Self-Recuperative ecoNext
Self-Recuperative Burner
High performance heat exchange unit with the burner that has combustion exhaust gas in the furnace installed, it brings out energy saving efficiency by collecting the waste heat and preheat the combustion air.
■Comparing the energy efficiency with existing burner
| efficiency | Conventional burner | ENX burner | ||
|---|---|---|---|---|
| Fuel spending | 100% | 70% | ||
| Calorie spending | (A) | Product processing calorie | 25% | 25% |
| (B) | Furnace calorie diffusion (to atmosphere) |
40% | 40% | |
| Heat radiation | ||||
| (C) | Exhaust calorie | 35% | 5% | |
The conventional burner diffuses the 1,000℃ waste heat as it is. ENX burner (Eco-burner) on the other hand collects the waste heat by circulating the combusted exhaust gas in the furnace and supplies it to the burner. In order to increase the heat temperature, it saves the amount of fuel spending and as the result reduces the temperature of exhaust heat.
Over 400 small tubes enabled the super efficient exhaust collection.
In addition to low temperature type heat exchange unit(600℃), we have prepared special surface coated high temperature type(1,050℃) as well.
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Reducing the amount of fuel consumption drastically reduces the amount of CO2 emission.
It also has an effect of lowering the exhaust temperature that improves the work site environment.
| Conventional burner | Eco-burner | |
|---|---|---|
| Energy consumption at furnace:[NM3/day] | 132 | 84 |
| CO2 emission/year | 92.3 | 58.7 |
- Fuel reduction rate: 36%
- Comparison data: 1,000kg aluminum holding furnace
- Annual operation hours: 7,200 hours(300 days) 24 hours/day
- CO2 emission factor: 0.00233t-CO2/NM3
- Conventional burner: No exhaust collecting ability
Eco-burner: 900℃ inside furnace, 730℃prehea - Gas type: 13A(calorie 11,000kcal/Nm3)
- Temperature inside furnace(exhaust gas temperature):1,000℃
- Preheat air temperature:800℃
- [in case of town gas 13A]
| System | Heat exchanging unit (recuperator) |
Regenerative system |
|---|---|---|
| Heat exchange unit | Countercurrent heat exchange | Batch switching regenerative |
| Material for heat exchange unit | SUS + surface treated | Ceramic ball and others |
| Operational system | Continuous run | Batch switching |
| Size | ◎small size for main unit and system | △large |
| Initial cost | ◎ | △ |
| Temperature efficiency | ○ |
○ |
| Energy saving efficiency | ○ |
○ |
| Maintenance cost | ◎ | × |
| Type | ENX-60 | ENX-120 | ENX-240 |
|---|---|---|---|
| MAX output | 60kW (50,000kcal/hr) |
120kW (100,000kcal/hr) |
240kW (200,000kcal/hr) |
| Fuel | Town gas(13A), LPG | ||
| Gas pressure | Nozzle pressure:1.0kPa, Supplying pressure: 10kPa | ||
| Air pressure | Nozzle pressure:1.0kPa, Supplying pressure: 10kPa | ||
| Igniting system | Direct ignition | ||
| Flame detection method |
Ultra violet phototube system(ultra vision) | ||
| Heat resistance temperature at main unit | Select from two types below High temperature type: heat resisting: 1,050℃ Low temperature type: heat resisting: 600℃ |
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When putting solid metal into the furnace with fused metal inside, the temperature of the furnace gets reduced and needs to be heated again.
This furnace saves energy cost by increasing the temperature of preheat air for the burner with the exhaust heat and lower the calorie for heating.
| Equipment | Crucible type fusion furnace |
|---|---|
| External size | φ1,980xH1,550 (furnace) φ1,050xH600 (crucible diameter) |
| Controlled temperature | 480℃ |
| Heat source | 13A |
| Burner | ENX-240(240kW) |
| Material | External: Painted steel plate |
| Others | 2,000kg/hr |
Transport system that puts parts in and out furnace is using the truck of self-propelled type.
And we can achieve large fuel saving by using ECO burner.
▲Dolly type annealing furnace
▲ECONEXT
| Equipment | Dolly type annealing furnace(10t type) |
|---|---|
| Transport type | Self truck |
| External size | W3,500xH3,000xD6,000 |
| Processing capacity | 10t／charge (15t／charge ：including dolly) |
| Temperature | MAX1,000℃ |
| Heat source | LNG |
| Burner type | ENX-120 120kW type×10 unit |