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Hebi Aowei Electronic Technology Co., Ltd
The ash melting tester provides core basis for boiler design and combustion optimization
Date: 2025-11-17Read: 1
The ash fusibility tester is a key equipment in the detection of coal, biomass, and solid waste fuels. It is used to measure the deformation temperature (DT), softening temperature (ST), hemisphere temperature (HT), and flow temperature (FT) of coal ash at high temperatures, providing core basis for boiler design, slagging prediction, and combustion optimization. The accurate discrimination of the ash fusibility tester relies on the collaborative operation of multiple high-precision functional modules, each of which carries the technical mission of ash observation and temperature control.
1. High temperature furnace body system
Using silicon carbon or silicon molybdenum rod heating elements, the maximum temperature can reach 1600 ℃, and the heating rate can be adjusted (usually ≤ 15 ℃/min). The furnace is made of corundum or high-purity alumina material, which is resistant to high temperature and corrosion. It is embedded with multi-point thermocouples to monitor the uniformity of the temperature field in real time (within ± 2 ℃), ensuring consistent heating of the ash cone.
2. Grey cone support plate and observation window
Material of the pallet: made of high-purity alumina or corundum, resistant to high temperatures and does not react with the ash sample;
Observation window design: double-layer quartz glass+inert gas blowing to prevent high-temperature smoke and dust from adhering and maintain clear visibility;
The pallet can automatically enter and exit the furnace, avoiding manual interference with the testing process.
3. Optical Imaging and Image Recognition System
Equipped with a high-resolution industrial camera and a telephoto lens, it captures real-time changes in the shape of the gray cone. The software is based on AI image algorithms to automatically identify the four feature points of DT, ST, HT, and FT, reducing human errors. Some models support dual view (side view+top view) synchronous analysis to improve the accuracy of interpretation.
4. Atmosphere control system
Can switch between weakly reducing atmosphere (CO/CO2 mixture or carbon sealing method) and oxidizing atmosphere (air), truly reducing the combustion environment of the boiler. The gas flow rate is precisely regulated by a mass flow controller (MFC) to ensure stable atmosphere and comply with the requirements of GB/T219 and ISO540 standards.
5. Control and Data Processing Unit
Integrated PLC and touch screen, pre-set standard heating program, automatically records temperature time curve and gray cone image. Support data export, report generation, and historical comparison to meet the traceability requirements of laboratory certification (CNAS/CMA).
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