Conversion rate
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At the beginning of last month, the conversion rate in our plant was 99.65%; it gradually declined, reaching 99.26% on November 2nd and 99.14% on November 6th. The amount of alkali consumed for the end-suction process increased significantly, and the temperature difference in the fourth layer of the conversion process rose considerably, from 25 degrees to around 35 degrees. The laboratory technician performed three tests; in each test, the gas concentrations at the inlet and outlet of the tube and shell layers were normal, just as they are when the conversion rate is normal. Could someone give me some advice?
Is the catalyst’s activity declining, or is it the excessive dust that’s reducing the heat exchange efficiency? I’m an amateur
This post was last edited by Shang Xiaoke on 2015-11-11 at 14:16. What are the inlet and outlet temperatures for each section of the converter?
What is the sulfur dioxide concentration in the intake air? It’s possible that the concentration of air entering the system is too low; you can try reducing the amount of air taken in
What is the heat exchange process? It is recommended to check the second conversion.
There are many factors that affect the conversion rate, such as equipment issues, control of gas concentration, changes in raw materials, catalysts, etc. Do you have 4-stage or 5-stage conversion? Please mention the inlet and outlet temperatures for each section. . .
1. First, check the conversion rate for each stage to determine which one is having issues. 2. Examine for any cross-flow of gas between the shell and tube layers of the heat exchanger; it’s best to test the gas entering the system, as this should theoretically be pure sulfur dioxide. Any leakage will cause gas to flow from one stage to another, and in most cases there will be a large amount of sulfur trioxide, which can be easily detected
This post was last edited by hewx888 on 2015-11-17 09:52