SU1255832A1 - Apparatus for heat treatment of pulverulent materials - Google Patents

Description

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The invention relates to heat and mass transfer apparatus and can be used in chemical and adjacent industries for processing powdered materials.

The purpose of the invention is to intensify the process of heat and mass transfer.

Figure 1 shows schematically the device, a general view; figure 2 - section A-A in figure 1; on fig.Z section bb in figi.i.

The device contains a vertical chamber i with a dryer 2 coaxially installed in it with an annular gap with a loading estrus 3, propagated along the axis of the dryer 2, and a cochlea 4 in the upper part located in an annular gap with a screw insert 5, in the form of alternating spiral channels 6 and 7, one of which (channel 6) with electric heaters 8 placed inside it is connected at the inlet to the tangential pipe 9 of the coolant inlet, at the outlet - to the dryer 2, and the other (channel 7), at the inlet connected to the cochlea 4 and at the outlet - to the nozzle 10 material output, equipped with vertical rods P. At the bottom of the dryer 2 there is a swirl 12.

The device works in the following way.

The initial wet material is fed through the chute 3 into the lower part.

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the dryer 2, where it is picked up and transported to the upper zone of the dryer 2 swirled with the help of a vortex blade 2 by the flow of the coolant. In the dryer 2, heat and intensive removal of surface moisture are carried out. Passing the dryer from the bottom up, the dried powdery material through the cochlea 4 enters the spiral channel 7. Here, due to the interaction of the material particles with the surface of the vertical rods, their convective and contact heating and periodic braking of the material particles occur, resulting in relative speeds and time the stays of the particles increase, and the intensity of the process increases.

The finished product in the pneumatic conveying mode is discharged from channel 7 through pipe 10. Fresh coolant through pipe 9 is fed into another spiral channel 6, where it is heated to the required temperature and then enters the lower part of the dryer 2.

Placing the electric heaters 8 directly in the spiral channel 6 provides the ability to control and maintain the required temperature conditions necessary to obtain the finished product with desired properties.

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Editor N. Bobkova

Compiled by V. Burov

Tehred I. Veres Proofreader I. Muska

Order 4808 / 39Tirals 634, Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Claims (1)

DEVICE FOR THERMAL PROCESSING OF POWDERED MATERIALS, containing a chamber and a coiler coaxially mounted in it with an annular gap with a feed chute on the axis and a cochlea in the upper part, a tangential coolant inlet pipe and a material outlet pipe, characterized in that, for the purpose of intensification of the process a helical insert is installed in the annular gap, forming alternating spiral channels, one of which is connected at the inlet to the tangential coolant inlet pipe and at the outlet to the drier STUDIO and is provided with electric heaters, another channel inlet connected to the cochlea, and the output - to the pipe material and is provided with output tikalnymi rods, wherein a set vihritel podsushivatelya Considerations. Βέρο re se>