Fixed bed reactor and its gas distributor

Abstract

The invention discloses a fixed bed reactor and a gas distributor, the gas distributor (7) comprises a feeding main pipe (71), a distribution ring pipe (73) and a plurality of distribution branch pipes (72), the upper end of the feeding main pipe is used for connection of an inlet pipe (5) of the fixed bed reactor, the lower end of the feeding main pipe is closed, the pipe wall of the feeding main pipe is provided with a plurality of discharge ports (711) in spaced arrangement along the circumferential direction, the distribution ring pipe is a circular ring shape arranged around the central axis (L) of the feeding main pipe, the pipe wall of the distribution ring pipe is provided with a plurality of material inlets (731), one end of each distribution branch pipe is connected with one discharge port, the other end of each distribution branch pipe is connected with one corresponding material inlet, a plurality of first dispensing nozzles (74)are, in intervals, arranged at the bottom of the distribution ring pipe along the extending direction of the distribution ring pipe, and each first dispensing nozzle tilts toward the central axis. Through the above scheme, airflow can be distributed more evenly.

Description

technical field [0001] The invention relates to the field of petroleum and chemical equipment, in particular to a fixed-bed reactor and a gas distributor thereof. Background technique [0002] In the field of petroleum and chemical industry, there are three basic forms of fixed bed reactors, including: axial fixed bed reactor, radial fixed bed reactor and tubular fixed bed reactor, each of which has different characteristics and applications. [0003] 1. Axial fixed bed reactor: The catalyst bed is arranged in a horizontal cake shape, the fluid flows through the bed from top to bottom along the axial direction, and the bed has no heat exchange with the outside world. The structure of this kind of reactor is simple, and the process design, calculation and equipment manufacturing are relatively simple, so it is the earliest application and the most common application at present. But this kind of reactor also has some disadvantages: the bed of the catalyst bed is generally th...

AI Technical Summary

Problems solved by technology

But this kind of reactor also has some disadvantages: the bed of the catalyst bed is generally thicker, and the resistance of the reactants to flow through the bed is large. In order to reduce the resistance, a large particle catalyst must be used; because of its large pressure drop, it has a certain impact on the strength of the catalyst. Higher requirements, preventing catalyst particles from being pulverized by the impact of high-speed airflow

In this way, the convex surface of the inner cylinder and the fan-shaped cylinder will bear the pressure from the catalyst, that is, the external pressure. Under the action of the external pressure, the stability and rigidity of the inner cylinder and the fan-shaped cylinder are required to be higher, which is likely to cause instability.

Images