Device for incorporation of pulverulent materials, especially dust-explosive pulverulent materials, into a liquid, especially an inflammable liquid
View Patent ↗The invention relates to a device for incorporation of dust-explosive pulverulent materials into readily inflammable liquids, wherein the device includes the following: at least one liquid circuit ( 10 ), wherein the liquid circuit comprises at least one liquid vessel ( 11 ), a pipeline system ( 12 ), and at least one pump ( 13 ), and wherein the liquid circuit is designed to accommodate a combustible liquid; at least one powder vessel ( 30 ) designed to accommodate at least one pulverulent material ( 31 ) to be incorporated into the liquid, and wherein the powder vessel is connected to the liquid circuit, especially to the pipeline system, in a fluid-conducting manner via a powder feed conduit ( 32 ).
1 . A method for the incorporation of dust-explosive pulverulent materials into a readily inflammable liquid, wherein the method comprises the following steps:
circulating a liquid in a liquid circuit by means of a pump such that a purely fluid aggregate state of the liquid is present, wherein the liquid is a combustible liquid at a temperature of 40° C. to 60° C. having an ATEX classification according to guideline 2014/34/EU, wherein the liquid has a viscosity of 500 mPas-3000 mPas at 50° C.;
suctioning a pulverulent material by means of a gas flow, due to a negative pressure of the pump, out of a powder vessel via a powder feed conduit;
introduction of the pulverulent material into the liquid in the liquid circuit in a controlled manner via a powder feed conduit;
mixing the liquid and the pulverulent material in the liquid circuit.
2 . The method of 1 , wherein the pulverulent material, before being suctioned, is fluidized by feeding in an inert gas.
3 . The method of claim 1 , wherein the mixing of the liquid and the pulverulent material in the liquid circuit is actively carried out by a homogenizer, and wherein a mixture is produced by the mixing.
4 . The method of claim 3 , wherein the proportion of introduced pulverulent material in the mixture is 0.1-1.5% by weight, and/or 5-45% by volume.
5 . The method of claim 1 , wherein introducing the pulverulent material into the liquid in the liquid circuit in a controlled manner takes place via a continuously regulable control valve,
wherein the control valve, via a computing unit, regulates a powder flow and/or a change in powder flow based
on a programmed function and/or
on a pressure difference of a pressure at the pump inlet side and a pressure at the pump outlet side
such that a proportion of pulverulent material to be incorporated can be optimized.
6 . The method of claim 1 , wherein the pulverulent material comprises closed-pore hollow spheres made of plastic, wherein the hollow spheres preferably have a particle size of 20 μm-140 μm.