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A Visual Miniature Fluidized Bed Reaction Analyzer

A fluidized bed reaction and fluidized bed reactor technology, applied in chemical instruments and methods, chemical/physical processes, investigation stages/state changes, etc., can solve the problem of inability to observe particle morphology, fluidization behavior bubble size, difficult Realize problems such as normal fluidization of ultrafine particles and gas short circuit, and achieve the effect of simple and flexible structure, simple structure and enhanced fluidization performance

Active Publication Date: 2016-03-09
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

Although the two-stage bed overcomes the escape of fine particles from the reaction constant temperature zone, it is still difficult to achieve normal fluidization of ultrafine particles (<30um) or nanoparticles (<100nm), resulting in gas short circuit and instability
[0010] In addition, the fluidized bed reactor disclosed in CN101210916A and CN103364521A is a miniature quartz or metal fluidized bed reactor, and the electric heating furnace supplies heat for the reactor. Furnace, unable to observe the particle morphology, fluidization behavior and bubble size in the reaction state

Method used

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  • A Visual Miniature Fluidized Bed Reaction Analyzer
  • A Visual Miniature Fluidized Bed Reaction Analyzer
  • A Visual Miniature Fluidized Bed Reaction Analyzer

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Embodiment 1

[0067] Taking the methanation reaction process as an example, the specific implementation of the visualized micro fluidized bed reaction analyzer of the present invention is further described.

[0068] In this embodiment, a coating visible heating furnace with an observation window is used as a heating device for the methanation reaction. The outer wall of the inner tube of the visualization heating furnace is provided with a spiral groove. The heating element is made of Cr20Ni80 high temperature resistant resistance wire with a diameter of 1.0mm. Some are provided with observation windows without metal coating along the radial direction. The heating power of the heating furnace is 1000W, and the maximum heating temperature is 950°C.

[0069] The methanation catalyst used is Ni-Al 2 o 3Catalyst (the mass fraction of Ni is 40wt%), the particle diameter is 70-90μm; the inner diameter of the fluidized bed reactor used is 15mm; the fluidization gas velocity of the fluidization ...

Embodiment 2

[0072] Taking hydrogen reduction of ultrafine nickel oxide as an example, the specific implementation of the visualized micro fluidized bed reaction analyzer of the present invention is further described.

[0073] In this embodiment, a visible heating furnace with a coating with an observation window is used as a heating device for removing NOx from the flue gas of a catalytic cracking (FCC) regenerator. The outer wall of the inner tube of the visualization heating furnace is provided with spiral grooves. The heating element is Cr20Ni80 high temperature resistant resistance wire with a diameter of 0.5mm. The thermal insulation coating on the outer wall of the middle tube is a gold-plated coating with a thickness of 50nm. In the central part of the heating furnace, there is an observation window without metal coating along the axial direction. The heating power of the heating furnace is 500W, and the maximum heating temperature is 600°C.

[0074] The ultra-fine nickel oxide us...

Embodiment 3

[0077] Taking hydrogen reduction of nano-iron oxide as an example, the specific implementation of the visualized micro fluidized bed reaction analyzer of the present invention is further described.

[0078] In this embodiment, a visible heating furnace with a coating with an observation window is used as a heating device for the hydrogen reduction reaction of nanometer iron oxide. A support frame is provided on the outer wall of the inner tube, and there is a card slot on the support frame. The heating element is a silicon-molybdenum rod with a diameter of 5.0 mm. The thermal insulation coating on the outer wall of the middle tube is a nickel-tungsten alloy coating with a thickness of 20 nm. In the central part of the heating furnace, there is an observation window without metal coating along the radial direction. The heating power of the heating furnace is 4000W, and the maximum heating temperature is 1050°C.

[0079] The nanometer iron oxide used is iron oxide powder produc...

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Abstract

The invention relates to a visualizable micro fluidized bed reaction analyzer. The analyzer includes a visualizable heating furnace and a micro fluidized bed reactor placed in the visualizable heating furnace, a gas inlet port of the micro fluidized bed reactor is connected with a gas flow meter, a gas outlet is connected with a gas analysis system, the visualizable heating furnace comprises a furnace body, the furnace body is successively provided with an inner tube and a middle tube, the outer wall of the inner tube is provided with a heating element, the outer wall of the middle tube is provided with a thermal insulation coating, and the longitudinal middle part of the thermal insulation coating is provided with a observation window. The analyzer is simple in structure and small in size, can be applied to the measurement of reaction kinetic parameters of a multiphase complex system, is close to the intrinsic kinetics, and also can be used in the field of fluidization for observation flow and fluidization behaviors of particles, bubbles and other multiscale structures in a heating state.

Description

technical field [0001] The invention relates to a micro fluidized bed reaction analyzer used for scientific research in the fields of chemistry, chemical industry, metallurgy, biology and the like, in particular to a visualized micro fluidized bed reaction analyzer applied in the field of fluidization. Background technique [0002] Particle fluidization technology has the characteristics of mass transfer, fast heat transfer, and uniform gas-solid reaction. It has been widely used in traditional and emerging industries such as coal chemical industry, petrochemical industry, iron and steel metallurgy, biomedicine, and nanomaterial preparation. and an important means of material synthesis. In the gas-solid fluidized bed, the acquisition of dynamic fluidization characteristics such as the flow behavior of single particles and particle aggregates, the fluidization quality, the size of the bubbles, and the state of motion can be used for the design and scale-up of the gas-solid fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/12B01J8/24
Inventor 李军朱庆山李洪钟芦亚军
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI