Novel high-efficiency fuel cell humidifier

Abstract

The invention relates to a novel high-efficiency Nafinon tube humidifier which heats and humidifies raw material gas with a tail gas of a fuel cell. The humidifier comprises a Nafion tube bundle, a shell, an end cap, a seal ring, fixed screws and the like, wherein the Nafion tube bundle is a major humidifying unit fixed in the shell with the end cap and the seal ring to form a tube layer and a shell layer and moisture balance is formed between the two layers. Compared with the conventional humidifier technology used by the fuel cell, the humidifier provided by the invention has the advantages of good humidification effect, easy sealing, no maintenance, simple manufacturing, low cost and the like.

Description

Technical field: [0001] The invention relates to a new method for humidifying gas, in particular to a method for humidifying and warming the intake air of a proton exchange membrane fuel cell. Background technique: [0002] Proton exchange membrane fuel cell is a kind of perfluorosulfonic acid type solid polymer membrane as electrolyte, platinum / carbon or platinum-ruthenium / carbon as electrocatalyst, which can convert hydrogen and oxidant into electrical energy and other reaction products through electrochemical reaction The device is composed of a membrane electrode, a conductive plate, etc., where the membrane electrode is the place where the fuel and the oxidant react, and is composed of carbon paper, a catalyst and a proton exchange membrane. At the anode, hydrogen molecules lose electrons and become protons, and the protons pass through Electromigration across the proton exchange membrane to the cathode. According to the conductive principle of the perfluorosulfonic ac...

AI Technical Summary

Problems solved by technology

[0004] One is the bubbling method, which uses resistance wire to heat deionized water, and at the same time introduces hydrogen or fuel gas to bring out the water vapor to achieve the purpose of humidifying and heating the gas. This method is bulky and requires additional energy for heating, and additional water is required , it is very inconvenient to use and maintain, and most of them can only be used on fixed test benches

[0005] The second is to use the proton exchange membrane to process the humidifier into the structural form of the fuel cell stack. One side passes water and the other side passes reaction gas. This humidification method also has the disadvantages of too large volume, too small effective use area, low efficiency, and additional water is required. , high processing costs and other disadvantages

[0006] The third is to use a ceramic micropore to absorb moisture and heat to make a ceramic drum, also known as an enthalpy wheel humidifier. In the case of rotation, the tail gas and raw material gas enter and pass through the two sides of the humidifier respectively, so that the raw material The gas is heated and humidified. This method is not suitable for sealing and needs to be driven by an additional motor. The air permeability is too high, which affects the utilization rate of raw gas, and cannot be used on the hydrogen side.

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