DL/T 246-2015 in English
VALIDGuideline of chemical supervision
- Issued on:2015-04-02
- Implemented on:2015-09-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
Price(USD)：
$730.00
$709.00
$709.00
Introduction
Analysis of the core content of the standard
| Supervision areas | Requirements of the 2006 version | New/revised contents of the 2015 version |
|---|---|---|
| Scope of application | Power generation enterprises | Expanded to transmission and power supply enterprises |
| Online instruments | Basic configuration | Strengthening requirements for feed water TOC analyzer and superheated steam hydrogen meter |
| Water vapor indicators | General standards | Newly added unit capacity classification indicators (such as steam-water loss rate) |
Key technical requirements
1. Steam quality supervision
Key indicators: Dissolved oxygen in drum boiler feed water ≤7μg/L (expected value ≤5μg/L), sodium ion in direct current boiler ≤5μg/kg
Online chemical instrumentation configuration must meet the following requirements:
• Configuration rate ≥98% | • Accuracy ≥96% | • Inspection cycle ≤3 months
• Configuration rate ≥98% | • Accuracy ≥96% | • Inspection cycle ≤3 months
2. Fuel quality supervision
| Coal quality items | Detection frequency | Allowance deviation |
|---|---|---|
| Total sulfur content | Each batch | ≤1.5% (anthracite) |
| Ash melting point | New coal source must be tested | ST≥1350℃ |
Implementation suggestions
- Establish a three-level supervision system:Group-Research Institute-Grassroots Enterprise Linkage Mechanism
- Key equipment selection:Give priority to online instruments with automatic calibration function
- Data informatization:It is recommended to establish a centralized management platform for chemical supervision data
Standard Evolution Background
The 2015 edition focuses on the following revisions in view of the current situation of the popularization of supercritical units and the improvement of environmental protection requirements:
- Added detailed rules for the supervision of SF6 gas for power transmission equipment
- Strengthened the anti-corrosion requirements for air-cooled units
- Supplemented the supervision clauses for limestone desulfurization systems
Sample only — not a preview of DL/T 246-2015
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