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| Baggeridge Brick Ltd. |
| | | | | | | | | As part of a general modernisation programme, Attic Rose Ltd recently completed commissioning of No.5 in a series of large, solid hearth intermittent kilns for Baggeridge Brick's Sedgley factory.
This kiln is used, in the main, for the firing of a range of traditional blue brick products, so must operate for long periods under reducing atmospheres.
This latest kiln incorporates 28 burners arranged into 14 individual temperature control zones of two burners - one firing from each side of the kiln, with every burner having its own motorised control valve and ratio regulator. By using separate control valves for each burner the gas and air pipework configuration was greatly simplified. |
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In this case we opted to use the Kromschroder's latest IC40 control valve. The IC40 is a fully programmable, 4-20 milliamp positioning servomotor, with customer configurable output linearization. Consequently, it was possible for paired burners in a control zone to be closely matched. Commissioning data is input and saved via a simple 'opto-electric' communications loop.
A Eurotherm 2704 series instrument is used to provide kiln firing profile generation and overtemperature protection, and 'master comms' to the 14 zone temperature controllers. At the end of the heating cycle, control of the kiln is switched to an inverter speed controller on the main combustion air fan.
The system as installed maintains excellent control of both temperature and gas/air ratio throughout the heating cycle, whether firing on-ratio, or in reduction mode. |
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| | | | | | | The benefits to our customer: -
- Improved temperature uniformity
- Increased product yield
- Lower fuel consumption
- Ease of operation
- Reduced maintenance
All the equipment used was standard, off-the-shelf and much of the cost of the additional hardware was offset by the reduction in pipework materials and installation, and by reduced on-site commissioning time.
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