A fluidized bed reaction device and its application

Abstract

The present invention provides a fluidized bed reaction device and application thereof. The fluidized bed reaction device includes a fluidized bed reactor, the top of the fluidized bed reactor is provided with a catalyst inlet and a product gas outlet, and the bottom is provided with a catalyst outlet and the feed gas inlet; along the axial direction, the fluidized bed reactor is provided with at least two fluidized beds; the bottom of each fluidized bed is provided with a perforated plate; Overflow pipe. By improving the structure of the fluidized bed reaction device, the invention reduces gas back-mixing, effectively stabilizes the fluidized state, and avoids unstable product composition caused by the unstable fluidized bed state; it is applied to methane oxidative coupling reaction, oxygen classification Enter the fluidized bed reactor to avoid deep oxidation of methane and improve the selectivity of C2+ on the premise of ensuring the conversion rate of methane; the fluidized bed reactor can adjust the amount of catalyst and the flow rate of heat exchange medium according to the amount of treated gas to resist load fluctuations strong ability.

Description

technical field [0001] The invention belongs to the technical field of reaction engineering, and relates to a reaction device, in particular to a fluidized bed reaction device and its application. Background technique [0002] Ethylene is the basic raw material for synthetic plastics, synthetic fibers, synthetic rubber, medicines, dyes, pesticides, new chemical materials and daily chemical products, and is the most widely used basic organic chemical raw material. At present, ethylene is mainly obtained in two ways: one is by direct cracking of petroleum-based raw materials such as crude oil and oilfield gas; the other is by further steam thermal cracking of naphtha, a lighter hydrocarbon mixture obtained from petroleum refining. With the increasing shortage of petroleum resources and the increasing demand for ethylene, opening up a new route for ethylene production has become a research hotspot at home and abroad. [0003] In 1982, Keller et al. first reported the results o...

AI Technical Summary

Problems solved by technology

[0009] In a single-stage fluidized bed reactor, the fluidized catalyst particles are in a highly back-mixed state, which is unfavorable for methane conversion and C2+ yield, while the multi-stage fluidized bed process is complicated, and the matching between fluidized states in multiple beds is difficult to control , it is easy to cause large fluctuations in product composition and unstable catalyst circulation. Therefore, it is necessary to provide a new fluidized bed reaction device and its application

Images