Reasons for the decline in heat transfer efficiency in the convection chamber of hydrogen production converters
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The flue gas temperatures at the inlet and outlet of the convection chamber in the hydrogen production converter are continuously rising; the outlet temperature has increased from around 190 degrees initially to 216 degrees at present, while the inlet temperature has now risen to around 900 degrees. However, the temperatures after heat exchange in various sections of the convection chamber show no upward trend. Therefore, it is suspected that the heat exchange efficiency in these sections of the converter has declined. Please help analyze the reasons for this.
A few random thoughts for reference: 1. Dust accumulation in the convection section might be a common cause. 2. An imbalance in the air-to-fuel ratio could be the main reason. 3. Changes in the fuel composition, or the absence of soot blowers or their improper operation, may also be contributing factors
The convective chamber lining may have fallen off； Dust accumulation in the convection chamber ； Deposit buildup on fins ； Test the flue gas for any leaks
If a heat pipe air preheater is used and has been in operation for about 2 years, then the heat pipes have failed.
What are the causes of failure in the heat-tube air preheater of a converter?
There is dust in the combustion air, which can easily cause scaling and blockage in the air preheater. It affects heat exchange and the flow of combustion air. A filter can be added at the fan inlet.
It is possible to increase both the blower pressure and the frequency conversion of the exhaust fan, thereby increasing the flow rate of hot air while ensuring that the negative pressure in the furnace remains within the range required by the process.