JPS58164152A - Phosphoric acid feeding method for phosphoric acid type fuel cell - Google Patents

Abstract

PURPOSE:To feed the phosphoric acid liquid to matrix layers with unit cells kept horizontal by feeding the atomized phosphoric acid to the matrix layers through a fuel gas feed groove made of a plate having a current collecting function and fine holes between fuel electrode layers or water non-repellent sections with a blower. CONSTITUTION:The phosphoric acid aqueous solution 5 is put in a container 4, which is set on an atmizer including a supersonic vibration element or the like and is connected to a pipe 7. The phosphoric acid aqueous solution 5 is atomized by the atomizer 6 and is fed into a cell through pipes 7,3 by a blower 8. The mist-like phosphoric acid passes through the fuel gas feed manifold of the cell and is fed to a fuel gas feed groove 10 made of a carbon plate 2. The feed groove 10 is faced to a hydrogen electrode la of an electrode plate 1, and the hydrogen electrode la is formed with numerous fine holes or water non-repellent sections through which the phosphoric acid can reach a matrix layer 1b. The atomized phosphoric acid reach the matrix layer 1b through the fine holes or the water non-repellent sections.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for supplying phosphoric acid to a matrix layer in a phosphoric acid fuel cell.

In a phosphoric acid fuel cell, when supplying phosphoric acid to the matrix layer that holds phosphoric acid, a single layer is used in which the electrode plate, the reactant gas supply, and the carbon layer of the system can are laminated. After forming a predetermined number of cells into a noge block shape, there is a method in which a phosphoric acid solution is pumped into the matrix through the fuel gas supply groove of the carbon fiber and the narrow size of the hydrogen electrode catalyst layer, or a matrix layer is placed on the hydrogen electrode or air electrode. It is possible to adopt a method of holding the matrix layer and impregnating it with phosphor. However, while driving locally,
If it is necessary to replenish phosphoric acid for some reason, the above-mentioned method cannot be used and it is necessary to disassemble the device and replenish it. However, this involves -1, so it is not possible to supply the violet in the same assembled state as in the operating state.
I am desired.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method that can supply a phosphoric acid solution to a matrix layer until the unit cell is removed.

$111!11 shows an embodiment of this invention.

In this actual JII example, the S-family battery has an electrode plate l and a carbon plate, usually referred to as a bipolar plate or a lipped porous plate
It is formed by stacking a predetermined number of single cells obtained by multiplying 2 by 2. Normally, during operation, the pipe 3 is connected to the fuel gas supply system. When replenishing phosphoric acid at the production site 4, at the platform for supplying phosphoric acid or at the local operation site, fill the container 41 with the phosphoric acid aqueous solution 5 and place it in the ultrasonic a
The container 44 is set in the mist generating device 6 including an m-movement element, etc.
Connect this pipe 7. On one side of Paigua is a sending IK machine 8.
The other end of the pipe 7 is connected to the gas supply pipe 3. - The aqueous phosphoric acid solution 5 is atomized by the generator 6 and sent by the blower 8 through the pipe 7.3 into the cell. The atomized phosphoric acid passes through the cell's fuel gas supply manifold and is sent to Carbon&2's fuel gas supply #1110. This supply line 10 faces the hydrogen electrode 1m of the electrode plate l, and this hydrogen electrode 1m has a matrix layer 1b.
There are countless #111yc or non-water repellent areas that can be reached by pirates. Therefore, the atomized phosphoric acid creates these narrow or non-water repellent areas and reaches the matrix layer 1b. At this time, the battery is heated to a temperature at which water evaporates, so phosphorus is removed.
- and the water evaporates. Once the phosphoric acid is replenished as required, the pipe 7.4 generator 6. Container 5. Air blower 8 is inside Sushi-no-1-3 rather than pipe 3.

1 m, matrix lb and air area pole IC to l
C area is fuel gas and 9. , a gas starts power generation. The air gas 3 is sent from a supply system (not shown) to the air gas supply W411 of the carbon plate.

As described above, according to the present invention, since the phosphoric acid RGM liquid is atomized and supplied to the matrix layer by a blower, it is possible to easily replenish phosphoric acid when it is necessary to replenish the phosphoric acid at the hermitage during operation 8. It has the advantage of being

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the main part of an embodiment of the present invention. 1 is an electrode plate, 1a is a hydrogen electrode, 1b is a matrix layer,
lc is g! , A electrode, 2 a carbon plate, 4 a phosphor separation bath liquid container, 8 a blower, and IO a fuel gas supply line. \

Claims (1)

[Claims] A unit cell consisting of a matrix layer that holds phosphoric acid, a fuel electrode and an air electrode that have small holes or non-water repellent areas that allow phosphoric acid to reach the matrix layer has the function of supplying reaction gas and collecting current. In a fuel cell stacked with plates interposed in between, the phosphoric acid is fed by a blower through the fuel gas supply grooves of the plates and through the fine holes in the electrodes or through the non-water repellent parts. A method for replenishing phosphoric acid in a phosphoric acid fuel cell, characterized by supplying phosphoric acid to a matrix layer.