Methanol-water reforming hydrogen production device and method for preparing hydrogen by using same

Abstract

The invention discloses a methanol-water reforming hydrogen production device and a method for preparing hydrogen by using the same. The device comprises a liquid reservoir vessel, a heat exchanger, a vaporizing chamber, a reforming chamber and a separation chamber. The device comprises one or a plurality of heating units for conducting temperature control for components of the hydrogen production device needing temperature control. The heating units are heated by using residual gas output through the separation chamber or / and prepared hydrogen. The temperature in the reforming chamber is set to be 280-409 DEG C, the temperature in the separation chamber is set to be 400-460 DEG C, and a transfer passage between the reforming chamber and the separation chamber passes through a preheat temperature control mechanism which is used for heating gas output from the reforming chamber. The preheat temperature control mechanism serves as buffer between the reforming chamber and the separation chamber to enable the temperature of the gas output from the reforming chamber to be same with or close to the temperature of the separation chamber. The methanol-water reforming hydrogen production device and the method can effectively use the residual gas of the device, improve effective use ratio of resources, and reduce environmental contamination.

Description

technical field [0001] The invention belongs to the technical field of hydrogen preparation, and relates to a hydrogen production equipment, in particular to a methanol steam reforming hydrogen production equipment; at the same time, the invention also relates to a method for preparing hydrogen by using the above equipment. Background technique [0002] Among the many new energy sources, hydrogen energy will become the most ideal energy source in the 21st century. This is because, in the case of burning the same weight of coal, gasoline and hydrogen, hydrogen produces the most energy, and the product of its combustion is water, without ash and waste gas, and will not pollute the environment; while the combustion of coal and oil produces These are carbon dioxide and sulfur dioxide, which produce the greenhouse effect and acid rain, respectively. The reserves of coal and oil are limited, while hydrogen is mainly stored in water, and the only product after combustion is water,...

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Problems solved by technology

This method only guarantees the high temperature requirement of the separation chamber, but this scheme cannot meet the low temperature requirement of the catalyst

[0019] However, usually the optimal temperature for reforming is quite different from the optimal temperature for palladium membrane separation. Generally, the effect of the catalyst is better at a lower temperature, while the palladium membrane separation in the separation chamber requires a higher temperature, which leads to the preparation of the above method. The efficiency is low, and the existing methods do not solve this problem well

[0020] In addition, reforming chambers, heat exchangers, and separation chambers usually need to be heated by heating units. The existing heating methods are generally boiler heating, electric heating (a lot of electric energy is also generated by thermal power plants), etc. On the one hand, it pollutes the environment and at the same time Also did not effectively utilize the gas separated by the original equipment

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