CN208779124U - LNG Dewar bottle is lossless to fill circuit - Google Patents

Abstract

Circuit is filled the utility model discloses a kind of LNG Dewar bottle is lossless, it is characterized by comprising LNG basin, outlet tube section, low temperature filling pump, feed liquor pipeline section is filled, fills bypass, fills return-air pipeline section and the Dewar bottle of several LNG to be filled, the both ends for filling bypass are connect with filling feed liquor pipeline section and fill return-air pipeline section respectively, are filled the upper sequence setting of bypass and are filled bypass low temperature check-valves and aperture current-limiting apparatus.There is the utility model unique bypass aperture current limliting and return-air to design, and prevents pipeline and suppresses liquid phenomenon, fill it is high-efficient, lose it is small, have a safety feature.

Description

LNG Dewar bottle is lossless to fill circuit

Technical field

The utility model relates to LNG filling equipment fields, fill circuit more particularly to a kind of LNG Dewar bottle is lossless.

Background technique

LNG (Liquefied Natural Gas) is known as liquefied natural gas, is a kind of clean fuel, by natural gas through net After change handles (impurity such as emergence work, sulfide, heavy hydrocarbon, water), deep cooling becomes liquid by gaseous state and obtains to -162 DEG C under normal pressure It arrives.The volume of liquefied natural gas is about the 1/620 of the natural gas volume of phase homogenous quantities, and weight is about 45% or so of androgynous ponding, It is widely used.Since the critical-temperature of LNG is far below environment temperature, so can only be stored using the condition transport freezed entirely, It is transported at a temperature of atmospheric boiling point.

Currently, in order to improve the efficiency that fills of LNG, being needed when LNG cryogenic liquid is dispensed into single Dewar bottle from basin Dewar bottle is exhausted, be fillinged liquid on one side be vented while；For the pipeline filled with pump, generally requires and first cryogenic pump is carried out It being pre-chilled, in precooling process, the liquid feed valve etc. filled in feed liquor circuit needs to close, in pump pre-cooling and filling process, filling tube The input in cold draining and external heat is routed, a large amount of BOG can be generated, this part BOG enters Dewar bottle or cryogenic liquid basin In be easy to generate superpressure discharge.For without the fueling station for filling bypass, due to misoperation, pump is also easy to during startup It leads to the problem of and builds the pressure.

Utility model content

In view of the above technical problems, the utility model provides that a kind of LNG Dewar bottle is lossless to fill circuit, has uniqueness Bypass aperture current limliting and return-air design, fill it is high-efficient, loss it is small, have a safety feature.

To realize the above-mentioned technical purpose, the utility model adopts the technical scheme that

A kind of LNG Dewar bottle is lossless to fill circuit, it is characterised in that: including LNG basin, outlet tube section, low temperature filling pump, Feed liquor pipeline section is filled, bypass is filled, fills return-air pipeline section and the Dewar bottle of several LNG to be filled, the liquid outlet of the LNG basin The inlet of low temperature filling pump is connected by outlet tube section, the liquid outlet of low temperature filling pump connects Dewar by filling feed liquor pipeline section The inlet of bottle；The Dewar bottle and LNG basin are equipped with gas returning port, and the gas returning port of Dewar bottle is by filling the connection of return-air pipeline section The gas returning port of LNG basin；The both ends for filling bypass are connect with filling feed liquor pipeline section and fill return-air pipeline section respectively, fill side It road and fills to be equipped between feed liquor pipeline section and fills bypass hand stop valve, fill the upper sequence setting of bypass and fill bypass low temperature non-return Valve and aperture current-limiting apparatus.

Preferably, the return-air pipeline section that fills is equipped with return-air hose, return-air cryogenic globe valve and return-air low temperature check-valves, Return-air hose is used to connect the gas returning port of Dewar bottle.

Preferably, the feed liquor pipeline section that fills is equipped with several groups feed liquor low temperature pneumatic operated valve, feed liquor low temperature check-valves, feed liquor Low-temperature safety valve, manual vent valve and hose is filled, fills hose for connecting the inlet of Dewar bottle.

Preferably, the aperture current-limiting apparatus is that inside sets round-meshed orifice plate, limit flow be the 20% of normal discharge with Under.

The utility model is provided on filling feed liquor pipeline section and fills bypass, fills bypass and is equipped with aperture current-limiting apparatus, It is opened in precooling process in low temperature filling pump, will not open and cause because of the feed liquor low temperature pneumatic operated valve filled in inlet pipe Pipeline suppresses liquid phenomenon；The pre-cooling of low temperature filling pump terminates, and feed liquor low temperature pneumatic operated valve is opened and carried out in filling process to Dewar bottle, can Bypass hand stop valve, which is filled, with closing as needed fills speed guarantee Dewar bottle；The setting for filling return-air pipeline section, can To guarantee that Dewar bottle fills the recycling of high pressure gas BOG in bottle in front and back and filling process, without externally discharging, energy is saved Source, and can be improved and fill efficiency and safety.

By adopting the above-described technical solution, the utility model has the following technical effect that the utility model has uniqueness Bypass aperture current limliting and return-air design, prevent pipeline and suppress liquid phenomenon, fill it is high-efficient, loss it is small, have a safety feature.

Detailed description of the invention

The utility model will illustrate by example and with reference to the appended drawing, in which:

Fig. 1 is the structural schematic diagram of the utility model.

Specific embodiment

All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive Feature and/or step other than, can combine in any way.

Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics ?.

A kind of LNG Dewar bottle as shown in Figure 1 is lossless to fill circuit, including LNG basin 17, outlet tube section 18, low temperature fill Armored pump 16 fills feed liquor pipeline section 1, fills bypass 19, filling return-air pipeline section 15 and the Dewar bottle 14 of several LNG to be filled, described The liquid outlet of LNG basin 17 connects the inlet of low temperature filling pump 16, the liquid outlet of low temperature filling pump 16 by outlet tube section 18 The inlet of Dewar bottle 14 is connected by filling feed liquor pipeline section 1；Dewar bottle 14 and LNG basin 17 are equipped with gas returning port, Dewar bottle 14 gas returning port connects the gas returning port of LNG basin 17 by filling return-air pipeline section 15；Fill bypass 19 both ends respectively with fill Feed liquor pipeline section 1 is connected with return-air pipeline section 15 is filled, and is filled bypass 19 and is filled between feed liquor pipeline section 1 equipped with low temperature hand stop valve 3, fill bypass 19 on sequentially setting fill bypass low temperature check-valves 4 and aperture current-limiting apparatus 5, aperture current-limiting apparatus 5 can be used Round-meshed orifice plate is set for inside, limit flow is 20% or less normal discharge.It fills the outlet of bypass 19 and fills return-air pipeline section 15 outlet is connected to the gas returning port of LNG basin 17.Due to being equipped with aperture current-limiting apparatus, precooling process is opened in low temperature filling pump In, keep filling the dynamic property of LNG stream in inlet pipe by filling bypass, it will not be because of the feed liquor emergency cut-off filled in inlet pipe Valve is not opened and pipeline is caused to suppress liquid phenomenon, and flow is smaller and is back in basin, not will cause LNG loss.Low temperature fills Pump pre-cooling terminates, and feed liquor low temperature pneumatic operated valve is opened and can according to need closing in filling process and fill side to Dewar bottle Road hand stop valve fills speed guarantee Dewar bottle.

As shown in Figure 1, filling feed liquor pipeline section 19 equipped with several groups feed liquor low temperature pneumatic operated valve 2, feed liquor low temperature in the present embodiment Check-valves 6, feed liquor low-temperature safety valve 7, manual vent valve 8 and fill hose 9, fill hose 9 for connect Dewar bottle 14 into Liquid mouth fills return-air pipeline section 15 equipped with return-air hose 11, return-air cryogenic globe valve 12 and return-air low temperature check-valves 13, return-air hose 11, for connecting the gas returning port of Dewar bottle 14, fill the setting of return-air pipeline section, it is ensured that Dewar bottle fills front and back and filled In journey in bottle high pressure gas recycling, without externally discharging, and can be improved and fill efficiency.

The utility model is not limited to specific embodiment above-mentioned.The utility model expands to any in this specification The new feature of middle disclosure or any new combination, and disclose any new method or process the step of or any new group It closes.

Claims (4)

1. a kind of LNG Dewar bottle is lossless to fill circuit, it is characterised in that: including LNG basin (17), outlet tube section (18), low temperature Filling pump (16), the Dewar fill feed liquor pipeline section (1), fill bypass (19), filling return-air pipeline section (15) and several LNG to be filled Bottle (14), inlet of the liquid outlet of the LNG basin (17) by outlet tube section (18) connection low temperature filling pump (16), low temperature The liquid outlet of filling pump (16) connects the inlet of Dewar bottle (14) by filling feed liquor pipeline section (1)；The Dewar bottle (14) and LNG basin (17) is equipped with gas returning port, and the gas returning port of Dewar bottle (14) is by filling return-air pipeline section (15) connection LNG basin (17) Gas returning port；The both ends for filling bypass (19) are connect with filling feed liquor pipeline section (1) and fill return-air pipeline section (15) respectively, are filled Dress, which bypasses (19) and fills to be equipped between feed liquor pipeline section (1), fills bypass hand stop valve (3), fills and sequentially sets on bypass (19) It sets and fills bypass low temperature check-valves (4) and aperture current-limiting apparatus (5).

2. LNG Dewar bottle according to claim 1 is lossless to fill circuit, it is characterised in that: described to fill return-air pipeline section (15) return-air hose (11), return-air cryogenic globe valve (12) and return-air low temperature check-valves (13), return-air hose (11) is equipped with to be used for Connect the gas returning port of Dewar bottle (14).

3. LNG Dewar bottle according to claim 1 is lossless to fill circuit, it is characterised in that: described to fill feed liquor pipeline section (1) Equipped with several groups feed liquor low temperature pneumatic operated valve (2), feed liquor low temperature check-valves (6), feed liquor low-temperature safety valve (7), manual vent valve (8) With fill hose (9), fill hose (9) for connecting the inlets of Dewar bottle (14).

4. LNG Dewar bottle according to claim 1 is lossless to fill circuit, it is characterised in that: the aperture current-limiting apparatus (5) Round-meshed orifice plate is set for inside, limit flow is 20% or less normal discharge.