A detection system for ultra-low dust on-line monitoring

Abstract

The invention discloses a detection system for ultra-low dust on-line monitoring, which includes a laser, a capillary, a microlens array, and a position sensor arranged in sequence, and the position sensor is connected with a controller; the capillary can only accommodate a single dust particle passing through ; It also includes the following processing steps: after the dust particles enter the capillary in turn and are irradiated by the laser, the scattered light after irradiation enters the microlens array, the microlens array gathers the scattered light on the position sensor, and the position sensor acquires relevant signals and transmits them to the controller. The controller then performs corresponding processing to calculate the total weight of the dust particles in the quantitative volume. The invention can effectively carry out on-line real-time monitoring, and has fast monitoring speed and good monitoring effect.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring, in particular to a detection system for ultra-low dust on-line monitoring. Background technique [0002] According to the provisions of the International Organization for Standardization, suspended solids with a particle size of less than 75 μm are defined as dust. Ultra-low dust refers to the dust gas whose dust concentration is less than 10mg / m3. Dust generated in general industrial processes needs to be dedusted before reaching the ultra-low dust emission index. At present, the monitoring content of ultra-low dust is the processed dust particles, and the size of the processed dust particles is less than 10 μm. [0003] At present, the ultra-low dust meters on the market usually use the following four methods for testing: [0004] Weighing method, take a certain amount of dusty air through the air pump, pass through the weighed filter membrane, and keep the dust on the filte...

AI Technical Summary

Problems solved by technology

The β-ray dust measuring instrument is not affected by the size and color of dust particles. The disadvantage is that there are radioactive substances, which is troublesome for users to operate, and the price is also quite high.

The piezoelectric balance dust meter is also a fast dust meter, but its measurement range is limited, generally 0-10mg / m 3 , the cleaning of the quartz crystal after the measurement is more complicated

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