Multi-channel riser reaction device and application thereof

Abstract

The invention provides a multi-channel riser reaction device and application thereof. The reaction device comprises at least three riser reactors, a sedimentation device, a gas-solid separation device and a material returning device, wherein the riser reactors are arranged in parallel, and heat transfer is performed between the adjacent riser reactors; the upper part of the riser reactor is connected with the bottom of the sedimentation device, and a discharge hole of the riser reactor is higher than a discharge hole in the bottom of the sedimentation device; the bottom of the riser reactor is connected with a discharge hole of the material returning device; and a feed gas inlet pipeline is arranged at the bottom of the riser reactor. The at least three riser reactors are connected in parallel so as to be suitable for the cascade reaction with strong heat absorption/heat release characteristics, and through the gap heat transfer of each riser reactor, the bed temperature of the riser reaction zone is uniform, such that the isothermal reaction process is easily achieved, and the selectivity of the target product is further improved.

Description

technical field [0001] The invention belongs to the fields of chemical process design and natural gas chemical industry, and relates to a reaction device and its application, in particular to a multi-channel riser reaction device and its application. Background technique [0002] The fluidized bed catalytic reactor adopts fine particles, which can effectively eliminate the internal diffusion resistance and improve the effective surface utilization rate; at the same time, the gas and solid in the bed are violently mixed and contacted, and the heat and mass transfer performance is good, so it is widely used in the endothermic / exothermic reaction process. . However, the gas-solid back-mixing in the bubbling fluidized bed reactor is serious, which causes the gas flow to deviate from the plug flow (plug flow) seriously, which is unfavorable to the conversion rate and selectivity of the reaction. At present, the methods to solve the backmixing problem of bubbling fluidized bed ma...

AI Technical Summary

Problems solved by technology

However, there are certain difficulties in engineering scale-up of the jet loop reactor. During the large-scale process, the inner circulation of the jet loop reactor will cause a certain amount of gas-solid back-mixing in the bed, thereby reducing the selectivity and yield of the target product; However, during the mixing, continuous removal and introduction of solids, it is easy to cause inconsistent particle retention and reduce the average conversion rate of solids at the outlet.

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