SU370967A1 - THE APPARATUS FOR CARRYING OUT HEAT AND MASS-EXCHANGE PROCESSES BETWEEN GAS AND BULK MATERIAL - Google Patents

Description

one

The invention relates to heat and mass transfer devices for carrying out processes between a gas and a bulk material, namely, devices for drying bulk materials, adsorption processes, etc.

The water dryer is known, having a preliminary drying chamber, a mixing device, a perforated bottom (mesh).

A known apparatus for drying bulk materials with hot gases, comprising a cylindrical body, a spiral shell placed along its axis, the turns of which form a channel for moving the material being processed, a loading and unloading device. However, this apparatus is suitable only for well-flowing, particulate materials and does not provide intensive heat exchange of bulk materials of a lower degree of dispersion.

In order to intensify the process in the proposed apparatus, the spiral shell is mounted on a horizontal drive shaft, and the loading device is made in the form of curved bands attached to the inner surface of the central turn of the shell.

Such an implementation greatly simplifies its design, allows to expand the range of the material being processed by particle size, provides sufficient washing of all

loose particles by gas and creates conditions for efficient heat exchange due to repeated contact with the heated surface.

The proposed method is illustrated in FIG. 1 and 2.

FIG. 1 shows the apparatus, a longitudinal section; in fig. 2 - the same cross section.

The apparatus contains a cylindrical body

/ with pipes 2 for material exit and 3

gas inlet (outlet). In the case / on the floor

drive shaft 4 mounted spiral

shell 5, provided with end walls

6. To the inner surface of the central

curved shells attached curved polos s 7, forming a boot device.

The spiral channel 8 is made with a cross section along the gas and material flow, which contributes to optimal process conditions.

At the bottom of the spiral channel are nozzles 9.

The device works as follows. The bulk material to be processed is conveyed by the transporting device inside the hollow shaft 4 and, by means of strips 7, is evenly distributed across the width of the spiral channel.

When the shell rotates against the spiral winding, the material is poured along the bottom of the channel 8, captured by asadok 9, rises to a certain height, again poured to the bottom of the channel and moves from the central turns to the outer, and then goes through the nozzle 2 out of the apparatus.

When the gas flows, the gas is fed through the hollow shaft 4, into the spiral channel, propels the material flowing from the nozzles, washes its upper jumbo, falling over the bottom of the channel, - and the entire spiral channel goes through pipe 3. When using the device as a drying unit the gas heats the inner and outer surfaces of the channel bottom and thereby heats the lower layers of the material.

Subject invention

Apparatus for conducting heat and mass transfer processes between the gas and the bulk material, comprising a cylindrical body, a spiral shell placed along its axis, between the turns of which a material transfer channel is formed, a loading and unloading device,

that, in order to intensify the process, the shell is mounted on a horizontal drive shaft, and the boot device is made in the form of: curved strips attached to the inner surface of the central turn

shells.

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