Steam methane reforming hydrogen production device and process

Abstract

The invention discloses a steam methane reforming hydrogen production device and process. The device comprises a feeding pipe at the top, a discharging main pipe, a gas mixer, a plurality of double-pipe steam methane reforming SMR reactors in the middle, a combustion chamber, a fuel gas inlet pipe at the bottom and a combustion waste gas outlet pipe. Mixed raw material gas of the steam and the natural gas subjected to hydrodesulfurization purification treatment enters a double-tube SMR reactor to be subjected to a reforming reaction; the obtained synthesis gas enters a low-temperature water-gas shift reactor to enable CO to react with water vapor to generate H2 and CO2, and recovering heat of mixed gas generated by reaction through a heat exchanger; and the cooled reaction gas enters a PSA system to be subjected to gas separation, and waste gas left after hydrogen separation is used as fuel to enter a combustor to provide energy for SMR reaction. Compared with the prior art, the process provided by the invention can improve the heat efficiency and the hydrogen production rate to the maximum extent, and is not only suitable for on-site hydrogen refueling stations, but also suitable for hydrogen refueling systems of marine transportation tools in coastal areas.

Description

technical field [0001] The invention relates to a steam methane reforming hydrogen production device and a process, belonging to the technical field of chemical industry. Background technique [0002] With the development and progress of society, my country is affected by global climate change and environmental problems, and the pace of energy conservation, emission reduction and energy cleanliness is accelerating. Hydrogen energy, as an efficient, clean, safe and sustainable new energy source, has attracted much attention. [0003] As a secondary energy source, hydrogen energy is widely used in oil refining, electrochemistry, aerospace, metallurgy and other fields. Although hydrogen energy is good, its production and preparation are very limited. At present, my country's industrial hydrogen production technology is relatively mature, mainly using fossil energy as raw material, and reacting with water at high temperature to obtain hydrogen energy. In addition, there are som...

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Problems solved by technology

The device has a compact structure and can meet small-scale hydrogen production, but the internal space of the reactor body is relatively narrow, the internal structure of the reactor is complex, and the manufacturing and maintenance costs are high

[0006] Chinese patent CN103373706A discloses a method and device for hydrogen production by methane reforming. The main structure includes a fluidized reforming reactor, a regenerator and a heat exchanger. The technological process saves equipment investment, but catalyst regeneration will produce greenhouse gas CO 2 , are emitted into the atmosphere and have an impact on the environment

[0007] Chinese patent CN201558692U discloses a reactor with high temperature resistance and high pressure for convenient loading and unloading of catalyst. The device has the advantages of simple structure, easy sealing, convenient disassembly and low cost, but its design structure is complex and requires high requirements. In addition, the highest reaction temperature of the device is low (450°C), which is not enough to meet the higher temperature catalytic reforming reaction of methane steam and catalytic reforming reaction of methane carbon dioxide.

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