas (CO and H 2 ) is a process of synthesizing paraffin-based liquid fuels with catalysts (mainly iron) and appropriate reaction conditions as raw materials. High melting point wax can also be produced after degassing and cooling. [0003] During the iron-based slurry bed Fischer-Tropsch synthesis process, the filtration of slag wax requires regular replacement of the iron-based catalyst. During replacement, a large amount of organic wax is discharged together with the waste iron-based catalyst, forming waste wax from Fischer-Tropsch synthesis (residue wax filter residue, stable wax filter residue ). [0004] Fischer-Tropsch synthes...

AI Technical Summary

Problems solved by technology

Because the iron in the iron-based catalyst is in an activated state, it is very easy to oxidize and generate heat when it contacts with oxygen. When the heat cannot be discharged in time, it will cause the danger of burning the slag wax in the Fischer-Tropsch synthesis waste wax.

[0005] There are 20,000 tons of Fischer-Tropsch synthesis waste wax produced in the country every year, 60% of which are incinerated and 40% are buried, which not only pollutes the environment, but also wastes resources

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