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| Process Summary |
Advanced Regulatory Soot Blowing provides a traditional approach to boiler cleaning by sequencing individual Soot Blowers. However, this offering includes an improved operator interface and diagnostics, which eliminate many of the difficulties, which have been associated with blower operation and maintenance.
Many pulp and paper mills are finding that their Recovery Process is the production bottleneck. Effective Soot Blowing is critical to the maintenance of a high level of Recovery Boiler efficiency and to the avoidance of boiler circulation problems leading to costly unscheduled shutdowns. The Soot Blowing system developed by Automation Applications Inc, LLC (AAI) provides a number of features designed to increase the efficiency of this portion of the boiler operation and help minimize maintenance:
- Operator Control Graphic is presented on a Single Screen
- Extremely Flexible Programming Provided
- Sequences may be Viewed or Modified without Stopping Active Sequence
- Automatic Log of Alarms Minimizes Shutdown Time
- Easily Customizable to Mill Specific Requirements
- Compatible with Commonly Used Control Systems
The Advanced Regulatory Soot Blowing System provides a user with the ability to individually select lances for insertion or to select from a predetermined number of user configurable sequences. Primary operator interface will be the DCS Operator CRT Console. Through a number of custom-built schematics, users have access to all tags necessary to operate the system.
| Features |
- Blowing Control - Enables operator to select an individual blower for insertion and command a manual start. In addition, the system enables the operator to select a blowing sequence from a number of predetermined and preprogrammed sequences.
- Blowing Medium Control - Enables the operator to allow steam for the sootblowers to be controlled automatically or manually.
- Maintenance Control - Enable the operator to put a blower out of service for maintenance from the CRT display. Falgging the blower as out of service will remove the blower from any blowing sequence.
- Abnormal Conditions and Alarming - The following alarms are preprogrammed: Fail to Start, Elapsed Blow Time, Motor Overload, Motor Stall, Low Steam Header Pressure, Boiler Trip, Manual Retract, Pause/Resume and Sequence Abort
- Soot Blowing Graphic Displays - The main schematic consists of a representation of all sootblowers in the boiler displayed in their relative locations. From this display the operator has access to timers, sequence status and maintenance data. The operator also has access to the Individual Blower Control, Sequence Operation, Alarm Monitoring, Timer Settings and Header Monitoring Displays.
| Benefits |
AAI furnishes guarantees of
performance with installations of Soot Blowing system based on a survey of existing operation. Guarantees
typically involve measurable system and process parameters such
as percentage of time on full automatic, and percent steam usage
for soot blowing. AAI is confident that installation of a Soot Blowing
Optimization System will result tangible benefit for the end user
and is willing to back installations with a firm warranty. For
the benefit of the client as well as AAI, it is important that a
set of precisely measurable parameters make up the boundaries for
determining process performance before and after system
installation.
Some typical areas of system performance include:
- 10% Reduction in Soot Blowing Steam Usage
- Automatic Control will be Provided by the System 95% of the Time
| Conclusion |
AAI believes that competitive advantage can be gained by Pulp and Paper Industry Manufacturers through the proper application and use of today's computer and control equipment. This is proved every day by AAI engineers who leverage their technical systems knowledge with process experience to provide clients with significant dollar savings through higher process throughputs and efficiencies. The AAI Soot Blowing Optimization System is a specific example of this.
With this installation a mill can expect reduced energy costs through reduced purchased fuel cost to generate steam in the power boilers. By calculating the cost of steam in the power boilers and comparing it to the reduction of steam use from soot blowing, a mill can save near five-hundred thousand dollars per year.