IMPULS bag filter

© Scheuch GmbH
SCHEUCH GMBH
AUROLZMÜNSTER, AUSTRIA
• Family Business since 1963
• ~130 million € turnover
• Over 620 employees
>800 in Scheuch Group
• More than 800 installations
at biomass combustion sites
worldwide
2
SCHEUCH GMBH
Ownership
Scheuch Private Foundation
Managing Directors
DI Stefan Scheuch (Technical Executive)
DI Jörg Jeliniewski (Commercial
Executive)
Employees
620 in Aurolzmünster
815 Scheuch Group
Turnover
EUR 130 Mio.
R&D
EUR 3 Mio. p.a.
Export
75 %
Mr. Stefan Scheuch (le),
Mr. Jörg Jeliniewski (ri)
3
IMPULS bag filter
Filter Bag Pattern and Media
© Scheuch GmbH
IMPULS bag filter
Plants < 10 MW / Single Compartment Filter
© Scheuch GmbH
IMPULS bag filter
Plants > 10 MW / Multi-Compartment Filter
© Scheuch GmbH
IMPULS bag filter
Filtration
© Scheuch GmbH
IMPULS bag filter
Cleaning
© Scheuch GmbH
IMPULS bag filter
Qualities of filter bags
ePTFE membrane
© Scheuch GmbH
P84 needle-felt
New
New
After 1,000 hours of operation
After 1,000 hours of operation
Computer-Aided Design in 3D
© Scheuch GmbH
Mechanical Installation
© Scheuch GmbH
Scheuch IMPULS bag filter
References
© Scheuch GmbH
Scheuch Flue Gas Cleaning
 Additive Silo and Dosing-System
© Scheuch GmbH
Additive Silo and Dosing-System Ca(OH)2
Decreasing
Reactivity
Ca(OH)2 + SO3 → CaSO4 + H2O
Ca(OH)2 + 2HF → CaF2 + 2H2O
Ca(OH)2 + 2HCl → CaCl2 + 2H2O
Ca(OH)2 + SO2 + ½ O2 → CaSO4 + H2O
Separation
efficiency:
HCl: approx. 95 %
SO2: approx. 75 %
Ca(OH)2 - Surface >20 m²/g
Ca(OH)2 - Surface >40 m²/g
© Scheuch GmbH
Separation
efficiency:
HCl: approx. 99
%
SO2: approx. 90
%
Additive Silo and Dosing-System Ca(OH)2
Pneumatic Conveyor Dosing-System for Ca(OH)2
Dosing Feeder
Injector
Conveying
Fan
© Scheuch GmbH
Additive Silo and Dosing-System BiCar
NaHCO3
Na2CO3 + CO2 + H2O
(thermal reaction)
2 NaHCO3 + SO3 → Na2SO4 + CO2 + H2O
NaHCO3 + HCl → NaCl + CO2 + H2O
2 NaHCO3 + SO2 → Na2SO4 + CO2 + H2O
NaHCO3 + HF → NaF + CO2 + H2O
T > 140 °C
Separation efficiency:
HCl: ≥ 99 %
SO2: ca. 95 - 99 %
NaHCO3
© Scheuch GmbH
Na2CO3
Additive Silo and Dosing-System BiCar
milled NaHCO3
particle
classifie
r
mill
© Scheuch GmbH
Additive Dosing-System Activated Carbon/HOK
© Scheuch GmbH
SCHEUCH
ELECTROSTATIC
PRECIPITATOR
– TYPE sef
SCHEUCH ELECTROSTATIC PRECIPITATOR –
TYPE sef
Operating Principle
 for Dedusting of Flue Gas,
Clean Gas Dust Content ≤ 10 mg/Nm³dry
 Incinerator Heat Power from 0,5 to 100 MW
 Gas Temperatures:
• < 300 °C (Standard)
• < 420 °C (Optional)
20
SCHEUCH ELECTROSTATIC PRECIPITATOR –
TYPE sef
HV-Transformer
ESP Types
1‐Field, 2‐Field, 3‐Field
HV-Insulator
Discharge
Electrodes (DE)
Insulator Box
Raw Gas Inlet
Collecting
Electrodes (CE)
Inspection Door
Clean Gas Outlet
CE-Rapping
System
Distribution Plate
(both sides)
DE-Rapping
System
Discharge Screw
Heating
Rotary Valve
Ash Discharge
Clean Gas Dust Content
≤ 10 mg/Nm³dry
21
SCHEUCH ELECTROSTATIC PRECIPITATOR –
TYPE sef
Transformer
Hermetic Enclosure
Transformer Coil
Non-ageing through
permanent oil cooling of
entire coil
Switchgear
Cabinet
incl. HV-controller
and PLC Siemens S7
Operation
Viewing and Operation
via operating panel
Siemens OP77
22
SCHEUCH ELECTROSTATIC PRECIPITATOR –
TYPE sef
Types
1‐
Field
2‐ Field
1‐ Field with
Multicyclone
3‐ Field
2‐ Field with
Multicyclone
23
SCHEUCH ELECTROSTATIC PRECIPITATOR –
TYPE sef
Assembly – SCHEUCH ESP Type sef
24
SCHEUCH ELECTROSTATIC PRECIPITATOR –
TYPE sef
3D CAD/Modelling + 3D Planning
CFD Simulation
25
Energy Recovery & Cleaning System
Titel
26
Benefit of ERCS
 Less resources consumption
 Energy saving up to 50% of boiler capacity
 Less air pollution
 Because the efficiency of the ERCS process makes it
possible to save up to 30% on fuel, investment costs
for the complete biomass-fired heating or CHP plant
are reduced by 10-15%.
Titel
Energy content – 1 MWh = 1000 kWh
Titel
©

1 MWh = heating value of 0,3
Srm Pellets

1 MWh = heating value of 1,8
Srm Rinde w60

1 MWh = evaporation heat of 1,5
(latent heat)
m³ Water

1 MWh = condensing heat of 1,5
m³ Water
ERCS-system
Effiency more than 100% !?
Titel
©
Flue gas Dewpoint
Integration of ERCS - plant

Titel
31
… ERCS plants are used for De-dusting and heat recovery from
flue gas of a biomass combustion
Boiler:
De-dusting:
ERCS-plant:
untreated biomass fuel
vapourizing of fuel moisture
multicyclone
Electrostatic precipiator
or bag filter
heat recovery with
condenser
additional de-dusting
de-pluming (option)
©
Types of design …
95110°C
5565°C
5565°C
condenser
Titel
32
©
Economizer +
condenser
Reduction of dust by ERCS system

Titel
As higher the dust content at the inlet as higher the reduction
Crude gas dust
content at the
inlet of ERCS
Clean gas dust
content at the
inlet of ERCS
Separation
rate
120 mg/Nm³
50 mg/Nm³
~58%
60 mg/Nm³
30 mg/Nm³
~50%
30 mg/Nm³
20 mg/Nm³
~33%
20 mg/Nm³
15 mg/Nm³
~25%
©
Reference 1 & 2 – ERCS EVS Schwaiger
 EVS Schwaiger GmbH in D-94491 Hengersberg (2 plants)
 Fuel Capacity: 10.000 kW (Plant 1); 6.200 kW (Plant 2)
 Boiler Capacity: 8.000 kW (Plant 1); 5.000 kW (Plant 2)
Total Heat Recovery (Design Point): 3.400 kW (Plant 1);
1.870 kW (Plant 2)
 Heat Recovering System was upgrated after existing dry
ESP‘s
 Start Up: 2006
Titel
Reference 1 & 2 : ERCS views
EVS Schwaiger
Titel
Reference 3: Plant Description –
Scope of Supply ERCS Steidle
 Multicyclone
 Dry Esp: Clean




Titel
Gas Dust < 50
mg/Nm³
Induced Draft Fan
Bypass-Switch,
Piping
ERCS-plant (Twostage Heat
Recovery System
in an Economizer
and a Condenser)
Process Tank
© Scheuch GmbH
THANKS FOR YOUR ATTENTION!