WASTE TO ENERGY SOLUTIONS

Transcription

1 WASTE TO ENERGY SOLUTIONS

2 Small Waste to Energy CHP Plant The current trend is for smaller localised Waste to Energy plants that combust a range of waste materials with associated costs for disposal such as RDF, or waste that is on-siteand freely available as a fuel such as chicken litter, digestate or woodfines. Typically, RDF is an example of a waste that incurs a cost for transport and disposal that can be converted from a cost to a financial benefit. Inciner8 s integrated Waste to Energy Plant design can combust up to 1000kg/hr (8000t/yr) saving a staggering 700,000+ per year in disposal costs amd electrical consumption. There is typically 4000kW of heat in the RDF that can be converted to electrical generation and/or process hot water.

3 So, whats involved in the w2e process? Waste Streams - RDF/SRF, Chicken Litter, Digestates, Food, Grade C/D Wood, Wood Fines Prepare Waste - Sorting, Shredder, Chipper, Screening Remove Moisture - Drying, Digesting or Feed as is Energy - Combustion gas is converted to Electricity and/or Hot Water } SAVE COSTS ON Disposal, Transport & Time WASTE TO ENERGY Create Hot Water, Electricity INCOME FROM RHI, Electricity to Grid

4 Ideal Fuel Types for Waste to Energy Plants Calorific value and moisture content are the main factors when assessing your waste streams for viability as fuel in a waste to energy solution. Moisture can be addressed easily as part of the process, calorific value is embedded in the waste mix itself. You can add other waste types (e.g. woods/plastics) to improve calorific values if needed. Our Small Scale Waste to Energy Plant that can combust: Poultry Litter Grade C/D Wood RDF/SRF Woodfines Digestates International Catering Waste Food Waste Plant Husks Do the maths! These calculations are based on 1000kg of RDF waste with a moisture content of 30%.

5 What Makes up a Waste to Energy Plant? Waste to energy plants require a number of specialist components to operate. The combustor is the heart of the system where the waste (fuel) is gasified and converted to raw energy in the form of heat.

6 Toploader Feed System It is recommended that the RDF fuel be delivered by a toploader system. This ensures the waste/fuel is mixed from the bottom to the top. This creates a homogenous mixture of fuel and air. This also airates the pile for additional drying. Feed rate of 1000kg/ hr. Density of 100kg/ m3 which can vary depending on moisture content. Toploader delivers waste to conveyor/ autoloader or directly into the combustor

7 The Waste Combustor Waste is automatically fed onto a moving grate, this hydraulically driven moving grate moves the fuel through the furnace, where it is subsequntly dried, gasified and completely combusted. The temperature in the furnace is controlled between 925 C and > 1000 C by recirculation of flue gas from downstream of the filter. The temperature controlled by flue gas recirculation also increases the efficiency of the process since the required amount of surplus air is decreased. An auxillary burner is on standby should the temperature drop below 850 Cas required for compliance to IED regulations. Low NOx emissions and complete combustion are reached by specially designed staged combustion. Ash falls from the end of the moving grtae into an ash conveyor. Fine ash that falls through the grate is also caught in the ash conveyor and is automatically transported to the ash container. The combustion system delivers a high-volume capacity of up to 1000kg/hr (approximately 4MW of heat)

8 PCS (Pollution Control Systems) The pollution control system takes the environmental performance to another level, in many cases this is overkill. The purpose of the system is to allow compliance with EU regulations for hazardous waste. The pollution control system complies with the best practice advice set out in Directive 2000/76/EC on the incineration of hazardous waste. The controlled substances can be grouped according to their current best practice abatement/ control technology: Particulates removed by filtration VOCs and CO removed by combustion in a secondary combustion chamber (the EC directive specifies that a secondary combustion chamber must be used) Acid gases; SO2, HCL and HF removed by reaction with a reagent NOx controlled by good burner and combustion technology, removed by SCR or SNCR if required which involves reaction with ammonia Mercury, Hg should be removed before waste fed into incinerator, otherwise gas must be cooled to low temperature and passed through activated carbon Heavy metals 1, Pb, As, Sb etc. removed as solids by filter. Heavy metals 2, Cd, Tl should not be any but will be filtered out if present Ammonia this is not controlled in EC, as far as we know, but will not be present unless it is added for NOx control as above Dioxins & furans will be destroyed in afterburner. De novo formation either avoided by high temperature filtration or removed by passing through activated carbon (or oxidation catalyst).

9 ORC Engine EBox 170kWe Genertator RDF combustion gas at +/-1000 degc is cooled to 460 degc before delivery to the PCS system (Pollution Control System) where the gas is filtered in compliance with IED regulations. The clean filtered gas exits the PCS at 420 degc and delivered to the ORC Evaporator where the heat is exchanged converting a liquid (working fluid) to a high-pressure vapour, this high pressure vapor expands driving the ORC Turbine producing electrical generation. Based on combustion of 1000kg/hr RDF, there is sufficient heat to run 1 x Ebox ORC Generator at full load producing 170kWe gross (net 155kWe) to off-set electrical site loads or to export to the National Grid. There is 700kWth in the condensing water that can be used as process heat, the graph shows condensing water temperatures and electrical generation outputs.

10 Hydraulic Auto Loader Heat Exchanger The heat exchanger is where the energy generated heat is distributed to other systems at the optimal temperatures and speed. This ensure that there is a steady flow of hot water or energy to poewr an ORC engine and generated electricity. The autoloader is designed on a fully hydraulic operation system powered with a touch screen control panel. The loading door is operated by a single RAM (60x30x700). The loading chute operates with twin RAMs - the first actuates the loading chute and the second actuates the scraper ram to ensure no waste is left in the chute. Opening the i combustor s door is actuated with twin hydraulic rams operating simultaneously. The waste (fuel) is then distributed evenly across the chamber floor for even combustion. The loading cycle time is just 20 seconds

11 Appendices Triogen EBox configuration example Heat Exchanger The heat exchanger is where the energy generated heat is distributed to other systems at the optimal temperatures and speed. This ensure that there is a steady flow of hot water or energy to poewr an ORC engine and generated electricity. Overview of i combustor and dimensions All diimensions here are for illustrative purposes.

12 Appendices Combustor CHP flow chart

13 Appendices Our Partners FACILITATORS AND PROJECT MANAGEMENT Environ servcices includes: Engineering, Specialist Welding, Procurement and Commisioning, Complete System Design, CAD & Solidworks,Fabrication, Build and Maintenance for the following applications: Combustors for combustion of wood, RDF, Poultry Litter and other organic materials Biogas CHP ORC and Steam Combined Heat and Power Leachate Evaporators Landfill Gas Pipe Work and Gas Cleaning Systems Biogas and Landgill Gas Engines POWER FROM HEAT Triogen is a leading ORC manufacturer and supplier whose ORC technology converts heat from your business process into. When applied to landfill sites, digesters, diesel engines, wood burners, furnaces, etc. the Triogen ORC produces valuable green electricity. Our mission is: We are passionate to develop and deploy innovative waste-heat recovery technology to address the energy and environmental challenges of our planet and to serve our customers; we enjoy turning ORC technology into a large commercial success. Triogen s vision: By 2035, Triogen will take ORC technology to the level of success that turbo chargers showed over the last 40 years: become a standard feature of combustion engines, significantly reducing fuel consumption and emissions. We make this happen by offering great value to our customers today via add-on solutions to engines and other heat sources, as well as developing engine-integrated solutions.

14 Sales / Head Office Inciner8 International 2 Canning Rd Industrial Estate Southport Merseyside PR9 7SN T: +44 (0) E: enquiries@inciner8.com Dealerships If you would like to become part of our dealership network, please get in touch with Duncan Sandford: T: +44 (0) E: dealers@inciner8.com Technical Support T: +44 (0) E: techsupport@inciner8.com