CN-119713141-B - Helium liquefaction section steady voltage and steady flow air intake system suitable for gas field

CN119713141BCN 119713141 BCN119713141 BCN 119713141BCN-119713141-B

Abstract

The invention provides a helium liquefaction section pressure-stabilizing and flow-stabilizing air inlet system suitable for a gas field, which particularly relates to the technical field of low-temperature refrigeration, wherein the helium liquefaction section pressure-stabilizing and flow-stabilizing air inlet system suitable for the gas field is connected with a first valve through an outlet end of a first buffer tank, a first branch of the outlet end of the first valve is sequentially connected with a second valve, a first electric control valve, a first one-way valve and a third valve and is connected with a first inlet end of a cold box, two ends of the fourth valve are respectively connected with an inlet end of the second valve and an outlet end of the third valve to form a high-pressure air inlet branch, the second branch of the outlet end of the first valve is sequentially connected with the fifth valve and the second inlet end of the second buffer tank to form a buffer air inlet branch, and the stability of the helium liquefaction section pressure and flow stabilizing air inlet system can be improved by the two air inlet branches, so that the air pressure and flow fluctuation can be well controlled.

Inventors

ZHANG YU
HE MING
ZHOU GANG
LI ZHENGYU
GONG LINGHUI
LIU LIQIANG
LI QIANG
ZHANG MEIMEI
XU HONGBO

Assignees

中国科学院理化技术研究所

Dates

Publication Date: 20260512
Application Date: 20241218

Claims (7)

1. The utility model provides a helium liquefaction section steady voltage steady flow air intake system suitable for gas field which characterized in that includes regulation and control unit and liquefaction unit, wherein: The regulating and controlling unit comprises a first buffer tank, a first valve, a second valve, a first electric control valve, a first one-way valve, a third valve, a fourth valve and a fifth valve; The liquefying unit comprises a compressor unit, a high-precision oil filtering module, a second buffer tank and a cold box, wherein a first outlet end of the cold box is sequentially connected with the compressor unit, the high-precision oil filtering module and a first inlet end of the cold box, a first outlet end of the second buffer tank, a first inlet end of the first buffer tank, a first inlet end of the cold box and a second inlet end of the second buffer tank are connected, an outlet end of the first buffer tank is connected with a first valve, a first branch of the outlet end of the first valve is sequentially connected with the second valve, a first electric control valve, a first one-way valve, a third valve and the first inlet end of the cold box are sequentially connected, two ends of the fourth valve are respectively connected to the inlet end of the second valve and the outlet end of the third valve to form a high-pressure air inlet branch, a second branch of the first valve outlet end is sequentially connected with the fifth valve and the second inlet end of the second buffer tank to form a buffer air inlet branch, and helium enters a circulating loop through the second buffer tank; Still include first peak helium gas supply valves and second peak helium gas supply valves, first peak helium gas supply valves set up in between the fifth valve to the second buffer tank, the second peak helium gas supply valves set up in high-definition filter to between the first entry end of cold box, first peak helium gas supply valves with be provided with the interface on the second peak helium gas supply valves.
2. The helium liquefaction section pressure and flow stabilizing air inlet system suitable for a gas field according to claim 1, further comprising a second electrically controlled valve and a sixth valve, wherein the second electrically controlled valve is sequentially connected to the sixth valve and an inlet end of the first buffer tank.
3. The helium liquefaction stage pressure and flow stabilizing air intake system for a gas field of claim 2, further comprising a refining section connected to the second electronically controlled valve inlet port by a refining section interface.
4. A helium liquefaction stage pressure and flow stabilizing air inlet system suitable for a gas field according to claim 3, further comprising a filter unit, wherein the filter unit comprises at least two filter groups connected in parallel, the filter groups comprise filters and seventh valves arranged on two sides of the filters, and the filter unit is arranged between the refining section and the inlet end of the second electric control valve.
5. The helium liquefaction section pressure and flow stabilizing air inlet system suitable for a gas field according to claim 4, further comprising a return working section, wherein the return working section comprises a measurement and control transmission and distribution module reflux valve, an eighth valve and a directional neon content analyzer, two ends of the measurement and control transmission and distribution module reflux valve are respectively connected between the filtering unit and the inlet end of the second electric control valve and the refining working section, and two sides of the directional neon content analyzer are respectively connected with two ends of the measurement and control transmission and distribution module reflux valve through two eighth valves.
6. The helium liquefaction section pressure and flow stabilizing air inlet system suitable for a gas field according to claim 1, further comprising a liquid helium distribution box, wherein a first outlet end and a first inlet end of the liquid helium distribution box are respectively connected with a second inlet end and a second outlet end of the cold box.
7. The helium liquefaction stage pressure and flow stabilizing gas inlet system suitable for use in a gas field of claim 6, further comprising a liquid helium gas distribution interface connected to the second outlet end and the second inlet end of the liquid helium distribution box.

Description

Helium liquefaction section steady voltage and steady flow air intake system suitable for gas field Technical Field The invention relates to the technical field of low-temperature refrigeration, in particular to a helium liquefaction section pressure and flow stabilizing air inlet system suitable for a gas field. Background Helium liquefaction equipment is key core equipment for realizing helium liquefaction, pipeline raw gas entering a helium liquefaction front section usually passes through process sections such as membrane separation, crude extraction, refining and the like in sequence, the pipeline raw gas possibly contains neon, and pressure and flow fluctuation occurs under the influence of a wellhead and an upstream process section. Liquid helium in the market can be divided into neon-containing liquid helium and neon-free liquid helium, wherein the neon-free liquid helium has higher purity, is more difficult to prepare and has higher price, and if the content of neon in pipeline raw material gas before entering a helium liquefaction section exceeds the standard, the efficiency of helium liquefaction can be influenced, so that the helium liquefaction section cannot continuously run, further the production of liquid helium is influenced, and further the liquefaction efficiency of the helium liquefaction section is influenced. In the prior art, a process pipeline is arranged before a helium liquefying device for direct connection, but the mode can not effectively inhibit pressure and flow fluctuation of the natural gas inlet raw gas of a pipeline with low helium content. Disclosure of Invention In order to solve the problem that an air inlet system for helium liquefaction cannot control air pressure and flow fluctuation, the invention provides a helium liquefaction section pressure and flow stabilizing air inlet system suitable for a gas field. The invention is realized by the following technical scheme: the invention provides a helium liquefaction section pressure and flow stabilizing air inlet system suitable for a gas field, which comprises a regulating and controlling unit and a liquefaction unit, wherein: The regulating and controlling unit comprises a first buffer tank, a first valve, a second valve, a first electric control valve, a first one-way valve, a third valve, a fourth valve and a fifth valve; The liquefaction unit comprises a compressor unit, a high-precision oil filtering module, a second buffer tank and a cold box, wherein a first outlet end of the cold box is sequentially connected with the compressor unit, the high-precision oil filtering module and a first inlet end of the cold box, a first outlet end of a second buffer tank, a first inlet end of the second buffer tank and a first inlet end and a second inlet end of the cold box are connected, an outlet end of the first buffer tank is connected with a first valve, a first branch of the outlet end of the first valve is sequentially connected with a second valve, a first electric control valve, a first one-way valve, a third valve and a first inlet end of the cold box are connected, two ends of the fourth valve are respectively connected with the inlet end of the second valve and the outlet end of the third valve to form a high-pressure air inlet branch, and a second branch of the outlet end of the first valve is sequentially connected with the fifth valve and the second inlet end of the second buffer tank to form a buffer air inlet branch. Further, the buffer tank further comprises a second electric control valve and a sixth valve, and the second electric control valve is sequentially connected with the sixth valve and the inlet end of the first buffer tank. Further, the device also comprises a refining section, and the refining section is connected with the inlet end of the second electric control valve through a refining section interface. Further, the device also comprises a filter unit, wherein the filter unit comprises at least two filter groups which are connected in parallel, each filter group comprises a filter and seventh valves arranged on two sides of the filter, and the filter unit is arranged between the refining section and the inlet end of the second electric control valve. The device comprises a filter unit, a second electric control valve, a refining section, a control transmission and distribution module, a reverse flow valve of the control transmission and distribution module, an eighth valve and a directional neon content analyzer, wherein the reverse flow valve of the control transmission and distribution module is connected between the filter unit and the inlet end of the second electric control valve, and the two sides of the directional neon content analyzer are connected with the two ends of the reverse flow valve of the control transmission and distribution module through two eighth valves. Further, the system further comprises a first peak helium gas supply valve bank and a second peak helium gas supply va