KR102407867B1 - Apparatus for decontaminating radioactive ash - Google Patents

Abstract

To be able to decontaminate the incineration ash without generating dust, a mixer for mixing radioactive incineration ash and washing water is included, wherein the mixer is a mixing tank in which washing water is accommodated and incinerated ash and washing water are mixed, provided inside the mixing tank Provides a radioactive incinerator decontamination device comprising a holder for supporting the sack filled with washing water, and a cutter installed on the cradle to tear and open the lower end of the sack.

Description

Radioactive incinerator decontamination apparatus {APPARATUS FOR DECONTAMINATING RADIOACTIVE ASH}

The present disclosure relates to a radioactive incinerator decontamination apparatus.

In general, radioactive waste generated during the operation of a nuclear power plant or nuclear-related facility is stored and managed in a management facility such as a radioactive waste repository.

Since it takes a lot of money to construct the radioactive waste repository and store the radioactive waste, it is a burden in reality.

Accordingly, a method of reducing the amount of radioactive waste by burning and disposing of radioactive waste using an incinerator is being used. However, since radioactive waste incineration also generates radioactively contaminated incineration ashes, there is a problem with the treatment of radioactively contaminated incinerated ashes.

Decontamination of radioactive incineration ash is processed through the process of collecting and purifying cesium-contaminated water through solid-liquid separation after putting incinerated ash into washing water, mixing solid-liquid, and eluting cesium.

However, in the conventional case, there is a problem in that a large amount of dust is generated in the process of processing the incinerated ash. Secondary pollution is caused by radioactive dust generated from incineration ash, and if a worker is absorbed into the human body through breathing, personal injury may occur.

The objective of this task is to provide a radioactive incinerator decontamination device capable of discharging incineration ash into washing water without generating dust from the bag.

The present task is to provide a radioactive incinerator decontamination device that allows the incineration ash to be more effectively mixed with the washing water without agglomeration.

The present task is to provide a radioactive incinerator decontamination device that can effectively discharge incineration ash from the bag even in the washing water.

The present task is to provide a radioactive incinerator decontamination device that can effectively remove the washing water on the sack.

The decontamination apparatus of this embodiment may include a mixer for mixing radioactive incineration ash and washing water.

The mixer is a mixing tank in which washing water is received and mixing of incineration ash and washing water is made, a holder provided inside the mixing tank to support a sack filled with radioactive incineration ash in a state of being submerged in washing water, and installed on the cradle to tear the bottom of the sack open It may include a cutter that does.

It may further include a through shaft installed on the cradle to fix the sack.

The through shaft may be installed on the cradle, protrude upward, cut the sack when the sack is lowered, and be inserted therein to fix the sack.

The through shaft is a vertically erected plate structure, and may have a structure forming a triangular shape that is pointed toward the tip.

The through shaft may be a plate structure in the form of a right-angled triangle, four of which are arranged at an angle of 90 degrees, and the vertical sides are in contact with each other and are arranged in a cross shape.

The cradle may include a plurality of horizontal frames extending in the lateral direction and arranged at an angle along the circumferential direction.

The horizontal frame may be arranged at an angle of 90 degrees from the center of the cradle to form a cross shape.

The cutter is installed on a rail extending outwardly from the center of the holder, a transfer block moving along the rail, a driving unit for moving the transfer block, and the transfer block and cuts the sack according to the movement of the transfer block. It may include a blade that

The cutter may further include a clamping bar installed on the transfer block and extending above the blade to spread and fix the lower end of the cut bag in a cut state.

The clamping bar may extend upward past the lower end of the through shaft, and the side end may be formed in a sawtooth shape. The two clamping bars may form a pair and may be disposed on both sides of the through shaft with the through shaft interposed therebetween.

The rail may extend in the arrangement direction of the through shaft, and the blade may be positioned below the through axis to cut the sack while moving along the arrangement direction of the through axis.

Four of the cutters may be arranged at a 90 degree angle to cut the sack in a cross shape.

The clamping bar may have a structure in which two clamping bars form a pair and are disposed on both sides of the through axis with the through axis interposed therebetween to move along the through axis.

The mixer may further include a circulation unit installed at the bottom of the mixing tank and mixing the incineration ash and the washing water by jetting washing water into the mixing tank.

The circulation unit is connected to at least one or more spray nozzles installed at intervals on the bottom of the mixing tank, at least one washing water chamber installed under the mixing tank and connected to the jet nozzle and receiving washing water therein, and the washing water chamber. It may include a washing water supply unit for supplying the washing water to spray the washing water through the spray nozzle.

The circulation unit may further include a cover that is installed on the upper end of the spray nozzle and the lower end is bent toward the bottom of the mixing tank, and guides the spraying direction of the washing water downward as a whole.

The mixer may further include a spray unit installed inside the mixing tank to prevent incineration ash from accumulating on the bottom of the mixing tank under the holder.

The spray unit may include an injection port installed on one side of the mixing tank to eject washing water to the bottom of the mixing tank under the holder, and a washing water supply unit installed at the injection port to supply washing water.

It may further include a washing unit for washing the incineration ash remaining in the bag.

The washing unit may include at least one inner injection nozzle installed on the cradle and injecting washing water into the sack through the cut-out lower part of the sack, and a washing water supply unit connected to the inner injection nozzle to supply washing water.

The washing unit may further include a ring-shaped pipe disposed around the sack at the upper inner side of the mixing tank and connected to the washing water supply unit, and an outer injection nozzle installed along the pipe to spray washing water on the outer surface of the sack. .

It may further include a water removal unit for removing water from the bag in which the incineration ash is discharged.

The water removal unit includes a pair of wiping rolls respectively installed at the ends of a pair of doors that open and close the upper inlet of the mixing tank and come into contact with each other while the door is closed when the entrance is closed. It may have a structure in which the washing water attached to the sack is removed by being pressed between the wiping rolls.

The water removal unit may further include a pair of guide rolls disposed in a direction perpendicular to the wiping roll at both ends of the wiping roll.

As described above, according to this embodiment, the bag filled with incineration ash is opened in a state in which the bag is put into the washing water inside the mixing tank, so that the generation of dust can be fundamentally blocked.

In addition, by spraying the washing water onto the surface of the bag, it is possible to prevent the dust attached to the surface of the bag from scattering during the bag insertion process or the cutting process.

Accordingly, it is possible to minimize pollution or damage to human life due to dust generation.

The bag can be opened quickly and effectively, increasing the mixing effect with the washing water.

Even under an environment in which the stirrer cannot be used because the water level inside the mixing tank continuously fluctuates, through the mixing structure through the circulation of the washing water inside the mixing tank, the powdered incineration ash can be mixed more effectively with the washing water without agglomeration.

It is possible to prevent the incineration ash discharged from the bag from accumulating on the bottom of the mixing tank under the holder.

Accordingly, it is possible to increase the mixing effect of the incineration ash.

The incineration ashes can be completely discharged from the bag as washing water, so that the incineration ashes can be prevented from remaining in the bag.

By removing the washing water from the surface of the sack in the process of withdrawing the sack from the mixing tank, it is possible to prevent secondary contamination by the washing water when moving the sack.

1 is a schematic side view showing the configuration of a mixer of the radioactive incineration ash decontamination apparatus according to the present embodiment.
Figure 2 is a schematic plan view showing the configuration of the mixer of the radioactive incineration ash decontamination apparatus according to the present embodiment.
3 is a schematic view showing a cutter of the mixer according to the present embodiment.
4 and 5 are schematic views for explaining the operation of the cutter according to the present embodiment.
6 is a schematic diagram illustrating a washing unit according to the present embodiment.
7 is a schematic diagram illustrating a washing water supply unit according to the present embodiment.

Hereinafter, embodiments of the present invention will be described in detail. However, this is provided as an example, and the present invention is not limited thereto, and the present invention is only defined by the scope of the claims to be described later. The embodiments to be described below may be modified in various forms without departing from the concept and scope of the present invention. Wherever possible, identical or similar parts are denoted by the same reference numerals in the drawings.

The terminology used below is for the purpose of referring to specific embodiments only, 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. The meaning of "comprising," as used herein, specifies a particular characteristic, region, integer, step, operation, element and/or component, and other specific characteristic, region, integer, step, operation, element, component, and/or group. It does not exclude the existence or addition of

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. However, the following examples are only preferred examples of the present invention, and the present invention is not limited thereto.

1 and 2 show the mixer of the radioactive incineration ash decontamination apparatus according to this embodiment, and Figures 3 and 4 show the cutter structure of the mixer according to this embodiment.

The incineration ash desalination apparatus of this embodiment may include a mixer 10 for mixing the incineration ash and the washing water to elute and process cesium from the radioactive incinerator.

The radioactive incinerator is, for example, contained in a sack 100 such as a flexible container bag, transferred to the mixer 10, is put into the mixer 10, and is mixed with washing water.

The mixer 10 of this embodiment may have a structure in which the sack 100 containing the incineration ash is opened from the inside of the washing water of the mixer 10 and the incineration ash is put into the mixer 10 . Accordingly, it is possible to prevent the generation of dust in the process of putting the incineration ash into the mixer (10).

To this end, the mixer 10 is provided in the mixing tank 20 and the mixing tank 20 in which the washing water is accommodated and the incineration ash and the washing water are mixed, and the sack 100 filled with the radioactive incinerator is immersed in the washing water. It may include a cradle 30, a cutter 40 installed on the cradle 30 to tear open the lower end of the sack 100.

In addition, the mixer 10 may further include a through shaft 50 installed on the cradle 30 and inserted into the sack 100 to fix the sack 100 to the cradle 30 . Accordingly, the sack 100 is fixed on the cradle 30 with a bottom surface embedded in the through shaft 50 while descending by its own weight. And, in this process, the bottom surface of the sack 100 is cut by the through shaft 50 and torn open by the cutter 40 .

In this way, the sack 100 is penetrated and cut by the through shaft 50 and the cutter 40 installed in the holder 30 in a state immersed in the washing water of the mixing tank 20 . Accordingly, the dust of the incineration ash from the bag 100 is not scattered into the atmosphere.

The mixing tank 20 accommodates washing water therein. The mixing tank 20 of this embodiment may form a square shape. The size or shape of the mixing tank 20 may be variously modified.

A door 22 for opening and closing an inlet may be provided at an upper portion of the mixing tank 20 . The door 22 may be opened when necessary to load the sack 100 into the mixing tank 20 . An outlet 24 for discharging washing water or a solid-liquid mixture of incineration ash and washing water may be formed on the lower side of the mixing tank 20 .

A holder 30 is provided inside the mixing tank 20 . The cradle 30 may be located below the entrance where the door 22 of the mixing tank 20 is installed. Accordingly, the sack 100 transported by the overhead crane or the like is lowered directly down through the open inlet and can be easily loaded on the cradle 30 .

The cradle 30 may be a frame structure extending horizontally. The cradle 30 is fixed to the mixing tank 20 via the support 32 installed at each corner and may be located in the washing water.

In this embodiment, the cradle 30 may include a plurality of horizontal frames 34 extending outward from the center and arranged at an angle along the circumferential direction.

The horizontal frame 34 may be a structure in the form of an elongated channel.

As shown in FIG. 2 , the horizontal frame 34 may be arranged at an angle of 90 degrees from the center of the cradle 30 to form a cross. Each horizontal frame 34 may have an integrated structure in which the inner ends are coupled to each other.

Accordingly, the sack 100 can be stably supported by being placed on four horizontal frames 34 extending outward at an angle of 90 degrees.

In addition, in this embodiment, the holder 30 minimizes the area in contact with the bag 100 , so that the open lower part of the bag 100 is not blocked entirely by the holder 30 and is covered only by a minimum area. Therefore, the incineration ash discharged through the incised sack 100 can be quickly mixed with the washing water while flowing downward through between the horizontal frames 34 of the holder.

The through shaft 50 is installed in the upper center of the holder 30 . The penetrating shaft 50 penetrates and fixes the sack 100 loaded on the cradle 30 .

The through shaft 50 of this embodiment may have a structure that protrudes upward and has a pointed tip. The through shaft 50 passes through the bag 100 when the bag 100 is lowered and is inserted into the bag to fix the bag 100 .

The penetrating shaft 50 is a plate structure erected vertically, and has a structure that can be easily inserted into the bottom surface of the sack descending by its own weight and penetrated. For example, the penetrating shaft 50 may have a triangular shape that is pointed toward the tip like an arrowhead.

Accordingly, when the sack 100 is lowered toward the cradle 30, the sack 100, which is lowered by its own weight, is pressed by the through shaft 50, and the sharp tip of the through shaft 50 penetrates the sack 100. . That is, the through shaft 50 passes through the lower part of the sack 100 and is inserted therein to support the sack 100 on the cradle 30 . Accordingly, the sack 100 may be fixed on the cradle 30 while being plugged into the through shaft 50 . As the through shaft 50 is inserted into the bottom surface of the bag 100 , the bottom surface of the bag 100 is cut by the through shaft 50 .

The lateral end of the through shaft 50 may have a blade formed so that the sack 100 can be easily cut.

The through shaft 50 may be arranged in the same form as the arrangement form of the horizontal frame. In this embodiment, the through shaft 50 may be formed in a cross shape to correspond to the horizontal frame 34 of the cradle 30 arranged in a cross shape.

That is, the through shaft 50 may have four right-angled triangular plates disposed at an angle of 90 degrees, and the vertical sides may be in contact with each other to form a cross shape.

The base of the through shaft 50 is spaced apart by a predetermined height on the horizontal frame 34, so that the edge between the inclined side tip and the hypotenuse and the base forming the horizontal bottom serves as a hook for hanging the lower part of the sack 100 and fixing it. have. Accordingly, when the sack 100 is completely inserted into the through shaft 50 and placed on the cradle 30 , the lower end of the sack 100 is caught on the edge of the through shaft 50 and firmly fixed on the cradle 30 . .

While the sack 100 is inserted into the through shaft 50 and fixed on the holder 30 , the cutter 40 moves along the cut portion by the through shaft 50 to completely cut the bottom surface of the sack 100 . will do

The cutter 40 of this embodiment is a rail 42 installed extending outward from the center of the cradle 30, a transfer block 44 moving along the rail 42, and a driving unit for moving the transfer block 44 ( 48), is installed on the transfer block 44 and may include a blade 46 for cutting the sack 100 according to the movement of the transfer block.

The rail 42 may be installed to extend along each horizontal frame 34 of the through shaft 50 .

Accordingly, the cutter 40 of this embodiment is the same as the arrangement structure of the horizontal frame 34, four are arranged at an angle of 90 degrees. Therefore, while the blade 46 of the cutter 40 moves along each horizontal frame 34, it is possible to cut the bottom surface of the sack 100 in a cross shape.

The transfer block 44 is provided with a wheel rolling along the rail 42 , for example, and may be moved along the rail 42 . The transfer block 44 reciprocates between the center end and the outer end of each horizontal frame 34 along the rail 42 .

The driving unit 48 may include, for example, a chain on which the transfer block 44 is installed and a gear for rotating the chain forward and reverse. By rotating the gear to move the chain, the transfer block 44 can be moved along the rail. The rotational drive of the gear may have a structure in which mechanical power such as a driving motor is used or an operator manually returns the gear.

In addition to the above structure, the driving unit 48 may be variously deformed, and any structural surface capable of reciprocating the transfer block 44 along the rail 42 installed on the horizontal frame 34 may be applied.

As shown in FIG. 3 , the blade 46 is inclined with respect to the moving direction, so that the bottom surface of the sack 100 can be more easily cut.

The blade 46 is disposed in the moving direction of the transfer block 44 , and is located below the lower end of the through shaft 50 . When the sack 100 is fully inserted into the through shaft 50 and seated on the cradle 30, the bottom surface of the sack 100 passes through the lower end of the through shaft 50 with a cut in the through shaft 50 and a blade ( 46) is put into position.

In this state, as the blade 46 moves according to the driving of the transfer block 44 , the bottom surface of the sack can be continuously cut along the cutting direction of the sack 100 cut by the through shaft 50 . Accordingly, as the cutting line of the bag is extended by the blade 46, the bottom surface of the bag can be completely cut to the end.

The cutter 40 of this embodiment may further include a clamping bar 47 installed on the transfer block 44 and extending above the blade 46 to spread and fix the bottom surface of the sack 100 in an incised state.

The sack 100 is cut in a cross shape by the clamping bar 47 to maintain an open state, so that the incineration ash can be more smoothly discharged from the inside of the sack 100 .

As shown in Fig. 3, the clamping bar 47 has a structure extending vertically upward from the top of the blade 46. Two clamping bars 47 form a pair and may be disposed on both sides of the through shaft 50 with the through shaft 50 interposed therebetween. Accordingly, the clamping bar 47 may be moved outwardly through the through axis without interference with the through axis 50 .

In addition, it is possible to press and fix the sack 100 by the two clamping bars 47 , thereby increasing the support force for the sack 100 and stably maintaining the open state of the incision of the sack 100 .

The distance between the pair of clamping bars 47 may be about a degree that the clamping bar 47 can move without interfering with the through shaft 50 .

The clamping bar 47 extends above the blade 46 , so that the clamping bar 47 can come into contact with the side of the bag from above the bottom surface of the bag 100 cut by the blade 46 . Accordingly, the clamping bar 47 is in contact with the uncut side of the sack so as to spread the sack 100 .

The clamping bar 47 may have a serrated side end in contact with the sack 100 . When the clamping bar 47 is in close contact with the side of the sack and the sack 100 is spread, the sack is tightly fixed to the teeth of the clamping bar 47 to prevent the sack from being separated from the clamping bar 47 .

Hereinafter, the sack cutting action will be described with reference to FIGS. 4 and 5 .

As shown, the sack 100 is fixed on the cradle 30 while being plugged into the through shaft 50 by its own weight.

The transfer block 44 of the cutter 40 is located at the center of the holder 30 , and the blade 46 is located on the bottom surface of the sack 100 cut by the through axis under the through axis 50 .

In this state, the transfer block 44 is moved along the rail 42 according to the driving of the driving unit 48 . As the transfer block 44 moves, the blade 46 installed on the transfer block 44 moves outward along each horizontal frame 34 from the center of the cradle 30 .

Accordingly, the blade 46 of each cutter 40 is moved in a cross shape. The blade 46 moves past the through shaft 50 , and the bottom surface of the sack 100 is continuously cut by the moving blade 46 . Therefore, the bottom surface of the bag is completely cut open in a cross shape. As the lower part of the sack 100 is opened, the incineration ashes accommodated in the sack 100 may be discharged from the sack 100 .

When the blade 46 completely cuts the bottom surface of the sack 100 and reaches the outer tip, the clamping bar 47 protruding above the blade 46 is in close contact with the inner side of the sack 100 . Accordingly, the bottom of the sack 100 is opened in a square shape by the four clamping bars 47 and maintained in a cross-cut state.

As described above, since the bottom surface of the bag 100 is completely cut and maintained in a cross shape, the incineration ash contained in the bag 100 can be discharged more quickly and effectively.

Since the entire bag 100 or the bottom side is immersed in the washing water of the mixing tank 20, the incineration ash discharged from the incised lower part of the bag 100 can be directly mixed with the washing water without scattering into the atmosphere.

Therefore, it is possible to fundamentally prevent dust from scattering in the process of injecting the incineration ash from the bag 100 into the washing water of the mixing tank 20 .

In this way, the incineration ashes of the sack are discharged downward through the bottom in the shape of a cross cut and are mixed with the washing water.

The incineration ash discharged from the lower part of the bag 100 can be effectively mixed with the washing water by the circulation flow of the washing water in the mixing tank 20 .

To this end, the mixer 10 may further include a circulation unit 60 installed at the bottom of the mixing tank 20 and spraying washing water into the mixing tank 20 to mix incineration ash and washing water.

The circulation unit 60 includes at least one or more injection nozzles 62 installed at intervals on the bottom of the mixing tank 20, installed in the lower portion of the mixing tank 20, connected to the injection nozzles 62, and receiving washing water therein. It may include at least one washing water chamber 64 and a washing water supply unit 90 connected to the washing water chamber 64 to supply washing water to spray the washing water through the spray nozzle 62 .

Washing water is supplied from the washing water supply unit 90 to the washing water chamber 64 . The washing water supplied to the washing water chamber 64 is ejected from the bottom of the mixing tank 20 through the spray nozzle 62 . Accordingly, as the washing water is circulated, the washing water and the incineration ash can be mixed smoothly. The incineration ashes are discharged from the lower part of the bag 100 cut in the holder 30 and fall, and are effectively mixed while being stirred by the rising washing water.

In the mixer 10 of this embodiment, the position of the water surface in the mixing tank 20 continues to change when the incinerator is discharged as the incineration ash is discharged while the bag 100 is submerged in the washing water.

Therefore, it is difficult to apply a generally used mixing structure using a rotary blade. As described above, in this device, the washing water is sprayed through the spray nozzle 62 and the washing water is continuously circulated in the mixing tank 20, so that it is possible to evenly mix the washing water and the incineration ash without a separate rotary blade. .

As shown in FIG. 2 , the injection nozzles 62 and 62 may be installed horizontally and vertically at regular intervals on the bottom surface of the mixing tank 20 . Accordingly, the washing water can be uniformly ejected from the inside of the mixing tank 20 as a whole. Therefore, the washing water and the incineration ash can be more uniformly mixed in the mixing tank 20 .

A cover 63 may be wrapped around the top of the spray nozzle 62 and installed. The cover 63 surrounds the entire tip of the spray nozzle 62 and the lower end is bent toward the bottom of the mixing tank 20, thereby guiding the spraying direction of the washing water through the tip of the spray nozzle 62 in the overall downward direction. Accordingly, the washing water sprayed from the injection nozzle 62 is discharged toward the bottom of the mixing tank.

In this way, the upper end of the injection nozzle 62 is covered by the cover 63, and it is possible to prevent deposits such as incineration ash from being accumulated on the top of the injection nozzle 62 or from flowing in. In addition, the washing water sprayed from the spray nozzle 62 as a whole is guided downward by the cover 63 and may be discharged toward the bottom of the mixing tank 20 .

As the washing water supplied from the washing water supply unit 90 is sprayed through the spray nozzle 62 , a flow of washing water is formed in the mixing tank 20 . Accordingly, the washing water can be mixed more effectively with the incineration ash discharged from the open lower part of the bag 100 while continuously circulating inside the mixing tank 20 .

In addition, the washing water sprayed from the spray nozzle 62 is directed toward the bottom of the mixing tank by the cover, thereby preventing the incineration ash from being deposited on the bottom of the mixing tank 20 and can be mixed with the washing water evenly.

In the present embodiment, the washing water chamber 64 is divided into a plurality, so that they are sequentially operated to circulate the washing water. Accordingly, it is possible to continuously circulate the washing water in the mixing tank 20 with a smaller capacity without covering the entire area 63 of the mixing tank 20 at once.

The number of washing water chambers 64 of the circulation unit 60 , the number of spray nozzles 62 , the amount of washing water sprayed, etc. may be variously modified.

In addition, the mixer 10 of this embodiment is installed inside the mixing tank 20 and may further include a spray unit 70 for preventing the incineration ash from accumulating on the bottom of the mixing tank 20 under the holder 30. .

The spray unit 70 is installed on one side of the lower side of the mixing tank 20 and is installed at the injection port 72 and the injection port 72 for spraying washing water to the bottom of the mixing tank 20 under the cradle to supply washing water. A supply unit 90 may be included.

The injection port 72 may be formed to face the bottom of the mixing tank 20 just below the cradle, that is, the location where the incineration ash discharged from the sack is piled up. Accordingly, the incineration ash falling to the bottom of the mixing tank 20 by the washing water ejected through the inlet 72 is not stacked and all mixed with the washing water.

The mixer 10 of this embodiment may further include a washing unit for washing the incineration ash remaining in the bag 100 . Accordingly, incineration ashes that are not discharged from the bag 100 in the process of discharging the incineration ash may be separated from the inner surface of the bag 100 by the washing unit and all discharged.

As shown in FIG. 6 , the washing unit is connected to at least one inner injection nozzle 80 , the inner injection nozzle 80 for spraying washing water into the bag 100 through the incised lower part of the bag 100 , and is connected to the washing water It may include a washing water supply unit 90 for supplying the.

A separate support frame 82 is installed below the cradle 30 , and the inner injection nozzle 80 may be installed on a conduit disposed along the support frame 82 . The support frame 82 may be fixedly installed in the mixing tank 20 by a vertical frame 83 installed at the outer tip.

The support frame 82 of this embodiment may form a cross shape like the horizontal frame 34 of the cradle 30 . The cross-shaped support frame 82 is positioned between the horizontal frames 34 of the cradle 30 and crosses the horizontal frame 34 . Accordingly, the washing water sprayed from the inner spray nozzle 80 installed in the horizontal frame 34 can be smoothly sprayed into the sack 100 without interfering with the horizontal frame 34 .

The inner spray nozzle 80 may be disposed toward the inner surface of the bag 100 to spray the washing water toward the inner surface of the bag 100 through a cutout on the bottom surface.

At least one inner injection nozzle 80 may be installed along each support frame 82 arranged in a cross shape.

The washing water supply unit 90 may have a structure that supplies new washing water or washing water inside the mixing tank 20 to the inner injection nozzle 80 .

The washing water supplied from the washing water supply unit 90 is supplied through a conduit disposed inside the support frame 82 , and is injected into the inner surface of the sack 100 through the inner injection nozzle 80 installed along the conduit. The incineration ash remaining attached to the inner surface of the bag 100 may be discharged by the washing water sprayed at high pressure from the inner spray nozzle 80 . Accordingly, all the incineration ash loaded inside the bag 100 can be completely discharged and mixed with the washing water.

In addition, the washing unit is disposed around the sack 100 at the inner upper portion of the mixing tank 20 and is installed along the pipe 84 and a ring-shaped pipe 84 connected to the washing water supply unit 90, the sack ( 100) may further include an outer spray nozzle 86 for spraying the washing water on the outer surface.

The upper surface of the bag 100 is washed by the washing water sprayed through the outer spray nozzle 86 . Accordingly, the incineration ash or dust attached to the outer surface of the bag 100 falls and is mixed with the washing water, and it is also possible to prevent the dust from scattering.

The pipe 84 is a circular ring structure, and for example, may be fixedly installed on the vertical frame 83 fixing the support frame 82 . The pipe 84 may be variously deformed, such as a square shape in addition to a circular shape.

The pipe 84 may be installed at a height greater than or equal to the water level of the washing water in the mixing tank 20 so as not to be submerged in the washing water and located thereon. Accordingly, the outer spray nozzle 86 may spray the washing water to the surface of the sack 100 outside the water surface of the mixing tank 20 . Reference numeral 87 denotes a supply pipe connected to the pipe 84 and the support frame 82 internal pipe through the upper part of the mixing tank 20 to supply washing water.

A plurality of outer injection nozzles 86 may be arranged and installed at intervals along the pipe 84 . The outer spray nozzle 86 is disposed toward the center of the pipe 84 to spray the washing water on the outer surface of the bag 100 passing through the pipe 84 . The outer spray nozzle 86 may be, for example, a pressure spray nozzle capable of spraying washing water in the form of mist. Accordingly, the outer spray nozzle 86 widely sprays the washing water in the form of fine particles to evenly clean the entire outer surface of the sack 100 .

As the bag 100 passes through the pipe 84 and descends into the washing water, the washing water is sprayed from the outer spray nozzle 86 to the outer surface of the bag 100 . Therefore, dust or incineration ash attached to the outer surface of the bag 100 is washed away by the washing water. In addition, since the surface of the bag 100 is wetted with the washing water before the bag 100 is put in with the washing water, generation of dust in the bag 100 can be prevented.

When the incineration ash is completely discharged, the bag 100 is removed from the mixing tank 20 . The bag 100 is put in the washing water of the mixing tank 20, so it is necessary to remove moisture when it is removed in a wet state. Accordingly, the mixer of the present embodiment may further include a water removal unit for removing moisture from the bag 100 when the bag 100 is removed.

The water removal unit may include a pair of wiping rolls 88 that are respectively installed at the ends of a pair of doors 22 that open and close the upper entrance of the mixing tank 20 and come into contact with each other while the door 22 is closed when the entrance is closed. have. The wiping roll 88 may be freely rotatably installed at the front end of the door 22 .

The pair of doors 22 may be opened and closed in a sliding manner, for example. The door 22 may be slidably installed in opposite directions along a rail installed at the upper inlet of the mixing tank 20 . Accordingly, when the door 22 is opened, the pair of doors 22 are moved in opposite directions to open, and the pair of wiping rolls 88 are also spaced apart to open the entrance. When the door 22 is closed, the entrance is closed as the pair of doors 22 approach each other, and the pair of wiping rolls 88 also come into close contact with each other. Accordingly, when the sack 100 is taken out from the mixing tank 20 , the washing water attached to the sack 100 is removed by being pressurized while passing between the wiping rolls 88 to which the sack 100 is in close contact.

Therefore, even if the sack 100 is put in the washing water, the sack 100 can be taken out in a state in which the water is removed while the water of the sack 100 is squeezed out by the wiping roll 88, and the washing water from the sack 100 is It can be prevented from falling and contamination of the equipment.

The water removal unit may further include a pair of guide rolls 89 disposed in a direction perpendicular to the wiping roll 88 at both ends of the wiping roll 88 . Each guide roll 89 may be installed inside the upper end of the mixing tank 20 inlet side. The two guide rolls 89 are spaced apart from each other by the length of the outer ear wiping roll 88 and are respectively disposed at both ends along the axial direction of the wiping roll 88 . Each guide roll 89 may be freely rotatably installed in the mixing tank 20 .

The guide roll 89 guides the side end of the sack 100 from the tip of the wiping roll 88 toward the entrance.

The side end of the sack 100 is guided toward the wiping roll 88 while in contact with the guide roll 89 so that it can smoothly pass between the wiping rolls 88 .

In addition, when the door 22 is opened, two wiping rolls 88 and two guide rolls 89 are disposed in a square shape to guide the bag 100 . Accordingly, in the process of charging the sack 100 inside through the inlet of the mixing tank 20, the wiping roll 88 and the guide roll 89 are freely rotated to guide the sack 100 to accurately top the cradle 30. It becomes possible to move the sack 100.

7 shows a structure for supplying washing water to the mixing tank 20 of this embodiment.

As shown in FIG. 7 , the washing water supply unit 90 may selectively supply washing water or fresh washing water accommodated in the mixing tank 20 .

The washing water supply unit 90 is connected to the outlet line 91 of the mixing tank 20 and is installed in the circulation line 92 for circulating and supplying the washing water in the mixing tank 20 and the circulation line 92 to supply the washing water. is branched from the circulation line 92 and connected to the inner injection nozzle 80, the outer injection nozzle 86, the inlet 72 or the washing water chamber 64 inside the mixing tank 20. Circulation branch line 94 to be used, a supply line 95 for supplying washing water from a new washing water supply source to the pipe 84, a supply pump 96 installed in the supply line 95 to supply new washing water, and the supply A supply branch line 97 branched from the line 95 and connected to the circulation branch line 94 to supply new washing water through the circulation branch line 94, the circulation line 92 and the supply line 95 and an on/off valve installed on one side of each branch line (94, 97) to control the supply of washing water, and a switching valve (98) installed between the circulation branch line (94) and the supply branch line (97) to change the flow direction. may include

For example, according to the driving of the circulation pump 93, the washing water inside the mixing tank 20 flows from the outlet line 91 along the circulation line 92 and the circulation branch line 94 to the washing water chamber 64 or the inlet ( 72) or may be supplied to the inner injection nozzle (80). Accordingly, the washing water is injected through the injection nozzle 62 connected to the washing water chamber 64 , the inlet 72 , or the inner injection nozzle 80 .

When the supply pump 96 is driven, new washing water is supplied to the outer injection nozzle 86 through the supply line 95 , and the washing water can be sprayed on the outer surface of the bag 100 through the outer injection nozzle 86 .

In addition, by driving the switching valve 98 to switch the flow path, the flow path between the circulation line 92 and the circulation branch line 94 is connected, or the flow path between the supply branch line 97 and the circulation branch line 94 is connected. can Accordingly, the washing water inside the mixing tank 20 may be supplied to the injection port 72 or the inner injection nozzle 80 , or a new washing water may be supplied to the injection port 72 or the inner injection nozzle 80 by switching the flow path.

Accordingly, by controlling the flow path by driving the on/off valve and the switching valve 98, new washing water or washing water in the mixed tank can be supplied and sprayed to a required place. Accordingly, it is possible to maintain a constant ratio of the washing water to the powder while continuously supplying the washing water into the mixing tank 20 .

Here, since the washing water in the mixing tank 20 is supplied to the circulation line 92 and the circulation branch line 94, these pipes or the washing water chamber 64 may be clogged by sediment.

The washing water supply unit 90 of this embodiment is installed between the supply line 95 and the circulation line 92, and a cleaning line 99 may be further provided to enable purging and draining by new washing water.

If necessary, new washing water may be supplied to the circulation line 92 and each circulation branch line 94 connected to the circulation line through the cleaning line 99 to clean the sediment in the pipeline. In addition, by discharging the washing water of the circulation line 92 and the circulation branch line 94 through the cleaning line 99, it is possible to remove the sediment.

Therefore, when the pipeline is clogged, it is possible to easily open the clogged pipeline by supplying new washing water to the circulation line without disconnecting the equipment or the pipeline.

As described above, although exemplary embodiments of the present invention have been illustrated and described, various modifications and other embodiments may be made by those skilled in the art. All such modifications and other embodiments are intended to be contemplated and included in the appended claims without departing from the true spirit and scope of the present invention.

10: mixer 20: mixing tank
22: door 24: exit
30: cradle 34: horizontal frame
40: cutter 42: rail
44: transfer block 46: blade
47: clamping bar 48: driving unit
50: through shaft 60: circulation part
62: injection nozzle 63: cover
64: washing water chamber 70: spray unit
72: inlet 80: inner injection nozzle
82: support frame 83: vertical frame
84: pipe 86: outer injection nozzle
88: wiping roll 89: guide roll
90: washing water supply unit 91: exit line
92: circulation line 93: circulation pump
94: circulation branch line 95: supply line
96: supply pump 97: circulation supply line
98: switching valve 99: cleaning line

Claims (7)

Including a mixer for mixing radioactive incineration ashes and washing water,
The mixer includes a mixing tank in which washing water is accommodated and mixing of incineration ash and washing water is made, a holder provided inside the mixing tank to support a sack filled with radioactive incineration ash in the washing water, and a cutter installed in the holder to tear the lower end of the sack and open it A radioactive incinerator decontamination device comprising a. The method of claim 1,
It is installed on the cradle further comprising a through shaft for fixing the sack,
The through shaft is installed on the cradle and protrudes upward to penetrate the bottom surface of the sack when the sack is lowered and is inserted into the radioactive incinerator decontamination device. 3. The method according to claim 1 or 2,
The cutter is installed extending outward from the center of the cradle, a transfer block moving along the rail, a driving unit for moving the transfer block, and vertically extended on the upper end of the transfer block to penetrate the sack and insert the inside Radioactive incineration ash decontamination apparatus including a blade inserted into and cutting the sack according to the movement of the transfer block. 4. The method of claim 3,
The mixer further includes a circulation unit installed at the bottom of the mixing tank and mixing the incineration ash and the washing water by jetting washing water into the mixing tank,
The circulation unit is connected to at least one or more spray nozzles installed at intervals on the bottom of the mixing tank, at least one washing water chamber installed under the mixing tank and connected to the jet nozzle and receiving washing water therein, and the washing water chamber. A radioactive incineration ash decontamination device including a washing water supply unit for supplying washing water and spraying washing water through the spray nozzle. 4. The method of claim 3,
Further comprising a washing unit for washing the incineration ash remaining in the bag,
The washing unit is installed on the cradle and at least one inner injection nozzle for spraying washing water into the sack through the incised lower part of the sack, and a washing water supply unit connected to the inner injection nozzle to supply washing water Radioactive incineration ash decontamination apparatus . 6. The method of claim 5,
The washing unit is disposed around the sack at the upper inner side of the mixing tank and a ring-shaped pipe connected to the washing water supply unit, and an outer spray nozzle installed along the pipe to spray washing water on the outer surface of the sack Radioactive incineration ash decontamination device. 4. The method of claim 3,
Further comprising a water removal unit for removing water from the bag in which the incineration ashes are discharged,
The water removal unit includes a pair of wiping rolls respectively installed at the ends of a pair of doors that open and close the upper inlet of the mixing tank and come into contact with each other while the door is closed when the entrance is closed. A radioactive incineration ash decontamination device with a structure in which the washing water attached to the sack is removed by being pressurized between the wiping rolls.

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