SU1493850A1 - Device for pre-drying materials - Google Patents

Abstract

The invention allows to intensify heat and mass transfer. In front of the drying chamber 2 there is a pipe / P / 1 supplying heat carrier / TH / with flow guides 5 arranged parallel to each other with the formation of intermediate gaps 8. The guides 5 are made in the form of conical shells, facing large bases oppositely to the flow and sequentially placed axially P 1 with mutually eccentric displacement and location of the conditional centers of the shells along a curvilinear trajectory. The gaps 8 are formed between the bases of the shells and are made decreasing from the gap to the gap along the flow. The loading chute 9 is introduced into the upper part of П 1 after the first along the flow of the shell 6, the larger base is equipped with gas distribution grill 7. The device allows to increase the contact time of the material to be dried with high temperature TH and to turbulent the flow of TH in the zone of contact with the material being dried. 1 il.

Description

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The invention relates to a device for drying bulk materials and can be used in any industry or other industries.

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

The drawing shows the scheme of the proposed device for preliminary drying.

The device contains a heat transfer inlet pipe 1, installed in front of the drying chamber 2, inlet 3, outlet 4, flow guides 5 in (5 lnny in the form of conical shells, first shell 6, gas distribution grid 7, gaps 8 between the bases of the sheath , loading chute 9 window 10 for unloading dried material into the drying chamber 2.

The pre-drying device operates as follows.

The heat carrier is fed through the heat supply inlet pipe 1, and then using the first shell 6, the larger base of which is provided with a gas distributing grid 7 of high resistance, direct its main part to the annular space formed by the walls of the pipe 1 and guides 5, conical shells, from where, through the gaps 8 between the bases of the shells, the coolant enters the inner space of the shells, and then is directed into the chamber 2 from the sawing chamber. The material being dried is fed to the device the loading chute 9 introduced into the upper part of the nozzle 1 after the first shell 6, the larger base of which is provided with the gas distribution grid 7, moving down under the force of gravity from the loading chute 9, the particles of the material being dried are braked by the heat carrier flow coming from the bottom of the gap 8, formed by the first shell 6 and the second shell, and receive an impulse of movement directed upwards in the direction of the Particles of the material being dried under

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By the operation of the heat carrier fluids, they make a creeping motion to the outlet 4 of the nozzle 1 of the SN due to the fact that the constrictions are placed axially of the nozzle 1 with B3ai-iMHo with eccentric displacement and arrangement of the conventional centers of these shells along a curvilinear trajectory, and also due to the fact that between the bases. The gap gaps 8, the magnitude of which is t-1, causes disruption in the direction of travel, and the coolant.

The ycTpoficTBO transducer allows to increase the contact time of the material being dried with the high temperature TcnnoHocHTfLieM at high temperature, as well as to sweep the flow of heat transfer medium in the contact zone with the height of 11M material. The invention has a significant intensity of heat. yumlsssoobmena.

Formula of Invention

The device for the pre-drying of materials, containing the installed 1 in front of the suupi chambered chamber, of the coolant bottom with inlet and outlet openings, is provided with a flow direction parallel to the formation of gap gaps, and a loading point, and that, in order to intensify heat and mass transfer, the flow guides were shaped as conical shells, obstructed by large bases opposite the flow, successively placed axially with a pipe with a vpzg-sho eccentric By the displacement and location of the reference centers, these are: -: shells along a curved path, and TioMHHyTi ie intermediate gaps are formed between the bases of the shells and made decreasing from the gap to the clearance downstream, the first along the flow of the shell, the larger base of which is equipped with gas distribution grill.

Claims (1)

Claim A device for preliminary drying of materials, comprising a coolant supply pipe installed in front of the drying chamber with inlet and outlet openings, equipped with flow guides arranged parallel to each other with the formation of intermediate gaps, and a loading point, which, in order to intensify heat and mass transfer , the flow guides are made in the form of conical shells facing with large bases facing the flow, sequentially placed axially with a pipe with mutually eccentric displacement and arrangement of the conditional centers of these shells along a curved path, and the said intermediate gaps are formed between the base of the shells and are made decreasing from the gap to the gap along the flow, and the charging heat is introduced into the upper part of the coolant supply pipe after the first along the flow of the shell, the larger base of which equipped with a gas distribution grill.