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Steam methane reforming hydrogen production device and process

A reforming hydrogen production device and reforming hydrogen production technology, applied in the chemical industry, can solve the problems of small internal space of the reactor main body, complex internal structure of the reactor, insufficient to meet the catalytic reforming, etc. Heat loss, high production efficiency

Active Publication Date: 2021-04-06
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Steam methane reforming hydrogen production device and process
  • Steam methane reforming hydrogen production device and process
  • Steam methane reforming hydrogen production device and process

Examples

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Effect test

Embodiment 1

[0038] Example 1: Steam methane reforming hydrogen production device and reaction principle

[0039] Such as Figure 1-5 As shown, the steam methane reforming hydrogen production unit provided by the present invention includes a sequentially connected HDS hydrodesulfurization unit 17, a steam methane reforming hydrogen production reactor 18, a low-temperature water-gas shift reactor 19, a separator 20 and a PSA Pressure swing adsorption unit 21; the steam methane reforming hydrogen production reactor 18 includes a feed pipe at the top of the reaction device, a discharge main pipe 4, a gas mixer 3, a plurality of double-pipe SMR reactors 15 in the middle and a combustion chamber 9 and the fuel intake pipe 14 and combustion exhaust gas outlet pipe 10 at the bottom. Described feed pipe comprises methane feed pipe 1, steam feed pipe 2, and two feed pipes merge into feed main pipe, and feed main pipe connects gas mixer 3; The device is divided into an inner chamber and an annular...

Embodiment 2

[0047] Example 2: Steam methane reforming hydrogen production process

[0048] According to above-mentioned reaction technique, one group of concrete embodiment is provided:

[0049] The methane flow rate entering the gas mixer is 10L / min, and the steam flow rate is 20 L / min; the preheating part of the methane and steam double-pipe SMR reactor is preheated to about 580°C; the material ratio is steam:methane=2:1; The temperature of the reactor is controlled at 850°C and the pressure is 0.7MPa. Under the action of the catalyst, the material undergoes a reforming reaction in the reaction part of the reactor, and the hydrogen product is obtained through subsequent processes. In this example, the thermal efficiency is 76.3%, and the hydrogen production rate is 112.6 Nm 3 / h.

Embodiment 3

[0050] Example 3: Hydrogen production process by steam methane reforming

[0051] According to above-mentioned reaction technique, one group of concrete embodiment is provided:

[0052] The methane flow rate entering the gas mixer is 10L / min, and the steam flow rate is 30 L / min; the preheating part of the methane and steam double-pipe SMR reactor is preheated to about 580°C; the material ratio is steam:methane=3:1; Control the temperature of the reactor to 850°C and the pressure to 0.7MPa. Under the action of the catalyst, the material undergoes a reforming reaction in the reaction part of the reactor, and the hydrogen product is obtained through subsequent processes. In this example, the thermal efficiency is 78.8%, and the hydrogen production rate is 118.4 Nm 3 / h.

[0053] Operate through the process in the example, taking into account the influence of multiple variables, and optimize the process flow by adjusting the SCR (steam to methane ratio) and steam pressure parame...

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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...

Claims

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Application Information

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IPC IPC(8): C01B3/40
CPCC01B3/40C01B2203/0233C01B2203/0811C01B2203/1052C01B2203/1082C01B2203/1241Y02P20/129
Inventor 张国杰梁周杰李国强王影赵钰琼贺亚俊张瑜武文俊
Owner TAIYUAN UNIV OF TECH
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