Composite combustion reactor, fuel cell system and multiple combustion method thereof

Abstract

The invention provides a combination combustion reactor, a fuel cell system and a multiplex combustion method thereof. The combination combustion reactor comprises a shell, a premixing cavity positioned on the top of the shell, a catalytic combustion cavity positioned on the lower layer of the premixing cavity, a fire insulation cavity positioned on the lower layer of the catalytic combustion cavity, and a combustion cavity positioned on the lower layer of the fire insulation cavity, wherein the premixing cavity is used for mixing positive pole and negative pole tail gas; the catalytic combustion cavity is used for carrying out a catalytic reaction or a combustion reaction on introduced gas; the fire insulation cavity is used for protecting the catalytic combustion cavity; and the combustion cavity is used for carrying out the combustion reaction. When the fuel cell system is started, fuel is stably combusted on the down stream of the fire insulation cavity after being sufficiently mixed with air; and when the system operates normally, after fuel with low combustible ingredients is mixed with air with low oxygen content to be catalyzed, an oxidation reaction occurs. An open fire combustion reaction is integrated with a catalytic combustion reaction, and enormous demands on the applicable range of combustors caused by the ingredient change of tail gas of the fuel cell system under different operation conditions can be met, so that the integration level and energy utilization efficiency of the whole system are greatly improved.

Description

Technical field [0001] The present invention relates to the field of combustion, and particularly to a composite combustion reactor, a fuel cell system and method of multiplexing combustion. Background technique [0002] The fuel cell power generation system is a new generation device, a fuel stored chemical energy efficient, environmentally friendly chemical energy into electrical energy power generation device. [0003] The fuel cell power generation system as the energy from the chemical energy of fuel into electrical and thermal energy conversion device of high efficiency, pollution, etc., it has become an important energy converting one of the most promising tool. [0004] A typical fuel cell cogeneration system includes a fuel processing system, fuel cell power generation system of the body, the alternating current direct conversion systems, heat recovery systems, the required equipment includes a compressor, a steam generator, a reformer, a burner and a heat exchanger Wait...

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Problems solved by technology

[0007] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a composite combustion reactor, a fuel cell system and a multiplexed combustion method thereof, which are used to solve the system problems caused by the separate work of the two combustion reactors in the prior art. Complicated and prone to structural interference with other components in the system, resulting in difficulties in optimal control and high system costs

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