KR20220111842A - Vitrification cold crucible and installing method thereof - Google Patents

Abstract

Provided are a vitrification cold crucible and an installing method thereof. The vitrification cold crucible may include a plurality of sectors arranged in the circumferential direction to form a melting space of the crucible; and an insulating medium made of alumina positioned between the sectors. According to the present invention, it is possible to prevent arcing and insulation material damage due to inflow of foreign substances.

Description

Low-temperature melting furnace of vitrification facility and its installation method

The present invention relates to a low-temperature melting furnace of a vitrification facility and a method for installing the same.

It is necessary to more stably process, store and manage radioactive waste from nuclear power generation. Low-temperature melting furnace vitrification technology has been developed as a method of processing and storing hazardous waste.

Low-temperature melting furnace vitrification technology uses an induction heating-type low-temperature melting furnace to burn hazardous waste, melt heavy metals to form a solidified glass together with glass, and isolate it by locking it in the glass structure so that it does not leach into the surrounding environment.

Here, in the low-temperature melting furnace of the vitrification facility, when the insulating means is joined to the mica plate between the sectors, arcing occurs when foreign substances are introduced into the low-temperature melting furnace, thereby causing damage to the mica plate.

In addition, if the mica plate is damaged, the melt may penetrate between the sectors, and if this process is repeated, there is a problem that may adversely affect the stability of the low-temperature melting furnace.

In addition, since the conventional sector and the sector are strongly coupled with a mica plate, there is a problem in that it is difficult to replace and maintain the mica plate.

Korea Patent Publication No. 10-2012-0065668

The problem to be solved by the present invention is to improve the insulating material required for inter-sector bonding of the low-temperature melting furnace, thereby solving the problems such as breakage of insulating material and external leakage of melt and gas caused by using the existing mica plate insulating material at low temperature of a vitrification facility. To provide a melting furnace.

In addition, it is an object to provide a low-temperature melting furnace for a vitrification facility capable of securing the health of metal sectors by preventing arcing between metal sectors due to induction heating.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

A low-temperature melting furnace of a vitrification facility according to an aspect of the present invention for achieving the above object, a plurality of sectors arranged in a circumferential direction to form a melting space of the melting furnace; and an alumina insulating medium positioned between the sectors.

In addition, the insulating medium is provided as a board-type alumina board, and may be press-closed based on the bond between the sectors so that the inside of the melting furnace is blocked from the outside.

In addition, the insulating medium may be provided with an area corresponding to the neighboring sectors.

In addition, the sector may have at least one pair of water cooling lines that communicate with each other adjacent to each other in the height direction for cooling circulation.

In addition, the alumina board may have a heat resistance of 1200 to 1800°C.

A method for installing a low-temperature melting furnace of a vitrification facility according to an aspect of the present invention for achieving the above object includes: arranging a plurality of sectors in a circumferential direction with an insulating medium therebetween; and binding the arranged sectors to be pressed in close contact with each other in a circumferential direction, wherein the insulating medium may include an alumina material.

According to the low-temperature melting furnace and the installation method of the vitrification facility of the present invention as described above, there are one or more of the following effects.

According to the present invention, it is possible to provide a low-temperature melting furnace for a vitrification facility that can prevent arcing and damage to the insulation material due to the inflow of foreign substances that occur when using an existing insulation material (eg, mica plate) by improving the insulation material required for inter-sector bonding of the low-temperature melting furnace. can

In addition, it is possible to provide a low-temperature melting furnace for a vitrification facility capable of securing the health of metal sectors by preventing arcing between metal sectors due to induction heating.

1 is a perspective view showing a low-temperature melting furnace according to an embodiment of the present invention.
2 is a perspective view illustrating a lower chamber according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view of the configuration taken along line A-A' in FIG. 2 .
Figure 4 is a schematic diagram showing a state inside the melting furnace according to an embodiment of the present invention.
5 is a schematic diagram illustrating a melt flow state inside a melting furnace 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. Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments published below, but may be implemented in various different forms, and only these embodiments allow the publication of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains. It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Spatially relative terms "below", "beneath", "lower", "above", "upper", etc. It can be used to easily describe the correlation between an element or components and other elements or components. Spatially relative terms should be understood as terms including different orientations of the device during use or operation in addition to the orientation shown in the drawings. For example, when an element shown in the figures is turned over, an element described as "beneath" or "beneath" another element may be placed "above" the other element. Accordingly, the exemplary term “below” may include both directions below and above. The device may also be oriented in other orientations, and thus spatially relative terms may be interpreted according to orientation.

Although first, second, etc. are used to describe various elements, components, and/or sections, it should be understood that these elements, components, and/or sections are not limited by these terms. These terms are only used to distinguish one element, component, or sections from another. Accordingly, it goes without saying that the first element, the first element, or the first section mentioned below may be the second element, the second element, or the second section within the spirit of the present invention.

The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. In this specification, the singular also includes the plural, unless specifically stated otherwise in the phrase. As used herein, “comprises” and/or “comprising” refers to the presence of one or more other components, steps, operations and/or elements mentioned. or addition is not excluded.

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not to be interpreted ideally or excessively unless clearly defined in particular.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, and in the description with reference to the accompanying drawings, the same or corresponding components are given the same reference numbers regardless of the reference numerals and overlapped therewith. A description will be omitted.

1 is a diagram showing the configuration of a substrate processing apparatus according to an embodiment of the present invention.

Referring to Figure 1, the low-temperature melting furnace of the vitrification facility according to an embodiment of the present invention is shown. The low-temperature melting furnace may include an upper chamber 110 , an inlet 111 , an exhaust outlet 112 , a lower chamber 120 , an outlet 130 , and an induction coil 140 .

The upper chamber 110 is provided with a waste inlet 111 into which a molten material such as radioactive waste, general industrial waste, ceramic material, and metal material is put and an exhaust outlet 112 through which exhaust gas generated in the melting process is discharged. can

It is connected to the lower side of the upper chamber 110 through the joint 105 and consists of a lower chamber 120 in which the input waste is accommodated, melted and discharged. The lower chamber 120 may be provided as a sector 121 including a metal material.

The lower chamber 120 may be provided with an inclined water-cooled bottom plate 150 at a lower portion. In addition, a melt discharge unit 130 through which the melt is discharged may be provided under the water-cooled bottom plate 150 .

When a high-frequency current is applied to the inclined horizontal induction coil 140 , the generated induced current is transferred to the waste inside the lower chamber 120 to heat and melt the waste.

FIG. 2 is a view showing the lower chamber according to FIG. 1 .

Referring to FIG. 2 , the lower chamber 120 may include a sector 121 and an insulating medium 122 . Here, a plurality of sectors 121 of the lower chamber 120 may be provided to form a melting space of the melting furnace.

It is preferable that a plurality of such sectors 121 are arranged along the circumferential direction to form a cylindrical shape. The insulating medium 122 may be respectively positioned between the plurality of sectors 121 aggregates disposed in the circumferential direction.

의 온도를 가지기 때문에 , 통상 약500

내열성을 가지는 운모판과 같은 절연체로서는 용융물에 대응하는 절연, 내구성 등을 충족시킬 수 없다.The melt is usually about 1150

Because it has a temperature of , usually about 500

An insulator such as a mica plate having heat resistance cannot satisfy the insulation and durability corresponding to the melt.

O₃)재질로서 구비된다. 이러한 절연매개체(122)는 알루미나보드는 내열성이 1200 내지 1800

인 것일 수 있다. 바람직하게는 약 1600

의 내열성을 가질 수 있다.For this reason, reliability and stability may be deteriorated in preventing external leakage of high-temperature melt and gas. However, the insulating medium 122 according to the present invention is alumina (Al

O₃) as a material. The insulating medium 122 is an alumina board having heat resistance of 1200 to 1800.

may be preferably about 1600

of heat resistance.

Therefore, it goes without saying that the effect of stably preventing external leakage of high-temperature melt and gas generated inside the melting furnace can be derived. Such an insulating medium 122 may be preferably provided with, for example, a board-type alumina board.

FIG. 3 is a cross-sectional view of the configuration taken along line A-A' in FIG. 2 .

Referring to FIG. 3 , the insulating medium 122 may be pressed into tight contact with the sectors 121 based on mutual bonding so that the inside of the melting furnace is blocked from the outside. That is, a plurality of insulating media 122 are disposed between the sectors 121 , and are pressed between the sectors 121 through a physical binding force by the binding structure of the sectors 121 , and between the sectors 121 . It may be provided to fill the space.

The sector 121 may be provided in the lower chamber 120 of the melting furnace as described above. In addition, the insulating medium 122 may be provided with an area or thickness corresponding to the neighboring sectors 121 .

Meanwhile, in the sector 121 , water cooling lines 1211 and 1212 may be built-in in the height direction. A plurality of such water cooling lines 1211 and 1212 may be provided in pairs adjacent to each other.

Here, any one of the first water cooling lines 1211 may be a line through which cooling water is introduced and flows. And the other second water cooling line 1212 may be a line through which the cooling water flows so as to be discharged.

Accordingly, each sector 121 may perform cooling of a contact object such as a melt through the cooling water circulation structure through the first water cooling line 1211 and the second water cooling line 1212 .

Figure 4 is a schematic diagram showing a state inside the melting furnace according to an embodiment of the present invention.

5 is a schematic diagram illustrating a melt flow state inside a melting furnace according to an embodiment of the present invention.

Referring to FIG. 4 , the molten material M1 in the melting furnace 121a may exist without waves or in a calm state. On the other hand, referring to FIG. 5 , the melt M1 in the melting furnace 121a is formed by an internal factor (eg, internal pressure, gas, heat, etc.) or an external factor (eg, impact, vibration, etc.) of the melt M1. A wave M2 may be generated.

As the wave is generated in the melt (M1) inside the melting furnace, the water level, intensity, frequency of occurrence, etc. of the wave (M2) becomes stronger in a state where the water level of the melt is increased as shown in FIG. 5 .

In particular, the insulating medium 122 of the inner wall is continuously and repeatedly hit by the wave M2 of the swirling shape of the melt M1. In this case, the durability of the general mica plate is lowered according to the contact of the melt, which may lead to leakage of the melt (M1), gas, and the like.

However, the insulating medium 122, which is an alumina board, has the durability to sufficiently withstand continuous and repeated contact according to the wave M2 of the melt M1. Therefore, there is an effect that the stability and reliability for preventing external leakage of the melt (M1), gas, etc. can be guaranteed.

Although the embodiments of the present invention have been described with reference to the above and the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can implement the present invention in other specific forms without changing the technical spirit or essential features. You will understand that there is Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

110: upper chamber
111: inlet
112: exhaust outlet
120: lower chamber
121: sector
121a: inside the melting furnace
1211: first water cooling line
1212: second water cooling line
130: outlet
140: induction coil
150: water cooling bottom plate
M1: melt
M2: wave

Claims (4)

A plurality of sectors arranged in the circumferential direction to form a melting space of the melting furnace; and
A low-temperature melting furnace of a vitrification facility comprising an alumina insulating medium positioned between the sectors. According to claim 1,
The insulating medium is provided as a board-type alumina board, and is press-closed based on the bond between the sectors so that the inside of the melting furnace is blocked from the outside, a low-temperature melting furnace of a vitrification facility. According to claim 1,
The low-temperature melting furnace of the vitrification facility, wherein the insulating medium is provided with an area corresponding to the neighboring sectors. disposing a plurality of sectors in a circumferential direction with an insulating medium interposed therebetween; and
Including the step of binding the arranged sectors so as to be pressed in close contact with each other in the circumferential direction,
The insulating medium is a low-temperature melting furnace installation method of a glass refining facility, including an alumina material.

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