Shell side multi-chamber multi-layer fixed bed reactor

Abstract

The invention relates to a shell-side multi-cavity multi-layer fixed-bed reactor. At present, the shell-and-tube fixed-bed reactors all adopt the structure of one chamber on the shell side, so the heat transfer is uneven, the heat exchange is insufficient, and the waste heat is not better utilized. The shell of the present invention is composed of an upper shell and a lower shell. In each shell, two shell-side baffles are arranged between the upper tube sheet and the lower tube sheet along the axial direction of the shell. The shell-side baffles separate the shell Divided into three cavities, reaction tubes are set in the cavities on both sides, and three semicircular baffles are set in the cavities on both sides, so the flow form of the heat exchange medium between the tubes is cross flow and parallel flow. The invention doubles the ability to manufacture large-scale reactors under the condition of existing equipment; the reactor can be applied to high-load catalysts, and has stable reaction, uniform heat transfer, sufficient heat exchange and more thorough utilization of waste heat.

Description

Technical field: [0001] The invention 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 temperature d...

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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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