Heating starting method and heating device of solid oxide fuel cell stack

Abstract

The invention provides a heating starting method and a heating device of a solid oxide fuel cell stack. According to the method, fuel gas and air are preheated and then introduced into the galvanic pile to achieve the purpose of heating the galvanic pile; the problem that the inside and the outside of the electric pile are heated unevenly when the electric pile is heated by an electric heating furnace is solved, and preheated fuel gas and air are directly introduced into a three-phase boundary reaction area in the electric pile, so that the heating efficiency is high, the heating is balanced,and the electric pile has good, stable and adjustable electric output performance.

Description

technical field [0001] The invention belongs to the technical field of solid oxide fuel cells, and in particular relates to a heating and starting method and a heating device for a solid oxide fuel cell stack. Background technique [0002] As a clean and efficient new energy power generation device, the development and utilization of solid oxide fuel cells is of great significance to the solution of today's environmental and energy problems. [0003] Due to the high working temperature of the stack in the solid oxide fuel cell, a preheating start-up process is required for the stack from room temperature to the required working temperature. The current related technology mainly heats the stack by placing it in an electric furnace. This heating method is mainly through The furnace radiates heat to the outer surface of the battery, and then transfers the heat to the inside of the battery through heat conduction. After a series of radiation conduction processes, the inside of t...

AI Technical Summary

Problems solved by technology

[0003] Due to the high working temperature of the stack in the solid oxide fuel cell, a preheating start-up process is required for the stack from room temperature to the required working temperature. The current related technology mainly heats the stack by placing it in an electric furnace. This heating method is mainly through The furnace radiates heat to the outer surface of the battery, and then transfers the heat to the inside of the battery through heat conduction. After a series of radiation conduction processes, the inside of the stack, such as figure 1 Only the three-phase interface reaction area shown can reach the required temperature. The three-phase interface refers to the anode, electrolyte, and fuel gas interface of the solid oxide fuel cell, or the cathode, electrolyte, and air interface, so there is The heating efficiency is low, and the heating of the batteries in the stack is uneven; secondly, the gas that is not preheated or not fully preheated during the reaction may reduce the temperature of the reaction area, thereby reducing the reaction efficiency of the battery; When the stack discharges, it will generate heat inside itself, causing the actual working temperature of the stack to be higher than the set ambient temperature of the electric furnace, which will easily cause the stack to rupture due to the temperature difference between the inside and outside.

Images