Key Features
Online Continuous Measuring, Real-Time display of the Ash Content The instrument is based on the principle of the reactions that take place inside the nucleus of the elements being analysed. Due to the excitation of the nucleus, different elements will emit Gamma rays with their own characteristics, This system is programmed to identify the different nucleus types by analysing the y-ray peak value emitted and quantify the elements through the analysis of y-ray peak area.
The detection device is placed above the conveyor belt while the radioactive source is positioned below the belt. When coal flow through the analysis section which is irradiated by the Radioactive source, some radio nuclide will produce inelastic scattered reaction with high-energy neutrons to emit characteristic y-rays. The arrangement of the detector and the neutron generator has a slow integration and some high-energy neutrons will become low-energy ones because of this slow integration The low-energy neutrons generate and emit characteristic y-rays. The detection system analyses element types contained in the material based on y-ray energy and determine weight percentage content based on the corresponding peak area.
Uses Dual y(Gamma Ray) source: Am-241 and Cs-137
- The Measuring Arm can be rotated to align with the Conveyor Belt. It alos allows eay access to the system whenever required.
- A Standard Test Block is supplied as standard accessory using which the system can automatically adjust cumulative drift of the instrument.
- An optional Thermostat system can be integrated into the instrument for harsh climates
- The system is very easy to Install and Maintain.
- The Ash Analyzer supports long-distance communication. The detector and the host computer can be kept more than 1,000 meters apart
Technical Specifications*
Model | Online Coal Ash Analyzer |
Range | Low Ash Coal (ash content <15%), basic error: < 0.5%. |
Accuracy | Medium Ash Coal (ash content of 15% to 25%, basic error: < 1%. |
| High Ash Coal (ash content> 45%), basic error: <+-2%. |
Repeatability | Repeated measurements of the same coal of 5 minutes' frequency displayed an average coefficient of variation less than 1%. |
Static stability | The instrument system can operate at temperatures upto 50 deg C |
| Can measure different types of incoming coal on the belt. The probe has to be calibrated as per coal type or previous calibration values selected. |
| Permits signal transmission within 1000 meters without interference. Additional signal amplifiers can be integrated for larger distances |
Power supply voltage | AC 220V 10V, 50Hz, |
Power consumption | 500W approximately |
Note: Due to process of continuous improvements, specifications are subject to change without prior notice
Accessories
- Ash sensor : NaI crystal Photomultiplier, pre-amplifier, high-voltage power supply unit, constant temperature facility
- Onside controller : AC power supplying system, DC-power supply data-switching facility
- Engineering PC : Engineering PC with accessories Software
Advanced Detection PrincipleThis analyzer leverages dual-energy gamma-ray absorption technology for precise, non-destructive ash content determination directly in bulk coal on moving conveyor belts. Its non-contact, continuous measurement approach enhances safety and efficiency while reducing manual sampling.
Rugged Industrial DesignEngineered for harsh operating environments, the equipment boasts IP65 dust and water resistance, operates reliably across -20C to +55C at up to 95% humidity, and fits various conveyor sizes. Its adaptable design ensures durability and uninterrupted performance in challenging industrial settings.
Flexible Data Handling & AutomationUsers benefit from both digital and analog data output, real-time remote or local monitoring, and PLC-based full automation. The analyzer features customizable alarms, adjustable data logging intervals (160 seconds), and simple integration into existing process channels via RS232/RS485/Ethernet interfaces.
FAQs of Online Coal Ash Analyzer:
Q: How does the dual-energy gamma-ray absorption principle work in the online coal ash analyzer?
A: The analyzer emits two gamma-ray energies through the coal stream on the conveyor belt. By measuring the differential absorption of these energies, the system calculates ash content accurately and continuously, without physically contacting or destructing the coal sample.
Q: What are the installation requirements for this analyzer in an industrial environment?
A: The analyzer is designed for direct, over-the-belt installation on conveyor systems. Custom mounting options accommodate various conveyor widths (typically 500 mm). Its IP65 protection and tolerance for harsh temperatures and humidity make it suitable for mines, power plants, and coal processing plants.
Q: When and how should the system be calibrated?
A: Calibration can be performed automatically or manually, depending on operational preferences and coal type. Automatic options ensure stability during continuous operation, but manual calibration may be conducted periodically for enhanced accuracy, especially after maintenance or significant process changes.
Q: Where can the analyzers data be accessed and how is it transmitted?
A: Data from the analyzer is available both locally, via digital or LED touch screens, and remotely, through RS232, RS485, or Ethernet interfaces. This flexibility supports data monitoring and management from the control room or offsite locations as needed.
Q: What is the benefit of using customizable alarm functions in the analyzer?
A: Customizable high- and low-ash content alarms enable prompt responses to process deviations, reducing out-of-spec shipments and improving product quality. Operators are immediately alerted when ash levels exceed preset thresholds, supporting proactive process control.
Q: How does real-time, non-contact coal analysis improve operational efficiency?
A: Continuous, online measurement eliminates the need for manual sampling and laboratory testing. Operators receive immediate ash content data, allowing for instant process adjustments and better product blending, which streamlines workflow and enhances operational efficiency.
