Dry Sorbent Injection (DSI) System

The Dustex® Dry Sorbent Injection (DSI) System provides a cost-effective solution for the reduction of SOx (SO2, SO3), and HCl from boiler flue gases.

Dry Sorbent Injection Systems involve the injection of a dry sorbent into the flue gas ductwork following the boiler to reduce concentrations of acid gases SO2, HCl and HF which are regulated to prevent acid rain. Sulfur oxides react directly with the dry sorbent, which are collected in a downstream particulate control device. Because a separate scrubber vessel is not needed, capital costs are minimized.

Critical advantages include its low capital cost and a smaller footprint compared to other technologies. Low capital costs are partially offset by lower reagent utilization. In comparison to other systems, their lower capital costs result in higher operating costs for equivalent SO2 removal rates.

Injection Systems Process Flow

With complete design-build, take advantage of Dustex’s experience and expertise for an on-time, quality project completion.

DSI Basics

A Dry Sorbent Injection (DSI) System is an engineered system in which a powdered alkaline sorbent, like hydrated lime or sodium bicarbonate, is pneumatically conveyed from a storage silo and injected into the flue gas exhaust duct and reacts with acid gases to form a salt. The salt is then captured by a fabric filter baghouse or electrostatic precipitator and removed with the dust.

Dry Sorbent Injection (DSI) System Advantages

A Dry Sorbent Injection System is a simple system with low capital cost and high reliability. There are multiple reagents available: Hydrated Lime: Ca(OH2), Sodium Bicarbonate: NaHCO3 and Trona: NaCO3, for acid gas mitigation. Dry Sorbent Injection Systems are generally applied when lower removal efficiencies are required, or on smaller plants where the capital cost for other scrubber types may not be justified. DSI Systems typically provide removal efficiencies for SO2 up to 60% and greater than 99% HCl reduction.

Dry Sorbent Injection (DSI) System Advantages

A Dry Sorbent Injection System is a simple system with low capital cost and high reliability. There are multiple reagents available: Hydrated Lime: Ca(OH2), Sodium Bicarbonate: NaHCO3 and Trona: NaCO3, for acid gas mitigation. Dry Sorbent Injection Systems are generally applied when lower removal efficiencies are required, or on smaller plants where the capital cost for other scrubber types may not be justified. DSI Systems typically provide removal efficiencies for SO2 up to 60% and greater than 99% HCl reduction.

SO2 Reduction with a Dry Sorbent Injection (DSI) System

The reduction of SO2 concentrations utilizing a dry injection system requires lower temperature and more time for optimal reaction than other flue gas constituents. Hydrated Lime reacts with SO2 below 350°F, while Sodium Bicarbonate and Trona become cost effective at higher temperatures.

SO2 Reduction with a Dry Sorbent Injection (DSI) System

The reduction of SO2 concentrations utilizing a dry injection system requires lower temperature and more time for optimal reaction than other flue gas constituents. Hydrated Lime reacts with SO2 below 350°F, while Sodium Bicarbonate and Trona become cost effective at higher temperatures.

Dustex® Standard and Custom Design DSI Systems

Dustex offers a large selection of standard design DSI systems that are based on our years of experience and expertise in SO2, SO3, and HCl mitigation. We have extensive experience and working with companies and their engineering firms’ specifications for DSI systems. So, whether your plant needs are standard or custom, Dustex DSI systems are designed to meet the rigorous requirements of a typical plant environment, and to operate for extended time periods with little or no maintenance. Our standard top-quality components have been chosen for their reliability and cost-effective performance.

Dustex will meet the strict specifications required for your unique application and ensure that it will operate within all limits required. Our team of project engineers and designers will work closely with your engineering team to ensure that all specifications and requirements are built into the DSI System, ensuring seamless integration into the plant where it will be installed.

Standard Features

Skirted Reagent Storage Silo

  • Bin Vent Filter (Silo System)
  • Double Loss-in-Weight (Silo) Feed System with 1% accuracy over time
  • Hopper Fluidization Systems to assure material flow
  • Silo Enclosures (optional)
  • Instrumentation and Controls
  • Stainless Steel Tubing with Morris Couplings
  • Reagent Distribution Injection Lances

Benefits

  • Cost-effective
  • Dependable, proven technology
  • Top quality, utility grade components
  • Effective across a wide range of fuels and plant configurations
  • Standard equipment design to reduce cost and minimize delivery times
  • Designed and built to meet utility and A/E specifications
  • High availability and low maintenance
  • Operational flexibility
  • Fully automated, hands-free operation
  • Fail-safe interlocks and alarms
  • Can be used with multiple reagent types

Standard Features

Skirted Reagent Storage Silo

  • Bin Vent Filter (Silo System)
  • Double Loss-in-Weight (Silo) Feed System with 1% accuracy over time
  • Hopper Fluidization Systems to assure material flow
  • Silo Enclosures (optional)
  • Instrumentation and Controls
  • Stainless Steel Tubing with Morris Couplings
  • Reagent Distribution Injection Lances

Benefits

  • Cost-effective
  • Dependable, proven technology
  • Top quality, utility grade components
  • Effective across a wide range of fuels and plant configurations
  • Standard equipment design to reduce cost and minimize delivery times
  • Designed and built to meet utility and A/E specifications
  • High availability and low maintenance
  • Operational flexibility
  • Fully automated, hands-free operation
  • Fail-safe interlocks and alarms
  • Can be used with multiple reagent types

Stoichiometry Guarantees

Dustex will accurately predict the level of control that our systems can provide for your application and give you the assurance of guaranteed performance. We will evaluate your plant air pollution control figuration, along with the type of boiler and fuel. From this information, we will calculate an acid gas control performance guarantee for the Dustex® DSI system.

Primary DSI Markets Served

  • Power Industry
    • Coal Fired Plants
    • Biomass to Energy
  • Pulp and Paper Mills
    • Coal Fired Boilers
  • Cement Industry

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Dustex - Clean Air Technologies

Dustex is a global supplier of engineered systems that reduce air emissions and improve operational efficiencies. We are at the forefront of engineered solutions for clean air technologies with an exceptional and experienced staff. Our outstanding service combined with our wide breadth of technology allows us to provide practical and economical solutions for our customers that fit their unique needs.

 

Contact Details

Dustex - Clean Air Technologies

Corporate Office

60 Chastain Center Blvd NW, Ste 60
Kennesaw, GA 30144 USA

Send us a message

Dustex is a global supplier of engineered systems that reduce air emissions and improve operational efficiencies. We are at the forefront of engineered solutions for clean air technologies with an exceptional and experienced staff. Our outstanding service combined with our wide breadth of technology allows us to provide practical and economical solutions for our customers that fit their unique needs.

Contact Details

Corporate Office 
60 Chastain Center Blvd NW, Ste 60
Kennesaw, GA 30144 USA

info@dustex.com

770-429-5575

Send us a message

© 2018 Dustex - Clean Air Technologies. All Rights Reserved.

© 2018 Dustex - Clean Air Technologies. All Rights Reserved.