Ceramic Filter Elements for Hot Gas Filtration - - PowerPoint PPT Presentation

富利康科技股份有限公司

Ceramic Filter Elements for Hot Gas Filtration

富 利 康 科 技 股 份 有 限 公 司 CLEAN AIR TECHNOLOGY LIMITED

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About FLKCAT Ltd

 A new company entering the air pollution control sector  Aim to supply the best technologies for monitoring and

controlling air pollution

 Operating globally  Experienced personal – proven technologies  Technical partnerships – commercial strength  Speciality is ceramic filters with integrated catalysts

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Air pollution control

 Technology used to control emissions from industrial

sites to atmosphere for over 100 years

 Particulate control market dominated by electrostatic

precipitators and fabric filters

 Others include cyclones, scrubbers, metal filters and

ceramic filters – specialist techniques for specialist applications

 Our area of

speciality and the subject of today’s presentation is ceramic filters with integrated catalysts for industrial air pollution control

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What are ceramic filters?

 Many types of ceramic products used

for filtration

 Honeycomb filters – engines  Dense ceramics used in high pressure

high temperature applications

 We are focussing on products made

with ceramic or mineral fibres – formed into tubes/candles

 Compatible with standard bag filter

design concepts

 Good with “high” dust duties

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FLKCAT Ceramic Filter Products

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Ceramic filter features

 Highly porous  One piece construction  High Efficiency particulate removal  Chemically almost inert  High temperature resistance  Longest product 3 meters long  Rigid otherwise works like a fabric bag  Used with a sorbent can remove acid gases such

as SOx and HCl

 Combined with a catalyst can remove

pollutants such as NOx and dioxins

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Dust removal

 Some particulate

penetrates the surface and acts as a barrier to further dust penetration

 Dust accumulates on the

surface and is removed by cleaning pulses

 Non-blinding  High efficiency

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Acid gas removal

 Sorbent such as hydrated lime

Ca(OH)2 added as particulate to gas stream

 Sorbent accumulates on the

filter element surface

 Pollutants such as SOx and

HCl must pass through dust cake, and are neutralised by sorbent

 Spent sorbent is removed by

cleaning pulses

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Catalyst filter for DeNOx

 Catalyst distributed

throughout filter element structure

 Ammonia added to gas stream

to remove NOx

 Pollutants must pass through

filter and, in doing so, come into contact with the catalyst

 NOx and dioxins are converted

into harmless products, such as nitrogen and water

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Advantages – eliminates catalyst failure modes

 Catalyst is protected against the poisons such as As Se Na and K because

dust stays on filter surface

 Catalyst is protected against dust blockage and blinding  Catalyst life is extended >5 years expected  Catalyst evenly distributed

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Filter properties recap

Features Benefits Ceramic composition  Chemically inert with HF only known hazard  Maximum temperature of operation 900oC Filter made from ceramic fibres  The use of fibres gives the best balance of high efficiency and resistance to flow Rigid filter element  A support cage is not required  A surface dust layer provides high efficiency dust removal. Less than 2 mg/Nm3 is typical.  Non-blinding due to the surface dust layer, which gives long product life. 5 years and over is not untypical.  Small fibre diameter and surface dust layer ensures that even submicron particulates are captured.  The use of a sorbent gives an excellent bed for acid gas removal. High removal efficiencies can be obtained at higher temperatures of operation, with greater than 90% efficiencies readily achievable. Manufactured in one piece  No weak points such as bag stitching seams Tubular shape  Compatible with standard bag house designs Catalyst embedded into the filter element  Catalyst has high conversion efficiency for NOx and organic compounds  Optimal operation temperature of 350oc  Filter prevents poisoning of catalyst  Filter prevents masking of catalyst by dust particles  No chemical reaction between catalyst and ceramic filter  Nano sized catalyst particles present highly active catalyst sites  High performance achieved through no diffusion restriction

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Performance

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Technology options

Catalyst Ceramic filter Bag filter ESP 稀釋空氣 冷却系統 熱交換系統 DeNox DeSOx De-Dust

350℃ 200℃ 350℃

SCR SCR

Waste Gas

Heat recovery System

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Ceramic filtration markets

 Market driver is Legislation

 Incineration – WID  Glass – “Glass BREF”  MACT

 Process efficiency gains

 Improved product  Hot gas with value – energy recovery  Energy savings

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Markets

 Ceramic element – dust

and SOx removal

 Incinerators  Gasification  Waste to energy  Metallurgical  Product recovery  Process filtration

 Catalytic ceramic element -

dust, SOx & NOx removal

 Glass furnaces  Cement  Diesel engines  Power generation

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Glass Market

• Proven product offering
• Proven benefits
• Design refined
• Established references
• Established networks
• Dust SOx and NOx
• Market knowledge

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Advantages

 Highest level of efficiency – no visible dust  High temperature capability up to 900oC with dust

filter and up to 350oC with the catalyst

 Multi-functional – removes dust SOx NOx HCl

VOCs in one single step in one piece of equipment with excellent efficiency levels

 Smaller footprint  Opportunities to save capital cost and operational

costs

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Key product features and benefits

 The combination of ceramic filter and deNOx

catalyst is a powerful combination

 Considerable technical advantages over other

technologies

 Commercial advantages over other technologies  “Cheaper and better” is possible  Good for dust, SOx and NOx applications  Reliable and high performance  Long life expected  Growing market

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Conclusions

 Proven technology  Hundreds of references  Superior technical performance  Savings possible on capital and operational costs  Known performance  Long life of product  Technical back up from first class team  The ultimate multi-pollutant control technology

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Glass Factory

TSYP，China，2015

Right: catalyst ceramic filter applied Left: not applied