Fluidized bed reaction device and application thereof

A fluidized bed reaction and fluidized bed reactor technology, applied in the directions of organic chemistry, bulk chemical production, chemical instruments and methods, etc., can solve the problems of unfavorable methane conversion rate and C2+ yield, complicated multi-stage fluidized bed process, The catalyst cycle is unstable and other problems, so as to avoid unstable product composition, high heat and mass transfer efficiency, and good gas-solid contact effect.

Active Publication Date: 2021-06-18
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Fluidized bed reaction device and application thereof
  • Fluidized bed reaction device and application thereof
  • Fluidized bed reaction device and application thereof

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Experimental program
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Effect test

Embodiment 1

[0060] This embodiment provides a figure 1 The fluidized bed reaction device includes a fluidized bed reactor.

[0061] The top of the fluidized bed reactor is provided with a catalyst inlet and a product gas outlet.

[0062] The bottom of the fluidized bed reactor is provided with a catalyst outlet 4 and a feed gas inlet.

[0063] Along the axial direction, the fluidized bed reactor is provided with 6 fluidized beds; the bottom of each fluidized bed is provided with an orifice 7-2.

[0064] An overflow pipe 7-1 is arranged between two adjacent fluidized beds, and the overflow pipe 7-1 is used to transport the catalyst particles in the upper layer of the adjacent two fluidized beds to the lower layer.

[0065] The lower part of the orifice plate 7-2 in the fluidized bed reactor is provided with an oxygen-containing gas inlet pipeline 2 .

[0066] The fluidized bed reaction device also includes a gas-solid separation device 5 arranged at the rear end of the product gas outle...

Embodiment 2

[0071] This embodiment provides a figure 2 The fluidized bed reaction device includes a fluidized bed reactor.

[0072] The top of the fluidized bed reactor is provided with a catalyst inlet and a product gas outlet.

[0073] The bottom of the fluidized bed reactor is provided with a catalyst outlet 4 and a feed gas inlet.

[0074] Along the axial direction, the fluidized bed reactor is provided with 6 fluidized beds; the bottom of each fluidized bed is provided with an orifice 7-2.

[0075] An overflow pipe 7-1 is arranged between two adjacent fluidized beds, and the overflow pipe 7-1 is used to transport the catalyst particles in the upper layer of the adjacent two fluidized beds to the lower layer.

[0076] The lower part of the orifice plate 7-2 in the fluidized bed reactor is provided with an oxygen-containing gas inlet pipeline 2 .

[0077] The fluidized bed reaction device also includes a gas-solid separation device 5 arranged at the rear end of the product gas outl...

Embodiment 3

[0084] This embodiment provides a image 3 The fluidized bed reaction device includes a fluidized bed reactor.

[0085] The top of the fluidized bed reactor is provided with a catalyst inlet and a product gas outlet.

[0086] The bottom of the fluidized bed reactor is provided with a catalyst outlet 4 and a feed gas inlet.

[0087] Along the axial direction, the fluidized bed reactor is provided with 6 fluidized beds; the bottom of each fluidized bed is provided with an orifice 7-2.

[0088] An overflow pipe 7-1 is arranged between two adjacent fluidized beds, and the overflow pipe 7-1 is used to transport the catalyst particles in the upper layer of the adjacent two fluidized beds to the lower layer.

[0089] The lower part of the orifice plate 7-2 in the fluidized bed reactor is provided with an oxygen-containing gas inlet pipeline 2 .

[0090] The fluidized bed reaction device also includes a gas-solid separation device 5 arranged at the rear end of the product gas outle...

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Abstract

The invention provides a fluidized bed reaction device and application thereof. The fluidized bed reaction device comprises 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 of the fluidized bed reactor is provided with a catalyst outlet and a feed gas inlet. In the axial direction, at least two layers of fluidized beds are arranged in the fluidized bed reactor. A pore plate is arranged at the bottom of each layer of fluidized bed. An overflow pipe is arranged between every two adjacent layers of fluidized beds. The structure of the fluidized bed reaction device is improved, so that gas back-mixing is reduced, the fluidized state is effectively stabilized, and unstable product composition caused by an unstable fluidized bed state is avoided. The fluidized bed reaction device is applied to a methane oxidative coupling reaction, oxygen enters the fluidized bed reactor in a graded mode, deep oxidation of methane is avoided, and C2 + selectivity is improved on the premise that the methane conversion rate is guaranteed. The fluidized bed reactor can adjust the dosage of a catalyst and the flow velocity of a heat exchange medium according to the gas treatment amount, and the load change resistance is high.

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, medicine, dyes, pesticides, new chemical materials and daily chemical products, and is the most widely used basic organic chemical raw material. Ethylene is currently mainly obtained in two ways, one is through direct cracking of petroleum raw materials such as crude oil and oilfield gas; the other is through steam pyrolysis of naphtha, a relatively light 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 of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/24C07C2/84C07C11/04
CPCB01J8/24C07C2/84C07C11/04Y02P20/52
Inventor 刘姣张战国岳君容崔彦斌许光文
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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