Development of Electric Steam Type Dryer for Radiation Controlled Area

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Development of Electric Steam Type Dryer for Radiation Controlled Area

Development of Electric Steam Type Dryer for Radiation Controlled Area

2010. 07 2010. 07

ILJIN Radiation Engineering Co., LtdILJIN Radiation Engineering Co., Ltd

PresentatioPresentatio

nn

PresentatioPresentatio

nnⅠⅠ. . IntroductionIntroduction

ⅡⅡ.. Main subjectMain subjectPerformance of the current working clothes dryer and Performance of the current working clothes dryer and its defectits defect11

Development of Electric Steam type dryerDevelopment of Electric Steam type dryer22

Development effect of Electric Steam type dryerDevelopment effect of Electric Steam type dryer33

Extended suggestions in development of Electric Steam Extended suggestions in development of Electric Steam type dryertype dryer44

ⅢⅢ.. ConclusionConclusion2

3

Ⅰ Ⅰ.. IntroductionIntroduction

Several troubles were incurred due to insufficientSeveral troubles were incurred due to insufficient

performanceperformance of the dryer for the radiation controlled area goods of the dryer for the radiation controlled area goods is not enough.is not enough.

Improving the drying performance and supplying the Improving the drying performance and supplying the

effective workingeffective working Parallel development focusing on the decrease of evelopment focusing on the decrease of

radioactive wasteradioactive waste amount generated by abrasion and damageamount generated by abrasion and damage

4

Washing : 30 min, drying : 70 minWashing : 30 min, drying : 70 min

Waiting time similar to a planning overhaulWaiting time similar to a planning overhaul

IncreasedIncreased abrasion and damage due toabrasion and damage due to long washing timelong washing time

Washing : 30 min, drying : 70 minWashing : 30 min, drying : 70 min

Waiting time similar to a planning overhaulWaiting time similar to a planning overhaul

IncreasedIncreased abrasion and damage due toabrasion and damage due to long washing timelong washing time

Long time to dry fabricsLong time to dry fabrics

Problems from the dust Problems from the dust filterfilter

Reduced hat air circulation effect due toReduced hat air circulation effect due to accumulated dustaccumulated dust Waiting time similar to a planning overhaulWaiting time similar to a planning overhaul DecreasedDecreased performance of filter system dueperformance of filter system due to cloggingto clogging Risk of air pollution's spreadingRisk of air pollution's spreading

Reduced hat air circulation effect due toReduced hat air circulation effect due to accumulated dustaccumulated dust Waiting time similar to a planning overhaulWaiting time similar to a planning overhaul DecreasedDecreased performance of filter system dueperformance of filter system due to cloggingto clogging Risk of air pollution's spreadingRisk of air pollution's spreading

Performance of the current working clothes dryer Performance of the current working clothes dryer and its defectsand its defectsPerformance of the current working clothes dryer Performance of the current working clothes dryer and its defectsand its defects

ⅡⅡ.. Main subjectMain subject

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Lowered system's performance byLowered system's performance by evaporated moistureevaporated moisture

Possibility of worker's internal exposurePossibility of worker's internal exposure when workingwhen working

Frequent malfunctions and too low fuelFrequent malfunctions and too low fuel efficiency (too high fuel cost)efficiency (too high fuel cost)

Electric Heater type on the declineElectric Heater type on the decline

Lowered system's performance byLowered system's performance by evaporated moistureevaporated moisture

Possibility of worker's internal exposurePossibility of worker's internal exposure when workingwhen working

Frequent malfunctions and too low fuelFrequent malfunctions and too low fuel efficiency (too high fuel cost)efficiency (too high fuel cost)

Electric Heater type on the declineElectric Heater type on the decline

Other troublesOther troublesSystem drawingsSystem drawings

1 time moisture amount1 time moisture amount

Performance of the current working clothes dryer Performance of the current working clothes dryer and its defectsand its defectsPerformance of the current working clothes dryer Performance of the current working clothes dryer and its defectsand its defects

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Development of Electric Steam type dryerDevelopment of Electric Steam type dryerDefects in Electric Heater hot air Defects in Electric Heater hot air circulation typecirculation type

Insufficient hot air Insufficient hot air circulation due to adherance circulation due to adherance of clothes to the perforated of clothes to the perforated plateplate

Most hot air is exhausted Most hot air is exhausted after just heating the after just heating the surface of Basketsurface of Basket

IncreasedIncreased abrasion and abrasion and damage on the wdamage on the working orking clothesclothes

Increased drying timeIncreased drying time

Heating and Heating and steamingsteaming type type dryer from abroad are similardryer from abroad are similar

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Improved Electric SteamImproved Electric Steam hot air hot air circulation typecirculation type

①

②

③ Chilly wind/vent Damper isChilly wind/vent Damper isopened if drying is opened if drying is completed bycompleted byhumidity control systemhumidity control system

Installed heat exchanger at Installed heat exchanger at the latterthe latterpart of Basketpart of BasketInstalled Vent DamperInstalled Vent Damper

Chilly wind/vent Damper is Chilly wind/vent Damper is closed during operationclosed during operation..Warm wind Damper is closed if Warm wind Damper is closed if it it reaches the saturated level of reaches the saturated level of waterwatervapor pressure by hot air vapor pressure by hot air circulationcirculation

Development of Electric Steam type dryerDevelopment of Electric Steam type dryer

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Main point No. 1 in hot air circulation technology Main point No. 1 in hot air circulation technology developmentdevelopment

1.1. Installed heat exchanger at the latter Installed heat exchanger at the latter part of Basketpart of Basket1.1. Installed heat exchanger at the latter Installed heat exchanger at the latter part of Basketpart of Basket

2. Changed design so that hot air can circu-Changed design so that hot air can circu- late inside the Basketlate inside the Basket2. Changed design so that hot air can circu-Changed design so that hot air can circu- late inside the Basketlate inside the Basket

3. Installed Vent Damper so that hot air and Installed Vent Damper so that hot air and steam can not escape at oncesteam can not escape at once3. Installed Vent Damper so that hot air and Installed Vent Damper so that hot air and steam can not escape at oncesteam can not escape at once


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1.1. Warm wind Damper of heat exchanger Warm wind Damper of heat exchanger is closed if it reaches the proper satur-is closed if it reaches the proper saturated water vapor pressure.ated water vapor pressure.

2. Minimizing heat lossMinimizing heat loss

1.1. Warm wind Damper of heat exchanger Warm wind Damper of heat exchanger is closed if it reaches the proper satur-is closed if it reaches the proper saturated water vapor pressure.ated water vapor pressure.

2. Minimizing heat lossMinimizing heat loss

3.3. Installed internal sensor to maintainInstalled internal sensor to maintain

precise temperature and humidityprecise temperature and humidity

3.3. Installed internal sensor to maintainInstalled internal sensor to maintain

precise temperature and humidityprecise temperature and humidity


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1.1. Amount of loading fabrics =Amount of loading fabrics =Amount of steam in the dryerAmount of steam in the dryer

2. Humidity control is important to keepHumidity control is important to keepsteam amount constantsteam amount constant

1.1. Amount of loading fabrics =Amount of loading fabrics =Amount of steam in the dryerAmount of steam in the dryer

2. Humidity control is important to keepHumidity control is important to keepsteam amount constantsteam amount constant

3.3. Installed control system so that it canInstalled control system so that it canwork properly according to the operationwork properly according to the operationconditioncondition

3.3. Installed control system so that it canInstalled control system so that it canwork properly according to the operationwork properly according to the operationconditioncondition


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1.1. Chilly air damper on the upper part is Chilly air damper on the upper part is opened if drying is completed.opened if drying is completed.2. Vent damper is opened at the same Vent damper is opened at the same time.time.

1.1. Chilly air damper on the upper part is Chilly air damper on the upper part is opened if drying is completed.opened if drying is completed.2. Vent damper is opened at the same Vent damper is opened at the same time.time.

3. Chilly air period is minimized.Chilly air period is minimized.

4. Dried state is good without wrinkle.Dried state is good without wrinkle.

3. Chilly air period is minimized.Chilly air period is minimized.

4. Dried state is good without wrinkle.Dried state is good without wrinkle.


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RecoveringRecovering systemsystem of waste of waste heatheat(superconducting heat pipe) (superconducting heat pipe) is applied to Electric Steam is applied to Electric Steam dryerdryer

Recovered waste heat isRecovered waste heat iscirculated from the circulated from the beginning of drying to the beginning of drying to the endend

Consumption of electric Consumption of electric power :power :decreases by 60%.decreases by 60%.Drying time : decreases by Drying time : decreases by 50%.50%.


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1.1. Condensed water outlet is installedCondensed water outlet is installed at the side face of the vent holeat the side face of the vent hole1.1. Condensed water outlet is installedCondensed water outlet is installed at the side face of the vent holeat the side face of the vent hole

2.2. Installed filter for blocking steam/Installed filter for blocking steam/ discharging condensed waterdischarging condensed water2.2. Installed filter for blocking steam/Installed filter for blocking steam/ discharging condensed waterdischarging condensed water


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Evaluation of Electric Steam type Evaluation of Electric Steam type washer & dryerwasher & dryer

• Washing and spin-drying of pollution-free Washing and spin-drying of pollution-free working clothsworking cloths from radiation controlled area from radiation controlled area• Pollution inspection/Transfer preparationPollution inspection/Transfer preparation

• Keep moisture from evaporating by using Keep moisture from evaporating by using vacuumedvacuumed pack, etc. pack, etc.• Being transferred to the company with ice-Being transferred to the company with ice-box packingbox packing

• Drying working clothes by using electric Drying working clothes by using electric steam dryersteam dryer• Checking the drying time and the dried Checking the drying time and the dried statestate


(required time for completing dry after washing and spin-drying)

Comparison of drying time and the Comparison of drying time and the dried statedried state

60min

30min

20min

Electric

Steam

If same period is If same period is applied,applied,in case of Heater in case of Heater type, thetype, theremained moisture is remained moisture is foundfoundin some places such in some places such asaspickpocket, collar, pickpocket, collar, etc.etc.

70min30 ㎏ (24set)

80min50 ㎏ (40set)

Heater type requires Heater type requires 20 20 min. for pre-heating.min. for pre-heating.

40min10 ㎏ ( 8set)

비 교Electric

Heater

방 식 건 조 량

TypeType DriedDried amountamount

Electric Heater

Electric Steam

ComparisonComparison


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Kind of dust filter and change order & Kind of dust filter and change order & Test 1Test 1

1.1. Current 5 mm dust filter and vent holeCurrent 5 mm dust filter and vent hole1.1. Current 5 mm dust filter and vent holeCurrent 5 mm dust filter and vent hole2. Newly designed 5μm screen dust filterNewly designed 5μm screen dust filter2. Newly designed 5μm screen dust filterNewly designed 5μm screen dust filter


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1. Outlet for sampling is installed at the Outlet for sampling is installed at the

vent hole behind the two kinds of dustvent hole behind the two kinds of dust

filtersfilters

1. Outlet for sampling is installed at the Outlet for sampling is installed at the

vent hole behind the two kinds of dustvent hole behind the two kinds of dust

filtersfilters

2. Air pollution degree is measured/Air pollution degree is measured/

analyzed with the same conditionanalyzed with the same condition

during operationduring operation

2. Air pollution degree is measured/Air pollution degree is measured/

analyzed with the same conditionanalyzed with the same condition

during operationduring operation


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Kind of dust filter and change order Kind of dust filter and change order & Test 3& Test 3

Frequency

Method

1 2 3 4 5 6 7 8 9 10

5mm 0.272 0.213 0.196 0.173 0.257 0.158 0.284 0.184 0.149 0.231

5µm 0.094 0.085 0.088 0.064 0.082 0.102 0.108 0.073 0.058 0.114

( 단위 : ㏃ / ㎤ )

(dust filter air pollution degree dust filter air pollution degree comparison tablecomparison table)


Sample collection period is complete clrying before 20 minutes and sample collect 10 minutes by same method

New filter’s air contamination reduction effect is more 50% than that of current dust filter(5 ㎜ )

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(dust filter air pollution degree dust filter air pollution degree comparison graphcomparison graph)


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1. State of the inside-remained dust State of the inside-remained dust after removing the dust filterafter removing the dust filter1. State of the inside-remained dust State of the inside-remained dust after removing the dust filterafter removing the dust filter

2.2. Nuclide analysis after collecting Nuclide analysis after collecting the remained dustthe remained dust2.2. Nuclide analysis after collecting Nuclide analysis after collecting the remained dustthe remained dust


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(remained dust nuclide analysis tableremained dust nuclide analysis table)

Nuclide Method

Mn-54 Co-58 Co-60 Total

5mm 1.55E+01 5.83E+00 1.63E+02 1.85E+02

5µm N/D 4.13E+00 5.05E+00 9.10E+00

( 단 위 :㏃ /g)

It depends on the dried material, but, if seeing the nuclide analysis result during It depends on the dried material, but, if seeing the nuclide analysis result during

development period, in case of changing the dust filter, it shows that it decreasesdevelopment period, in case of changing the dust filter, it shows that it decreases

by more than 50% than before.by more than 50% than before.


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(remained dust nuclide analysis comparison tableremained dust nuclide analysis comparison table)

1.55E+01

0.00E+00

5.83E+004.13E+00

1.63E+02

5.05E+00

1.85E+02

9.18E+00

1.00E-01

1.00E+00

1.00E+01

1.00E+02

1.00E+03

Mn-54 Co-58 Co-60 Total

5mm 5µm (Unit:Unit: ㏃ /g)


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Kind of dust filter and change order Kind of dust filter and change order & Test 8& Test 8

1.1. Side view of the current type dust filterSide view of the current type dust filter1.1. Side view of the current type dust filterSide view of the current type dust filter2. Figure of fiber dust accumulated onFigure of fiber dust accumulated on the filterthe filter2. Figure of fiber dust accumulated onFigure of fiber dust accumulated on the filterthe filter


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It is not easy to remove It is not easy to remove frequentlyfrequently

It is required to stop It is required to stop drying drying temporarily.temporarily.

Interruption of hot air Interruption of hot air circulationcirculation

dryer's performance isdryer's performance is decreased decreased

Inflammable fiber dustInflammable fiber dust High fire risk during igh fire risk during operationoperation

Removing the dust inside Removing the dust inside the the machinemachine

Exposed to the internal xposed to the internal exposureexposure


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1.1. Side view after the improved dustSide view after the improved dust filter is installedfilter is installed1.1. Side view after the improved dustSide view after the improved dust filter is installedfilter is installed

2. State of the dust inside the newlyState of the dust inside the newly made dust filtermade dust filter2. State of the dust inside the newlyState of the dust inside the newly made dust filtermade dust filter


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Making dust go down before/after hot air circulation by 45° Making dust go down before/after hot air circulation by 45° installing in the installing in the opposite directionopposite direction

Screen mesh(T-No), which has excellent safety/strength in Screen mesh(T-No), which has excellent safety/strength in heat resistanceheat resistance /expansibility, is applied/expansibility, is applied

The dried state is excellent because of the smooth hot air The dried state is excellent because of the smooth hot air circulationcirculation

Easy dust removal by the installed collector on the lower Easy dust removal by the installed collector on the lower part of the filterpart of the filter


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No.1 compensation of the current dryer's No.1 compensation of the current dryer's defectsdefects

Standard V belt inside the machine Standard V belt inside the machine

is cut off frequently because of itsis cut off frequently because of its

weakness propertyweakness property

Standard V belt inside the machine Standard V belt inside the machine

is cut off frequently because of itsis cut off frequently because of its

weakness propertyweakness property

Combined V belt, which can be usedCombined V belt, which can be used

semi-permanently, is applied.semi-permanently, is applied.

Figure before installing inside the Figure before installing inside the

machinemachine

Combined V belt, which can be usedCombined V belt, which can be used

semi-permanently, is applied.semi-permanently, is applied.

Figure before installing inside the Figure before installing inside the

machinemachine


Hybrid V belt

Standard V belt

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Installed inter-lock device, safety Installed inter-lock device, safety

Device, at sliding door so that the Device, at sliding door so that the

basket is stopped when the door basket is stopped when the door

is opened randomlyis opened randomly

Installed inter-lock device, safety Installed inter-lock device, safety

Device, at sliding door so that the Device, at sliding door so that the

basket is stopped when the door basket is stopped when the door

is opened randomlyis opened randomly

Planarization of the screws so that thePlanarization of the screws so that the

abrasion by the inside-projections can abrasion by the inside-projections can

be minimized be minimized

Planarization of the screws so that thePlanarization of the screws so that the

abrasion by the inside-projections can abrasion by the inside-projections can

be minimized be minimized


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Current dryer is all-in-one, so it is Current dryer is all-in-one, so it is

not easy to transfer and dismantlenot easy to transfer and dismantle

for repairing. for repairing.

(Figure after main body is dismantledFigure after main body is dismantled)

Current dryer is all-in-one, so it is Current dryer is all-in-one, so it is

not easy to transfer and dismantlenot easy to transfer and dismantle

for repairing. for repairing.

(Figure after main body is dismantledFigure after main body is dismantled)

Being changing it to built-up-type toBeing changing it to built-up-type to

make maintenance easymake maintenance easy

(Assembled part by screw at mainAssembled part by screw at main

body's edgebody's edge)

Being changing it to built-up-type toBeing changing it to built-up-type to

make maintenance easymake maintenance easy

(Assembled part by screw at mainAssembled part by screw at main

body's edgebody's edge)


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Trial test No.1 on removing the particulate Trial test No.1 on removing the particulate pollutionpollution

• Evaluating the removal degree of the particulate pollution, which exists Evaluating the removal degree of the particulate pollution, which exists between fibers, by using drierbetween fibers, by using drier

• Proving that the particulate pollution degree can be decreased as waterProving that the particulate pollution degree can be decreased as water vapor is extracted and reacts as a mixed gas after reacting with the vapor is extracted and reacts as a mixed gas after reacting with the water-contained particlewater-contained particle

Purpose of Trial Purpose of Trial testtest

• Gypsum coating on 10cm×10cm of washed/pin-dried 5 working Gypsum coating on 10cm×10cm of washed/pin-dried 5 working clothes respectivelyclothes respectively

• Drying after it is applied equally to the current heater type and Drying after it is applied equally to the current heater type and steam typesteam type

Trial test Trial test methodmethod


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Trial test procedure and result

Picture after coating on the site-protective

clothingCoated part enlarged picture Picture after being dried by heater type

Picture after being coated by the company

Coated part enlarged picture Picture after being dried by steam type


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• The removal degree of gypsum pack can not be identified visuallyThe removal degree of gypsum pack can not be identified visually

• In case of site-heater type, the result was secured after 40 min. drying,In case of site-heater type, the result was secured after 40 min. drying,

and in case of steam type, the result was secured after 17 min. dryingand in case of steam type, the result was secured after 17 min. drying

• If considering the completely dried time, it is expected to remove theIf considering the completely dried time, it is expected to remove the

particulate pollutionparticulate pollution

Trial test Trial test resultresult


Division

Treated amount(kg)

when operating 8 hrs

1 time cost(won)

annual operation cost(won)

Electric Heater50Kg 368 1,729 6,003,339

Electric Heater80Kg 521 2,882 9,465,311

Electric Steam 549 988 4,875,753

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Tangible effect Tangible effect No. 1No. 1

Economical effectEconomical effect (individual performance comparisonindividual performance comparison)Economical effectEconomical effect (individual performance comparisonindividual performance comparison)

See the data of Korea Textile Machinery Research InstituteSee the data of Korea Textile Machinery Research InstituteSee the data of Korea Textile Machinery Research InstituteSee the data of Korea Textile Machinery Research Institute

Development effect of Electric Steam type dryerDevelopment effect of Electric Steam type dryer

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Economical effectEconomical effect(performance comparison when the same amount is treated, 549Kgperformance comparison when the same amount is treated, 549Kg)

Economical effectEconomical effect(performance comparison when the same amount is treated, 549Kgperformance comparison when the same amount is treated, 549Kg)

DivisionDivision, 1 day/require

d time

monthly gas cost

(won)

annual operation cost(won)

Electric Heater50Kg 11.9 745,756 8,949,076

Electric Heater80Kg 8.4 830,909 9,970,911

Electric Steam 8 406,313 4,875,753


See the data of Korea Textile Machinery Research InstituteSee the data of Korea Textile Machinery Research InstituteSee the data of Korea Textile Machinery Research InstituteSee the data of Korea Textile Machinery Research Institute

35


If they are compared with the consumed electric energy simply, the errorIf they are compared with the consumed electric energy simply, the error can be generated in accuracycan be generated in accuracy If they are compared with the consumed electric energy simply, the errorIf they are compared with the consumed electric energy simply, the error can be generated in accuracycan be generated in accuracy

By the same level's amount standard, the accumulated cost is the new By the same level's amount standard, the accumulated cost is the new dryer's price if it is used for more than 3 yearsdryer's price if it is used for more than 3 years By the same level's amount standard, the accumulated cost is the new By the same level's amount standard, the accumulated cost is the new dryer's price if it is used for more than 3 yearsdryer's price if it is used for more than 3 years

• Drying time can be shorten remarkably by improving the hot airDrying time can be shorten remarkably by improving the hot air circulation methodcirculation method

• Unnecessary waiting time can be reducedUnnecessary waiting time can be reduced

• Damage and abrasion of working clothes are reducedDamage and abrasion of working clothes are reduced

Drying time of working clothes is shortenedDrying time of working clothes is shortened(30~40%) Drying time of working clothes is shortenedDrying time of working clothes is shortened(30~40%)


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Intangible effect Intangible effect No. 1No. 1

• the air pollution degree is decreased by using the newly the air pollution degree is decreased by using the newly

manufactured dust filter (5μm)manufactured dust filter (5μm)

• Dryer's fire risk and operator's internal exposure risk areDryer's fire risk and operator's internal exposure risk are

decreased by the improved dust filterdecreased by the improved dust filter

• Working surrounding is improved because hot air and chill air Working surrounding is improved because hot air and chill air

are circulated inside the dryerare circulated inside the dryer

• Air circulation system's wholesomeness is maintained by Air circulation system's wholesomeness is maintained by

collecting the water generated during dryingcollecting the water generated during drying

Improved working surrounding by improving the dust filterImproved working surrounding by improving the dust filter Improved working surrounding by improving the dust filterImproved working surrounding by improving the dust filter

Improved hot air circulation method and water collection methodImproved hot air circulation method and water collection method Improved hot air circulation method and water collection methodImproved hot air circulation method and water collection method


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Intangible effect Intangible effect No. 2No. 2

• Using Hybrid V belt instead of standard V belt being cutUsing Hybrid V belt instead of standard V belt being cut off frequentlyoff frequently

• Safety is emphasized by installing the basket stop switchSafety is emphasized by installing the basket stop switch on the sliding dooron the sliding door

• Working clothes damage is minimized by minimizing theWorking clothes damage is minimized by minimizing the projectsprojects

• Designed as a built-up-type to make dismantle and Designed as a built-up-type to make dismantle and maintenance easymaintenance easy

Compensation of the current dryer's defectsCompensation of the current dryer's defects Compensation of the current dryer's defectsCompensation of the current dryer's defects


38

Extended suggestion Extended suggestion

• In any water contained laundry, it is possible to dry without the damage byIn any water contained laundry, it is possible to dry without the damage by

heat because it is not heater but steam typeheat because it is not heater but steam type

• Cotton gloves and cotton socks from radiation controlled area can be driedCotton gloves and cotton socks from radiation controlled area can be dried

perfectly without deformation perfectly without deformation

• Being testing on the proper temperature and saturated humidity in order toBeing testing on the proper temperature and saturated humidity in order to

be applied to the recycling protectors such as rubber gloves, rag forbe applied to the recycling protectors such as rubber gloves, rag for

removing pollution, etcremoving pollution, etc

Enlarging the using of the developed dryerEnlarging the using of the developed dryerEnlarging the using of the developed dryerEnlarging the using of the developed dryer

Extended suggestions in development ofElectric Steam type dryer

Extended suggestions in development ofElectric Steam type dryer

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Ⅲ Ⅲ.. ConclusionConclusion

Working surrounding is improved by the Working surrounding is improved by the shortened working shortened working clothes drying time.clothes drying time.

Working clothes' abrasion and damage are Working clothes' abrasion and damage are minimized.minimized.

The particulate pollution is prevented by the The particulate pollution is prevented by the improvement improvement of the filter.of the filter.

The improvement of protecting equipment in the The improvement of protecting equipment in the radiation radiation controlled area is led by preventing fire risk.controlled area is led by preventing fire risk.

ILJIN Radiation Engineering Co., Ltd

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Development of Electric Steam Type Dryer for Radiation Controlled Area

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