Analysis of the causes of air preheater blockage in a coal fired power plant and research on treatment measures
In order to effectively solve the problem of air preheater blockage in coal-fired power plants and improve the operational efficiency of coal-fired boilers,based on the statistical analysis of the operating parameters of the air preheater in the target coal-fired power plant for the past 6 months,the composition of the blockage was analyzed using ICP-AES,XRF and gravimetric methods to identify the main reasons for the blockage of the air preheater.Chemical cleaning experiments were conducted on the blockage of the air preheater.The results indicate that the flue gas resistance of the air preheater in coal-fired power plants has significantly increased recently,leading to serious blockage of the air preheater.The content of ammonium bisulfate in the blockage is the highest(up to 48.2%),and there are also many sulfur-containing deposits such as calcium sulfate and ammonium sulfate,which is the main reason for the blockage of the air preheater in the target coal-fired power plant.The composite cleaning agent QX-12 has the best cleaning effect on the blockage of the air preheater in the target coal-fired power plant.As the concentration of the cleaning agent,pH value of the cleaning solution,cleaning temperature,and cleaning time continue to increase,the cleaning rate gradually increases.When the concentration of composite cleaning agent QX-12 is 0.02mol·L-1,the pH value of the cleaning solution is 10,the cleaning temperature is 60℃,and the cleaning time is 30 minutes,the cleaning rate can reach 88.6%,and the cleaning effect is good.
coal fired power plantsair preheaterreasons for blockageinfluencing factorsgovernance mea-sures
万方数据
维普
