Dispersing device for micron/nano-particle suspension

Abstract

The invention discloses a dispersing device for micron / nano-particle suspension. The device comprises an ultrasonic trough, a liquid inlet pipe, an outlet pipe and several distribution pipes. The ultrasonic trough is loaded with a water body and is provided with transducers in electric connection with an ultrasonic generator. The distribution pipes are disposed inside the ultrasonic trough, and the liquid inlet ends of the distribution pipes are all communicated with the inlet pipe, while the outlet ends are all communicated with the outlet pipe. Making use of ultrasonic cavitation effect, the device of the invention disperses the suspension flowing in the circulating pipes (including the liquid inlet pipe, the outlet pipe and the distribution pipes). As suspension within the distribution pipes is in a continuous renewal state, so the suspension for production can be maintained at a stable disperse state for a long time. Due to the small cross-section, large number of the distribution pipes and the large total superficial area of the distribution pipes, a small dispersing device can disperse a large volume of suspension used for production as long as to maintain certain flow velocity. Able to be installed in an independent equipment room, the device of the invention has reduced energy consumption, cost and noise, and simultaneously plays a role in heat transfer for the suspension used for production.

Description

technical field [0001] The invention relates to a liquid dispersing device, in particular to a dispersing device for micro / nano particle suspension. Background technique [0002] The particle size of micro / nano particles is small, the surface energy is high, and there is spontaneous agglomeration phenomenon in liquid medium, and the agglomeration phenomenon reduces the characteristic advantages of micro / nano particles, making the actual application effect of micro / nano particles in liquid medium poor; A simple method is to add an appropriate amount of dispersant to the micro / nano particle suspension and disperse it by physical methods. Although the aggregates can be deagglomerated, agglomeration will occur again after a certain period of time or during production and use. [0003] At present, the equipment and devices to solve the above problems mainly include mechanical stirring devices, ultrasonic equipment and compressed air stirring devices. Among them, mechanical stirri...

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Problems solved by technology

[0002] The particle size of micro / nano particles is small, the surface energy is high, and there is spontaneous agglomeration phenomenon in liquid medium, and the agglomeration phenomenon reduces the characteristic advantages of micro / nano particles, making the actual application effect of micro / nano particles in liquid medium poor; A simple method is to add an appropriate amount of dispersant to the micro / nano particle suspension and disperse it by physical methods. Although the aggregates can be deagglomerated, after a certain period of time or during production and use, agglomeration will occur again

[0003] At present, the equipment and devices to solve the above problems mainly include mechanical stirring devices, ultrasonic equipment and compressed air stirring devices. Among them, mechanical stirring mainly uses shear force or impact force to disperse micro / nano particles, such as high-speed mixers, vibrating ball mills, etc. Although the bonded micro / nanoparticle aggregates can be broken up in the mechanical disperser, the force between the particles still exists, and they will reunite after being discharged from the disperser, and the mechanical stirring will cause the solution to splash and cause the loss of reactants; Ultrasonic equipment is a kind of high-intensity dispersion equipment. The suspension of micro / nano particles is directly placed in the ultrasonic tank, and the ultrasonic wave with appropriate frequency and power is used to disperse in an appropriate time. It mainly uses the cavitation of ultrasonic waves. Function, the formation and rupture process of microbubbles in the liquid medium, accompanied by the release of energy, produces shock waves, and violent collisions between liquid particles disperse the agglomerates. However, if the ultrasonic time lasts too long, it will cause overheating and accelerate agglomeration. At the bottom Precipitation is formed, and once the ultrasonic oscillation is stopped, the particles will reunite. In addition, due to the high energy consumption, high cost and high noise of ultrasonic equipment, the micro / nano particle suspension is directly dispersed in the ultrasonic tank, which is not suitable for mass production. Suspension; the compressed air stirring device uses the discharged purified compressed air to mix the micro / nano suspension evenly and break up the large aggregates, but it cannot disperse the small aggregates, the dispersion strength is low, the dispersion efficiency is low, and the compressed air When the flow rate is large, it will also cause the solution to splash and cause the loss of reactants

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