Pure water purification device for fuel cell power generation system

Abstract

The invention provides a pure water refining device of a fuel cell power generation system, which can realize water retention of the purified pure water. The pure water purification device has: a cylindrical storage tank with a bottom; a cover body that watertightly closes the upper opening of the storage tank; The upper space is formed between the upper filter and the cover; the lower filter is arranged at the lower part of the storage space, and the lower space is formed between the lower filter and the bottom plate of the storage tank; the water pipe runs through the upper filter and a lower filter to communicate the upper space with the lower space; and an ion exchange resin filled in the space defined by the storage tank, the upper filter, the lower filter, and the water pipe. A water supply pipe for supplying water to the upper space is formed on the cover, and an overflow pipe connected to the water pipe is provided, and the lower space is connected to a water supply pipe for discharging pure water in the storage tank to the outside.

Description

technical field [0001] The present invention relates to a pure water purification device of a fuel cell power generation system for purifying water generated by power generation in a fuel cell into pure water. Background technique [0002] A fuel cell generates electrical energy by electrochemically reacting a fuel gas and an oxidant gas. As the fuel gas supplied to the fuel cell, hydrogen gas obtained by steam reforming a hydrocarbon-based raw fuel is used. [0003] In the steam reforming, it is necessary to supply water in an amount corresponding to the steam used in the reforming reaction to the reformer. Although there is also a method of supplying this water from the outside, attention is paid to the method of using the water contained in the exhaust gas generated by power generation in the fuel cell as the water required for the reforming and making it cycle. In a fuel cell power generation system utilizing the latter method, condensed water obtained by recovering m...

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Problems solved by technology

[0008] As described above, in each of the devices of Patent Document 1 and Patent Document 2, the condensed water is purified by passing from bottom to top between the ion exchange resins, and pure water is discharged from the upper port, so there is no use in the inside of the device. In the space for storing pure water

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