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Process Optimization: SMART Clean™ for Pulp & Paper

SMART Clean™ Intelligent Sootblowing is a closed loop control system that uses feedback from the heat exchanger, gathered in real-time during normal boiler operation, to effectively clean the recovery boiler heat transfer surfaces

This system intelligently manages the sequence of sootblower operation through the use of a targeted cleaning strategy that saves steam by dynamically managing the sootblowing timing and flow. The SMART Clean™ system utilizes the real-time boiler data to detect build up in specific areas of the boiler.  Once this build up has been identified, the system initiates a localized cleaning events to target the build up with the appropriate intensity. Comprised of an industry leading SMART Controls platform and real time Thermodynamic Modelling (TDM) feedback, the Clyde Bergemann SMART Clean™ system is the ultimate weapon to combat carry over and plugging problems while maximizing the heat transfer efficiency of the recovery boiler.

The SMART Clean™ Process

Clyde Bergemann’s SMART Clean™ process is an iterative and self-teaching process, based on the following steps:

Step 1:  Gather All Information

Boiler process and performance data is gathered from two different types of sources: indirect sources from boiler operations (steam temperatures, flue gas temperatures, etc.) and direct sources from installed sensors.

Step 2:  Interpret the Information

Clyde Bergemann has developed a numerical algorithm to filter the massive volume of data from the DCS and fouling sensors and convert it into boiler fouling information. The incoming data will be verified to ensure only quality information is used to control sootblower operation.

Step 3:  Automated Actuation

Once the analytical process from Step 2 is completed, the system operates selected cleaning equipment that will give the most heat transfer improvement impact for the boiler. Sootblower parameters such as blowing pressure, blowing speed, and zone by zone control are precisely directed according to the local cleaning requirements. 

Step 4:  Measurement and Judgment of Response

Once the particular cleaning devices complete their operations, the SMART Clean™ system evaluates the cleaning effectiveness and uses the information to continuously improve the sootblower cleaning performance.

The SMART Clean™ system will also use the existing flue gas draft differential pressures (DP) as a process variable and will calculate effectiveness for each sootblower on flue gas DP.

 

Variable Pressure / Flow Control Module

A variable flow/pressure module can be added as an option to allow operators the ability to adjust cleaning pressures from the controls system, rather than the poppet valve. Using this, the cleaning pressure can be varied to provide the proper intensity to clean each tube bank differently within the same lance’s path. It can also provide cleaning media savings when used in conjunction with Single Pass Cleaning by reducing cleaning media flow. (Note:  Pressure control valve must be capable of modulating from input of control system).