Flame tube air inlet method of solid oxide fuel cell system and combustion chamber of solid oxide fuel cell system

Abstract

The invention relates to a flame tube gas inlet method of a solid oxide fuel cell system, anode tail gas of a galvanic pile enters a flame tube from the head of the flame tube in a rotational flow mode, and cathode tail gas of the galvanic pile enters the flame tube in the following mode: 1) entering the flame tube from side wall through holes distributed in the side wall of the flame tube; (2) entering the flame tube from end wall through holes distributed in the head end wall of the flame tube; and (3) the tail gas enters the flame tube from the head of the flame tube in a rotational flow mode, and the cathode tail gas entering the flame tube in the rotational flow mode wraps the anode tail gas entering the flame tube in the rotational flow mode in the gas inlet direction. The invention further relates to the combustion chamber adopting the method. By means of rotational flow flame stabilization, flame multi-point arrangement, anode tail gas collection and distribution, unique distribution of the side wall through holes and the end wall through holes and the like, stable combustion of the combustion chamber under the conditions that gas composition changes are complex, residual gas coefficients are variable and the combustion heat value is extremely low is achieved, and the temperature distribution of an outlet of the combustion chamber is uniform.

Description

technical field [0001] The invention relates to a flame cylinder air intake method of a solid oxide fuel cell system and a combustion chamber thereof, belonging to the technical field of solid oxide fuel cells. Background technique [0002] Solid Oxide Fuel Cell (Solid Oxide Fuel Cell, referred to as SOFC) belongs to the third-generation fuel cell, which is an all-solid-state device that directly converts the chemical energy stored in fuel and oxidant into electrical energy in an efficient and environmentally friendly manner at medium and high temperatures. The chemical power generation device is the one with the highest theoretical energy density among several fuel cells. SOFC has the advantages of wide fuel adaptability, high energy conversion efficiency, and near zero pollution. Its power conversion efficiency can reach more than 65%. It is widely used as a fixed power station in civil fields such as large-scale centralized power supply, medium-sized power distribution, ...

AI Technical Summary

Problems solved by technology

At present, most of the combustion organization methods used in SOFC systems are catalytic combustion or porous media premixed combustion. Catalytic combustion requires expensive catalysts and has a limited service life; , the shock and vibration resistance is extremely poor, and the long-term service life is limited. In addition, the pressure loss is too large, which will affect the overall working stability of the system

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