Exhaust processing method and apparatus for safety dumping of fuel cell automobile hydrogen gas

Abstract

The invention discloses a tail gas buffer dilution treatment method for safe emission of hydrogen from a fuel cell vehicle and a device thereof. The device comprises a hydrogen buffer, a flow control valve, a draining valve, a flame arrester, an earth terminal, an emergency hydrogen exhaust valve, a hydrogen sensor and a control module. The pulse hydrogen emitted from an anode side of the fuel cell is firstly buffered by the buffer, and a small stream of air introduced from an air path emitted from the cathode side dilutes and sweeps the hydrogen in the buffer; then the diluted hydrogen emitted from the buffer and the gas from a main air pipeline are mixed, thus the volume concentration of the tail hydrogen emitted from the fuel cell vehicle is controlled below the explosion limit concentration 4%, and the purified water discharged from a condenser can be recycled. The tail gas buffer dilution treatment device utilizes the techniques of self-diffusion, multi-tube pass buffer, air mixing and exchange, expansion, condensation and the like to buffer and dilute the hydrogen-containing tail gas emitted from the fuel cell vehicle and separate the water and gas in the hydrogen-containing tail gas, thus eliminating the possible fire hazard and ensuring the safe running of the fuel cell vehicle.

Description

technical field [0001] The invention relates to a buffer dilution treatment device capable of performing buffer dilution treatment on hydrogen tail gas discharged by a fuel cell vehicle and controlling the concentration of hydrogen in the tail gas discharged by the fuel cell vehicle within a safe range. Background technique [0002] A fuel cell is a power generation device that directly converts chemical energy stored in fuels (such as hydrogen) and oxidants into electrical energy in an efficient and environmentally friendly manner. It is a new type of green energy technology. Fuel cell vehicles powered by proton exchange membrane fuel cells have the characteristics of quietness, high efficiency, and zero pollution. At the same time, they have a longer driving range than pure electric vehicles powered by batteries. Based on the above advantages, people Fuel cell vehicles have carried out active research and made great progress. At present, many automobile manufacturers have ...

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Problems solved by technology

[0005](2) When the fuel cell system works for a long time, a certain amount of impurity gas will accumulate in the hydrogen due to a large amount of hydrogen input and long-term circulation

How thi...

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