TRT (Top Pressure Recovery Turbine) is an energy recovery device that utilizes the residual pressure of blast furnace gas to generate electricity.
The TRT system draws high-pressure gas released from the blast furnace into a turbine, where it expands to do work,
driving a generator while simultaneously reducing the gas pressure for downstream dust collection or purification systems.
Definition: The Blast Furnace Top Gas Recovery Turbine Unit (TRT) is a secondary energy recovery system that captures the pressure and
thermal energy of blast furnace top gas—a byproduct of the smelting process. It uses a turbo expander to convert this energy into mechanical power,
which drives a generator or other equipment to produce electricity.Working Principle: The gas generated by the blast furnace passes through a gravity dust collector (or, in some designs, an annular gap) before entering the TRT system.
The gas flows through a speed control valve (parallel to the inlet motorized butterfly valve), inlet gate valve,gas flow meter, and quick-cut valve.
It then expands in the turbine to perform work and drive the generator. The gas exiting the turbine enters a low-pressure pipeline, parallel to the pressure-reducing valve group in the gas system.
Main Advantages of TRT:
Energy Recovery: Converts the pressure energy of blast furnace gas into electrical energy, reducing energy waste and improving overall plant efficiency.
Environmental Benefits: By recovering energy, it lowers carbon emissions, contributing to greener production practices in steelmaking.
Reduced Operating Costs: Decreases reliance on external power sources, leading to lower energy costs for the plant.
Extended Equipment Lifespan: Controls gas flow and pressure, reducing the impact on downstream equipment and minimizing wear and maintenance requirements.
Applications: TRT is primarily used in the steel industry and is suitable for large blast furnace systems.It not only enhances energy efficiency in steel mills but also reduces carbon emissions, aligning with the environmental and energy-saving needs of modern industry.
Tags: Turbo Expander