Work starting method for catalytic cracking unit
A catalytic cracking device and catalyst technology, which is applied in the direction of catalytic cracking, cracking, petroleum industry, etc., to achieve the effect of saving cost and investment
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Embodiment 1
[0035] Example 1 illustrates the effect of hydrothermal treatment of fresh catalyst under pressurized conditions using the method provided by the present invention.
[0036] A pressurized fixed fluidized bed experimental device was used to simulate the conditions in the start-up stage of the catalytic cracking unit regenerator. Put the MMC-2 fresh catalyst into the fixed fluidized bed, and at the same time, use the air as the fluidized medium, pass it into the bottom of the fluidized bed after being heated to about 350°C by the preheating furnace, and pass through the automatic pressure regulating valve at the outlet of the fixed fluidized bed The fixed fluidized bed pressure is controlled at 0.5MPa. The catalyst in the fixed fluidized bed was heated and stabilized at 650°C by means of electric heating. The water is vaporized and superheated to 400°C in a two-stage heating furnace, and then passed into the bottom of the fluidized bed. The catalyst was hydrothermally treated ...
Embodiment 2
[0038] Example 2 illustrates the effect of using the method provided by the present invention to further increase the pressure of the fresh catalyst for hydrothermal treatment.
[0039] The basic method of the experiment is the same as in Example 1, except that the pressure of the fixed fluidized bed is controlled at 0.7 MPa, and the temperature of the catalyst is controlled at 600°C. The catalyst was hydrothermally treated under the above conditions for 9 hours. The main conditions of the treatment and the microreaction activity of the catalyst after treatment are listed in Table 2.
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