Annular pipe reactor

Abstract

The invention discloses an annular pipe reactor, comprising a straight sleeving pipe, an inner pipe and an outer pipe thereof, a jacketed communication pipe, a bend and an installation support. The end part of the bend is connected with the end of the inner pipe in series to form a reaction material communication flow channel. The jacketed communication pipe is arranged at the position of the bend, and is connected with a jacket flow channel which is formed between the inner pipe and the outer pipe in series to form a cooling communication flow channel. The installation support is arranged on the outer pipe. The bend is welded and sealed with the inner pipe to form an integrated structure, or one part of the bend is welded and sealed with the inner pipe and the other part of the bend is welded and sealed with the flange of the inner pipe to form an integrated structure, or one part of the bend is welded and sealed with the inner pipe and the other end of the bend is connected and sealed with the flange of the inner pipe to form an integrated structure. The connection of welding and sealing comprises the steps of firstly welding and arranging a concentric locating piece, and then welding and sealing the connection ends of the bend and the straight sleeving pipe at the outside of the end wall of the bend or at the outside of the end wall of the inner pipe. The annular pipe reactor meets the requirements of large-scale production and high productivity, and has the characteristics of good connecting tightness, high strength and good stability.

Description

technical field [0001] The invention relates to the engineering technology of special mechanical equipment for petrochemical industry, in particular to a loop reactor. Background technique [0002] In the prior art, polyolefins (for example: polypropylene and polyethylene) are the varieties with the largest output and consumption in general-purpose synthetic resins, and their production techniques include three types: namely slurry method, gas phase method and solution method. The so-called slurry method (Slurry Process), also known as slurry method or solvent method, is the earliest technology used to produce polypropylene in the world. The production technology of slurry method is the main method of producing HDPE. The production process method is: mixing propylene or ethylene with hydrocarbon solvent, and the produced polymer is suspended in the solvent. The industrial application of slurry method is earlier, and the process technology is mature. And the pressure and tem...

AI Technical Summary

Problems solved by technology

[0007] (1) When the straight bushing is installed vertically, it is difficult to guarantee the strength and stability of the towering steel structure under dynamic load. If only the method of increasing the wall thickness of the straight bushing is used to improve the strength and stability Not only the investment cost of the equipment is large, but also the thermal resistance of the straight casing increases with the increase of the thick wall, which has a bad influence on the heat exchange effect of the loop reactor;

[0008] (2) The parallelism of the flange sealing surfaces at both ends of the straight casing and the processing difficulty perpendicular to the axis of the straight casing will increase, and the difficulty of connecting the elbow to the two ends of the straight casing will also increase.

[0009] In addition, the flow state of the cooling medium in the jacket gradually stabilizes, forming a film-like laminar flow on the outer surface of the inner tube of the straight sleeve, which increases the thermal resistance, thereby reducing the heat transfer of the cooling medium in the jacket efficiency

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