Is pressure related to residence time? ?
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In the pressurized gasification process, is there a relationship between pressure and residence time? ? What methods are commonly used to control residence time? ?
Reducing gas production and increasing the pressure in the gasifier can both increase the residence time
Does increasing pressure not make the gas flow faster?
Increasing the system pressure and raising the height-to-diameter ratio of the equipment are effective ways to increase the residence time of the material. A high gasification pressure can increase the reaction rate and the residence time of the reaction products within the gasifier, thereby raising the carbon conversion rate and increasing the production capacity of a single gasifier. Someone upstairs said, “Doesn’t increasing pressure mean faster gas flow?” ”It’s one-sided; when we talk about increasing pressure, we mean the pressure of the entire production system, not just the pressure of that particular device. If only the pressure of that device is increased, then the pressure difference between the upstream and downstream systems increases, resulting in faster gas flow. Although reducing gas production can, under certain conditions, increase the residence time of the unreacted raw materials, this is achieved at the cost of reduced output, and therefore it is generally not adopted. However, if the pressure drop is too low, it can also help to increase the residence time of the material, as a low pressure slows down the reaction rate, reduces the pressure difference across the system, and diminishes the force driving the material toward the next processing stage. This post was last edited by wbp on 2009-2-5 11:15.]