Cold leveling method for after-welding deformation of gasoline and diesel hydrofining Phi3,000 redistribution plates

Abstract

The invention relate to a cold leveling method for the after-welding deformation of gasoline and diesel hydrofining Phi3,000 redistribution plates. In order to prevent deformation and ensure the flatness of the redistribution plates, the method comprises the following measures that A132 is selected as a welding material, low-current multilayer multipass welding is required to be adopted as much as possible during welding, and interpass temperature is strictly controlled; when the redistribution plates are assembled, two redistribution plates are spot-welded together back to back, and joints of out edges of the redistribution plates and sections of middle manholes of the redistribution plates are continuously spot-welded for reinforcement at an equal interval of 200mm; and after the redistribution plates are welded, a G10 type air pick is adopted for leveling equipment, air pressure is 0.6MPa, a drill bit of the air pick is ground into a round-headed small hammer shape, target weld metal is required to be accurately hammered for leveling operation, peripheral fillet weld metal is required to be hammered more and more densely and sequentially along the same direction, and the redistribution plates are simultaneously measured, and are measured once when the weld metal is hammered for a circle to prevent excessive hammering.

Description

technical field [0001] The invention relates to a welding method for a hydrogenation reactor in the petrochemical oil refining industry, in particular to a cold leveling method for deformation of a Φ3000 redistribution plate after welding for gasoline and diesel hydrogenation refining. Background technique [0002] In the petrochemical refining industry, the hydrogenation reactor is the most critical equipment in the entire hydrogenation unit. In the hydrogenation reactor, the feedstock oil mixed with hydrogen in a certain proportion is refined and cracked by the action of a catalyst under high temperature and high pressure. In this process, the internal components of the reactor play a very important role. The Φ3000 redistribution plate is the main internal component of the hydrogenation reactor. The main function of the distribution plate is to distribute the reaction materials evenly on the catalyst bed, to avoid local overheating and coking of the bed, and to better pl...

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Problems solved by technology

[0005] This shows that the above-mentioned existing welding method of petrochemical oil refining industry hydrogenation reactor obviously still has inconvenience and defective in method processing method and use, and urgently needs to be further improved

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and there is no suitable processing method for general processing methods that can solve the above-mentioned problems. This is obvious. It is a problem that relevant industry players are eager to solve

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