Burner Systems or Rotary Kilns
BURNER SYSTEMS foR RoTaRY kilNS
State o the Art Burner Systems The combustion system is a key element in ecient thermal processing o ores, minerals, and similar bulk solids in a rotary kiln. The process requirements are stringent in a variety o thermal
Gas Inlet
processing systems such as in coke calcining, limestone calcining, recovery o lime in pulp mills, and the combustion o wastes to name a ew.
Shape Air
Swirl Air Oil Inlet
2 Way adjustable burner mount
Gas Orce Ring Adjustable Pilot Assembly
Reractory Covered Stainless Steel Burner Pipe
Outer Air Vane
Spark Ignited Gas Pilot
The burner system is an important and an integral component o a rotary kiln system to optimize the combustion o uels to release heat in the kiln. Saety considerations, ease and exibility o operation, product quality, energy eciency, maintenance costs, and the environmental impact o the products o combustion are some o the most critical areas that a kiln operator must evaluate in selecting a kiln burner. Metso, with over hal a century o experience in designing and manuacturing rotary kiln-based thermal processing systems, has the technical expertise and capability to provide rotary kiln operators with a kiln burner system that best meets their requirements. Since 1950 Metso has successully engineered and supplied more than 300 burner systems 2
Kiln Burners – engineered or specic job requirements All burner systems are designed based on Metso’s vast burner experience. When designing a burner system, Metso’s engineers consider: the process, primary and secondary air momentum, system temperature prole requirements, and emissions requirements. Reduced NOx emissions and optimum ame shape is achieved with the use o two primary air chambers. •
•
Multi-uel capability designed to handle gas, oil, pulverized coal, petroleum coke, or non-condensible gases separately or in combination are available. Flame is directional adjustable, and ame shape control is obtained by dual air channels.
BURNER SYSTEMS foR RoTaRY kilNS
A typical gas valve train
•
•
•
Low primary air design is used to maximize uel eciency and energy recovery rom auxiliary cooling devices. Design eatures include mechanical or steam atomization o oil and sturdy, rugged construction or high temperature duty. Burner systems range from preheat to 300 MBtu/hr. (315 GJ/hr.).
Engineered and custom designed valve trains or sae, ecient, reliable combustion are provided Valve drains are pre-piped and pre-tested and shipped as an assembled module ready or connection to customer’s piping and wiring. Engineered pump and heater sets or heavy oil ser vice or or light oil duty, in simplex or duplex models are available.
Typical burner management system
Burner system management •
•
•
•
Flame saeguard, and burner management systems are designed specically or applications to rotary kilns ring gas, oil or solid uels. Programmable Logic Controlled (PLC) systems perorm all required limit checking and operator input checking during burner light-of.
•
•
Systems provide increased diagnostics and ease o operation, exibility and space savings. Systems conorm to FM, CSA, Ontario Hydro, NFPA, and IRI.
Alpha-numerical message display on local ame saeguard panel guides operators through burner start-up procedure. Remote start/stop capabilities can be provided to the plant Distributed Control System (DCS).
Metso can design a ring system or your application.
3
BURNER SYSTEMS foR RoTaRY kilNS
Burner combustion system The Metso combustion system is designed with the exibility to suit the ollowing specifc kiln fring applications: Wide selection o components including burner, primary air an, uel valve trains, pumps and heater sets, fame management system with panel. Single or multiple uels. Steam or mechanical uel oil atomization. •
•
•
Maximum fame shape and location control or optimum kiln perormance Based on the extensive feld experience o Metso engineers, the critical actors o ame shape and location to complement kiln internals is applied to burner design. Burner design eatures include single or dual primary air path, dual (axial and radial) natural gas paths, easily changeable uel oil nozzle, adjustable uel nozzle to primary air nozzle relationship, and easily adjustable burner mount and primary air ow.
The Metso Non-Condensible Gas (NCG) The NCG incineration gun is a separately mounted and separately aimable assembly to conorm with our experience that NCG introduction via the main kiln burner is detrimental to main ame development and space controls, as well as to overall process control. Separate NCG introduction and placement o the NCG stream in relation to the main ame enables proper main ame development and achievement o peak temperature, resulting in stable kiln operation and maximum incineration o the NCG’s thus minimizing TRS emissions. NCG incineration gun eatures include separate gas paths or each NCG stream to be incinerated, outer cooling air path, 316 stainless steel construction or parts in contact with NCG’s, 304 stainless steel outer cooling air blast pipe with 3” thick insulating castable lining, anged connections or NCG and cooling air paths, mounting ange with adjusting mounting screws, and a cooling air an. A typical pulverized fuel/gas burner
4
BURNER SYSTEMS foR RoTaRY kilNS
5
•
•
•
•
•
•
•
•
•
Metso Minerals Industries Inc., 350 Railroad Street, Danville, PA 17821-2046 USA Phone: +1 570 275 3050, Fax: +1 570 275 6789 Metso Minerals Industries Inc., P.O. Box 15312, York, Pennsylvania, 17405-7312 USA Phone: +1 717 843 8671, Fax: +1 717 845 5154 Metso Minerals Canada Inc., 1197 Ballantry Road, Oakville, ON L6H 5M7, Canada Phone: +1 905 337 8811, Fax: +1 905 337 8827 Metso Minerals (Brasil) Ltda., Av. Independéncia, 2.500 Éden, 18087-050 Sorocaba, SP, Brazil Phone: +55 15 219 1300, Fax: +55 15 219 1699 Metso Minerals (Chile) SA, Avda Vitacura 4380, 5th oor, Vitacura, Santiago, Chile Phone: +56 2 3702000, Fax: +56 2 3702039 Metso Minerals (UK) Ltd, 2 Lindenwood, Crockord Lane, Chineham Business Park, Basingstoke, Hampshire RG24 8QY, UK Phone: +44 (0) 1256 37620, Fax +44 (0) 1256 376221 Metso Minerals (Johannesburg) (Pty) Ltd, Private Bag X2006, Isando, Johannesburg, 1600, South Arica, Phone: +27 11 397 5090, Fax: +27 11 397 5826 Metso Minerals (Asia-Pacic), Level 2, 1110 Hay Street, West Perth, WA 6005, Australia Phone: +61 8 9420 5555, Fax: +61 8 9320 2500 Metso Minerals (Sala) AB, Norrängsgatan 2, SE-733 38 Sala, Sweden Phone: +46 224 374 00, Fax: +46 224 169 69
www.metso.com E-mail:
[email protected]
Mets Crprtn, Fabianinkatu 9 A, P.O. Box 1220, FI-00101 Helsinki, Finland, tel. +358 20 484 100, ax +358 20 484 101, www.metso.com Subject to alteration without prior notice
Brochure No. 1534-06-09-MBL/Danville-English
© 2009 Metso
Printed in Sweden
