Back Pressure Type Steam Turbine
The backpressure steam turbine unit is a thermal power device operating on the principle of "power generation determined by heat supply". Its core feature is that after the steam does work in the unit to generate electricity, all the exhaust steam (instead of being condensed) is directly output as heating steam. Without a condenser unit, it achieves full energy utilization of the combined "power generation + heat supply" mode.
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Working Principle
The Logic of Full Energy Utilization via "Power Generation by Work Done + Heat Supply by Exhaust Steam"The essence of a backpressure steam turbine unit is to convert the high-grade thermal energy of steam into mechanical energy (for power generation), and then fully utilize the low-grade thermal energy of the exhausted steam (after work done) for heating purposes, achieving zero energy waste. -
Structural Features
Streamlined Design for Integrated "Power Generation + Heating"Without a condenser, the backpressure steam turbine unit has a more streamlined structure compared with extraction-condensing and condensing turbine units. Its design centers on high-efficiency steam work and precise exhaust steam parameter control, and the whole unit is divided into three core modules: rotating parts, stationary parts and auxiliary systems. -
Production Capacity
Output power range: 5KW–30MW
Output speed range: 1000–12000RPM
Inlet steam pressure range: 0.3MPa–9.8MPa
Condensing steam turbine unit
The condensing steam turbine unit is a core power device in the field of electricity generation. Its key feature lies in converting almost all the thermal energy of steam into electrical energy without an intermediate steam extraction process. The exhausted steam after work is condensed and recovered through a condenser, thereby maximizing power generation efficiency.
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Working Principle
Energy Conversion Logic of "Full Steam Work + Condensation Recovery"
The essence of a condensing steam turbine unit is to achieve efficient conversion of "thermal energy → mechanical energy → electrical energy" through the expansion work and cyclic recovery of steam. The entire process revolves around the steam-water cycle. -
Structural Features
Core Design for "High-Efficiency Power Generation + Full-Cycle Operation"
The structure of a condensing steam turbine unit is designed around maximizing steam work efficiency and stable cyclic recovery. It is composed of three core modules: rotating parts, stationary parts, and auxiliary systems. -
Production Capacity
Output power range: 50KW–30MW
Output speed range: 1500–7500RPM
Inlet steam pressure range: 0.15MPa–9.8MPa
Extraction-condensing steam turbine unit
An extraction steam turbine is a type of turbine that extracts a portion of steam from its intermediate stages to supply users. In other words, it generates electricity while also providing heat supply.
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Working Principle
Energy Conversion Logic of "Power Generation Priority, Steam Extraction Supplementary"
The essence of an extraction-condensing steam turbine unit is to convert the thermal energy of steam into mechanical energy, which is then further converted into electrical energy by a generator. Meanwhile, it achieves cascade energy utilization through controllable steam extraction. -
Structural Features
Core Design for Dual Functions of "Power Generation + Steam Extraction"
Based on the structure of a conventional condensing steam turbine unit, the extraction-condensing type is equipped with additional components related to steam extraction. Its overall structure consists of three core modules: rotating parts, stationary parts and auxiliary systems. -
Production Capacity
Output power range: 300KW–30MW
Output speed range: 3000–6500RPM
Inlet steam pressure range: 0.5MPa–9.8MPa
Extraction-backpressure steam turbine unit
The extraction-backpressure steam turbine unit is a composite cogeneration device that combines the advantages of the extraction-condensing unit’s "intermediate steam extraction" and the backpressure unit’s "exhaust steam heating". Its core feature is: "extract part of the steam from the intermediate stage to meet high-parameter heating demands, and use the remaining steam (after doing work) in the form of backpressure exhaust to meet low-parameter heating demands". This achieves "one boiler for multiple supplies and cascade energy utilization", making it perfectly suitable for industrial or civilian scenarios where "multiple-parameter heat loads coexist".
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Working Principle
Energy Cascade Utilization Logic of "Staged Extraction + Backpressure Exhaust"
The essence of an extraction-backpressure steam turbine unit is to convert the high-grade, medium-grade, and low-grade thermal energy of steam into electrical energy and thermal energy of different levels respectively through the combination of high-parameter steam extraction + low-parameter backpressure exhaust. Without a condenser unit, it achieves zero energy waste. -
Structural Features
Composite Design for Dual Heating Functions of "Steam Extraction + Backpressure Exhaust"
Based on the structure of a backpressure steam turbine unit, the extraction-backpressure type is equipped with an additional steam extraction module while retaining the backpressure exhaust function. Its overall structure is divided into three core modules: rotating parts, stationary parts, and auxiliary systems. The core design features focus on staged parameter control, sealing and leakage prevention, and load balancing. -
Production Capacity
Output power range: 300KW–30MW
Output speed range: 3000–6500RPM
Inlet steam pressure range: 0.5MPa–9.8MPa
