Embed Size (px)
Citation preview
Karl WalbySenior Key Account Manager
Dürr Systems, Inc
2
Filter Market
Global market size ̴ 18 billion USD
Fabric filter and ESP dominate
Ceramic filter plays a minor rolefabric filter
59%
WESP33%
DESP6%
other2%
stone & cement
31%
steel18%
power9%
asphalt8%
mining7%
metals6%
other21%Main industry segments ( ̴ 80%)
• stone & cement
• steel
• power
• asphalt
• mining
• metals
Source: McIlvaine
3
Ceramic Filters, History & Features
Development in the Clean Coal Program
Combined acid gas removal
• Medical waste incineration (dust & HCl)
High temperature applications
• > 250 – 400oC (900oC)
Product features• Low density 0.4 g/cm3 , light weight• 70 – 95 % porosity• Chemical resistant alumino silicate fibers• High temperature and thermal shock
resistant• High removal efficiency to > 2 mg/Nm3
• Low pressure drop
4
Ceramic Filters - Operation
Surface filtration on conditioned layer
Dust removal by reversed pulse air
Filter element does not expand and keeps a residual dust layer
Negligible dust penetration into the filter body
High filtration efficiency – HEPA* rated
Operates with variable dust loads
* High Efficiency Particulate Airfilter
5
Catalytic Ceramic Filters
Catalyst finely dispersed throughout the wall of the filter
No gas film limitation
Large surface area
Catalyst is protected from masking and poisoning by dust constituents, like alkali
Alkali aerosols
Surface barrier
Filter cake Catalyst
6
Functionality
Optional technology functions
• Dust removal• Aerosols removal• Acid gas removal (except HF) while injecting sorbent• NOx removal while injecting ammonia• Dioxin removal• Specific VOC removal
7
Glass Industry Example Case
SCRSCR2 or 3 field 2 or 3 field
ESPESP
SOSOxx treatment treatment
with CaOHwith CaOH22
NHNH33
injectioninjection
ESP BasedESP Based
Catalytic filter
Fabric filterFabric filter
SorbentSorbent
injectioninjection
NHNH33
injectioninjection
Ceramic filter
NHNH33
injectioninjection
Fabric FilterFabric Filter
BasedBased
SorbentSorbent
injectioninjection
SCRSCRGas Gas
reheatreheat
8
Fields of Application
APC needs
Application
Dust SOx NOx VOC
Glass X X X -
Waste incineration X X X (X)
Boiler X X X (X)
Refinery X X X (X)
Diesel engines X X X (X)
Cement X X X X
Lime and minerals X X X (X)
Roasters X (X) (X) X
Gasifiers X (X) X (X)
9
Boiler MACT Potential
1. Market Prospect
• About ¾ of existing (1,7001)) solid fuel, coke oven gas or oil firing Major Source boilers or heaters are affected by increasingly tightening environmental legislation
2. Active Products– Market Fit
• Present BAT technology is (W)ESP, SCR DeNOxand FGD
3. New Catalytic Filtration Benefits
• Combine filtration, acid gas removal, catalytic NOx and VOC abatement with beneficial CAPEX savings
Image source: European Commission , Reference Document on Best Available Techniques in Large Combustion Plants, 2006 ---> http://eippcb.jrc.ec.europa.eu/reference/BREF/lcp_bref_0706.pdf
1) CIBO 2014, Industrial Emission Control Technology Conference, Portland, MN, 2013 --->http://www.cibo.org/emissions/2014/industrial_emissions.htm
10
Prospects for APC Control Adding Value to the Process/Efficiency Increase
Furn
ace
Fuel
Feed
FSI
Air
preheater
DSI Dry
sorbent
injection
HRSG
to stack
Ash removal
CaCO3 CaO
CaSO3
SO
2
SO2
< 20%
SO2 < 1%
SO3 < 1 ppm
CaO
2,700oF
1,000oF
550 - 750oF
Catalytic
hot gas
filter
SO2 < 20%
SO2
CaO
Furnace
Ca(OH)2
Ammonia
injection
