CN102032440A

CN102032440A - Gas-liquid separator for liquefied natural gas filling system

Info

Publication number: CN102032440A
Application number: CN2009100356138A
Authority: CN
Inventors: 陈昭宇; 叶勇; 陈来生
Original assignee: Shenghui Gas & Chemical Systems (zhangjiagang) Co Ltd
Current assignee: Shenghui Gas & Chemical Systems (zhangjiagang) Co Ltd
Priority date: 2009-09-28
Filing date: 2009-09-28
Publication date: 2011-04-27

Abstract

The invention discloses a gas-liquid separator for a liquefied natural gas filling system. The gas-liquid separator comprises an inner shell and an outer shell which is positioned outside the inner shell, wherein a vacuumized shell partition cavity is formed between the inner shell and the outer shell; both sides of the bottom of the inner shell are provided with a liquid inlet pipe and a liquid outlet pipe respectively; the top of the inner shell is provided with a gas return pipe; the liquid inlet pipe, the liquid outlet pipe and the gas return pipe are communicated with the cavity of the inner shell and are vacuum buffer pipes; outer casings are arranged outside the liquid inlet pipe, the liquid outlet pipe and the gas return pipe and are vacuum pipes; and vacuumized pipe partition cavities are formed between the outer casing and the liquid inlet pipe as well as between the liquid outlet pipe and the gas return pipe. The gas-liquid separator is suitable for a gas filling system of a liquefied natural gas filling station.

Description

Gas filling of liquefied natural gas system gas-liquid separator

Technical field

The invention belongs to the refueling system technical field at gas filling of liquefied natural gas station.

Background technique

The refueling system at conventional gas filling of liquefied natural gas station is: the LNG Liquefied natural gas basin connects the cryopump pond, cryopump pond connection traffic meter, and flowmeter connects filling machine.But in actual applications, because LNG Liquefied natural gas gasifies easily, this refueling system causes the flowmeter metering inaccurate easily, and makes filling machine cavitation erosion amount bigger than normal, and the gasification of LNG Liquefied natural gas loss in the pipeline also makes the cost at gas filling of liquefied natural gas station increase.

Summary of the invention

Technical problem to be solved by this invention is: the gas filling of liquefied natural gas system gas-liquid separator that will provide a kind of and can make that flowmeter accurate measurement, filling machine cavitation erosion quantitative change is little, the gasification loss reduces in the pipeline.

For addressing the above problem, the technical solution used in the present invention is: gas filling of liquefied natural gas system gas-liquid separator, comprise inner housing and the frame that is positioned at the inner housing outside, the housing separate space that vacuumizes is arranged between inner housing and the frame, the two bottom sides of inner housing is respectively arranged with liquid inlet pipe and drain pipe, the top of inner housing is provided with muffler, liquid inlet pipe, drain pipe and muffler all with the intracavity inter-connection of inner housing, described liquid inlet pipe, drain pipe and muffler are the vacuum buffer pipe, there is the feed liquor outer sleeve outside of liquid inlet pipe, and the liquid inlet pipe separate space that vacuumizes is arranged between described feed liquor outer sleeve and the liquid inlet pipe; There is the fluid outer sleeve outside of drain pipe, and the drain pipe separate space that vacuumizes is arranged between described fluid outer sleeve and the drain pipe; There is the return-air outer sleeve outside of muffler, and the muffler separate space that vacuumizes is arranged between described return-air outer sleeve and the muffler.

The invention has the beneficial effects as follows: between the cryopump pond of the refueling system of LNG Liquefied natural gas and flowmeter, install gas-liquid separator of the present invention additional, with the LNG Liquefied natural gas gas-liquid separation of gasifying in the pipeline, thereby make that flowmeter accurate measurement, filling machine cavitation erosion quantitative change is little, the gasification loss reduces in the pipeline, Qi Hua LNG Liquefied natural gas in addition, become LNG Liquefied natural gas by gas recovery system, continue to utilize.

Description of drawings

Fig. 1 is the structural representation of gas filling of liquefied natural gas of the present invention system with gas-liquid separator;

Fig. 2 is the plan structure schematic representation of Fig. 1;

Fig. 3 is the connection diagram that gas-liquid separator of the present invention uses in the gas filling of liquefied natural gas system.

Among the figure: 1, inner housing, 2, frame, 3, the housing separate space, 4, liquid inlet pipe, 5, drain pipe, 6, muffler, 7, the feed liquor outer sleeve, 8, the fluid outer sleeve, 9, return-air outer sleeve, 10, the liquid inlet pipe separate space, 11, the drain pipe separate space, 12, muffler separate space, 13, cryopump, 14, the LNG Liquefied natural gas basin, 15, flowmeter, 16, filling machine, 17, gas recovery system, 18, thermal insulating material, 19, the fluid autocontrol valve, 20, the return-air autocontrol valve.

Embodiment

Below in conjunction with accompanying drawing, gas filling of liquefied natural gas of the present invention system is described in further detail with the structure of gas-liquid separator.

As Fig. 1, shown in Figure 2, gas filling of liquefied natural gas system gas-liquid separator, it is a hollow casing, comprise inner housing 1 and the frame 2 that is positioned at inner housing 1 outside, the housing separate space 3 that vacuumizes is arranged between inner housing 1 and the frame 2, the two bottom sides of inner housing 1 is respectively arranged with liquid inlet pipe 4 and drain pipe 5, the top of inner housing 1 is provided with muffler 6, liquid inlet pipe 4, drain pipe 5 and muffler 6 all with the intracavity inter-connection of inner housing 1, described liquid inlet pipe 4, drain pipe 5 and muffler 6 are the vacuum buffer pipe, there is feed liquor outer sleeve 7 outside of liquid inlet pipe 4, and the liquid inlet pipe separate space 10 that vacuumizes is arranged between described feed liquor outer sleeve 7 and the liquid inlet pipe 4; There is fluid outer sleeve 8 outside of drain pipe 5, and the drain pipe separate space 11 that vacuumizes is arranged between described fluid outer sleeve 8 and the drain pipe 5; There is return-air outer sleeve 9 outside of muffler 6, the muffler separate space 12 that vacuumizes is arranged between described return-air outer sleeve 9 and the muffler 6, as shown in Figure 3, liquid inlet pipe 4 is connected with the liquid outlet of cryopump 13, and the liquid inlet pipe of cryopump 13 is connected with the liquid outlet of LNG Liquefied natural gas basin 14; Drain pipe 5 is connected with the liquid entering hole of flowmeter 15, and the liquid outlet of flowmeter 15 is connected with filling machine 16, is provided with fluid autocontrol valve 19 between flowmeter 15 and filling machine 16; Muffler 6 is connected with the suction port of gas recovery system 17, between muffler 6 and gas recovery system 17, be provided with return-air autocontrol valve 20, the liquid outlet of gas recovery system 17 is connected with the liquid return hole of LNG Liquefied natural gas basin 14, and all twine with thermal insulating material 18 outside of described each joint.

Working principle of the present invention is: cryopump 13 is extracted the LNG Liquefied natural gas in the LNG Liquefied natural gas basin 14 out, enter the inner housing 1 of gas-liquid separator from the liquid inlet pipe 4 of gas-liquid separator, because the internal cavities of inner housing 1 is bigger, LNG Liquefied natural gas has bigger buffering separated space in inner housing 1, thereby reach the purpose of gas-liquid separation, the rock gas of liquefaction flows out from the drain pipe 5 of gas-liquid separator, through flowmeter 15, by fluid autocontrol valve 19, enter filling machine 16, since in the rock gas of liquefaction natural gas in gaseous state seldom, so the accurate measurement of flowmeter 15, and the cavitation erosion quantitative change of filling machine is little; The rock gas of gasification is discharged from the muffler 6 that is positioned at the gas-liquid separator top, through return-air autocontrol valve 20, enter gas recovery system 17, liquefaction through gas recovery system 17, get back in the LNG Liquefied natural gas basin 14, make gasification loss minimizing in the pipeline, the rock gas of gasification reaches the purpose that continues utilization.

Claims

1. gas filling of liquefied natural gas system gas-liquid separator, it is characterized in that: comprise inner housing and the frame that is positioned at the inner housing outside, the housing separate space that vacuumizes is arranged between inner housing and the frame, the two bottom sides of inner housing is respectively arranged with liquid inlet pipe and drain pipe, the top of inner housing is provided with muffler, liquid inlet pipe, drain pipe and muffler all with the intracavity inter-connection of inner housing, described liquid inlet pipe, drain pipe and muffler are the vacuum buffer pipe, there is the feed liquor outer sleeve outside of liquid inlet pipe, and the liquid inlet pipe separate space that vacuumizes is arranged between described feed liquor outer sleeve and the liquid inlet pipe; There is the fluid outer sleeve outside of drain pipe, and the drain pipe separate space that vacuumizes is arranged between described fluid outer sleeve and the drain pipe; There is the return-air outer sleeve outside of muffler, and the muffler separate space that vacuumizes is arranged between described return-air outer sleeve and the muffler.