Category: Blog

High fly ash load in the flue gas of waste and biomass incineration boilers causes deposits on the tube bundle heat exhange surfaces. To meet the boiler efficiency and to maintain the required temperatures of the downstream located plant components, the tube bundles must be cleaned periodically. In order to achieve the most constant possible conditions and for safety reasons, the cleaning should be carried out online during the boiler operation and without any personal intervention in the boiler. The cleaning procedures practiced in the plants are described below.

240.000 Tons of natural wood are being processed each year in the biomass boiler located in Nesle (France), where they are being converted into renewable electricity (130 GWh/year), process heat (220 GWh/year) and cooling water (2 GWh/year). The owner AKUO Energy and the operating company CNIM EB hence contribute since 2013 to a reduction of the CO2-emissions of the local industry.

Cokenergy LLC (USA) replaces all the originally installed sootblowers with SPGs for cleaning the Heat Recovery Steam Generators (HRSGs) for the entire sixteen HRSG fleet until the end of 2019. This was decided by the management after completing an evaluation of a 6-month trial run, where the bare as well as the finned tubes were cleaned to satisfaction.

Based on the good experience with the Shock Pulse Generators for boiler cleaning in the presently decommissioned waste incineration plant Real in Lucerne/CH, the operator of the new built plant Renergia in Perlen has again installed the SPGs of Explosion Power GmbH for cleaning of the first three boiler passes. Such operate to the full satisfaction of the customer since 2015.

The combustion chamber of a waste incineration boiler is exposed to corrosive atmosphere where the temperatures can reach up to 1'400°C. It is obvious that the boiler walls must be protected accordingly.

Explosion Power GmbH installed 4 TwinL SPGs into a Supercritical Pulverized Coal Boiler 660 MWel capacity which operate successfully in support of boiler cleaning and keeping the required flue gas outlet temperature within design specifications (inlet to SCR catalyst elements). For the next phase the Thai power producer intents to install additional 4 TwinL SPGs for saving feed water and steam and for cycle optimization.