CN201229963Y - Device for reducing residual hydrogen in tail gas emission of fuel cell - Google Patents

Abstract

The device for reducing residual hydrogen in tail gas emission of fuel cell is formed from high-temp. resistant porous catalytic material placed in the catalytic box body, hydrogen tail gas distributing pipe, miniature fan fuel cell and fan, on the wall of the catalytic box body a hydrogen inlet, an air inlet and a discharge outlet are set, the external end of hydrogen inlet and internal end of hydrogen inlet are respectively connected with hydrogen tail pipe of fuel cell and hydrogen inlet of miniature fan fuel cell in the box, the air inlet and discharge outlet are communicated with external atmosphere, the fan is mounted in the air inlet, the high-temp. resistant porous catalytic material is placed in the discharge outlet, the miniature fan fuel cell is placed between the fan and high-temp. resistant porous catalytic material, the hydrogen tail pipe of miniature fan fuel cell is connected with hydrogen tail gas distributing pipe with small hole, and the fan is powered by miniature fan fuel cell. The utility model has the advantages that: the device is modularized, does not need an external power supply, and has simple structure, easy manufacture and stable and reliable operation.

Description

A device for reducing residual hydrogen in fuel cell exhaust emissions

technical field

The utility model relates to the field of fuel cells, in particular to a treatment device for residual hydrogen in the tail gas discharge of a proton exchange membrane fuel cell.

Background technique

In the existing proton exchange membrane fuel cell system, the exhaust gas contains unreacted hydrogen. Although the tail emissions of hydrogen are small, the concentration is high. Since hydrogen is a flammable and explosive gas, it is easy to explode with oxygen in the air at a certain concentration. Therefore, from a safety point of view, safe discharge can only be achieved after treatment. There is no special device for treating the tail gas of proton exchange membrane fuel cells in the prior art.

Contents of the invention

The purpose of the utility model is to provide a treatment device for the residual hydrogen in the exhaust gas of the fuel cell.

The technical scheme of the utility model is: a device for reducing residual hydrogen in fuel cell tail gas discharge, which is composed of a catalytic box, a high-temperature-resistant porous catalytic material, a hydrogen tail gas distribution pipe, a micro-fan fuel cell and a fan, and its structure is as follows: The high-temperature-resistant porous catalytic material, hydrogen tail gas distribution pipe, micro-fan fuel cell and fan are installed in the catalytic box, and the wall of the catalytic box body is provided with a hydrogen inlet, an air inlet and an outlet, and the outer end of the hydrogen inlet is connected to the outer end of the hydrogen inlet. The fuel cell hydrogen exhaust pipe is connected, the inner end of the hydrogen inlet is connected to the hydrogen inlet of the fuel cell with a micro fan installed in the box, the air inlet and outlet are connected to the outside atmosphere, the fan is installed at the air inlet, and the high temperature resistant porous The catalytic material is placed at the exhaust outlet, and the micro-fan fuel cell is arranged between the fan and the high-temperature-resistant porous catalytic material. The power cord of the fan is connected with the power output end of the micro-fan fuel cell.

The utility model relates to a device for reducing residual hydrogen in fuel cell tail gas emissions, which is characterized in that the catalytic box is made of thin plates, and the box body is made into a rectangle or a circle as required.

The utility model relates to a device for reducing residual hydrogen in fuel cell tail gas emission, the structure of which is that the high-temperature-resistant porous catalytic material is a catalytic material composed of platinum supported on cordierite.

The utility model relates to a device for reducing residual hydrogen in the tail gas discharge of fuel cells, the structure of which is that the micro-fan fuel cell is a self-starting low-power fuel cell.

The working principle of the utility model is: the fuel cell hydrogen exhaust pipe is connected to the micro-fan fuel cell in the catalytic box, the micro-fan fuel cell consumes a part of the hydrogen in the fuel cell tail row, the power generation drives the fan to rotate, and the micro-fan fuel cell consumes a part of the fuel cell After the hydrogen in the tail row generates power, the remaining hydrogen is discharged from the tail outlet of the micro-fan fuel cell, and the fan blows the residual hydrogen in the tail exhaust of the micro-fan fuel cell to the catalytic material, and the oxygen in the air is under the action of the catalyst. The reaction produces water and heat and is discharged.

The utility model has the advantages that the device is modularized, no external power supply is needed, the structure is simple, the manufacture is easy, and the operation is stable and reliable.

Description of drawings

The utility model has 1 piece of accompanying drawing, is the utility model structural representation.

In the attached drawings: 1. Catalytic box, 2. High-temperature-resistant porous catalytic material, 3. Hydrogen tail gas distribution pipe, 4. Micro-fan fuel cell, 5. Fan, 6. Air inlet, 7. Hydrogen inlet, 8. Exhaust exit.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described. As shown in the figure, this embodiment is used for the treatment of fuel cell exhaust gas on fuel cell vehicles. The catalytic box 1 is a rectangular box, the top wall of the catalytic box is provided with a hydrogen inlet 7, the hydrogen inlet 7 is connected to the hydrogen exhaust pipe of the fuel cell through a pipe connector, and the air inlet 6 and the exhaust port 8 are set in the box. On the two opposite side walls, the air inlet 6 and the outlet 8 are directly communicated with the outside atmosphere. The box at the outlet 8 is filled with a high-temperature-resistant porous catalytic material 2, and the high-temperature-resistant porous catalytic material 2 is a catalytic material composed of platinum supported on cordierite. The fan 5 is installed at the air inlet 6, and the micro-fan fuel cell 4 is a group of self-starting low-power fuel cells, which are arranged between the fan 5 and the high-temperature-resistant porous material 2 . The power supply of the fan 5 is provided by the micro-fan fuel cell 4, the hydrogen inlet of the micro-fan fuel cell 4 is connected with the inner end of the hydrogen inlet 7 on the catalytic box body, and the exhaust port of the micro-fan fuel cell 4 is connected with the hydrogen exhaust distribution pipe 3 , The hydrogen tail gas distribution pipe 3 is uniformly provided with small holes.

The working process of this embodiment is: the hydrogen in the fuel cell exhaust pipe enters the micro-fan fuel cell (4) in the catalytic box (1) through the hydrogen inlet on the catalytic box body, and the micro-fan fuel cell (4) consumes a part of fuel The hydrogen in the battery exhaust is generated to drive the fan (5), and the remaining hydrogen is released from the hydrogen exhaust distribution pipe by the hydrogen exhaust port of the micro fan fuel cell. The fan (5) drives air through the air flow field of the micro-fan fuel cell, and at the same time, blows the hydrogen tail gas released from the hydrogen tail gas distribution pipe (3) of the micro-fan fuel cell (4) onto the high-temperature-resistant multi-cavity catalytic material (2) Under the action of the catalyst in the catalytic material, the hydrogen in the hydrogen tail gas reacts with the oxygen in the air to generate water and heat, which are then discharged from the catalytic box (1) through the outlet.

Claims (4)

1. A device for reducing residual hydrogen in fuel cell exhaust emissions, consisting of a catalytic box (1), a high-temperature-resistant porous catalytic material (2), a hydrogen tail gas distribution pipe (3), a micro-fan fuel cell (4) and a fan ( 5) Composition, characterized in that: the high-temperature-resistant porous catalytic material (2), the hydrogen tail gas distribution pipe (3), the micro-fan fuel cell (4) and the fan (5) are installed in the catalytic box (1), The wall of the catalytic box body is provided with a hydrogen inlet (7), an air inlet (6) and an outlet (8), and the outer end of the hydrogen inlet (7) is connected with the fuel cell hydrogen exhaust pipe, and the hydrogen inlet (7) The inner end of the box is connected with the hydrogen inlet of the micro-fan fuel cell (4) contained in the box, the air inlet (6) and the outlet (8) communicate with the outside atmosphere, and the fan (5) is installed at the air inlet (6), The high-temperature-resistant porous catalytic material (2) is placed at the outlet (8), the micro-fan fuel cell (4) is arranged between the fan (5) and the high-temperature-resistant porous catalytic material (2), and the micro-fan fuel cell (4 ) is connected to the hydrogen tail gas distribution pipe (3), the hydrogen tail gas distribution pipe (3) is uniformly provided with small holes, and the power line of the fan (5) is connected to the power output end of the micro fan fuel cell (4) . 2. A device for reducing residual hydrogen in fuel cell exhaust emissions according to claim 1, characterized in that the catalytic box (1) is made of thin plates, and the box body is made into a rectangle or a circle as required. 3. A device for reducing residual hydrogen in fuel cell exhaust emissions according to claim 2, characterized in that the high temperature resistant porous catalytic material (2) is a catalytic material composed of platinum supported on cordierite. 4. A device for reducing residual hydrogen in fuel cell exhaust emissions according to claim 3, characterized in that said micro-fan fuel cell (4) is a self-starting low-power fuel cell.

Images