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INTRODUCTION OF SINOFINN’S WET ELECTROSTATIC PRECIPITATOR TECHNOLOGY
New Treatment Technology for Compound Fine Particles in Thermal Power Plants
Engineering Solutions
Wet ESP Technology Research & Application
International Application
A mature technology with more than 30 years successful operation & widely installed in USA, Europe and Japan.
Successfully used for collecting of various Air Pollutants, including PM 2.5, Acid Mist, Heavy Metals and with high efciency above 95%.
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Application in China
Widely used in the eld of Sulfuric Acid production and Metallurgy in 20th century.
With continuously raising of Environment Norms by Government, Wet ESP Technology is now being introduced to more and more plants.
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The Origination of Sinonn’s WESPSinonn is the only company in China who owns two types of Wet ESP technology, i.e.
Metal Electrode Plate WESP - from Finland Uni-Energy Oy
With more than 20 years successful operation in Finland, and widely installed in various elds including above 10000MW capacity of thermal plants.
Non-Metal Electrode Plate WESP - from Korean DAWOO Corp
Found in 1999, DAWOO Corp has set up 132 sets of WESP up to 2011 covering various elds, including Metallurgy, Waste Incineration, Acid Making, Titanium Oxide, etc. By 2014, there are 40 installations in coal-based thermal power plants. The DAWOO company is one of the earliest companies who developed and applied Non-Metal Electrode WESP technology to coal-red power plants. Its non-metal plate electrode (plate-type and pipe-type) wet electrostatic precipitators have a reliable operation performance of more than ten years in coal-red power plants. The unique front –end secondary condensing superne atomizing technology ensures WESP stable operation and high particulates removal efciency.
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Working Mechanism of WESPThe Working Mechanism of WESP is same as traditional dry ESP, i.e. By High Electric Field to extract charged particulates and fog droplets in Flue Gas. 1. The corona of Discharge Electrode ionizes the air, and the particulates and droplets being charged by acquiring ions. 2. Under the force of Electric Field, charged particles and droplets move towards the opposite electrode and being collected. 3. The collected particles and droplets are removed by water ushing and gravity.
SPRAYING NOZZEL
DUST COLLECTION PLATE
ASH HOPPER
WATER DISCHARGING
Working Mechanism of WESP
The Classication of WESP
Based on Material of Electrode Plate, include -
Metal Electrode PlateThe Conductive Fiberglass Electrode Plate Non-metal Flexible Electrode Plate
Based on Layout, include -
Horizontal LayoutVertical Layout
Layouts of WESPIndependently installed at downstream of FGD tower.
Tube-type: Perpendicular to Flue Gas ow, or
Additional Space for Installation required
Annex to FGD Tower, and installed at the top of FGD Tower
Tube / Plate-type: Perpendicular to Flue Gas ow
No Additional Space for Installation required
Structure and Technical Features of WESP Needle Cathode Rays adopted - Suitable for Flue Gas after Wet FGD.
Special Discharge Needle thread with good and stable discharging effect.
Adapt to various coals, and low impact on ElectricDischarging due to change of coal.
Can overcome Corona Suppression caused by sub-micron particulates in Flue Gas after Wet FGD.
Plate-type: Horizontal to Flue Gas
Structure and Technical Features of WESP - Metal Electrode Plate
Adoption of new Anode Plate
Plate with good Stiffness and Flatness - for even distribution of water lm.
Even at height, even , continuous and complete water lm can be formed.
It can ensure the continuous & complete water lm, and there is no blind angle for ushing.
Even Flue Gas under the speed of 4.5m/s, even, continuous and complete water lm can also be formed.
Section Sketch of New Anode Plate
Adoption of High Efciency Water Film Nozzle
The Water Film Nozzle, after optimized design and testing, can achieve best water lm spraying effect with minimum water consumption and the optimal operation pressure. There is no splashing, and the water mist will not spray to the Cathode Ray which can avoid sparks and suppress corona, and will not affect the charging of particulates.
One Nozzle for one Electrode Plate. The water mist sprayed by nozzles shapes a plate status with 95 degree and spays to Anode Plate based on designed angle. In this way, the water lm will be continuous covering and no blind corner.
Fully recover and utilize of Efuent, No Discharge
The ash water diverted into FGD system has no effect to FGD system, and further no impact on the quality of gypsum.
Set up behind FGD system, WESP can share Water system and Efuent Treatment system with FGD, and overall reduce water consumption and investment on equipment.
The dust collected by WESP will be ushed by water. The ash water diverts into FGD system as the make-up water. The rest ash water after Chemical dozing and auto lter is as recycled water for WESP and mainly used for ushing of Electrode Plate. .
Manhole Spraying System
Shell
Outlet Cone
ESP Hopper
Discharge Electrode SystemCollector Electrode System
Inlet Cone
Gas Distribution
Plate
Rectifying Unit
Flue Gas
Discharge Electrode Supporting Insulator
Cathode Ray Spraying HeaderAnode Plate Spraying Header
Anode Plate Spraying Header
Spraying Nozzle
Anode Plate
Cathode Ray
Anode Plate
Recycled Water Makeup Water
Auto Filter
FLUE GAS
Makeup W
ater Tank
Chem
ical Tank
Recycled W
ater Tank
Ash W
ater Tank
Ash Water
Ash Water
Chemical Water
AS FGD MAKEUP WATER
Structure and Technical Features of WESP - Metal Electrode Plate Automatic Adjustment of Output Power and Make-up Water
According to the signals of Unit Load and Emission concentration, WESP system can automatically adjust Output Power and Make-up Water amount to achieve energy-saving.
Unique Anode Electrode Flushing Technology
Front-end Field Secondary Condensing & Superne Atomizing + Intermittent Top Flushing
The Secondary Condensing & Superne Atomizing (unique technology of Sinonn & DAWOO) always ensure Electrode Plate covering with a 30 µm thickness water lm produced through condensation of saturated Flue Gas. Associated with intermittent ushing, the gypsum or dust
accumulation on Electrode Plate can be prevented, and WESP can be operated stably with high efciency.
Further, Intermittent Top Flushing can again wash Electrode Plate ( Washing cycle is 24-72h)
WESP, either Metal Electrode Plate or .Non-metal
Electrode Plate, requires de-ashing by continuous
water lm. Otherwise, the Efciency of WESP
wi l l be ser ious ly a f fec ted due to ash
accumulation on plate during long time
operation. .
Notes:
Superiorities of Secondary Condensing & Superne Atomizing + Intermittent Top Flushing
Low Water Consumption, can be make up from FGD Tower and Zero Efuent.
No Efuent Treatment System, Simple Design with High Availability.
Water Film produced during Secondary Condensing can be as self-washing of Electrode Plate, which is much better than that through spraying in Metal Electrode Plate of WESP.
Structure and Technical Features of WESP - Non Metal Electrode Plate Patented Anode Module from Korean DAWOO Corp
Good ConductivityExcellent Flame Resistance – by using re retardant resin. Processing Technology – through Korean hand-made manufacturing technology to ensure the resin content in the Anode Modules and guarantee a service life more than 30 years.
Structure Advantages:
Non-metal Tube Type
There is no steel shell cover outside Anode Module, and further there is no contact between supporting beam and Flue Gas. Hence, even without anti-corrosion system can also run for long time with zero maintenance.
Excellent Sealing Process - resolve the sealing problem between MS and FRP and swelling.
Non-metal Plate Type
The dust collecting plate is equipped with the top hanging device and bottom calibration device, ensuring the accurate space between the electrodes.
The dust collecting plates adopt clamping slot structure, which is convenient for installation and maintenance.
Introduction of Raw Material for Non-metal Anode Plate (Tube)
The raw materials of Sinonn’s Non-metal WESP Anode Plate (Tube) adopt high grade Fire Resistance Epoxy Vinyl Resin, Glass Fiber Mat and Carbon Fiber Surface Mat, etc. These raw materials are hand-made by skilled workers. The resin content in product is more than 65%, enabling an excellent corrosion-resistant performance. The inner surface of plates and tubes is treated with special technology to keep good conductivity. All of modules are inspected and tested in accordance with DAWOO’s strict technical quality standards including raw material procurement, product manufacturing and assembly. Comparing with moulding by hand, CFRP Anode Plate made by Mechanical moulding contains resin less than 28%, and the corrosion-resistance performance is relatively poor, and the service life normally is less than 6 years.
Gas Flow Simulation via Large –scale Computer – to ensure best Gas Distribution
Gas Distribution Value of Vertical Layout Tube-type WESP from Computer Simulation
Structure and Technical Features of WESPGas Flow Simulation via Large –scale Computer – to ensure best Gas Distribution
Gas Distribution Value of Horizontal Layout Tube-type WESP from Computer Simulation
Wet ESP Dry ESP V/S
Items
Working Mechanism
Way of De-ashing
Ash Form
Flowing Speed of Flue Gas
Flue Gas Handling Time
Ash Specic Resistivity
Water Treatment Facility
Anti-corona
Outlet Emission Concentration
Re-entrainment
PM10 Removing
PM2.5 Removing
SO3 Removing
Droplets Removing
Opaqueness Removing
Hg Collection
Anti-corrosion
Average Pressure Loss
Dry ESP
Corona Discharge
Via Vibrator
Dry Ash
1.5 m/s
10 s
+104 〜1012 Ω-cm
Not Required
Yes
General More Than 20mg/Nm3
Yes
Yes
No
No
No
No
No
Not Required
200~300Pa
Corona Discharge
Via Water Film Flushing
Wet Ash
<4.5 m/s
1-4 s
Not Applicable
Required
No
Less Than1mg/Nm3
No
Yes
Yes
Yes
Yes
Yes
Yes
Required
200~300Pa
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Sr. No Wet ESP
FGD Outlet Flue Gas Composition (PM)
Sr. No.
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Description
Fly Ash
Gypsum Droplet
SO3 Droplet
Other Condensation PM (toxic metal contaminants)
Nature
Filterability PM 2.5
Air Entrainment
Condensability PM 2.5
Condensability PM2.5
Remark
Depend on ash removal efciency of upstream system
From FGD system
From FGD system
From FGD system
PM2.5：PM 2.5 particles are air pollutants with a diameter of 2.5 micrometers or less, and these ne particles can lodge deeply into the lungs.
According to US EPA ‘s standard denition of PM 2.5,
The lterability PM 2.5: The particles exist in solid form even under temperature of 250F or above. The proportion accounted can be reached to 25%.
The Condensability PM 2.5: The steam condense in the room temperature. For example, So3 in sulfuric acid mist form. The toxic metal pollutants-cadmium, chromium, lead, magnesium and mercury. The proportion accounted for about 75%.
FGD Outlet Flue Gas PM Size Distribution Based on various research, it is found that most of PMs in FGD outlet Flue Gas are ultrane and the diameter is blow 6 µm. Please refer to
graph 1 and 2 for testing results of ve different kinds of coal. Graph 1 is for Accumulative Weight Distribution. From graph 1, it can be seen that about 90% of PM is below 2.5µm and mainly distributed
in the range of 0.6-1.2µm.
Graph 2 is for PM Size Distribution. From graph 2, it can be seen that most PM is ultrane with diameter of 1.2 µm and reaches to 32%. The
PM of 2.5-6 µm is not much.
Functions of WESP Removal of Ultrane PM with High Efciency
The WESP can efciently remove Submicron Particulates, Droplets and even ultrane Particulates with size up to 0.01 microns. The PM Removal Efciency can be above 90%, which can be adjusted by charging different quantity of elds
Removal of So3 Mist Droplet with High Efciency
Because of high concentration of acid fog in the FGD’s wet gas. The opacity of ue gas emitted is quite high which intensies the device corrosion in the downstream and surrounding.The WESP can efciently remove SO3, which exists in the form of H2SO4 in Flue Gas with average diameter below 0.4 µm and belongs to Submicron Particles and can not be removed
by traditional Dry ESP.
Functions of WESP
The Heavy Metal in Flue Gas, mainly Hg, in Flue Gas includes Gas-phrase Elementary Hg, Gas-phrase HgO and Solid Hg Particulate.Based on research of US EPRI, it has been observed that up to 95% of PM2.5 and 50% of HgO can be removed by only set up of one WESP Field after traditional Dry ESP.
Extracting Heavy Metal of Hg Reducing Flue Gas Opacity.
Sinonn’s Manufacture of WESP Metal Anode Plate Non-metal Anode Plate Non-metal Anode Tube
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Sr. No Client
2×300MW TIANJIN JUNLIANGCHENG
Power Generation Co., Ltd Unit #9 &10
2X75t/h SHANGHAI SINOFINN
Thermal Supply Co.,Ltd Unit #1 & 2
2×145MW SHANDONG LIYAN
Power Plant Unit #3 & 4
2×350MW SHANXI HEPO Power Generation Co., Ltd
Super Critical Cogeneration Unit
Structure Layout
Vertical Layout & Non-Metal (CFRP)Tube-type
Horizontal Layout & Metal (316L) Plate-type
Horizontal Layout & Non-metal (CFRP) Plate-type
Vertical Layout & Non-Metal (CFRP)Tube-type
Emission Requirement
≤5mg/Nm3
≤5mg/Nm3
≤10mg/Nm3
≤4mg/Nm3
Year of Operation
December, 2014
April, 2015
May, 2015
February 2016
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6
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2×145MW SHANDONG LIYAN Power Plant Unit #5 & 6
2X75T/h Biomass Thermoelectric Boiler of South China Sugar Industry Group
2X85T/h Biomass Thermoelectric Boiler of South China Sugar Industry Group
1X75T/h Biomass Thermoelectric Boiler for MENGDUI Sugar Factory of
South China Sugar Industry Group
Horizontal Layout & Non-metal(CFRP) Plate-type
Horizontal Layout & Metal
(316L）Plate-type
Horizontal Layout & Metal
(316L）Plate-type
Horizontal Layout & Metal
(316L）Plate-type
≤5mg/Nm3
≤10mg/Nm3
≤10mg/Nm3
≤10mg/Nm3
October, 2015
June, 2016
June, 2016
January, 2016
Typical Installations Of WESP
2×350MW SHANXI HEPO Power Generation Co., Ltd, Supercritical Cogeneration Units
Contract Scope: EP
Design Parameters： PM Inlet：� ≤30mg/Nm3
PM Outlet：� ≤5mg/Nm3
Parameters physically measured during operation:
PM Inlet：� 28mg/Nm3
PM Outlet：� 3.8mg/Nm3
2X75t/h SHANGHAI SINOFINN Thermal Supply Co.,Ltd Unit #1 & 2
Contract Scope : EPC
Structure Layout: Horizontal Layout & Meta（l 316L）Plate-type
Structure Layout: Vertical Layout & Non-Meta（l CFRP）Tube-type
Design Parameters：�
PM Inlet：� ≤60mg/Nm3
PM Outlet：� ≤5mg/Nm3
Parameters physically measured during operation： PM Inlet：� 57mg/Nm3
PM Outle：t 3.8mg/Nm3
2×145MW SHANDONG LIYAN Power Plant Unit #3 & 4
Contract Scope： EPC
Structure Layout： Horizontal Layout & Non-metal (CFRP) Plate-type
PM Inle：t ≤80mg/Nm3
PM Outle：t ≤10mg/Nm3
Design Parameters：
Parameters physically measured during operation
PM Inle：t 71mg/Nm3
PM Outle：t 5.7mg/Nm3
Typical Installations of WESP2×300MW TIANJIN JUNLIANGCHENG Power Generation Co., Ltd - Unit #9 &10
Contract Scope : Engineering Design & Supply of Key Equipment
Structure Layou：t Vertical Layout & Non-Metal (CFRP）Tube-type
PM Outlet：� ≤5mg/Nm3
PM Inlet：� ≤30mg/Nm3
Design Parameters：
PM Inlet：� 29mg/Nm3
PM Outlet：� 3.3mg/Nm3
Parameters physically measured during operation:
Typical Installations of WESP1X75T/h Biomass Thermoelectric Boiler for MENGDUI Sugar Factory South China Sugar Industry Group
Contract Scope： EPC
Structure Layout： Horizontal Layout & Metal (316L）Plate-type
Design Parameters：�PM Inlet：� ≤150mg/Nm3
PM Outlet：� ≤30mg/Nm3
Parameters physically measured during operation
PM Inlet：� 146mg/Nm3
PM Outlet：� 20.3mg/Nm3
高 瞻 远 瞩 & 合 作 共 赢 ！
Looking Forward to a Long Term &
Mutually Benecial Business Relationship
Enabling Growth With Technology
Passion Motivation Dedication Trust
Building No.5, No.3000, Longdong Avenue, Pudong New Area, Shanghai, China. Pin Code - 201203.
Tel : 8621-61005858
Fax : 8621-61009658
E-mail : [email protected]
Shanghai Sinonn New Energy Investment Co. Ltd.
Sinonn Energy (India) Private Limited.
234, Satra Plaza, Sector -19D, Vashi, Navi Mumbai, Pin Code - 400705Tel : 022- 27847662
