Laser multi-reflecting and absorbing tank for high temperature gas detection

Abstract

The invention discloses a laser multi-reflecting and absorbing tank for high-temperature gas detection, which comprises an absorbing tank tube. A front cavity mirror is provided at a front end insidethe absorbing tank tube. A rear cavity mirror is provided at a rear end inside the absorbing tank tube. A detector and a laser transmitter are provided at a front end outside the absorbing tank tube.A plurality of gas pipe joints are provided on the wall of the absorbing tank tube. According to the invention, a laser multi-reflecting and absorbing tank is used as a sampling and measuring gas chamber; the front cavity mirror and the rear cavity mirror are provided to form a multi-reflecting optical path, and accordingly, compared with an absorbing optical path of the in-situ detection, an absorbing optical path thereof is increased by several times, thereby being capable of improving the measuring precision. The laser multi-reflecting and absorbing tank is mounted in a heating cabinet boxpreprocessed at a high temperature, and the laser transmitter and the detector are placed outside the heating cabinet box and are connected with a monitor main body via an optical fiber and a cable. Real-time measurement can be performed on a high-temperature gas which enters the absorbing tank after being sampled and processed, and the measuring precision and reliability are improved.

Description

technical field [0001] The invention relates to the technical field of industrial environment gas monitoring, in particular to a laser multiple reflection absorption cell for high-temperature gas detection. Background technique [0002] In the production process of cement plants, thermal power plants and other enterprises, the denitrification process is usually used to control the emission of nitrogen oxide pollutants. The denitrification process is to inject ammonia into the reactor, and react with nitrogen oxides to form water and harmless nitrogen. Too little ammonia injection will lead to a reduction in conversion efficiency, and excessive ammonia injection will cause ammonia to escape from the reaction zone and react with sulfate generated in the process to form ammonium sulfate, which can cause serious corrosion damage to related equipment components. Not only does it affect normal production, but the maintenance cost is also very expensive, so it is necessary to moni...

AI Technical Summary

Problems solved by technology

Too little ammonia injection will lead to a reduction in conversion efficiency, and excessive ammonia injection will cause ammonia to escape from the reaction zone and react with sulfate generated in the process to form ammonium sulfate, which can cause serious corrosion damage to related equipment components. Not only does it affect normal production, but the maintenance cost is also very expensive, so it is necessary to monitor the residual ammonia aft

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