Catalytic triple spin, quadruple spin, spent catalyst tank
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The deactivated catalyst moves from the three-spinner to the waste catalyst tank, enters the four-spinner from the top of the waste catalyst tank, and the gas at the top of the four-spinner is sent to the flue through a critical nozzle. Why is it designed this way? 》? Is the function of the critical nozzle to facilitate better separation of three swirls and four swirls?
A critical nozzle is used to maximize the triple swirl efficiency by ensuring a certain amount of air leakage. Your guess is reasonable
This post was last edited by Refiner on 2017-3-2 08:44. The waste catalyst recovered by the three-spinner system carried some flue gas into the three-spinner waste catalyst tank, resulting in an increase in pressure within that tank. If there is no critical nozzle, the pressure in the three-spin waste catalyst recovery tank will rise to match the pressure inside the three-spin unit, resulting in a severe decrease in the recovery efficiency of the three-spin unit. If the critical nozzle is too large, the pressure in the three-spin recovery tank becomes too low, which breaks the material seal of the three-spin leg; as a result, the recovery efficiency of the three-spin system drops significantly. A large amount of flue gas carrying catalyst enters the flue, causing environmental pollution due to the critical nozzle, and operational fluctuations may occur if desulfurization and denitrification systems are present downstream. Therefore, the aperture of the critical nozzle must be properly designed