A Calculation Method for the Height of Venting Standpipe in Natural Gas Transmission Pipeline
A technology for venting risers and calculation methods, which is applied in calculations, special data processing applications, instruments, etc., and can solve problems such as difficulty in obtaining safe, accurate and reasonable heights of venting risers, no calculation process, and inability to meet actual application requirements, etc.
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Embodiment 1
[0120] For a natural gas pipeline, the valve chamber located in the first-level area needs to design and build a vent riser, and calculate the specific height of the riser.
[0121] S011. The diameter of the main line pipeline to which the vent riser belongs is collected and obtained is 1026mm (1.026m), and the operating pressure is 5Mpa (5×10 6 Pa), the distance between valve chambers is 32km (3.2×10 4 m), the natural gas compression factor is 0.87, the operating temperature is 20°C (293K), and the maximum venting time is 8h (2.88×10 4 s), the level of the area where the vent riser is located is Class I, there are no buildings within 10m, and the local average wind speed u at a height of 20m ∞ =8.94m / s;
[0122] S012. Calculate the relevant parameters required for calculating the natural gas vent riser according to the basic data;
[0123] Among them, the mass flow rate of natural gas venting:
[0124] m q = 2 ...
Embodiment 2
[0147] Calculate the specific height of the venting riser of the valve chamber of the gas pipeline in Example 1, which is located in the second, third, and fourth-level areas.
[0148] S021. The diameter of the main line pipeline to which the vent riser belongs is collected and obtained is 1026mm (1.026m), and the operating pressure is 5Mpa (5×10 6 Pa), the distance between valve chambers is 32km (3.2×10 4 m), the natural gas compression factor is 0.87, the operating temperature is 20°C (293K), and the maximum venting time is 8h (2.88×10 4 s), the level of the area where the vent riser is located is Class I, there are no buildings within 10m, and the local average wind speed u at a height of 20m ∞ =8.94m / s;
[0149] S022. Calculate the relevant parameters required for calculating the natural gas vent riser according to the basic data;
[0150] Among them, the mass flow rate of natural gas venting:
[0151] m q = 2 ...
Embodiment 3
[0175] Calculating the gas transmission pipeline described in Example 1 at the maximum emptying time shortened by 6h (2.16×10 4s) After venting the riser height of the first level area of the valve chamber.
[0176] S031. The diameter of the main line pipeline to which the vent riser belongs is collected and obtained is 1026mm (1.026m), and the operating pressure is 5Mpa (5×10 6 Pa), the distance between valve chambers is 32km (3.2×10 4 m), the natural gas compression factor is 0.87, the operating temperature is 20°C (293K), and the maximum venting time is 8h (2.88×10 4 s), the level of the area where the vent riser is located is Class I, there are no buildings within 10m, and the local average wind speed u at a height of 20m ∞ =8.94m / s;
[0177] S035. Calculate the relevant parameters required for calculating the natural gas vent riser according to the basic data;
[0178] Mass flow of natural gas venting:
[0179] m q = ...
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