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Independent pressure regulating device and method of natural gas expander

A pressure regulating device and natural gas technology, which is applied in the direction of steam engine devices, mechanical equipment, machines/engines, etc., can solve the problems of large pressure fluctuations at the outlet of the expander, high heat source requirements, and complex heating systems, etc., to reduce the limitations of geographical conditions, Control precise effects

Active Publication Date: 2017-10-13
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the heating system of this device is relatively complicated, and the requirements for heat sources are relatively high, and the accuracy of pressure regulation needs to be further improved, and in the process of using this device to regulate the pressure of natural gas, there is a defect that the pressure fluctuation at the outlet of the expander is large

Method used

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  • Independent pressure regulating device and method of natural gas expander
  • Independent pressure regulating device and method of natural gas expander

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Embodiment 1

[0062] Such as figure 1 A schematic diagram showing the structure of an independent pressure regulating device for a natural gas expander according to an embodiment of the present invention figure 1 . Such as figure 1 As shown, the device mainly includes a natural gas system and a control system. The natural gas system is mainly used to depressurize the natural gas in the high-pressure pipeline network and recover the pressure energy to a level that can lead to the low-pressure pipeline network and then to the user side. It is mainly used to optimize the level of natural gas leading to the low-pressure pipeline network and increase the recovery level of pressure energy by adjusting the parameters in the aforementioned "pressure reduction and recovery of pressure energy" process.

[0063] Continue to refer figure 1 , The natural gas system mainly includes a heater 10, a pressure regulating valve 11, an expander 12, a generator 13 and a buffer tank 14. among them:

[0064] The f...

Embodiment 2

[0096] figure 2 It shows a schematic structural diagram of an independent pressure regulating device for a natural gas expander according to another embodiment of the present invention. Such as figure 2 As shown, the difference between Embodiment 2 and Embodiment 1 is that the natural gas inlet of the pressure regulating valve 11 in the device is connected to the low-pressure pipe network, that is, the pre-heated fuel is low-pressure natural gas that can directly lead to the user terminal. Compared with Embodiment 1, the solution of this embodiment improves the safety of the pre-heating link, and therefore is more suitable for application scenarios where safety requirements are high but the pre-heating scale and degree are smaller than those of Embodiment 1. The other parts of the device are similar to the embodiment, and the voltage regulation method of the device is basically the same as that of the embodiment, and will not be repeated here.

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Abstract

The invention relates to the field of natural gas pressure regulation and pressure energy recycling, and particularly provides an independent pressure regulating device and an independent pressure regulating method of a high-precision natural gas expander. The device comprises a natural gas system, a control system and a monitoring terminal, wherein the natural gas system is used for reducing pressure of natural gas in an upstream high-pressure pipe network and recycling pressure energy and is used for introducing the natural gas of which the pressure is reduced and the pressure energy is recycled to a downstream lower-pressure pipe network, the control system comprises a center controller which is used for regulating corresponding parameters when the pressure is reduced and the pressure energy is recycled, and the monitoring terminal is used for receiving data transmitted by the center controller and sending a data read request to the center controller. According to the pressure regulating device and the pressure regulating method, the pressure energy of the natural gas is recycled, and additionally, high-precision pressure regulation of the natural gas is realized only by utilizing the independent expander without a pressure regulating valve.

Description

Technical field [0001] The invention relates to the field of natural gas pressure regulation and pressure energy recovery and utilization, in particular to an independent pressure regulation device and method for a high-precision natural gas expander. Background technique [0002] With the further popularization of natural gas in urban and rural life and various industrial fields, my country's natural gas consumption has clearly shown an upward trend year by year. In 2016, my country's total natural gas consumption has exceeded 200 billion m 3 . Before the natural gas in the high-pressure pipeline network enters the user end (residential user or industrial user), it needs to be transported from the long-distance pipeline to the urban pipeline network (low-pressure pipeline network). In this transportation process, the pressure of natural gas is gradually adjusted (reduced pressure) from 6MPa or even above 10MPa, and finally reaches the pressure required by the user. At present, ...

Claims

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Application Information

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IPC IPC(8): F17D1/04F17D3/01F01K25/08F01K13/02
CPCF01K13/02F01K25/08F17D1/04F17D3/01
Inventor 熊亚选史晓霞徐鹏詹淑慧陈红兵王刚刘蓉
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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