MTO water replenishment issue
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What determines the amount of water added in MTO, and what determines the amount of stripping steam used in the stripping section?
Theoretically, water and steam make up 20% in total, which can improve the selectivity of low-carbon olefins; however, too much water will increase the load on the vaporizer, especially under full-production conditions. The amount of water and vapor added is generally determined based on the load of the carburetor and the inlet linear velocity of the cyclone separator; too high a linear velocity can lead to increased catalyst loss.
The amount of stripping steam in the stripping section is adjusted primarily based on the density of that section; if the stripping effect is poor, the amount of oxides in the reaction gas will increase.
Air replenishment is done after the carburetor, while water replenishment is related to the load on the carburetor. Could you explain this? What amount of water is needed for a certain level of load? The amount of steam in the stripping section is determined based on the efficiency of stripping. How is the quality of stripping assessed? What density level and what level of oxides indicate poor stripping efficiency?
Water is added in the methanol buffer tank, which increases the load on the vaporizer
The several units currently in operation basically do not require water addition, as adding water has a significant impact on the reaction temperature. To maintain the reaction rate, low partial pressure, and appropriate water ratio, dilution steam is used instead
1111111111.. I think the amount of stripping steam is determined first and foremost to strip out substances entrained in the catalyst. . 2 refers to the amount of catalyst in the stripping section; to ensure better circulation between the two units, the catalyst amount in the stripping section is generally kept between 3 and 5 tons. . 3 is the one that serves to hydrate. 2222222222，。 The water addition should be kept at 20% of the appropriate level; for a MTO-grade methanol feed of 250, the total amount of water required is 50 tons. The water content in MTO-grade methanol is generally 5%, so 250 * 5% = 12.5 tons. . The water recycled from the sewage stripping tower is generally 7 tons. . The total amount of stripping steam is generally 2 tons. . . . . The required supplementary steam amount is 50-12.5-7-2=30.2t. . . . That’s how it’s calculated