A combined heat and power system based on chemical chain methane reforming hydrogen production process

Abstract

The invention discloses a cogeneration system based on a chemical-chain methane reforming process for hydrogen production, belonging to the related technical field of energy utilization equipment. Thecogeneration system comprises a reactor for partial oxidation of methane, a secondary steam reforming reactor, a steam generator, a steam reduction reactor, a fuel cell stack and an oxygen carrier cyclic feeder, wherein a process for preparing synthetic gas through partial oxidation of methane and a process for preparing hydrogen through steam reduction are coupled through a chemical-chain oxygencarrier; a secondary reforming device is adopted to realize low-energy-consumption hydrogen production; fuel cell fuel cells are utilized so as to realize the output of electric power; and heat produced in the reaction process is collected and distributed by a heat exchanger, so high-efficiency external heat supply is realized. Targeted design is carried out on the composite oxygen carrier used in the system. The cogeneration system provided by the invention can realize low-cost, high-energy-utilization-rate and environment-friendly gas power generation and heat supply under the conditions oflow energy consumption and miniaturization, and is compact in equipment layout and flexible and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field related to energy utilization equipment, and more specifically relates to a combined heat and power system based on a chemical chain methane reforming hydrogen production process. Background technique [0002] As a clean energy, hydrogen energy has attracted more and more attention in recent years because it can not only match the existing energy system, but also rely on fuel cells and other processes to achieve efficient energy conversion. By combining hydrogen production equipment and fuel cell technology, the small hydrogen power generation device can be used as vehicle power supply, uninterruptible power supply, etc., and can be widely used in military, communication, meteorological and other fields, so as to meet the field power consumption and high reliability power supply demand. [0003] Currently, there are three main processes for producing synthesis gas from methane: steam methane reforming, part...

AI Technical Summary

Problems solved by technology

The former has the risk of explosion caused by the simultaneous introduction of oxygen and methane into the high-temperature reactor under high-temperature conditions, while the latter mainly realizes the chemical chain cycle to produce syngas through the different redox reactions of oxygen carriers in different reactors, and at the same time, through additional High-purity hydrogen products can only be obtained through the unique water vapor reaction process

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