A dual optical path laser forward scattering particle concentration measurement device

Abstract

The invention discloses a dual optical path laser forward scattering particle concentration measuring device, which belongs to the technical field of particle concentration measurement. A dual optical path laser forward scattering particle concentration measurement device, including a measuring probe rod and an electrical unit box and a receiving box arranged at both ends of the measuring probe rod, the receiving box and the measuring probe rod are connected by an optical fiber tube, the electrical unit box and the receiving box The outer wall of the box is provided with a first walking assembly and a second walking assembly; the invention facilitates the isolation of the communication between the measuring device and the water-gas environment in the flue through the blowing mechanism, so that the measuring device is relatively sealed, avoiding internal corrosion, and improving the service life of the device. And the heat is diffused to the area to be measured through the blowing mechanism, avoiding the influence of water vapor on the laser measurement, improving the accuracy of the measurement, and moving the device in the flue through the walking component, so that the device can check the particle concentration in different areas , thereby improving the measurement accuracy.

Description

technical field [0001] The invention relates to the technical field of particle concentration measurement, in particular to a dual optical path laser forward scattering particle concentration measurement device. Background technique [0002] The most commonly used on-line monitoring equipment for particle concentration on the market is based on the principle of laser scattering. When it is high, the scattered light cross section of the particles increases, and the scattered light is enhanced, and the concentration of the particles is further measured by the intensity of the scattered light. [0003] In the prior art, the invention patent with the patent application number CN201811562577.6 discloses "a dual optical path laser forward scattering particle concentration measurement device, including an electrical unit box, a measuring probe rod and a receiving box, and the electrical unit box is provided with Laser transmitter and laser processor; the invention uses dual optica...

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Problems solved by technology

[0003] In the prior art, the invention patent with the patent application number CN201811562577.6 discloses "a dual optical path laser forward scattering particle concentration measurement device, including an electrical unit box, a measuring probe and a receiving box. The electrical unit box is equipped with Laser transmitter and laser processor; the invention uses dual optical path forward scattering to measure the concentration of particulate matter, and has calibration optical path calibration to improve the accuracy of the measurement results", but there are still defects. In the actual use process, in the ultra-low emission industry Under normal circumstances, the measurement is affected by the environmental factors of the flue such as water vapor, which may easily cause inaccurate measurement, and the light transmission hole and light receiving hole for the laser to pass through the device make the measurement probe rod and the inside of the receiving box in contact with the flue gas. The channel environment is connected to each other, and water vapor can easily enter the device through the light hole, which will corrode the device and affect the service life of the device. Poor sex

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