Cleaning agent, cleaning method of water treatment apparatus, and cleaning method of silica-based scale
AssigneeKurita Water Industries Ltd.
InventorsJack Mueller, Sara Jaffarian
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Abstract
The disclosure provides a silica-based scale cleaning technology. The disclosure can provide a cleaning agent of a silica-based scale, containing a silicic acid compound. The disclosure can also provide a cleaning method of a water treatment apparatus, including: using a solution containing a silicic acid compound. Further, the disclosure can provide a cleaning method of a silica-based scale, including: using an agent containing a silicic acid compound for a water system.
Claims10
A cleaning method of a water treatment apparatus for removing a silica-based scale in a water system, comprising:
- using a solution containing a silica-based scale cleaning agent that contains a silicic acid compound, or
- using a solution containing a silicic acid compound,
- wherein the solution is adjusted to have a pH of 10 or more, and
- the solution contains the silicic acid compound in an amount of 1,000 to 20,000 mg/L in terms of the total silica content, or the solution is added to water to be treated in the water treatment apparatus to adjust the water to be treated to have a concentration of 1,000 to 20,000 mg/L in terms of the total silica content, and
- the solution is adjusted to have a temperature of 50° C. or lower.
A cleaning method of a silica-based scale, comprising:
- using an agent containing a silicic acid compound in a water system, and the agent containing the silicic acid compound is a solution,
- wherein the water system is adjusted to have a pH of 10 or more, and
- the agent contains the silicic acid compound in an amount of 1,000 to 20,000 mg/L in terms of the total silica content, or the agent is added to water to be treated in the water system to adjust the water to be treated to have a concentration of 1,000 to 20,000 mg/L in terms of the total silica content, and
- the solution is adjusted to have a temperature of 50° C. or lower.
Dependencies are inferred from the claim text.