Application of Laser Dust Sensors in Closed Coal Yard Dust Monitoring

The serious dust problem in closed coal yards significantly affects environmental quality and the health of workers. Traditional monitoring methods often have limitations such as low accuracy and susceptibility to interference. In contrast, laser dust sensors have advantages such as high precision, sensitivity, and rapid response, making them better suited for dust monitoring requirements.

In closed coal yards, various production processes such as coal conveying, blending, screening, crushing, and transportation generate large amounts of dust. This dust not only poses a health risk to on-site workers but also contributes to atmospheric pollution.

During production, solid particles that can remain suspended in the air for extended periods are generated, known as production dust. These particles not only contaminate the production environment but may also have adverse effects on the health of on-site workers. Prolonged inhalation of certain types of production dust can lead to systemic diseases primarily characterized by fibrosis of lung tissue, known as pneumoconiosis.

To strengthen the scientific management of dust prevention measures in closed coal yards, protect the health of workers, and safeguard the atmospheric environment, it is necessary to establish a dust monitoring system for closed coal yards to detect dust concentrations in the working environment.

Laser dust sensors can measure both total dust and respirable dust concentrations in closed coal yard operations. These sensors utilize the principle of light scattering to detect dust particles in the air. They are compact modules capable of accurately measuring specific values for PM1.0, PM2.5, and PM10, with USART (3.3V TTL level) and PWM (customizable) outputs. The sensors have the advantages of small size, high detection accuracy, good repeatability, consistency, real-time response, continuous sampling, strong anti-interference ability, and a super-quiet fan. The sensors undergo 100% testing and calibration before leaving the factory, making them suitable for various occasions requiring PM value detection.

Currently, laser dust sensors have found successful applications in the following fields:

• Determination of dust concentrations in production sites of industrial and mining enterprises, specifically coal mine dust detection by labor departments.
• Monitoring of inhalable particulate matter in public places by health and epidemic prevention agencies.
• Atmospheric dust detection and pollution source investigation by environmental monitoring departments.
• Municipal smoke monitoring.
• Scientific research, on-site testing of filter performance, etc.
• On-site dust concentration determination and exhaust port dust concentration monitoring.
• Pharmaceutical manufacturing testing.
• Occupational health and safety testing.
• Places in factories requiring clean air, management of precision instruments, testing instruments, electronic components, and manufacturing processes for food, pharmaceuticals, etc.
• Various research institutions, meteorology, public health, industrial hygiene engineering, atmospheric pollution research, etc.
• Dust detection in construction or blasting areas, exposure monitoring in construction sites.
• Indoor air quality testing, air purification, e.g., air purifiers, air conditioning, dehumidifiers, ventilation fans or systems, formaldehyde detectors, smart homes, etc.
• In the automotive industry, in-car air monitoring and purification, mobile on-board urban air monitoring stations.