Many boiler operators firing heavy fouling fuels have trouble keeping super heater surfaces from forming sintered deposits. These often cannot be removed with regular retracts using steam or air as cleaning medium. On the other hand the regular use of water lances is prohibitive because they too often cause unacceptable levels of tube damage. Clyde Bergemann’s Multi Media SmartLance now offers a new solution: It is a retractable sootblower that normally cleans with steam, however, if and when necessary allows the operator to perform a special cleaning cycle during which water is blended into the cleaning stream in controlled amounts to remove any slag build up. When using water the Multi Media SmartLance is designed to keep the thermal impact on the boiler tubes at a minimum by controlling the amount of water that is being applied to the heating surfaces.

In order to ensure optimal cleaning effect and minimal thermal impact during cleaning using water, the SmartLance™ has been designed with two sets of water blowing nozzles.  During the insertion cycle, the lead (forward pointing) water nozzles are activated by a solenoid valve supplying water to the relevant inlet at the rotating seal.  The jet progression velocity (path speed of water across the pendant tube surface) is hence maintained at the optimal level where both jets impinge.  Likewise, during the retraction cycle, the rear-facing (lag) nozzles are activated to clean the opposite side of the pendants in the relevant section being cleaned. The use of dual lead and dual lag nozzles is a necessity for effective and controlled water cleaning for these reasons.

SmartLance™- A SmartClean™ Product The SmartLanceTM is offered as part of Clyde Bergemann’s SmartClean Boiler Cleaning Optimization System. SmartClean will make the decision which cleaning medium is best to use based on the actual cleanliness of the heating surfaces. The Multi Media SmartLance is the most effective AND SAFEST cleaning tool available for heavy-plugging super heaters.

Features

• Cleaning Options: Normal Cleaning: steam/air: Intense Cleaning: steam/air plus water through independent nozzles
• Water nozzles are air purged while on steam cycle.
• Single or dual motor, brushless DC drives provide constant dwell time on the super heater surfaces and controls thermal shock when operated with water.
• Patented indexing varies the position of the nozzles each time the blower is operated for complete cleaning coverage.
• No blow on return travel avoids double impingement of clean wall reducing the risk of tube damage (two water nozzle arrangement only).
• SmartLance uses proven US dual rack-and-pinion drive components reducing the requirement of spare parts stock.
• Rugged assembly with maintenance friendly design concepts to improve access to all components such as gearbox and motor.