Multi-Pollutant Synergistic Control | SDS Dry Desulfurization System

🌊 Volumetric & Thermal Capacity

• 📉 Gas Volume: 10,000 to 2,300,000 m3/h
• 🌡️ Max Gas Temp: 260 °C
• 🌫️ Inlet Dust Density: 1 to 1500 mg/Nm3
• ⚖️ Casing Pressure: -6000 to +6000 Pa

🎯 Purification Performance

• ✅ Desulfurization Efficiency: > 95%
• ✅ Outlet Emission: < 35 mg/Nm3
• ✅ Operating Resistance: 800 to 1000 Pa
• ✅ Sorbent Fineness: > 1000 mesh (< 15 μm)

🏭 Ideal Target Applications

• 🏗️ Space-Constrained Sites: Ultra-compact footprint
• 🔥 Waste Incineration: Simultaneous acid gas control
• ⚗️ Coking & Glass Kilns: Water-free processing
• 💧 Zero Liquid Discharge: No wastewater treatment

The SDS Working Principle

Flue gas extracted from the process (at 140-260 °C) enters the proprietary Ever-power SDS reactor. Here, ultra-fine sodium bicarbonate (NaHCO3) powder is injected into the gas stream. Upon exposure to high-temperature flue gas, the sorbent rapidly decomposes, “popping” like popcorn to form highly porous, highly active sodium carbonate (Na2CO3). This expanded surface area acts as a chemical sponge, instantly neutralizing SO2, SO3, HCl, and HF.

Core Chemical Reactions:

• Thermal Activation: 2NaHCO3 → Na2CO3 + CO2↑ + H2O
• Main Desulfurization: Na2CO3 + SO2 → Na2SO3 + CO2↑
• Oxidation Side Reaction: 2Na2SO3 + O2 → 2Na2SO4 (Forms stable sodium sulfate)
• SO3 Removal (Plume Elimination): Na2CO3 + SO3 → Na2SO4 + CO2↑

System Composition & Architecture

The BLSDS series is a fully automated, continuous processing loop consisting of the following core modules:

• Vacuum Feeding System: Utilizes a highly automated vacuum loader (001) to transfer raw sodium bicarbonate to the Raw Material Silo (002), eliminating manual labor and dust spillage.
• Classifying Mill: A severe-duty mechanical mill crushes the raw sorbent to an ultra-fine specification of >1000 mesh (below 15 μm). This extreme fineness is the key to achieving >95% efficiency.
• SDS Injection Reactor: Equipped with proprietary mixing components. It creates intense turbulence, extending the gas-solid contact time to >4 seconds for maximum reagent utilization.
• Bag Filter Collector: The chemical reaction continues on the surface of the filter bags. The bags, built to withstand >260 °C, capture the dry sodium sulfate byproduct and fly ash, releasing purified gas to the ID fan.

Zero Water Consumption

The SDS process is 100% dry. It requires absolutely zero makeup water, produces zero wastewater to treat, and entirely eliminates the highly visible, corrosive “blue plume” associated with wet scrubbers.

Low Reagent Cost

The system utilizes domestic, readily available sodium bicarbonate. By milling it to <15 μm on-site, the reactive surface area is maximized, driving down stoichiometric consumption rates and drastically lowering daily OPEX.

Unparalleled Uptime

Wet systems suffer from slurry scaling, nozzle plugging, and severe corrosion. The Ever-power SDS system handles only dry powder and hot gas, extending equipment life exponentially and eliminating unplanned maintenance shutdowns.

The Catastrophe of Wet Scrubber Corrosion

Operating wet scrubbers (WFGD) introduces saturated, acidic moisture into your downstream exhaust systems. If flue gas temperatures drop below the acid dew point, concentrated sulfuric acid condenses on your ductwork and chimney stacks. This aggressive corrosion can eat through steel structures in months, causing millions of dollars in repair costs and halting production. Dry SDS eliminates moisture entirely, protecting your physical plant assets.

The “Blue Plume” and Regulatory Surveillance

Wet systems struggle to capture fine SO3 acid mist, which escapes the stack as a highly visible, toxic blue or yellow plume. This immediately attracts public complaints and intense regulatory scrutiny. Furthermore, new environmental mandates enforce strict limits on multi-pollutants (HCl, HF). The Ever-power SDS system chemically neutralizes SO3, HCl, and HF instantly, rendering the stack exhaust completely invisible and legally compliant.

Waste Incineration & Biomass

Municipal solid waste (MSW) and hazardous waste incinerators generate highly complex off-gases rich in HCl, HF, and SO2. SDS is the globally recognized standard for treating these aggressive acidic streams simultaneously.

Coking Plants & Steel Mills

Perfect for coke oven flue gas and sintering processes. The dry method ensures no temperature drop, allowing the purified gas to be exhausted directly or sent to downstream heat recovery systems.

Glass & Ceramic Kilns

These industries require compact footprints and cannot accommodate wastewater infrastructure. SDS provides plug-and-play compliance for continuous high-temperature kilns.

For over 20 years, Ever-power has been the trusted engineering authority in heavy industrial air purification. Designing an SDS system requires precision fluid dynamics to ensure perfect gas-solid mixing. It is a science we have perfected.

• ✔️ Full Value-Chain Integration: We are true EPC contractors. We deliver Process Engineering ➔ Proprietary Mill & Reactor Manufacturing ➔ Turnkey Site Installation ➔ Intelligent Commissioning.
• ✔️ Proven by Industry Giants: Our bespoke dry scrubbing systems successfully safeguard the compliance of massive conglomerates, including Tongchuan Shengwei, Shanshui Group, and major municipal waste facilities.
• ✔️ Proprietary Technology: We utilize advanced classifying mills yielding <15 μm powder, coupled with our patented SDS injection lances that guarantee >4 seconds of residence time, pushing efficiency beyond standard limits.

The Cost of Obsolete Wet Systems

• Wastewater Nightmare: Wet scrubbers produce highly toxic, heavy-metal laden wastewater. Building and operating a Zero Liquid Discharge (ZLD) treatment facility can cost millions annually.
• Corrosion Maintenance: Acid dew point condensation ruthlessly destroys ID fans, ductwork, and stacks, causing catastrophic replacement costs and extended plant downtime.

The Ever-power Upgrade ROI

• Zero Water OPEX: No water usage, no slurry pumps, no vacuum filters, and no wastewater treatment. The operational electricity and maintenance savings alone justify the CapEx within 2-3 years.
• Byproduct Utilization: The resulting dry sodium sulfate powder is stable and can often be safely landfilled or sold for secondary industrial uses, completely bypassing sludge handling costs.

🇨🇳 Shanxi Coking Group (China)

Application: Coke Oven Flue Gas

Challenge: Required simultaneous removal of SO2 and dust without dropping the gas temperature, allowing downstream SCR denitrification to operate efficiently.

Solution: Installed the Ever-power BLSDS Series followed by a high-temp baghouse. Achieved SO2 < 15 mg/Nm3. The dry process preserved the gas heat, perfectly protecting the SCR catalyst.

🇮🇳 Mumbai Municipal Waste (India)

Application: Waste Incineration (WTE) Exhaust

Challenge: Lethal spikes of HCl and HF gases causing severe corrosion in previous semi-dry towers, coupled with strict urban emission limits.

Solution: Retrofitted with our SDS injection system. The ultra-fine milled sodium bicarbonate instantly neutralized the acid spikes. Stack emissions became totally invisible, solving civic complaints.

🇧🇷 Rio Glass Manufacturing (Brazil)

Application: Float Glass Kiln

Challenge: Extremely tight factory footprint with absolutely no space for water treatment infrastructure.

Solution: The ultra-compact SDS reactor was installed directly into the existing ductwork. The fully automated vacuum feeding system required zero manual handling. Compliance achieved with zero added footprint.

🇩🇪 Bavaria Ceramic Works (Germany)

Application: High-Temperature Ceramic Kiln

Challenge: Intermittent HF and SO2 emissions. Previous lime-based injection struggled with low reactivity.

Solution: Switched to Ever-power’s Sodium Bicarbonate system. The classifying mill ensured <15 μm particle size, boosting reactivity. Sorbent consumption dropped by 45% compared to hydrated lime.