GB/T 34191-2017 in English
VALIDMethods of determination and calculation of heat balance in straight grate process for pellet firing of iron and steel industry
- Issued on:2017-09-07
- Implemented on:2018-06-01
- File Format:PDF
- Delivery:Via email within 5 business days
$301.00
《GB/T 34191-2017钢铁行业带式焙烧机焙烧球团热平衡测试与计算方法》由TC183（全国钢标准化技术委员会）归口，主管部门为中国钢铁工业协会。
Introduction
Analysis of the core content of the standard
This standard systematically specifies the thermal testing methods of belt roasting machine in the pellet production process, and establishes a complete heat balance model including 9 income items and 9 expenditure items. Its innovation is reflected in:
1) Multi-benchmark system: The workshop ambient temperature (1m away from the equipment) and standard atmospheric pressure are clearly used as the benchmarks, and the received base minimum calorific value is used as the fuel calculation benchmark2) Full process coverage: The test scope covers 7 process sections such as the blast drying section and the roasting section, requiring continuous testing for 8 hours and no less than 2 times a dayComparison of key technical indicators
| Test parameters | Measurement requirements | Instrument accuracy |
|---|---|---|
| Flue gas composition | CO:0-1%Resolution 0.01% | NDIR sensor |
| Furnace body temperature | ≥5 measuring points per section | ±2.5℃(K-type thermocouple) |
| Gas flow | Pitot tube measurement | Micro differential pressure gauge Class 1 accuracy |
Heat balance calculation model
Core calculation formula:
Material balance difference verification: |ΔM/∑M|×100≤5% Thermal efficiency calculation: η=(Q₁'+Q₄'+Q₅'+Q₆')/(∑Q-Q₁)×100%Implementation suggestions
Standard evolution analysis
Compared with the old version, this standard has been strengthened mainly by:
- Added calculation of heat of decomposition of crystal water (4184kJ/kg)
- Refine the surface heat dissipation calculation formula (including calculation of convection heat transfer coefficient α_d for different working conditions)
- Improve the equipment parameter collection template in Appendix A
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