Closed radial double-rotor natural gas residual pressure power generation device

Abstract

According to the closed radial double-rotor natural gas excess pressure power generation device, gas acts on a left impeller and a right impeller respectively, so that an inner rotor and an outer rotor rotate relatively, and the power generation capacity and the device stability are improved. Comprising a shell system, an energy conversion system, a power generation system, a power transmission system, a natural gas input shunting pipeline and a natural gas output converging pipeline, the power generation system comprises an inner rotor and an outer rotor, the rotation directions of the inner rotor and the outer rotor are opposite, and the outer rotor outputs electric energy through the power transmission system; the shell system is provided with a left cavity, a middle cavity and a right cavity which are sequentially arranged, a power generation system is arranged in the middle cavity, the left cavity and the right cavity are connected with a natural gas input shunting pipeline and a natural gas output converging pipeline respectively, energy conversion systems are arranged in the left cavity and the right cavity respectively, the energy conversion system in the left cavity is in power connection with the outer rotor, and the energy conversion system in the right cavity is in power connection with the outer rotor. And the energy conversion system in the right cavity is in power connection with the inner rotor.

Description

technical field [0001] The invention relates to the technical field of natural gas power generation, in particular to a closed radial double-rotor natural gas residual pressure power generation device. Background technique [0002] In the current natural gas extraction process, the gas pressure of natural gas from the bottom of the well to the natural gas production tree is usually 20-70MPa, while the inbound pressure of the oil and gas treatment plant is 6-10MPa, but the actual pipeline pressure used by the user is about 0.4MPa. That is to say, in the process of natural gas being extracted from the bottom of the well to the user, the natural gas needs to be throttled and depressurized. This treatment means that a large amount of natural gas pressure energy will be wasted. And at the same time of throttling and reducing pressure, due to the generation of natural gas hydrate and the sharp drop in temperature, ice blockage usually occurs. In order to prevent ice blockage, oil ...

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Problems solved by technology

[0004] In recent years, some natural gas pipeline residual pressure power generation devices have also been disclosed in China, such as: Patent No. "CN201220331890.0" announced a natural gas differential pressure power generation system based on high-precision pressure control and temperature control. The system consists of sensors, pressure regulating valves, intelligent Composed of control units and multi-mechanical energy conversion devices, the performance of the natural gas pipeline power generation system is optimized; the patent number "CN201310260259.5" discloses a wellhead natural gas pressure energy power generation system, which is mainly composed of a gas well Xmas tree, a pressure regulating valve, Composed of separator, tubular heat exchanger, multi-stage air motor, generator, natural gas pipeline, air motor outlet pressure regulating valve and sewage throttle valve, the system uses high-pressure natural gas as the gas source to drive the multi-stage air motor for more efficient On the basis of power generation, heat exchange and decontamination devices are installed to improve the quality of natural gas and prevent ice blockage. However, from the perspective of natural gas pressure difference utilization, the structural components of the above-mentioned system are complex, and installation, commissioning and construction are difficult , so extensive demonstration is required in the design and use of

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