Shell pass multi-cavity type multi-layer bed fixed bed reactor

Abstract

The invention relates to a multi-layered fixed-bed reactor, a shell side of which has 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. The shell of the invention is composed of an upper shell and a lower shell, and between an upper cannular plate and a lower cannular plate inside each shell, 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 utility model relates to a shell-side multi-cavity multi-layer fixed-bed reactor, which is mainly used in the field of large-scale acrylic acid and other fields where multi-layer fixed beds are used 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 existing devices have the following problems: 1. The production capacity of a single device is limited, which cannot meet the needs of market development; 2. When the device is in use, the energy consumption per unit output is large, the effective utilization rate is low, and the operating cost of the device is high; 3. The device is mobile The heat is not uniform, and the temperatu...

AI Technical Summary

Problems solved by technology

The existing devices have the following problems: 1. The production capacity of a single device is limited, which cannot meet the needs of market development; 2. When the device is in use, the energy consumption per unit output is large, the effective utilization rate is low, and the operating cost of the device is high; 3. The device is mobile The heat is uneven, and the temperature difference inside the equipment is large; 4. The residual heat of the reaction is too little to be fully utilized

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