| Benefits
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Initially developed by Hotwork Development Ltd in 1962 to dry and preheat the refractory linings of glass melting furnaces, the High Velocity Burner has been well proven in the most arduous of conditions such as forging, aluminium melting, kilns, incineration and generally large applications which are suitable for its long flame path.
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| High velocity |
The HV burner is a robust and extremly stable burner with high excess air capability which can deliver combustion gas velocities in excess of 150 m/s. This results in rapid and uniform heat circulation inside a furnace as well as improved and controlled heat transfer to the load.
These features make the HV Burner ideal for applications such as heat-treatment, where the load has to be heated in a controlled manner to comply with stringent quality assurance standards like Rolls Royce RPS953
Other applications include ladle and tundish heating where the refractory linings have to be dried slowly with high levels of excess air and preheated quickly on stoichiometric ratio. |
High turn down and excess air facility
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The maximum turndown of 10/1 of the standard HV Burner can be further improved by using a high turndown inlet which will enable the burner to achieve 50/1 on fuel only control with up to 5000% excess air. |
| Outlet choice |
The standard High Velocity Burner is fitted with a converging refractory quarl for furnace temperatures up to 1600 ° C. Short quarls are available for vertical firing.
Double-skinned air cooled metallic outlets for temperatures up to 1050 ° C are also available to direct heat towards specific areas i.e. sideways in a tundish through a T-cone, or tangentially to the walls and load of a heat-treatment furnace through a cranked cone. A parallel quarl outlet can also be provided where the maximum velocity is not required. |
| Fuels |
The HV Burner is suitable to fire on natural gas, LPG and coke oven gas. It can also be used with gas oil with a viscosity of 34 sec. Red. 1 or with a dual fuel arrangement. |
| Ignition and flame supervision |
The HV Burner is ignited by means of direct spark when operating on gas, LPG and COG and by premix pilot when operating on oil. The burner is fitted with a sight glass and a port is provided for a UV scanner to be installed. In order to start the burner automatically and supervise the flame permanently, Hotwork Combustion Technology can also supply flame management equipment if required |
| Hot air version |
In order to improve fuel efficiency, a Hot Air High Velocity Burner accepting preheated air up to 600 ° C is also available. For a specific thermal rating, the hot air version is slightly larger than the cold air burner to cope with the effect of preheated air.
Hot Air HV Burners are ideal on applications fitted with a central recuperator such as forging and reheating furnaces. They can also be used in conjunction with individual recuperators such as the Hotwork Compact Recuperator (HCR) where typical fuel savings of 40% can be achieved at a furnace temperature of 1400 ° C.
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