RU1794826C - Method of pneumatic feeding powder material from reservoir - Google Patents

Abstract

Usage: pneumatic supply of powdered materials from a tank. Summary of the invention: an upward stream of compressed gas is applied to the material in the tank, and the gas-material suspension formed above the material layer is twisted and discharged under the influence of a pressure differential. The method allows separately controlling the fractional composition and the amount of material supplied from the tank. 1 ill.

Description

The invention relates to systems for pneumatic feeding of powdered materials and is intended to supply powdered materials to various technological installations.

A known method for supplying powdered materials is to load it in a sealed enclosure in a layer, to supply conveying gas to the enclosure, to create intense vortex flows over the layer of powdered material, to fluidize it, to select the resulting gas mixture and to transport it to the consumer. However, intense vortex flows are created above the layer of powdery material under the influence of high-speed jets of air flowing out of the nozzles tangentially located on the manifold. This leads to the fact that the flow rate of the powdered material is uniquely determined by the flow rate of air supplied through the nozzle of the collector, that is, with an increase in flow rate

air consumption of the powder material also increases. This circumstance makes it possible to efficiently control the flow rate ratio of components, which is extremely important when creating power systems for various engines. At low air flow rates, the intensity of the vortex flows is very insignificant and, therefore, the flow rate of the powder material may be completely absent. In addition, when implementing this method, an effective volumetric fluidization of the powdered material is impossible, as a result of which, when it is supplied in a known manner, low flow rate stability of the powdered material is observed.

An object of the present invention is to expand the range of control of the flow rate of powder material.

The goal is achieved in that in the method of supplying powdered materials, which consists in loading it elofe

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into a sealed enclosure, supplying a carrier gas to the enclosure, creating intense vortex flows over a layer of powdery material, fluidizing it, taking out the resulting gas mixture and transporting it to the consumer, the conveying gas is fed in an upward stream through a layer of powdery material.

The proposed method is based on the following. The carrier gas is supplied by an upward stream through a layer of powdery material, and as the carrier gas moves in an area of vortex flows, upward flows are formed, which leads to gravitational separation of the particles of the powdery material. And to the selection of particles of only a certain size. Of particular note is the fact of functional separation of the formation of vortex flows by adding powdered material and the process of supplying transporting gas to the region above the layer. That is why the flow rate of the gas-material mixture can be regulated, secondly, by the flow rate to the conveyor; more about gas, and, secondly, the intensity. ,, ihr. flow over a layer of powdery material. It should be noted that the pat path of the gas, the terial mixture when supplied by the proposed method is determined by the concentration of particles of the powder material in the zone of vortex flows and can vary in the range of ... kg / s.

The drawing shows the proposed

a method for supplying powder material, implemented in a device that contains a sealed housing 1, in which there is a powder material 2, a pipe 3 for supplying a transport gas, a pipe 4 for removing a gas mixture, a vortex flow generator 5 and a generator drive 6. As a generator drive, electric or pneumatic drives can be used.

The device operates as follows.

The powdered material 2 is poured into the housing 1 and the drive 6 of the generator 5 is turned on. Under the influence of intense

vortex flows over a layer of powdery material a gas-material mixture of particles is formed. When conveying gas is supplied through the pipe 3 in the zone of vortex flows, ascending

flows, which allows the selection from the pipe 4 of the gas mixture.

Thus, the proposed method for supplying powdered material allows expanding the range of control of the flow rate of the powdered material.

Claims (1)

SUMMARY OF THE INVENTION A method for pneumatically supplying powder material from a tank, in which no material in the tank is exposed to compressed gas to form a gas suspension over the material layer, twist the gas-measuring suspension formed above the material layer in the tank and discharge it from the upper part of the tank under the influence of a pressure drop, with the inclusion of the fact that, in order to expand technological capabilities by providing separate control of the fractional composition and amount of supplied material, compressed gas is supplied to the lower part of the tank to act on the material under a layer of material with an upward stream.