Thermal pyrolysis method for Fischer-Tropsch synthesis reaction wax residue

Abstract

The invention discloses a thermal pyrolysis method for Fischer-Tropsch synthesis reaction wax residue. The thermal pyrolysis method comprises the following steps of: (1), conveying the Fischer-Tropsch synthesis reaction wax residue to a horizontal rotary kiln for carrying out thermal pyrolysis to obtain pyrolysis oil gas and residue; (2), de-dusting and cooling the pyrolysis oil gas in sequence and enabling the de-dusted and cooled pyrolysis oil gas to enter a gas-liquid separator for carrying out gas-liquid separation to obtain non-condensable gas and liquid oil; (3), conveying the non-condensable gas to a heating furnace for carrying out combustion, wherein smoke gas generated by the combustion is used for transferring heat for the horizontal rotary kiln; (4), returning the residue to a charging port of the horizontal rotary kiln, enabling the residue to enter the horizontal rotary kiln and exhausting the residue out of the horizontal rotary kiln through an overflow port of the horizontal rotary kiln. According to the thermal pyrolysis method for Fischer-Tropsch synthesis reaction wax residue disclosed by the invention, heat transfer is directly carried out onto the high-temperature residue and the wax residue material through a back-mixing process, so that the pyrolysis efficiency can be greatly improved, and therefore, the wax residue reaches the pyrolysis temperature within a short time, the recovery rate of the effective components of the wax residue is as high as 85%, the waste is recycled, and the environment-friendly treatment requirements are satisfied.

Description

technical field [0001] The invention relates to a thermal cracking method for Fischer-Tropsch synthesis reaction wax residue. Background technique [0002] In the coal-based indirect liquefaction process, in order to maintain the reactivity of the Fischer-Tropsch catalyst, the spent catalyst will be regularly removed and replaced. At the same time, in the refining process of the synthetic liquid product heavy wax, the filter aid used will form a filter cake. The waste wax slag solids produced by these two processes contain 30-50% wax products, and the remaining components are spent catalysts, clay, and diatomaceous earth. Recycling and utilizing the wax components is an urgent technical link that needs to be solved at present. At present, the main way to reduce environmental pollution is to incinerate waste wax slag in boilers, which has high operating costs and will also have a certain impact on the service life of boilers. Contents of the invention [0003] The purpose ...

AI Technical Summary

Problems solved by technology

At present, the main way to reduce environmental pollution is to incinerate waste wax slag in boilers, which has high operating costs and will also have a certain impact on the service life of boilers.

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