UV/O3/H2O2 Advanced Oxidation Reactor Design
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Solution Overview
Problem
Existing UV/O3, O3/H2O2, and UV/H2O2 advanced oxidation systems are independent and inefficient, with low ozone utilization rates and potential bromate generation, lacking a composite system design for simultaneous operation and optimized ultraviolet radiation.
Innovation Solution
A UV/O3/H2O2 advanced oxidation reactor with a bottom-inlet top-outlet curvet structure, featuring ultraviolet lamps angled relative to partition plates, an H2O2 adding device with a static mixer, and an O3 adding device with an ozone generator, allowing for independent or synchronous operation with controlled UV, H2O2, and O3 doses, optimizing reactor layout for enhanced oxidizability and reduced space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UV/O3, O3/H2O2, or UV/H2O2 advanced oxidation systems are used independently, then each process can be implemented, but the system complexity increases and treatment efficiency is limited
Solution Approach 1:
The patent combines UV/O3, O3/H2O2, and UV/H2O2 advanced oxidation processes into a single integrated reactor system. The reactor simultaneously accommodates ultraviolet lamps, ozone injection points, and H2O2 addition devices, allowing all three oxidation processes to occur concurrently in one unit rather than requiring separate independent systems.
Solution Approach 2:
The integrated reactor serves multiple functions: it performs UV irradiation, ozone oxidation, H2O2 oxidation, and generates hydroxyl radicals through multiple pathways (UV/H2O2, O3/H2O2, and UV/O3). This multi-functional design allows the single reactor to replace what would traditionally require multiple separate treatment units.
2Duration of action of moving object
If ozone oxidation is carried out in a traditional ozone contact tank with hydraulic retention time of 15 min and water depth of 7 m, then sufficient contact time is provided, but the ozone utilization rate is low and bromates may be generated
Solution Approach 1:
The patent significantly reduces the hydraulic retention time from 15 minutes to 3-5 minutes and decreases water depth from 7 meters to 2-3 meters. This parameter change is made possible by the enhanced oxidation efficiency of the integrated UV/O3/H2O2 system, which generates hydroxyl radicals that accelerate pollutant degradation, allowing effective treatment in a much shorter contact time and smaller reactor volume.
Solution Approach 2:
The system creates a composite oxidation environment by combining UV radiation, ozone, and H2O2 in the same reactor. This composite approach generates multiple reactive species (hydroxyl radicals from UV/H2O2, O3/H2O2, and UV/O3 pathways) that work synergistically to rapidly oxidize pollutants, improving ozone utilization efficiency and reducing the risk of bromate formation compared to conventional ozone-only systems.
3Productivity
If conventional cylindrical UV reactors are used, then the structure is simple, but the hydraulic retention time is short and ultraviolet radiation efficiency is insufficient
Solution Approach 1:
The patent employs a curved or arc-shaped reactor configuration instead of a conventional straight cylindrical design. The curved structure optimizes the flow path and enhances UV radiation distribution throughout the water column, increasing the effective exposure time and UV dose received by pollutants while maintaining a compact reactor volume.
Solution Approach 2:
The patent arranges ultraviolet lamps at angles relative to partition plates within the reactor, creating a three-dimensional UV irradiation field. This angular arrangement ensures that UV radiation reaches pollutants from multiple directions and angles, maximizing the ultraviolet dose delivered to the water during the short hydraulic retention time.
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
Enables efficient simultaneous operation of UV/O3, O3/H2O2, and UV/H2O2 processes, improving oxidation efficiency, avoiding bromate generation, and increasing UV utilization while reducing hydraulic retention time and operational costs.
Implementation Method 1
UV/O3, O3/H2O2 and UV/H2O2 advanced oxidation processes can generate high-oxidizability hydroxyl radicals (.OH) to rapidly and completely oxidize organic pollutants
Implementation Method 2
Ozone oxidation is typically carried out in an ozone contact tank
Implementation Method 3
UV/O3/H2O2 advanced oxidation reactor and process
Data Source
AI summary
A UV/O3/H2O2 advanced oxidation reactor includes a water inlet pipe, a water outlet pipe, an ultraviolet reactor, an H2O2 adding device and an O3 adding device. The ultraviolet reactor has a plurality of ultraviolet lamps embedded therein, and the ultraviolet lamps are arranged at an angle with respect to partition plates. The water inlet pipe is connected to a water inlet in a lower portion of the ultraviolet reactor, and the water outlet pipe is connected to a water outlet in an upper portion of the ultraviolet reactor. The H2O2 adding device and the O3 adding device are arranged on a connecting pipe of the water inlet pipe. After raw water is pressurized, H2O2 is added into the raw water through the H2O2 adding device, then ozone is added in the raw water through a water injector, and finally the raw water enters the ultraviolet reactor.