Ozone Dissolution System with Bleed-Off for High Concentration
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Solution Overview
Problem
Conventional systems for dissolving gases in liquids, particularly ozone in water, are limited in achieving high and controlled dissolved ozone concentrations, leading to inefficient water treatment and increased costs due to lower pressure and less-efficient gas transfer.
Innovation Solution
A system with a pressure vessel and bleed-off mechanism that regulates gas headspace to maximize ozone dissolution by continuously or periodically removing excess oxygen, allowing for higher ozone concentrations in the liquid, utilizing an ozone generator to maintain optimal pressure and flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional bubble diffusion or Venturi injection systems are used to dissolve gas in liquid, then contact time or surface area between gas bubbles and liquid is increased, but the dissolved gas concentration remains limited and operational costs increase
Solution Approach 1:
The system changes the pressure parameter by pressurizing the gas headspace to 2-10 atm, which dramatically increases the dissolved gas concentration according to Henry's Law. This parameter change resolves the contradiction by enabling high dissolved gas concentration (up to 50 mg/L) without requiring extended contact times or large surface areas, thus maintaining high treatment efficiency
Solution Approach 2:
The system performs preliminary action by pre-pressurizing the gas headspace with ozone-oxygen mixture before liquid contact occurs. The bleed-off mechanism also performs preliminary removal of excess oxygen, enriching the headspace with ozone. This preliminary preparation enables maximum dissolved ozone concentration from the first contact, resolving the productivity limitation of conventional systems
2Quantity of substance
If conventional systems operate at lower pressure, then equipment complexity is reduced, but dissolved gas concentration and transfer efficiency decrease
Solution Approach 1:
The system segments the pressure function by using a dedicated pressure vessel with a gas headspace that can be independently pressurized to 2-10 atm, while the liquid handling portion operates at near-ambient pressure. This segmentation allows high dissolved ozone concentration to be achieved through pressurization without subjecting the entire system to high pressure, resolving the contradiction between concentration and pressure stress
3Quantity of substance
If ozone generator capacity is increased to achieve higher dissolved ozone levels, then treatment effectiveness improves, but operational costs increase due to inefficient gas transfer
Solution Approach 1:
The system implements feedback through the bleed-off mechanism that continuously monitors and removes excess oxygen from the gas headspace. This feedback loop maintains optimal ozone concentration in the headspace by preventing oxygen buildup that would reduce mass transfer efficiency, ensuring maximum operational efficiency and reducing energy loss while achieving high dissolved ozone levels
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
The system achieves significantly higher dissolved ozone concentrations in water, up to 50 mg/L, compared to conventional systems, optimizing treatment efficiency and reducing operational costs by utilizing the full potential of ozone generators.
Implementation Method 1
maximize the concentration of dissolved ozone gas in a liquid by periodically or continuously dissolving ozone in the liquid that is sprayed through a gas feed of ozone and oxygen while removing excess oxygen gas from the headspace of the saturation tank
Implementation Method 2
removing excess oxygen gas from the headspace of the saturation tank used in the dissolution system
Data Source
AI summary
An apparatus and method for maximizing the dissolved concentration of ozone in a liquid. The apparatus includes a dissolution tank having a pressure vessel configured to contain a treated fluid and at least one gas in a head space above the treated fluid, an inlet configured to permit passage of an untreated fluid into the head space, and an outlet configured to permit passage of the treated fluid out of the vessel; a gas supply system configured to transport the at least one gas to the head space; a fluid supply system configured to provide the untreated fluid to the tank; a bleed-off system for removing gas from the head space so as to maximize the dissolved concentration of the ozone gas in the liquid; and a discharge device configured to pass the treated fluid from the tank into the target liquid.