Dilute Solution Dosing with Degassing for Stable Pump Discharge
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Solution Overview
Problem
Existing systems face issues with pumps clogging due to bubble accumulation when adding easily vaporizable conductivity- or oxidation-reduction potential-regulating substances to ultrapure water, leading to inconsistent discharge and concentration of dilute solutions.
Innovation Solution
A dilute solution production apparatus equipped with a degassing mechanism and control system that operates when water quality or flow rate deviations are detected, using a conductivity meter, resistivity meter, or oxidation-reduction potential meter to adjust a degassing valve and restore stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a pump is used to add a second liquid containing easily vaporizable substances (conductivity-imparting or oxidation-reduction potential regulating substances) to ultrapure water, then the dilute solution can be produced, but bubbles of the substance accumulate in the pump causing clogging and inconsistent discharge
Solution Approach 1:
The patent applies preliminary action by providing a degassing mechanism that operates before the pump to remove bubbles from the second liquid. The degassing mechanism includes a degassing pipe connected to the second liquid supply line, allowing bubbles to be removed in advance before the liquid enters the pump, thereby preventing bubble accumulation and ensuring consistent pump discharge.
2Manufacturing precision
If the pump operates at extremely low flow rate to achieve trace amount addition, then the dilute solution concentration can be controlled, but the pump becomes vulnerable to clogging by bubbles
Solution Approach 1:
The degassing mechanism operates in advance to remove bubbles from the second liquid before it enters the pump, ensuring that even at extremely low flow rates required for precise concentration control, the pump remains free from bubble clogging and operates reliably.
3Device complexity
If no degassing mechanism is provided, then the system remains simple, but bubbles accumulate in the pump causing variable discharge amount and inconsistent water quality
Solution Approach 1:
The patent introduces a degassing mechanism that performs bubble removal in advance in the second liquid supply line before the liquid reaches the pump. This preliminary degassing action ensures consistent pump discharge and reliable dilute solution production, with the added benefit that the degassed liquid can be returned to the storage tank for reuse.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures stable supply of dilute solutions with specified concentrations by effectively managing gas accumulation in pumps, maintaining consistent discharge and solution quality over extended periods.
Implementation Method 1
a water quality detector composed of a conductivity meter, a resistivity meter, or an oxidation-reduction potential meter
Implementation Method 2
a water quality detector composed of a conductivity meter, a resistivity meter, or an oxidation-reduction potential meter
Implementation Method 3
a water quality detector composed of a conductivity meter, a resistivity meter, or an oxidation-reduction potential meter
Implementation Method 4
a degassing mechanism extending from the pump... operating the degassing mechanism when a water quality detection value of the water quality detector varies by a predetermined value or more
Data Source
AI summary
A dilute solution production apparatus produces a dilute solution of a second liquid containing at least one of a conductivity-imparting substance and an oxidation-reduction potential regulating substance by adding the second liquid to a first liquid, and is provided with: a first pipe through which the first liquid flows; a pump for adding the second liquid into of the first pipe via a second pipe; a degassing pipe which extends from the pump; a water quality sensor which is composed of a conductivity meter, a resistivity meter or an oxidation-reduction potential meter; and a control device for opening a degassing valve when a water quality detection value in the water quality sensor varies by a predetermined value or more.