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Double-layer fluidized bed reactor

A fluidized bed reactor and reactor technology, applied in the direction of chemical instruments and methods, chemical/physical processes, etc., can solve the problems of single-layer, double-layer or multi-layer reactor switching, etc., to improve operational stability, improve Conversion rate, the effect of less investment

Active Publication Date: 2014-09-24
CHINA TIANCHEN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems in the prior art, the present invention provides a double-layer fluidized bed reactor, which solves the problem in the prior art that the reactor cannot be switched to a single-layer double-layer or multi-layer reactor according to the reaction situation

Method used

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  • Double-layer fluidized bed reactor

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Embodiment 1

[0036] A double-layer fluidized bed cold model with two catalyst inlets is adopted, the reaction device is operated at normal temperature and pressure, the gas phase is air, and the catalyst is a catalytic cracking catalyst with an average particle size of 84 μm. The diameter of the fluidized bed reactor is about 0.7m, the diameter of the expansion section is 1.2m, and the diameters of the inlet inclined pipe and the external overflow pipe are both 80mm. The total height of the reaction section is 12.5m, the height of the upper and lower layers of dense phase is 3m, the height of the upper dilute phase section is 5m (including the expansion section), and the height of the lower dilute phase section is 1.5m. The catalyst storage capacity of the reactor is 1.5t. The material of the reactor is carbon steel with a wall thickness of 6mm. There are three single-acting slide valves on the two lines of the catalyst inlet and the external overflow pipe to control the pressure balance ...

Embodiment 2

[0038] A double-layer fluidized bed cold model with two catalyst inlets is adopted, the reaction device is operated at normal temperature and pressure, the gas phase is air, and the catalyst is a methanol-to-olefins catalyst with an average particle size of 87 μm. The diameter of the fluidized bed reactor is about 0.7m, the diameter of the expansion section is 1.2m, and the diameters of the inlet inclined pipe and the external overflow pipe are both 80mm. The total height of the reaction section is 12.5m, the height of the upper and lower layers of dense phase is 3m, the height of the upper dilute phase section is 5m (including the expansion section), and the height of the lower dilute phase section is 1.5m. The catalyst storage capacity of the reactor is 1.3t. The material of the reactor is carbon steel with a wall thickness of 6mm. There are three single-acting slide valves on the two lines of the catalyst inlet and the external overflow pipe to control the pressure balance...

Embodiment 3

[0040] A double-layer fluidized bed thermal reactor with two catalyst inlets is used. The reaction device operates at normal temperature and pressure. The gas phase uses industrial methanol after gasification. The catalyst is a methanol-to-olefin catalyst with an average particle size of 87 μm. The diameter of the fluidized bed reactor is about 0.35m, the diameter of the expansion section is 0.55m, and the diameters of the inlet inclined pipe and the external overflow pipe are both 20mm. The total height of the reaction section is 2.0m, and the catalyst storage capacity of the reactor is 150kg. The material of the reactor is carbon steel with a wall thickness of 4mm. There are three automatic regulating valves on the two pipelines of the catalyst inlet and the external overflow pipe to control the pressure balance and catalyst flow. A filter is installed at the outlet of the expansion section to separate the catalyst. The gas phase inlet is equipped with a gas distributor. ...

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Abstract

The invention discloses a double-layer fluidized bed reactor comprising a reaction section and an expansion section, wherein the reaction section is divided into a double-layer structure including an upper layer and a lower layer by a pored baffle; the lower layer of the reactor is connected with an air distributor; the upper layer of the reactor is connected with the expansion section; and the upper layer and the lower layer are connected by an external overflow pipe with a valve. Both the upper layer and the lower layer of the reactor are respectively provided with catalyst inlets; as long as a pipeline is divided into two branch pipes and the two branch pipes are respectively connected with the two catalyst inlets, the reactor can be in operation; and a valve is arranged on the pipeline. When the inlet on the lower layer of the reactor is enabled, the reactor is in operation in a common single-layer fluidized bed; and when the inlet on the upper layer of the reactor is enabled, the reactor is in operation in the double-layer fluidized bed to adjust the stability of the catalyst bed. The double-layer fluidized bed reactor adopts a more flexible convertible double-layer fluidized bed form.

Description

technical field [0001] The invention relates to the field of chemical equipment, and relates to a double-layer fluidized bed reactor. Background technique [0002] The fluidized bed is a bed form in which the fluid passes through the granular solid bed. When the resistance of the fluid flowing through the bed is greater than the weight of the bed particles, the solid particles are in a suspended state and can flow like a fluid. The corresponding reactor is a fluidized bed reactor. In terms of structure, fluidized bed reactors include circulating fluidized bed reactors and fixed fluidized bed reactors. The circulating fluidized bed has continuous feeding and discharging of solid materials, and is used in the reaction process of solid phase processing and catalyst deactivation. The fixed fluidized bed has no continuous feeding and discharging of solid materials, and the solid particles do not change significantly for a long time. [0003] Compared with the fixed bed reactor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/28
Inventor 钱震王海国袁学民孙世谦张蒙左宜赞周明生
Owner CHINA TIANCHEN ENG