Pi-shaped reactor

The utility model discloses a pi-shaped reactor, which comprises a pipe body and a venturi mixer, the pipe body is pi-shaped and is divided into two sections, namely a steam pipe section and a reaction pipe section, the two ends of the venturi mixer are respectively butted with the steam pipe section and the reaction pipe section, and the inner opening surface of the butted part is welded by argon arc welding. And the outer opening surface is welded through submerged-arc welding. According to the utility model, an inner welding mode and an outer welding mode are adopted for fixing, so that the welding quality is effectively ensured, and the welding tightness is ensured. 本实用新型公开了一种π型反应器，包括管体和文丘里混合器，所述管体为π型，且分为两段，分别对应为蒸汽管段和反应管段，所述文丘里混合器的两端分别与蒸汽管段与反应管段对接，且对接处的内口面通过氩弧焊焊接，外口面通过埋弧焊焊接。本实用新型采用内外两种焊接方式固定而成，有效的保证焊接质量，保证焊接紧固性。