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Method and device for generating droplets over a variable spectrum of particle sizes

A technology of liquid droplets and equipment, applied in the direction of metal processing equipment, vibrating device granulation, chemical instruments and methods, etc., can solve problems such as liquid loss

Active Publication Date: 2013-08-14
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generators of this type lead to unfavorable liquid losses if they are not used under specific conditions such as those developed for them (very hot media such as flames or plasma cones)
Furthermore, the ejection velocity of the droplets is of the same order as the impingement velocity of the liquid jet, again failing to achieve the above objectives / meet the above constraints
[0027] Therefore, none of the techniques known in the prior art for the generation of droplets allows to meet all the following criteria:

Method used

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  • Method and device for generating droplets over a variable spectrum of particle sizes
  • Method and device for generating droplets over a variable spectrum of particle sizes
  • Method and device for generating droplets over a variable spectrum of particle sizes

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Embodiment Construction

[0088] pass Figure 5 The figure in shows schematically the method of the present invention, Figure 5 All main constituent steps of the method are shown comprehensively, as well as some optional or alternative steps of the method:

[0089] - in the optional initial step Et of the method of the invention 0 , pulverize the liquid to obtain a set of primary droplets G ou1 ;

[0090] - According to a variant of the invention, the so-called charging operation E t1The step complements the initial step, the charging operation E t1 The purpose of is to keep the primary droplets isolated from each other;

[0091] - In general, in the first step Et 1 , from a liquid Liq that appears in the form of a continuous jet, or from a primary droplet G ou1 Each of produces a liquid film via collision with a support;

[0092] - Next, in step Et 2 The membrane is subjected to vibration and appropriate temperature to pulverize the membrane to obtain a set of primary droplets G of calibrate...

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Abstract

The invention relates to a method for generating droplets over a variable spectrum of particle sizes, characterized in that it comprises the following steps: impacting a liquid stream onto a substrate at a given relative impact speed; vibrating said substrate at at least one vibration frequency; heating said substrate to a so-called impact temperature such that the liquid film formed by the impact and vibrated is heated to a so-called main temperature so as to form, in a combined manner, so-called main droplets from said film; transporting said droplets via a transfer / braking / sorting system toward a liquid for precipitating the main droplets, said transport being accomplished at a so-called transport temperature, wherein the set of the relative impact speed, vibrating frequency, main temperature, and transport temperature parameters enabling the modulation of the particle size of said formed main droplets, as well as the modulation of the speed thereof. The invention also relates to a device for implementing the method of the invention.

Description

technical field [0001] The field of the invention is a method and an apparatus for the generation of droplets, notably in the application of synthesizing small spheres (or spheres) of nuclear fuel material. Background technique [0002] This type of method / apparatus may generally be included in more general methods for the manufacture of nuclear fuel using sol-gel techniques (ie, techniques using precipitation reactions). This type of approach may limit the dispersion of potentially radioactive / contaminant material in the process of producing small spheroids / spheres of fuel material, these spheres of controlled size and shape are themselves subsequently (potentially) included in a process that may utilize deposition techniques In potentially manufactured fuel elements (e.g. TRISO / VHTR type fuels), the abbreviation VHTR in expressions such as "VHTR cycle" stands for "very high temperature reactor" and the abbreviation TRISO in the expression "TRISO fuel" stands for three Iso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05B1/26B05B1/36B05B17/06B22F9/02B22F9/08C01G43/025B01J2/02B05B7/00B05B15/02B05B15/12G21C3/62B01J19/10B22F1/148
CPCB01J2/18B05B1/26B22F9/026B01J2/02B22F1/0096Y02E30/38B05B15/12G21C3/623B05B1/262B01J19/10B22F9/082C01G43/01B05B15/02G21C3/62B01J2/04C01G43/025B05B17/0623B05B7/00B05B1/36B05B17/0607B05B17/06C01G43/00B05B1/267Y02E30/30B22F1/148B05B17/0676
Inventor M·布罗捷D·穆利尼耶
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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