Method and device for cyclically utilizing methanol-to-olefin fine catalyst powder

Abstract

The invention discloses a method and a device for cyclically utilizing a methanol-to-olefin fine catalyst powder. The method comprises the following steps: S1. conveying the fine catalyst powder in a fine catalyst powder storage tank to a regenerator through an airtight conveying pipeline, and removing coke in the fine catalyst powder in the regenerator through a coking reaction; and S2. conveying the fine catalyst powder subjected to the coking reaction to a methanol-to-olefin reactor, using the fine catalyst powder for preparation for a catalyst, or conveying the fine catalyst powder to a residue field for landfill. Through applying the technical scheme of the invention, the fine catalyst powder subjected to the coking reaction is basically pollution-free to environment and soil. In addition, the fine catalyst powder subjected to the coking reaction is conveyed to the methanol-to-olefin reactor to realize cycle thereof between the regenerator and the methanol-to-olefin reactor, and the fine catalyst powder provides lubrication action on the fluidization of the catalyst between the regenerator and the methanol-to-olefin reactor during the cycle process, thus the stable and safe running of the device is benefited, and the shutdown of the device due to defluidization between the regenerator and the methanol-to-olefin reactor is reduced.

Description

technical field [0001] The invention relates to the technical field of chemical production, in particular to a method and a device for recycling the fine powder of methanol-to-olefins catalyst. Background technique [0002] With the continuous and rapid development of my country's industrial and agricultural economy, the market demand for basic organic raw materials such as ethylene and propylene is increasing. In my country, ethylene and most of propylene are mainly produced by steam cracking using naphtha and light diesel oil as raw materials, and part of propylene is obtained through rectification of liquefied petroleum gas, a by-product of catalytic cracking. However, due to the shortage of petroleum resources and insufficient steam cracking capacity, my country's ethylene production and propylene production have been in short supply for a long time, so chemicals produced from ethylene and propylene (such as polyethylene, polypropylene, ethylene glycol, etc.) The number ...

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Problems solved by technology

[0006] The present invention aims to provide a method and device for recycling the fine powder of methanol-to-olefin catalyst, so as to solve the technical problem that the fine powder of methanol-to-olefin catalyst will pollute the environment in the prior art

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