DL/T 953-2018 in English
VALIDDetermination method of heat resistance and oxidation resistance of strongly basic anion exchange resin for water treatment
- Issued on:2018-06-06
- Implemented on:2018-10-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$145.00
| Standard No: | DL/T 953-2018 |
| Document status: | VALID |
| Title in English: | Determination method of heat resistance and oxidation resistance of strongly basic anion exchange resin for water treatment |
| Title in Chinese: | 水处理用强碱性阴离子交换树脂耐热性能及抗氧化性能测定方法 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2018-06-06 |
| Implemented on: | 2018-10-01 |
| Chinese Classification: | F20- |
| Professional Classification: | DL-Electricity |
Introduction
Analysis of Standard Technology Evolution
| Technical Parameters | DL/T 953-2005 | DL/T 953-2018 | Optimization Description |
|---|---|---|---|
| Test Equipment | Constant Temperature Water Bath | Constant Temperature Water Bath Shaker | Improve temperature uniformity and reaction efficiency |
| Test Temperature/Time | 95℃/100h | 90℃/48h | Closer to actual working conditions |
| New test items | - | Determination of antioxidant properties | Improve the resin performance evaluation system |
Analysis of core determination methods
The standard adopts a dual-path degradation test:
- Thermal degradation path: 48 hours in pure water at 90℃
- Thermal oxidation degradation path: 48 hours in 6% H2O2 solution at 90℃
The resin stability is quantitatively evaluated by measuring the decrease rate of strong group exchange capacity before and after degradation (the calculation formula is shown in standard 9.2-9.4). Experiments show that the oxidation degradation decrease rate Ro can better reflect the performance attenuation in actual use.
Key instrument requirements
- Constant temperature water bath shaker: temperature control accuracy 0.1℃, speed 100r/min
- Polytetrafluoroethylene test bottle: 200mL×6 pieces, corrosion-resistant design
- Centrifuge: 2000r/min speed, equipped with 50mL centrifuge tube
Implementation suggestions
Application case of thermal power plant
A 1000MW unit uses this standard to test D201 resin:
- Thermal degradation reduction rate is 2.3% (lower than the industry average of 3.1%)
- Oxidative degradation reduction rate is 5.8% (repeatability r=0.42)
- Based on this, the regeneration cycle is extended by 15%
Operation Note: Resin transformation must be strictly carried out in accordance with GB/T 5476. Incomplete ROH type transformation will result in a test value deviation of >10%.
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