On-line Coal Ash Meter

La description

The on-line coal ash meter is used for on-line and off-line detection as well as the computation and control of coal ash. It is widely applied in coal mines, coal washing plants, coal blending plants, coking plants, coal-fired power plants, steel plants and coal wharfs, etc. It is especially suitable for on-line coal ash analysis on the entire belt conveyer during the coal transportation process, and then the corresponding analog signal will be delivered. It provides coal industries and coal blending facilities with data reference to realize closed-loop automatic control, which ensures the optimization of production, and therefore achieve economic benefits to the utmost extent. The meter is also applicable when it comes to rapid analysis of coal quality.
Measurement principle: 

On the basis of double energy γ ray absorption method, the coal ash content can be calculated by processing data of the two rays after passing coal attenuation.

Performance parameters:

The main technical indexes comply with the requirements of nuclear industry standards of the People’s Republic of China: EJ/T ********8《γ radiation coal ash measuring meter》.

Measurement accuracy:

. When the ash content is between 0 and *5%, error ≤±0.5%;

. When the ash content is between *5% and *0%, error ≤±1.0%;

. When the ash content percentage is beyond *0%,, error ≤±2.0%;

Main functions and technology characteristics:

(1) It adopts new nuclear electronic technology and nuclear analysis technology, successfully develops ray spectrum automatic stabilizing peak technology (currently this technology has been granted as a national patent). It is capable of automatic compensation for instrument drift caused by various factors like environmental changes and component performance instabilities.

(2) In order to achieve the best effects possible, the whole design is tested by a combination of repeated theoretical calculation and experimental verification of Monte Carlo method.

(3) Historical records can be reviewed at any time, and displayed with a chart.

(4) The applied program setting has different operating grades and relative password protection to prevent the mishandling by unauthorized personnel. The user interface can be a DOS operating interface or WINDOWS operating interface according to onsite requirements.

(5) It achieves non-contact measurement by using the principle of ray penetrating materials. It does not produce any direct touch between the detector and the coal that is being measured, which ensures that long-term running to be stable, reliable and nonperishable.

(6) Historical data inquiry: including “coal ash”, “each route ray counting”, “detector high voltage”， “temperature insides the machine” etc. Each selection provides a choice in time intervals: 1 minute, *0 minutes, thirty minutes, 1 hour, 8 hours, or one day. The output frequency is one control signal (***0mA) per second in corresponding to the ash content to support automatic production control.