GB/T 37894-2019 in English
VALIDTechnical requirements for ozone generator for water and wastewater treatment
- Issued on:2019-08-30
- Implemented on:2020-07-01
- File Format:PDF
- Delivery:Via email within 5 business days
$476.00
《GB/T 37894-2019水处理用臭氧发生器技术要求》由TC434（全国城镇给水排水标准化技术委员会）归口，主管部门为住房和城乡建设部。
Introduction
Analysis of the core content of the standard
This standard specifies the technical requirements for water treatment ozone generators using dielectric barrier discharge (DBD) technology, including the structural design, material selection and performance index control system of tubular/plate type ozone generating units.
Comparison of key technical indicators
| Parameter type | Air source type | Oxygen source type | Test conditions |
|---|---|---|---|
| Ozone concentration (g/m³) | ≥25 | ≥150(normal)/180(high concentration) | NTP status |
| Ozone power consumption (kW·h/kg) | ≤17 | ≤12 | |
| Cooling water flow rate (m³/h·kg) | ≤4(rated)/≥3(working) | ≤2(rated)/≥1.5(working) |
Material and structural design points
Key material requirements
- Dielectric: High insulation and oxidation-resistant materials such as glass/enamel/ceramic
- Electrode material: S31603 stainless steel or titanium alloy
- Seal: Inert materials such as PTFE/PVDF/perfluororubber
Structural safety design
- Pressure vessel must comply with GB/T150 standard
- Protection grade ≥IP44
- Emergency power-off switch and pressure protection device shall be set
In-depth analysis of the test method
Ozone concentration determination
Use the iodine titration method (arbitration method) or ultraviolet absorption method, and focus on the following:
- Calibration error of sodium thiosulfate titrant ≤2%
- Gas temperature and pressure correction calculation
- Inlet-outlet flow conversion coefficient (see Appendix C)
Performance stability verification
After 4 hours of continuous operation, the fluctuation value of ozone concentration and power consumption within 2 hours is ≤5%
Standard implementation recommendations
Selection and application guidance
- Select the corresponding output specification (5g/h-20kg/h) according to the processing scale
- Oxygen source type is suitable for high concentration demand scenarios
- The energy efficiency of medium and high frequency generators is better than that of industrial frequency equipment
Maintenance and management points
- Regularly calibrate the ozone detector (at least once a year)
- Cooling water hardness control ≤450mg/L (CaCO₃ meter)
- Check the dielectric breakdown rate (annual loss ≤0.5%)
Technology evolution analysis
Compared with the earlier version, this standard has the following major improvements:
- Added technical requirements for high frequency (>1000Hz) generators
- Refined the parameter requirements for VPSA oxygen source
- Introduced ultraviolet absorption method as the standard detection method
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