Pressure energy recycling equipment and pipeline pressure energy recycling system

Abstract

The invention discloses pressure energy recycling equipment and a pipeline pressure energy recycling system. The pressure energy recycling equipment comprises a main shaft extended in the longitudinaldirection, a first expander assembly, a second expander assembly and a power generation assembly. The first expander assembly is provided with a first air inlet and a first air outlet, the second expander assembly is provided with a second air inlet and a second air outlet, the second air inlet can be connected with the first air outlet, the first expander assembly and the second expander assembly can drive the main shaft to rotate, and the power generation assembly is arranged on the main shaft. In the axial direction of the main shaft, a first bearing with which the main shaft is sleeved isarranged between the power generation assembly and the first expander assembly, and a second bearing with which the main shaft is sleeved is arranged between the power generation assembly and the second expander assembly. Pressure loss in pipeline pressure energy recycling can be reduced through the pressure energy recycling equipment and the pipeline pressure energy recycling system.

Description

technical field [0001] The invention relates to the field of pipeline pressure energy recovery, in particular to a pressure energy recovery equipment and a pipeline pressure energy recovery system. Background technique [0002] In order to improve the efficiency of natural gas pipeline transportation, the natural gas in the national natural gas pipeline network always maintains a high pressure during the pipeline transportation process. The pressure is generally around 10MPa, which is much higher than the pressure of 0.4MPa for urban residents. There is huge pressure energy between the main line and the low-pressure natural gas branch line, and the traditional pressure regulating valve device cannot realize energy recovery, resulting in a lot of waste. Using the expander to cooperate with the power generation system to convert the pressure energy into electric energy, recycling this part of the pressure energy can not only produce significant economic benefits, but also elim...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this design is that the process is complicated and the degree of system integration is low. Since each turboexpander 101a or 101b is equipped with two sets of static pressure gas bearings 102a or 102b, the existing turboexpander will Multiple sets of static pressure gas bearings 102a, 102b need to be matched respectively, thus losing part of the pressure energy

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