19% ammonia injection system for smc - cimentec · 1 10/2/2007 cimentec engineering ltd ammonia...
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10/2/2007 Cimentec Engineering Ltd1
Ammonia Injection
CALCINER AND KILN DUCT RISER
Orientation Session
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Contents
Introduction and PurposeWhy 19% ammoniaEquipment requiredProcess Description-PIDCommissioningMaterial safety information - MSDS
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Introduction and Purpose
To reduce the amount of Nitrogen Oxides emitted into the air. (NOx) NOx are a major source of atmospheric pollutionControl methods involve combustion and post combustion operating practicesSelective Non-catalytic Reduction (SNCR)Selective Catalytic Reduction (SCR)
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Why 19% Ammonia
Ammonia contains Nitrogen and hydrogen (NH3).Is absorbed in the gas/material stream and forms other non harmful compoundsHas been proven to be an effective and inexpensive SNCR method of control NOx emissions. Most effective is in the kiln riser duct.
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Why 19% ammonia
Ammonia solution is 19% by volume, the remainder 81% is water.Also called Ammonium Hydroxide, Aqueous solution, Ammonia Water, Pony p..s.The solution remains toxic to a certain degree – caution when handlingFamiliarization with MSDS
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Injection Equipment
Injection lances Atomizing air and flow control cabinetPiping system for air and ammonia solutionPumping station Storage tank
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Lances
High temperature material - 316 stainlessRequire constant air flow for coolingShould last 8-10 months of operation.Nozzles are easily replaced 2.7 lt/min @ 45-70 psi4.5 mm orifice, 35-40 micron dropletsAir 13.25 scfm @ 70-80 psi
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Lance design
Ammonia tube
Air tube
Nozzle tip
Carbon SealOrifice Valve
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Riser duct lance installation El 116-6” ft
Lance controls
Air header 1”
Ammonia header 3/4”
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Atomizing control cabinet
Atomizing control cabinet
Blue –air
Green-ammonia
Control vlave
Flow transmitter
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Pump skid
Pressure switch
Pressure Regulating Valve
DP Across StrainersPump discharge pressure
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Truck Loading Station
Tank Level Indicator and fill
Valve open/close
Indicating lights
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Process Flow diagram description
Storage tankPump skidAtomizing Control CabinetLances and controls
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PID Diagram
Tank farm Pump skid
Atomizing cabinet
Lances and controls
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Commissioning
Hydrostatic test Water test – simulate the process using waterFine tuning adjustmentsElectrical – groundingMotor rotation verified – connect pumpAnalog and digital signals verified- red/green lights, level display
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Commissioning
Check lance nozzle if free of debrisVerify flow ratesFine adjustment at each lance Balance air/solutionReady to start up
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Start Up
Water was drained?Tank filled with ammonia?Containment space cleaned and cleared!Start the pump – it will take some time to reach the control cabinetThe effect of ammonia injection will take a few minutes to show results. Follow gas analyzer output
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Material safety data sheet
Ammonia SupplierMSDS attached – read Avoid Inhalation, skin contact, eye contactFresh air Use lots of water on the affected area Spill – stop leak, dilute with lots of waterFertilizer, household cleaning, pharmaceutical, lubricants