SCR Ammonia Injection Nozzles:
Engineering Guide for Power Generation NOx Control
Designing an ammonia injection system that achieves uniform NH3 distribution at the catalyst face — across gas turbines, reciprocating engines, and multi-unit power facilities — starts with understanding what the nozzle actually controls and why that controls SCR performance.
Key Takeaways
- NH3 uniformity at the catalyst face — not simply reagent volume — is the primary engineering variable that determines SCR system NOx removal efficiency and ammonia slip performance.
- Air-atomizing nozzles are standard for aqueous ammonia injection: compressed air atomizes the reagent into fine droplets that evaporate rapidly in the hot exhaust stream, generating the gaseous NH3 that reacts at the catalyst.
- Ammonia Injection Grid (AIG) design — lance spacing, nozzle count, injection angles, and zone flow control — is the mechanism through which NH3 uniformity is achieved at the catalyst face despite non-uniform exhaust velocity and temperature profiles.
- Round duct geometries (common on reciprocating engine exhausts) require radial lance injection designs; rectangular ducts (typical of gas turbine installations) use grid-based AIG configurations — each demands a different engineering approach.
- CFD simulation of reagent mixing in the actual duct geometry is the accepted method for verifying that a proposed AIG design achieves the required NH3 uniformity before hardware is built.
- Multi-unit centralized systems — a single storage, dosing, and controls package feeding multiple gensets — require careful hydraulic design to maintain independent flow control and measurement to each injection zone.
For EPC engineers designing SCR systems for power generation facilities — combined-cycle plants, distributed generation with multiple gensets, or industrial cogeneration — the ammonia injection system is the variable that most directly determines whether the SCR meets its permitted NOx emission limits in daily operation. The catalyst defines the potential; the injection nozzle system determines whether that potential is realized.
A catalyst bed with excellent NOx removal kinetics can underperform its rated efficiency by a wide margin if the ammonia-to-NOx ratio is uneven at the catalyst face. Zones with excess NH3 produce ammonia slip — unreacted ammonia passing through the catalyst and entering the atmosphere. Zones with insufficient NH3 produce NOx breakthrough. The emission permit is typically expressed as a single stack outlet value, and a spatially non-uniform inlet condition will produce a weighted average that fails to meet that limit even when the average stoichiometry is correct.
This guide covers the engineering fundamentals of SCR ammonia injection nozzle systems — from nozzle type selection through AIG design, duct geometry considerations, CFD verification, and multi-unit system configuration — to give project engineers the technical framework to specify a system that performs reliably in service.
How SCR Systems Work — and Where Nozzles Fit
Selective Catalytic Reduction reduces NOx (nitrogen oxides) in combustion exhaust by reacting NOx with ammonia (NH3) in the presence of a vanadium, zeolite, or other catalyst at the appropriate temperature. The simplified governing reaction for NO reduction is:
4 NO + 4 NH₃ + O₂ → 4 N₂ + 6 H₂O
The ammonia must be present in the exhaust gas stream upstream of the catalyst in the correct molar ratio to NOx. The injection system's job — specifically the nozzles and the injection grid they are mounted on — is to introduce ammonia into the exhaust stream in the correct quantity and, critically, with the correct spatial distribution to ensure that every point across the catalyst face sees the right NH3/NOx ratio simultaneously.
Reagent is typically supplied as 19–29% aqueous ammonia solution or as urea solution (which thermally decomposes to NH3 in the hot exhaust). Water in the reagent must evaporate before the NH3 reaches the catalyst, and the NH3 must mix thoroughly with the exhaust gas stream before the catalyst. Both of these requirements set minimum constraints on the injection point location relative to the catalyst face — expressed as mixing distance — which the duct engineer must accommodate.
Why NH3 Uniformity at the Catalyst Face Is the Central Design Variable
SCR catalyst reactions are stoichiometric — NOx is reduced in proportion to available NH3 at each local point on the catalyst face. If NH3 concentration is non-uniform across the catalyst cross-section, zones with excess NH3 produce ammonia slip (unreacted NH3 exiting the stack) while zones with deficient NH3 show NOx breakthrough. Because the stack emission limit is a single mixed-gas value, spatial non-uniformity forces the designer to operate at a lower average NH3/NOx ratio to avoid slip — accepting lower NOx reduction — or at a higher average ratio to meet the NOx limit — producing unacceptable ammonia slip. Neither outcome satisfies a tight emission permit. Achieving uniform NH3 distribution, typically characterized as a relative standard deviation (RSD) below 5–10%, is the primary mechanism for achieving both high NOx removal and low ammonia slip simultaneously.
In practice, achieving the required NH3 uniformity in a power generation exhaust duct is complicated by the fact that the exhaust gas itself is rarely uniform. Combustion engines and turbines produce velocity profiles that are peaked toward the center of the duct, with slower gas near the walls. Temperature distributions across the duct cross-section can vary by 50°F or more between zones. These non-uniformities in the gas stream mean that injecting ammonia uniformly by injection point density alone does not produce uniform NH3 concentration at the catalyst — the ammonia is transported preferentially by the faster gas streams and diluted differently in different temperature zones.
The AIG design solution to this is zone-based injection control: dividing the catalyst face into flow zones, measuring or modeling the gas flow rate in each zone, and injecting ammonia in proportion to the NOx mass flow in each zone rather than uniformly by area. This requires multiple independently controlled injection zones, each with its own flow measurement and control, rather than a single-point or simple manifold injection system.
"NH3 uniformity is not achieved by adding more nozzles — it is achieved by putting the right flow through each nozzle in proportion to the NOx load in its zone. That requires zone-based flow control, not just injection point density."
Injection Nozzle Types for SCR Ammonia Systems
Air-atomizing nozzles are the standard for aqueous ammonia injection in SCR systems. They use a co-flowing compressed air stream to atomize the aqueous ammonia solution into fine droplets — typically 50–200 micron Sauter Mean Diameter — that evaporate rapidly in the hot exhaust stream, generating gaseous NH3 for mixing and reaction. The key advantage over direct liquid injection is the ability to produce fine, consistent droplets at the low liquid flow rates typical of reagent injection, which shortens evaporation distance and improves mixing uniformity at the catalyst face.
Air-Atomizing Nozzles (Primary Standard)
Air-atomizing nozzles use a pressurized air stream to shear the liquid reagent into fine droplets at the nozzle exit. The atomizing air and reagent flows are independently controlled, allowing the nozzle to produce consistent droplet size across a wide range of liquid flow rates — a critical property in SCR applications where reagent flow varies with engine load and NOx production rate. Fine droplets (small SMD) evaporate quickly in the hot exhaust, minimizing the evaporation distance required before the catalyst and reducing the risk of unevaporated droplets reaching the catalyst surface.
The atomizing air also contributes momentum to the injection jet, aiding penetration into the exhaust stream and improving lateral mixing. In large duct cross-sections — particularly the 12.5' × 13' rectangular ducts typical of gas turbine installations — adequate jet penetration from each lance is essential to cover the full duct width between injection points.
Direct Liquid Injection Nozzles
Direct injection nozzles — typically hollow cone or full cone hydraulic atomizers — inject aqueous ammonia without supplemental atomizing air, relying on liquid pressure for atomization. They are simpler mechanically but produce coarser droplets than air-atomizing designs at the same flow rates, requiring either higher exhaust temperature for complete evaporation or longer mixing distances. They are most suitable for high-temperature applications (above 800°F) where the exhaust thermal energy alone achieves complete evaporation within the available mixing distance.
| Nozzle Type | Droplet Size | Min. Exhaust Temp | Utilities Required | Best Application |
|---|---|---|---|---|
| Air-Atomizing | Fine (50–200 µm SMD) | ~600°F (315°C) | Compressed air + reagent | Standard choice for most SCR applications; reciprocating engines; variable-load operation |
| Direct Liquid Injection (Hydraulic) | Medium (200–500 µm) | ~750°F (400°C) | Reagent only (higher pressure) | High-temperature gas turbine exhaust; fixed-load operations; where compressed air is unavailable |
| Vaporized NH3 Injection | Gaseous — no droplets | Any | NH3 vaporizer system | Applications requiring shortest mixing distance; small ducts; anhydrous NH3 reagent |
NozzlePro's energy and power generation nozzle collection includes air-atomizing injection nozzles, specialty high-temperature designs, and complete SCR reagent delivery system components.
Ammonia Injection Grid (AIG) Design
An Ammonia Injection Grid is a network of injection lances spanning the exhaust duct cross-section, each carrying multiple ammonia injection nozzles at defined positions and orientations. The AIG distributes reagent across the full duct area at multiple injection points to compensate for non-uniform exhaust gas velocity and NOx concentration profiles, achieving uniform NH3/NOx stoichiometry at the catalyst face. Zone-based AIG designs divide the catalyst face into independently controlled flow zones, with each zone's injection rate proportional to the NOx mass flow rate in that zone — the most effective approach for handling spatially variable exhaust conditions.
AIG engineering begins with a characterization of the exhaust flow field: velocity profile, temperature distribution, and NOx concentration distribution across the duct cross-section at the injection plane. In most practical SCR designs, this characterization comes from CFD modeling of the upstream duct, combustor exhaust, and any flow conditioning elements. The AIG design then allocates injection points and flow rates to each zone to counteract the non-uniformities in the gas field.
Key AIG Design Parameters
- Lance spacing and count: The number of injection lances spanning the duct width, and their spacing, determines the spatial resolution of NH3 distribution. Tighter spacing increases uniformity but adds cost and complexity. CFD analysis quantifies the minimum lance count required for the target NH3 RSD at the catalyst face.
- Nozzles per lance: Each lance carries one or more injection nozzles along its length, positioned to cover different radial zones of the duct. Multiple nozzles per lance are typical in large duct cross-sections.
- Injection angle: Nozzles are oriented to inject against the exhaust flow direction, perpendicular to it, or at an optimized angle. Injection against the flow increases residence time in the duct and promotes mixing; perpendicular injection aids cross-stream penetration. Optimal angle depends on duct velocity and the mixing distance available.
- Zone flow control: Each injection zone is independently controlled via a flow control valve and measurement device, allowing reagent delivery to be adjusted to match actual NOx load distribution in real time or as a function of measured operating conditions.
Round vs. Rectangular Duct Configurations
The duct geometry of each prime mover in a multi-genset power facility determines the AIG configuration and nozzle arrangement. Round and rectangular ducts require fundamentally different injection approaches — and a facility operating both reciprocating engines (typically round ducts) and gas turbines (typically rectangular ducts) requires two distinct AIG designs.
Reciprocating Engine
Round Duct (2.5′ Ø)
Radial lance injection from the duct wall, or central injection lance from one end. Smaller cross-section (≈4.9 ft²) means fewer injection points needed but higher exhaust pulsation demands robust nozzle construction. 650°F typical / 700°F spike exhaust.
15 MW Gas Turbine
Rect. Duct (12.5′ × 13′)
Grid-based AIG across large rectangular cross-section (≈162 ft²). Multiple lances spanning duct width, each with several nozzles. 850°F typical / 900°F spike. Higher exhaust temperature enables direct injection options.
13 MW Gas Turbine
Rect. Duct (12.5′ × 13′)
Same duct geometry as 15 MW unit. Lower NOx mass flow proportional to lower power output — requires independently sized reagent feed to match actual load. Shared AIG design approach with 15 MW unit.
Round Duct Injection Design
A 2.5-foot diameter round duct — typical of a reciprocating engine exhaust riser — presents a compact cross-section (approximately 4.9 square feet) that can often be served by two to four radial injection lances or a single central multi-point injector. The injection challenge in round ducts is achieving uniform coverage of the circular cross-section, including the center, which radial lance injection from the wall reaches less effectively than the wall zone. CFD analysis of the specific exhaust velocity profile for the reciprocating engine model is essential because engine pulsation creates a non-steady flow field that affects mixing differently than the steady turbine exhaust flow.
Rectangular Duct Injection Design
The 12.5' × 13' rectangular duct cross-sections on the gas turbine exhausts (approximately 162 square feet each) require a structured AIG with multiple lances spanning the duct width at defined vertical spacing. A typical design might use 4–8 horizontal lances across the duct height, each carrying 3–6 nozzles spanning the duct width. The number and spacing of lances and nozzles is determined by CFD modeling of the turbine exhaust velocity profile, which varies with turbine load and ambient conditions. Zone-based flow control allows the AIG to maintain NH3 uniformity as the velocity profile changes with load.
Reciprocating Engines vs. Gas Turbines: Key Differences for Injection Design
| Parameter | Reciprocating Engine | Gas Turbine |
|---|---|---|
| Typical Exhaust Temperature | 600–700°F (315–370°C) | 800–1000°F (425–540°C) |
| Exhaust Flow Character | Pulsating — cyclic pressure and flow variation | Steady — continuous turbine exhaust |
| Preferred Duct Geometry | Round exhaust risers; occasionally rectangular at manifold | Rectangular duct typical of HRSG or direct SCR installation |
| NOx Concentration | Higher inlet NOx typical; significant load variation | Lower and more stable inlet NOx; load variation affects flow |
| Preferred Injection Nozzle | Air-atomizing — lower exhaust temp requires fine droplets | Air-atomizing or direct injection — higher temp allows coarser droplets |
| Mixing Distance Required | Longer — pulsating flow and lower temperature slow evaporation | Shorter — high temperature and steady flow aid rapid evaporation |
| AIG Configuration | Radial lances in round duct; or end-mounted multi-point injector | Grid of horizontal lances across rectangular duct cross-section |
| Catalyst Temperature Window | Critical — must maintain exhaust above catalyst light-off temperature at all loads | More latitude — higher exhaust temperatures provide wider operating window |
Exhaust pulsation in reciprocating engines — the cyclic pressure waves from each cylinder firing — creates a challenging injection environment. Nozzle check valves or anti-backflow designs are typically required to prevent exhaust gas from entering the reagent supply line during pressure wave peaks. This is a critical detail that is often overlooked in equipment specifications but is essential for reliable long-term operation.
High-Temperature Material Selection
SCR ammonia injection nozzles operate in an environment that combines high exhaust temperatures (650–900°F in typical power generation applications), chemically active ammonia-water reagent, and the corrosive chemistry of combustion exhaust gases. Material selection must address all three simultaneously.
| Component | Temperature Range | Typical Material | Key Consideration |
|---|---|---|---|
| Injection nozzle body | Up to exhaust spike temperature | 316L stainless steel; 304 SS for lower-temperature service | Must handle thermal cycling as engine starts and stops; aqueous ammonia compatibility |
| Injection lance | Full exhaust temperature | 316L SS or schedule 80 stainless pipe | Thermal expansion — lances must be designed to accommodate differential expansion between the hot lance and the cooler duct wall connection |
| Duct penetration fittings | Exhaust temperature at wall | Stainless steel weld fittings; isolation valve required for maintenance | Lance removal for inspection or replacement without shutting down the duct |
| Nozzle orifice | Operating at reagent temperature until exit | 316L SS; hardened SS for abrasive service | Orifice wear from aqueous ammonia with any suspended solids; regular inspection interval |
| Check valves / anti-backflow | Exhaust temperature | Stainless steel; spring force sized for exhaust pressure pulsation | Critical on reciprocating engine installations to prevent exhaust ingress into reagent system |
Thermal expansion of injection lances is a design detail that requires attention in installation and commissioning. A lance that enters the hot exhaust duct at ambient temperature will expand significantly as it heats to operating temperature — a 316L stainless steel lance at 850°F exhaust will grow approximately 0.1 inches per foot of lance length relative to ambient. Lance installation must accommodate this growth through flexible connections, expansion loops, or guided sliding fits at the duct wall entry point.
CFD Analysis and Mixing Distance Requirements
CFD simulation of ammonia injection models reagent droplet evaporation, gas-phase mixing, and NH3 transport in the actual exhaust flow field — accounting for the velocity profile, temperature gradients, and turbulence of the specific duct geometry. It predicts NH3 concentration distribution at the catalyst face for a proposed AIG design, allowing engineers to verify that the required NH3 RSD is achieved before hardware is committed. Without CFD, AIG designs based on simplified analytical assumptions frequently underestimate the mixing requirements for non-uniform exhaust flows, resulting in poor NH3 distribution at the catalyst, reduced NOx removal efficiency, and ammonia slip — problems that are difficult and expensive to correct after installation.
The mixing distance required between the injection point and the catalyst face depends on the injection nozzle type, droplet size, exhaust velocity and temperature, and the target NH3 uniformity. As a general guideline, air-atomizing injection in a gas turbine exhaust duct at 850°F typically requires 10–20 duct hydraulic diameters of mixing distance for fine-droplet injection. Reciprocating engine exhaust, with its lower temperature and pulsating flow, may require 15–25 hydraulic diameters or more to achieve the same NH3 RSD.
For projects where the duct engineer controls the design — as in Tan's inquiry — specifying the injection system first and then sizing the duct mixing length to accommodate it is the correct sequencing. CFD analysis of the chosen injection system determines the required mixing distance, which the duct designer then accommodates in the overall duct layout. This is more efficient and reliable than the reverse — designing the duct first and then trying to fit injection into whatever length is available.
Multi-Unit Centralized System Design
Power generation facilities operating multiple gensets — reciprocating engines, gas turbines, or a combination — frequently benefit from centralizing common functions of the SCR reagent delivery system: storage, unloading, and primary dosing controls. This reduces capital cost per unit and simplifies operator management compared to fully independent systems for each engine.
Centralized vs. Per-Unit System Scope
- Centralized: Single storage tank (sized for the defined supply interval across all units), single unloading station from delivery truck, primary dosing pump(s) shared across units, single control panel for system-level functions. Distribution manifold feeds each unit's AIG through individual flow control loops.
- Per-unit: Individual injection skids at each engine, including unit-level flow control, measurement, and isolation. These are always required regardless of centralized or distributed philosophy — the question is where the shared vs. unit-specific boundary falls.
Hydraulic Design for Multi-Unit Systems
The critical engineering challenge in a centralized system is maintaining accurate, independent flow control to each unit's AIG across the full range of operating configurations. When 2, 3, 4, or 5 gensets are operating simultaneously at different loads, each unit's AIG requires a different reagent flow rate proportional to that unit's NOx production. The hydraulic design must ensure that the header pressure and individual unit flow control valves can maintain independent control without interaction between units — a condition that requires careful valve sizing and header pressure management.
Providing budgetary pricing for feeding 2, 3, 4, or 5 gensets from a single centralized system — as in Tan's RFQ — requires a modular costing approach: the storage, unloading, and primary pump capacity scale with total genset count, while the per-unit injection skid cost is additive for each unit served.
Requesting a Budgetary Proposal for Your SCR System?
NozzlePro supplies ammonia injection nozzles, AIG lance assemblies, and complete reagent delivery system packages for power generation SCR applications — including CFD study, air compressor package, storage, dosing skids, and controls.
Request a Budgetary Proposal Power Generation NozzlesComplete SCR Ammonia Injection System Scope of Supply
EPC firms and system integrators designing SCR systems for power generation facilities typically look to a specialized nozzle and injection system supplier to provide the complete ammonia delivery package. A full-scope ammonia injection system for a multi-unit power generation facility includes:
- CFD Mixing Study: Computational fluid dynamics analysis of the reagent injection and mixing in each duct configuration (round for reciprocating engines, rectangular for gas turbines), confirming required mixing distance and optimizing AIG lance spacing, nozzle count, and injection angles to achieve target NH3 RSD at the catalyst face.
- Ammonia Storage Tank: Atmospheric storage vessel sized for the defined supply interval (commonly 2 weeks) at maximum combined reagent consumption of all served units. Includes level instruments, pressure relief, containment, and truck connection for aqueous ammonia delivery.
- Unloading Skid: Transfer pump, flow meter, and controls for receiving aqueous ammonia from delivery trucks into the storage tank. Safety interlocks and ventilation provisions for ammonia handling.
- Dosing Pump Skid: Metering pump(s) sized to deliver the maximum combined reagent flow to all served units simultaneously, with turndown capability for minimum load operation. Includes flow measurement, pressure control, and pulsation dampening.
- Dilution Water System: DI water supply skid for blending with concentrated aqueous ammonia to the design injection concentration — reduces injection temperature and improves evaporation characteristics.
- Air Compressor Package: Instrument-quality compressed air supply for air-atomizing nozzles, sized for the atomizing air demand of all AIG injection nozzles at maximum combined load.
- Injection Skids (Per Unit): Individual unit flow control valves, flow meters, pressure gauges, isolation valves, and AIG feed manifold for each genset — providing independent reagent control for each unit regardless of the centralized supply system status.
- AIG Lance Assemblies & Nozzles: Engineered injection lances in the specified duct geometry for each unit, with air-atomizing injection nozzles at the CFD-optimized positions, complete with installation flanges, isolation valves, and thermal expansion provisions.
- Control Panel: PLC-based control system integrating the centralized storage, dosing, and per-unit injection functions, with operator interface, alarm management, DCS communication, and automated reagent flow modulation based on NOx signal and load inputs.
What to Have Ready for a Budgetary Proposal
To prepare a responsive budgetary proposal — including the system scope, multi-unit configuration options, and preliminary CFD requirements — NozzlePro needs the following technical and commercial data. The more complete the data provided, the tighter the budgetary range and the fewer clarification rounds required before a proposal is issued.
SCR Ammonia Injection System RFQ Data Checklist
Engineering the SCR system for a power generation facility? Contact NozzlePro with your unit specifications and we will prepare a budgetary proposal including scope options for centralized multi-unit reagent delivery.
Frequently Asked Questions
What type of nozzle is used for ammonia injection in an SCR system?
Air-atomizing nozzles are the standard for aqueous ammonia injection in power generation SCR systems. They use a co-flowing compressed air stream to atomize the reagent into fine droplets (typically 50–200 µm SMD) that evaporate rapidly in the hot exhaust stream. The key advantage is the ability to produce consistent fine droplets across a wide range of liquid flow rates as engine load varies — a critical property since reagent flow must track NOx production rate continuously. Direct liquid injection nozzles are used in some high-temperature applications (above 800°F) where exhaust thermal energy alone achieves complete droplet evaporation within the available mixing distance.
What is an Ammonia Injection Grid (AIG) and why is it needed?
An AIG is a network of injection lances spanning the exhaust duct cross-section, each carrying multiple injection nozzles at defined positions. It is required because single-point ammonia injection cannot achieve the uniform NH3 distribution needed for high-efficiency SCR performance — exhaust gas velocity and temperature are non-uniform across the duct, and injecting ammonia at one point relies on turbulent mixing to distribute it uniformly, which typically requires more mixing distance than is practical in most installations.
Zone-based AIGs divide the catalyst face into independently controlled flow zones, with each zone's injection rate proportional to the NOx mass flow in that zone. This is the most effective approach for handling the spatially variable exhaust conditions of both reciprocating engines and gas turbines. NozzlePro's power generation nozzle collection includes AIG-compatible injection nozzle designs for both round and rectangular duct configurations.
How is SCR ammonia injection different for reciprocating engines vs. gas turbines?
Reciprocating engines produce lower exhaust temperatures (typically 650–700°F vs. 850–900°F for gas turbines) and pulsating exhaust flow rather than the steady turbine exhaust. Lower temperature means slower reagent droplet evaporation, requiring finer atomization and longer mixing distance. Pulsating flow creates varying velocity and pressure conditions at the injection nozzles, requiring anti-backflow provisions and robust nozzle construction. Round exhaust duct geometries typical of reciprocating engine installations also require different AIG approaches (radial lance injection or end-mounted injectors) compared to the grid-based AIGs used in rectangular gas turbine ducts.
Why is CFD analysis required for SCR ammonia injection system design?
CFD models reagent evaporation, transport, and mixing in the actual exhaust flow field — accounting for non-uniform velocity, temperature, and turbulence that analytical methods cannot adequately characterize. It predicts NH3 concentration distribution at the catalyst face for a proposed AIG design, allowing verification that the required NH3 uniformity (typically RSD < 5–10%) is achieved before hardware is built. Without CFD, AIG designs are based on simplified assumptions that may significantly underestimate the mixing requirements for non-uniform flows, resulting in poor NOx removal and ammonia slip that are costly to correct post-installation. For project inquiries, NozzlePro includes CFD study scope in its full-scope SCR ammonia injection system proposals.
Can one centralized ammonia storage and dosing system feed multiple gensets?
Yes — centralized storage, unloading, and primary dosing functions are commonly shared across multiple gensets in power generation facilities to reduce capital cost and operational complexity. The centralized system includes a single storage tank (sized for the desired supply interval across all units), shared unloading infrastructure, and primary dosing pump(s). Each genset then has its own per-unit injection skid providing independent flow control, measurement, and AIG feed — ensuring that each unit's reagent delivery is independently managed regardless of the other units' operating status. NozzlePro can provide budgetary pricing for 2, 3, 4, or 5 gensets served from a single centralized system, with modular costing that identifies shared vs. per-unit cost components for each configuration.
What information is needed to get a budgetary proposal for an SCR ammonia injection system?
To issue a responsive budgetary proposal (+/- 15%), NozzlePro needs: number and type of prime movers (engines and turbines with rated capacity), exhaust gas flow rate and temperature range per unit, duct geometry and dimensions, inlet NOx concentration and permitted outlet limit, reagent type and concentration, dilution water specification, available mixing distance (or confirmation that NozzlePro will set this via CFD), available utilities (compressed air, electrical), site location, storage interval requirement, number of multi-unit configuration options to price, and performance guarantee requirements. Contact NozzlePro through the form on this page with your project data and we will respond with a proposal scope and timeline.
Engineering an SCR System for Your Power Generation Facility?
NozzlePro delivers complete ammonia injection packages for gas turbines and reciprocating engines — CFD study, AIG lances and nozzles, dosing skids, storage, and controls — with budgetary proposals and performance guarantees for multi-unit power generation facilities.
Request a Budgetary Proposal Power Generation Nozzles
