A gas heat exchange reactor and sulfuric acid catalytic decomposition method

Abstract

The invention belongs to the field of chemical engineering and the field of thermochemical cycle hydrogen production, and particularly relates to a gas heat exchange type reactor and a sulfuric acid catalytic decomposition method using the gas heat exchange type reactor. According to the gas heat exchange type reactor provided by the invention, high-temperature gas is introduced into a shell to heat a plurality ofbayonet tube internal heat exchange type reactor assemblies arranged in the shell, the assemblies are of a sleeve structure, the annular space betweeninner tubes andouter tubes is used for accommodating a catalyst, and reaction materials passing through the annular space are subjected to catalytic reaction under the heating condition. A reaction material temporary storage area ofthe reactor is connected with an auxiliary conveying pump and an auxiliary cooler, and a part of the reaction materials are circularly cooled, so that sealing pieces between a tube plate and the bayonet tube internal heat exchange type reactor assembliesand between the tube plate and a temperature measuring assembly are prevented from being damaged due to overtemperature. According to the reactor,high-temperature gas can be used as a heating medium to realize efficient catalytic decomposition of sulfuric acid.

Description

technical field [0001] The invention belongs to the field of chemical industry and the field of thermochemical cycle hydrogen production, in particular to a gas heat exchange reactor and a sulfuric acid catalytic decomposition method using the reactor. Background technique [0002] Hydrogen is an important industrial raw material, as well as a non-polluting, renewable, clean energy and energy carrier. In addition to the traditional application in synthetic ammonia, synthetic methanol and other industries, the application and demand of hydrogen in petroleum refining, coal liquefaction and other fields have increased rapidly in recent years; There is also great potential for demand in other fields [1] . In 2012, my country's hydrogen production has exceeded 16 million tons, ranking first in the world, and has been growing at a rate of 7% in recent years. However, at present, most of hydrogen is produced by conversion of fossil fuels, and a large amount of CO is emitted duri...

AI Technical Summary

Problems solved by technology

Taking Document 5 as an example, in order to achieve a good heat exchange effect when using gas heating, high-pressure and high-temperature gas must be used for heating, which places very high requirements on the sealing structure between the bayonet tube outer tube and the tube sheet. During the reaction process, the bayonet tube used will quickly conduct heat from the heat exchange area to the sealing structure between the outer tube of the bayonet tube and the tube sheet at the bottom of the reactor, which can easily cause the sealing structure to overheat, thereby causing serious leakage hazards

[0016] In summary, although some conceptual designs have been proposed for the gas heat exchange reactor and its application in sulfuric acid decomposition reaction, the heat exchange sulfuric acid decomposition equipment heated by gas needs to be operated under very harsh conditions such as high temperature, high pressure, and strong corrosion. There are a lot of scientific and engineering problems in the design and manufacture of equipment, including heat transfer performance, temperature and flow velocity distribution, material selection, structural layout, sealing method, etc. There is still a huge room for improvement in its application in sulfuric acid decomposition reaction

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