| 摘要 |
PROBLEM TO BE SOLVED: To provide a concentration measuring apparatus which is capable of acquiring concentration distribution of a measuring object accurately and in a short time and can be easily installed in equipment, and a denitrification device.SOLUTION: A concentration measuring apparatus comprises a plurality of sampling pipes 20 which are installed through a wall surface of equipment and include openings formed to be positioned in a plurality of measuring points set in an internal space of the equipment, one laser measuring cell 23 of which one end portion is connected with the plurality of sampling pipes 20, a pump 50 which is connected with another end portion of the laser measuring cell 23 and sucks gases inside of the sampling pipes 20 and inside of the laser measuring cell 23, and electric valves 24 which are installed in the sampling pipes 20 and control distribution of gases to the laser measuring cell 23. The laser measuring cell 23 includes a light transmitting section 6 which irradiates the gas introduced into the laser measuring cell 23 with laser light, and a light receiving section 7 which receives laser light, and measures the concentration of a measuring object contained in the gas on the basis of intensity information of the laser light. |
