An Introduction to Envirotherm GmbH Dedusting Technology Retrofit - PowerPoint PPT Presentation

An Introduction to Envirotherm GmbH Dedusting Technology Retrofit ESP into Fabric Filter 2012 05 23

Upgrading of existing ESP installations ENVIROTHERM Target Individual Action  Water Conditioning (Evaporation Cooler) Flue Gas Conditioning  SO 3 -Conditioning  NH 3 -Conditioning  Dual Conditioning (SO 3 /NH 3 )  Adding of additional field (same height, wider ESP-Enlargement plate spacing)  New internal equipment (same or larger field height)  Discharge electrode adaptation from field to field  Wider plate spacing (improved efficiency at less or same installed electrode weight, upgrading of T/R-sets usually required)  Conversion to Pulse Jet or Low Pressure Pulse Jet Fabric Filter Conversion Fabric Filter using existing casing, ducts, etc.  Upgrading of existing ID-fans

Retrofit ESP into FF ENVIROTHERM Target Individual Action  Check of existing static ESP conditions FF Conversion needs  Consider for casing statics the new operational data (as pressure difference, temperature)  Consider the flow situation (Inlet and outlet)  Calculation of cloth area needed  cost advantage Advantages  reaching of lower emission values  good performance of FF regardless the ash properties / ash resistivity

Reference 1: Fynsværket, DK ENVIROTHERM Project Retrofit Fynsværket 1 x 350 MW Coal Fired Boiler Low Pressure Pulse Jet Fabric Filter Client Elsam Fynsværket Location Odense, Denmark Completion December 2001 Type of Contract Turnkey, Fixed Price Type of Filter Low Pressure Fabric Filter Special Features Filter Casing Gas Inlet The Envirotherm / Lurgi Low Pressure Pulse Jet Fabric Filter was chosen as the best available technology for the gas cleaning equipment on the 1 x 350 MW coal fired boiler at Fynsværket. This installation is a retrofit of a 3 field dry ESP to reduce clean gas dust emissions to the lowest level based on the selected configuration. Scope of supply Design, supply, erection and commissioning of the filter, ducting, access, and insulation with turnkey responsibility for the project. Process Conditions Gas Flow (actual) 1.026.000 m 3 /h • Temperature 125 °C • 13,4 g/m 3 (STP, dry) Filter Roof, Cleaning tanks Inlet Dust Burden • Dust to be collected Boiler fly ash • ≤ 10 mg/m 3 (STP, dry) Guaranteed Emissions • Bag material PPS •

Reference 1: Fynsværket, DK ENVIROTHERM Retrofit : ESP casing now changed into Fabric Filter 5

Reference 1: Fynsværket, DK ENVIROTHERM Before Retrofit: ESP with 3 electric fields After Retrofit: Fabric Filter with 6 bag bundles 6

Reference 1: Fynsværket, DK ENVIROTHERM 6 pressure vessels for bag cleaning Rotating arms with nozzles directed down towards the bags for cleaning impulse

Reference 2: Enstedværket, DK ENVIROTHERM Project Enstedværket Client Dong Energy Generation A/S Location Aabenraa, Denmark Completion January 2007 Type of Contract Turnkey, Fixed Price Type of Filter Retrofit Conversion ESP into Pulse jet filter Special Features The Envirotherm / Lurgi High pressure Fabric Filter was chosen to convert the existing ESP into a Fabric filter with lower emissions. The existing casing was used. Scope of supply Design, aerodynamic testing, supply, erection and commissioning of the filter including piping, insulation, Pre-Coating Silo and Injection. Process Conditions Gas Flow (actual) 412.250 m 3 /h • Temperature 115 – 160 °C • 10 g/m 3 (STP, dry) Inlet Dust Burden • < 20 mg/m 3 (STP, dry) Outlet Dust Burden • < 2 mg/m 3 (STP, dry) Actual emissions •

Reference 2: Enstedværket, DK ENVIROTHERM 1. Removal of ESP electrodes and plates 2. Welding works: new tube sheet for bags and supports for roof and covers

Reference 2: Enstedværket, DK ENVIROTHERM 3. Bags and cleaning pipes installed 4. roof and covers closed; valves and blue pressure tanks installed

Reference 2: Enstedværket, DK ENVIROTHERM 5. Bags installed 6. Roof and all covers closed; final

Referencelist Pulse Jet Fabric Filters ENVIROTHERM