KR20220111841A - Slurry supplying apparatus of the vitrification process facility - Google Patents

Abstract

Provided is a slurry supplying apparatus of a vitrification process facility. The slurry supplying apparatus may include: a melt storage unit in which a melting furnace is seated and a melt discharged from the melting furnace is filled; and a waste supply unit installed to supply waste to the inside of the melting furnace via the melt storage unit.

Description

Waste supply apparatus of the vitrification facility

The present invention relates to a waste supply device for a vitrification plant.

It is necessary to more stably process, store and manage radioactive waste from nuclear power generation. Among the methods of processing and storing hazardous waste, low-temperature melting furnace vitrification technology has been developed. The low-temperature melting furnace vitrification technology uses an induction heating low-temperature melting furnace to burn hazardous wastes, melt heavy metals to form a solidified glass together with glass, and trap them in the glass structure to prevent leaching into the surrounding environment and isolate them.

등)에 의해 급격한 기화로 대량의 퓸(Fume) 발생, 용융로 내부 부압 상실 및 후단 필터 차압 상승 발생하게 되는 현상이 발생된다.During the operation of the vitrification facility for vitrification, waste (flammable solids, slurry, etc.) is put into the upper part of the melt through the waste supply pipe installed on the upper part of the low-temperature melting furnace and subjected to thermal decomposition. At this time, when liquid sludge waste is input, the surface temperature of the melt (e.g., about 1,150

etc.), a large amount of fume is generated due to rapid vaporization, the negative pressure inside the melting furnace is lost, and the differential pressure of the downstream filter is increased.

Korean Patent Publication No. 10-2016-0040239

The problem to be solved by the present invention is to prevent the generation of positive pressure inside the melting furnace due to rapid moisture evaporation when fluid containing sludge on the low-temperature melting furnace of the vitrification facility is introduced and the rise in the differential pressure of the downstream filter, thereby prolonging the life of the low-temperature melting furnace and the filter. to provide the device.

Another object of the present invention is to provide a waste supply device for a vitrification facility in which the amount of melt processing of fume generated during thermal decomposition is increased by supplying a slurry to the inside of the high-temperature molten glass.

In addition, it is to provide a waste supply device of a vitrification facility capable of preventing clogging of the nozzle of the waste supply pipe by simultaneously supplying oxygen and slurry, and ensuring homogeneity of the melt by optimizing the mixing of the injected slurry and the melt.

In addition, it is to provide a waste supply device of a vitrification facility that can minimize the generation of fume due to the input of the melt and minimize the clogging of the exhaust treatment system pipe, thereby shortening the cycle of preventive maintenance.

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 waste supply apparatus of a vitrification facility according to an aspect of the present invention for achieving the above object includes a melt storage unit in which a melting furnace is seated and the melt discharged from the melting furnace is filled therein; and a waste supply unit installed to supply waste into the melting furnace via the melt storage unit.

In addition, the waste supply unit is inserted from the lower part of the melt storage unit to the upper part, and may include an insert for supplying a fluid into the melting furnace.

In addition, the insert may supply a fluid to at least the central portion of the melting furnace.

In addition, the waste supply unit, installed at the lower portion to communicate with the insert, may include a waste input for supplying waste to the insert.

In addition, the waste supply unit may include a cooling water injection unit for injecting cooling water into the insert, and a cooling water discharge unit for discharging the injected cooling water, installed at a lower portion to communicate with the insert.

Also, the waste supply unit may include an oxygen supply unit installed at a lower portion to communicate with the insert and supply oxygen to the insert.

In addition, the waste supply unit is installed at a lower portion to communicate with the insert, and includes a cooling water inlet into which cooling water is injected into the insert, and a cooling water outlet for discharging the cooling water, the cooling water inlet and the cooling water. Through the discharge part, the insert may have a cooling circulation therein.

In addition, the waste supply unit is installed in the lower part so as to communicate with the insert, and a waste input part for supplying waste to the insert, and is installed at the lower part to communicate with the insert, and supplies oxygen to the insert. Including an oxygen supply unit for doing so, the waste and the oxygen may be complexly supplied to the insert.

In addition, the waste supply unit may include a stainless steel material.

In addition, the melt storage unit, the body filled with the melt, is provided on the upper portion of the body, is provided with a seating portion on which the melting furnace is seated, the seating portion is provided with an injection hole communicating with the inside of the melting furnace on the seating surface, and , by injecting a gas into the melting furnace through the injection hole, it may be to accelerate the discharge of the melt inside the melting furnace.

In addition, the gas may include at least one of nitrogen and oxygen.

In addition, the seating portion, as a piece (片)-shaped body, provided with a plurality of adjacent to each other in the circumferential direction, at least a portion may be provided so as to be inclined from the top to the bottom.

In addition, the melt storage unit is made of a metal material in which a hole is formed in the lower portion, and the hole is filled with a filling material to be closed, and the filling material may include a castable refractory.

In addition, the melt storage unit may be provided with a closing body that at least partially covers the upper portion of the through hole.

According to the waste supply device 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 extend the life of the low-temperature melting furnace and the filter by preventing the generation of positive pressure inside the melting furnace due to rapid moisture evaporation when fluid containing sludge on the low-temperature melting furnace of the vitrification facility is introduced and the rise in the differential pressure of the downstream filter.

In addition, it is possible to increase the melt throughput of fume generated during thermal decomposition by supplying the slurry to the inside of the high-temperature molten glass of the melting furnace.

In addition, the simultaneous supply of oxygen and slurry prevents clogging of the nozzle of the waste supply pipe, and it is possible to secure the homogeneity of the melt by optimizing the mixing of the injected slurry and the melt.

In addition, it is possible to reduce the cycle of preventive maintenance by minimizing the generation of fume due to the input of the melt and minimizing the clogging of the exhaust treatment system piping.

1 is a view showing a waste supply device of a vitrification facility according to an embodiment of the present invention.
FIG. 2 is a view showing the melt storage unit according to FIG. 1 .
FIG. 3 is a view showing the waste supply unit according to FIG. 1 .
Figure 4 is a view showing an embodiment of the melting furnace is seated in the waste supply device of the vitrification facility according to Figure 1 .

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 for 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 specifically defined explicitly.

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 view showing a waste supply device of a vitrification facility according to an embodiment of the present invention. FIG. 2 is a view showing the melt storage unit according to FIG. 1 . FIG. 3 is a view showing the waste supply unit according to FIG. 1 .

Referring to FIG. 1 , the waste supply device (hereinafter referred to as “waste supply device”) of the vitrification facility according to an embodiment of the present invention may include a melt storage unit 200 and a waste supply unit 300 . can The waste supply unit 300 may include an insert 310 .

1 and 2 , in the melt storage unit 200 of the waste supply device, the melting furnace 100 is seated, and the melt discharged from the melting furnace 100 may be filled therein.

1 and 3 , the waste supply unit 300 of the waste supply device may be installed to supply waste into the melting furnace 100 via the melt storage unit 200 .

Referring to FIG. 1 , the insert 310 of the waste supply unit 300 is inserted from the lower part to the upper part of the melt storage unit 200 , and may supply a fluid into the melting furnace 100 .

The body 210 of the melt storage unit 200 may be filled with the melt to a set capacity. The seating portion 220 of the melt storage unit 200 is provided on the upper portion of the body 210, so that the melting furnace 100 is seated.

The seating portion 220 of the melt storage unit 200 may have an injection hole communicating with the inside of the melting furnace 100 on the seating surface. The gas is injected into the melting furnace 100 through the injection hole, and there is an effect that can accelerate the discharge of the melt inside the melting furnace 100 .

Here, the gas may include at least one of nitrogen and oxygen. The seating portion 220 of the melt storage unit 200 is a piece-shaped body, and may be provided in plurality along the circumferential direction adjacent to each other,

At least a portion of the seating part 220 may be inclined from the top to the bottom. On the other hand, the melt storage unit 200 is made of a metal material in which a through hole (H1) is formed in the lower portion, and the through hole may be closed with a filler.

Here, the filler may include a castable (castable refractory). The melt storage unit 200 may be provided with a finishing body that at least partially covers the upper portion of the through hole H1.

This castable is for improving thermal efficiency, for example, in comparison with the case where the melt storage unit 200 is provided only with metal, the castable is provided as described above, so that the thermal efficiency is higher than that of the melt storage unit 200. There is an effect of improving the thermal efficiency to have a lot of heat in the melt.

The insert 310 of the waste supply unit 300 may supply a fluid to at least the central portion of the melting furnace 100 . The waste input unit 320 of the waste supply unit 300 is installed at the lower portion to communicate with the insert 310 . Waste may be supplied to the insert 310 through the waste input unit 320 .

The cooling water injection part 331 of the waste supply unit 300 is installed at the lower part to communicate with the insert 310 , and is for injecting the coolant into the insert 310 .

The cooling water discharge unit 332 of the waste supply unit 300 is for discharging the cooling water injected into the insert 310 through the cooling water injection unit 331 .

The oxygen supply unit 340 of the waste supply unit 300 may be installed at a lower portion to communicate with the insert 310 to supply oxygen to the insert 310 . Here, the waste supply unit 300 may be provided to include a stainless steel material.

On the other hand, although it is possible that the waste and oxygen are separately supplied to the insert 310, it is preferable to be supplied in combination. This is because the simultaneous supply of oxygen and slurry prevents clogging of the nozzle of the waste supply pipe, and it is possible to secure the homogeneity of the melt by optimizing the mixing of the injected slurry and the melt.

FIG. 4 is a view showing an embodiment of a melting furnace that is seated in the waste supply device of the vitrification facility according to FIG. 1 .

Referring to FIG. 4 , the 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 in which the inputted waste is accommodated, melted and discharged. The lower chamber 120 may be provided as a metal sector.

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 .

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.

100: melting furnace
200: melt storage unit
300: waste supply unit
310: insert
331: coolant injection unit
332: cooling water discharge unit
340: oxygen supply unit
H1: through hole

Claims (10)

a melt storage unit in which the melting furnace is seated and the melt discharged from the melting furnace is filled therein; and
Via the melt storage unit, including a waste supply unit installed to supply waste to the inside of the melting furnace, the waste supply device of the vitrification facility. According to claim 1,
The waste supply unit,
Inserted from the bottom to the top of the melt storage unit, including an insert for supplying a fluid into the melting furnace, a vitrification facility waste supply device. 3. The method of claim 2,
wherein the insert supplies fluid to at least the center of the furnace. 3. The method of claim 2,
The waste supply unit,
Installed at the lower portion so as to communicate with the insert, including a waste input unit for supplying waste to the insert, a vitrification facility waste supply device. 3. The method of claim 2,
The waste supply unit,
a cooling water injection unit installed at a lower portion to communicate with the insert and into which cooling water is injected; and a cooling water discharge unit for discharging the cooling water;
Through the cooling water injection unit and the cooling water discharge unit, the cooling circulation is made inside the insert, a vitrification facility waste supply device. 3. The method of claim 2,
The waste supply unit,
Installed at the lower portion so as to communicate with the insert, including an oxygen supply unit for supplying oxygen to the insert, vitrification facility waste supply device. 3. The method of claim 2,
The waste supply unit,
a waste input unit installed at the lower portion to communicate with the insert, and for supplying waste to the insert;
It is installed at the lower portion so as to communicate with the insert, including an oxygen supply unit for supplying oxygen to the insert,
The waste and the oxygen will be supplied in combination to the insert, vitrification plant waste supply device. 3. The method of claim 2,
The waste supply unit will include a stainless steel material, vitrification facility waste supply device. According to claim 1,
The melt storage unit,
a body filled with the melt;
It is provided on the upper part of the body, and a seating part on which the melting furnace is seated is provided,
The seating portion is formed with an injection hole communicating with the inside of the melting furnace on the seating surface,
By injecting a gas into the melting furnace through the injection hole, the waste supply device to accelerate the discharge of the melt inside the melting furnace. 10. The method of claim 9,
The gas will include at least one of nitrogen and oxygen, a waste supply device.

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