Bromine-Based Oxidizing Agent Filtration System
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Solution Overview
Problem
Current filtration treatment systems require complex steps and generate significant washing wastewater when treating water with organic substances, as they need to use oxidizing agents like hypochlorous acid, which can degrade reverse osmosis membranes and require additional agents for slime control and wastewater neutralization.
Innovation Solution
A filtration treatment system that uses a bromine-based oxidizing agent or its reaction products with chlorine-based agents and sulfamic acid, applied under an inert gas atmosphere, to simplify the treatment process and reduce wastewater by inhibiting slime generation and membrane degradation without the need for additional agents or extensive flushing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an oxidizing agent such as hypochlorous acid is added to the raw water or backwash water for slime control, then slime generation is inhibited, but residual oxidizing agent degrades the reverse osmosis membrane
Solution Approach 1:
The patent changes the chemical parameter by using bromine-based oxidizing agents instead of chlorine-based hypochlorous acid. Bromine compounds provide effective slime control while being less harmful to polyamide reverse osmosis membranes, thus resolving the contradiction between slime inhibition and membrane protection
Solution Approach 2:
The patent introduces activated carbon as an intermediary substance that removes residual oxidizing agents before they reach the reverse osmosis membrane. The activated carbon column acts as a buffer that protects the membrane from direct contact with harmful oxidizing agents while maintaining slime control benefits
2Object-affected harmful factors
If additional treatment steps (activated carbon column, reducing agent addition) are added to remove residual oxidizing agents, then membrane degradation is prevented, but system complexity increases
Solution Approach 1:
The patent extracts and removes the harmful residual oxidizing agents using an activated carbon column positioned between the oxidizing agent injection point and the reverse osmosis membrane. This separation allows the system to maintain slime control while protecting the membrane, balancing complexity and protection needs
3Reliability
If a chemical agent cleaning step is performed to remove accumulated impurities, then membrane performance is restored, but washing wastewater is generated
Solution Approach 1:
The patent implements a flushing step that recovers and reuses the washing water containing dissolved impurities. Instead of discarding the wastewater, it is collected and can be treated or reused, reducing overall water consumption and wastewater generation while maintaining effective membrane cleaning
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 effectively reduces the complexity of treatment steps and minimizes washing wastewater while preventing slime generation and membrane degradation, allowing for stable operation of polyamide reverse osmosis membranes without the need for additional reducing agents or activated carbon.
Implementation Method 1
a bromine-based oxidizing agent, or a reaction product of a bromine compound and a chlorine-based oxidizing agent
Implementation Method 2
a sulfamic acid compound, or alternatively, includes a reaction product of a sulfamic acid compound with a bromine-based oxidizing agent
Implementation Method 3
a reverse osmosis membrane treatment means for subjecting the prefiltration-treated water from the prefiltration treatment means to a reverse osmosis membrane treatment
Implementation Method 4
a prefiltration treatment means for removing insoluble components from a water to be treated that contains organic substance
Data Source
AI summary
This filtration treatment system is provided with a membrane filtration device as a prefiltration treatment device for removing insoluble components from the water to be treated containing organic substance, a reverse osmosis membrane treatment device for subjecting the prefiltration-treated water to reverse osmosis membrane treatment, and a chemical agent supply pipe for supplying a chemical agent into the membrane filtration device, wherein the chemical agent contains a sulfamic acid compound, and a bromine-based oxidizing agent or the reaction product of a bromine compound with a chlorine-based oxidizing agent, or, contains the reaction product of a sulfamic acid compound with a bromine-based oxidizing agent or with the reaction product of a bromine compound with a chlorine-based oxidizing agent.