A kind of regeneration method of butene oxidative dehydrogenation to butadiene adiabatic fixed-bed catalyst
An adiabatic fixed bed, oxidative dehydrogenation technology, which is applied in catalyst regeneration/reactivation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of high adiabatic temperature rise of catalyst, catalyst bed Increased lamination pressure drop, increased regeneration gas power consumption, etc., to achieve good response performance, shorten regeneration time, and reduce the use of water vapor
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Embodiment 1
[0025] like figure 1 As shown, it is a series-type adiabatic two-stage axial fixed-bed reactor, wherein the diameters of the adiabatic first stage and adiabatic second stage reactors are both 3500 mm, and the heights of the adiabatic first stage catalyst bed 3 and the adiabatic second stage catalyst bed 8 are both 600 mm. During the catalyst regeneration process, keep the regeneration gas linear velocity constant in the adiabatic stage 1, the temperature of the feed 2 in the adiabatic stage 1 is regulated by the feed heater 1 in the adiabatic stage 1 stage, and the temperature of the feed 7 in the adiabatic stage 2 stage is mainly regulated by feeding nitrogen gas between stages, and the temperature in the adiabatic stage 2 The oxygen concentration of the feed 7 is mainly adjusted by the feed air between the stages; during the catalyst regeneration process, the outlet temperature of the catalyst bed is always controlled between 300.0 and 700.0°C. , the feed oxygen concentratio...
Embodiment 2
[0031] like figure 1 As shown, it is a series-type adiabatic two-stage axial fixed-bed reactor, wherein the diameters of the adiabatic first stage and adiabatic second stage reactors are both 3500 mm, and the heights of the adiabatic first stage catalyst bed 3 and the adiabatic second stage catalyst bed 8 are both 600 mm. During the catalyst regeneration process, the linear velocity of the regeneration gas in the adiabatic first stage was kept constant, the temperature of the feed 2 in the adiabatic first stage was regulated by the feed heater 1 in the adiabatic second stage, and the temperature of the feed 7 in the adiabatic second stage was mainly fed by nitrogen and carbon dioxide (volume composition 10% nitrogen and 90% carbon dioxide), the oxygen concentration of the adiabatic second-stage feed 7 is mainly adjusted by the inter-stage feed air; during the catalyst regeneration process, the outlet temperature of the catalyst bed is always controlled between 300.0-700.0°C, in...
Embodiment 3
[0037] like figure 2 As shown, it is a chilled-type adiabatic two-stage axial fixed-bed reactor, in which the diameters of the adiabatic first-stage and adiabatic second-stage reactors are both 3500mm, and the catalyst bed heights of the adiabatic first-stage catalyst bed and the adiabatic second-stage catalyst bed are both 600mm. During catalyst regeneration, the linear velocity of regeneration gas in the adiabatic stage 1 is kept constant, the temperature of the feed 2 in the adiabatic stage 1 is regulated by the feed heater 1 in the adiabatic stage 1, and the temperature of the feed 7 in the adiabatic stage 2 is mainly regulated by feeding liquid water between the stages. The oxygen concentration of the stage feed 7 is mainly adjusted by the feed air between the stages; during the catalyst regeneration process, the catalyst bed outlet temperature is always controlled between 300.0-700.0°C. In order to prevent the catalyst bed from overheating, the regeneration process follo...
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