KR20170057159A - Material supplying apparatus for melting furnace - Google Patents

Abstract

The present invention relates to a material supplying apparatus for a melting furnace. According to one aspect of the present invention, a material supplying apparatus for a melting furnace comprising: a driving portion provided in a melting furnace; a transfer screw connecting to the driving portion at one end to receive rotation force, and forming a screw thread on a cylindrical body and an outer circumferential surface of the body; a first case accommodating the transfer screw; and a second case accommodating the first case and forming a cooling space, an inlet, and an outlet, wherein an inner circumferential surface of the cooling space is spaced apart at a predetermined distance from an outer circumferential surface of the first case, the inlet introduces an air or a fluid into the cooling space, and the outlet discharges the air or the fluid from the cooling space.

Description

[0001] MATERIAL SUPPLYING APPARATUS FOR MELTING FURNACE [0002]

The present invention relates to a raw material feed device for a melting furnace.

A melting furnace is a device that includes a melting tank and a heating source, and places the raw material in a melting tank and heats and melts and melts the raw material.

The melting furnace can melt and melt various materials, and can be used, for example, to melt glass. In recent years, with the development of the information and communication industry, high quality glass such as substrate glass for TFT LCD (THIN FILM TRANSISTOR - LIQUID CRYSTAL DISPLAY) and PDP (PLASMA DISPLAY PANEL) substrate glass has begun to be demanded.

In such a melting furnace, a raw material supplying device for supplying raw materials into the melting furnace is used, and generally a conveyor system or a screw system is used.

Here, most of the fine particle raw materials are conveyed by the latter screw system due to the fear of dust or the like. Such a screw system is manufactured and used so that it can be used at room temperature or below 100 ° C. When used at a high temperature (about 250 ° C or higher), the particulate material hardens or melts in the feeder due to high temperature heat, And the like.

In addition, since the screw conveying apparatus currently used is made of stainless steel, the apparatus can not be used at a temperature of about 1450 ° C or higher because there is a danger that the material may reach deformation or magnetic melting point.

Particularly, in manufacturing a substrate glass which is important due to the development of the information communication industry, since the melting temperature of the melting furnace is extremely high because the conditions such as low density, heat resistance, durability, chemical resistance and mechanical characteristics must be satisfied, The above-described problem may arise.

Patent Document 1: Japanese Patent No. 4105541 (Apr. 04, 2008) Patent Document 2: Japanese Patent No. 4360158 (Aug. 21, 2009)

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problems. It is an object of the present invention to provide a method and apparatus for producing fine granular materials, To provide a raw material feed device for a melting furnace capable of transferring a raw material.

According to an aspect of the present invention, there is provided a fuel cell system including: a driving unit installed in a melting furnace; A conveying screw having a cylindrical body and a thread formed on an outer circumferential surface of the body; A first case for accommodating the conveying screw; And a cooling case having an inner circumferential surface spaced apart from the outer circumferential surface of the first case by a predetermined distance, an inlet for introducing air or fluid into the cooling space, and an air outlet for discharging air or fluid from the cooling space. And a second case in which a discharge port for discharging the molten metal is formed.

The second case further includes a pair of sealing units for receiving a part of the first case from the free end of the conveying screw in the direction of the driving unit and sealing both ends of the first case and the second case A raw material feeding device for the melting furnace can be provided.

Further, a raw material supply device for a melting furnace may be further provided, which further comprises a raw material supply portion disposed through the first case and supplying the raw material to the transfer screw.

The cooling space may include a first partition wall disposed between an outer circumferential surface of the first case and an inner circumferential surface of the second case; And a second partition wall spaced a predetermined distance from the first partition and disposed between an outer circumferential surface of the first case and an inner circumferential surface of the second case.

Further, a raw material supply apparatus for a molten furnace in which the inlet port communicates with one side of one of the two spaces formed from the first and second diaphragms, and the discharge port communicates with another space may be provided.

Further, the raw material supply device for the melting furnace, which is formed so that the inlet port faces the ground, may be provided.

In addition, the body may further include a cooling pipe formed with a through hole passing through the center, and a coolant pipe inserted into the through hole to supply the coolant to the inner space of the body.

At least a part of the first case and the second case which are exposed to the heating space are made of at least one of iron (Cr) 23%, aluminum (Al) 5%, molybdenum (Mo) 3% A raw material feeding apparatus for a melting furnace formed of an alloy may be provided.

According to the apparatus for feeding a raw material for a melting furnace according to an embodiment of the present invention, there is an advantage that the raw material can be transferred to a desired place without the raw materials of the fine particles being bundled due to high heat or fused to the inner surface of the transfer device.

1 is a front view showing a configuration of a melting furnace having a raw material supply device according to an embodiment of the present invention.
2 is a side cross-sectional view of a raw material supply apparatus according to an embodiment of the present invention.
3 is a side view of a screw according to an embodiment of the present invention and a cooling pipe disposed in the screw.
4 is a cross-sectional view of a housing according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Unless defined otherwise, all terms used herein are the same as the generic meanings of the terms understood by those of ordinary skill in the art, and where the terms used herein contradict the general meaning of the term, they shall be as defined herein.

It is to be understood, however, that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

1 is a front view showing a configuration of a melting furnace having a raw material supply device according to an embodiment of the present invention.

Referring to FIG. 1, a melting furnace 100 according to an embodiment of the present invention includes a frame 170 forming an overall structure, a housing 110 installed in a frame 170 and having a heat generating portion, And a raw material supply device 200 for supplying the raw material to the molten bath 140.

The housing 110 is provided with a heating portion to provide a heating space. Heat generated in the heating portion is transferred to the melting vessel 140 to melt the raw material of the melting vessel 140.

The raw material supply device 200 may be installed on one side of the housing 110, not on the upper side of the housing 110, and the raw material discharge port through which the raw material is discharged may be positioned higher than the molten bath 140.

The raw material supplying apparatus 200 includes a hopper 150 into which raw materials are inputted and a feed screw 210 and a feed screw 210 which are connected to the hopper 150 to feed the raw material discharged from the hopper 150 into the melting vessel 140 And a driving unit 160 for driving the conveying conveying screw 210. The raw material advancing by the conveying conveyance screw 210 can drop into the melting vessel 140 by a predetermined distance.

In the present embodiment, the raw material is exemplified as glass, but the idea of the present invention is not limited to this, and it may be any raw material requiring melting and melting such as bauxite extract and metal powder such as iron sludge which can be recycled .

For example, the inner surface of the melting vessel 140 may be formed of an iron alloy, and the inner surface of the melting vessel 140 may be formed of an iron alloy. Examples of the iron alloy include Cr 23, Al 5%, Molybdenum 3% 69%. ≪ / RTI > In this embodiment, a case in which the melting vessel 140 is formed and the case having a flow path for cooling is formed of an iron alloy will be described as an example. Specifically, " Kanthal APMT " may be used as the material of the melting vessel 140. In this case, as the raw material reacts at a high temperature, the aluminum having the lightest specific gravity reaches the surface layer of the structure and reacts with oxygen to form an aluminum oxide (Al2O3) coating layer on the surface of the molten bath 140, Such a coating layer can improve the durability of the melting vessel 140 because the mechanical characteristics and the structure are not changed even at a high temperature. A refrigerant may be supplied to the flow path, and the melting vessel 140 may further include an inlet and an outlet for the inflow and discharge of the refrigerant.

Further, as the molten bath 140 is cooled, the raw material in the molten bath 140 can be roughly divided into a raw material layer, a crystal layer, and a molten layer. Specifically, the lower portion of the melting vessel 140, that is, the portion in contact with the inner wall of the melting vessel 140 receives less heat and directly receives the cooling effect of the melting vessel 140, And may be a raw material layer as it is as raw material. Since the uppermost portion of the melting vessel 140 is the portion facing the housing 110 closest to the housing 110, it is the portion that receives the most heat, so that the raw material melts to form a molten layer. Finally, the middle portion between the raw material layer and the molten metal layer receives hot heat in the molten metal layer and receives cold cool air in the raw material layer in the lower portion, thus forming a hardened layer, i.e., a crystalline layer, which is neither melted nor raw.

In this case, the raw material layer and the crystal layer in the melting vessel 140 serve as refractory materials, which can prevent deformation of the melting vessel 140 and prevent foreign matter from entering the melting vessel 140, It is possible to strengthen and manufacture high quality.

On the other hand, the melting vessel 140 can be provided interchangeably. To this end, the molten bath 140 may be provided so as to be movable in the vertical direction of the frame 170, and an auxiliary molten bath 180 for replacement may be disposed on one side of the frame 170.

3 is a side view of a screw according to an embodiment of the present invention and a cooling pipe disposed in the screw, and Fig. 4 is a side view of the embodiment of the present invention. Fig. Fig.

2 to 4, the raw material supplying apparatus 200 may include a conveying screw 210 and a case 220.

Specifically, the driving unit 160 may provide a driving force to the conveying screw 210, and the driving unit may be a motor.

The conveying screw 210 may include a cylindrical body 211 and a thread 212 formed on an outer circumferential surface of the body 211,

The case part 220 can receive the conveying screw 210. Specifically, the case 220 may include a first case 221 for receiving the feed screw 210 and a second case 222 for receiving the first case 221.

The second case 222 includes a cooling space 223 having an inner circumferential surface spaced apart from the outer circumferential surface of the first case 221 by a predetermined distance and an inlet 223 for introducing a refrigerant such as air or liquid into the cooling space 223 And a discharge port 225 for discharging the refrigerant from the cooling space 223.

Therefore, the refrigerant flows to the outside of the first case 221 surrounding the conveyance screw 210 according to the embodiment, and the raw material flowing along the inside of the first case 221 can be cooled. Therefore, , 150 占 폚 or more and 1700 占 폚 or less), the particulate raw material can be effectively prevented from reaching the target site without being scattered or thermally deformed.

Also, the second case 222 may be formed of a kanthal alloy, and may be formed of a cantal preferably of iron (Fe) 68%, chromium (Cr) 23% and aluminum (Al) 9% .

A part of the first case 221 and the second case 222 may be exposed to the inside of the housing 110 of the high temperature atmosphere, and at least a part of the first case 221 and the second case 222 For example, a Kanthal alloy made of 23% of Cr, 5% of Al, 3% of Mo, and 69% of Fe. For example, the second case 222, which is directly exposed to the high-temperature atmosphere inside the housing 110, may be formed entirely of an iron alloy. Specifically, as the material of the second case 222, " Kanthal APMT " may be used. In this case, when the raw material is reacted at a high temperature, aluminum having the lightest specific gravity reaches the surface layer of the structure and reacts with oxygen to form an aluminum oxide (Al2O3) coating layer on the surface of the second case 222 And the mechanical properties and the structure of the coating layer do not change even at a high temperature, so that the durability of the second case 222 can be further improved.

Meanwhile, the embodiment may further include a raw material injecting unit 230 for injecting a raw material between the space formed by the conveying screw 210 and the first case 221. The raw material input portion 230 may be a device connected to the hopper 150 described above, or may be the hopper 150 itself.

Although the raw material input part 230 may be disposed passing between the second case 222 and the first case 221, in this case, the cooling effect due to the formation of the vortex of the refrigerant flow may be reduced.

The second case 222 receives a part of the first case 221 from the free end of the conveying screw 210 in the direction of the driving part and seals both ends of the first case 221 and the second case 222, And a pair of sealing units (240, 250) which are connected to each other. In this case, only the outer circumferential surface of the first case 221 in which the second case 222 is not disposed may be disposed so as to penetrate the material introduction portion 230.

The inner circumferential surface of the first case 221 may be formed to correspond to the diameter of the thread 212 in order to further increase the cooling effect on the material to be transferred by the transfer screw 210. However, the present invention is not limited to this, and the inner circumferential surface of the first case 221 may be formed larger than the diameter of the thread 212.

The cooling space 223 includes a first partition 226 disposed between the outer circumferential surface of the first case 221 and the inner circumferential surface of the second casing 222 and a second partition 226 spaced apart from the first partition 226 by a predetermined distance, And a second partition wall 227 disposed between the outer circumferential surface of the case 221 and the inner circumferential surface of the second case 222.

The first partition 226 and the second partition 227 may be formed so as to be linearly aligned with each other in the horizontal direction with respect to the center axis of the first case and the first case 221 and the second case 222 are formed It is possible to further increase the surface area of the cooling space 223 and to increase the flow distance of the refrigerant, thereby achieving an excellent cooling effect.

Therefore, in order to increase the flow distance of the refrigerant and smoothly flow the refrigerant, the inlet 224 is connected to one side of one of the two spaces formed from the first partition 226 and the second partition 227, And the outlet 225 can communicate with the other space.

In addition, the inlet 224 may be formed to face the ground, and the outlet may be formed on the opposite side. In this case, since the refrigerant flows in the cooling space 223 while being filled in the opposite direction of gravity, the refrigerant flows smoothly in the cooling space 223, thereby increasing the cooling effect.

On the other hand, the embodiment of the present invention can block the high temperature from the outside as described above, and also can cope with the high temperature inside as described later.

Specifically, the body 211 may further include a cooling pipe 260 formed with a through-hole 211a passing through the center thereof and inserted into the through-hole 211a to supply the refrigerant to the body 211. [ Here, the cooling pipe 260 can be connected to the rotary joint so that the body 211 can be freely rotated, and the refrigerant supplied from the outside can be supplied into the body 211. To this end, the free end of the cooling pipe 260 may be open, and the refrigerant supplied through the cooling pipe 260 may be discharged from the inside of the body 211 to cool the body 211 from the inside thereof, . Alternatively, the cooling pipe 260 may be configured to contact the body 211 to cool the refrigerant flowing through the inside of the cooling pipe 260 through conduction by conduction.

If cooling is performed both inside and outside on the basis of the space between the feed screw 210 and the first case 221 to which the raw material is fed, it is possible to effectively transfer the fine raw material to a desired place even in a high- .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Skilled artisans may implement the pattern of features that have not been explicitly described in combination, substitution of the disclosed embodiments, but which, too, do not depart from the scope of the present invention. It will be apparent to those skilled in the art that various changes and modifications may be readily made without departing from the spirit and scope of the invention as defined by the appended claims.

100: melting furnace 110: housing
140: Melting tank 150: Hopper
160: driving part 170: frame
200: Feedstock supply device 210: Feed screw
211: body 211a: through hole
212: threads 220:
221: first case 222: second case
223: Cooling space 224: Inlet
225: outlet 226: first partition
227: second partition 230: raw material input part
240, 250: sealing unit 260: cooling pipe

Claims (8)

A driving part installed in the melting furnace;
A transfer screw having one end connected to the driving unit and receiving a rotational force, the transfer screw having a cylindrical body and a thread formed on an outer peripheral surface of the body;
A first case for accommodating the conveying screw; And
A cooling space for accommodating the first case and having an inner circumferential surface spaced a predetermined distance from an outer circumferential surface of the first case; an inlet for introducing air or fluid into the cooling space; And a second case in which an outlet is formed. The method according to claim 1,
The second case houses a part of the first case from the free end of the conveying screw in the direction of the driving part,
And a pair of sealing units for sealing both ends of the first case and the second case. 3. The method according to claim 1 or 2,
Further comprising a raw material supply portion disposed through the first case and supplying the raw material to the feed screw. The method according to claim 1,
In the cooling space,
A first partition disposed between an outer circumferential surface of the first case and an inner circumferential surface of the second case; And
And a second partition wall spaced apart from the first partition wall by a predetermined distance and disposed between an outer circumferential surface of the first case and an inner circumferential surface of the second case. 5. The method of claim 4,
Wherein the inlet port communicates with one side of one of two spaces formed from the first and second diaphragms, and the outlet port communicates with another space. 6. The method of claim 5,
Wherein the inlet is formed to face the ground. The method according to claim 1,
The body is formed with a through hole penetrating the center thereof,
And a cooling pipe inserted into the through hole to supply the refrigerant to the inner space of the body. The method according to claim 1,
At least a part of the first case and the second case exposed in the heating space are made of an iron alloy consisting of 23% of chromium (Cr), 5% of aluminum (Al), 3% of molybdenum (Mo) And the raw material supply device for the melting furnace to be formed.

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