Shell pass multi-cavity type fixed bed reactor

Abstract

The invention relates to a fixed-bed reactor, a shell side of which is divided into a plurality of chambers. Currently, all the fixed-bed reactors with shells and tubes adopt a shell-side structure as a chamber, thus causing uneven heat transfer, insufficient heat exchange and worse utilization of residual heat. Between an upper cannular plate and a lower cannular plate inside the shell of the invention, two shell-side baffles are arranged along the shell axial direction and divide the shell into three chambers, and reaction tubes as well as three semicircular traverse baffles are arranged inside the chambers at the two sides, thus forming cross current and parallel flow as a flow form of heat-exchanging mediums between tubes. Under the condition of existing equipments, the capacity of manufacturing large-scale reactors is doubled by the invention; the reactors are applicable for catalysts with high load and have balanced reaction, even heat transfer and sufficient heat exchange, and the utilization of residual heat is more complete.

Description

Technical field: [0001] The invention relates to a fixed-bed reactor whose shell side is divided into multiple chambers. The reactor of this type is mainly used in the field of large-scale phthalic anhydride, maleic anhydride, acrylic acid and the like using a fixed bed for gas-phase oxidation reaction. Background technique: [0002] With the rapid development of the chemical industry, the requirements for chemical equipment are becoming more and more large-scale. The large-scale chemical equipment has great benefits in terms of ease of operation, energy saving and consumption reduction, and reduction of production and operation costs. The current devices have the following problems: 1. The single production capacity of the device is limited, which cannot meet the needs of market development; 2. When the device is in use, the energy consumption per unit of output is large, the effective utilization rate is low, and the equipment operation cost is high; 3. Easy Concentration ...

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Problems solved by technology

The current devices have the following problems: 1. The single production capacity of the device is limited, which cannot meet the needs of market development; 2. When the device is in use, the energy consumption per unit of output is large, the effective utilization rate is low, and the equipment operation cost is high; 3. Easy It causes heat concentration and it is difficult to remove it evenly; 4. The residual heat of the reaction in the existing device is too little to be fully utilized

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