KR20170058224A - Volume compaction and carbonization system for low-level radioactive waste - Google Patents

Abstract

The present invention relates to a low-level radioactive waste carbonization system. The low-level radioactive waste carbonization system can carbonize low-level radioactive wastes such as gloves, work uniforms, and replaced parts used in nuclear power plants to significantly reduce the volume of the waste, maximize the efficiency of the radioactive waste treatment facilities, which can be difficult to build due to not in my backyard (NIMBY) phenomena, and significantly reduce the amount of discharged harmful gas compared to a conventional incineration method. According to the present invention, the low-level radioactive waste carbonization system for volume reduction includes: a carbonaceous furnace path including a low-level radioactive waste input unit, a discharging unit, an exhaust unit, a heat source, and a nitrogen supply unit; an inertial collision screen connected to the exhaust unit of the carbonaceous furnace path; and a filter unit connected to the inertial collision screen.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a low-level radioactive waste carbonization system for reducing volume,

The present invention relates to a low level radioactive waste carbonization system for volume reduction,

More specifically, carbonization of low-level radioactive wastes such as gloves, work clothes, and replacement parts used in nuclear power plants can greatly reduce the volume of the radioactive waste, thereby maximizing the efficiency of the radioactive waste disposal plant, The present invention relates to a low-level radioactive waste carbonization system capable of drastically reducing the emission of harmful gas.

Radioactive waste refers to all types of waste containing radioactive materials that arise from dealing with nuclear reactors, nuclear fuel, and artificial radioactive isotopes. Wastes, fission products, cooling water, cooling gas, and other materials related to nuclear facilities or radioactive materials handling workshops or laboratories, as well as tools, cloths, paper, and washing water used in experiments or work are also regarded as radioactive waste.

Among the radioactive wastes classified as high-level radioactive waste and low-level radioactive waste according to the radioactive level, high-level radioactive waste can be recycled more than 95% of the radioactive waste after the spent nuclear fuel and its reprocessing process. It is not considered a radioactive waste.

In addition, among the low-level radioactive waste, the radioactive waste having a relatively high radioactive level may be distinguished as the intermediate waste. Most of the low-level radioactive waste is a waste containing beta rays or gamma rays.

Low-level radioactive wastes should be stored in the radioactive waste disposal site waste repository by means of cementing the radioactive waste drums with waste such as gloves, slippers, work clothes, and replacement parts used by operators or maintenance personnel of nuclear power plants.

Low-level radioactive waste is classified into gas, liquid, and solid depending on its type, and there are differences in the storage methods.

Gas wastes are stored in a sealed tank and, when the radioactivity falls below the standard value, they are filtered by a high performance filter (eg, HEPA filter) with particle removal function and released to the atmosphere. 99.99% or more of the radioactive material is removed by filtration, and the high-performance filter is treated as solid waste after its lifetime has expired.

The weight concentration of liquid waste is collected in the reservoir below 1 ppb (1 / billionth), then the clean water is recycled using the evaporator, and the residue is made into a stable solid, sealed in iron drums and stored. Waste liquids with low radioactivity levels and low salinity are filtered and diluted with large amounts of dried water.

Finally, solid wastes can be divided into combustible and non-combustible. Burnable solid wastes are generally incinerated into ash, reducing the volume to 1/20. The incombustible solid waste is compressed, melted and solidified and placed in a steel drum and stored in a power plant or a storage room in a sealed state.

In general, the disposal and treatment of radioactive waste at the radioactive waste disposal facility is legally stipulated that the effect on the natural radioactivity of the radioactive waste should be less than 1/10 of the maximum allowable dose (allowable dose).

In general, flammable low and medium level solid wastes such as work clothes are reduced by incineration treatment, and then the asbestos-containing ash along with other non-combustible solid waste is placed in a sealed container to prevent the radioactive material from leaking out.

The location of the radioactive waste disposal site is extremely limited, and in the case of a country with a small land area like Korea, there is a problem that it is not easy to additionally construct a radioactive waste disposal site due to a large number of inhabitants from the place where the radioactive waste disposal site is installed.

In the radioactive waste disposal plant, volume and weight are inevitably increased due to the drum filling and concrete fixing system. However, the new radioactive waste disposal plant is difficult to newly establish and expand due to the unique NIMP phenomenon. In reality, And it is urgent to secure cleanliness and safety in processing such as incineration.

As a technology related to a conventional radioactive waste disposal apparatus, there is a patent registration No. 10-1073661 (registered on October 07, 2011) [Incineration Equipment for Radioactive Waste]

In this patent, the incinerator is made of a ceramic material, and by generating a high temperature by itself through the magnetron, the waste can be burned, so that a safety accident such as an explosion accident due to external ignition can be prevented in advance, And a cooling chamber is provided outside the rotary shaft of the incinerator to prevent the heat of the inside of the rotary shaft and other parts Which can prevent thermal damage to the radioactive waste, thereby extending the lifetime of the apparatus as a whole.

However, since the combustion method generates a large amount of exhaust gas, the filter is burdened, the operation and maintenance cost is high, and it is insufficient to obtain trust related to the cleanliness and safety of the nearby residents.

Next, Patent Registration No. 10-0976770 (registered date Aug. 12, 2010) [a device for treating flammable radioactive waste using microwave]

The registered patent is to burn the radioactive waste such as various garments, gloves and shoes, which are discarded after being used in nuclear reactor facilities, at a high temperature and burn it to reduce the volume, The gas is collected separately, and the various harmful substances contained in the gas are filtered once again with the pyrolysis, and then discharged to the atmosphere, thereby reducing the environmental pollution problem. Further, these processes can be continuously performed, And a microwave-assisted flammable radioactive waste disposal apparatus.

However, this patent also holds the weakness of the combustion method.

Also, Patent Registration No. 10-1281778 (registered on June 20, 2013) [Treatment of carbon-containing radioactive waste]

This patent discloses the use of graphite structures ("sleeves" surrounding nuclear fuel assemblies, or "bricks" used as reflectors or moderators) or organic resins (mainly beads) used to confine other radioactive wastes, Or in the form of pellets).

However, this patent applies only to specific wastes called carbon-containing radioactive wastes, which are not related to the general treatment of low-level radioactive wastes.

Subsequently, there is a patent registration No. 10-1333499 (registration date November 21, 2013) [radioactive waste carbonization apparatus]

This patent discloses a radioactive waste carbonization apparatus capable of carbonizing a low-level waste such as clothes or gloves contaminated with radioactivity to a minimum volume and at the same time protecting a carbonyler from high-temperature heat generated during carbonization.

The present invention proposes a technique for preventing low-level waste from being adhered to a carburetor while simultaneously deforming the low-level waste into a minimum volume state after carbonizing it.

However, this patent does not propose an effective removal technique for the radioactive particles contained in the exhaust gas discharged from the carbonization process, and it poses a problem of additional cost for processing additional radioactive materials due to the liquefaction of the exhaust gas.

Accordingly, the present invention can maximize the efficiency of a radioactive waste disposal plant, which is difficult to establish due to the NIMBY phenomenon, by carbonizing low-level radioactive waste such as gloves, work clothes, and parts after replacement, which are used in nuclear power plants, Which is capable of drastically reducing the emission amount of harmful gas compared with the conventional radioactive waste.

In addition, the present invention can reduce the volume of the radioactive particles contained in the exhaust gas generated in the carbonization process of the low-level radioactive waste through the inertial impact screen connected to the exhaust part of the carbonization furnace, by using inertia, The present invention also provides a low-level radioactive waste carbonization system.

The present invention also relates to a low-level radioactive waste carbonization system for volume reduction, which is provided at the rear end of an inertial impact screen and is composed of a bag filter and a low-temperature catalytic filter and ensures a more complete treatment of the carbon monoxide exhaust gas through a filter unit including a chemical- The purpose is to provide.

Further, the present invention provides a low-level radioactive waste carbonization system for reducing the volume of a carbonaceous furnace and an inertial impact screen in combination with a primary and secondary carbonaceous furnace and an inertial impingement screen to enable complete removal of radioactive particles contained in the carbonaceous exhaust gas And to provide the above objects.

In addition, the present invention is characterized in that the heat source of the carbonization furnace is constituted by a direct heat source or an indirect heat source constituted by a plurality of heat transfer pipes or an indirect heat transfer plate, so that a suitable heat source can be adopted according to the type of radioactive waste, It is an object of the present invention to provide a waste carbonization system.

In order to achieve the above object, a low-level radioactive waste carbonization system for volume reduction according to the present invention comprises:

A carbonization furnace having a low-level radioactive waste loading section, a discharge section, an exhaust section, a heat source, and a nitrogen supply section;

An inertial impact screen connected to an exhaust portion of the carbonization furnace; And

A filter portion connected to the inertial impact screen;

.

Further, in the low-level radioactive waste carbonation system for volume reduction according to the present invention

Wherein the filter unit comprises a bag filter and a low-temperature catalyst filter,

The filter unit is connected to the medicine supply unit,

Preferably, the carbide furnace is composed of a first coal furnace and a second coal furnace connected to each other, and the inertia impact screen is composed of a primary screen and a secondary screen provided at a rear end of the exhaust part of each carburetor.

Further, in the low-level radioactive waste carbonization system for volume reduction according to the present invention

The heat source of the carbonization furnace is arranged at an upper portion of the furnace,

A direct or indirect lower heat source composed of an induction heating plate arranged at the bottom of the carbonization furnace,

Or both of them.

The low-level radioactive waste carbonization system for reducing the volume according to the present invention is characterized in that the carbonization of low-level radioactive wastes such as gloves, work clothes and replacement parts used in nuclear power plants significantly reduces the volume thereof, This system is designed to maximize the efficiency and to reduce the emission of harmful gas compared with existing incineration treatment method and to reduce the amount of exhaust gas generated in the carbonization process of low level radioactive waste through the inertial impact screen connected to the exhaust part of carbon furnace. The radioactive particles contained in the inertial impact screen can be removed by using inertia and centrifugal force collision effects and exhausting characteristics, and furthermore, the inertial impact screen is provided at the rear end of the inertial impact screen and comprises a bag filter and a low temperature catalytic filter, Ensuring more complete treatment of the gas, Furthermore, the carbide furnace and the inertial impingement screen are combined with the primary and secondary carbide furnaces and the inertial impingement screen to enable complete removal of the radioactive particles contained in the carbonized exhaust gas. In addition, A direct or indirect lower heat source composed of an upper heat source constituted by a heat transfer pipe or an induction heat transfer plate, so that it is possible to adopt a suitable heat source according to the type of radioactive waste, thereby improving the versatility.

1 is an overall view of a low-level radioactive waste char combustion system for volume reduction according to the present invention;
2 is a block diagram of a low-level radioactive waste char combustion system for volume reduction according to the present invention.
3 is a process flow diagram of a low-level radioactive waste char combustion system for volume reduction according to the present invention.
4 is a view of a carbon furnace;
5 is a view of a furnace having a deformation lower heat source.
6 is a view of an inertial impact screen;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

While the present invention has been described in connection with certain embodiments, it is obvious that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the digits of the tens and the digits of the digits, the digits of the digits, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In the drawings, the components are expressed by exaggeratingly larger (or thicker) or smaller (or thinner) in size or thickness in consideration of the convenience of understanding, etc. However, It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

It is to be understood that the first to second aspects described in the present specification are merely referred to in order to distinguish between different components and are not limited to the order in which they are manufactured, It may not match.

When describing the low-level radioactive waste carbonization system (A) for volume reduction according to the present invention with reference to an unstructured rough direction reference for convenience, referring to FIGS. 1 and 2,

Level radioactive waste W into the charging section 11A through the charging die 10, particularly the primary charring furnace 10A through the charging die 11a, and the combustion gas is discharged from the combustion chamber 10 ) Is set to the rear side, and the opposite side is set to the front side.

First, as shown in the whole carbonization system diagram shown in the plan view of FIG. 1 [A] and the side view of [B], the carbonization processing flow block diagram of FIG. 2, and the carbonization processing flowchart of FIG. 3, A low-level radioactive waste carbonization system (A) for shrinking comprises a carbon furnace (10), an inertial impact screen (20), a filter unit (30), and a flue (40).

Particularly, the carbonization furnace 10 according to the present invention is composed of the primary carbide furnace 10A and the secondary carbide furnace 10B to ensure complete treatment of the low-level radioactive waste W and the carbonized exhaust gas.

Each of the carbide furnaces 10A and 10B includes low-level radioactive waste W charging units 11A and 11B, carbonized waste discharging units 13A and 13B, exhaust units 15 and 15B, a heat source 17, And an inert gas, particularly a nitrogen (N ₂ ) supply unit 19, which carbonizes in each closed carbonaceous furnace after charging the radioactive waste W and ensures airflow.

In Fig. 1 [B], a carbonized waste storage drum D13, which is finally transported to the radioactive waste disposal site and processed, can be identified below the discharge portion 13A of the first char combustion furnace.

The charging portion 11B of the secondary carbide furnace 10B is connected to the exhaust portion 15A of the primary carbide furnace 10A and is utilized for the purpose of re-burning the carbonized exhaust gas, It can be utilized for combustion of reclaimed flue or new waste,

The simple primary carbide exhaust gas re-burning discharge portion 13B of the two-stage coal furnace can be omitted, and is shown by a dotted line in FIGS.

When the carbonization furnace 10 is constituted by the primary carbide furnace 10A and the secondary carbide furnace 10B connected to each other, the inertia collision screen 20 is arranged at the rear end of the exhaust portions 15A and 15B of the respective carbides And a primary screen 20A and a secondary screen 20B.

1, 3, and 4, the heat sources 17 of the carbonization furnaces 10, 10A, and 10B are arranged on the upper portions of the carbonization furnaces, It may be an upper heat source 17A composed of a pipe.

Alternatively, as shown in FIG. 5, the lower heat source 17B may be arranged below the carbonization furnace.

The ceramic board b1 in the outermost layer, the insulating bricks in the middle (Fig. 4), the ceramic block b1 in the outermost layer b2 and the inner refractory b3 and the refractory at the charging portions 11A and 11B and the discharging portions 13A and 13B in particular the castable refractory b4.

5, the lower heat source 17B is formed by stacking the ceramic board b1, the heat insulating bricks b2 and the refractory blocks b3 in this order,

In FIG. 5A, it is assumed that a heat source, particularly an induction coil c1 (preferably a plurality of induction coils is arranged, see a schematic view in the right one-dot chain line on the right side of FIG. 5 [A]) is embedded in the refractory bell b3, And a direct lower heat source 17a in which a quartz plate (c2) excellent in heat and heat resistance is arranged,

Alternatively, in FIG. 5B, the metal plate, particularly the SUS plate c3, may be arranged on the quartz plate c2 to constitute an indirect lower heat source 17b utilizing radiant heat.

It is possible to introduce both the upper heat source and the lower heat source as required, and the metal plate c3 can be configured to be a removable type so as to constitute a direct or indirect lower heat source selection type.

Next, in the case where the carbonization furnace 10 is composed of the primary carbide furnace 10A and the secondary carbide furnace 10B, the primary screen 20A and the secondary screen 20B provided at the rear end of the exhaust portions 15A and 15B of the respective carbide furnaces, A secondary screen 20B is provided,

As shown in Fig. 6 (A side view and sectional view on side [B]), each of the inertia-impact screens 20A and 20B has an inertia-impact screen module 20A in a case provided with an inlet 20a and an outlet 20b. (20S), and the case is provided with a service door (20d) for maintenance,

It is preferable that the case is filled with refractory material, particularly ceramic fiber 20c. The case may be provided with a check window as required.

These inertial impact screens 20A and 20B are systems for dropping and collecting the radioactive particles contained in the carbonized exhaust gas using a plurality of spaced apart inertial impact screens and may be called a Particle Disturbing System ,

As a result, the radioactive particles contained in the exhaust gas generated in the carbonization process of the low-level radioactive waste are subjected to inertia and centrifugal force (moving along the airflow flowing through the radioactive particles or fine particles, Which is a symbolic representation of the phenomenon of collision with the screen impact surface of the screen).

The perforated screens in each inertial impingement screen 20A, 20B, in particular the inertial impingement screen module 20S, are gathered in spaced apart form and the filtration holes of either perforated screen are aligned with corresponding filtration holes (The filtration hole of the front perforation screen is formed upward, and the perforation screen immediately after the bottom is formed by 45 degrees), or size, or both of them are different ,

As can be seen from the front view of the bottom one-dot chain line in Fig. 6 [B], one perforation screen can also be divided to introduce different filtration hole shapes (formation direction or size, or both) In the perforation screen of the filtration hole, the filtration hole is not formed in a straight line in any one direction, but it can introduce various structures of inertia collision resistance for collecting radioactive particles, such as a bent structure, a diminishing or increasing structure, or a concave-

The heat exchange unit 21 is provided in front of the secondary screen 20B to reduce the temperature of the carbon dioxide exhaust gas discharged from the exhaust part 15B of the secondary carbide furnace 10B to reduce the load on the secondary screen, The recycled portion 21b can be configured to recycle the heated air through the blower 21a of the heat exchanging portion 21, for example, for heating, processing, etc. (as shown in Fig. 3, Air is merged into the flue 43 (stack) and discharged. The outside air passing through the heat exchange unit may be supplied to the primary or secondary or both of the carbonization furnaces as necessary to adjust the carbonization ratio and the treatment efficiency of the waste.

As can be seen in FIG. 3, the inertial impact screen connected to the exhaust part of each carbonaceous furnace uses radioactive particles contained in the exhaust gas generated in the carbonization process of the low-level radioactive waste as inertia and centrifugal force, It can be confirmed that the compressor 33a, the storage tank 33b, the cooler 33c, and the dryer 33d are constituted by compressed air (PA) supply unit 33 (in Fig. 2, The chiller and dryer are connected as needed to provide exhaustion and regeneration of the inertial impact screen, and the exhausted waste is also transported to the radioactive waste disposal plant in a storage drum, such as a carbonated waste storage drum.

The filter unit 30 for treating the carbonized exhaust gas is composed of a bag filter 30A and a low temperature catalytic filter 30B,

The bag filter 30A is particularly connected to the chemical feeder 31, particularly the slaked lime and activated carbon feeder 31A, to remove sulfur oxides (SOx) and dioxins,

The low temperature catalytic filter 30B is preferably constituted by a titanium alloy or the like so as to remove dioxins and nitrogen oxides (NOx), and particularly to be connected to the ammonia supply portion 31B to enhance the removal efficiency of nitrogen oxides Do.

The bag filter 30A and the low temperature catalytic filter 30B are also connected to a pressurized air (PA) supply unit 33 to increase the filtration efficiency and provide the draining and regenerating function. It is stored in the storage drum as a storage drum and transported to the radioactive waste disposal plant.

Further, in the present invention, a photooxidation (PO) is further introduced into the downstream end of the filter unit 30, and in a case having a carbonization exhaust gas inlet and an outlet, UV A baffle plate or a perforated plate in which a lamp (or a variety of photo-oxidation lamps such as an IR lamp, if necessary) can be arranged and the exhaust gas collision efficiency can be increased so as to increase the contact area with the UV lamp, A plurality of inclined collision plates arranged up and down can be arranged to optionally configure the organic materials such as VOC's to be photo-oxidized.

Finally, the exhaust gas is discharged into the atmosphere through the flue gas 43 in the form of a clean gas, and the flue 40 is provided with a blower 41 in front of or behind the flue in order to increase the exhaust efficiency .

The following examples are provided for a more detailed understanding of the present invention.

[Primary Carbonization Furnace (10A)]

 It is a facility to carbonize the performance of low-level wastes according to specifications.

 (1) Primary Carbonization Furnace

  ① Type [Batch type]

  ② Quantity [1]

  ③ Specification

  Inside the furnace Dimensions Width [1,000] mm, Length [1,200] mm, Height [1,500] mm

  Outside dimension Width [2,400] mm, length [2,200] mm, height [2,400] mm

  Material [SS400] - CASING

Refractory insulation material side wall refractory [Refractory brick SK34 115mm]

Insulation [Insulation Brick B-1 115mm, Ceramic Module 50mm]

Ceiling refractory material [Refractory brick SK34 230mm]

Insulation [Insulation Brick B-1 115mm, Ceramic Module 50mm]

Floor refractory material [Refractory brick SK34 115mm]

Insulation [Insulation Brick B-1 115mm, Ceramic Module 50mm]

Casing [outside temperature + 40] ℃ or less

By volume [1.44] m ³

As temperature inside   [850] ℃ Basically expected operation at 650 ℃

As the pressure [-10] mmH ₂ O or less

Amount of exhaust gas at maximum [10] Am ³ / min

Accessory equipment  [Monitoring equipment, temperature measuring equipment, etc.]

  ④ Remarks

 <Combustion method>

  The burned material in the carbon furnace is heated by the indirect heat exchange of the electric heater

  Consideration is given to efficient transfer and improvement of carbonization effect and shortening of carbonization time.

  Temperature and pressure are automatically controlled during operation.

  The operation of the operator is not required and the control operation is performed with the intention of the driver.

  (2) Electric heating systems

  ① Type [indirect heating type]

  ② Quantity [1] Expression

  ③ Specification

  Capacity 380V X 60Hz X3P --- 30Kw

  Material [Heat resistance SS316, RADIANT TUBE 89.1 ø mm X 3 SETS]

   [HEATER, 5 Kw X 6 EA = 30 Kw]

  Accessory [TRANSFORMER 65A] 380V / 80V conversion

  ④ Remarks

  So that the temperature of the carbonization furnace can be controlled by varying the temperature from 500 ° C. to 850 ° C.

  It should be designed and automatically adjusted to maintain the desired temperature within one hour.

(3) Main parts installation

  ① Temperature measurement system    [1]

  ② Pressure measurement system [1]

  ③ Measurement hole and PLANT AIR supply line [1]

  ④ Nitrogen PURGE LINE and additional facilities [1]

[Secondary Carbonization Furnace (10B)]

  It is a facility to drastically reduce the degree of contamination by secondary carbonization of the soil.

 (1) Secondary carbonization furnace

  ① Type [Batch type]

  ② Quantity [1]

  ③ Specification

  Inside the furnace Dimensions Width [1,000] mm, Length [1,200] mm, Height [1,500] mm

  Outside dimension Width [2,400] mm, length [2,200] mm, height [2,400] mm

  Material [SS400] - CASING

* Refractory insulation material side wall refractory [Refractory brick SK34 115mm]

 Insulation [Insulation Brick B-1 115mm, Ceramic Module 50mm]

 Ceiling refractory material [Refractory brick SK34 230mm]

  Insulation [Insulation Brick B-1 115mm, Ceramic Module 50mm]

Floor refractory material [Refractory brick SK34 115mm]

Insulation [Insulation Brick B-1 115mm, Ceramic Module 50mm]

   And is automatically brought into close contact with the inside of the furnace so that the heat and the odor in the furnace are not exposed to the outside

   do.

 Casing [outside temperature + 40] ℃ or less

By volume [1.44] m ³

 As temperature inside   [850] ℃ Basically, operation at 750 ℃ or higher is expected.

As the pressure [-10] mmH ₂ O or less

Amount of exhaust gas at maximum [10] Am ³ / min

 Accessory equipment   [Monitoring equipment, temperature measuring equipment, etc.]

  ④ Remarks

 <Combustion method>

  The exhaust gas in the carbonization furnace is heated by the indirect heat exchange of the electric heater

  Considering the improvement of the pollution reduction effect and the shortening of time.

  Temperature and pressure are automatically controlled during operation.

  The operation of the operator is not required and the control operation is performed with the intention of the driver.

  (2) Electric heating systems

  ① Type [indirect heating type]

  ② Quantity [1] Expression

  ③ Specification

  Capacity 380V X 60Hz X3P --- 30Kw

  Material [Heat resistance SS316, RADIANT TUBE 89.1 ø mm X 3 SETS]

   [HEATER, 5 Kw X 6 EA = 30 Kw]

  Accessory [TRANSFORMER 65A] 380V / 80V conversion

  ④ Remarks

  So that the temperature of the carbonization furnace can be varied through the test from 650 ° C to 850 ° C

  It should be designed and automatically adjusted to maintain the desired temperature within one hour.

 (3) Main parts installation

  ① Temperature measurement system    [1]

  ② Pressure measurement system [1]

  ③ Measurement hole and PLANT AIR supply line [1]

  ④ Nitrogen PURGE LINE and additional facilities [1]

[Inertial Collision Screen (20A, 20B)] (Inertial Collision Dust Removal System)

 Among the low-level wastes, the particulate matter generated by carbonization of the material according to the specifications is classified into primary

 It is a facility to control.

 (1) inertial impact device

  ① Type [Batch type]

  ② Quantity [1]

  ③ Specification

  Collision plate size width [50] mm, length [500] mm, height [500] mm

  Outer shape width [1,000] mm, length [500] mm, height [200] mm

  Material [SS400] - CASING

  [SS316] PYROSCREEN PLATE

  Casing [outside temperature + 40] ℃ or less

By volume [0.1] m ³

  As temperature inside   [850] ℃ Basically expected operation at 650 ℃

As the pressure [-10] mmH ₂ O or less

Amount of exhaust gas at maximum [10] Am ³ / min

  Accessory equipment   [Monitoring equipment, temperature measuring equipment, etc.]

  ④ Remarks

 <Processing method>

  The substance in the carbonization furnace is contained in the exhaust gas generated at the time of carbonization

  It is the facility to remove large dust such as uranium particles first.

  Temperature and pressure are automatically controlled during operation.

  The operation of the operator is not required and the control operation is performed with the intention of the driver.

[Heat exchanging part (21)]

  Quickly cool the combustion exhaust gas discharged from the two-car charger to 210 ° C or less.

  ① Type [Plate type]

  ② Quantity First

  ③ Specification

  rescue [Orthogonal 2-Pass]

  material Casing [SUS304]

   Tube [NAR-305B, SUS304, SUS316L]

  Exchange calories [20,450] kcal

Pressure loss [30] mmH ₂ O

  Wind control Automatic [Control Damper]

Amount of maximum combustion gas [10] Am ³ / min Gas temperature [750] ° C

Maximum air volume [50] Am ³ / min Ambient temperature [31.2] ℃

  Inlet temperature    [750] C

  Outlet temperature    [210] C

  Cleaning cycle    [1] times / year

  Maintenance of equipment [10] years

  ④ Remarks

  The equipment installed on the top of the secondary carbonization furnace is the regeneration of separated dioxins

  By instantly passing through the temperature range, the regeneration of dioxins is prevented

  The installation method is vertical and the structure is not absorbed by Dust.

[Blower (21)]

   (1) Cooling blower

  ① Type [Turboblower]

  ② Quantity [1]

  ③ Specification

Air volume [50] m ³ / min

  Gas temperature [31.2] C

Wind pressure [120] mmH ₂ O

  Required motor [220] V x [4] P x [2.2] Kw

  material Casing [SS400]

Impeller [SS400]

Shaft [S45C]

  Other  [Including cold room for temperature rise]

  ④ Remarks

  This blower is used for cooling the heat exchanger and the heat exchanger

  The remaining residual heat air is reused for prevention of white smoke, thereby saving energy.

  (2) Duct for cooling

  ① Type [Steel plate made by duct]

  ② Quantity [1]

  ③ Specification

  Wind velocity [15] m / sec (maximum)

  material [SS400]

  rescue [Duct duct]

  Accessory equipment [Support]

 (3) Control damper for cooling

  ① Type [Butterfly expression]

  ② Quantity 1 for white smoke prevention, 15 for heat exchanger

  ③ Specification

  Wind velocity [15] m / sec (maximum)

  material [SS400]

  Driving method [Control Motor]

  Operating place [Heat exchanger inlet]

  How to operate [Automatic temperature control]

[Bag filter (30A)]

  ① Type [Back filter]

  ② Quantity [1]

  ③ Specification

* material [SS400]

  Size Width [900] mm, Length [900] mm, Height [3,400] mm

Amount of process gas [10] Am ³ / min, allowance rate [12]%

  Process gas temperature [210] C

Inlet molecule concentration [0.03] ng / Nm ³ (in terms of O ₂ 12%)

Outlet molecular concentration [0.005] ng / Nm ³ (in terms of O ₂ 12%)

  Dust collection efficiency [ over 90

  Particle size [0.1] or less

  Dust collection mistake [1] Thread

  Filtration cloth material [GLASS FIBER cartridge type]

Quantity    [9] Bonnie

Heat resistance temperature [270] ℃

Filtration area [8.9] m ²

  Filtration rate [0.8] m / min

Pressure loss [150] mmH ₂ O

  Dust emission [Rotary valve]

  Fallout method [Pulse Air]

  Cleaning cycle [At the end of the work once / day]

  Use of equipment [10] years

  Emergency By-Pass Damper Duct [Installation]

  Other [Compressor for Pulse Wave]

  <Specifications>

* form [Package Type Rotary Type]

* Quantity [ One ]

   * Specifications

Amount of process gas [1.5] Nm3 / min, allowance rate [12]%

Supply air temperature [31.2 / - 11.2] C

Required motor 220 V x 4 P x 5.5 Kw

part Air Comp. Heater 1,500L

④ Remarks

  It is a compact and high-speed bag filter considering system space.

  In addition, considering the operation of carbonization furnace and characteristics of exhaust gas (minute amount)

  And extends the lifetime of the bag filter by performing after the end.

[Petrol / powder activated carbon supply unit (31A)]

  It primarily removes sulfur oxides, hydrogen chloride and dioxine in the combustion gas.

  (1) Collector

  ① Type [Square box type tank]

  ② Quantity [1]

  ③ Specification

  material    [SS400]

  Size Width [300] mm, length [300] mm, height [500] mm

Amount of process gas [10] Am ³ / min, allowance rate [12]%

  Process gas temperature [210] C

* Inlet molecule concentration [0.04] ng-TEQ / Nm ³ (in terms of O ₂ 12%)

Outlet molecular concentration [0.0015] ng-TEQ / Nm ³ (converted to 12% O ₂ )

  Dust collection efficiency [ over 90

Pressure loss [10] mmH ₂ O

  Cleaning cycle [At the end of work / 1 month]

  Emergency By-Pass Damper Duct [Installation]

  Other    [Lime and powder activated carbon input facility Hydrogen chloride, sulfuric acid,

   For removing some dioxin substances]

  <Specifications>

* form   [Input facility using SCW feeder with constant feed pump]

* Quantity [ One ] ; Lime stone, powder activated carbon storage tank mixed type

   * Specifications

Amount of process gas  [40] Nm3 / min, allowance rate [12]%

   Process gas temperature [210] C

   Required motor  220 V x 4 P x Kw

part Quantity Feeder and High Pressure BLOWER

  ④ Remarks

  Considering the space of crematorium, it is compact and high speed processing equipment.

  Also, considering the operation of make-up furnace and characteristics of exhaust gas (trace amount), automatic operation

  This facility is equipped with a back filter and a slurry / powder activated carbon input facility.

  Operated from the front of the bag filter

(3). Catalyst filter

  It is a facility to remove NOx and dioxine in the combustion gas.

  (1) Collector

  ① Type [ filter ]

  ② Quantity [1]

  ③ Specification

  material    [SS400]

  Dimensions Width [1,000] mm, Length [500] mm, Height [3,400] mm

Amount of process gas [10] Am ³ / min, allowance rate [12]%

  Process gas temperature [210] C

Inlet molecular concentration [0.003] ng-TEQ / Nm ³ (converted to 12% O ₂ )

Outlet molecular concentration [0.0005] ng-TEQ / Nm ³ (in terms of 12% O ₂ )

  Dust collection efficiency [ over 90

  Trap particle size [0.1] [0.1] or less

  Dust collection mistake [1] Thread

  catalyst material [Titanium series]

Quantity [0.4] m ³

Heat resistance temperature [450] ℃

Pressure loss [60] mmH ₂ O

  Cleaning cycle [At the end of work / 1 month]

  Use of catalyst [ 2 years

  Emergency By-Pass Damper Duct [Installation]

  Other [Compressor for Pulse Averaging]

  <Specifications>

        * form [Package Type Rotary Type]

   * Quantity [ One ]

In the above description, conventionally known techniques related to the heat source, the specific operating conditions of the carbonization furnace, the specific specification of the inertia-impact screen, the specific configuration of the filter section, etc. are omitted, but those skilled in the art can easily guess and deduce it.

While the present invention has been described with reference to the accompanying drawings, it is to be understood that the invention is not limited thereto. Various modifications, alterations, and permutations of the present invention may be made by those skilled in the art. And should be construed as falling within the scope of protection of the present invention.

A: Carbonization system 10, 10A, 10B: Carbonization furnace
20A, 20B: inertia impact screen 30: filter section
40: year portion PO: photo-

Claims (4)

A carbonization furnace having a low-level radioactive waste loading section, a discharge section, an exhaust section, a heat source, and a nitrogen supply section;
An inertial impact screen connected to an exhaust portion of the carbonization furnace; And
A filter portion connected to the inertial impact screen;
Wherein the radioactive waste is a radioactive waste. The method according to claim 1,
Wherein the filter unit comprises a bag filter and a low temperature catalytic filter. The method according to claim 1,
Wherein the filter unit is connected to the chemical supply unit. 4. The method according to any one of claims 1 to 3,
The carbonization furnace is composed of a first coal char combustion furnace and a second coal furnace which are connected to each other,
Wherein the inertial impact screen is composed of a primary screen and a secondary screen provided at a rear end of the exhaust part of each carbonization furnace.

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