Method for producing centre tube of reactor

Abstract

A reactor central tube making process relates to oil refining reactor members making method. The making process is provided as follows, the central tube is radially divided into multi-peel ring-shape valvings, the ring-shape valvings are divided into segments, and a flange is used to connect two segments; the inner cavity of every ring-shape valving is fixed by a support frame; between joint faces of valvings are arranged sealing materials and the joint faces are clamped by clamping parts; a monitoring instrument for welding is used to detect verticality, roundness, length, and gap of valvings, wherein the gap between the ring-shape valvings is less than 0.8mm; each ring-shape valving is processed by spot welding on the welding position, and the valvings are connected together to form an integrated central tube; each valving is suspended into a reactor from the manhole of the reactor, and the whole valvings are assembled into an integrated central tube according to position. By separating and assembling the central tube, the diameter of the central tube can be increased. The invention is provided with scientific technic process and remarkable economic benefit.

Description

technical field [0001] The invention relates to a method for manufacturing a central pipe of a reactor, which belongs to a method for manufacturing reactor components used in the field of petroleum refining. Background technique [0002] At present, the central pipe used in the oil refining reactor in the petroleum field is a one-piece welded structure. When assembling, the central pipe enters from the manhole of the reactor. It is worth mentioning that the manhole on the existing reactor can only be adapted to the one-piece welded The entrance and exit of the center pipe, and this kind of center pipe cannot meet the needs of capacity expansion and transformation due to its small diameter and low work efficiency. In order to improve work efficiency, it is necessary to improve the diameter of the center tube and carry out capacity expansion transformation on the center tube. Once the diameter of the center tube is increased, the center tube cannot be changed from the existing...

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Problems solved by technology

[0002] At present, the central pipe used in the oil refining reactor in the petroleum field is a one-piece welded structure. When assembling, the central pipe enters through the manhole of the reactor. It is worth mentioning that the manhole on the existing reactor can only be adapted to the one-piece welded The entrance and exit of the center pipe, and this kind of center pipe cannot meet the needs of capacity expansion and transformation due to its small diameter and low work efficiency

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