8/3/2019 Flugasche Engl
1/24
Information
FlyAsh andDry Product Handlingfor Flue Gas Cleaning
I BAU HAMBURG
8/3/2019 Flugasche Engl
2/24
2
Systems and componentsfor power plants
IBAU HAMBURG not only suppliessystems and components for powerplants but also complete customisedsolutions for handling fly ash, pulveri-sed limestone, quicklime and gypsum.
Fly ash handling
Conventional coal-firedpower plants
Circulating fluidized bedpower plants (CFB)
Pulverised limestone,quicklime, hydrated limeand gypsum handling
Wet flue gas cleaning(Wet FGD)
Dry flue gas cleaning(Dry FGD)
We supply turnkey ash removal sys-tems from filter discharge to loadingof the fly ash, designed according tocustomer specifications and of courseassist with the planning.
Main IBAU components:
Pneumatic conveying installations: Fluidslides Pressure vessels Screw pumps Rotary air locks Jet conveyors
Silo, storage and loadingtechnology: IBAU large-storage silos Steel silos with aerated bottom Loading systems for pressure
vessel trucks Pressure vessel truck discharge
Fly ash processing/homogenisation: Mechanical mixers Pneumatic homogenisation
technology
Classification technology ESP ash removal
Fly Ash Handling
IBAU Loading
IBAUFlow Control Gate
IBAUTwo-Way Valve
8/3/2019 Flugasche Engl
3/24
3
and ash storage silos
Information
IBAUScrew Pump
IBAUFluidslide
IBAU Rotary Air Lock
8/3/2019 Flugasche Engl
4/24
4
IBAU fluidslides at Power Plant Florina
Fly Ash Handling
Conveyingsystems
IBAU HAMBURG hasthe right conveying solu-tion in its programmewhatever the purpose:
Fluidslides:These systems are veryeconomical thanks to thelow energy consumptionand also 100% reliable inservice.
Ash removal can be per-formed for all hoppers of
one filter row via onlyone fluidslide. The fluid-slide slopes 5-7 fromthe horizontal. Given thehigh throughputs possi-
ble the systems are alsosuitable for large quanti-ties of lignite fly ash.Screw pumps are used to
8/3/2019 Flugasche Engl
5/24
5
Information
IBAUpressure vessels at Power Plant Litvinov
transport the ash furtherup to conveying dis-tances of 500 m.
Pressure vesselconveyors:Pressure vessels functionaccording to the dense-
phase flow principle.Several vessels are con-nected to one conveyingline. For different con-veying quantities diffe-
rent pressure vessel sizescan be combined. Theenergy consumption isrelatively low. Conveyingdistances > 1000 m are
possible. This means noother conveyors arerequired even with longdistances to the silo.
Jet conveyors:Jet conveyors are suitablefor fly ash quantities of upto 5 t/h and conveying dis-tances up to 100 m max.The specific material/ airratio is relatively low, andthe energy consumptioncorrespondingly high.
8/3/2019 Flugasche Engl
6/24
6
Fly Ash Handling
IBAUpumps during mounting
IBAU screw pump at Power Plant Mehrum
8/3/2019 Flugasche Engl
7/24
7
Information
IBAUjet conveyor for air preheater ash removal
8/3/2019 Flugasche Engl
8/24
8
IBAU central cone silo 25.000 m3 at Power Plant Mehrum
Fly Ash Handling
Storage
IBAU HAMBURG sup-plies pneumatic systemsfor the storage of fly ash at
power plants. They functi-on according to the first-in/first-out principle.
IBAU central cone silos:These silos have provedtheir worth time and time
again and are the industrialstandard for storage volu-mes up to 30,000 m3.
They are equipped with apneumatic discharge bot-tom and provide for mete-red and maintenance-freedischarge of material.
Multichamber design ispossible. The machineequipment and loadingsystems are situated under-
neath the central cone.
Dome silos / Conversionof existing oil tanks:Pneumatic discharge solu-tions are possible in appli-cations where dome siloscan be used to advantage.
The bottom is also coveredwith fluidslides as with thecentral cone silo, and thematerial dischargedtowards the middle of thesilo. With this solution the
loading point is installed atthe side of the silo. Old oiltanks can also be used forfly ash storage accordingto this principle.
Intermediate silos used tostore fly ash for furthertransport or loading aregenerally made of steel.They have either a flat orconical aerated bottom andare designed in sizes up to2000 m3.
8/3/2019 Flugasche Engl
9/24
9
Fly ash discharge from a central cone silo
Information
8/3/2019 Flugasche Engl
10/24
10
Fly Ash Handling
Intermediate silos in fly ash processing plant Maasvlakte
Discharge section of central cone silo after emptying residuesTypical discharge section of a central cone silo
8/3/2019 Flugasche Engl
11/24
11
Information
IBAU ash storage silos 15.000 m 3 and 25.000 m3 at Power Plant Mehrum
8/3/2019 Flugasche Engl
12/24
12
Fly ashprocessing
From being waste materi-al, fly ash has now beco-me a commodity. IBAUHAMBURG is supportingthis with innovative andeconomical technology.
Fly ash from an upstream
classification system (e.g.using screen devices or airseparators) is processedinto high-quality ash witha continuous mechanicalmixer. Mixers with capa-cities ranging between100 to 250 t/h are usedhere. Classification forexample allows the carbonlevels to be kept belowpermissible limits orspecific finenesses to beseparated.
To satisfy the high qualityrequirements stipulated bythe cement and concretestandards additional flyash homogenisation maybe necessary with qualityfluctuations occurring dueto firing. At least two silosare required for such aconcept. One silo is usedto take up the fly ashduring operation whilehomogenisation is carriedout in the second silo.
The silos are equippedwith so-called quadranthomogenisation systems,which are used to fluidise,circulate and mix the con-tents of the silo section bysection.
IBAU fly ash homogenisation silos at Power Plant Mehrum
Fly Ash Handling
8/3/2019 Flugasche Engl
13/24
13
Information
IBAU flow-through mixer type IB-DM
View inside an IBAU flow-through mixer
IBAU Single-
shaft flow-through mixerIB-DMThe mixer type IB-DMoperates according to theprinciple of centrifugalmixing. The mixing toolsare interchangeable andmounted on a rotatingshaft. The number andarrangement of the mixingtools and their geometric
shapes are tuned to eachother, enabling a three-dimensional mixing move-ment of the components inthe cylindrical, horizontalmixer. All mixing tools aredesigned to ensure that thesupplied electrical energyis converted with the hig-hest possible efficiency.The dwell time of thematerial in the mixer canbe influenced via an over-flow weir. Throughput per-formances of up to 450 t/hcan be achieved.
8/3/2019 Flugasche Engl
14/24
14
Fly Ash Handling
Screen technology at IBAU fly ash processing installation Maasvlakte
Control room at IBAU fly ash processing installation Maasvlakte
8/3/2019 Flugasche Engl
15/24
15
Information
IBAUboiler ash processing at Power Plant Flensburg
8/3/2019 Flugasche Engl
16/24
16
IBAU lump crusher under absorber
Fly Ash Handling
IBAU HAMBURG sup-plies systems fromtruck/rail discharging ofabsorbents to the loadingof dry residual materialfrom flue gas desulphuri-sation (FGD).
Absorbents are deliveredby truck or rail pressure
vessel truck. Truckdischarge is carried outwith compressed air and
pneumatic transport tothe storage silos. Hereconveying distances ofup to 100 m are possiblewith discharge capacitiesof up to 60 t/h per pres-sure vessel truck.
Storage silos have capa-cities of up to approx.2000 t and are equipped
with pneumatic dischargedevices. Lime, pulverisedlimestone and hydratedlime are used for dry orquasi-dry flue gascleaning. Material can betransported to the absor-
ber with fluidslides. Theresidual material fromthe process is dischargedeither using fluidslides,rotary valves, screw
pumps or pressure vesselconveyors.
Lime is transported fromthe storage silo, using ascrew pump for example,to the dosing silo forlime milk production.The wet flue gas gypsumis dehydrated and driedand after the dryerconveyed pneumaticallyto the gypsum storagesilo using screw pumps.
Flue gascleaning
8/3/2019 Flugasche Engl
17/24
17
Information
IBAU low-pressure conveying system for FGD product
8/3/2019 Flugasche Engl
18/24
18
Fly Ash Handling
Pressure vessel rail car discharge for pulverised limestone
Conveying air control unit for pressure vessel rail car discharge
8/3/2019 Flugasche Engl
19/24
19
Information
IBAU lime dosing upstream of absorber lime milk tank
8/3/2019 Flugasche Engl
20/24
20
IBAUpressure vessel for conveying bed ash
Fly Ash Handling
Combustion
Low-grade coal and biofuels are being increasing-ly burnt in CFB pressurevessel installations andconverted into energy:here IBAU HAMBURGoffers appropriate conceptsand solutions for the han-dling of ash and lime.
Combustion bed ash witha grain size of up to2-3 mm is dischargedpneumatically fromthe combustion chamberor the ash cooler to thebed material silo or stor-age silo using a pressurevessel according to thedense-phase flow convey-ing principle.
Fluidslides, Fpipe andsmall pressure vesselshave proved to be effec-tive for the removal of flyash downstream of the fil-ter. The material is con-veyed to an intermediatesilo and is transported fur-ther to the ash silo using ascrew pump.
Pulverised limestone forexample is metered andblown in directly into thecirculating fluidized bedby a screw pump. Thefine-grained pulverised
limestone ensures that fluegas desulphurisationalready takes place in thecombustion chamber.Besides sulphur most ofthe chlorine and fluorinebond to the dry ash.
8/3/2019 Flugasche Engl
21/24
21
Information
IBAUpulverised limestone dosing at VW Power Plant
8/3/2019 Flugasche Engl
22/24
22
Fly Ash Handling
ESP ash removal with IBAU fluidslides
8/3/2019 Flugasche Engl
23/24
23
Information
IBAU Fpipe conveying system forESP ash removal
8/3/2019 Flugasche Engl
24/24
Fly Ash Handling
We supply customer-oriented solutions for loading and discharge, storageand the pneumatic conveying of dry product from
flue gas desulphurisation plants as well as for fly ash.
I BAU HAMBUR G Rdingsmarkt 35 D-20459 Hamburg PHONE +49 (0) 40 36 13 090FAX +49 (0) 40 36 39 83 Email: [email protected] Internet: www.ibauhamburg.de
FGDplant for Power Plant
Oroslany / Hungary
Combined dry ash and wet ash loading at
Power Plant Mehrum / Germany
Fly ash processing plant Maasvlakte / Netherlands Power Plant Florina / Greece
Top Related