Visual fluidized bed reaction analysis system

A technology of fluidized bed reaction and fluidized bed reactor, which is applied in the field of visual fluidized bed reaction analysis system in the field of fluidization, can solve the problems of large furnace diameter, long distance between inner tube and outer tube, magnetic field coil weight and Volume increase and other problems, to achieve the effect of simple and flexible structure, enhanced fluidization performance, and simple structure

Inactive Publication Date: 2015-01-28
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the furnace body of this patent is composed of three quartz tubes, inner, middle and outer, as well as a furnace cover and a furnace bottom, and has a complex structure.
On the one hand, the diameter of the furnace body is large, and the distance between the inner tube and the outer tube is far away, which is not conducive to close-range visual observation
On the other hand, the furnace bottom and the furnace cover are connected as a whole through the support rod, and the outer tube cannot be rotated, which is not conducive to adjusting the angle of the observation window and affects the practicability of the product
Moreover, thermocouples, heating furnace wires and power cord connectors are located inside the furnace cover, resulting in consumables such as thermocouples,

Method used

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Examples

Experimental program
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Example Embodiment

[0075] Example 1

[0076] Taking the methane-carbon dioxide reforming reaction process as an example, the specific implementation of the visualized fluidized bed reaction analysis system of the present invention is further described.

[0077] In this embodiment, a film-coated visible heating furnace with an observation window is used as a heating device for methane-carbon dioxide reforming 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 1.0 mm. The thermal insulation coating on the outer wall of the outer tube is a gold-plated coating with a thickness of 50 nm; Some are provided with observation windows without metal coating along the radial direction. The heating power of the heating furnace is 2000W, and the maximum heating temperature is 950°C.

[0078] The methane reforming catalyst used is Ni-Co-Al 2 o ...

Example Embodiment

[0080] Example 2

[0081] Taking the carbon monoxide methanation reaction as an example, the specific implementation of the visualized fluidized bed reaction analysis system of the present invention is further described.

[0082] In this embodiment, a coating visible heating furnace with an observation window is used as a heating device for the carbon monoxide methanation reaction. 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 1.0mm. The thermal insulation coating on the outer wall of the outer tube is silver-plated coating with a thickness of 100nm. 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.

[0083] The methanation catalyst used is Ni-Al 2 o 3 Catal...

Example Embodiment

[0084] Example 3

[0085] Taking hydrogen reduction of nanometer iron oxide as an example, the specific implementation of the visualized fluidized bed reaction analysis system of the present invention is further described.

[0086] 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 5.0mm. The thermal insulation coating on the outer wall of the outer tube is a nickel-tungsten alloy coating with a thickness of 20nm. 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.

[0087] The nanometer iron oxide used is t...

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Abstract

The invention relates to a visual fluidized bed reaction analysis system. The system comprises a visual heating furnace and a fluidized reactor placed in the visual heating furnace; a gas inlet of the fluidized bed reactor is connected with a gas flowmeter, a gas outlet is connected with a gas online analysis device; the visual heating furnace comprises a furnace body, the furnace body is orderly provided with an inner tube and an outer pipe from inside to outside; the outer wall of the inner tube is provided with a heating element, the outer wall of the outer tube is provided with an insulation coating, and an observation window is formed on a longitudinal middle part of the insulation coating; the outer tube is capable of rotating along a round groove to facilitate the view angle adjusting. The analysis system disclosed by the invention is simple in structure, small in volume, can be applied to measuring a reaction kinetic parameter of a multi-phase complex system, and approaches to intrinsic kinetics; and the system can be used for the fluidization field to observe the flowing and fluidization behavior of multi-scale structure such as particles and bubbles under the heating state.

Description

technical field [0001] The invention relates to a visualized fluidized bed reaction analysis system for scientific research in the fields of energy, chemical industry, metallurgy, biology, materials, etc., in particular to a visualized fluidized bed reaction analysis system applied in the field of fluidization. Background technique [0002] The fluidized bed reactor based on particle fluidization technology has the characteristics of mass transfer, fast heat transfer rate, uniform bed temperature, etc., and has been widely used in traditional and Emerging industry has become an important technical means to study gas-solid reaction and material synthesis. But in the gas-solid bubbling fluidized bed, the gas will form bubbles, and the particles will form agglomerates due to the inelastic collision between particles, the adhesion of particles during the reaction process, the liquid bridge and the strong van der Waals force of fine particles. The existence of these heterogeneou...

Claims

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Application Information

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IPC IPC(8): G01N25/00
Inventor 李军朱庆山李洪钟芦亚军
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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