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Chapter 88.2.1.1 Particle formationPrillingConcentrated urea melt is sprayed through a spinning bucket or prill head located at the top of atower. The liquid droplets (“prills”) that are formed fall through the tower and are cooledagainst a countercurrent flow of air which allows the prills to solidify. Further cooling is usuallyrequired. With some plant designs, the cooler is incorporated into the base of the prill tower; inothers, a cooling takes place after the prills have been removed from the tower.GranulationVarious types of granulation equipment are available, including drum granulators, pangranulators and fluidised bed granulators. The basic principle of the process involves thespraying of concentrated melt onto recycled seed particles circulating in the granulator. Anincrease in granule size and drying of the product take place simultaneously. Air passingthrough the granulator solidifies the melt deposited on the seed material. All commercialprocesses are characterised by product recycling. After the formation of the granules, it may benecessary to dry and/or to cool the product.8.2.2 UANFor production of UAN using the partial recycle CO 2 stripping process, see Section 8.4.14.Continuous and batch type processes are used for the production of UAN. In both processesconcentrated urea and ammonium nitrate solutions are measured, mixed and then cooled. Figure8.2 gives an overview.In the continuous process, the ingredients of the UAN solution are continuously fed to andmixed in a series of appropriately sized static mixers. Raw material flow as well as finishedproduct flow, pH and density are continuously measured and adjusted. The finished product iscooled and transferred to a storage tank for distribution.In the batch process, the raw materials are sequentially fed to a mixing vessel fitted with anagitator and mounted on load-cells. The dissolving of the solid raw material(s) can be enhancedby recirculation and heat exchange as required. The pH of the UAN product is adjusted prior tothe addition of the corrosion inhibitor.Process waterUrea (solid or in solution)AN (solid or in solution)SolutionmixingpH adjustment (HNO 3or NH 3)corrosion inhibitorUAN solutionfor storage ordistributionFigure 8.2: Overview of the production of UAN solution[128, EFMA, 2000]326 Large Volume Inorganic Chemicals – Ammonia, Acids and Fertilisers
Chapter 88.3 Current emission and consumption levelsConsumption of Per tonne urea Unit Remarks Reference567 Snamprogetti NH 3 stripping570 Other stripping processes[9, Austrian UBA, 2002]567 CO 2 stripping567 NH 3 strippingkg570 IDR process[52, infoMil, 2001]NH 3580 – 600570 ACES process564 Specification for new plants [130, Uhde, 2004]Typical figures for conventional processes [124, Stamicarbon, 2004]735 Snamprogetti NH 3 stripping740 – 750 Other stripping processes[9, Austrian UBA, 2002]730 Specification for new plants [130, Uhde, 2004]CO 2740733 kgCO 2 stripping735 NH 3 stripping740 ACES process[52, infoMil, 2001]IDR processTable 8.3: Reported raw material consumption levels for the production of ureaLarge Volume Inorganic Chemicals – Ammonia, Acids and Fertilisers 327
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EUROPEAN COMMISSIONIntegrated Pollu
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Executive SummaryEXECUTIVE SUMMARYT
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Executive SummaryII.Production and
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Executive Summarybed, using a cesiu
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Executive SummaryConversion process
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Executive SummaryBAT is to treat al
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PrefacePREFACE1. Status of this doc
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Preface5. How to understand and use
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2.2.4.2 Gasification of heavy hydro
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5.4.2 Hemihydrate process (HH) ....
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10.4.3 Fluoride recovery and abatem
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Figure 8.1: Overview of the product
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Table 4.20: Energy balance of a dou
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ScopeSCOPEThis document on Large Vo
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Chapter 197 % of nitrogen fertilise
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Chapter 11.1.2.3 High exhaust gas v
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Chapter 1the SSD of NPK does not le
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Chapter 11,8Relative production cap
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Chapter 11.2.3 Supply of steam and
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Chapter 11.3 Overview of emissions
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Chapter 1ApplicabilityGenerally app
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Chapter 11.4.3 Handling excess stea
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Chapter 11.4.5 Optimisation/mainten
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Chapter 1Operational dataNo informa
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Chapter 1ApplicabilityEspecially ap
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Chapter 11.4.9 Environmental manage
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Chapter 1(v) Documentation- establi
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Chapter 1iv. allow for comparison w
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Chapter 1A number of studies show t
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Chapter 11.5 Common BATIn understan
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Chapter 11.5.2 BAT for environmenta
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Chapter 2Location CompanyCapacity F
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Chapter 22.2.2 Output from ammonia
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Chapter 22.2.3.2 Primary reformingT
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Chapter 2Process name Solvent/reage
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Chapter 22.2.4 Partial oxidationThe
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Chapter 2In the moving bed process,
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Chapter 22.2.6 Storage and transfer
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Chapter 2Production process Feedsto
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Chapter 22.3.2 NO x emissionsTable
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Chapter 22.3.3 Other consumption le
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Chapter 2ParameterProcessEmission l
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Chapter 22.4 Techniques to consider
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Chapter 22.4.2 Processes with reduc
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Chapter 22.4.3 Heat exchange autoth
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Chapter 22.4.4 Revamp: increase cap
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Chapter 22.4.5 Pre-reformingDescrip
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Chapter 2ApplicabilityGenerally app
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Chapter 22.4.7 Advanced process con
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Chapter 22.4.9 Combined Claus unit
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Chapter 2Operational dataSee Descri
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Chapter 22.4.12 Preheating of combu
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Chapter 22.4.14 Isothermal shift co
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Chapter 22.4.16 Stripping and recyc
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Chapter 22.4.18 Use of sulphur resi
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Chapter 22.4.20 Indirect cooling of
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Chapter 22.4.22 Ammonia removal fro
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Chapter 22.4.24 Metal recovery and
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Chapter 2Driving force for implemen
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Chapter 22.5 BAT for ammoniaBAT is
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Chapter 33 NITRIC ACID3.1 General i
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Chapter 3Pressure in bar Temperatur
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Chapter 33.2.5 Tail gas properties
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Chapter 33.3 Current emission and c
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Chapter 3N 2 O emission levelProces
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Chapter 3N 2 O emission levelProces
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Chapter 3Process typeNO x emission
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Chapter 3Process typeNO x emission
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Chapter 3140120Generation factor %1
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Chapter 33.4.2 Optimisation of the
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Chapter 33.4.3 Alternative oxidatio
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Chapter 33.4.4 Optimisation of the
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Chapter 3Achieved environmental ben
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Chapter 33.4.5 N 2 O decomposition
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Chapter 33.4.6 Catalytic N 2 O deco
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Chapter 3According to [89, Kuiper,
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Chapter 33.4.7 Combined NO x and N
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Chapter 3EconomicsInvestment costs.
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Chapter 3Operational dataSee descri
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Chapter 3NOx removal efficiency in
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Chapter 33.4.10 Addition of H 2 O 2
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Chapter 33.4.11 NO X reduction duri
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Chapter 3Installing a low temperatu
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Chapter 3NO x emission level as NO
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Chapter 3Operational dataNo specifi
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Chapter 4Country Company Location C
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Chapter 4Country Company Location C
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Chapter 4Figure 4.2 gives an overvi
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Chapter 4Two general converter type
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Chapter 4Figure 4.6 gives an impres
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Chapter 44.2.3 Sulphur sources and
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Chapter 44.2.3.5 Non-ferrous metal
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Chapter 4Sulphur source/SO 2 produc
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Chapter 410Tail gas specific SO2 lo
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Chapter 4Capacity in tonnesof 100 %
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Chapter 4Capacity in tonnesof 100 %
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Chapter 4SO 2 sourceSpent acid and
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Chapter 4Cross-media effectsWithout
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Chapter 44.4.3 Addition of a 5 th b
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Chapter 44.4.4 Application of a Cs-
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Chapter 4EUR/yearWaste gas volume (
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Chapter 44.4.6 Replacement of brick
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Chapter 4EUR/yearWaste gas volume (
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Chapter 4PlantSO 2 sourceInlet SO 2
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Chapter 44.4.10 Combination of SCR
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Chapter 44.4.14 Monitoring of SO 2
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Chapter 4EconomicsCost benefits can
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Chapter 4Energy inputRecovery and l
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Chapter 44.4.16 Minimisation and ab
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Chapter 44.4.17 Minimisation of NO
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Chapter 44.4.19 Tail gas scrubbing
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Chapter 44.4.21 Tail gas treatment:
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Chapter 4Economics[58, TAK-S, 2003]
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Chapter 4EconomicsNo specific infor
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Chapter 4BAT is to minimise and red
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Chapter 55.2 Applied processes and
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Chapter 55.2.2.1 Raw materials5.2.2
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Chapter 5OriginChinaMine/regionRare
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Chapter 55.2.2.2 GrindingDepending
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Chapter 5Emission of mg/l g/tonne P
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Chapter 55.4 Techniques to consider
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Chapter 55.4.2 Hemihydrate process
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Chapter 55.4.3 Hemi-dihydrate recry
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Chapter 55.4.4 Hemi-dihydrate recry
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Chapter 55.4.5 Di-hemihydrate recry
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Chapter 55.4.6 RepulpingDescription
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Chapter 55.4.7 Fluoride recovery an
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Chapter 55.4.8 Recovery and abateme
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Chapter 5Operational dataNo informa
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Chapter 55.4.11 Decadmation of H 3
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Chapter 55.4.12 Use of entrainment
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Chapter 5Cross-media effects• dis
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Chapter 5Cross-media effectsTable 5
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Chapter 5ApplicabilityAt present, o
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Chapter 66 HYDROFLUORIC ACID6.1 Gen
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Chapter 6Component Portion (mass co
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Chapter 66.2.4 Process gas treatmen
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Chapter 6Emission of kg/tonne HF Re
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6.4 Techniques to consider in the d
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Chapter 66.4.2 Energy recovery from
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Chapter 66.4.4 Valorisation of fluo
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Chapter 66.4.6 Scrubbing of tail ga
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Page 337 and 338: Chapter77.4.7 Optimising the recycl
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Page 356 and 357: Chapter 8Consumption of Per tonne u
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Page 368 and 369: Chapter 8Operational dataSee Table
Page 370 and 371: Chapter 8Operational dataSee Table
Page 372 and 373: Chapter 8Driving force for implemen
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Page 376 and 377: Chapter 8Existing plantCase 2Revamp
Page 378 and 379: Chapter 88.4.8 Heat integration in
Page 380 and 381: Chapter 88.4.9 Combined condensatio
Page 382 and 383: Chapter 88.4.10 Minimisation of NH
Page 386 and 387: Chapter 8Other approaches to proces
Page 390 and 391: Chapter 88.5 BAT for Urea and UANBA
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Page 394 and 395: Chapter 99.2.2 NeutralisationThe ex
Page 396 and 397: Chapter 9Scrubbing devices• packe
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Chapter 99.4.2 Recovery of residual
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Chapter 99.4.3 Energy consideration
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Chapter 99.4.4 Steam purification a
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Chapter 99.4.5 Autothermal granulat
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Chapter 9ApplicabilityIrrigated can
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Chapter 1010 SUPERPHOSPHATES10.1 Ge
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Chapter 10Emissionto airEmissionto
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Chapter 10Input Indirect granulatio
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Chapter 10Volume5 - 10 m 3 /hourTem
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Chapter 1010.4.2 Recovery and abate
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Chapter 1010.4.4 Recycling of scrub
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Chapter 1111 CONCLUDING REMARKS11.1
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Chapter 11Production of HNO 3 : De-
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References26 Dipankar Das (1998).
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References89 Kuiper (2001). "High t
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References147 Uhde (2006). "The Uhd
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GlossaryCalculation of steam proper
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GlossaryIPCCIPPCISO 14001Intergover
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GlossaryChemical formulasAl 2 O 3Ca
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Annexes14 ANNEXES14.1 Cost calculat
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