ABSTRACT
The accurate, repeatable, and verifiable measurement of SO3/H2SO4 is significant to the reliability operation of coal-fired power plants, as well as environment protection and human health. Although the amount of SO3 in flue gas is very small, and its chemical property is extremely active, the measurement of SO3/H2SO4 is difficult and problematic. The measurement errors of controlled condensation method for SO3/H2SO4 in flue gas were evaluated with a sampling system based on dilute sulfuric acid heating method. In order to improve the test accuracy of this method, the effects of water bath temperature, flue gas sampling flow rate, and spiral condensing tube structure parameters (inner diameter and length of spiral condensing tube) on the recovery efficiency of SO3/H2SO4 were investigated. The results indicate that the recovery efficiency fluctuates in the range between 84.1% and 91.6%, with the water bath temperature increasing from 40°C to 90°C. As the flue gas sampling flow rate increases from .5 L/min to 4 L/min, the recovery efficiency of SO3/H2SO4 shows a gradual tendency of increasing, and the recovery efficiency can be high up to 98.4%. When the inner diameter of the spiral condensing tube increases from 3 mm to 10 mm, the recovery efficiency of SO3/H2SO4 decreases gradually. The recovery efficiency of SO3/H2SO4 increases gradually with the spiral condensing tube length increasing from 900 mm to 2000 mm.
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Yangjie Qian
Yangjie Qian is currently studying at the School of Energy and Mechanical Engineering, Nanjing Normal University. The research area is emission control technology for flue gas pollutants.
Feihan Chen
Feihan Chen graduated from Nanjing Normal University with a master’s degree in engineering. The research area is emission control technology for flue gas pollutants.
Guiling Xu
Guiling Xu graduated from Southeast University with a Ph.D. in engineering and is currently an associate professor at Nanjing Normal University. The main research directions are area is emission control technology for flue gas pollutants, as well as gas-solid two-phase flow and related numerical simulation research.
Qi Zhang
Qi Zhang graduated from Southeast University with a Ph.D. in engineering and is currently an associate professor at Nanjing Normal University. The main research areas are fluidization theory and application, and emission control technology for flue gas pollutants.
Ping Lu
Ping Lu graduated from Southeast University with a Ph.D. in Engineering and is currently a professor at Nanjing Normal University. The main research directions are the theory and technology of controlling multiple pollutants in flue gas, biomass thermochemical conversion and utilization technology, solid waste energy and resource utilization technology, fluidized bed combustion theory and technology, multiphase flow and numerical simulation.