Dry Sorbent Injection System (DSI)
Pune, India | Stratgem
Sulfur dioxide (SO₂) and hydrogen chloride (HCl) emissions from industrial processes, especially coal-fired power plants and waste-to-energy facilities, are minimized using dry sorbent injection (DSI) systems — a proven air pollution control technology.
To react with and neutralize acidic gases, these systems inject dry sorbents — typically lime (calcium hydroxide) or sodium bicarbonate — into the flue gas stream.
In simple terms: The DSI system removes metals (Hg, etc.), volatile organic compounds (VOCs), and acid gases (SO₂, SO₃/H₂SO₄, HCl) by injecting calcium- or sodium-based alkaline sorbents into the flue gas.
What is a Dry Sorbent Injection System?
A Dry Sorbent Injection System (DSI) is an air pollution control technology used to reduce acidic gas emissions such as:
- Sulfur dioxide (SO₂)
- Sulfur trioxide (SO₃ / H₂SO₄)
- Hydrogen chloride (HCl)
- Mercury (Hg)
- Volatile Organic Compounds (VOCs)
The system works by injecting dry alkaline sorbents like:
- Lime (Calcium Hydroxide – Ca(OH)₂)
- Sodium Bicarbonate (NaHCO₃)
into the flue gas stream to chemically neutralize harmful pollutants before they are released into the atmosphere.
How Does a Dry Sorbent Injection System Work?
Here is the step-by-step DSI process explained clearly:
Flue Gas Collection
Flue gas from coal-fired power plants, waste incinerators, cement kilns contains acidic pollutants like SO₂ and HCl. This gas stream is directed toward the DSI system.
Sorbent Preparation
Dry sorbents are stored in silos, metered accurately, and sometimes milled or ground to achieve proper particle size.
Sorbent Injection
The prepared sorbent is injected into the flue gas using pneumatic conveying systems and controlled injection nozzles. Injection rate and location optimized for maximum reaction efficiency.
Mixing & Chemical Reaction
Lime reacts with SO₂ → forms Calcium Sulfite / Sulfate. Sodium bicarbonate reacts with acid gases → forms neutral salts. These reactions convert harmful gases into solid compounds.
Particle Capture
The solid reaction products are removed using Electrostatic Precipitator (ESP) or Baghouse (Fabric Filter System), ensuring emission compliance.
Residual Handling
Captured solids are disposed in compliance with regulations, recycled where applicable, or used in construction material applications.
Monitoring & Control
Critical parameters: sorbent feed rate, flue gas temperature, pollutant concentration, pressure & flow — ensures high removal efficiency.
Benefits of Dry Sorbent Injection System
Cost-Effective
Lower capital investment, reduced operating costs, and minimal maintenance vs. wet scrubbers.
Easy Retrofitting
Compact design, minimal structural changes — ideal for existing plants seeking quick compliance upgrades.
Water-Free Operation
No water consumption, eliminates wastewater treatment, reduces corrosion risks — perfect for water-scarce regions.
High Removal Efficiency
Achieves high removal rates for SO₂, HCl, SO₃, and Mercury when properly engineered.
Minimal Waste
Produces dry solid residue instead of liquid waste streams — easier disposal.
Low Maintenance
No complex liquid handling, reduced scaling and corrosion issues.
Applications
Refineries & Petrochemical
Controls sulfur-containing gases during refining processes.
Refining Processes
Cement Plants
High-temperature kilns generate acid gases; DSI neutralizes them efficiently.
Temperature kilns
Coal-Fired Power Plants
Major emitters of SO₂ and acid gases — DSI reduces emissions cost-effectively.
Major emitters
Waste-to-Energy Plants
Controls emissions from municipal and industrial waste incineration.
Controls emissionsDSI Performance Simulator
Interactive Process & Optimization Model
Parameters Configuration
Calculated Outputs
Why Choose Stratgem for Dry Sorbent Injection System in Pune, India?
Stratgem develops and manufactures custom-engineered Dry Sorbent Injection Systems based on plant capacity, emission norms, pollutant concentration, and site-specific requirements.
📋 Services Offered:
- Full-scale material testing
- Field services & start-up commissioning
- Spare parts support
- Performance optimization
🏭 Industries Served:
- Food & Chemicals
- Pharmaceuticals
- Plastics & Minerals
- Power & Cement
Overall, DSI is a versatile technology offering effective reduction of acidic gases and heavy metals, improving air quality and regulatory compliance.
Stratgem develops and manufactures DSI systems tailored to customer specifications.
Stratgem Pune, India offers comprehensive services such as field service, start-up service, full-scale material testing, and spare parts. Among the industries we serve are food, chemicals, pharmaceuticals, plastics, minerals, and others. To know more about the Dry Sorbent Injection System please feel free to connect us!
