Fixed bed reactor for producing maleic anhydride by benzene process with annual production capacity of 20 000 tons

Abstract

The present invention relates to a chemical reactor group using benzene as a raw material for maleic anhydride production, and the annual production capacity of the chemical reactor group is twenty thousand tons of the maleic anhydride. In China, the maximum annual production capacity of a single piece of the device using the benzene as the raw material for the maleic anhydride production is ten thousand tons per year, and a salt-melting cycling pump used for moving heat is all adopted in one piece. The reactor group in ten thousand tons per year has the problems as follows: firstly, the production capacity of the single piece of device is limited, which can not meet the requirement of the market development; secondly, when the device is used, the energy consumption of unit output is large, the effective utilization rate is low, and the equipment operation cost is high; thirdly, one piece of salt-melting cycling pump is used for moving heat, which causes that the heat concentrated and can be hardly moved out; fourthly, the reaction waste heat is too little, which can not be used completely.

Description

Technical field: [0001] The invention relates to a chemical reactor group for producing maleic anhydride using benzene as a raw material, and the annual production capacity is 20,000 tons of maleic anhydride. technical background: [0002] In the prior art, the production capacity of maleic anhydride using benzene as raw material is 10,000 tons per year, and the molten salt circulation pump for heat removal is all carried out by one unit. The 10,000-ton / year reactor group has 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 output is large, the effective utilization rate is low, and the equipment operation cost is high ; 3. Use a molten salt pump to remove the heat, the heat is concentrated and difficult to remove; 4. The residual heat of the reaction is too little to be fully utilized. Invention content: [0003] The purpose ...

AI Technical Summary

Problems solved by technology

The 10,000-ton / year reactor group has 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 output is large, the effective utilization rate is low, and the equipment operation cost is high ; 3. Using a molten salt pump to remove heat, the heat is concentrated and difficult to remove; 4. The residual heat of the reaction is too little to be fully utilized

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