Frequently asked questions about boiler cleaning and spare parts

Shot cleaning systems are suitable for vertical flue gas passes with horizontally arranged tube bundles. Typical areas of application are superheater and economizer heating surfaces.

Typical applications are biomass, waste, RDF and sewage sludge incineration plants. Thermal oil plants and waste heat boilers downstream of glass melting furnaces are also an option. The decisive factors are the heating surface arrangement and the respective operating conditions.

This version of shot cleaning is not suitable for empty boiler passes, horizontal boiler passes or finned tubes. In very small boiler passes, its use is usually not economical, as conveying, shot distribution and processing require a certain basic effort.

Yes. Shot cleaning systems can also be used with non-aligned tube arrangements. The shot distribution is adapted to the geometry of the tube bundles.

Yes. The heating surfaces are cleaned during boiler operation. No boiler shutdown is required for the regular cleaning cycles.

Soft iron balls with a diameter of up to 8 mm are used. The appropriate size and design are matched to the respective cleaning task.

Yes. Once the balls have passed through the tube bundles, a sizing drum separates them from ash and detached deposits. The balls are then returned to the cleaning cycle.

Cleaning is mechanical and requires neither process steam nor compressed air as a cleaning medium. A blower generates the conveying air required to transport the balls upward.

With suitable control, for example via a frequency converter, the blower output can be adjusted to the actual conveying demand. Depending on the type of plant, blower operation can be limited to the cleaning phases. To avoid condensation, on the other hand, continuous operation may be necessary. The mode of operation is adapted to the respective plant.

No lateral clearance for retracting blow lances is required. Space is needed in particular for the conveying pipe, the shot distribution above the heating surfaces and the shot processing below the boiler pass. The arrangement is adapted to the local space conditions.

Yes. Insulation and heat tracing are adapted to the installation conditions. Especially at low outside temperatures, condensation and buildup must be prevented from impairing the shot circulation.

The conveying blower is designed with sound insulation as standard. Noise protection requirements are taken into account during plant planning.

The basic settings are made during commissioning and optimized during operation. The decisive factors are the fouling behavior, the heat transfer performance and the pressure conditions of the plant. Cleaning durations, pause durations and dosing are adjusted accordingly.

The pressure conditions in the conveying system are monitored. Depending on the design, additional sensors detect the shot flow, the level and temperature in the shot storage tank, and the position and movement of relevant assemblies. These signals make it possible to detect deviations and take them into account in the plant control system.

The shot storage tank heating prevents condensation in the storage tank. This counteracts buildup that can impede the dosing and conveying of the balls.

We support you with the functional description, the coordination of interfaces and the implementation of software and electrical design. Optionally, we supply a control cabinet with Siemens PLC, Siemens HMI and installed software, whose sequences are tested in advance by simulation. A separate software delivery can be agreed individually. The scope of services is defined in the quote.

Regular checks include shot circulation, fill level and possible buildup. In addition, the sizing drum, bearings, conveying pipes, fall pipes and distributors are checked for function and wear. Maintenance intervals depend on the specific design and the operating conditions.

Even shot distribution and the right settings are essential for safe operation. Worn distributors or fall pipes can cause the balls to strike individual spots in a concentrated manner and damage them. Regular wear checks help to prevent this.

Yes. We support you with the servicing, maintenance and optimization of your shot cleaning system and supply suitable spare and wear parts. For a spare parts inquiry, it helps us to have the project number, the part designation, the item number from the parts list and the required quantity.

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