What do the fluctuations in the drainage temperature of the gasifier indicate?
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As the title says. What does this indicate?
This indicates that the displacement fluctuates significantly! Low volume means low temperature; high volume means high temperature!
This post was last edited by *aodouzi on 2010-6-30 22:34: 1. Fluctuations in system pressure; 2. Fluctuations in furnace temperature. 3. If slag accumulates in the downcomer, the outlet temperature of the syngas should also fluctuate and be higher, right? 4. The impact of the amount of water drained on temperature isn’t very obvious, so we can’t conduct experiments on this. When less water is drained, the contact time between the syngas and water increases, so the drainage temperature should rise. But when more water is drained, the contact time with water decreases, yet more slag enters the water system, so the temperature should still rise as well. I hope some experts can explain the reason to me. Thank you.
This temperature usually varies very little and is not particularly important; therefore, as long as the liquid level in the gasification furnace does not fluctuate much, there is little need to pay attention to the temperature of the black water from the gasification furnace. Personally, I feel that aside from fluctuations in the vaporizer level, other influencing factors (such as the operating temperature of the vaporizer and system pressure) can be ignored. The original poster is really careful; in the future I will pay more attention to parameters that don’t seem very important at first glance.
If it’s not due to the table, then it’s likely that the temperature of the vaporization furnace is fluctuating. What is the range of these fluctuations? And how frequent are they? Friend on the 3rd floor, you mentioned fluctuations in system pressure; it can be said that these might cause fluctuations in the drainage temperature, but they shouldn’t be considered the main cause. In our company, system pressure fluctuations occur frequently, but we’ve never seen similar fluctuations in drainage temperature. As for the issue you mentioned of slag accumulation in the downcomer, it certainly affects the drainage temperature. To be precise, it depends on the extent of the accumulation, and this can be easily determined by checking the pressure difference gauge at the slag outlet
This post was last edited by *aodouzi on 2010-7-1 18:38. Different pressures correspond to different saturated vapor pressures. If the furnace temperature is 1500, the discharge temperature of the black water will definitely vary depending on the pressure. The effect of the vaporizer level on the drainage temperature should be greater than that of furnace temperature fluctuations.
When the furnace temperature fluctuates little, a high drainage volume at the outlet of the gasification furnace leads to an increase in temperature, while a low drainage volume results in a decrease in temperature. The reason is that there is circulating black water from the lock-hopper circulation pump at the bottom of the gasifier; this water has a low temperature, which affects the temperature of the black water at the outlet of the gasifier.
This post was last edited by *aodouzi on 2010-7-2 21:10. The effect of the drainage flow rate of this gasification furnace on the drainage temperature seems similar to that of a clogged black water pipeline. When the flow rate is low, the speed of flow slows down. If there is no flow, the outlet temperature of the black water from the vaporization furnace will surely decrease gradually. As for the low outlet temperature of the lock-hopper circulation pump you mentioned, it seems that as long as the outlet flow rate of this pump remains unchanged, it should have little impact on the change in the drainage temperature. Only by increasing the outlet flow rate of the lock-hopper circulation pump will its outlet temperature rise, which is certainly due to enhanced heat exchange with the water at the upper level. One more question: when the pipeline gradually gets clogged, does the temperature reading on the thermometer in the pipeline decrease slowly due to less heat exchange?