The “Ultraphotometric Absorber H2S Concentration On-line Measuring Instrument†and “UV-IS UV Spectrophotometry SO2 Concentration On-line Measuring Instrument†developed by Nanhua Research Institute have passed the technical appraisal organized by the Science and Technology Development Department of the Group.
î ‹î ‹ "Ultraviolet luminosity absorption H2S concentration online measuring instrument" solves the online measurement problem of hydrogen sulfide concentration in the acid gas of the furnace entering the Claus furnace in the Claus sulfur recovery unit. The meter is designed with a new pulse-powered circuit and a high-intensity UV source with an auxiliary cathode for a lifetime of more than three years. The high temperature measuring cell has been developed to avoid condensation of the sample gas. The single-cell, single-light path and no moving parts make the photometer simple in structure and reliable in operation. The three-year industrial test results of the online measuring instrument in Yangzi Petrochemical Aromatics Plant and olefins plant show that the analysis results are accurate, stable and easy to use, and can meet the requirements of on-line analysis of H2S concentration in production operations.
"UV-IS UV absorbance method for SO2 concentration online measuring instrument" has developed a high-intensity ultraviolet light source with a life span of up to two years. The instrument is controlled by electric heating program, with automatic balance, automatic zero return and fault diagnosis function, which realizes long-term stable operation. The instrument adopts single-cell and single-light path design, which has simple structure and convenient maintenance. Developed a three-stage dust sampling system suitable for coal-fired boiler installations with independent intellectual property rights, which solved the problem of dust and water removal in coal-fired boiler gas samples. The industrial test conducted by the measuring instrument in Yangzi Petrochemical Thermal Power Plant and Nanhua Power Plant shows that the analysis results are accurate, stable and easy to use, and meet the requirements of on-line analysis of SO2 concentration in production operations.
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