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Selective Non-Catalytic Reduction (SNCR) | BLSNCR1W/BLDJ100W Series

Eradicate Nitrogen Oxides (NOx) directly within your boiler furnace without the exorbitant capital and maintenance costs of massive catalyst beds. Engineered by Ever-power, our SNCR system leverages high-precision atomization and advanced computational fluid dynamics to inject reducing agents exactly into the 850°C-1050°C thermal window. Guarantee strict environmental compliance, achieve robust NOx reduction, and eliminate secondary pollution with zero aerodynamic pressure drop.

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⚙️ Executive Engineering Brief

🌊 Volumetric & Thermal Capacity

Gas Volume: 10,000 – 1,000,000 m³/h
Allowable Gas Temp: 850 – 1050 °C
Reducing Agent: Ammonia Water / Urea
System Pressure Drop: 0 Pa (In-furnace)

🎯 Purification Performance

Denitrification Efficiency: 40% – 50%
Ammonia Slip: Strictly Controlled
Reaction Time: Rapid thermal decomposition
Secondary Pollution: Zero solid waste generation

🛡️ Injection & Utility Specs

Lance Flow Rate: 20 – 100 L/h per nozzle
Ammonia Water Pressure: 0.3 – 0.6 MPa
Compressed Air Pressure: 0.3 – 0.6 MPa
Control: Automated PLC tracking system

📊 Main Technical Specifications

The Ever-power BLSNCR1W/BLDJ100W Series is engineered for maximum reagent utilization and minimal ammonia slip. Below are the standard operational metrics, highly customizable based on the precise fluid dynamics and thermal gradient of your specific boiler architecture.

Parameter	Specification Range	Engineering Impact & Plant Value
Processing Gas Volume	10,000 – 1,000,000 m³/h	Highly versatile application range covering small industrial kilns up to medium-sized thermal power plant boilers.
Allowable Gas Temperature	850 – 1050 °C	The critical thermal window. Within this precise zone, SNCR effectively reduces NOx without needing an expensive catalyst.
Denitrification Efficiency	40 – 50%	Achieves massive NOx reductions with vastly lower CapEx compared to SCR. Provides the fastest route to compliance.
Lance Flow Rate	20 – 100 L/h	Precision metering ensures exact stoichiometric ratios of reductant are injected, avoiding wasteful chemical operational costs.
Ammonia / Air Pressures	0.3 – 0.6 MPa	High-pressure dual-fluid atomization guarantees micro-droplets that deeply penetrate the dense flue gas stream for perfect mixing.

🔬 Denitrification Process Introduction

Ever-power is dedicated to providing efficient and reliable turnkey denitrification solutions for complex industrial flue gas treatment. Selective Non-Catalytic Reduction (SNCR) is a mature, highly commercialized post-combustion NOx control technology designed to rapidly reduce emissions without altering the primary combustion process.

Unlike Selective Catalytic Reduction (SCR) technologies that demand massive structural steel reactor housings and expensive, fragile catalyst beds that are easily blinded by dust, SNCR elegantly utilizes the high-temperature zones of the furnace and flue duct themselves as the chemical reactor. By injecting an amino-containing reducing agent directly into the appropriate thermal window, the process achieves robust NOx destruction with a relatively low initial capital investment and a remarkably short construction period.

Honed through numerous successful engineering projects, the BL series has established itself as a technical benchmark. It serves key industrial sectors including steel, coking, power generation, cement, and chemical engineering, acting as the primary defense line against nitrogen oxide pollution.

🏗️ Product Structure

The Ever-power SNCR system is a highly integrated, automated architecture designed to precisely manage chemical reagents and inject them safely. The complete system consists of highly coordinated modular skids:

1. Unloading and Storage Module: Secure, isolated tanks equipped with vapor return lines to safely receive and store the bulk liquid reducing agent (Ammonia water or Urea solution).
2. Metering and Distribution Module: The central fluid hub utilizing multi-stage centrifugal pumps and precision flow meters to dynamically allocate the exact required volume of reagent to each specific injection zone.
3. Injection Module: Specially engineered, heat-resistant dual-fluid spray lances inserted directly into the high-temperature furnace walls, protected by cooling air shields.
4. Compressed Air Module: Provides the high-pressure kinetic energy required to shear the liquid reagent into a microscopic mist for immediate evaporation.

5. Soot Blowing System: Prevents ash bridging and nozzle encrustation near the injection ports, maintaining clear aerodynamic pathways inside the furnace.
6. Flue Gas Duct System: The existing architecture of the boiler which doubles seamlessly as the chemical reaction vessel for the SNCR process.
7. Electrical and Control Module: An intelligent PLC brain that integrates with the plant’s Continuous Emission Monitoring System (CEMS) to automatically track and adjust injection rates in real-time based on load fluctuations.

🔄 Working Principle

The fundamental chemistry of Selective Non-Catalytic Reduction relies on a critical, narrow temperature window. In the complete absence of a catalyst, and specifically within a temperature range of 850°C to 1050°C, the system injects an amino-containing reducing agent directly into the furnace.

At these intense high temperatures, the reducing agent decomposes rapidly into highly active ammonia radicals, which then selectively react with the Nitrogen Oxides (NOx) present in the raw flue gas.

Core Chemical Reduction Reactions:

4NO + 4NH3 + O2 → 4N2 + 6H2O

2NO2 + 4NH3 + O2 → 3N2 + 6H2O

The Thermal Knife-Edge: The 850-1050°C window is highly unforgiving. If the reagent is injected below this temperature, the reaction kinetics stall, causing unreacted ammonia to “slip” out of the boiler. This ammonia slip risks secondary pollution and causes severe fouling of downstream air preheaters by forming ammonium bisulfate. Conversely, if injected above this temperature, the ammonia simply combusts (oxidizes) with oxygen, ironically generating more NOx. Ever-power’s precision control system constantly maps the boiler load to shift injection tiers, ensuring the chemical always hits the perfect thermal zone.

⚠️ Why is High-Efficiency Denitrification Imperative?

The Environmental & Health Devastation of NOx

Nitrogen Oxides (NO and NO2) are primary precursors to severe ecological destruction. When released into the atmosphere, they react with sunlight to form low-level ozone and suffocating photochemical smog, triggering severe respiratory crises in urban populations. Furthermore, NOx mixes with atmospheric moisture to create nitric acid—acid rain—which decimates crop yields, acidifies fresh water bodies, and aggressively corrodes infrastructure. Controlling NOx is central to global public health.

Ruthless Global Emission Standards

Consequently, global regulatory authorities (including the EPA, European Environment Agency, and China’s MEE) have instituted uncompromising emission mandates. Limits are consistently plummeting, frequently demanding outlet concentrations far below 50 mg/Nm³ in special designated regions. Exceeding these limits triggers automated telemetry alerts to regulators, resulting in crippling daily fines, forced production shutdowns, and the potential revocation of your operating license. Reliable denitrification is your fundamental license to operate.

🚀 Design Features & Advantages

Zero Aerodynamic Pressure Drop

Unlike catalytic systems that force massive volumes of flue gas through dense ceramic honeycombs (creating massive aerodynamic resistance), SNCR injects reagent directly into the open furnace space. This results in exactly 0 Pa pressure drop, saving you immense Induced Draft (ID) fan electricity costs over the lifetime of the plant.

Total Dust & Poison Immunity

High concentrations of fly ash, alkali metals, and arsenic will rapidly blind and chemically poison expensive SCR catalysts, rendering them useless. SNCR operates entirely non-catalytically, making it completely immune to dirty, abrasive, or heavily poisoned flue gas streams.

Advanced CFD Thermal Modeling

We do not guess where to place nozzles. Ever-power utilizes advanced Computational Fluid Dynamics (CFD) to map the internal temperature and velocity profile of your specific boiler. This ensures nozzles are strategically placed exactly within the optimal thermal window, maximizing reduction and minimizing slip.

🏭 Typical Application Scenarios & Industry Fit

Industrial Boilers (Coal/Gas/Oil)

Perfectly suited for small and medium-sized industrial boilers, as well as smaller units in thermal power plants. In these scenarios, the massive capital expenditure and space requirements of an SCR reactor tower are economically and physically unfeasible.

Waste-to-Energy (WTE) Incinerators

Municipal solid waste combustion generates severe heavy metals, complex chlorides, and alkali dusts that destroy catalysts almost immediately. SNCR safely injects reagent directly above the grate, providing excellent denitrification without any risk of equipment degradation.

Cement Kilns & Glass Furnaces

The cement pre-calciner inherently provides the perfect temperature window and intense turbulent mixing environment. Because the dust loads in cement production are astronomical, SNCR is the absolute global standard for cement plant NOx control.

🏆 Successful Case Showcase

Shanshui Cement Group (China)

Application: 5000 TPD Clinker Line

Challenge: New regional standards required NOx to drop below strict limits. The heavy dust load made SCR installation completely unviable.

Ever-power deployed a multi-zone SNCR system in the pre-calciner. Utilizing precise ammonia water injection, the plant achieved a stable 45% reduction, maintaining emissions well within regulatory limits without any catalyst investment.

Huarun Power Cogeneration (China)

Application: 2x 300MW CFB Boilers

Challenge: Required a highly responsive denitrification system that could track rapid grid load dispatching without causing ammonia slip.

Our intelligent PLC predictive feed-forward control successfully mitigated NOx spikes during rapid boiler ramping. The zero-pressure drop of the SNCR system saved the plant significant ID fan power costs annually.

⚖️ Equipment Core Advantages vs. Traditional SCR

Comparison Metric	Ever-power SNCR	Traditional SCR
Initial CapEx Investment	Very Low. Uses the existing boiler as the reaction vessel.	Extremely High. Requires massive external steel reactor housings.
Catalyst Replacement Cost	Zero. Operates non-catalytically.	Massive OPEX. Catalysts degrade and cost hundreds of thousands to replace.
System Pressure Drop	0 Pa. No interference with boiler draft.	High (800-1200+ Pa). Severely increases ID fan energy load permanently.
Construction Period	Very Short. Skid-mounted rapid deployment.	Long. Requires extensive heavy civil and structural engineering downtime.

📐 Selection Guide: Architecting Your SNCR

To engineer the precise SNCR distribution and injection system for your specific boiler geometry, our technical team must conduct a comprehensive fluid dynamics assessment. Please prepare the following operational data:

1. Boiler Specifications & Thermal Profile

Provide the Boiler Type (CFB, Pulverized Coal, Grate, Kiln), generation capacity (t/h or MW), and critically, the physical dimensions of the furnace. We require the Temperature Gradient Map to identify exactly where the 850°C-1050°C window resides during 100%, 75%, and 50% operating loads to plan multi-level nozzle insertion points.

2. Baseline NOx & Target Emissions

What is the current, untreated Baseline NOx Concentration (mg/Nm³) and your exact Regulatory Target Limit? This calculates the necessary reduction efficiency, directly governing the sizing of the metering pumps and the required reagent flow rates.

3. Reagent Preference & Utilities

Do you intend to use Solid Urea (safer transport but requires dissolving equipment) or Aqueous Ammonia (requires hazardous chemical safety protocols)? Furthermore, verify your site’s compressed air capacity (0.3-0.6 MPa) for the dual-fluid atomizing lances.

💰 Value Quantified: Return on Investment (ROI)

The Cost of Inaction or SCR Oversizing

Crippling Fines & Shutdowns: Exceeding NOx telemetry limits triggers automated, devastating regulatory fines and forced curtailment of profitable plant operations.

Massive Unnecessary CapEx: Installing SCR on a high-dust boiler or cement kiln will result in rapid catalyst blinding. You will spend millions on initial steelwork, suffer massive continuous ID fan energy penalties, and be forced to replace dead catalyst blocks annually at exorbitant costs.

The Ever-power SNCR Upgrade ROI

Fractional Capital Cost: SNCR requires no structural reactors, foundations, or catalysts. The initial investment is a fraction of an SCR system, often achieving payback within the first year simply by avoiding regulatory fines.

Zero Pressure Drop Energy Savings: Because SNCR injects into the open furnace, it adds absolute zero aerodynamic resistance. This saves hundreds of thousands of dollars annually in ID fan electricity compared to forcing exhaust gas through dense SCR catalyst beds.

🌍 Global Client Scenarios

🇺🇸 Midwest Bio-Energy (USA)

Application: Biomass Power Boiler

Challenge: Biomass fuels caused severe alkali metal poisoning in their previous SCR catalyst, destroying it in 6 months.

“Ever-power’s SNCR bypassed the catalyst issue entirely. The wall-mounted lances handle the high-alkali environment flawlessly. We’ve maintained strict EPA compliance without spending a dime on catalyst replacement.” – Plant Manager

🇩🇪 Ruhr Valley WTE (Germany)

Application: Municipal Solid Waste Incinerator

Challenge: Rapidly fluctuating calorific values in MSW caused wild temperature swings, making NOx control unstable.

“The intelligent predictive PLC system from Ever-power is remarkable. It actively tracks the combustion temperature zones, shifting urea injection tiers instantly. We never fail our telemetry audits.” – Chief Environmental Engineer

🇮🇳 Gujarat Cement Works (India)

Application: 6000 TPD Pre-calciner

Challenge: Required urgent compliance with new NOx mandates, but lacked the budget and shutdown window to install massive SCR steelwork.

“The skid-mounted SNCR was installed and commissioned in under 3 weeks. It was a plug-and-play solution that dropped our NOx by 60% immediately. Absolutely brilliant engineering.” – Operations Director

🇧🇷 Sao Paulo Industrial Steam (Brazil)

Application: Industrial Coal-Fired Boiler

Challenge: Previous poorly designed SNCR system caused massive ammonia slip, plugging the air preheater with ammonium bisulfate.

“Ever-power’s CFD modeling re-mapped our injection ports. The dual-fluid atomization is so fine that the urea evaporates instantly. Ammonia slip dropped below 5 ppm, and our air preheater plugging vanished.” – Maintenance Lead

❓ Engineering & Operational FAQ

What causes “Ammonia Slip” and how do you prevent it?

Ammonia slip occurs when unreacted ammonia escapes the boiler. It is highly problematic because it reacts with SO3 downstream to form sticky ammonium bisulfate, plugging air preheaters. We prevent slip by using advanced CFD to ensure reagent is injected strictly into the optimal 850°C-1050°C zone, utilizing high-pressure dual-fluid atomization for instantaneous evaporation and complete reaction before the gas cools.

Can SNCR reach the ultra-low emission levels of SCR?

Standalone SNCR typically achieves 40%-50% reduction, which is highly effective but lower than SCR (>90%). If local regulations demand ultra-low, near-zero emissions, we often deploy an SNCR-SCR hybrid system. SNCR does the heavy lifting cheaply, and a much smaller “trim” SCR unit finishes the purification, saving immense capital compared to a full SCR build.

What happens when the boiler load changes rapidly?

When boiler load drops, the temperature window shifts lower in the furnace. Our intelligent PLC system anticipates these load changes via CEMS and boiler load data integration. By utilizing multiple tiers of injection lances, the PLC automatically shuts off upper lances and activates lower lances, tracking the thermal window to maintain continuous, uninterrupted denitrification.

Will the injection lances melt inside the 1000°C furnace?

No. The lances are fabricated from extreme-temperature alloys (such as Hastelloy or 316L Stainless Steel) and are engineered with a continuous protective cooling air shield around the nozzle tip. This prevents both thermal melting and ash encrustation, ensuring long-term durability.

How long does it take to install the SNCR system?

Because the BLSNCR1W series is highly modular and skid-mounted, the bulk of assembly is completed in our factory. Site installation merely requires mounting the skids, piping to the boiler wall, and integrating the control panel. Projects are typically commissioned within a few weeks, with minimal disruption to boiler operation.

🔗 Comprehensive Plant Environmental Solutions

Beyond NOx abatement, Ever-power architects industry-leading gas treatment systems for complex chemical, particulate, and organic emissions across all heavy industries:

Advanced VOC Treatment Systems – Total lifecycle solutions for industrial organic emissions.
RTO (Regenerative Thermal Oxidizer) – High thermal efficiency destruction of massive volume VOCs.
RCO (Regenerative Catalytic Oxidizer) & CO (Catalytic Oxidizer) – Low-temperature catalytic oxidation.
TO (Thermal Oxidizer) – Direct-fired high-heat incineration for extreme concentration waste.
Learn more about our legacy and engineering ethos: About Ever-power.
Visit our homepage: Ever-power Global.

Eradicate NOx & Protect Your Profitability

Stop risking catastrophic regulatory fines and avoid sinking millions into excessive SCR catalyst beds. Let Ever-power’s senior engineering team map your furnace and design a bespoke SNCR system that guarantees robust NOx compliance with zero operational pressure drops.

Get Your Custom Engineering Sizing Quote

Selective Non-Catalytic Reduction | BLSNCR1W/BLDJ100W Series