Application Of Radar Level Gauges in Cement Plants: Overcoming Strong Dust Interference

Throughout the entire cement production process, from mining to the storage and packaging of finished cement, Silo Level Monitoring and alarm control is particularly important. However, due to the complex working conditions in cement plants, high-dust radar level gauges face numerous challenges in actual measurements. This article will explore these challenges and their solutions.

Firstly, the level measurement in cement plants is often conducted in environments with extremely high dust concentrations, especially in silos that utilize pneumatic feeding. The types of materials involved are diverse, with varying particle sizes and dielectric constants, such as crushed limestone, raw materials, clinker, fly ash, coal powder, and finished cement. This diversity makes precise Silo Level Monitoring exceptionally difficult, particularly for fly ash silos with low dielectric constants.

Secondly, another difficulty in cement production is strong dust interference. Particularly in silos that convey powdered materials pneumatically, the feeding process generates a large amount of dust, resulting in extremely low visibility. Although radar level gauges can still receive some level surface echoes under these conditions, the signal strength is often weakened. Moreover, echo refraction caused by an uneven material surface may prevent the radar from receiving echo signals. In certain working conditions, silos that have aeration at the bottom can cause the material surface to become loose, further complicating the Silo Level Monitoring.

So, what measures can be taken to address these challenges? In environments with high dust levels, one option is to choose mining radar equipment that emits higher energy. Additionally, it is advisable to use measurement software with a lost wave waiting continuous measurement algorithm. When a high-dust radar level gauge encounters a brief loss of echo in a strong dust environment, the measurement results will not be misinterpreted. Once the continuous measurement algorithm mode is activated, accurate level measurement values can be obtained as long as the true level reflection wave can be identified within the set waiting time.

Furthermore, in cement plants, some silos can reach heights of up to 50 meters. Manually climbing to adjust the radar not only consumes time but is also labor-intensive. Therefore, it is recommended to use equipment that can be remotely calibrated from a central control room. Through the central control room, staff can easily set basic parameters such as measurement range, observe the echo waveform of the high-dust radar level gauge, and conduct remote diagnostics and adjustments through the waveform. This significantly reduces the workload of on-site personnel and minimizes the risks associated with climbing operations.