Coal powder concentration device

The boiler air powder online monitoring device is developed using the principle of AC charge induction. In a dynamic state, any two different substances will induce each other to generate charges. The GLT-F-PCC series products measure various parameters of coal powder flow based on the AC charge induction signal generated by the medium flowing through the monitoring probe and the probe. This product is based on AC charge induction technology, combined with modern digital signal processing technology and fieldbus technology to achieve real-time, high-precision, continuous, maintenance free monitoring of various parameters of coal powder airflow in the primary air duct of the coal mill outlet. It effectively promotes the development of boiler combustion optimization system and provides reliable measurement methods and basis for further reducing NOx, Cox and fly ash combustible emissions, improving boiler combustion efficiency.

Coal chemical particle content monitoring instrument,Coal powder concentration deviceTypical applications:

Pulverized coal concentration in each pulverized coal pipeline of the power plant or other dust removal places;

Wind speed measurement locations inside the primary and tertiary air ducts of boilers or other wind speed measurement sites

1、 Working principle

1. Measurement principle of coal powder wind speed

When the measured gas flows, the gas pressure measured by the backrest tube facing the gas flow direction is called "total pressure", and the gas pressure measured by the backrest tube facing away from the gas flow direction is called "static pressure". The difference between total pressure and static pressure is called "differential pressure", and the higher the wind speed, the greater the differential pressure; The relationship between wind speed and differential pressure conforms to the Bernoulli equation.

2. Measurement principle of coal powder concentration

During the transportation of gas-solid two-phase fluids containing dust particles, the collision and friction between coal powder particles and coal powder particles, as well as between coal powder particles and the inner wall of pipelines, will cause the coal powder particles to carry charges and form an electrostatic field. When charged coal powder particles pass through the measuring electrode, positive and negative charges are induced by the measuring electrode, and the charges form a current signal during the transfer motion; The magnitude of this AC signal is directly proportional to the mass content of coal powder. By further amplifying and processing this electrical signal, the ratio of coal powder quantity to air volume (kg/kg) can be measured.

IICoal powder concentration deviceProduct Features

The backrest tube and coal powder measuring electrode are both equipped with corundum 99 protective sleeves, which have high wear resistance and long service life.

L has a self-cleaning function to prevent dust blockage.

The wind speed measurement device does not have installation requirements for "+" and "-" polarity.

Realize data measurement across the entire pipeline cross-section, with highly representative measurement values

Implement synchronous measurement of each coal powder pipeline and use fieldbus technology to achieve non-destructive data transmission;

L maintenance free design, no need to configure additional blowing equipment, and there is no equipment blockage problem;

Less requirements for straight pipe sections and strong environmental adaptability

The sensor is easy to install and the coal mill has a short shutdown time

3、 Technical indicators

1. Coal powder concentration sensor

2. Parameters of coal powder wind speed sensor