Circulating accelerating pipe used in annular fluidized bed reactor

Abstract

The invention provides a circulating accelerating pipe used in an annular fluidized bed reactor, which comprises a 90-degree elbow pipe, a riser pipe, a reducing joint, a three-way pipe, a straight-through pipe joint, a connecting pipe, a first nut, a conical pipe, an O-shaped ring, a gasket and a second nut. The upper end of a main pipe of the three-way pipe is vertically successively connected with the reducing joint, the riser pipe and the 90-degree elbow pipe, the lower end of the main pipe of the three-way pipe is vertically successively connected with the straight-through pipe joint and the connecting pipe, the straight-through pipe joint is fixedly connected with the connecting pipe via the first nut, the conical pipe is mounted in the straight-through pipe joint, the lower end of the conical pipe is clamped in a sunken table at the lower end of a center through hole of the straight-through pipe joint, the top end of the conical pipe is higher than the axis of a side branch pipe of the three-way pipe, the O-shaped ring is disposed between the lower end surface of the conical pipe and the upper end surface of the connecting pipe, the lower end of the connecting pipe is a spraying nozzle, and the side branch pipe of the three-way pipe is an air inlet of the circulating accelerating pipe. The conical pipe is added in the circulating accelerating pipe, so that fluid circulation can be accelerated, and the conversion rate of objective products is improved.

Description

technical field [0001] The invention relates to a speed-up tube, in particular to a circulation speed-up tube used in an annular fluidized bed reactor, and belongs to the technical field of fluidized bed reactors. Background technique [0002] The fluidized bed reactor is a reactor that uses gas or liquid to pass through the granular solid layer to keep the solid particles in a suspended state and perform a gas-solid phase reaction process or a liquid-solid phase reaction process. When used in a gas-solid system , also known as ebullated bed reactor. Fluidized bed technology has been widely used in many industrial fields due to its unique advantages, such as efficient heat and mass transfer, uniform temperature field, large particle processing capacity, and wide operating range. And there are still very good industrial prospects. However, there are still many disadvantages in the fluidized bed: 1) due to the violent circulation and agitation of solid particles and air bubb...

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Problems solved by technology

Although spouted beds can solve the problems of fluidized beds to

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