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Coal SYN Gas For Thermal Powerplants
 

Coal SYN Gas For Thermal Powerplants

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COAL SYN-GAS :

COAL SYN-GAS :
The most Viable & Economic alternative for retrofitting Small/Medium
Oil-Fired Thermal Power Plants

www.rade.co.in

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    Coal SYN Gas For Thermal Powerplants Coal SYN Gas For Thermal Powerplants Presentation Transcript

    • COAL SYN-GAS : The most Viable & Economic alternative for retrofitting Small/Medium Oil-Fired Thermal Power Plants © R.A.D.E INITIATIVE 2013 | rade.initiative@gmail.com
    • • Use Heavy Fuel Oil(HFO) or Residual Fuel Oil (RFO).• Some small units are powered by a direct fired combustion Turbine.• Most have a Steam Boiler and Steam Turbine to run the Generator.• Are becoming economically non-viable due to high Fuel prices.• The price of RFO is not likely to come down to economical levels.• Are being either shut down or converted to other Fuels.• Shutting down these plants has increased electricity shortage. © R.A.D.E INITIATIVE 2013 | rade.initiative@gmail.com
    • Retrofitting of Oil-fired Power-plants• Many Oil-fired Power plants are being converted to other fuels.• Conversions usually involves costly up-gradations of the plants.• Plants are converted to run on Coal, Natural Gas or SYN Gas.• Most of the changes are made in the Boiler firing Section.• Also requires a new Fuel storage & handling section.• Apart from the conversion expenses, the new fuels bring along their own associated problems.• Converted Plants usually run on lower efficiencies than the originally designed. © R.A.D.E INITIATIVE 2013 | rade.initiative@gmail.com
    • • Oil-fired Power plants are mostly converted to Coal firing.• Conversion involves extensive changes to Boilers.• Needs the addition of a Coal Pulverizer unit and Blower Section.• Requires the creation of a large Coal Stockyard.• Up-gradation of the Boiler Bottom Ash cleaning section.• Coal transportation causes extensive Dust pollution.• Coal Stocking has the scope of causing high groundwater pollution through leaching in high rainfall areas.• Needs the erection or up-gradation of an ESP (Electrostatic Precipitator) for capturing fly ash from the Flue Gasses.• Needs Wet-scrubbers to curtail Sulfur Oxide atmospheric pollution. © R.A.D.E INITIATIVE 2013 | rade.initiative@gmail.com
    • • Some Oil-fired Power plants are also converted to Natural Gas.• Subjected to availability and regular supply of Natural Gas.• Plant conversions usually involves only changing of Burners & laying Gas pipelines.• Requires the addition of a Buffer tank in case of piped Gas.• Need a large Gas storage tank in case of transported gas.• Plant can be easily combined to IGCC (Integrated Gasifier Combined Cycle) co-generation with the addition of a Gas Turbine.• Economics of the plant depend on the fluctuating International prices of natural gas.• Being Clean-burning, it doesn’t require any special anti pollution equipment. © R.A.D.E INITIATIVE 2013 | rade.initiative@gmail.com
    • • An alternative to natural gas is Coal - SYN Gas ( Synthetic Gas) .• Subjected to availability of any grade of Coal (Anthracite to Lignite).• Conversions involves changing of Burners & laying Gas pipelines.• Gas can be prepared either on-site or transported from other locations.• Involves erecting a large gasifier or a battery of small gasifier units.• Construction of a large gas storage tank in case of transported gas.• Plant can be easily combined to IGCC (Integrated Gasifier Combined Cycle) co-generation with the addition of a Gas Turbine.• Economics of the plant depend on the relatively stable price of coal.• Stack emission levels comparable to Natural Gas. © R.A.D.E INITIATIVE 2013 | rade.initiative@gmail.com
    • • Gasification is a process that convert solid feedstock like coal or biomass into a combustible gas.• Coal is gasified by being reduced under high pressure high temperature with steam in a specialized retort known as a Gasifier.• Coal Gas is also called as Syngas or Synthetic Gas.• Syngas can be burned cleanly with negligible pollution.• Basic Syngas consists of Hydrogen, Carbon-monoxide and Nitrogen with trace element of other gases.• Modern Gasification Systems produce a Syngas at par with natural gas called “Synthetic Natural Gas” or SNG.• There are 178 operating gasification plants worldwide. © R.A.D.E INITIATIVE 2013 | rade.initiative@gmail.com
    • © R.A.D.E INITIATIVE 2013 | rade.initiative@gmail.com
    • • LOW BTU GAS 150-300 BTU/ft3: Basic Syngas produced by air fed Gasifier which contains 35-50% nitrogen, but suffices as normal industrial heating or Boiler fuel.• MEDIUM BTU GAS 300-550 BTU/ft3: Higher grade Syngas produced by Oxygen fed Gasifier which requires a dedicated oxygen Plant. It adds Nitrogen and other gases to the saleable product portfolio.• HIGH BTU SNG 1000-1400 BTU/ft3 : Gas at par or higher than natural gas. Requires gas de-sulphurising unit and a catalytic unit, called a “Shift-reactor” to upgrade the Gas. © R.A.D.E INITIATIVE 2013 | rade.initiative@gmail.com
    • • LOW BTU GAS : Low Investment - consisting of a battery of small/medium sized Gasifiers with gas scrubbing and compressing systems, Gas storage tank, pipelines and burners.• MEDIUM BTU GAS : Medium Investment - comprising of a battery of small/medium sized Gasifiers with gas scrubbing and compressing systems, Main Gas tank, pipelines and burners. An Oxygen producing unit. with appropriate gas compressing systems and storage tank.• HIGH BTU SNG : High Investment - Requires special expensive imported Gasifiers, gas scrubbers, large Oxygen Plant, De-sulphurising unit and a catalytic unit, called a “Shift-reactor” to upgrade the Gas. © R.A.D.E INITIATIVE 2013 | rade.initiative@gmail.com
    • • Virtually any grade of Coal can be converted into Gas.• Coal mine waste products like fines, slurry, etc can also be gasified.• Economics are predictable as Coal Prices are relatively stable.• Coal based Syngas is much less polluting than burning Coal.• Coal Syngas can be manufactured on-site or near the Coal mines.• Coal can be blended with Biomass or Municipal Waste to produce gas.• Transporting compressed SYN-Gas is cleaner than transporting Coal.• Ash left after gasification is a raw material for the cement industry.• No hassle of cleaning and disposing of Fly Ash and Bottom Ash.• The Power plant can be easily upgraded to an IGCC plant.• Economy of burning Coal and the cleanliness of Natural Gas. © R.A.D.E INITIATIVE 2013 | rade.initiative@gmail.com
    • • Coal Syngas is most widely used worldwide to generate electricity.• Worldwide gasification capacity is projected to grow 70 percent by 2015, with 80 percent of the growth occurring in Asia.• Low MW Coal Syngas based power Plants are gaining popularity in many Asia and African countries.• China has 80 Coal-SNG units under planning & construction.• Ukraine in setting up 5 SNG plants at the cost of $35 billion.• In India Coal Gasification has only been adopted by several Industries like Steel, Ceramics etc., for captive Consumption.• GE, Siemens, Lurgi, British Gas Ltd, etc., provide Coal Gasification Technology. © R.A.D.E INITIATIVE 2013 | rade.initiative@gmail.com
    • • Techno-Commercial Feasibility Study.• Preparation of Complete Project Report.• Government Liaison.• Machinery selection.• Vendor selection.• Negotiate with Overseas Technology Providers and Investors.• Complete Technical Assistance for setting up the unit till commissioning.• Assistance in preparing Press rereleases and Publicity material. © R.A.D.E INITIATIVE 2013 | rade.initiative@gmail.com
    • We Specialize in: •Fuel Handling & Planning. •Fuel Emulsification. •Diesel Saving. •Coal & Biomass Gas. •Other Energy Related Services.© R.A.D.E INITIATIVE 2013 | rade.initiative@gmail.com