KR101606174B1 - Combined melting device for vitrification - Google Patents

Combined melting device for vitrification Download PDF

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Publication number
KR101606174B1
KR101606174B1 KR1020150098077A KR20150098077A KR101606174B1 KR 101606174 B1 KR101606174 B1 KR 101606174B1 KR 1020150098077 A KR1020150098077 A KR 1020150098077A KR 20150098077 A KR20150098077 A KR 20150098077A KR 101606174 B1 KR101606174 B1 KR 101606174B1
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KR
South Korea
Prior art keywords
melting furnace
drum
furnace unit
melting
outlet
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KR1020150098077A
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Korean (ko)
Inventor
최석모
박규원
손인철
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뉴클리어솔루션(주)
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Priority to KR1020150098077A priority Critical patent/KR101606174B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/008—Incineration of waste; Incinerator constructions; Details, accessories or control therefor adapted for burning two or more kinds, e.g. liquid and solid, of waste being fed through separate inlets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/38—Multi-hearth arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44—Details; Accessories
    • F23G5/442—Waste feed arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2202/00—Combustion
    • F23G2202/10—Combustion in two or more stages
    • F23G2202/103—Combustion in two or more stages in separate chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2204/00—Supplementary heating arrangements
    • F23G2204/20—Supplementary heating arrangements using electric energy
    • F23G2204/201—Plasma

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Gasification And Melting Of Waste (AREA)

Abstract

The present invention relates to a composite melting furnace, and a plasma melting furnace and a low-temperature melting furnace can be combined to treat any type of hazardous waste. The low temperature melting furnace is used to vitrify combustible waste, and the plasma melting furnace is classified as a facility for treating flammable and nonflammable. The slag discharged from the low-temperature melting furnace can be selectively discharged outside the plasma melting furnace and the apparatus, and the melt produced in the plasma smelting furnace can selectively discharge the slag and the metal through at least two outlets.

Figure R1020150098077

Description

{COMBINED MELTING DEVICE FOR VITRIFICATION}

The present invention relates to a composite melting furnace system for melting and discharging harmful waste including radioactive waste, wherein the low-temperature melting furnace part is used as a facility for treating liquid waste containing sludge and for handling combustible waste, It is used as a facility capable of treating most wastes including ductility. So that it is possible to perform the single operation and the simultaneous operation, if necessary, for each melting furnace part as required.

More stable handling, storage and management of hazardous wastes, especially radioactive waste from nuclear power generation, is a very important issue. Various techniques such as compression, incineration, and cement solidification have been applied as methods for treating such hazardous wastes. However, each technique has a problem that the cost of detergent is small and secondary damage such as leachate is likely to occur.

Among the methods of treating and storing hazardous waste in some countries, the induction heating type low temperature melting furnace is used to burn harmful waste, and the heavy metals are melted and made into a glass solid with glass to prevent it from leaching into the surrounding environment Low temperature melting furnace vitrification technology has been developed.

As another method, a waste melting method using a plasma torch has been used, and a plasma melting furnace has been used as a kind and size of a melting furnace suitable for use by constructing a separate facility for each company. The plasma melting furnace melts the waste by the plasma torch which generates heat at a high temperature and discharges the metal or slag through the exclusive outlet.

Korea Open Patent No. 2012-0129418 (disclosed on November 28, 2012) Korean Unexamined Patent Publication No. 2005-0004647 (Dec. 12, 2005)

The vitrification apparatus using the conventional low-temperature melting furnace has a problem that it is difficult to treat non-combustible wastes such as metallic ones, and the plasma furnace has a problem that it is difficult to stably vitrify the liquid wastes among the low-level radioactive wastes. Accordingly, it is desired to provide a melting furnace device capable of performing the melting process regardless of the type of waste and efficiently operating according to the amount of waste.

It is an object of the present invention to provide a composite melting furnace for treating hazardous wastes, comprising: a first melting furnace unit for forming a melt by an induction coil; a second melting furnace unit for forming a melt by a plasma torch; And an inner outlet formed in the melt space of the second melting furnace unit so as to allow the melt to move into the melting space of the second melting furnace unit.

The first melting furnace unit includes an inclined bottom portion at an upper portion of the inclined bottom portion and a first outlet port through which at least a portion of the melted material can be discharged to the outside of the composite melting furnace.

The internal discharge port may be formed at a lower portion of the inclined bottom portion of the first melting furnace unit.

The first melting furnace unit may include an outlet shut-off rod for opening and closing the first outlet.

The second melting furnace unit may include a second outlet formed to communicate with at least a part of the side surface of the melt space and a third outlet formed to communicate with the bottom of the melt space.

The inner discharge port of the first melting furnace unit may be formed to communicate with the ceiling portion of the second melting furnace unit melting space.

The second melting furnace unit may include a drum loading port for inputting the drum into the melting space.

The second melting furnace unit may further include a drum loading device for loading a drum into the drum loading port, and the drum loading device may include at least one of a drum transferring device and a drum transferring cylinder.

The drum loading port may include at least one disc closing door.

And a second inlet for introducing the waste into at least a part of the upper portion of the second melting furnace unit may be formed.

The composite melting furnace apparatus of the present invention is an apparatus that combines a plasma melting furnace and a low-temperature melting furnace, and can treat and discharge non-combustible wastes that can not be treated in a low-temperature melting furnace to a plasma melting furnace. The low temperature melting furnace is used to vitrify combustible waste, and the plasma melting furnace is classified as a facility that simultaneously treats flammability and nonflammability. When the slag discharged from the low temperature melting furnace and the slag discharged from the plasma melting furnace have the same characteristics, they can be discharged through the plasma melting furnace outlet.

The low temperature melting furnace is a facility that treats all waste except non-combustible and can operate alone. Since the plasma melting furnace can operate all waste except liquid waste, it can be operated either by selecting two facilities or by operating two types simultaneously Method can be operated efficiently.

In addition, by sharing the exhaust gas treatment facility, it is possible to improve human and material cost saving and operation efficiency, and it is possible to efficiently and safely treat the radiation waste regardless of the kind.

1 is a plan view of a composite melting furnace apparatus according to an embodiment of the present invention.
2 is a vertical cross-sectional view of a composite melting furnace according to an embodiment of the present invention viewed from the front.
3 is a vertical cross-sectional view of a composite melting furnace according to an embodiment of the present invention.

The composite melting furnace system of the present invention is a system that combines a plasma melting furnace and a low-temperature melting furnace, and consists of a system for discharging uncompleted non-combustible wastes in a low-temperature furnace to a plasma melting furnace and completely discharging the waste through a plasma melting furnace outlet. Low temperature melting furnaces are mainly used to vitrify combustible wastes and are used to treat liquid wastes that are difficult to treat with plasma melting furnaces, and plasma melting furnaces are distinguished for use as a furnace that simultaneously treats combustible and nonflammable.

The slag discharged from the vitrification low-temperature melting furnace is divided into discharge by plasma melting and discharge by drum, and the plasma melting furnace is a facility for discharging slag and metal by discharging the discharge gas differently. When the slag discharged from the low temperature melting furnace and the slag discharged from the plasma melting furnace have the same characteristics, they can be discharged through the plasma melting furnace outlet.

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail with reference to the drawings.

1 is a plan view of a composite melting furnace apparatus according to an embodiment of the present invention. Fig. 2 is a sectional view of the apparatus of Fig. 1 viewed from the front, and Fig. 3 is a sectional view of the apparatus of Fig. 1 seen from one side.

The composite melting furnace system (1) according to the present invention is composed of two melting furnaces. As shown in the figure, the composite melting furnace apparatus 1 includes a first melting furnace unit 100 at the upper portion and a second melting furnace unit 200 at the lower portion.

The first melting furnace unit 100 is a low-temperature melting furnace that heats materials inside the first melting space 120 by induction coils to vitrify them. The bottom portion of the first melting furnace unit 100 is formed in an inclined bottom portion shape. Two outlets are formed in the inclined bottom portion, and a first outlet (140) for discharging the upper melt from the upper portion of the inclined bottom portion to the outside of the apparatus, a lower melt and a non- To the second melting space (220) of the second melting furnace unit (200).

The first outlet 140 is opened and closed by a shut-off bar 150 driven up and down to discharge the melt. The shut-off bar 150 is driven by a shut-off bar driving device above the low-temperature melting furnace, and periodically opens and closes the first outlet 140 during operation to discharge the melted material (slag) to the outside of the apparatus. The melted material discharged through the first outlet 140 constitutes the apparatus to be charged directly into the slag drum 600. When the slag drum 600 is directly charged, there is an advantage that post-treatment after melting of the hazardous waste becomes easier.

The second melting furnace unit (200) is located below the first melting furnace unit (100). It is preferable that the first melting furnace unit 100 is positioned at the upper end of the second melting furnace unit 200 as shown in FIG. However, in another embodiment, the first melting furnace unit 100 may be located on the side of the second melting furnace unit 200, but the lower end of the first melting furnace 120 is created during operation of the second melting furnace unit 200 The first melting furnace unit 100 may be formed to be higher than the maximum height of the melts so that the first melting furnace unit 100 is located at a relatively higher position than the second melting furnace unit 200. In other words, it is also possible that the melt of the first melting furnace unit 100 is located on the side of the structural surface that is movable into the second melting space 220 of the second melting furnace unit 200.

The second melting furnace unit 200 is a plasma melting furnace for heating and melting the waste by the plasma torch 210. Plasma melting furnaces are advantageous in that both flammable wastes and non-combustible wastes can be slagged, but it is difficult to treat liquid wastes. In general, when a liquid waste is to be treated with a plasma melting furnace, pre-treatment such as drying or incineration is necessary. However, in the present invention, because the liquid waste can be treated through the first melting furnace unit 100, almost all kinds of waste treatment can be performed by one apparatus.

The second melting furnace unit 200 has two outlets for separating and discharging slag and metal by density difference. Due to the difference in specific gravity, the heavy metal melt is located at the bottom and the slag with a relatively small specific gravity is located at the top of the melt. Therefore, the second outlet 230 for discharging the slag is formed in the side surface of the second melting space 220 of the second melting furnace unit 200. It is preferable that the second outlet 230 is formed at 5 to 50% of the height of the side surface of the second melting space 220 so that the upper material of the melt generated during the operation of the second melting furnace unit 200 can be discharged. The third outlet 240 is formed at the bottom of the second melting space 220 to discharge the entire amount of the melt including the discharge of the metal melt. Separately discharging the metal melt is for the purpose of easily extracting and recycling precious metals, etc., in order to prepare for the case where the disposal method is changed according to the kind of the material.

In the present invention, as shown in the drawing, the drum inlet 500 is formed so that the waste drum 400 containing the hazardous waste can be directly introduced into the second melting furnace unit 200. In the case of medium-low-level radioactive waste, it is common to store it in a drum and to be stored and transported. When this drum is directly melted without opening or closing it, the possibility of exposure of the radioactive waste to the surrounding environment is reduced and efficient treatment becomes possible.

The second melting furnace unit 200 has a drum charging device capable of automatically charging the waste drum 500. As shown in FIG. 3, the waste drum 400 is in a standby state at the entrance of the drum inlet 500 along an inclined gradient and is rotated by the drum conveying motor 320, the drum transferring cylinder 350, 330 and the second closing door 340 are sequentially interlocked and charged into the second melting space 220 in sequence. When the second hermetically closed door 340 is opened, the drum transfer cylinder 350 pushes one of the waste drums 400 in. When the second hermetically closed door 340 is closed, the first hermetically closed door 330 is opened and the drum conveying motor 320 is rotated to operate the drum conveying device 310 to transfer one waste drum 400 to the drum inlet 500 do.

The loaded waste drum 400 is initially slid in the state of being laid down in the drum loading port 500 and is transferred and melted. In some cases, however, the drum is transferred to a standing state and melted.

The first melting furnace unit 100, which is a low-temperature melting furnace, is disposed such that there is no interference during the operation and maintenance of the plasma torch of the second melting furnace unit 200.

The waste of the first melting furnace unit 100 is injected through the first inlet 110 formed in the upper part as shown in the figure. In addition to the drum inlet 500, the second melting furnace unit 200 has a second inlet 250 formed in the upper portion of the second melting space 220 so that waste other than the drum-type waste can be introduced.

The drum inlet 500 is closed by the first and second closing doors 330 and 340 and the drum inlet 500 is maintained at a negative pressure in order to further block the harmful gas So that the leakage of harmful gas can be prevented in advance.

The first melting furnace unit 100 and the second melting furnace unit 200 according to the present invention can be operated independently according to the amount and type of waste, and can be efficiently processed regardless of the type of hazardous waste through simultaneous operation Do.

The above-described embodiments are illustrative of the present invention, and the present invention is not limited thereto. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims (10)

A composite melting furnace device for treating hazardous wastes,
A first melting furnace unit for forming a melt by an induction coil,
A second melting furnace unit for forming a melt by the plasma torch, and
And an inner discharge port formed in the melted space of the first melter unit to communicate with the melted space of the second melter unit so that the melt can move,
Wherein the first furnace unit includes a bottom sloped bottom portion,
And a first outlet for discharging at least a part of the melt to the outside of the composite melting furnace is formed in the upper portion of the inclined bottom portion. delete The method of claim 1,
And the inner discharge port is formed at a lower portion of the inclined bottom portion of the first melting furnace unit. The method of claim 1,
Wherein the first melting furnace unit includes an outlet shut-off rod for opening and closing the first outlet. The method of claim 1,
Wherein the second melting furnace unit comprises:
A second outlet formed to communicate with at least a part of the side surface of the melting space,
And a third outlet formed to communicate with a bottom portion of the melting space. The method of claim 1,
And the inner discharge port of the first melting furnace unit is formed so as to communicate with a ceiling portion of the melting chamber of the second melting furnace unit. The method of claim 1,
Wherein the second melting furnace unit includes a drum loading port for introducing the drum into the melting space. 8. The method of claim 7,
The second melting furnace unit further comprises a drum charging device for charging a drum into the drum charging port,
Wherein the drum introducing device is formed to include at least one of a drum transferring device and a drum transferring cylinder. 8. The method of claim 7,
Characterized in that the drum inlet comprises at least one tea closing door. The method of claim 1,
And a second inlet for injecting waste into at least a part of the upper portion of the second melting furnace unit.
KR1020150098077A 2015-07-10 2015-07-10 Combined melting device for vitrification KR101606174B1 (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004069219A (en) * 2002-08-08 2004-03-04 Nippon Steel Corp Waste melting treatment furnace

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004069219A (en) * 2002-08-08 2004-03-04 Nippon Steel Corp Waste melting treatment furnace

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