2 Rotary High speed rotating wheel (10,000~20,000RPM) inside

Atomizer Rotary Atomizer sprays chemicals and coolants in the

form of fine droplets to enhance reactivity. Fine particle
System size increases reaction efficiency, while circular
Rotary Atomizer

Casing
Gas Treatment Systems
spraying at high RPM facilitates contact with acid
gases (HCl, HF, SO2). OUT
IN

• Rotary atomizer System

A Global Leader
Head Office
160-1 Donggyo-dong, Mapo-gu, Seoul, 121-817, Korea
21 George St, Birmingham, B3 1QQ, England
TEL +44.121.214.1300
in Air Pollution Control
TEL +82.2.320.6114 FAX +44.121.200.2555 - People & Technology keeping our planet sustainable...
FAX +82.2.320.6100 www.lodgecottrell.com
www.kc-cottrell.com
Factory
• Gwangyang Ferronickel Plant • Rotary Atomizer Installation 253 Singi-ri, Seoun-myeon, Anseong-si, Gyeonggi-do, 2319 Timberloch Place, Suite E, The Woodlands,
456-853, Korea TX, 77380, USA
TEL +82.31.674.9660 TEL +1.281.465.9498
FAX +82.31.674.9670 FAX +1.281.465.9366
Advantages Projects www.lodgecottrell.com
- Particle size adjustment enhances reactivity, - Gwangyang Ferronickel Plant, POSCO, Korea (2007)
leading to lower chemical usage - Goyang Branch, Korea District Heating Corporation, Korea (2007) No.9576 Donghuancheng Rd., Changchun Economy &
- Compact size and easy maintenance Development Zone, Changchun City, Jilin Province, 7F Park Centra Tower-B, 32nd Milestone, NH8,
130033, P.R. China Sec.30, Gurgaon Haryana 122001, India
TEL +86.431.8587.7500 TEL +91.124.331.5278
FAX +86.431.8587.7522 FAX +91.124.331.5277
www.cckc.com.cn

3 Atomizing In designing a semi-dry reactor featuring a dual fluid

Spray Dryer nozzle, the most important point is to maintain
consistent gas flow inside the reactor and to evenly Floor 6, VINAFCO building, No.36 Pham Hung street,
System inject sorbent into the gas flow. Tu Liem District, Ha Noi, Viet Nam
TEL +84.4.768.9904/5
The dual fluid nozzle, which plays a key role in boosting FAX +84.4.768.9902
removal efficiency, has superior spraying performance
than the one fluid nozzle. In addition, the droplets
sprayed have uniform particle size. 15F-7, No.77, Sec.1, Shintai 5th Rd., Shijr City,
• KCES incinerator (Far East World Center) Taipei, 221 Taiwan
TEL +886.2.2698.8139
FAX +886.2.2698.8179
Projects
- Sunglim Oil & Chemical Company, Korea (2003) Room1002 Tianheng Bldg, No.46 Dongzhimenwai Rd.,
- KCES incinerator, Korea (2001) DongchengQu, Beijing, 100027, P.R.China
- Guri incineratior, Korea (1999) TEL +86.10.8460.8738/9
- Gunpo incineratior, Korea (1998) FAX +86.10.8460.8732
 A Global Leader in Air Pollution Control
Wet FGD System Semi-Dry Reactor System - People & Technology Keeping Our Planet Sustainable..

2
Sulfur oxide (SOx) emitted during the burning of fuel is highly toxic and causes acid rain. Wet Mg/Na The wet scrubbing method using the Moretana Plate and magnesium hydroxide (Mg(OH)2) or sodium In a GSA system, dust particles from flue gas, reaction products, and alkaline chemicals fed into the

1 Wet
Limestone-
Gypsum
Process
It is generated by facilities that burn fuel containing sulfur, such as coal and oil.

The wet limestone-gypsum process uses a wet scrubber to remove SOx from flue gas. Limestone or
FGD Process hydroxide (NaOH) accounts for more than 51% of the Japanese market and 90% of the Taiwanese
market. An optimal process with a proven track record, it uses Mg(OH)2 or NaOH solutions to
circulate flue gas from boilers to remove SO2 and dust through gas-liquid contact.
1 GSA
Technology
(Fluidized
system and floating inside the reactor. They get in contact with flue gas to remove various pollutants with
high efficiency.

slaked lime is used as sorbent. As the sorbent reacts with SOx, gypsum is generated as a byproduct. The Technique) The dust concentration inside the GSA system reactor is
discharged gypsum is recycled to make gypsum board or cement. Higher SO2 removal efficiency can be achieved by increasing the pH and SO3 2- levels of the sorbent. 50 to 100 times higher compared to conventional
The higher the pH level, the sharper the decline in the solubility of MgSO3. Due to this phenomenon, reactors. The surface of each dust particle is coated with
SO2 is removed from flue gas in the absorber or scrubber tower using limestone slurry. sedimentation of MgSO3 may occur. To prevent clogging caused by sedimentation and to optimize alkaline chemicals which are injected into the reactor
The absorbed SO2 is oxidized in the absorber sump to form marketable calcium sulfate crystals (gypsum). desulfurization, it is important to control the pH and SO3 2- levels of the sorbent. The optimal level is either in the form of a slurry or solid. The coated dust
The pH level in the absorber sump, which changes depending on the quantity of SO2 removed in the determined by the exit SO2 concentration from the absorber. particles come into contact with acidic pollutants such as
absorber, is controlled by adding limestone slurry. This enables continuous production of high purity gypsum. SOx, HF and HCl to neutralize and remove them.
In general, the pH level of the sorbent should be 6.0 ~ 6.5 and the SO3 2- ion concentration should be
Gypsum slurry from the absorber sump is thickened in a hydrocyclone and then more than 90% is below 0.1 mol/L. The SO3 2- level of the sorbent is controlled by adjusting the amount of oxidation air. The next step is the cyclone, where most of the dust is
dewatered by a vacuum belt filter. Alternatively, a centrifuge may be used in place of the vacuum belt filter. removed. Dust is completely removed by the ESP or Bag
Filter later in the process so that only clean air is released
into the atmosphere.
City water
B

Mixing of sorbent Flue gas scrubing Gypsum dewatering

The reaction products and dust captured in the cyclone
TR 5 Water storage
1. Absorber sump Wet ESP Wet EP
tank are recycled to the reactor and used as an absorbent.
Powdered 2. Absorption zone washing
limestone
Make-up water Effluent From ID fan
pump This means lower operating costs due to the reuse of
3. Demister 1
Clean gas 7 10
4. Oxidation air blower
A alkaline chemicals. The GSA system can be run at
3 From tank lorry
5. Sorbent silo
2 Absorber M minimal cost according to the target discharge rate if it is • GSA - Bag Filter & ESP Chongging, China
Raw gas M Oxidizer
5 Mg(CH)2
2
11 6. Tank for freshly prepared feed pump
Water transfer
pump
linked up to an acid gas monitoring system.
scrubbing suspension
Oxidation air Mg(CH)2 Circulation 6 Towts
8 7. Gypsum slurry Hydrocyclone station 4 pump
storage tank D
6 8. Vacuum belt filter
Oxidation air
1 9. Vacuum pump blower
9 3
10. Waste water Hydrocyclone station Absorber C
Circulating water blower Bleed off pump
Gypsum
11. Circulating water tank

• Wet Mg flowchart • Jeju Power Plant

Advantages
- Short installation period due to flexible module design
Advantages Projects - Low maintenance/repair cost
- Operating cost savings due to reuse of chemicals
- Easy operation and maintenance - Jeju Power Plant Units 1~2, Korea (2004, 2009)
- High removal efficiency
Advantages - Simple structure and compact size - BLCP Thermal Power Plant, Thailand (2005)
- High removal efficiency - Proven track record
- Low sorbent and power consumption
- High reliability and availability
- Stable byproduct (commercial grade gypsum)
Projects
- Nine Dragons Paper Manufacturing Power Plant, China (2008) • Chongging(China)

3 FGD Using The use of alkaline waste water eliminates the need for additional costly - Formosa Plastic Factory Power Plant, USA (2009)
Alkaline Waste chemicals. This lowers the energy costs due to less pressure loss.
Projects • Cheongju Local Heating Public Cooperation • Dangjin Thermal Power Plant Water
- Dangjin Thermal Power Plant Units 1~4
500MWX 4, Korea (1995)
- Cheongju Local Heating Public Cooperation,
Advantages
- Over 95% removal efficiency
Korea (2000) Mist eliminator
- Reduction in chemicals and wash pump
- Samcheonpo Thermal Power Plant Units 1~4
energy cost
560MW X 4, Korea (2002) From EP Booster fan

- Hadong Thermal Power Plant Units 7~8

500MW X 4, Korea (2006) Bleed off
pump
Absorber Recirculation
pump
Projects Ammonia water Conc. ammonia
supply pump Conc. ammonia
• Samcheonpo Thermal Power Plant • Hadong Thermal Power Plant
- Daegu Cogeneration Plant (2002) supply pump
storage tank
Ammonia waste
water storage tank

• Flow Chart • Daegu Cogeneration Plant • Shildally(USA) • Kara(Denmark)