Hadek Protective Systems - Corrosion Resistant Chimney Linings

Hadek Protective Systems is a specialist for the internal protection of power station chimneys and flue gas ducts. Hadek provides its services to utilities with coal, oil or lignite firing power stations, mostly equipped with flue gas desulfurization (FGD) systems. FGD operation creates the need for corrosion resistant chimney linings.

Flue gas desulfurization (FGD) operation

During FGD operation, the flue gas temperature in the power plant chimney will nearly always be below the sulfuric acid dew point. As a result, aggressive condensates are formed within the chimney flue. Due to the lower flue gas temperature, the draft within the chimney is reduced and flues that were under negative pressure before FGD operation will now often be operating under positive pressure. Furthermore, the possibility of FGD bypass operation creates the risk of damaging thermal shocks within the chimney flue.

Acid-resistant barrier chimney lining system

The Pennguard® Block Lining System is Hadek's main product line. The system forms an impermeable, acid-resistant barrier inside the chimney flue.

The Pennguard Block Lining System is based on closed-cell borosilicate glass technology. Lightweight borosilicate glass blocks are manufactured under highly controlled conditions and are attached to the internal steel, concrete or brickwork surface of power plant chimneys, using a durable, flexible adhesive.

Lining systems for new and existing chimneys

The Pennguard Block Lining System is used worldwide in new chimneys and is also frequently used to modify existing chimneys for low temperature FGD operation.

Fuel-resistant lining systems

The Pennguard Block Lining System is suitable for a wide range of fuels, including coal, oil, lignite, petcoke and biofuels, and operating conditions, from low temperature wet flue gas to high temperature untreated gas, even with a high sulfur content.

Lining systems for inlet, outlet and bypass ducts

The Pennguard Block Lining System is also suitable for inlet, outlet and bypass ducts, both for new build and retrofits.

Lightweight, thermally insulating and reliable chimney lining systems

The Pennguard is lightweight, does not require anchors and is thermally insulating. Pennguard linings installed with Hadek's supervision are durable and reliable.

Feasibility studies, engineering, on-site quality assurance, long-term guarantees and performance monitoring

In addition to the Pennguard product, Hadek provides a range of services, including feasibility studies, engineering, on-site quality assurance, long-term guarantees and performance monitoring.