HJ 1024-2019 in English
VALIDSolid waste - Determination of loss on ignition – Gravimetric method
- Issued on:2019-05-18
- Implemented on:2019-09-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$97.00
本标准规定了测定固体废物热灼减率的重量法。
本标准适用于生活垃圾、医疗废物、危险废物等焚烧余物的热灼减率的测定。
Introduction
Standard Background and Significance
This standard, as a supporting technical specification for the Environmental Protection Law of the People's Republic of China, establishes for the first time a standardized test method for the thermal loss rate, a core indicator for evaluating the efficiency of solid waste incineration. By quantifying the high-temperature weight loss ratio of incineration residues, it can effectively monitor the operating efficiency of waste incineration plants and assess the risk of generating pollutants such as dioxins.
Term Definition Analysis
| Term | Definition | Actual Application Scenarios |
|---|---|---|
| Incineration Residues | Slag Directly Discharged from the Furnace Bed and Ash from Superheater and Economizer | Slag Detection in Municipal Waste Incineration Plants |
| Heat Loss Rate | Percentage of Mass Loss after Incineration at 600℃ | Evaluation of Medical Waste Incineration Efficiency |
Instrument and Equipment Requirements
Key equipment includes: class=instrument>Muffle furnace (600±25℃), analytical balance (0.01g accuracy), porcelain crucible (50ml with lid). A hazardous waste treatment center uses a CARBOLITE CWF 1200 muffle furnace with a METTLER TOLEDO XSR205 balance to achieve a measurement deviation of ±0.3%.
Detailed operation process
- Sample preparation: crush to 1mm particle size, remove metal/stone and other foreign matter
- Drying to constant weight: dry at 110±5℃ for 2h, repeat to constant weight of ±0.02g
- High temperature calcination: maintain at 600℃ for 3h, cool and weigh
Typical medical waste incineration slag test data show that when the calcination time is less than 2.5h, the result deviation can reach 1.8%, emphasizing the importance of strict temperature control and timing.
Quality control requirements
| Indicator | Limit | Handling of exceeding the standard |
|---|---|---|
| Parallel sample deviation | ≤20% | Re-sample preparation and testing |
| Method detection limit | 0.2% | Increase sampling volume to 50g |
Implementation Suggestions
Laboratory transformation case: A provincial monitoring station reduced the RSD from 5.2% to 2.1% by adding a vacuum dryer and a anti-seismic platform. It is recommended that testing agencies focus on:
- Establish exclusive use files for porcelain crucibles
- Implement temperature field calibration of muffle furnaces (every quarter)
- Conduct inter-laboratory comparisons (twice a year)
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