BLSDA1W/230W Series Semi-Dry Desulfurization System
Discover the BLSDA Series Semi-Dry Desulfurization System. Achieve >95% SO2 removal with zero wastewater using advanced Spray Drying Absorption technology.
1. Produktübersicht
Advanced Spray Drying Absorption (SDA)
Der BLSDA1W/230W Series Semi-Dry Desulfurization System is a mainstream, highly efficient alternative to traditional high-energy, high-water-consumption wet scrubbing processes. It relies on the precise injection of an atomized alkaline slurry (typically lime) directly into high-temperature flue gas.
This advanced technology achieves rapid moisture evaporation and drying simultaneously with gas-liquid-solid three-phase acid-base neutralization. Acidic sulfur oxides and halides in the flue gas are instantly converted into dry, solid salts.
Engineered as a high-ROI, seamless replacement for premium European models (such as the Alstom/GE SDA systems or Babcock & Wilcox spray dry absorbers), the BLSDA Series achieves desulfurization efficiencies exceeding 95%. Its defining advantage is that no massive wastewater treatment facility is required, making it economically and environmentally superior.
2. Technical Specifications
Main Engineering Parameters
The BLSDA Series provides robust operational flexibility, specifically designed to handle medium to high-temperature emissions and varying dust densities found in utility boilers and kilns.
| Parameterelement | Specification Range | Einheit |
|---|---|---|
| Processing Gas Volume | 10,000 - 2,300,000 | m³/h |
| Zulässige Gastemperatur | 140 - 260 | °C |
| Zulässige Staubdichte am Einlass | 1 - 2,000 | mg/Nm³ |
| System Design Pressure | -6,000 to +6,000 | Pa |
| Betriebswiderstand | 800 to 1,500 | Pa |
| Guaranteed Outlet Emission | < 35 | mg/Nm³ |
3. Reaction Mechanism
Three-Phase Synergistic Control
The core principle relies on the contact between an atomized alkaline slurry (lime) and high-temperature flue gas (140-220°C). It neutralizes sulfur oxides and completely dries the reaction products before they can hit the chamber walls.
Main SO2 Neutralization
The calcium hydroxide slurry atomizes into micro-droplets, creating a massive surface area that instantly absorbs and neutralizes sulfur dioxide into calcium sulfite.
Ca(OH)2 + SO2 → CaSO3 + H2O
Sulfur Trioxide (SO3) Removal
Eine geringe Menge SO3 present in the flue gas is simultaneously neutralized, forming stable calcium sulfate dihydrate and preventing highly corrosive acid mist.
Ca(OH)2 + SO3 + H2O → CaSO4·2H2O↓
Halide (HCl & HF) Removal
Common in waste incineration and kiln flue gases, hydrogen chloride and hydrogen fluoride are absorbed and converted into solid salts that solidify upon droplet drying.
Ca(OH)2 + 2HCl → CaCl2 + 2H2O
4. Key Benefits
Five Unmatched Engineering Advantages
1. Zero Wastewater Discharge
The absolute biggest advantage over wet scrubbers. The liquid phase completely evaporates, leaving only dry powder. No massive water treatment facilities are needed.
2. Exceptional Efficiency
High-speed rotary atomizers create 60μm droplets, maximizing the gas-liquid contact area to routinely exceed 95 percent SO2 removal.
3. Multi-Pollutant Control
Synergistically captures SO2, ALSO3, HCl, HF, and heavy metals within a single reactor pass, streamlining your plant's emission control strategy.
4. No Plume Generation
Because the exhaust gas exits at a temperature well above the dew point, the system operates completely free of the visible white vapor plume typical of wet systems.
5. Lower CapEx & Maintenance
Constructed primarily from carbon steel (avoiding expensive high-nickel alloys). It eliminates the need for complex slurry dewatering equipment like hydrocyclones.
5. System Architecture
System Composition & Process
The BLSDA system integrates thermal dynamics with precision atomization. The structural layout ensures that unreacted slurry droplets do not touch the inner walls of the chamber.
- 1. Zweipfad-Gaseinspritzung
Flue gas enters the absorption tower in two precise upper and lower paths, preventing dead zones. - 2. Atomization & Absorption
Hot gases disperse into the chamber, contacting finely atomized lime slurry droplets. - 3. Bildung von trockenem Pulver
Droplets dry completely before reaching the wall, forming powdery desulfurization products. - 4. Bag Filter Collection
Particulate matter is intercepted, and the purified gas is drawn out by the booster fan.
Slurry Preparation & Handling Subsystems
A highly efficient SDA system relies heavily on the quality and consistency of the lime slurry. Our premium preparation modules guarantee uninterrupted performance.
Slurry Tank Agitator
Heavy-duty mixers installed in the lime slaking tanks to keep particles fully suspended and prevent settling.
Delivery & Circulation Pumps
Wear-resistant, high-pressure pumps lined with advanced polymers. Delivers abrasive lime slurry precisely to the atomizer.
Process Air Fan
Heavy-duty Roots blowers providing stable, oil-free pressurized air support for auxiliary pneumatic conveying.
6. Application Scenarios
Ideal Industrial Deployments
Water-Scarce Environments
Perfect for power plants and industrial facilities located in arid regions or facing strict zero-liquid discharge (ZLD) regulations.
Waste Incineration (WTE)
Highly effective for municipal and hazardous waste incinerators due to its unique ability to simultaneously capture heavy metals, HCl, and HF.
Utility Boilers & Kilns
Suitably designed for treating medium to high-temperature emissions (140-220°C). The treated gas maintains thermal buoyancy without stack reheating.
7. Value & ROI
Why Choose The BLSDA Series?
Notice for Engineering Selection: Mention of premium global brands (such as Alstom, GE SDA, or B&W spray dry scrubbers) is strictly for technical benchmarking to assist engineers. We do not sell counterfeit products. The BLSDA Series is an independently engineered, high-ROI alternative.
| Bewertungsmetrik | Our BLSDA Series | Premium Western SDA | Standard Wet Scrubbers |
|---|---|---|---|
| Desulfurization Efficiency | ≥ 95% | ≥ 95% | 95% - 98% |
| Wastewater Output | Zero (Completely Dry) | Null | Massive Volumes |
| Capital Expenditure | Highly Optimized | Extrem hohe Prämie | High (Anti-corrosion needs) |
| System-Footprint | Moderate & Flexible | Mäßig | Large (Tanks + Dewatering) |
8. Quality Assurance
Global Certifications & EPC Capabilities
Spray Drying Absorption is a sophisticated thermal and chemical process. We guarantee the structural integrity and operational safety of our plants through rigorous international manufacturing standards.
- ISO 9001:2015: Certified manufacturing facilities. Rotary atomizers and bag filters conform to CE safety directives.
- Full-Cycle EPC Services: Complete turnkey delivery: Gas dynamics CFD modeling, vessel fabrication, global logistics, and PLC tuning.
Ready to Eliminate Wastewater?
Provide our engineers with your gas volume and inlet SO2 concentration to receive a tailored CFD analysis.
9. Knowledge Base
Häufig gestellte Fragen
1. What is the difference between Semi-Dry (SDA) and Wet FGD?
Wet FGD uses a high volume of slurry, producing a wet gypsum byproduct and heavy-metal wastewater. Semi-Dry (SDA) uses an atomized slurry that completely evaporates, leaving a dry powder byproduct and generating zero wastewater.
2. What happens to the byproduct powder?
The solid reaction products (calcium sulfite, calcium sulfate, and unreacted lime) are captured by a downstream baghouse filter. It can be used for land reclamation, road base, or safely landfilled.
3. Does the system require a bag filter?
Yes. The bag filter captures the fly ash and reaction dust. Additionally, unreacted sorbent trapped on the filter bags provides a second stage of desulfurization as the gas passes through.
4. How is the slurry atomized?
The BLSDA system utilizes high-speed rotary atomizers or high-pressure dual-fluid nozzles. These precisely break the lime slurry into micro-droplets (average 60μm) to ensure rapid evaporation before hitting the walls.
5. How much water does this system consume?
Water is only consumed to cool the flue gas down to the optimum reaction temperature (close to adiabatic saturation). The overall water consumption is drastically lower than that of wet scrubbing systems.
6. What happens if the gas temperature is too low?
If the inlet gas temperature falls too close to the dew point (below 140°C), the water in the slurry will not evaporate quickly enough. This leads to "wet bottom" conditions, causing severe scaling.
7. Can it remove Hydrogen Chloride (HCl) and Hydrogen Fluoride (HF)?
Yes, exceptionally well. Because calcium hydroxide is highly alkaline, it neutralizes acid gases like HCl and HF with extremely high efficiency. This makes SDA a top choice for waste incineration plants.
8. What maintenance is required for the rotary atomizer?
Maintenance involves routine lubrication, checking vibration sensors, and periodically replacing the wear-resistant atomizer wheels or nozzles due to the abrasive nature of the lime slurry.
9. Are expensive anti-corrosive materials needed?
Generally, no. Because the process is "dry" before the gas reaches the walls, standard carbon steel can be used for the vessel and ductwork, provided the gas temperature is maintained above the acid dew point.
10. How long does manufacturing and installation take?
The engineering and fabrication of the drying chamber and atomizer system typically take 3 to 4 months. On-site installation, including the baghouse and slurry preparation tanks, requires an additional 2 to 3 months.
Eliminate Emissions. Eliminate Wastewater.
Partner with our engineering team to implement a highly efficient, completely dry flue gas treatment strategy for your facility.
