Hydrogen fuel cell tail gas aftertreatment device based on catalysis and micro-combustion

Abstract

The invention provides a hydrogen fuel cell tail gas aftertreatment device based on catalysis and micro-combustion. The hydrogen fuel cell tail gas aftertreatment device comprises a hydrogen production device, a hydrogen fuel cell, a tail gas filtering device, a gas premixing chamber, a gas concentration monitoring control system, an automatic ignition system and a micro-combustion chamber. A tailgas outlet of the hydrogen fuel cell is sequentially connected with a tail gas filtering device, a gas premixing chamber and a micro-combustion chamber in series through pipelines, and the tail gas filtering device is used for gas-liquid separation; the gas premixing chamber is connected with the hydrogen production device, and the gas concentration monitoring control system controls the hydrogenproduction device to supplement hydrogen to the gas premixing chamber according to the hydrogen concentration of an outlet of the gas premixing chamber. An ignition device is arranged in the micro-combustion chamber, and the automatic ignition system controls the ignition device to ignite according to the temperature in the micro-combustion chamber; and the micro combustion chamber is externallyconnected with power equipment or a power generation system. According to the invention, the efficient utilization of hydrogen, oxygen and heat in tail gas can be realized.

Description

technical field [0001] The invention relates to the field of hydrogen fuel cell tail gas treatment or the field of micro-combustion, in particular to a hydrogen fuel cell tail gas after-treatment device based on catalysis and micro-combustion. Background technique [0002] A hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. The basic principle is as follows. The battery contains two electrodes, positive and negative. Hydrogen gas enters from the anode, undergoes an oxidation reaction through the action of a catalyst, loses electrons, and becomes hydrogen ions. Oxygen (or air) enters from the cathode to attract the protons produced by the anode, and the electrons reach the cathode through an external circuit to form an electric current. Water is the only emission of the hydrogen fuel cell. [0003] At present, in order to make the fuel cell work stably, the air oxidant and hydrogen fuel p...

AI Technical Summary

Problems solved by technology

However, using heat to humidify the anode exhaust gas does not directly use energy, and the energy conversion efficiency is low

In addition, the oxygen in the cathode tail gas is directly discharged into the atmosphere without being utilized, resulting in a waste of energy

In addition, the device of this scheme is relatively complicated, including gas mixer, heating humidifier, heating humidifier, water storage chamber, heat exchange tube, mass flow meter, mass flow sensor, controller, heating rod, etc. After the hydrogen in the tail gas is separated and heated and humidified, the recovered hydrogen is mixed with the humidified gas and hydrogen in the gas mixer, which increases the complexity of the structure and increases the cost

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