KR102495068B1 - Device for preventing losing ore for rotary kiln - Google Patents

Abstract

A device for preventing ore loss in a rotary kiln is provided. The ore loss prevention device according to the present invention is installed in the rotating part for providing a moving passage of ore, the fixing part for loading and discharging ore, the sealing part for sealing between the rotating part and the fixing part, and the fixing part, It includes an ore loss prevention unit for blocking the movement of ore accumulated at the bottom to the sealing unit.

Description

Ore loss prevention device of rotary kiln {DEVICE FOR PREVENTING LOSING ORE FOR ROTARY KILN}

The present invention relates to a device for preventing ore loss in a rotary kiln.

A rotary kiln is a device that stirs and heats raw materials such as ores into a rotating barrel and transports them. It is used for waste treatment, etc.

In general, a rotary kiln is composed of a rotating part inclined at a set angle with respect to a horizontal plane and a fixed part installed at both ends of the rotating part.

In one fixing part, ore is charged, and the charged ore is spirally transported along the rotating part and moved to the other fixing part.

In the other fixing part, the air and fuel supplied in an appropriate ratio react with the flame generated from the burner to form a flame. This flame dries and heats the moving ore in the rotating part.

At this time, some of the fine particles and dust are blown into the duct along the exhaust gas generated by the flame, and in this process flow out to the sealing part between the rotating part and the fixed part of the rotary kiln.

The sealing part is continuously installed along the circumference of the rotating part, and most fine powder and dust are lost to the outside at the upper and lower parts.

In the upper part of the sealing part, fine powder and dust transported along the flow of exhaust gas are discharged, and in the lower part, fine powder and dust accumulated in places other than the upper part descend along the wall of the sealing part and pile up, and are discharged to the outside due to physical factors, so that a lot of ore is charged compared to the input amount. this is being lost

The present invention is to provide a rotary kiln ore loss prevention device that can improve the efficiency and productivity of the rotary kiln by blocking ore flowing out of the sealing unit of the rotary kiln.

The apparatus for preventing loss of ore in a rotary kiln according to an embodiment of the present invention is a rotating part inclined at a set angle with respect to the horizontal plane and providing a passage for moving ore, a fixing part installed at both ends of the rotating part and loading and discharging ore, It is installed on the circumferential surface of the rotating part and may include a sealing part for sealing between the rotating part and the fixed part.

In addition, the ore loss prevention device is installed in the fixing part to prevent the ore accumulated at the bottom of the fixing part from moving to the sealing part and to prevent ore loss by stagnating the air flow around the sealing part to prevent loss of ore. wealth may be included.

The ore loss prevention unit may include a main plate having a central opening and a coupling plate installed on an outer edge of the main plate and coupled to the fixing part.

In addition, the ore loss prevention unit is installed on the main plate along the edge of the central opening to the inside of the main plate and may include a blocking plate for blocking ore accumulated at the bottom of the fixing unit from passing to the sealing unit.

The main plate may be formed in a circular plate shape, and the coupling plate and the blocking plate may be formed in a circular pipe shape.

The blocking plate may be installed to have a gap of a predetermined size with the inner circumferential surface of the rotation unit.

The gap can be set to 20 mm or less for stagnation of gas flow in the space between the coupling plate and the blocking plate.

A plurality of heat deformation prevention plates may be installed on the main plate and the coupling plate at set intervals.

The heat deformation prevention plate may have a quadrilateral structure including a first coupling portion coupled to one surface of the main plate and a second coupling portion coupled to an inner surface of the coupling plate and forming a set angle with the first coupling portion.

The height of the second coupling portion may gradually decrease as the distance from the point where the second coupling portion meets the first coupling portion increases.

The coupling plate may extend from an outer edge of the main plate in a direction perpendicular to one surface of the main plate.

The blocking plate may extend from an inner edge of the main plate in a direction perpendicular to one surface of the main plate.

According to an embodiment of the present invention, productivity can be improved by increasing production efficiency compared to the loading amount of the rotary kiln by blocking ore flowing out of the sealing part of the rotary kiln, and thus, the environment around the rotary kiln can be improved. and prevent air pollution in the surrounding area.

In addition, even after installation of the ore loss prevention device of the present invention, there is no interference with the separation of the fixed part and the rotating part, and since there is no additional resource to be supplied, semi-permanent use is possible without additional costs except for installation costs.

In addition, in terms of manufacturing, since it has a vertical and horizontally symmetrical shape, partial replacement of materials and partial repair are easy. As a result, the amount of ore loss can be reduced.

1 is a schematic partial configuration diagram of an ore loss prevention device of a rotary kiln according to an embodiment of the present invention.
Figure 2 is a perspective view of some details of the ore loss prevention device of the rotary kiln according to an embodiment of the present invention.
Figure 3 is a schematic partial configuration diagram for explaining the operating state of the ore loss prevention device of the rotary kiln according to an embodiment of the present invention.
4 is a screen captured by an internal flow velocity analysis program of a rotary kiln according to a comparative example.
5 is a screen captured by an internal flow velocity analysis program of a rotary kiln according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described so that those skilled in the art can easily practice it. As can be easily understood by those skilled in the art to which the present invention pertains, the embodiments described below may be modified in various forms without departing from the concept and scope of the present invention. Where possible, identical or similar parts are indicated using the same reference numerals in the drawings.

The terminology used below is only for referring to specific embodiments and is not intended to limit the present invention. As used herein, the singular forms also include the plural forms unless the phrases clearly indicate the opposite. As used herein, the meaning of "comprising" specifies specific characteristics, regions, integers, steps, operations, elements, and/or components, and other specific characteristics, regions, integers, steps, operations, elements, elements, and/or groups. does not exclude the presence or addition of

All terms including technical terms and scientific terms used below have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. The terms defined in the dictionary are additionally interpreted as having a meaning consistent with the related technical literature and the currently disclosed content, and are not interpreted in an ideal or very formal meaning unless defined.

1 is a schematic partial configuration of a rotary kiln ore loss prevention device according to an embodiment of the present invention, and FIG. 2 is a partial perspective view of a rotary kiln ore loss prevention device according to an embodiment of the present invention.

Figure 3 is a schematic partial configuration diagram for explaining the operating state of the ore loss prevention device of the rotary kiln according to an embodiment of the present invention.

1 to 3, the ore loss prevention device of the rotary kiln according to an embodiment of the present invention includes a rotating part 10, a fixing part 20, a sealing part 30, and an ore loss prevention unit 100 ) may be included.

The rotation unit 10 is inclined at a set angle with respect to the horizontal plane and may provide a passage for the ore 1 to move.

In addition, the fixing part 20 may be installed at both ends of the rotating part 10, charge the ore 1 by the screw 21, and discharge the ore 1 through a discharge port (not shown).

In FIG. 1, for convenience of description, it is shown that the fixing part 10 is installed at one end of the rotating part 10, and another fixing part having a discharge port may be installed at the other end of the rotating part 10.

The sealing part 30 is installed on the circumferential surface of the rotating part 10 to seal between the rotating part 10 and the fixed part 20 .

The screw 21 may be installed in the fixing part 20 in an inclined state at a set angle with respect to the horizontal plane so that the ore 1 can be easily loaded into the fixing part 20.

In addition, the ore loss prevention unit 100 is installed on the fixing unit 20 to block the movement of the ore 1 accumulated on the lower portion of the fixing unit 20 to the sealing unit 30, as well as sealing unit 30 Loss of the ore 1 can be prevented by stagnating the surrounding air flow and preventing it from escaping to the outside of the sealing unit 30 .

A discharge pipe 40 may be installed at the upper end of the fixing part 20 to discharge exhaust gas generated during heating and drying of the ore 1 inside the rotating part 10 to a dust collector (not shown).

In addition, the ore loss prevention unit 100 may block the ore 1 from moving to the sealing unit 30 together with the flue gas.

Here, the ore 1 may include fine powder and dust generated during heating and drying of the ore 1 inside the rotating part 10.

The ore loss prevention unit 100 includes a main plate 110 having a central opening 111, a coupling plate 120 installed along the outer edge of the main plate 110 and coupled to the fixing unit 20. can do.

In addition, the ore loss prevention unit 100 is installed on the main plate 110 along the edge of the central opening 111 to the inside of the main plate 110, and the ore accumulated in the lower part of the fixing part 20 is sealed. It may include a blocking plate 130 for blocking so as not to go over to (30).

The main plate 110 may firmly support the coupling plate 120 and the blocking plate 130 to maintain the shape of the ore loss prevention unit.

In this embodiment, the coupling plate 120 may be fixedly coupled to the fixing part 20 by welding or the like.

The coupling plate 120 may extend from an outer edge of the main plate 110 to a set length in a direction perpendicular to one surface of the main plate 110 so as to be firmly coupled to the fixing part 20 .

In this embodiment, the main plate 110 and the coupling plate 120 are formed in a circular plate shape for easy coupling with the fixing part 20, and the coupling plate 120 has a circular pipe shape, etc. , The central opening 111 may have a circular shape having the same center of diameter as the main plate 110 .

Here, the inner surface of the main plate 110 to which the blocking plate 130 is coupled may refer to a surface of the main plate 110 corresponding to an edge of the central opening 110 .

Accordingly, the blocking plate 130 may also have a circular pipe shape having the same center of diameter with respect to the main plate 110 like the central opening 111 .

The blocking plate 130 is one surface of the main plate 110 from the inner edge of the main plate 110 to easily block the ore 1 accumulated in the lower part of the fixing part 20 from passing to the sealing part 30. It extends in a direction perpendicular to the set length, that is, it may be disposed parallel to the coupling plate 120.

In addition, the blocking plate 130 may extend to the same set length as the coupling plate 120 to more easily block the ore 1 accumulated in the lower portion of the fixing part 20 from passing to the sealing part.

The blocking plate 130 may be installed to have a gap t of a predetermined size with the inner circumferential surface of the rotating part 10 in order to provide a gas inlet passage in the space between the coupling plate 120 and the blocking plate 130.

The gap t may be set to, for example, 20 mm or less so as to stagnate the gas flow in the space between the coupling plate 120 and the blocking plate 130, but is not limited thereto, and may be set to 20 mm or more as needed. Of course you can.

A heat deformation prevention plate 140 may be installed on the main plate 110 and the coupling plate 120 to prevent thermal deformation of the main plate 110 and the coupling plate 120 .

A plurality of heat deformation prevention plates 140 are disposed at set intervals on one surface of the main plate 110 and the inner surface of the coupling plate 120, and 24 are shown in FIG. 2, but are not limited thereto, and as needed It goes without saying that 24 or more or less can be installed.

In addition, the heat deformation prevention plate 140 is coupled to the first coupling portion 141 coupled to one surface of the main plate 110, and the inner surface of the coupling plate 120 and the first coupling portion 141 and the set angle It may have a quadrilateral structure including the second coupling part 143 forming (θ).

Here, the inner surface of the coupling plate 120 may refer to a surface of the coupling plate 120 facing the central portion of the main plate 110 .

The length of the second coupling portion 143 may be set longer than the length of the first coupling portion 131 in order to prevent easy thermal deformation of the main plate 110 and the coupling plate 120 .

The set angle (θ) may be set at a right angle to easily prevent thermal deformation of the main plate 110 and the coupling plate 120 of).

The height H of the second coupling portion 143 is such that the second coupling portion 143 meets the first coupling portion 141 so as to effectively prevent thermal deformation of the main plate 110 and the coupling plate 120. It may be set to gradually decrease as the distance from the point P increases.

Here, the height H of the second coupling portion 143 may refer to the shortest distance between a straight line formed by the second coupling portion 143 and the corresponding side 145 of the second coupling portion 143 .

Hereinafter, with reference to FIGS. 1 to 3, the operation of the ore loss prevention device of the rotary kiln according to an embodiment of the present invention will be described.

When the rotary kiln is operated, ore 1 is charged into the rotating part 10 through the screw 21 installed in the fixing part 20 disposed at one end of the rotating part 10.

The ore 1 charged into the rotating part 10 is heated and dried inside the rotating part 10 and then discharged through an outlet (not shown) installed in the fixing part 20 disposed at the other end of the rotating part 10. do.

At this time, exhaust gas generated during heating and drying inside the rotating part 10 is discharged to a dust collector (not shown) through the discharge pipe 40.

When the rotary kiln operates in this way, the air inflow passage inside the ore loss prevention unit 100 is the sealing unit 30 and the gap t between the blocking plate 130 and the inner circumferential surface of the rotating unit 10. .

That is, the outside of the sealing part 30 is at atmospheric pressure and the inside of the rotating part 10 of the rotary kiln is negative pressure (eg, -2mmAq), and the exhaust gas moves through the gap t rather than the inflow of external air in the sealing part 30. It is possible to enter the inside of the ore loss prevention unit 100 only as.

However, since the air flow inside the ore loss prevention unit 100 is stagnant by the blocking plate 130, the inflow of fine powder and dust through the inflow of exhaust gas will be extremely small.

When the ore 1 of the screw 21 is charged, the ore 1 away from the screw 21 falls to the lower part of the fixing part 20 and accumulates from the lower part of the fixing part 20, but as shown in FIG. Movement to the sealing part 30 can be completely blocked by the blocking plate 130 .

That is, since the blocking plate 130 separates the sealing part 30 independently, the ore 1 accumulated on the lower part of the fixing part 20 can be blocked from flowing out of the sealing part 30 to the outside. .

Therefore, by blocking the ore 1 flowing out of the sealing part 30 of the rotary kiln, productivity can be improved by increasing the production efficiency compared to the loading amount of the rotary kiln, and thus, the environment around the rotary kiln can be improved. and prevent air pollution in the surrounding area.

4 is a screen captured from the internal flow rate analysis program of the rotary kiln according to a comparative example, and FIG. 5 is a screen captured from the internal flow rate analysis program of the rotary kiln according to an embodiment of the present invention.

In the rotary kiln according to the comparative example, the ore loss prevention unit 100 of the present invention is not installed, and in the embodiment of the present invention, the ore loss prevention unit 100 is installed in the rotary kiln.

Comparing Figure 4 and Figure 5, in the case of the embodiment in which the ore loss prevention unit 100 of the present invention is installed, it can be seen that the flow rate of the discharge pipe 40 portion is significantly reduced compared to the case of the comparative example.

In addition, in the case of the comparative example, the flow velocity is generated in the sealing part 30, but it can be seen that the flow velocity is not generated in the sealing part 30 of the embodiment of the present invention.

Accordingly, the load of the dust collector (not shown) can be reduced, and the amount of fine powder and dust that has risen along the exhaust gas in the direction of the discharge pipe 40 falls again, leading to an increase in the amount falling to the lower part of the fixing part 20.

Fine particles and dust that have fallen to the lower part of the fixing part 20 accumulate on the lower part of the fixing part 20 and pile up to the lowermost end of the blocking plate 130, and are pushed toward the rotating part 10 while forming an angle of repose.

If there is no ore loss prevention unit 100 as in the comparative example, fines and dust accumulated at the bottom of the fixing unit 20 are pushed out from the bottom of the sealing unit 30 and scattered or fall to the outside, thereby reducing production and reducing the surrounding environment. The risk of contamination is very high.

Although the present disclosure has been described through preferred embodiments as described above, the present invention is not limited thereto and various modifications and variations are possible without departing from the scope of the claims described below. Those in the field will easily understand.

10: rotating part
20: fixing part
30: sealing part
100: ore loss prevention unit
110: main plate
120: coupling plate
130: blocking plate
140: heat deformation prevention plate

Claims (10)

A rotating part inclined at a set angle with respect to the horizontal plane and providing a passage for ore;
A fixing unit installed at both ends of the rotating unit and loading and discharging the ore;
A sealing part installed on the circumferential surface of the rotating part to seal between the rotating part and the fixing part, and
Ore loss prevention unit installed in the fixing unit to block the movement of the ore accumulated at the bottom of the fixing unit to the sealing unit and to prevent the loss of the ore by stagnating the air flow around the sealing unit.
including,
The ore loss prevention unit,
a main plate with a central opening;
A coupling plate installed on an outer edge of the main plate and coupled to the fixing part, and
A blocking plate installed on the main plate along the edge of the central opening to the inside of the main plate and blocking the ore accumulated on the lower part of the fixing part from passing to the sealing part,
In the fixing part, a screw for loading the ore into the fixing part is installed in a state inclined at a set angle with respect to the horizontal plane,
The blocking plate is installed to have a gap of a set size with the inner circumferential surface of the rotating part to provide a gas inflow passage of the space between the coupling plate and the blocking plate,
A plurality of heat deformation prevention plates are installed on the main plate and the coupling plate at set intervals, ore loss prevention device of the rotary kiln. delete According to claim 1,
The main plate is made of a circular plate shape, the coupling plate and the blocking plate are ore loss prevention device of the rotary kiln made of a circular pipe shape. delete According to claim 1,
The gap is set to 20mm or less to prevent gas flow in the space between the coupling plate and the blocking plate. delete According to claim 1,
The thermal deformation prevention plate has a quadrilateral structure including a first coupling part coupled to one surface of the main plate, and a second coupling part coupled to an inner surface of the coupling plate and forming a set angle with the first coupling part. A device for preventing ore loss in a rotary kiln. According to claim 7,
The height of the second coupling portion ore loss prevention device of the rotary kiln that the second coupling portion gradually decreases as the distance from the point where the second coupling portion meets the first coupling portion. According to claim 1,
The coupling plate ore loss prevention device of the rotary kiln extending in a direction perpendicular to one surface of the main plate from the outer edge of the main plate. According to claim 9,
The blocking plate ore loss prevention device of the rotary kiln extending in a direction perpendicular to one surface of the main plate from the inner edge of the main plate.

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