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CASE STUDY |
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Waste heat source |
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Engine generator exhaust |
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Capacity of Engines |
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3.8 MW x 1 No. |
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Fuel fired in Engines |
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Furnace Oil (Heavy Oil) |
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Total flue gas quantity |
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32180 kg/hr. |
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Flue gas inlet temperature |
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327 Deg.C |
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System Configuration |
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Main WHRB |
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Flue gas outlet temperature |
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205 Deg.C |
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Output type |
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Steam at 10 bar(g) |
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Output at 100% load |
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1500 Kg/hr (F&A 100 Deg.C) |
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Product Details |
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Type |
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Water tube cross flow IBR |
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Installation |
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Vertical, Indoor and Outdoor |
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Tube Orientation |
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Vertical |
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Waste gas flow direction |
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Horizontal |
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Quality of Waste gases |
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Moderately clean gas desired. Provided with mechanized soot
removal and collection system. |
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Acceptable dust in waste gases |
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Moderate dust level accepted. |
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Type of heat recovery output |
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1)
Steam - D & S / Super-heater
2) Hot Water,
3) Vapour phase thermic fluid |
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Media of waste heat |
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Hot gases |
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Steam pressure |
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Suitable for low as well as high pressure |
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Steam condition |
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Dry & saturated and also superheated steam through provision
of super-heater. |
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Water side circulation |
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Natural circulation |
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Steam separation |
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In
steam drum or in external moisture separator |
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Waste heat source suitability |
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Exhaust of steel furnaces, cement kilns, metal smelters,
incinerators, industrial furnaces, DG set exhaust process
waste gases, Incinerator exhaust, Furnace exhaust, Gas
turbine exhaust. (Gases with temperature less than 550 Deg.C) |
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Typical applications |
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Process heating, hot water generation, thermic fluid
heating, power generation, cogeneration. |
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Duct firing possibilities |
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Possible for applications on gas turbine exhaust, heat
addition into waste gas steam by addition of hot gases
generated by separately fired hot gas generator. |
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Output capacity possibilities |
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No
Limits |
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Soot Removal |
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1)
Mechanized vibrating soot removal
2) Travelling type
steam soot blower.
3) Rotary soot
blower |
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Number of heat recovery stages possible |
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3
to 4 stages of heat recovery possible e.g super-heater,
evaporator, economizer, water preheater. |
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Typical lowest exhaust gas temperature at final outlet of
system |
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Gases generated by diesel - 130 Deg.C, Gas generated by
Natural Gas - 110 Deg.C, Gases generated by high sulphur
fuels - 150 Deg.C |
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Protection against sulphur corrosion on cold end side |
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Provided by various means to ensure that metal temperature
is maintained above actual incipient limit. |
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Flow Diagram
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