Slurry bed reactor

Abstract

The invention provides a slurry bed reactor which comprises a reactor cylinder body, wherein a gas leading-in device is arranged at the lower part inside the inner chamber of the reactor cylinder body, a fischer-tropsch wax and catalyst separating device is arranged inside the inner chamber of the reactor cylinder body, a fischer-tropsch wax extracting and back flushing system communicated with the fischer-tropsch wax and catalyst separating device and used for extracting fischer-tropsch wax and back washing to the fischer-tropsch wax and catalyst separating device is arranged at the exterior of the reactor cylinder body; and a gas-liquid separation device positioned above the fischer-tropsch wax and catalyst separating device is further arranged inside the inner chamber of the reactor cylinder body. In the slurry bed reactor provided by the invention, through the arrangement of the gas-liquid separation device, gas flow entering the fischer-tropsch wax and catalyst separating device can be reduced, so that gas is effectively prevented from invading and occupying the surface of a filtration medium, and the effective surface of the filtration medium is improved. Meanwhile, the invention solves the problem of reduced permeability of the filtration medium, which is caused by the fact that catalyst particles are dried up on the filtration medium due to the situation that the gas dries the apertures of the filtration medium.

Description

technical field [0001] The invention relates to the field of Fischer-Tropsch synthesis, in particular to a slurry bed reactor. Background technique [0002] In recent years, the global crude oil price has gradually increased, especially in some countries rich in coal and short of oil, the development of non-petroleum energy technology has attracted extensive attention. Fischer-Tropsch synthesis refers to synthesis gas (H 2 +CO) under the action of a catalyst, under the appropriate reaction temperature and reaction pressure, the reaction process of synthesizing hydrocarbon liquid fuels and high value-added chemicals. Coal or natural gas is transformed into high-quality liquid fuels and high value-added chemicals through Fischer-Tropsch synthesis, which not only uses coal resources reasonably, efficiently and cleanly, but also makes up for the relative shortage of petroleum resources, making Fischer-Tropsch synthesis technology an alternative energy source for petroleum effi...

AI Technical Summary

Problems solved by technology

As we all know, the slurry bed Fischer-Tropsch reactor is a gas-liquid-solid three-phase reactor with a high gas holdup, and the gas is much easier to pass through the filter medium than the clear liquid, which affects the extraction of the clear liquid and reduces the filtration area of ​​the filter. use efficiently

At the same time, the gas will also dry the pores of the filter element, causing some catalyst particles to dry up in the pores of the filter element, reducing the permeability of the filter element

In addition, the synthesis gas is led out of the reactor, and the effective utilization rate of the synthesis gas is reduced

The catalyst trapped on the surface of the filter medium will thicken as the filtration time increases. This system has no effective way to slow down the thickening of the catalyst filter cake. It can only be removed from the surface of the filter medium by forced backwashing. Stripping will prolong the backwashing time or increase the frequency of backwashing, resulting in a shorter pumping time of the clear liquid and reducing the system efficiency

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