➔ Improve Dedusting & Dedust Long Bag

Pressed Air

Air Inflow

Pressed air is amplified approximately 8 times by CK Injector

3. 1st inflow of air

Amount of air flow is amplified by the 1st inflow of air from surroundings caused by pressed air injection.

1. Pressed air is supplied

Air is supplied by pneumatic controller of the compressor

2. Injection of the pressed air

Pressed air is injected through the specially designed slit of CK Injector

4. 2nd inflow of air

Amplified pressed air flows into bag filter and the 2nd inflow of air is supplied from the surroundings

3

- Increase of Differential Pressureby Bag Filter Blockage→ Interruption of Production Line

- Waste of Compressed Air→ Increase of Maintenance Cost

- Inconvenience of Frequent Bag Filter Replacement→ Increase of Maintenance Expenses,

Decrease of Production Dfficiency

- Toxic Working Environment→Work Efficiency Loss

➔ Productivity Loss

4

0

2

4

6

8

10

12

0.1 0.2 0.3 0.4 0.5 0.6

분사속도

m/sec

일차공기압 MPa

CK인젝터성능특성

CK-1 8c CKI-28 8c CKI-75 8c CKI-43 8c Vent

≪CONDITION≫・Pulsed Valve : 40A CKD・Test Fabric Filter : Φ165 Polyester Felt・Position of Wind Velocity : 10000mm from Filter Entrance・Pulse On-time : 0.1sec・Receiver Tank : 200L

<New Product : CKI-28,43,75>

<Existing Product : CK-1>

<Existing Blow Tube + Venturi>

Patent (Korea, China, Japan)

NO PATENT TITLE DESCRIPTION REGISTRATION NO. FILING DATEREGISTRATION

DATEAPPLICATION NO. REMARK

1 KOREA

Compressed Air Injector by Air

Amplifier

Improvement of Bag Filter

performance by CK Injector

10-0308721 2006/11/01 2008/02/05 2006-0107386 Patented

2 JAPAN 4413241 2007/03/12 2009/11/27 2007-061556 Patented

3 CHINA 762583 2007/03/15 2011/04/20ZI. 2007 I

0005696.7Patented

Korea ChinaJapan

- Reference

•POSCO Pohang, POSCO Chemtech(Pohang, Gwangyang), Gwangyang Steel Mill, POSCO Specialty Steel, Hyundai Heavy Industry, Hyundai Steel, Dongbu Steel, OCI, Koreazinc, POHANG Electric Furnace Bag Filter, Dongbu Metal, Samung P&A, Seah Besteel, STX O&S

Steel Industry

•Secheon Thermal Power Plant, Hadong Thermal Power PlantThermal Power Plant, Taean Thermal Power Plant

Power Plant

•Dongyang Cement, Hanil Cement, Hyundai Cement, Ssangyong Cement, Asia Cement, Halla Cement, Union Cement, KUMBI

Cement, Lime, Plaster

•LG Chem(Daesan, Yeosu PVC, ABS, MMA, MBS, BPA, PP), KS Chem, SK Energy, KUMHO Petrochemical, Hanwha Chemical, HOC Daesan

Petrochemical Industry

•Goseong, Gimhae, Pocheon, Suwon, Yeongam, Wando

Incinerator

•CJ, CJ Lion, Daesang, Dongsuh, Jeonjupaper, Ssangyong C&B, Dongilpaper, Jaewonpaper, Nonghyup Feed,

•Cargill Feed(Purina Feed)

Food, Paper, Feed Industry

•CHINA, JAPAN, TAIWAN, MALAYSIA, INDONESIA, USA, MEXICO

Export

● Posco (CK Injector Remodeling)

▶ 40A x 20C – 504 Sets▶ 50A x 22C – 200 Sets

Posco

SEOCHEON Thermal Power Plant ● SEOCHEON Thermal Power Plant 2nd Facility

▶ 240,000m3/min

▶ Air Quality Standards Satisfaction

S Steel : newly installed dust collector for electric furnace

CK 43S-15C（medium） 12 rows× 8 rooms 1440ea.Air flow : 7000㎥/ min.Used Filter : Φ156× 9000mm

Differential Pressure 30days after operation : 50mmAq

Space only takes up half of what used to be before remodeling

CKI 43S 15C 50A

Bag filter Remodeling for Coal Mill

Before Remodeling After Remodeling

Lifespan of Filter 15 months Minimum 30 months

DifferentialPressure for

Filter Bag200mmAq or above 120mmAq

Pressure of pressed air

5kg/cm2 5kg/cm2

Pulsing Cycle 3~4 seconds 20 seconds

Filter Lifespan 12 months Minimum 30 months

Effect Air flow / productivity increased by 30%

ROI 1.3 years

Conventional Bag Filter :

Process Dust Injection Type

Coal Mill Coal DustConventional Injection System

• Status Quo : Increase of differential pressure for bag filter → Production rate is decreased / Excessive consumption of pressed air / Need for increase in production amount

• Remodeling : Exchange the blow tube with CK Injector ; Conventional VENTURI is integral with cage

<Conventional blow tube>

<CK INJECTOR>

Process Dust Injection System

Pulse Valve Filter Speed Filter Bag Designed Air Flow

Bag Cage Filter Bag Material

Sampling Smoke and dust from

electric furnace

Zinc and Steel Dust

General Injection System

40A(21ea.) 1.35m/min D156x2400L(210ea.)

350m3/min. VENTURIcombination

type

PE

Before Remodeling After Remodeling

Lifespan of Filter 12 months Minimum 24 months

Differential Pressure for Filter Bag

300mmAq or above 120mmAq

Pressure of pressed air 6kg/cm2 5kg/cm2

Operation MethodStop the air blower and start de-dusting when the

differential pressure reaches 200mmAqContinuous Process

Effect Air flow / productivity increased by 50%

ROI 1.7 years

• Status Quo : Increase of differential pressure for bag filter → air blower being stopped everyday, causing forced de-dusting

Bag filter Remodeling for Melting FurnaceConventional Bag Filter :

Comparison Chart

Item Conventional Injection C K Injection

Filter Size D156x3000 D156 x5670

Installation Place Floor Roof top

Additional construction for DUCT

High Construction cost No construction cost

No. of total Filters 2300EA 1200EA

Installation Space 2800 x 7260 1500x 7260

Filter Pitch 250x250 250x250

Comparison Chart

Item Conventional Injection C K Injection

No. of Pulse Valves 230EA 120EA

Blow Tube Size 50A 50A

Blow Tube Type 10C 10C

Pulsing Pressure 6Kg/cm2 5kg/cm2

Consumption of pressed air 800m3/hr 480m3/hr

Process Dust Injection System

PulseValve

FilterSpeed

Filter Bag Designed Air Flow

Bag Cage Filter Bag Material

Process Dust

Back-end of Furnace

After demolishing

electric furnace

Ash dust and gas

CK Injection System

50A(120 ea.)

50A(120ea.)

D156x5670L (1200

ea.)

230X230 Snap Ring Nomex 4300Am3/min

12

• Status Quo / Bottom Line for Designing : Demolish the electric furnace due to environment regulation. Install bag filter using the CK Injector System. Installation place should be the existing rooftop, minimizing the manufacture cost.

<Electric Furnace before demolishment>

<Installation of Bag Filter>

<Body and Hopper of Bag Filter>

<Bag filter after installation>

Bag filter Remodeling for Lime(NEW)Conventional Bag Filter :