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Chapter 6Cross-media effectsEnergy, water and, in the case of alkaline scrubbing, chemicals consumption.Operational dataThe equipment necessary for HF absorption is typically made of rubber lined steel or massivePVC, polypropylene or polyethylene (optionally it may be fibre glass reinforced).ApplicabilityGenerally applicable. Scrubbing with water or alkaline solution is a well established and proventechnique.Liquid phase alkaline absorption (single-stage) is sufficient for limited or intermittent HF flows.As neither HF nor alkali are recovered in this option, and as large quantities of NaF in the wastewater can be a problem, this solution is not recommended for large continuous amounts of HF.In this case, the solution developed in the combination of water and alkaline absorption ispreferred.Solid alkaline absorption in a fixed bed is an economic possibility for small effluent streams ofmoist gases containing HF.EconomicsSee also Table 6.10.The investment for a 100 m 3 /hour gas flow in a single-stage, once-through absorption is in therange of EUR 50000 – 80000 (data valid for new plants).For a double-stage gas treatment, the investment cost is in the range of EUR 150000 – 200000(new plants), or EUR 2000 – 4000 per 1000 m 3 /hour.A significant additional investment cost may arise if no alkaline solution is available on-site. Insuch a case, the installation of a tank, a transfer line and an unfilling station may be necessary.Operating costs mainly involve alkali consumption (if any), energy consumption, liquid effluentneutralisation and maintenance costs. For HF solution recovery, the alkali consumption is verylow (disregarding the SO 2 absorption). When HF is not recovered, an equivalent alkali flow isconsumed, either at the absorption step or at the effluent neutralisation step. This is not true if analkaline effluent is yielded by another production unit, with a mixing of the two flows in acommon effluent treatment. There the energy consumption basically corresponds to waterpumping and is usually not critical.Maintenance costs are usually around 5 % of the investment costs per year of operation.References to literature and example plants[22, CEFIC, 2000], [6, German UBA, 2000] three example plants listed in this reference.274 Large Volume Inorganic Chemicals – Ammonia, Acids and Fertilisers
6.4.7 Scrubbing of tail gases: fluorides along with SO 2 and CO 2DescriptionChapter 6SO 2 absorption in water is limited, and at low pH resulting from the absorption of HF, SO 2absorption is virtually zero. Nevertheless, the absorption efficiency can be enhanced if a copiousamount of alkaline buffered water is used in a once-through process. This is especially validwhen seawater is used for scrubbing. CO 2 is not absorbed at pH values of 8 or less. In somecircumstances, an oxidative treatment of the waste water may be necessary to oxidise SO 2 intosulphates (with oxygen, hydrogen peroxide). For absorption of HF, see Section 6.4.6.Achieved environmental benefitsSO 2 is converted to sulphites and then oxidised naturally into sulphates after absorption. Anyproblems of excess COD levels in surface waters from the releases are avoided by thisconversion to neutral sulphates. Table 6.11 shows the achievable emission levels.SO 2 levels
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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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Page 252 and 253: Chapter 5Emission of mg/l g/tonne P
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Page 258 and 259: Chapter 55.4.3 Hemi-dihydrate recry
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Page 264 and 265: Chapter 55.4.6 RepulpingDescription
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Page 268 and 269: Chapter 55.4.8 Recovery and abateme
Page 270 and 271: Chapter 5Operational dataNo informa
Page 272 and 273: Chapter 55.4.11 Decadmation of H 3
Page 274 and 275: Chapter 55.4.12 Use of entrainment
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Page 278 and 279: Chapter 5Driving force for implemen
Page 280 and 281: Chapter 5Cross-media effectsTable 5
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Page 291 and 292: Chapter 66.3 Current emission and c
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Page 311 and 312: Chapter 77 NPK AND CN7.1 General in
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Chapter 88.2 Applied processes and
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Chapter 88.2.1.1 Particle formation
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Chapter 8Consumption of Per tonne u
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Chapter 8Per tonne urea Unit Remark
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Chapter 8Waste water per tonne urea
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Chapter 8Pollutant Source g/tonne u
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Chapter 8Plant Emission Amount (ton
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Chapter 8Operational dataSee Table
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Chapter 8Operational dataSee Table
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Chapter 88.4.6 Redirecting fines to
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Chapter 8Existing plantCase 2Revamp
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Chapter 88.4.8 Heat integration in
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Chapter 88.4.9 Combined condensatio
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Chapter 88.4.10 Minimisation of NH
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Chapter 8Other approaches to proces
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Chapter 88.5 BAT for Urea and UANBA
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Chapter 9Country Company LocationBe
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Chapter 99.2.2 NeutralisationThe ex
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Chapter 9Scrubbing devices• packe
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Chapter 9Pollutant mg/Nm 3 g/tonne
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Chapter 99.4 Techniques to consider
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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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