KR20120061020A - Indirectly haeting of Drum dryer for organism, plastic, sludge - Google Patents

Abstract

PURPOSE: A drum drying furnace for indirectly heating vegetable materials, resin, and sludge is provided to properly change a drying capacity according to needs by constituting a drum in multiple stages. CONSTITUTION: A drum drying furnace(10) for indirectly heating vegetable materials, resin, and sludge comprises a drum(100), a stirring shaft(200), a plurality of stirring shovels(300), a heat medium pipe(400), and a fume discharging pipe(500). The drum comprises both circular sections(110), a lateral side(120), an inlet port(130), and an outlet port(140). The lateral side connects the both circular sections. The inlet and outlet ports for materials are respectively formed in the front and rear ends of the lateral side. The stirring shaft is arranged along a longitudinal center axis of the drum. The stirring shaft is rotated by a motor and mounted in the both sections of the drum. A plurality of through-holes(220) is formed in a surface of the stirring shaft. The plurality of the stirring shovels is fixed to the surface of the stirring shaft along a radius direction of the stirring axis. The heat medium pipe covers the lateral side of the drum and heated heat medium flows along the heat medium pipe. The fume discharge pipe is extended from the stirring shaft to outside.

Description

Indirectly haeting of Drum dryer for organism, plastic, sludge}

The present invention is an indirect heating drying method. Previous drying methods did not achieve the purpose of water content up to 10% because direct flame did not directly touch the dry material and burned or did not become homogeneous. In this technology, the drum is piped to the outside of the drum drying furnace to produce low temperature liquid at high temperature and supply it through the piping pipe with the supply pump.The high temperature heating medium transfers heat to the drum to the inside of the drum and the desired constant temperature inside the drying furnace. It evaporates rapidly because it keeps. The waste heat heat medium recovered by circulation is continuously supplied by heating about 30% through a boiler. Energy is saved by about 70%, it can achieve the purpose of drying the material and achieve high quality drying. It relates to a rotary drying furnace invented to be able to dry plant material, resin (plastic) and sludge from fire ignition safely, to save energy by waste heat recovery, to improve the quality of drying and to shorten the drying time.

Energy consumption and long time are currently used to dry the building, it does not reach the purpose of the drying rate, and it is unstable in combustion due to the high water content of the drying material. In order to achieve the purpose of the drying rate, the conventional direct heating method is a low carbon energy indirect heating method.

Conventional drying methods are fired and dried. Since the amount of energy is high and the object to be dried is easily ignited and treated at low temperature, it is very low in drying for long time and homogeneous quality.

Indirect heating method uses heat of drying as heat medium to achieve low carbon energy use, high efficiency drying, short time and homogeneous drying quality. Arrange the piping outside the drum dryer

Boiler generates heat medium at high temperature and circulates in the pipe. The cold waste heat medium returned to the circulation is generated at high temperature through the boiler and continuously circulated.

Since the object to be dried does not directly touch the fire, it is safe to ignite at all and the temperature difference can be freely adjusted according to the material.

A large amount of steam generated in the drying furnace is absorbed by a high-speed adsorber and simultaneously reduced by water and discharged.

Conventional techniques use Fen to discharge into the atmosphere, because the low temperature drying does not generate a large amount of steam. Moisture concentration is always high around the machine.

On the other hand, a conventionally known drying furnace is usually a batch drying furnace for drying a certain amount of drying objects at a time, or a rotary kiln drying furnace. Such a batch drying furnace and a rotary kiln drying furnace are a direct drying method of a dry hot air that causes a drying action by directly contacting a hot air of air heated to a high temperature with a drying object. However, this direct drying method includes a small flame in the dry hot air because the methane gas or the volatile substance is discharged from the vegetable during the drying process if the object is a vegetable, resin (plastic) or sludge. If present, it has a disadvantage of being directly connected to fire. In addition, it is difficult to maintain a constant drying temperature by heat directly applied by hot air, and drying occurs only on the surface of a drying object such as plant material, resin (plastic) and sludge, and drying of moisture contained therein is insufficient. Drying is required.

Therefore, the direct drying method of dry hot air cannot guarantee stable drying quality of plant, resin (plastic) and sludge, and long time drying is not suitable for preservation of fiber and volatile components contained in the material and high energy consumption. Since it is a low efficiency drying method required, it is inadequate drying method for incineration combustion such as plant material, resin (plastic), and sludge according to the prior patent application No. 2009-0073339.

Therefore, an object of the present invention is to provide a drum drying furnace in an indirect drying method capable of high-quality drying suitable for the production of coal briquettes using plant material, resin (plastic) and sludge.

In addition, another object of the present invention is to provide a drum drying furnace for drying plants, resins (plastics) and sludge having excellent energy efficiency.

In addition, the present invention has another object to provide a drum drying furnace for drying the vegetable, resin (plastic) and sludge excellent in productivity can be continuously dried.

Drum drying furnace for the vegetable, resin (plastic) and sludge drying according to the present invention, a cylindrical body having a space for receiving a drying object therein includes a circular both end surface and the side connecting the both end surfaces, the side A front end of the drum is provided with an inlet for drying the object, the rear end of the side is provided with a discharge port of the drying object is completed; and a hollow pipe disposed along the central longitudinal axis of the drum in the drum, the motor A stirring shaft mounted to both end surfaces of the drum to be rotatable by a plurality of stirring holes, the stirring shaft having a plurality of through holes formed on the surface thereof, and a plurality of stirring shovels fixed along the radial direction of the stirring shaft on a surface of the stirring shaft; Hollow pipe surrounding the side of, the heated heat medium is supplied from the outside heat medium pipe flowing; It includes; and a mist discharge pipe extending from the stirring shaft to the outside.

In addition, the present invention is characterized in that a part of the free end of the stirring shovel is inclined in the range of 3 ~ 6 ° in the direction opposite to the rotation direction of the stirring shaft.

In particular, the inclined part of the free end of the stirring shovel may have a variable inclination angle in a range of ± 3 °.

And the stirring shovel is arranged in a spiral on the stirring shaft, in particular the stirring shovel is characterized in that it is arranged in a spiral direction for moving the drying object contained in the drum toward the discharge port in accordance with the rotation of the stirring shaft.

In addition, the end of the free end of the stirring shovel may further include a rubber in close contact with the inner surface of the drum.

In addition, in a preferred embodiment of the present invention, between the plurality of stirring shovels, the steam suction pipe communicating with the stirring shaft is alternately arranged with the stirring shovel.

And it is preferable that the side of the drum further includes a heat insulating material covering the heat medium tube.

In a preferred embodiment of the present invention, the heat medium is alcohol, the temperature of the heat medium flowing through the heat medium tube is characterized in that the range of 90 ~ 400 ℃.

On the other hand, the inlet is preferably further provided with a hopper containing a transfer screw for continuously feeding the drying object into the drum.

In addition, the mist discharge pipe is characterized in that it is forcibly connected to the high speed suction discharge the mist flowing into the hollow inside the stirring shaft.

More preferably, the end of the mist discharge pipe further includes a cooler for converting the mist into water.

And in another embodiment of the present invention, the drum consists of two or more detachable multi-stage, accordingly the stirring shaft is made of two or more multi-stage detachable, the inlet is arranged in the first stage of the drum And the outlet is arranged at the last end of the drum.

Drum drying furnace for plant, resin (plastic) and sludge drying according to the present invention is suitable for the production of high-calorie coal briquettes that can be used as a practical alternative fuel by using resources that have been previously evaluated as non-economic wastes, and have high energy efficiency and high quality. Indirect low temperature drying is possible.

In addition, the present invention is capable of continuous drying of the plant material, resin (plastic) and sludge enables mass production of dry materials, and in particular, when the drum consisting of the drying furnace is composed of multiple stages, the drying capacity is appropriately changed according to market demand. Another advantage is that energy savings can be achieved by optimizing the temperature of the heat medium supplied to each stage.

1 is a flow chart schematically showing each step of the manufacturing method of drum drying for plant material, resin (plastic) and sludge drying according to the applicant's prior patent application No. 2009-0073339.
Figure 2 is a partial cutaway front view of a drum drying furnace for drying vegetal, resin (plastic) and sludge according to a preferred embodiment of the present invention.
3 is a cross-sectional view of the vegetable, resin (plastic) and sludge drying drum drying furnace of FIG.
Figure 4 is a partial cutaway front view of a drum drying plant, resin (plastic) and sludge drying according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the drum drying furnace for drying plants, resins and sludges according to the present invention will be described in detail.

In the description of one embodiment of the present invention, descriptions of well-known configurations that will be obvious to those skilled in the art will be omitted so as not to obscure the subject matter of the present invention. In addition, terms to be described later are terms defined in consideration of functions or shapes in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, the definitions of these terms should be interpreted based on the contents throughout the specification.

2 is a partial cutaway front view of a drum for drying vegetable, resin (plastic) and sludge drying according to a preferred embodiment of the present invention, FIG. 3 is a cross-sectional side view of the drying drum drying furnace of FIG. Partial cutaway front view of a drum drying furnace for drying plant, resin (plastic) and sludge according to another embodiment of the present invention.

As shown in Figures 2 and 3, the drum drying furnace 10 for the plant material, resin (plastic) and sludge drying according to an embodiment of the present invention is a cylindrical body having a large space to accommodate the drying object therein In the drum 100, the stirring shaft 200 which is a hollow pipe disposed along the central longitudinal axis of the drum 100 in the drum 100, and the stirring shaft on the surface of the stirring shaft 200 A plurality of stirring shovels 300 fixed along the radial direction of the 200, and the heating medium flowing through the heated heat medium supplied from the outside as a hollow pipe surrounding the side 120 of the drum 100, 400 and the It includes a mist discharge pipe 500 extending from the stirring shaft 200 to the outside.

The drum 100 is a part constituting the body of the drum, the waste resin (plastic) and the sludge drying drum drying apparatus 10 according to the present invention, the circular both end surfaces 110 and the both end surfaces 110 It is a cylindrical body including a side 120 for connecting and empty inside. The inner space is a tree made by crushing the dried object, particularly uneconomical trees to be disposed of, tree branches, leaves, bark, roots, etc. to be supplied through the inlet 130 provided in front of the cylindrical body side 120 It is a place where chips, waste resin (plastic) and sludge are accommodated and dried. The inlet 130 is preferably provided at the upper end of the front end of the drum 100 side 120, the outlet 140 for drying the drying object is completed to correspond to the inlet 130 is discharged to the drum ( 100) is provided in the lower portion of the rear end of the side (120). Here, the "front end" is a portion adjacent to one end surface of the drum 100 at which the input of the drying object and the drying start, and the "rear end" is at the other end surface of the drum 100 where drying is completed and discharge of the drying object occurs. Means adjacent parts.

The side surface 120 of the drum 100 is wrapped by a heat medium pipe 400 which is a hollow pipe flowing heated heat medium supplied from the outside. In a preferred embodiment of the present invention, the heat medium is an alcohol, the temperature of the heat medium flowing through the heat medium pipe 400 is in the range of 90 ~ 400 ℃. The outer surface of the drum 100 wrapped by the heat medium pipe 400 in which the heat medium flows is indirectly heated by heat transfer (especially conduction), and the heat introduced through the outer wall moves to the inner wall of the drum 100 to the inner wall. Will be heated. One of the important features of the present invention is the indirect heating by the heat medium tube 400 outside the drum 100 and the drying temperature at a relatively medium room temperature in the range of 90 to 400 ° C. Indirect and medium-temperature drying proceeds at a temperature of 90 ~ 400 ℃ to produce the best calories of the ingredients for incineration, the thermal efficiency is doubled.

Indirect heating by the heat medium pipe 400 in particular has the advantage that the maintenance of a constant drying temperature through the temperature control of the heat medium compared to the conventional dry hot air method is very easy, because the constant drying temperature is associated with a uniform drying quality Very advantageous for practical use in drying furnaces. If necessary, in order to maintain the temperature of the heat medium pipe 400 more uniformly, a heat insulating material 150 covering the heat medium pipe 400 may be further provided on the side surface 120 of the drum 100.

The stirring shaft 200, which is a hollow pipe, is disposed along the central axis of the drum 100 in the longitudinal direction of the drum 100. The stirring shaft 200 is mounted on both end surfaces 110 of the drum 100 so as to be rotatable by a motor 210 mounted outside the drum 100, for example, a circular drum 100. The stirring shaft 200 is rotatably supported by a bearing member (not shown) fixed at the center of both end surfaces 110. A plurality of through holes 220 are formed on the surface of the stirring shaft 200, and the through holes 220 are agitated from the drying object heated and dried in the drum 100 to be dried by the stirring shaft 200. It serves as a passage to draw inside). Therefore, the stirring shaft 200 not only serves as a shaft for rotating the stirring shovel 300 to be described later, but also functions as a discharge passage of the mist itself.

To the end of the stirring shaft 200, more specifically, the opposite end of one end of the stirring shaft 200 connected to the motor 210 is connected to the mist discharge pipe 500 extending to the outside. The mist discharge pipe 500 serves as a chimney for discharging the mist flowing into the hollow portion inside the stirring shaft 200 out of the drum 100. Preferably the mist discharge pipe 500 is provided with a discharge fan 510, the discharge fan 510 is forcibly discharge the mist by forming a negative pressure in the mist discharge pipe 500 and the hollow shaft. More preferably, the end of the mist discharge pipe 500 may further include a heat exchanger 520 for cooling the mist to a liquid phase (especially water), which is to prevent the mist is released into the atmosphere.

The rapid discharge of these fumes leads to a shortening of the drying time, that is to say an improvement in the drying quality along with the reduction of energy required for drying. This is because when the mist stays inside the drum 100 for a long time, the steam contained in the mist absorbs a part of the heat to be used for drying, which causes waste of energy, and the increase in the mist temperature means that the dry atmosphere temperature rises more than necessary. This is due to the difficulty of intended warm-and-dry.

And the surface of the stirring shaft 200 is provided with a plurality of stirring shovels 300 fixed along the radial direction of the stirring shaft 200. The stirring shovel 300 serves to stir the drying object supplied into the drum 100 to be uniformly dried.

In a preferred embodiment of the present invention, a part of the free end of the stirring shovel 300 is inclined in the range of 3 to 6 ° in the direction opposite to the rotation direction of the stirring shaft 200. This allows the object to be dried by rising to a higher point by the stirring shovel 300 and then dropping so that vigorous stirring occurs, as well as to use the inner wall of the drum 100 heated by the heat medium pipe 400 to be described later. To do this. In addition, it is preferable that the inclined angle of the free end of the stirring shovel 300 can be varied in the range of ± 3 ° so that the inclination angle of the stirring shovel 300 can be adjusted according to the physical properties of the drying object. . For example, as shown in FIG. 3, the variable angle of inclination angle forms a hinge 310 at a portion adjacent to the free end of the stirring shovel 300.

And the stirring shovel 300 may be arranged in a spiral along the stirring shaft 200, in particular the stirring shovel 300 is accommodated in the drum 100 in accordance with the rotation of the stirring shaft 200 drying It is preferable that the object is disposed in a spiral direction to move toward the outlet 140. This can be said that a plurality of stirring shovels 300 to function as a screw for conveying, the spiral arrangement of the stirring shovels 300 to stir the drying target and at the same time transfer them from the inlet 130 to the outlet 140 This brings the advantage that continuous drying can be performed in the drum 100. In addition, it is also possible to control the drying time by adjusting the rotational speed of the stirring shaft 200.

In addition, the end of the free end of the stirring shovel 300 may further include a rubber 320 in close contact with the inner surface of the drum (100). The rubber 320 is to increase the adhesion between the stirring shovel 300 and the inner wall of the drum 100 to allow the object to be dried higher.

On the other hand, if the hopper 132 including the transfer screw 134 for continuously feeding the drying object into the drum 100 in the inlet 130 is provided with a large amount, and to continuously dry the drying object do. At this time, it is preferable that the amount of the drying object inversely proportional to the drying time is introduced by interlocking the rotational speed of the transfer screw 134 with the rotational speed of the stirring shaft 200.

In addition, in the preferred embodiment of the present invention, between the plurality of stirring shovels 300, the steam suction pipe 330 communicating with the stirring shaft 200 may be alternately disposed with the stirring shovel 300. As described above, the mist generated in the drying process of the drying object is discharged to the outside through a plurality of through-holes 220 formed on the surface of the hollow stirring shaft 200, the stirring shaft 200 is the length of the drum 100 Located in the central axis of the direction is somewhat distance from the drying object concentrated on the inner wall side of the drum (100). This means that some time delay may occur in the discharge of the mist through the stirring shaft (200). Therefore, if the vapor suction pipe 330 communicating with the stirring shaft 200 is configured to extend from the stirring shaft 200 and located close to the inner wall of the drum 100, it is possible to discharge the mist discharged from the object to be dried more quickly.

Another feature of the present invention having the configuration of the drum 100 and the stirring shaft 200 and the stirring shovel 300 as described above, the drum 100 is stopped along the longitudinal direction of the drum 100 Only the installed stirring shaft 200 is rotated to stir the dry object. This is different from the conventional rotary kiln type drying furnace is a drum rotating the body and the "a" shaped hook attached to the inner wall of the drum stirs the drying object. Accordingly, in the present invention, since the inertial mass of the rotating object is significantly reduced for stirring, power required for rotation is reduced, and energy efficiency is improved. In addition, according to the present invention, active stirring occurs in the drying object in the drum 100 by the configuration of the spiral 320 of the stirring shovel 300 and the configuration of the rubber 320 coupled to the free end of the stirring shovel 300. Ensure uniform and good drying quality of the object.

Meanwhile, in the exemplary embodiment of the present invention shown in FIGS. 2 and 3, the drying furnace 10 is formed by one drum 100, and the drum 100 is placed so that the drying capacity can be changed as necessary. It is also possible to comprise more than one multistage. That is, a two-stage drying furnace is shown as an example of the drying furnace 10 having such a multi-stage structure in FIG. 4 showing another embodiment of the present invention. It is made of a plurality of stages, and thus the stirring shaft 200 is also made of two or more detachable stages, the inlet 130 is disposed in the first stage (100 ') of the drum 100 and the outlet 140 Has a structure that is disposed in the last stage 100 "of the drum 100. Since other configurations are the same as the embodiment of the present invention described with reference to Figures 2 and 3 above, the detailed description thereof will be repeated. Omitted to avoid, of course, when constructing a multi-stage drying furnace, there is a communication between the front and rear ends.

Multi-stage vegetable, resin (plastic) and sludge drying drum drying furnace 10 has the advantage that it is possible to vary the drying capacity by adjusting the number of stages, as well as plant, resin (plastic) and sludge It is also advantageous that the structure can reduce the energy required for drying. That is, the heat medium tube 400 provided in the first drum 100 'provided with the inlet 130 among the multi-stage drums 100' and 100 "is supplied with the highest heat medium, and constitutes the subsequent stage. The overall drying energy can be reduced by supplying the heat medium whose temperature is lowered step by step to the drum 100 ″. Considering that the moisture contained in the material is gradually removed during the drying process, lowering the temperature of the heat medium toward the latter stage does not significantly affect the drying quality and drying time. That's because you can save a lot.

While the invention has been illustrated and described in connection with specific embodiments, it will be understood that various modifications and variations can be made without departing from the spirit and scope of the invention as defined by the appended claims. Anyone who owns it can easily find out.

The present invention is particularly useful for mass-producing dried material with high calorie-renewable fuel because it enables energy-efficient drying of vegetable, resin (plastic) and sludge, which are to be dried, with high energy efficiency and continuous drying. Do.

10: drum drying 100: drum
100 ': Drum in first stage 100 ": Drum in last stage
110: both ends of the drum 120: the side of the drum
130: inlet 132: hopper
134: transfer screw 140: outlet
150: heat insulating material 200: stirring shaft
210: motor 220: through hole
300: stirring shovel 310: hinge

Claims (14)

A cylindrical body having a space for accommodating a drying object therein includes a circular both ends and a side connecting the two end surfaces, the front end of the side is provided with the inlet of the drying object, the rear end of the side is complete drying A drum having an outlet for drying the object;
A hollow pipe disposed inside the drum along a longitudinal center axis of the drum, the stirring shaft being mounted to both end surfaces of the drum to be rotatable by a motor and having a plurality of through holes formed on the surface thereof;
A plurality of stirring shovels fixed along the radial direction of the stirring shaft on a surface of the stirring shaft;
A hollow pipe surrounding the side of the drum, the heat medium pipe flowing heated heat medium supplied from the outside; And
A mist discharge pipe extending from the stirring shaft to the outside;
Drying drum containing vegetable, resin and sludge drying.
The method according to claim 1,
And a part of the free end of the stirring shovel is inclined in a range of 3 to 6 ° in a direction opposite to the rotational direction of the stirring shaft.
The method according to claim 2,
Drying drum of the vegetable, resin and sludge drying, characterized in that the inclined angle of the inclined portion of the free end of the stirring shovel can be varied in the range of ± 3 °.
The method according to claim 1,
Drums for drying the vegetable, resin and sludge drying, characterized in that the stirring shovel is arranged spirally on the stirring shaft.
The method of claim 4,
The stirring shovel is a drum drying furnace for plant, resin and sludge drying, characterized in that arranged in a spiral direction for moving the drying object accommodated in the drum toward the discharge port in accordance with the rotation of the stirring shaft.
The method according to any one of claims 2 to 5,
At the end of the free end of the stirring shovel, the drum for drying the plant material, resin and sludge, characterized in that it further comprises a rubber in close contact with the inner surface of the drum.
The method of claim 6,
A drum drying furnace for plant material, resin and sludge drying, characterized in that the steam suction pipe communicating with the stirring shaft is alternately arranged with the stirring shovel between the plurality of stirring shovels.
The method according to claim 1,
Side of the drum is a drum drying furnace for drying vegetal, resin and sludge, characterized in that the heat insulating material further covering the heat pipe.
The method according to claim 1,
The heating medium is a drum for drying plants, resins and sludge drying, characterized in that the alcohol.
The method according to claim 1 or 9,
The temperature of the heat medium flowing through the heat medium pipe is a drum drying furnace for plant material, resin and sludge drying, characterized in that the range of 90 ~ 400 ℃.
The method according to claim 1,
The inlet is a drum drying furnace for drying plants, resins and sludges, characterized in that the hopper further comprises a hopper containing a transfer screw for continuously feeding the drying object into the drum.
The method according to claim 1,
The drum of the plant, resin and sludge drying drum, characterized in that the fume discharge pipe is connected to a strong discharger forcibly suctioning the fume introduced into the hollow portion inside the stirring shaft.
The method according to claim 1 or 12,
At the end of the mist discharge pipe is a drum drying furnace for drying plants, resins and sludges, further comprising a heat exchanger for cooling the mist in a liquid state.
The method according to claim 1,
The drum consists of two or more detachable multi-stages, and thus the stirring shaft also consists of two or more detachable multi-stages. The inlet is arranged at the first end of the drum and the outlet is at the last end of the drum. Drum drying furnace for plant, resin and sludge drying, characterized in that it is disposed.

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