WesTech Engineering, Inc.

- Sludge Heating Systems

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WesTech offers sludge heating solutions for nearly any anaerobic digestion application. From mesophilic to thermophilic, WesTech's versatility and experience ensure that our sludge heating equipment will provide years of dependable service. We can provide heat exchangers to be piped into existing hot water systems or a complete boiler/ heat exchanger package.

Tube-In-Tube Heat Exchangers
The spiral and tube-in-tube models are typically located near the boiler. Sludge is pumped from the digester while hot water is pumped from the boiler. Heat is transferred within the tube-in-tube heat exchanger.

  • Efficient counter flow design
  • Long-term energy savings
  • Large sludge passages prevent clogging


Draft Tube Heat Exchangers
Draft Tube Heat Exchangers provide a unique option for use in digesters that incorporate mechanical sludge mixers. Instead of pumping sludge to a remote heat exchanger, hot water is piped to the heat exchanger mounted on the draft tube of an internal or external sludge mixer. Heat is transferred to the sludge as the mixers circulate flow through the hot water jacket region of the draft tube.

  • Efficient heating and mixing
  • Simple operation and maintenance
  • Cost-effective
  • No sludge pumping required
  • Heat exchanger is wrapped around the draft tube
  • Can be used with internal or external mixers


Combination Boiler / Heat Exchangers
WesTech's experience and design ensure efficient and reliable heating and mixing performance. Our package heating system is dual-fuel capable, using primarily digester gas with a conventional backup fuel source. This allows for efficient use of the valuable biogas produced in anaerobic digestion.

  • Utilize reclaimed energy
  • Skid-mounted units

More about this product — Sludge Heating System

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