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The design of the Beam Expanders is based on a Galilean Telescope configuration which is corrected as an afocal system for use over a range of narrow wavebands. The wavefront illustrations give the design performance of these lenses. Apart from expanding a beam, this lens allows the control of laser beam divergence to produce smaller beam diameters at large distances. The adjustable mount and locking ring permit variable setting of the beam diameter over long distances.
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Beam Expanders
Expansion ratio 2.5 X or 5 X
Lenses antireflection coated
Focusing range: 2 m to infinity
High energy laser beam expansion
Two lens system beam expanders 10BE01 are focusable to minimal distance 2 m. In such type beam expander aberrations can be totally compensated only in one point. Depending on customer needs and application we can customize beam expander lenses to compensate aberrations in region of 2 m focus point or for infinity. Beam expanders could be customized for any wavelength from the range of 450-2000 nm
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Expander
Expanders can be supplied as single- and multistage variants, in axial or radial configurations. With maximum inlet temperatures of up to 760 °C, an inlet pressure of 16 bar and outputs of up to 30 MW, they can be connected to a generator or directly to the machinery train.
They are preferably used in:
* Coal and oil gasification plants (including IGCC)
* Nitric acid plants
* Therephthalic acid plants
* Fluid Catalytic Cracking (FCC) plants
* Residual Catalytic Cracking (RCC) plants
* Blast furnace top gas plants.
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Pre-expander for Lost Foam and laboratory applications
Complete unit consisting of:
EPS pre-expander
fluid bed incl. delumper unit
control panel
material blower
Unit is installed on a platform.
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Volume of pre-expansion chamber 600 l
* Output approx. using west european standard raw material quality
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Complete line of batch pre-expanders; they can expand all types of EPS material on the market with total control of the cycle. The range starts at 150-litre volume and goes up to a 4000-litre model.
The two largest size models are designed for companies that produce blocks and/or big quantities of low/medium density EPS.
The intermediate sizes are for companies that produce with any density.
These models may be fitted with an optional patented device which ensures a 50% quality increase in density tolerance of the expanded material.
The smallest model is designed for companies that produce safety items; it is complete with a patented system to obtain EPS with controlled and constant density and pearl size; the tolerance to medium/high density is less than 1 g/l.
Alessio also produces continuous pre-expanders and 2nd expansion systems.
All our pre-expanders are equipped with "automatic density control".
Screw-feeder or aspirator feed systems are available.
The silos' transfer system may be by Venturi tube or sector valve.
The layout of the various elements that make up the system may be customized on request.
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Advantages:
- Little space required
- Short resetting times for material and bulk density changes by recipe administration and selection of the raw granulate source using the display.
- Bulk density accuracy +/- 0.2g/l at a bulk density of 20g/l lead to quicker amortisation.
- Variable speed control of the agitator for different starting materials.
- All-electronic control systems guarantee an optimum degree of foaming.
- Steam extraction in the outlet box permits central extraction of the escaping pentane-steam mixture
- Economical utilisation of the condensate produced for heating the heat exchanger in the fluidised bed dryer
- Operator-oriented display surface with process-oriented menu configuration
. integrated malfunction administration
. recording of production data and recipes
. integrated maintenance schedule
. teleservice-compatible (EM Service)
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Elliott pioneered power recovery expander turbine technology in the 1950's and has been a leader in the field ever since. An Elliott TH power recovery expander turbine converts high temperature, low pressure flue gas energy into usable power. The turbine often is used to drive compressors or generators in refinery fluid catalytic-cracking (FCC) service. Recovery power for these applications can approach 50,000 hp (37,300 kW).
Elliott design engineers continue to advance expander technology to meet the changing demands of the FCC process. By using computational fluid dynamics to verify flow path design and minimize blade erosion, we have significantly extended typical time between turnarounds far beyond the industry average, without sacrificing efficiency. A number of Elliott expanders have exceeded 9 years of rated service without a blade change. To insure reliability, we design all critical components using finite element analysis. And we are continuously developing new coatings and materials to resist the erosive and corrosive environment of the FCC process.
Elliott power recovery expanders are the most dependable and durable designs in the industry.
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... see all the products in the category
Turbines
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