HCGT – Hybrid Coal Gas Turbine

The Hybrid Coal Gas Turbine (HCGT) is a waste to energy platform that uses coarse discard, waste coal fines or a combination of alternative waste combustibles to generate electrical energy. The HCGT is a modular 1MWe, 3MWe or 6MWe power plant that can be configured to meet almost any application requirement.

One of the key attributes of the HCGT technology is its sophisticated process control philosophy for the optimisation of all combustion parameters, this regulates the flow of different waste fuel types into a rotary kiln/s that provide the required residence time at controlled elevated temperatures to ensure total combustion of all waste fuel sources.

The HCGT is a highly efficiency power generation plant that can operates on the combustion of low CV solid waste fuels in a Rotary Kiln/s. Heat energy produced by combustion is recovered by a waste heat boiler, which in turn generates steam to drive an extraction-condensing steam turbine generator to efficiently produce low cost electrical energy.

A multi-stage condensing steam turbine is used to maximise mechanical energy output from steam provided by the HRSG unit. The turbine will consume steam at rated conditions. Steam from the turbine will then be exhausted into a condenser for cooling.

The HCGT enables efficient generation of on site electric power using low cost fuel sources such as coarse discard, waste coal fines and or a combination of other waste combustibles. The intellectual property contained within the HCGT design is predominantly around the combustion process, where the combustion gases are manipulated in a way that ensures continuous combustion, whereas other systems would lose their capability of burning these low-grade fuels. The cooling system design will be project specific and tailored to meet the quality and availability of on site water. Spent low-pressure steam from the turbine will be condensed back to water by a semi-close cooling system. The water is then pumped up to high pressure and recirculated back to the boiler to produce more steam (Rankin Cycle).

The fuel handling and fuel preparation system is a critical component.  A fuel delivery system will be specifically designed to efficiently transport fuel materials to the HCGT for combustion. This detailed design requirement is site specific and will be carried out during the engineering phase of any project.
Waste coal piles leach iron, manganese and aluminum pollution into waterways and cause acid mine drainage that kills neighboring streams and waterways. Waste coal piles may catch fire, releasing toxic pollution into the air, whereas the HCGT can mitigate these waste issues by converting them into a usable low cost energy supply, reducing waste management costs and liabilities while promoting environmental sustainability.
The HCGT has a purpose built design interface with all other EESTech products.