Water treatment equipment and water treatment methods

By using a combination of hydrogen addition unit, catalyst tower and control unit in the ultrapure water production process, and by utilizing platinum group metal supported catalyst and measurement unit, the problem of managing dissolved hydrogen and oxidizing substances in ultrapure water is solved, and the low-cost production of high-quality ultrapure water is achieved.

CN118891233BActive Publication Date: 2026-05-26ORGANO CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ORGANO CORP
Filing Date
2023-01-23
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing technologies struggle to effectively manage dissolved hydrogen and oxidizing substances in ultrapure water production, resulting in poor ultrapure water quality and high costs.

Method used

A water treatment device is used, which includes a hydrogen addition unit, a catalyst tower and a control unit. Oxidizing substances are removed by a platinum group metal supported catalyst, and the dissolved hydrogen concentration is controlled by a measuring unit to ensure that the packing height of the catalyst tower is more than 10 cm, thereby achieving precise control of the amount of hydrogen added.

Benefits of technology

It has achieved low-cost production of high-quality ultrapure water with dissolved oxygen and dissolved hydrogen concentrations below 0.1 μg/L and hydrogen peroxide concentration below 1 μg/L, reducing equipment costs and maintenance expenses.

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Abstract

The present invention provides a water treatment apparatus, for example, used in the production of ultrapure water, comprising an oxidizing substance removal device (10) for removing oxidizing substances such as dissolved oxygen and hydrogen peroxide from the water to be treated. The oxidizing substance removal device (10) comprises: a hydrogen addition unit (12) for adding hydrogen to the water to be treated; a catalyst tower (11) filled with a platinum group metal supported catalyst at a height of 10 cm or more, and through which the water to be treated with added hydrogen is passed; a dissolved hydrogen meter (14) for measuring the dissolved hydrogen concentration in the outlet water of the catalyst tower (11); and a control unit (16) for controlling the amount of hydrogen added by the hydrogen addition unit (12) so that the measured value of the dissolved hydrogen meter (14) is within a first range.
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