CN206522609U - A kind of LNG loading systems - Google Patents

Abstract

The utility model discloses a kind of LNG loading systems, including LNG tank cars and LNG tank area.LNG tank area includes LNG storage tank I, LNG compressor, BOG surge tanks, BOG compressors, BOG drainers, the LNG storage tank II provided with immersed pump；LNG storage tank I bottoms and top connect LNG compressors and BOG thermostats respectively, BOG thermostats, BOG surge tanks, BOG compressors, BOG drainers are sequentially connected, LNG pump in LNG storage tank I is connected with BOG drainers, BOG condensation pot bottom connection LNG storage tanks II, LNG storage tank II, LNG tank cars are connected with BOG thermostats, LNG storage tank II connects LNG tank cars by liquid phase connecting pipe, in parallel be provided with unloads liquid pipe road on liquid pipe, LNG tank cars are provided with the fluid level measuring instrument and pressure detecting table being electrically connected with the controller, controller and LNG pump, immersed pump, power electric connection.The utility model reduces the wasting of resources to BOG recyclings；LNG tank car liquid levels can be accurately measured simultaneously, it is to avoid LNG overflows, safe；LNG handling one, it is convenient and swift.

Description

A kind of LNG loading systems

Technical field

The utility model is related to liquefied natural gas field, specifically a kind of LNG loading systems.

Background technology

Liquefied natural gas (LNG, Liquefied Natural Gas) is that natural gas is formed after purification and condensation liquefaction Liquified natural gas, be a kind of high-grade energy that can be utilized on a large scale, with the characteristics of calorific value is high, Air-pollution From Combustion is small, as The strategic energy of clean and effective, LNG turns into the new focus of world's oil and gas industry, is widely used in national economy. LNG is as the vehicle fuel of high-quality, and compared with vehicle fuel, with octane number height, anti-knock properties are good, burning is complete, exhaust pollution Less, the low advantage of engine life length, operating cost；It is compared with compressed natural gas, then high with efficiency of storage, continual mileage It is long, the advantages of storage bottle pressure is low, lightweight, quantity is small.

During BOG is LNG storages and runed, part LNG evaporations, the flash steam of generation, main component is methane, is one Kind of greenhouse effects very strong gas, if BOG is discharged into air, not only causes serious greenhouse effects, while also making clear Clean energy waste.Therefore, BOG must be handled well while to LNG entruckings, environmental protection and the work of energy-conservation is carried out.

The content of the invention

To solve the above problems, the utility model provides a kind of LNG loading systems.

To solve the above problems, the utility model is adopted the following technical scheme that：A kind of LNG loading systems, including LNG tank cars With LNG tank area, state LNG tank area including LNG storage tank I, LNG compressor, BOG surge tanks, BOG compressors, BOG drainers, be provided with The LNG storage tank II of immersed pump, the LNG compressors are connected by connecting pipe with the fluid inlet of the LNG storage tank I bottoms, BOG thermostats, the BOG thermostats and the BOG surge tanks air inlet are connected by gaseous phase outlet at the top of the LNG storage tank I Connection, BOG surge tanks gas outlet is connected by connecting pipe with the BOG compressors, the BOG compressors and BOG drainers LNG pump is provided with lower end inlet communication, the LNG storage tank I, the LNG pump outlet connection BOG drainers upper inlet end is described The outlet connection LNG storage tank II of BOG condensation pot bottoms import, the LNG storage tank II top exits end is controlled with the BOG Warm device is connected by pipeline, and the port of export of the LNG storage tank II connects LNG tank car inlets by liquid phase connecting pipe, described LNG tank cars gas phase mouth connects the BOG thermostats by gas phase connecting pipe, and be provided with parallel with the liquid pipe unloads liquid pipe Road, the LNG tank cars be provided with fluid level measuring instrument and pressure detecting table, the fluid level measuring instrument, pressure detecting table with control Device electrically connect, the controller also with LNG pump, immersed pump, power electric connection.

Further, the LNG storage tank I is holding vessel with pressure.

Further, liquid level detection device is equipped with the LNG storage tank I, LNG storage tank II, liquid level alarm is located at institute LNG storage tank I, LNG storage tank II surface are stated, and is electrically connected with liquid level detection device.

Further, the liquid phase connecting pipe is provided with flowmeter and control valve I, and the liquid pipe road that unloads is provided with control Valve II.

Further, between the LNG pump and BOG drainers, set respectively between the BOG drainers and LNG storage tank II There are choke valve and flow regulator.

Further, the liquid phase connecting pipe is connected by oil filling riser liquid phase joint with the LNG tank cars inlet, described Gas phase connecting pipe is connected by oil filling riser gas phase joint with the gas phase mouth of the LNG tank cars.

The beneficial effects of the utility model are：The utility model is easy to operate, will can produce in LNG transportations BOG recyclings, reduce the wasting of resources；Meanwhile, it is capable to accurately measure the content of LNG in LNG tank cars, it is to avoid LNG overflows, Unnecessary waste is caused, the security of operation is improved again；LNG handling one, it is convenient and swift.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is circuit block diagram of the present utility model.

In figure, 1, BOG thermostats, 2, BOG surge tanks, 3, BOG compressors, 4, gas phase connecting pipe, 5, BOG drainers, 6th, control valve I, 7, control valve II, 8, oil filling riser gas phase joint, 9, LNG tank cars, 10, oil filling riser liquid phase joint, 11, liquid phase connecting tube Road, 12, flowmeter, 13, LNG storage tank II, 14, LNG pump, 15, LNG compressors, 16, LNG storage tank I, 17, unload liquid pipe road, 18, section Flow valve

Embodiment

The utility model is done with reference to specific embodiment and further illustrated.

Embodiment 1

A kind of LNG loading systems as shown in Fig. 1 to 2, including LNG tank cars (9) and LNG tank area.LNG tank area includes LNG Storage tank I, LNG compressor (15), BOG surge tanks (2), BOG compressors (3), BOG drainers (5), the LNG storages provided with immersed pump Tank II (13), LNG compressors (15) are connected by connecting pipe with the fluid inlet of the LNG storage tank I bottoms, the LNG storages BOG thermostats (1), the BOG thermostats (1) and BOG surge tanks (2) air inlet are connected by gaseous phase outlet at the top of tank I Connection, BOG surge tanks (2) gas outlet is connected by connecting pipe with the BOG compressors (3), the BOG compressors (3) and LNG pump (14), LNG pump (14) the outlet connection BOG are provided with BOG drainers (5) lower end inlet communication, the LNG storage tank I Drainer (5) upper inlet end, the outlet of BOG drainers (5) bottom connects the import of the LNG storage tank II (13), described LNG storage tank II (13) top exit end is connected with the BOG thermostats (1) by pipeline, the outlet of the LNG storage tank II (13) End connects LNG tank cars (9) inlet by liquid phase connecting pipe (11), and LNG tank cars (9) gas phase mouth passes through gas phase connecting tube Road (4) connects the BOG thermostats (1), and be provided with parallel with the liquid pipe is unloaded on liquid pipe road (17), the LNG tank cars (9) Provided with fluid level measuring instrument and pressure detecting table, the fluid level measuring instrument, pressure detecting table are electrically connected with the controller, the control Device also with LNG pump (14), immersed pump, power electric connection.

As a kind of preferred embodiment, between the LNG pump (14) and the BOG drainers (5), the BOG condensations Choke valve (18) and flow regulator are respectively equipped between tank (5) and the LNG storage tank II (13).

As a kind of preferred embodiment, the liquid phase connecting pipe (11) is provided with flowmeter (12) and control valve (6), The liquid pipe road (17) that unloads is provided with control valve II (7), and the information detected according to liquid level detection device controls LNG flow to work as When needing to unload LNG, stop LNG conveying, and the control closed on the liquid phase connecting pipe (11) in parallel with unloading liquid pipe road (17) Valve II (7), opens the control valve I (6) unloaded on liquid pipe road (17), LNG is back in LNG storage tank II (13).

As a kind of preferred embodiment, liquid level detection device is equipped with the LNG storage tank I, LNG storage tank II (13), Liquid level alarm is electrically connected with liquid level detection device, and positioned at the LNG storage tank I, LNG storage tank II (13) surface.

As a kind of preferred embodiment, the liquid phase connecting pipe (11) by oil filling riser liquid phase joint (10) with it is described LNG tank cars (9) inlet is connected, and the gas phase connecting pipe (4) passes through oil filling riser gas phase joint (8) and the LNG tank cars (9) Gas phase mouth is connected.

It is cooled to when it is implemented, LNG will be carried out from ice chest after -162 DEG C, by reducing pressure by regulating flow to 0.015MPa, storage In Pressure Vessel LNG storage tank I, LNG enters BOG drainers (5) by LNG pump (14) from BOG drainers (5) upper inlet end Interior, then BOGBOG thermostats (1) re-heat flashed off in LNG storage tank I to normal temperature enters BOG surge tanks by connecting pipe (2) BOG drainers (5) are delivered to after being pressurized, then through BOG compressors (3), and are entered at BOG drainers (5) bottom inlet, it is complete Paired BOG recovery and recycling, generate LNG；LNG in BOG drainers (5) inputs LNG storage tank II by connecting pipe (13), immersed pump is carried in LNG storage tank II (13)；LNG is directed to entrucking area by liquid phase connecting pipe (11)；During entrucking, Liquid phase connecting pipe (11) is connected by oil filling riser liquid phase joint (10) with LNG tank cars (9) inlet, and gas phase connecting pipe (4) leads to The gas phase mouth that oil filling riser gas phase joint (8) is crossed with LNG tank cars (9) is connected, and starts the LNG conveyings in immersed pump, LNG storage tank II (13) To tank car, the gas phase in LNG tank cars (9) then returns to BOG thermostats (1), LNG storage tank II (13) from gas phase connecting pipe (4) The BOG of interior generation returns to BOG thermostats (1) with connecting pipe, carries out BOG recycling.

Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in scope of the present utility model It is interior above-described embodiment to be changed, changed, replaced and modification.

Claims (6)

1. a kind of LNG loading systems, including LNG tank cars and LNG tank area, it is characterised in that：The LNG tank area includes LNG storage tank I, LNG compressor, BOG surge tanks, BOG compressors, BOG drainers, LNG storage tank II, the LNG storage tank I provided with immersed pump Bottom and top connect LNG compressors and BOG thermostats respectively, and the BOG thermostats, BOG surge tanks, BOG compressors are successively Connection, the BOG compressors are connected with BOG drainers lower end, the LNG pump connection BOG drainer upper inlets end, the LNG Storage tank II sides connect BOG drainers, and opposite side is connected by liquid phase connecting pipe with LNG tank cars, the liquid phase connecting pipe Upper one in parallel is unloaded liquid pipe road, and LNG storage tank II, the LNG tank car is connected by gas phase connecting pipe with BOG thermostats respectively, The LNG tank cars are provided with fluid level measuring instrument and pressure detecting table, and the fluid level measuring instrument, pressure detecting table are electric with controller Connection, the controller is also electrically connected with power supply, LNG pump, immersed pump.

2. a kind of LNG loading systems according to claim 1, it is characterised in that：The LNG storage tank I is holding vessel with pressure And LNG pump is provided with LNG storage tank I.

3. a kind of LNG loading systems according to claim 1, it is characterised in that：Liquid level inspection is equipped with the LNG storage tank Device is surveyed, liquid level alarm is located at the surface of the LNG storage tank and electrically connected with liquid level detection device.

4. a kind of LNG loading systems according to claim 1, it is characterised in that：The liquid phase connecting pipe is provided with stream Gauge and control valve I, unload liquid pipe road provided with control valve II.

5. a kind of LNG loading systems according to claim 1, it is characterised in that：Between the LNG pump and BOG drainers, Choke valve and flow regulator are respectively equipped between the BOG drainers and LNG storage tank II.

6. a kind of LNG loading systems according to claim 1, it is characterised in that：The liquid phase connecting pipe passes through oil filling riser Liquid phase joint is connected with the LNG tank cars inlet, and the gas phase connecting pipe passes through oil filling riser gas phase joint and the LNG tank cars Gas phase mouth connection.