Spout type fluidized bed reactor for synthesis of organic silicon

A fluidized bed reactor and organosilicon technology, applied in organic chemistry, chemical instruments and methods, chemical/physical processes, etc., can solve problems affecting normal production, agglomeration of granular silicon powder, etc., and achieve heat transfer rate Stable, small radial and axial temperature difference, avoiding the effect of gas drift

Active Publication Date: 2011-06-01
HOSHINE SILICON IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a spouted fluidized bed reactor for organosilicon synthesis, which overcomes the improper type and design of the gas distributor of the fluidized bed, which causes the granular silicon powder to agglomerate on the distribution plate, which seriously affects the normal operation. Production problems, proposed a spouted fluidized bed reactor suitable for the synthesis and production of organosilicon monomers

Method used

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  • Spout type fluidized bed reactor for synthesis of organic silicon
  • Spout type fluidized bed reactor for synthesis of organic silicon
  • Spout type fluidized bed reactor for synthesis of organic silicon

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Experimental program
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Embodiment 1

[0032] Such as figure 1 As shown, a schematic structural view of an embodiment of the fluidized bed reactor of the present invention, including a reactor body 1, a cyclone separator assembly 2, a tube-and-tube heat exchanger 3, a tube cone-hole combined distributor 4, and a bed return valve 5 And go to fine powder tank valve 6.

[0033] The reactor body 1 includes a reactor bed 12 and an enlarged body 11 located above the reactor bed. The cyclone separation assembly 2 includes a first-stage inner cyclone component 21 , a second-stage inner cyclone component 22 and an outer cyclone separator 23 connected in sequence. The shell and tube heat exchanger 3 is arranged in the reactor bed 12 . Near the bottom of the reactor bed 12, there is also a pipe-cone-hole combined distributor 4. The bed return valve 5 and the fine powder removal tank valve 6 are located at the lower part of the final material leg of the outer cyclone separator 23, and are used to control the amount of fine ...

Embodiment 2

[0039] In a spouted fluidized bed made of plexiglass with a bed diameter F of 300 mm and a bed height H of 4000 mm, the activated carbon particles are fluidized with air, and the average particle diameter dp of the activated carbon particles is 0.355 mm, the maximum The particle size dpmax of the particles is 0.510mm, the cone angle θ of the cone is 90°, the opening diameter on the slope is 3mm, the opening ratio a is 1%, and the diameter dt of the straight pipe is 20mm. When the initial fluidization velocity umf of the particles and the jet fluidization gas volume in the straight pipe are 1.5 to 5.0 times greater than the take-out velocity ut of the carbon particles, when observed with the naked eye, only large and small particles can be seen on the slope of the cone Sliding down smoothly, no carbon particles stay on the distributor, that is, no dead space is generated.

Embodiment 3

[0041] In a hot mold spouted fluidized bed with a bed diameter F of 350 mm and a bed height H of 6000 mm, CH3Cl is used as the fluidized gas to fluidize silicon powder particles at a reaction temperature of 300-310 °C and a reaction pressure of 0.4 MPa. Under the conditions, the synthesis reaction produces organosilicon monomers, the average particle size dp of silicon powder particles is 0.155mm, the particle size dpmax of the largest particle is 0.450mm, the cone angle θ of the cone is 100°, and the hole diameter dor on the slope is 6mm, the opening ratio a is 15%, and the diameter dt of the straight pipe is 25mm. When the fluidization gas volume is greater than the initial fluidization velocity umf of the carbon particles, the sprayed fluidization gas volume in the straight pipe is greater than the carry-out velocity of the silicon particles 1.5 times of ut, the fluidized bed can operate normally. After more than 700 hours of testing, the reaction conversion rate and yield a...

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Abstract

A spout type fluidized bed reactor for synthesis of organic silicon comprises a reactor body, an expanded section, tube bore-hole type combination distributors, cyclone separator components, a back-to-bed valve, a powder-ridding tank valve and tubular heat exchangers, wherein the tube bore-hole type combination distributor is arranged at the bottom of the reactor bed body and comprises a conical gas distributor, a straight tube pore-type distributor and a spouted gas tube; the tubular heat exchangers are arranged in the reactor bed body, heat exchange carriers flowing through the heat exchanging tubes from bottom to top, to achieve single-tube pass heat transfer, so that the heat transfer between the tube surfaces and reacting fluid is even, and radial and axial temperature difference aresmall; particles separated by the cyclone separating device are directly returned back to the bed by the inner and external cyclone separating devices in time and not be taken out of the bed or partial particles are taken out, thereby reducing the catalyst content in the bed and the temperature fluctuation and being beneficial to improving reaction efficiency.

Description

technical field [0001] The invention belongs to the field of multiphase flow reaction engineering, and relates to an organosilicon synthesis device, in particular to a spouted fluidized bed reactor suitable for the direct synthesis of organosilicon monomers. Background technique [0002] At present, the production of organic silicon monomers in industry is usually synthesized by Rochow's direct method. The materials involved in the reaction are mainly methyl chloride gas, silicon powder and copper powder, etc. The fluidized bed reactor used has many unreasonable structures. , so it needs to be improved. Domestic organosilicon monomer synthesis reactors are commonly referred to as fluidized bed reactors, the key parts of which are the gas distributor at the bottom of the bed, the heat exchange device inside the bed and the external cyclone separator. The former mainly determines its The fluidization quality is good or bad, and the latter affects the heat transfer efficiency ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/24C07F7/16
Inventor 王樟茂马国维罗立伟蔡水兵黄伟刘国旺曹华俊
Owner HOSHINE SILICON IND CO LTD
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