Combustion reformer for high-temperature tail gas combustion and heat supply

Abstract

Disclosed is a combustion reformer adopting high-temperature tail gas combustion for heat supply. The combustion reformer is characterized by comprising a catalytic combustor and a reforming device, wherein the reforming device comprises a shell; a plurality of reforming pipes are vertically arranged in the shell in a circumferential direction; an upper gas collecting cavity and a lower gas collecting cavity for enabling reforming gas to uniformly flow the corresponding reforming pipes are arranged at the upper and lower ends of each reforming pipe in the shell respectively; a combusted tail gas outlet is formed in the top of the shell; the catalytic combustor comprises a perforated pipe; the perforated pipe is arranged in a cavity body, which is formed by the reforming pipes in a surrounding manner, in a penetration mode; the bottom of the catalytic combustor is connected with the shell through a quickly-assembled flange; an outer cavity of the perforated pipe is a catalytic combustion cavity filled with a catalyst; the catalytic combustion cavity is connected with the combusted tail gas outlet through surface holes; and a fuel gas inlet pipe and a pre-heating air inlet pipe, which are arranged at the bottom of the catalytic combustor, are connected with the inner cavity of the perforated pipe. The combustion reformer is reasonable and compact in structure, rapid and convenient to assemble, small in size, low in cost, and free of an igniting apparatus, so that the overall structure of the combustion reformer is greatly simplified; and meanwhile, uniform combustion is achieved, and the reforming conversion efficiency and the reforming handling capacity are effectively improved.

Description

technical field [0001] The invention relates to the technical field of fuel cells, and relates to a combustion reformer for high-temperature tail gas combustion and heat supply, which is used to reform methane to generate hydrogen and supply hydrogen to fuel cells. Background technique [0002] In fuel cell systems, hydrogen is generally used as an energy source for power generation. But hydrogen is not a primary energy source, and natural gas reserves are large. The most commonly used in industry is to use steam reforming of methane to produce hydrogen. [0003] Steam reforming of methane is a strong endothermic reaction, and the reaction temperature is generally above 600°C. Therefore, the requirements for heat sources are relatively strict, and high-grade heat is required. A high temperature environment and good heat transfer conditions are required. However, conventional burners generally burn in a cold state, and cannot use the calorific value of the exhaust gas. Mo...

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Problems solved by technology

This kind of reforming device is equipped with two preheating chambers, which can preheat the reformed gas, but it does not use high-temperature exhaust gas for combustion and heating, and the structure is more complicated, the assembly is troublesome and the manufacturing cost is relatively high.

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