Organic Rankine cycle kilowatt power generation device

Abstract

The invention relates to an organic Rankine cycle kilowatt power generation device. The device comprises a radial inflow turbine, a reduction gearbox, a coupling and a generator; a high-speed shaft of the reduction gearbox is directly connected with the radial inflow turbine; and a low-speed shaft of the reduction gearbox is connected with the generator through the coupling. The device is characterized in that the radial inflow turbine comprises a volute, an impeller, a nozzle blade grid, a sealing shell and a sealing system; the sealing shell is fixedly mounted on the reduction gearbox; the volute is mounted on the sealing shell through a bolt; the impeller is positioned in the volute, and is fixedly mounted on the high-speed shaft of the reduction gearbox; the nozzle blade grid is fixedly mounted in a channel formed by the volute and the sealing shell; and the nozzle blade grid is annular, and is positioned at the outer periphery of the impeller. The device enables a power unit system to achieve compactness, high efficiency and reliability, and meanwhile, achieves zero leakage of organic working mediums.

Description

technical field [0001] The invention belongs to the technical field of organic working fluid power generation, and in particular relates to an organic Rankine cycle kilowatt-level power generation device. Background technique [0002] At present, the medium and high temperature waste heat in industrial production is basically fully utilized, but the low temperature waste heat below 200 °C cannot be recovered and applied by conventional steam turbine technology due to reasons such as strong dispersion, low grade, and small quantity. The organic Rankine cycle uses organic working fluid instead of water as the medium, and utilizes the characteristics of low boiling point of organic working fluid to generate high-pressure saturated or low-superheat steam at a relatively low heat source temperature to generate power. The Organic Rankine Cycle (ORC) can use the heat of low-temperature flue gas, hot water, saturated steam, and heat transfer oil to generate electricity. At present,...

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Problems solved by technology

Among them, the axial flow turbine often needs multi-stage cascades in ORC due to the small pressure ratio of the single stage and the large flow rate, resulting in a large unit size and complex structure. The centripetal turbine has high efficiency, compact structure, high expansion ratio, and large enthalpy. downgrade advantage

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