High Velocity Burner (HV)
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.
Benefits:
- Rapid and uniform heat distribution
- Robust burner with high turndown and excess air capability
- Controlled firing pattern through choice of outlet
- Fuel savings with hot air version
Minijet Burner (MJ)
The Minijet Burner has been developed to provide a cost-effective solution on applications where space is limited and thermal ratings are relatively low. Typical applications are tundish preheating station where several small burners are required to direct heat towards critical areas such as the pouring nozzles and impact pads or continuous kilns where firing patterns and zone configuration usually require a large number of small burners. Other applications include small ladle heaters or small reheating, forging and heat treatment furnaces where high velocity cannot be used. The Minijet is also used in low temperature applications such as process drying or heating as well as ovens where they can be used in conjunction with recirculating fans.
Benefits:
- General purpose, robust, low-cost burner
- High turndown and excess air capability
- Choice of outlet velocity & material to suit application
Flat Flame Burner (FFB)
The Flat Flame Burner has a flared refractory outlet which produces a disc-shaped flame which “sticks” to the refractory wall or roof, thus creating a source of radiant heat. It is used in applications where no forward velocity can be tolerated.
Typically these are kilns where the flame cannot be allowed to impinge on the ware, or large reheating furnaces, where they are installed in the roof to ensure good temperature uniformity by providing additional heat in the middle of the furnace. FFB Burners are also used for reheating glass sheets prior to bending.
Benefits:
- Uniform heat radiation over a wide area
- No hot spot in front of the burner outlet
- Robust burner
- Fuel savings with hot air version
Hotwork Recuperative Burner (HRB)
In a furnace without heat recovery equipment operating on natural gas at 1200oC with 10% excess air, 63% of the energy input is lost in waste gases and not actually available to the process.
With typical air preheats in excess of 1/3 of the furnace operating temperature, the Hotwork Recuperative Burner has the ability to recover part of this energy by exhausting hot waste gases through its specially designed quarl and over an integral metallic heat exchanger which, in turn, preheats incoming combustion air.
This heat recovery significantly reduces the amount of fuel required for the process and makes the HRB Burner ideal for applications where flue gas temperatures are high and load residence time at high temperature is long, such as forging and heat-treatment furnaces or batch-type furnaces.
Benefits:
- Up to 50% fuel savings
- Associated reductions in CO2 emission
- Robust burner providing excellent heat transfer to the furnace load
- No conventional flue needed, reducing furnace installation costs
- Lower waste gas temperatures
Low NOx Regenerative Ceramic Burner (RCB)
The Regenerative Ceramic Burner system was first developed into a commercial product in 1982 by Hotwork Development Ltd based from an original concept from British Gas Midland Research Station. This led eventually to the Queen’s Award for Technological Achievement in 1992. Thousands of Hotwork RCB systems have been used in a wide variety of applications (reference list available on request) such as steel reheating, forging, heat-treatment and aluminium melting, which positions Hotwork Combustion Technology Ltd. today as the most experienced designer of regenerative burner systems.
Benefits:
- Outstanding fuel savings of up to 65%
- Significant reductions in CO2 emission (directly proportional to fuel savings)
- Reduced levels of NOx
- Rapid and uniform heat distribution
- Robust burner with high turndown and excess air capability
- Improved productivity
- No need for refractory-lined flues or recuperator due to low exhaust temperatures
- Reduced exhaust filtering requirements
- Highly fuel efficient, compact system
- Better resistance to heat and corrosion than metallic recuperators
- Attractive payback period
Self-Recuperative Radiant Tube (RT)
The Hotwork Combustion Technology single-ended radiant tube incorporates a self-recuperative burner which has been designed for delayed mixing and progressive combustion to produce a highly radiant diffusion flame. This ensures uniform and high heat transfer to the outer surface of the tube and as a consequence even temperature distribution inside the furnace. The products of combustion exhaust through the integral heat exchanger which in turn preheats incoming combustion air, thus achieving high fuel efficiencies of up to 70%. The process of heat recovery reduces the amount of fuel required by as much as 35%.
Self-recuperative Radiant Tubes are ideal for converting electrically heated furnaces to gas firing as they are more robust than electric elements, cheaper to operate and can be replaced individually with little or no loss of production. They also provide a cost-effective solution to open-ended cold air radiant tubes since the heat is distributed more evenly inside the tube, resulting in prolonged tube life, improved temperature uniformity inside the furnace and better fuel efficiency.
Benefits:
- High fuel savings
- Uniform heat distribution over the length of the tube
- Easy installation
- Prolonged tube life
Aluminum Turnkey Projects
The High Velocity (HV) Burners are manufactured
locally under license to Hotwork CT.