CN208254280U - A kind of LNG central fluid vaporizer - Google Patents

Abstract

The utility model relates to a kind of LNG central fluid vaporizers, mainly it is made of LNG preheating device and LNG heat-exchanger rig, LNG preheating device includes LNG baffle-box, the first cushion chamber and the second cushion chamber are equipped in LNG baffle-box, the input terminal and output end of first cushion chamber are separately connected LNG input pipe and LNG preheating heat exchanger, the input terminal and output end of second cushion chamber are separately connected the LNG input terminal of LNG preheating heat exchanger and LNG heat-exchanger rig, in the A1 of LNG heat-exchanger rig sea water passage, titanium is served as a contrast on A2 and A3 and flange sealing surface, greatly improve the service life of seawater side, user is simplified to the maintenance cost of sea water passage.

Description

A kind of LNG central fluid vaporizer

Technical field

The utility model relates to a kind of vaporizer, especially a kind of heating seawater flows through shell using carbon steel liner titanium plate LNG central fluid vaporizer, belongs to carburettor technology field.

Background technique

LNG central fluid vaporizer is the liquefied natural gas seawater vaporizer being currently mainly used, the seawater as heat source Flow through seawater-LNG heat exchanging segment and intermediate heat transfer-seawater to make heat exchange section, in flow process respectively with the natural gas in vaporizer Vaporizer is flowed out with after central fluid heat exchange.Previous sea water passage is using the coating for applying anti-seawater corrosion, since coating hardness is high, It is easy to break paint film in installation, makes coating failure.And contain silt in seawater, with the continuous increasing for using the time Add, paint layer can be because of the corrosion-resistant failure of coating caused by being worn；Worse in use, once coating failure, from setting Standby outside can not be found, be easy to cause the catastrophic failure of entire sea water passage equipment.

Utility model content

The purpose of this utility model is that: in view of the above-mentioned problems of the prior art, proposing that one kind can either meet vapour Change the LNG central fluid vaporizer that device casing rigidity requires, can extend service life of equipment again.

In order to reach the goals above, a kind of LNG central fluid vaporizer provided by the utility model, including sea intake pipe Case (A1), the sea intake bobbin carriage is connected to by the tube side of LNG heat-exchanger rig (E3) with the first seawater cushion chamber (A2), described First seawater cushion chamber is connected by the tube side of the second seawater heat exchanger (E1) with seawer outlet bobbin carriage (A3), and it is logical to form liquid Road；

It is connected to above the shell side of second seawater heat exchanger with the shell side of LNG preheating heat exchanger (E2), the LNG preheating The LNG import of heat exchanger, which is connected to by its tube side and exterior line with the shell side of LNG heat-exchanger rig (E3), is followed by the outlet NG, is formed Vaporize channel；

The shell of sea intake bobbin carriage, the first seawater cushion chamber, seawer outlet bobbin carriage in the fluid passage and corresponding The flange sealing surface of bobbin carriage is the two-layer composite of external carbon steel layer and titanium plate liner layer composition；On each composite construction It is equipped at least one detection mouth whether leaked to monitor seawater.

On all sea water passages, base is carbon steel, and to reach the pressure for bearing sea water pump, liner titanium, reaching is prevented The purpose of seawater corrosion.On each section apparatus flange sealing surface of sea water passage, using lining titanium structure, corruption of the seawater to flange is prevented Erosion.

The preferred embodiment of the utility model is: the detection mouth vertical welding runs through carbon steel layer in external carbon steel layer； The detection mouth uses internal thread structure, conducive to the maintenance and maintenance of central fluid vaporizer devices.

Further, between the titanium plate liner layer and carbon steel base layer be explosion cladding structure or inner lining structure, component it Between titanium plate liner layer stacking connection is carried out using welding manner.

It further, is titanium alloy tube with the heat exchanger tube of contact with sea water.

Further, flange face and simple steel flange enter aqueous medium in order to prevent, cause to corrode, in end to lining titanium and carbon The faying face of steel flange carries out soldering and sealing.

Further, second seawater heat exchanger and LNG preheating heat exchanger are placed in LNG preheating cabinet, wherein described Second seawater heat exchanger is immersed in the liquid refrigerant of LNG preheating cabinet, in second seawater heat exchanger and LNG preheating heat exchanger Between be separated with stiffener plate, the reinforcing rib is detachably mounted on the side wall of LNG preheating cabinet.In the second seawater heat exchanger and Be separated with stiffener plate between LNG preheating heat exchanger, increase stiffener plate structure avoid shell stress it is excessive caused by change Shape, improves the stability of LNG central fluid vaporizer, at the same can to avoid heat exchanger gusset welding temperature it is excessively high caused by Titanium oxidation.

A kind of LNG central fluid vaporizer provided by the utility model, the former impingement plate structure of LNG heat-exchanger rig are improved to Titanium structure is served as a contrast, the service life of LNG heat-exchanger rig is effectively increased, reduces the maintenance cost of user, improve heat exchanger Service life, theoretically, as long as liner does not damage, service life endless；Leak detection is increased in lining titanium structure simultaneously Hole, once there is liner rupture, detection hole will appear liquid, thus can know whether liner leakage occurs as early as possible.It avoids Liner causes the excessive corrosion of carbon steel base layer because cracked, so that extend LNG central fluid vaporizer uses the longevity Life.

Detailed description of the invention

The utility model will be further described below with reference to the accompanying drawings.

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

Fig. 2 is the first seawater cushion chamber structural schematic diagram in Fig. 1.

Fig. 3 is leak hunting aperture structure chart in Fig. 2.

Fig. 4 is that flange serves as a contrast titanium figure in Fig. 2.

Specific embodiment

The specific embodiment that present invention will be described in detail with reference to the accompanying, embodiment that but it is not limited to this are all using equivalent The technical solution that replacement or equivalent transformation are formed, should all cover within the protection scope of the present utility model.

As shown in Figure 1, a kind of LNG central fluid vaporizer provided in this embodiment, including sea intake bobbin carriage (A1), institute It states sea intake bobbin carriage to be connected to by the tube side of LNG heat-exchanger rig (E3) with the first seawater cushion chamber (A2), first seawater Cushion chamber is connected by the tube side of the second seawater heat exchanger (E1) with seawer outlet bobbin carriage (A3), and fluid passage is formed；Described Be connected to above the shell sides of two seawater heat exchangers with the shell side of LNG preheating heat exchanger (E2), the LNG of the LNG preheating heat exchanger into Mouth, which is connected to by its tube side and exterior line with the shell side of LNG heat-exchanger rig (E3), is followed by the outlet NG, forms vaporization channel；It is described The flange of sea intake bobbin carriage, the first seawater cushion chamber, the shell of seawer outlet bobbin carriage and corresponding bobbin carriage in fluid passage is close Cover is the two-layer composite of external carbon steel layer and titanium plate liner layer composition；At least one is equipped on each composite construction A detection mouth whether leaked to monitor seawater.

The heat exchanger that first seawater heat exchanger S1 and the second seawater heat exchanger E1 are used is tubular heat exchanger, LNG preheating Heat exchanger E2 is U-tube heat exchanger；First seawater heat exchanger S1 is located in LNG heat-exchanger rig E3, the second seawater heat exchanger E1 and LNG preheating heat exchanger E2 is located in LNG preheating cabinet S2；It, can be in LNG preheating cabinet S2 freely filled with working medium in LNG preheating cabinet S2 Liquefaction and vaporization, liquid refrigerant are located at the seawater to make heat exchange in LNG preheating cabinet S2 space bottom and the second seawater heat exchanger E1, liquid Working medium heating becomes gaseous working medium, and gaseous working medium rises to the liquid in the space the preheating cabinet S2 top LNG and LNG preheating heat exchanger E2 State natural gas LNG heat exchange；Heat source seawater A1 is connected with LNG heat-exchanger rig E3 arrival end；First seawater cushion chamber A2 arrival end with The outlet end heat-exchanger rig E3 LNG is connected, and outlet end is connected with LNG preheating cabinet S2 arrival end；Heat source seawater A1 enters the first seawater Heat exchanger S1 heats its external LNG natural gas, enters the second seawater in LNG preheating cabinet S2 by the first seawater cushion chamber A2 and changes Hot device E1 heats liquid refrigerant, then flows into water and discharges pond；Liquefied natural gas LNG passes through LNG input pipe from the first LNG cushion chamber Exchange heat into LNG preheating heat exchanger E2 and gaseous working medium, after from the 2nd LNG cushion chamber through pipeline enter LNG heat-exchanger rig E3 with Seawater to make heat exchange in first seawater heat exchanger S1 is then out LNG central fluid vaporizer.

The outlet(discharge) flange of the seawater input terminal of LNG heat-exchanger rig A1, the shape of a hoof header of A2 and seawater is all made of lining titanium knot Structure, as shown in Fig. 2, the anticorrosion layer of all sea water passages is titanium, pressure-bearing is carbon steel, and lining titanium structure is used compared with coating and glass reinforced plastic Longer life expectancy, the resistance to seawater scouring containing silt；Furthermore, it is possible to find whether lining titanium has leakage at any time by leak hunting aperture.

In addition to the implementation, the utility model can also have other embodiments.It is all to use equivalent replacement or equivalent change The technical solution to be formed is changed, the protection scope of the requires of the utility model is all fallen within.

Claims (7)

1. a kind of LNG central fluid vaporizer, including sea intake bobbin carriage (A1), it is characterised in that: the sea intake bobbin carriage It is connected to by the tube side of LNG heat-exchanger rig (E3) with the first seawater cushion chamber (A2), the first seawater cushion chamber passes through second The tube side of seawater heat exchanger (E1) is connected with seawer outlet bobbin carriage (A3), forms fluid passage；

It is connected to above the shell side of second seawater heat exchanger with the shell side of LNG preheating heat exchanger (E2), the LNG pre-heating heat-exchanging The LNG import of device, which is connected to by its tube side and exterior line with the shell side of LNG heat-exchanger rig (E3), is followed by the outlet NG, forms vaporization Channel；

The shell and corresponding bobbin carriage of sea intake bobbin carriage, the first seawater cushion chamber, seawer outlet bobbin carriage in the fluid passage Flange sealing surface be external carbon steel layer and titanium plate liner layer composition two-layer composite；It is all provided on each composite construction The detection mouth for thering is at least one whether to leak to monitor seawater.

2. LNG central fluid vaporizer according to claim 1, it is characterised in that: the detection mouth vertical welding is in outer In portion's carbon steel layer, and run through carbon steel layer；The detection mouth is to use interior spiral shell convenient for inspection operation when device fabrication and in use Line structure.

3. LNG central fluid vaporizer according to claim 1, it is characterised in that: the titanium plate liner layer and carbon steel base It is explosion cladding structure or inner lining structure between layer, the titanium plate liner layer between component carries out stacking connection using welding manner.

4. LNG central fluid vaporizer according to claim 1, it is characterised in that: the heat exchanger tube with contact with sea water is titanium Compo pipe.

5. LNG central fluid vaporizer according to claim 1, it is characterised in that: the bilayer of the flange sealing surface is multiple The faying face and carbon steel base layer for closing structure are fixed using soldering and sealing.

6. LNG central fluid vaporizer according to claim 1, it is characterised in that: second seawater heat exchanger and LNG Preheating heat exchanger is placed in LNG preheating cabinet, wherein second seawater heat exchanger is immersed in the liquid refrigerant of LNG preheating cabinet In, stiffener plate is separated between second seawater heat exchanger and LNG preheating heat exchanger.

7. LNG central fluid vaporizer according to claim 6, it is characterised in that: the reinforcing rib is removably fixed On the side wall of LNG preheating cabinet.