CHEMILUMINESCENT SULFUR DETECTOR

• Main Authors: YAMANE MASAFUMI, NAKANO SHIGENOBU
• Format: Patent
• Language: English; Japanese
• Published: 20.08.2020
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

To facilitate a shut-down task of a chemiluminescent sulfur detector (SCD).SOLUTION: The SDC is provided with: a heating furnace 210 including gas flow passages 211 and 212 having first and second supply ports, and a heater 215 for heating the gas flow passages; a redox gas supply unit for supplying an oxidant gas through the first supply port and for supplying a reductant gas through the second supply port; a reaction cell for reacting a sample gas that has passed through the gas flow passages with ozone, and an ozone supply unit for supplying ozone into the reaction cell; a vacuum pump 236 connected to the reaction cell, a photo-detector 233 for detecting light generated in the reaction cell, a signal reception unit 311 for receiving a shut-down signal; and a shut-down function unit 312 for controlling each unit based on the reception of the shut-down signal so that a reductant gas and oxidant gas supply operation, a gas flow path heating operation, an ozone supply operation, and a vacuuming operation are automatically stopped.SELECTED DRAWING: Figure 2 【課題】化学発光硫黄検出器（ＳＣＤ）をシャットダウンするための作業を容易にする。【解決手段】ＳＣＤは、第１及び第２供給口を有するガス流路２１１，２１２、ガス流路を加熱するヒータ２１５を備えた加熱炉２１０と、第１供給口を通してガス流路に酸化剤ガスを供給し、第２供給口を通して還元剤ガスを供給する酸化還元用ガス供給ユニットと、ガス流路を通過してきた試料ガスをオゾンと反応させるための反応セルと、反応セル内にオゾンを供給するオゾン供給ユニットと、反応セルに接続された真空ポンプ２３６と、反応セル内で発生した光を検出する光検出器２３３と、シャットダウン信号を受け付ける信号受付部３１１と、シャットダウン信号の受け付けに基づいて、還元剤ガス及び酸化剤ガスの供給動作、ガス流路の加熱動作、オゾン供給動作、及び真空引き動作が自動で停止されるように各部を制御するシャットダウン機能部３１２とを具備する。【選択図】図２