Drop layer

The profiles of the time-averaged wind velocity U(z), temperatures on dry T(z) and wet Tw(z) thermometers both inside the drop layer 0 < z < h and over it up to 10 m height were obtained in 12 measurement series. Some results typical for windy weather can be seen in Fig. 1.14. The relative humidity

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Gayev, Ye.A. (1993) Model of an Easily Penetrable Roughness in a form of Multy-Speed Drop Layer, Hydromechanicka, Kiev, 66. (in Russian). 

The altitude of a layer of the dynamic foam formed in dust-collecting plant at a certain relative difference of speeds of gas and liquid phases, decreases in process of growth of viscosity of a liquid [15] that calls decrease in efficiency of a dust separation, it is necessary to consider that the similar effect refers to also to a layer of an intensive barbotage and the drop layer partially strained in dust removal systems. 

On the basis of observations of work of an investigated deduster it is possible to assert that change of viscosity of an irrigated liquid influences conditions of a generating of an interphase surface and, especially, on intensity of formation of a drop layer. 

L—A liquid mass flow in a spray a 6-thickness of a drop layer. 

Also concentration of corpuscles in gas on an exit from a drop layer is... 

From the formula (7.23) follows, what even in case of a dispersoid uniform distribution in a gas stream on an entry in a spray of an irrigating liquid (c = const), concentration of an impurity in gas on an exit from a drop layer will be a variable on scrubber radius. This fact is caused, on the one hand, by expansion of a flat spray in process of removal from a source and, accordingly, water concentration decrease, and with another—falling of a radial velocity of drops of a liquid at the expense of force of an aerodynamic resistance (Mashayek, 1997 2003 and 2002). 

In the assumption that the gas stream moves through a drop layer in a regime of ideal replacement, and change of quantity of a solid phase in a gas stream is caused only by the inertia capture of corpuscles of a dust by drops of liquid, dependence for calculation of concentration of corpuscles in a gas stream on an exit from a layer is gained ... 

M j —tangential and radial making speeds of gas, tangential speed of drops both tangential and radial speeds of corpuscles in a drop layer, mps a v-thickness of a drop layer, m J -average diameter of drops, m of corpuscles, m a =2.8 (constant)—skilled values / =0.5 (constant) skilled values —efficiency of capture of corpuscles a single drop. 

The case of a joint action of the inertia capture of corpuscles and their centrifugal separation was modeled by drops through fictitious increase in a path of motion of a corpuscle in a twirled drop layer which was sized up by parameter... 

As one would expect, efficiency of process of the inertia separation does not depend on concentration of corpuscles in a gas phase on an entry in the apparatus. Independence of separation efficiency of gas of a thickness of a drop layer is less obvious. The given fact speaks that the quantity of a dispersoid trapped by a liquid, depends on number of drops in a layer and their surface, hence, is defined by the liquid chaige, a size of drops and speed of their motion. 

In actual practice a unequigranular drop layer and unequigranular composition of corpuscles in a gas stream fractional and fiiU of efficiency of a dust separation can be designed on a principle of addition of all factors influencing separation. 

A velocity profile Capture of particles Fractional efficiency Mathematical model Simulation criteria The drop layer The path of corpuscles... 

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