Agent-unloading device system for methanol-to-olefin reactor of fluidized bed

Abstract

The invention discloses an agent-unloading device system for a methanol-to-olefin reactor of a fluidized bed, which comprises a fluidized bed reaction device. The fluidized bed reaction device comprises a fluidized bed reactor, a feeding pipeline and a catalyst regenerative circulating system which is connected to the fluidized bed reactor; the bottom of the fluidized bed reactor is connected to a catalyst storage tank through an agent-unloading pipeline; and an agent-unloading valve is arranged on the agent-unloading pipeline. With the help of the agent-unloading device system, a catalyst unloading problem of a methanol-to-olefin process bed reactor for the fluidized bed is solved, a catalyst is completely unloaded in an MTO (Methanol To Olefin) production process, an overhauling speed for equipment during the production process is efficiently promoted, the production cost is lowered, and production requirements for FMTP (Fluidized-bed Methanol To Propylene), MTO and other bed reactors of the fluidized bed are met.

Description

[0001] technical field [0002] The invention relates to an unloading device system for a fluidized bed methanol-to-olefin reactor. [0003] Background technique [0004] Fluidized bed is a common process in petrochemical catalytic cracking (FCC) units, generally divided into two types: riser reactor and bed reactor. In recent years, many of the latest technologies such as methanol to olefins (MTO) and methanol to propylene (MTP) developed at home and abroad adopt fluidized bed technology. The loading and unloading of the catalyst in the fluidized bed reactor is the primary condition and key operating point of this type of process production. Because catalysts account for relatively large production costs, especially for MTO and MTP processes, the catalysts for such processes have high technical content and are expensive. Therefore, how to reduce catalyst loss and recover catalyst is the prerequisite for the operation of fluidized bed production equipment. Catalyst unloa...

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Problems solved by technology

[0009] The invention solves the problems that the maintenance schedule is seriously affected and the production cost is high due to the fact that the reactor has no separate agent unloading line, and the reactor volume space of the device is relatively large. After shutdown, a large amount of catalyst is still accumulated in the reactor.

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