CYLINDER HEAT TREATMENT FURNACES
Wesman has a full range of Cylinders Heat Treatment Furnaces up to a capacity of 60 cylinders per hour or 10 MTPH to offer to Cylinders Manufacturing industries. Heat Treatment line comprises Hardening and Tempering Furnaces with Quenching Facilities. The hardening furnaces can be walking beam type with quenching system for polymer or oil as per process requirement and tempering furnaces can be walking beam or conveyor type.
Cylinders can be manually placed on a charging conveyor in front of walking beam hardening furnace. Walking beams of hardening furnace will pick-up the cylinders from the conveyor and will move inside the hardening furnace at required spacing from charging to discharging end. The heated cylinders will be discharged out of the hardening furnace one by one and will be placed over the cradle of the hydraulically operated vertical or rotary type quenching system which will immerse the cylinders into the quenching oil. After the quenching cycle is over, the cradle will lift-up from the quenching tank and the cylinders will be moved forward to charge side of the tempering furnace by means of electro-mechanical discharge conveyor.
Cylinders one by one will again will be charged on the hearth of walking beam/conveyor type tempering furnace at required spacing and will be moved from charging end to the discharging end by means of hydraulically operated walking beams or electro-mechanically operated conveyor system. After the tempering process, cylinders one by one will be discharged at the opposite end of the tempering furnace and will move to unloading area where the cylinders can be unloaded by means of hoist or manually.
The furnaces are fired with Wesman’s high efficiency burners supported by a full complement of combustion system consisting of combustion fan, atomizing fan, oil heating and pumping systems and/or gas trains. In addition auto ignition, flame failure safety and complete control systems are offered. Practically any type of liquid or gaseous fuel can be used viz. Furnace Oil, Light Diesel Oil, LPG and Natural Gas singly or a combination of any oil or gas in case of dual fired furnaces.
The Hardening Furnace is provided with Recuperator to improve fuel efficiency, the Recuperator will heat the combustion air up to 200 deg C and the pre-heated air will be supplied to the burners.
The Tempering Furnaces can be directly heated through Burners located behind stainless steel baffles. To allow uniform heating inside the tempering furnace and ensure sufficient circulation of hot air, suitably sized recirculation fan assembly will be provided. Baffles fabricated from stainless steel sheets of AISI-304 are installed to guide the recirculation of hot gas inside the furnace. These baffles are suitably anchored with heat resistant studs from sidewalls and roof.
The Hardening Furnaces are lined with high temperature grade ceramic fiber lining at the sidewalls and modules at the roof and door. The bottom hearth of the furnace is provided with combination of high alumina bricks backed by insulation bricks to minimize the skin temperature.
The Tempering furnaces can be of Double Wall construction with inner SS 304 and outer MS or with Cera board with back up ceramic fiber lining at the sidewalls roof and door. The bottom hearth of the furnace will be provided with combination of medium grade alumna bricks backed by insulation bricks to minimize the skin temperature.
Wesman has full capability to offer complete control and instrumentation system to suit each customer’s requirement – from simple to very advanced and sophisticated controls. Temperature control loops, furnace pressure control loops, fuel ratio control loops, instrumentation for over temperature and recuperator safety by stand alone instruments or PLC based SCADA software control systems are offered. Automatic sequential control PLC software is standard with all furnaces.
Additional accessories like Roller tables, Chain Conveyors at charge and discharge side, Closed Circuit TV Cameras for viewing charge and discharge operations from the control room, are offered to suit each user’s need.
Wesman uses a customized computer software for all the design aspects of each installation starting from heat balance, zone temperature set points, fuel consumption calculations at different outputs and different charge sizes so that the fuel consumption is optimized and the temperature difference between surface and core is the minimum.