A two-stage heavy oil slurry bed hydrogenation equipment and method

Abstract

The invention discloses a two-stage heavy oil slurry bed hydrogenation device and method. The device comprises a first slurry bed reactor, a first separation unit made communicated with the first slurry bed reactor, a second slurry bed reactor made communicated with the discharge end of the first separation unit, and a second separation unit made communicated with the second slurry bed reactor. The first slurry bed reactor and the second slurry bed reactor each comprises an ascending pipe (4), an expanded section (1) on the top of the ascending pipe, and a descending pipe (8), wherein the expanded section (1) is made communicated with the upper portion of the descending pipe (8), the lower portion of the ascending pipe (4) is made communicated with the bottom of the descending pipe (8), a slurry phase separator is arranged in the expanded section (1), the slurry phase separator is of a sleeve structure composed of an inner sleeve (3) and an outer sleeve (2), the bottom of the ascending pipe (4) is provided with a fluid distributor (7), the bottom of the ascending pipe (4) is provided with a raw material inlet (9), and the top of the expanded section is provided with a material outlet (10). According to the two-stage heavy oil slurry bed hydrogenation device and method, long-period operation of the reactors can be achieved, and the heavy oil hydrogenation conversion rate and the machining efficiency of follow-up equipment for slurry are improved.

Description

technical field [0001] The invention relates to a heavy oil hydrogenation equipment and method, more specifically, to a heavy oil hydrogenation equipment and method using a two-stage slurry bed reactor. Background technique [0002] Hydrogenation is an important technical route for the treatment of inferior raw materials. Through hydrogenation, impurities such as metals, colloids, residual carbon, sulfur, and nitrogen in heavy oil products can be effectively removed. At present, the most commonly used in the hydrogenation process is the downflow fixed bed reactor, that is, the trickle bed reactor, but heavy oil products such as residual oil and coal liquefied oil are prone to poisoning of the hydrogenation catalyst or catalyst pores due to high impurity content. Blockage and rapid deactivation, and impurities may block the bed layer to cause a rapid increase in pressure drop, resulting in poor working conditions of the reactor, or even failure to operate normally. The react...

AI Technical Summary

Problems solved by technology

At present, the most commonly used in the hydrogenation process is the downflow fixed bed reactor, that is, the trickle bed reactor, but heavy oil products such as residual oil and coal liquefied oil are prone to poisoning of the hydrogenation catalyst or catalyst pores due to high impurity content. Blockage and rapid deactivation, and impurities may block the bed layer, causing a rapid increase in pressure drop, resulting in poor reactor conditions, or even failure to operate normally

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