Reactor or mixer with micromesh structure

A technology of micro-sieves and reactors, applied in fluid mixers, mixers, chemical instruments and methods, etc., can solve the problems of low mixing efficiency, long reaction cycle, poor mixing effect, etc., and achieve large mass transfer area , short mass transfer distance and large processing capacity

Active Publication Date: 2010-08-18
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the mixing problem is not solved well, or the mixing efficiency is low, the reaction cycle will be long, the processing capacity of the reactor per unit volume will be low, and the reactor will not be easy to control
For the reaction process with side reactions, poor mixing effect will lead to low selectivity of the reactor

Method used

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  • Reactor or mixer with micromesh structure
  • Reactor or mixer with micromesh structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A single-channel micro-reactor with a micro-sieve structure is used to prepare nano-barium sulfate particles. Among them, the hydraulic diameter of the micro-sieve is 15 μm, the opening rate is 5%, and the hole spacing is 0.3 mm. The mixing channel is 1 mm wide and 0.2 mm high. Sodium sulfate solution is used as the first fluid, and its distribution chamber volume is 9 times of the total volume of the mixing channel, and barium chloride is used as the second fluid, and its distribution chamber volume is 0.4 times of the total volume of the mixing channel, and the volume of the product collection chamber is 1 times the total volume of the mixing channel. The average particle size of the reaction product nano barium sulfate is 42nm.

Embodiment 2

[0019] Amidation pre-mixing reaction is carried out by using a 20-channel micro-reactor with a micro-sieve structure. Among them, the hydraulic diameter of the micro-sieve is 10 μm, the opening ratio is 25%, and the hole spacing is 1 mm. The mixing channel is 8mm wide and 15mm high. CCA n-hexane solution is used as the first fluid, and its distribution chamber volume is 20 times of the total volume of the mixing channel. Fuming sulfuric acid enters the mixing channel as the second fluid through the sieve, and its distribution chamber volume is 20 times of the total volume of the mixing channel. 2.5 times, the volume of the product collection chamber is twice the total volume of the mixing channel. The reaction selectivity was 95%.

Embodiment 3

[0021] A micro-reactor with a micro-sieve structure of 1000 channels is used to carry out the preparation reaction of nano-calcium carbonate. Among them, the hydraulic diameter of the micro-sieve is 1000 μm, the opening ratio is 1%, and the hole spacing is 3 mm. The mixing channel is 100mm wide and 20mm high. Ca(0H) 2 With aqueous solution as the first fluid, the distribution chamber volume is 100 times the total volume of the mixing channel, CO 2 -N 2 As the second fluid, the mixed gas passes through the sieve hole and enters the mixing channel. The volume of the distribution chamber is 5 times the total volume of the mixing channel, and the volume of the product collection chamber is 10 times the total volume of the mixing channel. The reaction product is calcium carbonate particles with an average particle diameter of 61nm and good monodispersity.

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Abstract

The invention provides a reactor or a blender with micro sieve mesh structure, which relates to the fluid micro dispersion technology and equipment. The invention contains micro sieve mesh structure, a hybrid channel and a fluid distribution chamber, and utilizes the micro sieve mesh to disperse one fluid to another fluid in a form of micron-sized drop or bubble, the blending and reaction processof the drop and the bubble which have high dispersion and high specific surface are rapidly finished in the hybrid channel, so the invention is a novel microstructure reaction vessel or blender whichutilizes the micro sieve mesh structure to realize the reaction or blending of homogeneous phase or non homogeneous phase fluid. The invention is characterized by simple processing, convenient operation, large treating capacity for unit volume and so on and can be widely applied to a number of fields like the chemistry, chemical engineering, petrochemistry, medicine, foodstuff, etc.

Description

technical field [0001] The invention relates to a reactor or a mixer, in particular to fluid micro-dispersion technology and equipment, which is used in the mixing or reaction process between different fluids, and belongs to the technical field of chemical and chemical equipment. Background technique [0002] Traditional chemical reactors or mixers mainly use stirring to mix. Although the principle of this mixing method is simple, because the mixing scale in the equipment is at the millimeter level or even larger, the mixing efficiency is low and the energy consumption of the mixing process is low. Big question. Although tower-type, tubular-type reactors or mixers in the traditional sense have their own characteristics compared with fully mixed tanks, they also have the problem of low mixing efficiency because they are also in the range of millimeter-scale mixing. In addition, because these devices adopt the method of empirical amplification, there are problems such as long...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F5/06B01J19/00
Inventor 王凯吕阳成骆广生邵华伟
Owner TSINGHUA UNIV
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