HTTU - High Temperature Treatment Unit

The High Temperature Treatment Unit (HTTU) by econ industries is an advanced thermal processing solution specifically designed for the safe and efficient treatment of hazardous waste such as spent catalysts, activated carbon, and other kind of waste containing mercury sulphide (HgS) and mercury chloride (HgCl2). Primarily serving industries such as oil and gas and off-gas treatment systems, the HTTU ensures comprehensive mercury removal while enabling the recycling and reuse of valuable resources.

Operating at material temperatures between 700°C and 800°C, the HTTU utilizes high-temperature treatment to effectively break down mercury sulphide (HgS), recovering elemental mercury through a controlled condensation process. During this thermal transformation, sulphur compounds are oxidized to sulphur dioxide (SO₂), which is subsequently captured and neutralized in an alkaline scrubber system. This approach not only removes hazardous contaminants, but also ensures that the treated activated carbon or catalyst is mercury-free, allowing safe reactivation or recycling in future applications.

Flexible Integration and Operational Modes

The HTTU is designed with operational flexibility in mind, allowing it to function either as a standalone unit or if required, in combination with the VacuDry® process:

  • Combined Operation with VacuDry®: When integrated with the VacuDry® process, the treated solid is discharged into a hermetically sealed bunker, which safely transfers the material to the HTTU for further thermal treatment, if required. Alternatively, the material can be directed to a cooling screw conveyor for safe handling.
  • Standalone Operation: In standalone mode, the HTTU can directly process catalysts or activated carbon containing mercury compounds, streamlining the treatment process and reducing overall processing time. This setup is ideal for dedicated waste streams requiring specialized high-temperature treatment.

Greatest benefits of econ HTTU Technology

  • Comprehensive Mercury Removal: Efficiently eliminates mercury compounds, including mercury sulphide (HgS), ensuring compliance with stringent environmental regulations
  • Sulphur Removal for Cost-Effective Metal Reclamation: The oxidation of sulphur compounds facilitates cost-effective metal recovery in downstream processes, maximizing resource utilization
  • Versatile Operational Flexibility: The HTTU can operate either as an integrated part of the VacuDry® system or as an independent processing unit, offering unmatched adaptability for diverse waste treatment scenarios
  • Modular Turn-Key Design: The HTTU is delivered as a modular turnkey solution, simplifying installation and commissioning, while ensuring simple operations and maintenance

Elements of HTTU

  • Feeding unit
  • Thermal treatment unit
  • Discharge unit
  • Off-gas treatment
  • Cooling unit
  • Optional: Wastewater treatment unit
  • Control unit

Flowsheet

Heating methods:

The HTTU offers two different heating methods, tailored to the specific needs of the input material:

  • Indirect Heating via Electrically Heated Screws: In this configuration, a heated screw conveyor ensures homogeneous mixing and heating of the material. The adjustable screw speed controls the residence time, optimizing the extraction of contaminants while minimizing dust carryover to the off-gas system.
  • Direct Fired Thermal Oxidation: Utilizing a high-temperature burner, this method achieves continuous thermal oxidation, effectively breaking down mercury compounds and oxidizing sulphur and hydrocarbons. This direct approach ensures complete decomposition of hazardous components, enhancing the overall efficiency of the process.

Sustainable and Efficient Waste Management

The HTTU by econ industries represents a cutting-edge solution for hazardous waste management, combining high-efficiency mercury removal with resource recovery and recycling. By transforming toxic waste into reusable materials, the HTTU not only minimizes environmental impact but also contributes to a circular economy, supporting sustainable industrial practices.

Contact us at Sales@econindustries.com to discover how the HTTU can enhance your waste management strategy while ensuring safety, compliance, and sustainability.