KR100676503B1 - A inclination-type paddle dryer for drying adhesive sludge phase matter - Google Patents

Abstract

The present invention relates to a paddle dryer that is widely applied to a drying apparatus such as a viscous sludge material, and comprises a wedge-shaped paddle on a two-axis, which is axially installed inside a conventional paddle dryer, with a paddle of a horizontal disc shape. It is installed at an angle to be inclined at a certain angle to prevent cohesive dryness from cohesion due to self-adhesion in the drying process and prevents the phenomenon of revolving with the paddle surface without heat transfer, and greatly improves the drying efficiency by overcoming the problem of transportation and drying. It is to provide a paddle dryer that has a cost reduction by replacing the entire wear by installing a wear-resistant horseshoe, a prefabricated transfer wing, and a crushing stator-bar.

That is, according to the present invention, a plurality of inclined paddles 3 assembled at an end having a prefabricated transfer wing 6 are fixed to a shaft 4 in the casing 2 constituting the paddle dryer 1, and the casing 2 is fixed. To prevent the phenomenon of cohesion of the viscous dry matter to be introduced from the top, the transfer blade (6) having a predetermined angle assembled to the paddle (3), and the wear-proof arc-shaped horseshoe (8) fixed to the outer surface of the paddle (3) and It is characterized in that it comprises a shredding stator bar (5) which is fixed to the upper side of the casing (2).

The inclined paddle (3) for the paddle dryer (1) of the present invention not only prevents the sticky dry matter from coagulating in the dry process and cannot be transported between the paddle (3) surfaces and the casing (2). In addition to the internal shredding device and the transfer blade (6), the crushing of the dry material gradually increases during the drying process to increase the specific surface area of the dry material, thereby increasing the drying efficiency, and to prevent wear of the arc-shaped horseshoe (8) on the outer surface of the paddle (3). By attaching and extending the replacement cycle according to the wear of the paddle (3) it is possible to significantly improve problems such as cost increase due to wear replacement.

Paddle dryer, paddles, feed vanes, shredder stators-bars, wear-resistant horseshoe

Description

A inclination-type paddle dryer for drying adhesive sludge phase matter}

1 is a cross-sectional view showing a conventional paddle dryer

Figure 2 is an exploded perspective view of the paddle of the conventional paddle dryer

3 is a cross-sectional view of the inclined paddle dryer provided in the present invention.

Figure 4 is a side cross-sectional view of the inclined paddle dryer provided in the present invention.

5 is a perspective view of the paddle in the inclined paddle dryer provided by the present invention

Figure 6 is an exploded perspective view of the paddle of the inclined paddle dryer provided in the present invention

Figure 7 is an excerpt perspective view of the combined paddle components of the inclined paddle dryer provided by the present invention

■ Explanation of symbols used in main part of drawing ■

1: paddle dryer 2: casing

3: paddle 4: shaft

5: Fragment stator bar 6: Feed blade

6a: mounting hole 7: fixing bracket

7a: hole 7b: bolt

7c: nut 8: horseshoe

8a: joining hole

The present invention relates to a paddle dryer that is widely applied to drying of viscous sludge material (sewage / wastewater sludge, chemical sludge), and more particularly, is divided into symmetrical wedges on the inner two axes of the conventional paddle dryer. Install the paddles with inclined angle and install the prefabricated transfer blade which can be replaced at the end of the paddle to increase the heat transfer specific surface area of the building by self-cleaning effect by the rotation of the shaft to improve the drying efficiency and the inclined prefabricated transfer It is an object of the present invention to provide an inclined paddle dryer which greatly improves the problems of the cost increase due to the transfer of the adhesive material by the wing and the replacement of the entire wear.

In general, the drying efficiency is the ratio of the amount of heat actually supplied to the amount of heat required for drying. In the same heat transfer area of the indirect heat conduction paddle dryer, the smaller the particles of the dry matter, the higher the specific surface area in contact with the heat transfer surface, and thus the heat transfer effect is high. Moisture is characterized by a faster drying speed as it exists as surface or free water.

Disc dryers, paddle dryers, drum dryers, and thin film evaporation dryers are typical examples of indirect heat conduction drying dryers. Among them, disk dryers and paddle dryers are used for fish meal, feed, chemicals, and precision. It is widely used in chemical drying processes, and recently, it has been introduced and used in various sludge-like drying processes.

Dryer to which the present invention belongs in the dryer type indirect heat conduction type dryer, agitating and transporting the adhesive sludge to increase the specific surface area in contact with the heat transfer surface to increase the drying efficiency, and extend the life of the device as well as the cost of replacement for wear damage Paddle dryer can be saved.

Paddle dryer has been applied to various fields from small capacity to large capacity by using conduction heat between heat medium and dried material with heat transfer surface in between.

The structure of a paddle dryer, which is an indirect thermal conductivity type drying apparatus that is generally used now, is shown in FIGS. 1 and 2.

Conventional paddle dryer has two shafts (4) axially installed in the body of the paddle dryer (1) as shown in Figure 1, the wedge-shaped paddles are fixed at equal intervals in the symmetrical state on the shaft (4) (3) Drying is carried out by the heat transfer action while the dry matter is agitated in contact, and is a system that is forcibly pushed and transported according to the amount of dry matter to be added.

The decisive problem in the conventional paddle drying apparatus as described above is that agitation due to sticking and entanglement of lumps between the paddles (3) and the surface when drying the moisture-adhesive high-adhesive sludge material. It is not smooth and the drying efficiency is lowered, and the conveyance capacity is lowered because the transport stir blade is mounted at the rear of the paddle in the direction of rotation. In order to overcome this, the angle of the main body is given a low gradient in the direction of the outlet, but there is still a limit to the flow required to transfer the cohesive sludge.

In the paddle dryer, wear starts from the outer surface of the paddle (3) and the transfer blade (6), which are most in contact with the object to be dried. Conventionally, when the paddle (3) surface is damaged by wear, the entire paddle (3) surface needs to be replaced. It has

Therefore, the present invention is to provide a paddle dryer of a new configuration that can eliminate all the problems of the existing paddle dryer as described above,

The present invention, in the paddle dryer, to minimize the damage caused by the wear of the outer surface of the rotating paddle tip to the minimum, even if the dry material itself is a material having a high adhesion, it can be transported smoothly without recurring phenomenon, and maximize the drying efficiency In order to provide a paddle dryer that can

Mounting the paddle at a certain angle to the axis to prevent the adhesive dry material is not tangled between the paddle face and the plane according to the self-adhesion, and not transported, by attaching a horseshoe to the outer peripheral edge of the paddle The present invention provides a paddle dryer that minimizes damage and provides a structure in which a transfer wing is prefabricated so that only a part of the structure can be replaced when worn, so that dry items having self-adhesiveness can be gradually transferred to enable efficient and uniform drying. The present invention has been completed with technical problems.

Hereinafter, the present invention will be described in detail with the accompanying drawings. However, in describing the present invention, the same components as those of the conventional paddle dryer will be described using the same reference numerals.

The present invention relates to a paddle dryer (1) of the indirect thermal conductivity method, the wedge paddle of the conventional conductive heating paddle dryer (1) which is mounted in two divided symmetry on the vertical line of the axis (4) in the drying method ( 3) is made up of divided parallel disc shaped paddles 3, and the disc shaped paddles 3 are arranged on the axis 4 so as to be symmetrical at a specific angle.

Then, the prefabricated feed vane 6 is attached to the end of the paddle 3 in the conveying direction to prevent the dry matter from revolving into the mass due to the attachment of the sticky sludge in the drying process. In order to prevent the problem and also to stir and crush the sticky dry matter mass which is gradually transferred to the outlet by the rotation of the paddle shaft 4 during the drying process, the effective surface area of the dry matter to the paddle 3 heat transfer surface It is configured to increase the drying efficiency by fixing the replaceable horseshoe (8) on the outer surface of the paddle (3) of the paddle dryer (1) to prevent damage to the entire surface of the paddle (3) due to wear during use Paddle dryer (1) is configured so that only a part can be replaced.

The dry sludge-like dry matter flowing into the upper center portion of the paddle dryer 1 is dried by conduction heat transferred to the outer surface of the plurality of inclined paddles 3 fixed at regular intervals on the paddle shaft 4. When the paddle shaft 4 rotates, the feed direction of the shaft 4 is gradually transferred by the inclined feed vane 6 attached to the tip of the paddle 3.

The transfer blade 6 may provide a paddle dryer 1 having an optimal drying efficiency required by the process by assembling and using a different angle of the transfer blade 6 according to the viscosity and the throughput of the dry matter. Make sure

The disk-shaped paddle 3 of the present invention, which is installed on this paddle shaft 4, is mounted inclined in a pair of 180 ° symmetrical shapes on the same vertical line with respect to the paddle shaft 4, and these pair of paddles 3 Is alternately mounted at an angle of 180 ° with respect to the entire paddle shaft 4 to have a structure in which some flow paths such as a screw conveyor are opened during rotation.

The paddle shaft 4 to which these inclined disc shaped paddles 3 are attached consists of two sets, and the two paddle shafts 4 are spaced between the paddle 3 and the paddle 3 which are fixedly installed next to each other. To cross between them so as to rotate in the opposite direction during rotation, the mass of the sticky mass of the dry matter is gradually crushed while gradually stirring and flowing by the inclined disc-shaped paddle (3) that performs the screw movement surface of the paddle (3) It can be efficiently contacted with and heat-transferred to obtain a dry matter having a uniform water content.

The horseshoe (8) fixed to the outer periphery of the paddle (3) protects the outer surface of the paddle (3), which is the most abrasion part due to contact with the object, so that the paddle (3) disc itself is worn and the paddle shaft (4) Complementing the problem of replacing the whole and can only extend the life of the paddle dryer (1) by replacing the horseshoe (8) when worn.

In addition, the stator bars 5 installed on both upper sides of the paddle dryer 1 and the casing 2 are fixed to the casing 2, and the adhesive dry matter is attached to the casing 2 by the rotation of the paddle shaft 4. 2) It grows to the top of the wall to prevent the phenomenon of flowing without paddle (3) and heat conduction, and to break up the large mass of dry matter to discharge the heated moisture inside the dry matter to the top to improve the drying speed Will be.

Such a paddle dryer 1 consisting of an inclined paddle 3 and an anti-wear horseshoe 8 of the present invention is shown in detail in FIGS. 3 to 7.

In other words, in the inclined paddle dryer 1, the paddle shaft 4 prevents repulsion caused by self-adhesion of the sticky to-be-adhered body, and combines a parallel disk-shaped paddle 3 with a smooth stirring and flow.

The divided parallel disc-shaped paddles 3 are welded so as to be symmetrical on the same line cross-section of the paddle shaft 4 in a fan shape, and the next paddles 3 which are installed in series are 180 in front of the paddles 3 and 180. Install in a position.

At the tip of the paddle 3, a fixing bracket 7 having a coupling hole 7a is fixed and attached to the bolt 7b and a nut 7c through a coupling hole 6a formed in the transfer blade 6. 6) to be assembled separately replaceable in the paddle (3).

The transfer blades 6 can be assembled and used with different angles of the transfer blades 6 depending on the viscosity and throughput of the hydrous sludge to provide the optimum paddle dryer 1 required by the process.

And the horseshoe 8 for abrasion prevention of the paddle 3 is configured in an arc shape in accordance with the outer periphery of the paddle (3), forming a coupling hole (8a) at both ends and the center to fusion with the paddle (3) Weld fixation.

Inside the paddle dryer (1) during the drying process, the sticky dry material grows along the wall of the casing (2) according to its self-adhesion and copes and prevents the phenomenon of heat transfer with the paddle (3) surface. (5) is installed.

The water-sludge-like high-density dry matter is introduced into the interior through the upper part of the paddle dryer 1 and dried by contact heat transfer with the surface of the paddle 3 heated by a heat medium (steam, hot water, fruit oil).

These dry matters have a strong viscous section while contacting the paddle (3) surface heated in the drying process and aggregates in a block according to its own adhesiveness and shows a phenomenon that it does not revolve between the paddle (3) surface and is not transported. The inclined paddle (3) of this block the hollow phenomenon to allow the dried material to stir and flow, and to perform sufficient heat exchange with the face of the paddle (3), and to adjust the feed rate in accordance with the rotational speed of the shaft (4) It is possible.

In addition, when the dry material is a wearable material, the paddle (3) surface is damaged. The maximum damage to the wear is the outer surface of the paddle (3) with the greatest contact with the dry material and the rotational speed is high. Although a problem arises in that the paddle 3 and the entire paddle shaft 4 need to be replaced for damage, the warp paddle 3 of the present invention has an economic material suitable for the wear characteristics of the sludge with the horseshoe 8 at the outer peripheral end. To prevent the damage caused by abrasion of the paddle (3) surface by selecting a combination, only the horseshoe (8) can be disassembled and replaced when worn.

As described in detail above, the inclined paddle dryer 1 provided in the present invention attaches the paddle 3 to the shaft 4 in an inclined manner and attaches the prefabricated transfer wing 6 so that the adhesive material has a bulky paddle 3. It prevents the phenomenon of revolving without being transported between the planes and gradually crushes, stirs, and flows, so that sufficient thermal conductivity with the paddles (3) surface is possible, and the residence time is easily adjusted according to the rotational speed of the paddle shaft (4). The drying efficiency can be increased, and at the same time, a replaceable horseshoe (8) can be attached to the outer peripheral end of the paddle (3) to provide compatibility for replacement and replacement of abrasion damage and to provide cost reduction effects. To provide an advantage.

Claims (1)

Paddle dryer (1) A conventional paddle dryer having two shafts (4) in which a paddle (3) is axially fixed at predetermined intervals on a shaft (4) which is driven by a drive gear in a casing (2). In 1); A paddle 3 mounted inclined in a pair of 180 ° symmetrical shapes on the same vertical line with respect to the paddle axis 4, A feed vane 6 assembled and fixed to the front end surface of the paddle 3 and having a predetermined angle; An arc-shaped horseshoe (8) fixed to an outer surface end of the paddle (3), Adhesive sludge-like material drying inclined paddle dryer, characterized in that it comprises a shredder stator bar (5) fixed to the upper side of the casing (2).

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