Fuel cell hydrogen recovery device

Abstract

The invention relates to a fuel cell hydrogen recovery device. The fuel cell hydrogen recovery device comprises a fuel cell, a controller, a hydrogen recovery pipe provided with a hydrogen circulatingpump and a stop valve, an air inlet pipe connected with the fuel cell, an air exhaust pipe connected with the fuel cell, a hydrogen inlet pipe provided with a hydrogen inlet valve and a hydrogen exhaust pipe provided with a exhaust outlet valve, and the hydrogen recovery pipe is connected with the hydrogen inlet pipe. The fuel cell hydrogen recovery device is characterized in that the fuel cell hydrogen recovery device further comprises an integrated type gas-liquid separation storage tank, an gas-liquid separation storage tank is integrally formed by a storage tank on the upper part and a gas-liquid separation separator on the lower part, the storage tank is correspondingly connected with the hydrogen exhaust pipe and the hydrogen recovery pipe, and the gas-liquid separation separator discharges waste water and redundant nitrogen through a waste discharging pipe provided with a waste discharging valve. Compared with the prior art, the fuel cell hydrogen recovery device has the advantages of exhaust gas buffering, effective cooling, uniform and safe exhaust, noninterference of discharging liquid water and hydrogen and the like.

Description

technical field [0001] The invention relates to the field of fuel cell system control, in particular to a fuel cell hydrogen recovery device Background technique [0002] As a new type of environmentally friendly power generation product, fuel cells have the advantages of no noise, no pollution, small size, long life, high energy conversion rate, easy maintenance and low cost. [0003] A hydrogen fuel cell is a device that converts hydrogen and oxidants into electrical energy and reaction products. In a proton exchange membrane fuel cell using hydrogen as fuel and air containing oxygen as oxidant (or pure oxygen as oxidant), the catalyzed electrochemical reaction of fuel hydrogen in the anode region produces positive hydride ions (or protons). The proton exchange membrane facilitates the migration of positive hydride ions from the anode region to the cathode region. In addition, the proton exchange membrane separates the hydrogen-containing fuel gas stream from the oxygen-...

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Problems solved by technology

[0005] The current feasible solution is to discharge the water generated inside the fuel cell directly to the outside of the fuel cell by using excess air, but it is not feasible to discharge the water in the anode area of ​​the fuel cell to the outside of the fuel cell by using excess fuel hydrogen, so Not only will the precious fuel hydrogen be wasted, but the direct discharge of exhaust gas containing excess hydrogen is very dangerous

[0006] Chinese patent CN204793044U discloses a fuel cell hydrogen recovery system, which includes a fuel cell, a hydrogen inlet valve, a hydrogen outlet valve, a hydrogen circulation pump, a shut-off valve, a container, an air compressor, a drain solenoid valve, a hydrogen inlet pipe, and a hydrogen outlet pipeline, air inlet pipeline and air exhaust pipeline; the hydrogen inlet valve is placed on the hydrogen inlet pipeline, the hydrogen outlet valve is placed on the hydrogen outlet pipeline, and the outlet of the hydrogen outlet valve is connected with the inlet of the hydrogen circulation pump and the upper port of the container at the same time, The outlet of the hydrogen circulation pump is connected to the inlet of the shut-off valve, the outlet of the shut-off valve is connected to the hydrogen inlet pipe between the hydrogen inlet valve and the fuel cell, the air compressor is placed on the air inlet pipe of the fuel cell, and the drain solenoid valve is placed in the container However, in a control cycle, every time the hydrogen outlet valve is opened, the circulation pump and the shut-off valve must be opened correspondingly. If the operation is too frequent, the service life of the solenoid valve will be reduced and there will be leakage of multiple operations. Risk, and the exhaust gas discharged in this way is not uniform, and there are also safety risks

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