DE7111734U - Device for the continuous measurement of the weight of the particles flowing around, in particular for the measurement of drying cures - Google Patents

Description

Device for continuous measurement of the weight of the flow Particles, especially evaluation of drying curves.

The application “relates to a device for continuous measurement of the weight of the flowed particles and flow through round ends Fills, with fluid and parts standing in the substance, especially suitable for measuring drying curves.

The measurement of the weight of particles - even when they are present in bulk - that are located in a fluid flow, liquid or gas and which are in exchange of material with this, so that das.Gewicht the ^m eilchen depending on the time changes, is in general characterized in that the particles of time are taken to time from the fluid stream and weighed · the interruption of the mass transfer process caused in this hew köminlichen measuring method, esp. in rapid weight change or · therefore a measurement method It requires that continuously, without interruption, of the process to be measured is working.

With such measurements, e.g. those of drying curves (the particles lose weight) or that of adsorption processes (the particles v / ground heavier), in order to be able to carry out a continuous measurement of the weight, e.g. with the help of a scale, the dl « Weight measurement falsifying pressure loss of the particles (especially if they are present in the form of a bed) are eliminated »

This object is achieved according to the invention in that the pressure, which prevails in front of the particles flowing around it, is deflected in such a way that it is connected to a surface which is connected to the container (so-called tray) that contains the

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The force caused by lust and acting in the direction of the fluid flow is compensated by an equally large force acting in the opposite direction! will. This requirement fulfills the schema- * · '! device shown table. The fluid flowing upwards in this example is in material exchange with the parts in horde (d); the ^P art Ö), in which the tray is located, attached to a weighing device. The pressure loss - pressure P _{1 in} front of the shelf and p «near the shelf - creates a force acting upwards, ... in the direction of flow. Through bores in the stationary pipe , - <; (b \ through which the fluid flows, the surface GO is in connection with the space in front of the horde, i.e. in front of the particles. The static pressure that exists in front of the horde therefore also prevails in the space above the surface (k > which, as a result of the pressure difference Ap = Pi - Pp, creates a downward force against the direction of flow. To achieve this, the space above the surface ($ fluid

be tightly sealed, what fiction on a gas as a fluid according to takes place through the liquid seals e. Even the surfaces

(l) and Os) the pressure difference creates forces in the direction of flow. No force acts on the area η because, due to the equalizing CP bores ο, the pressure p ₂ prevails on both sides. By suitable choice of the geometrical relationships it is possible to compensate the forces acting on the horde 'ind the surfaces (l) and (ja) in the direction of flow by an equally large force acting in the opposite direction on the surface (k), so that the pressure loss determines the weight ., made for example by means of a registering scale, is no longer influenced.

An exemplary embodiment, here for the measurement of drying curves of beds at high drying temperatures, Fig.2 shows. Itas hoiisse, the gap coming from the fan passes a series of equal-

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richtersieben (a). The pressure measuring chamber (c) serves to measure the pressure loss. The grass then flows through the pipe (öa) and the bulk of particles in the rack (d) and emerges outside. The part (i), where the rack (d) sits, is attached to an electronic balance (X) ₃ which is relieved of the load by the beam balance fe), and which with the help of the step! (h) continuously records the drying curve (weight over time). The liquid seal (e) seal the space above the '.'. '. *: Area (k). They consist of fluid pockets that are firmly connected to the tube (b) and into which the annular webs of part I are immersed.

With the aid of the device shown, mass transfer processes can be carried out track of particles with a fluid without the exchange history must be interrupted for the purpose of the measurement. Of the The line drawn down by means of the recorder also enables a quick overview and provides a finished drying curve

Claims (1)

Claim: - Apparatus sur continuous measurement of Gev / ichtes umströmter particles ^ especially _e for measurement of drying curves (the particles associated with an excess or fluid flowing through in Stoffaustauch) without interrupting the exchange operation, characterized in that the one with the bulk of the material filled portion with of circular surfaces and ring-shaped walls, which hangs freely on a weighing device and is designed in such a way that it forms the lower surface of a space (viewed in the direction of flow of the fluid), which with the space in front of the part filled with material in Connection is and opposite the outer space »in which the same pressure prevails as after the particles flowed over or through, closed by an annular wall and a seal - especially a liquid seal, consisting of an annular wall that is immersed in a liquid-filled pocket is, while the upper horizontal side surface of this space of a fixed Part is formed, this being connected to the part hanging freely on the weighing device in such a way that the space is sealed fluid-tight from a <? M outside space, which is achieved by seals, especially liquid seals, with the surfaces of the space thus sealed off , in which the same pressure prevails as in the space in front of the part filled with good, are dimensioned in such a way that the effect of the pressure loss across the particles on the weighing is eliminated.