Xinran screw expander is a positive displacement expander. Commonly known as the screw expansion machine refers to the twin screw expansion machine, the nature of the screw expansion machine is specifically for the expansion of gas development and optimization. Is mainly composed of a pair of intermesh of screw rotor and chassis, to clearance between rotor and rotor, the rotor and the casing seal, form a work cavity volume can change continuously, contains quantity of heat of gas laser cavity adiabatic expansion into work, drive the rotor rotating power, expanding power at the same time, pressure and temperature of the working medium is reduced, to achieve thermal power conversion. The intake of screw expander can be saturated steam or even liquid steam. The relative motion between the screws can limit scaling, and scaling can also reduce the clearance and improve the efficiency. Screw expander has a wide range of variable working conditions, even in low load will still have a high efficiency.

At present, Xinlan's screw expansion generator sets have been widely used in steel industry waste heat power generation, industrial surplus pressure power generation, geothermal power generation and bioenergy power generation. The projects are mainly distributed in steel, petrochemical, plastic, chemical fiber, geothermal, biomass and other industries. Xinran's high-end screw expansion power generation system is running efficiently and stably.

• Wide range of working media, Suitable for saturated steam, vapor-liquid phases, high-pressure hot water, and other mediums for energy recovery, without special requirements for the quality of the working media.
• The efficiency of steam screw expander is insensitive to variations in working media parameters and load changes. It can adapt to the fluctuating production demands, heat and electricity loads of industrial and mining enterprises, as well as changes in waste heat, residual pressure, and media quality, maintaining stable high efficiency, with safe and reliable operations.
• The entire unit of steam screw expander is pre-assembled at the factory and ready for immediate operation after on-site connection and commissioning. The necessity to be returned to the factory for major repairs is minimal, since it requires low technical and equipment demands for maintenance, without the need for a specialized team or facility, ensuring short maintenance periods.
• Unlike steam turbines, the rotor will not experience accidents during overspeed conditions; it features a high starting torque and can start directly under load.
• Offers round-the-clock operation without supervision for stable and safe performance. The control system features automatic control, fault monitoring, and alarm functions, making operation simple and convenient. The power generation system uses imported regulators and synchronization devices for automatic synchronization and grid connection of the generator.
• Features simple thermodynamic system, the site installation workload is minimal and requires a low unit investment. It offers a short payback period, and provides significant environmental benefits.