CN203907210U - Novel gasifier for liquified natural gas (LNG) - Google Patents
Novel gasifier for liquified natural gas (LNG) Download PDFInfo
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- CN203907210U CN203907210U CN201420340984.3U CN201420340984U CN203907210U CN 203907210 U CN203907210 U CN 203907210U CN 201420340984 U CN201420340984 U CN 201420340984U CN 203907210 U CN203907210 U CN 203907210U
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- seawater
- lng
- vaporizer
- control valve
- water
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Abstract
The utility model discloses a novel gasifier for liquified natural gas (LNG). The gasifier comprises an evaporator with middle fluid, and a submerged combustion type water heater, wherein the evaporator with the middle fluid is provided with a seawater inlet and a seawater outlet; the submerged combustion type water heater comprises a combustor, and a water trough with an exhaust opening; a smoke distributor communicated with the combustor is arranged in the water trough; exhaust holes are formed in the smoke distributor; a seawater feeding control valve and a seawater draining control valve are respectively arranged at the seawater inlet and the seawater outlet; a water feeding pipeline and a water draining pipeline are arranged on the water trough; the inlet end of the water inlet pipeline is communicated between the seawater draining control valve and the seawater outlet; the draining end of the water draining pipeline is communicated between the seawater feeding control valve and the seawater inlet. Water in the water trough is heated by heat generated by gas combustion; warm water in the water trough supplies heat to the evaporator to heat and gasify the LNG into NG (natural gas). According to the novel gasifier, a conventional gasifying device is simplified, and the investment and the running cost of an LNG receiving station can be lowered.
Description
Technical field
The utility model relates to the vaporizer of a kind of novel liquified natural gas (LNG), particularly can be applicable to the LNG gasification installation of Large LNG receiving station, belongs to LNG gasification technology field.
Background technique
LNG receiving station is generally equipped with base load vaporizer and emergency peak regulation vaporizer, and the effect of vaporizer is the low temperature LNG heating and gasifying of receiving station and is superheated to more than 0 DEG C rock gas (NG), then sends into pipeline and carry out outer defeated.As shown in Figure 1, it comprises base load vaporizer taking seawater as the thermal source submerged combustion vaporizer (SCV) as band intermediate flow build vaporizer (IFV) and rock gas (NG) as fuel heat supply to the system architecture of the LNG gasification installation in the LNG receiving station having in prior art.
The heat source medium of the vaporizer (IFV) with central fluid is generally seawater, and central fluid is generally propane or butane etc., and as shown in Figure 2, it comprises LNG gasification section and NG superheat section to the structure of IFV.LNG gasification section is a kind of shell-and-tube heat exchanger, this shell-and-tube heat exchanger comprises the first housing 1 of a sealing, the interior airtight central fluid 3 of sealing certain liquid level up for safekeeping of the first housing 1, the position that is positioned at central fluid 3 liquid level belows in the first housing 1 has lower tube bank 11, in lower tube bank 11, walk seawater, lower tube bank 11 is immersed in central fluid; The position that is positioned at central fluid 3 liquid level tops in the first housing 1 has upper tube bank 12, in upper tube bank 12, walks LNG.NG superheat section comprises that the second housing 2, the second housings 2 are communicated with the upper tube bank 12 in the first housing 1 by admission line, are provided with the overheated tube bank 21 being communicated with lower tube bank in the second housing 2.IFV is in the time of operation, LNG is passed in the upper tube bank of the first housing, seawater from the superheater tube of NG superheat section intrafascicular flow into LNG gasification section in tube bank, heating of seawater central fluid in lower tube bank makes central fluid evaporation gasification, gas overflowing liquid level arrives upper gaseous phase space and runs into tube bank, at upper tube bank surface condensation releases heat heating LNG, central fluid condensed fluid is got back to bottom liquid pool and is again evaporated by the heating of seawater in lower tube bank under Action of Gravity Field, thereby forms the evaporation of central fluid, the inner loop of condensation; The LNG gasification that has absorbed central fluid heat heats up, and then enters in the second housing of NG superheat section by admission line, and seawater continues to the LNG heat temperature raising having gasified, until temperature reaches production engineering specifications.
The structure of submerged combustion vaporizer (SCV) as shown in Figure 3, it comprises that burner 4 and top have the tank 6 of relief opening 5, in tank 6, there is water bath shampoo, the liquid level below of water bath shampoo is provided with the snakelike tube bank 9 of LNG Liquefied natural gas, the entrance and exit of this snakelike tube bank 9 is arranged on tank outside, in tank 6, be provided with the flue gas distributor 8 being communicated with burner 4, this flue gas distributor 8 is positioned at the position of snakelike tube bank 9 belows, offers exhaust port 7 on flue gas distributor 8.SCV is in the time of operation, after mixing with air, inflammable gas produces high-temperature flue gas through burner combustion, high-temperature flue gas directly enters in tank through the exhaust port of flue gas distributor, water bath shampoo direct contact heat transfer in high-temperature flue gas and tank, again LNG is passed in snakelike tube bank by the entrance of snakelike tube bank, water bath shampoo after heating is by snakelike tube bank and be passed into the LNG heat exchange in snakelike tube bank, the heated NG that is gasificated into of LNG in snakelike tube bank, NG discharges from the outlet of snakelike tube bank after being superheated to the outer defeated temperature of requirement, temperature after final high-temperature flue gas and water bath shampoo heat exchange approaches bath temperature, last waste gas is discharged into the external world by relief opening.
As shown in Figure 1, the LNG gasification installation of prior art gets up the LNG inlet parallel of IFV and SCV by pipe-line system, and on the LNG of IFV and SCV inlet pipeline, valve 10 is set respectively respectively.In the time that ocean temperature is more than 6 ~ 8 DEG C, open the valve on IFV inlet pipeline, close the valve on SCV inlet pipeline, make IFV as base load vaporizer, utilize seawater to carry out heating and gasifying LNG; In the time that winter, ocean temperature was too low, in order to prevent the freezing equipment of seawater icing, close IFV valve IFV is stopped using, open SCV valve, at this moment start SCV as base load vaporizer, the high-temperature flue gas producing by burning combustible gas carrys out heating and gasifying LNG.
Because the IFV of the LNG gasification installation of prior art and SCV have the LNG tube bank of a set of independent operation control separately, the object that enters multi-purpose station pipeline for the rock gas after gasifying, the operation pressure of LNG tube bank is very high, operating temperature is very low, the valve 10 being connected on LNG pipeline need to adopt expensive high pressure low temperature valve, this cause LNG receiving station investment and cost very high.
Summary of the invention
The purpose of this utility model is to provide a kind of vaporizer of the novel liquified natural gas (LNG) that can reduce costs, to solve the investment of LNG receiving station and the high technical problem of cost of prior art.
The utility model adopts following technological scheme: the vaporizer of a kind of novel liquified natural gas (LNG), comprise the vaporizer (a1) with central fluid, this vaporizer with central fluid has seawater entrance, seawer outlet, LNG entrance and NG outlet, the vaporizer of described novel liquified natural gas (LNG) also comprises submerged combustion water heater, described submerged combustion water heater comprises burner and has the tank of relief opening, in tank, be provided with the flue gas distributor being communicated with burner, on flue gas distributor, offer exhaust port, on the second pipe that the first pipeline that described seawater entrance is communicated with and seawer outlet are communicated with, be respectively equipped with seawater and enter control valve and seawater discharge control valve, described tank is provided with intake pipe and outlet conduit, the inlet end of described intake pipe is communicated with the second pipe that seawater is discharged between control valve and seawer outlet, the exhaust end of described outlet conduit and seawater enter the first pipeline communication between control valve and seawater entrance.
The described vaporizer with central fluid comprises upper tube bank and the heat exchanger pipe bundle of lower tube bank, U-shaped structure, in between upper tube bank and lower tube bank, the steam trap that its inner chamber is divided into upper and lower two heat transfer zone is installed, steam trap structure is that corrugated sheet or wire mesh membrane or corrugated sheet add silk screen composite structure form.
Described lower tube bank, upper tube bank and heat exchanger pipe bundle are with the bellows of two-sided strengthened heat transfer structure or conduit pipe or entwining tube or threaded pipe or fin tube or straight fins pipe.
Between described seawater entrance and seawer outlet, be provided with bypass duct.
One end of described bypass duct is communicated with on the first pipeline, the other end is communicated with on intake pipe.
One end near the first pipeline on bypass duct is provided with entrance control valve, and the one end near intake pipe on described bypass duct is provided with discharge control valve.
Described outlet conduit is provided with circulating water pump.
Described intake pipe is provided with water inlet control valve, and described outlet conduit is provided with outlet water control valve.
On described second pipe, on the position between seawer outlet and seawater discharge control valve, be provided with seawater outlet water control valve.
The heat that the utility model produces by gas fuel burning carrys out the water in heating water tank, in the time that winter, ocean temperature was too low, seawater can be entered to control valve and seawater discharges control valve and closes, the now inactive seawater of the vaporizer with central fluid, its thermal source is provided by the warm water in submerged combustion water heater, this warm water flow in the vaporizer with central fluid through intake pipe, warm water flow into again in tank by intake pipe after by LNG absorbing and cooling temperature, and warm water enters into the vaporizer heating and gasifying LNG with central fluid again after heating again.The utility model compared with prior art, the snakelike tube bank of LNG and LNG pipeline control system are not only saved, just do not need to use expensive high pressure low temperature valve, the utility model all uses the vaporizer with central fluid to carry out LNG gasification throughout the year, existing gasification installation is simplified, and therefore the utility model has reduced investment and the cost of LNG receiving station.
Further, in same housing, restrain heating below and makes liquid phase in housing become gas phase, restrain by gas-phase heating and condensation change liquid phase above, gas-liquid separator is set between the two and effectively improves heat exchange efficiency.
Further, in the time of drainage system or emergency episode, can start by-pass line, make the water in the utility model liquified natural gas gasification installation emptying, thereby can improve the safety reliability of device operation.
Further, can utilize circulating water pump by the vaporizer of the warm water conveyor belt central fluid in tank, circulating water pump makes the seawater circulation in submerged combustion water heater of the present utility model easier.
Further, water inlet control valve and outlet water control valve can be controlled respectively the break-make of intake pipe and outlet conduit, in the time that ocean temperature reaches more than 6 ~ 8 DEG C, water inlet control valve, outlet water control valve can be closed, submerged combustion water heater out of service, only carry out heating and gasifying LNG using seawater as thermal source, thereby can reach the effect of energy saving.
Brief description of the drawings
Fig. 1 is the system construction drawing of the LNG gasification installation of prior art;
Fig. 2 is the structural representation of the vaporizer with central fluid in Fig. 1;
Fig. 3 is the structural representation of submerged combustion vaporizer in Fig. 1;
Fig. 4 is a kind of embodiment's of the utility model system construction drawing;
Fig. 5 is the A-A sectional view of Fig. 4;
Fig. 6 is the structural representation of vapor-liquid separator in Fig. 5;
Fig. 7 is the structural representation of vapor-liquid separator in other embodiment of the utility model;
Fig. 8 is the structural representation of vapor-liquid separator in other embodiment of the utility model;
Fig. 9 is the structural representation of vapor-liquid separator in other embodiment of the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
A kind of embodiment's of the utility model system architecture is as shown in Fig. 4 ~ Fig. 5, and the vaporizer of the novel liquified natural gas (LNG) of the present embodiment comprises vaporizer a1 and the submerged combustion water heater a2 with central fluid.Comprise LNG gasification section and NG superheat section with the vaporizer a1 of central fluid.Wherein, LNG gasification section is a kind of shell-and-tube heat exchanger with two heat exchanger pipe bundles, this shell-and-tube heat exchanger comprises the first housing 1 of a sealing, the interior airtight central fluid 3 of sealing certain liquid level up for safekeeping of the first housing 1, central fluid can be the refrigeration agent such as propane or butane, and the position that is positioned at central fluid 3 liquid level belows in the first housing 1 has lower tube bank 11, and one end of lower tube bank 11 has seawater entrance 101, in lower tube bank 11, walk seawater, lower tube bank 11 is immersed in central fluid 3; The position that is positioned at central fluid 3 liquid level tops in the first housing 1 has upper tube bank 12, in upper tube bank 12, walks LNG.NG superheat section comprises the second housing 2, the second housing 2 is communicated with upper tube bank 12 outlets in the first housing by admission line, in the second housing, 2 are provided with the overheated tube bank 21 that one end is communicated with the other end of lower tube bank 11, and the other end of overheated tube bank 21 has seawer outlet 102.Be communicated with respectively the first pipeline 91 and second pipe 92 at seawater entrance 101 and seawer outlet 102 places, on the first pipeline 91 and second pipe 92, be respectively equipped with seawater and enter control valve 103 and seawater discharge control valve 104, on second pipe 92, on the position between seawer outlet 102 and seawater discharge control valve 104, be provided with seawater outlet water control valve 110.The described vaporizer with central fluid comprises upper tube bank and the heat exchanger pipe bundle of lower tube bank, U-shaped structure, in between upper tube bank and lower tube bank, the steam trap 33 that its inner chamber is divided into upper and lower two heat transfer zone is installed, the steam trap of the present embodiment adopts the butterfly plate that is suppressed with emboss pit as shown in Figure 6, when use, can on emboss pit, offer aperture, thereby be conducive to improve heat exchange efficiency.
Submerged combustion water heater a2 comprises burner 41 and has the tank 61 of relief opening 51, in tank 61, be provided with the flue gas distributor 81 being communicated with the firing chamber of burner 41, on flue gas distributor 81, offer exhaust port 71, tank 61 is provided with intake pipe 105 and outlet conduit 106, the inlet end of described intake pipe 105 is communicated with on seawater is discharged between control valve 104 and seawer outlet the second pipeline 92 of 102, and the exhaust end of described outlet conduit 106 is communicated with and enters on the first pipeline 91 between control valve 103 and seawater entrance 101 at seawater.Outlet conduit 106 is provided with circulating water pump 100, and intake pipe 105 is provided with water inlet control valve 107, and outlet conduit 106 is provided with outlet water control valve 108.
The present embodiment is provided with bypass duct 13 between seawater entrance 101 and seawer outlet 102, one end of this bypass duct 13 is communicated with on the first pipeline 91, the other end is communicated with on intake pipe 105, one end near the first pipeline 91 on bypass duct 13 is provided with entrance control valve 109, and bypass duct 13 is provided with discharge control valve 111 near one end of intake pipe 105.In the time of drainage system or emergency episode, entrance control valve 109 can be opened and discharge control valve 111 starts by-pass line 13, thereby the safety reliability of device operation can be improved.
When the utility model uses under ocean temperature is greater than the condition of 6 ~ 8 DEG C, seawater is entered to control valve and seawater discharges control valve and opens, water inlet control valve and outlet water control valve are closed, now just do not use submerged combustion water heater, only use the vaporizer with central fluid to carry out heating and gasifying LNG.In the time of operation, LNG is passed in the upper tube bank of the first housing, seawater from the superheater tube of NG superheat section intrafascicular by header flow into LNG gasification section in tube bank, heating of seawater central fluid in lower tube bank makes central fluid evaporation gasification, the steam of central fluid overflows liquid level arrival upper gaseous phase space and runs into tube bank, at upper tube bank surface condensation releases heat heating LNG, central fluid condensed fluid is got back to bottom liquid pool and is again evaporated by the heating of seawater in lower tube bank under Action of Gravity Field, thereby forms the evaporation of central fluid, the inner loop of condensation; The LNG gasification that has absorbed central fluid heat heats up, and then enters in the second housing of NG superheat section by admission line, and the intrafascicular seawater of superheater tube continues the LNG heat temperature raising having gasified, and finally obtains temperature and reach the NG of production engineering specifications.
When the utility model uses under the too low condition of ocean temperature in the winter time, for example, when ocean temperature is lower than 7 DEG C, close seawater and enter control valve and seawater discharge control valve, the now inactive seawater thermal source of the vaporizer with central fluid, then starting submerged combustion water heater starts working it, after mixing with air, inflammable gas produces high-temperature flue gas through burner combustion, high-temperature flue gas directly enters in tank through the exhaust port of flue gas distributor, water direct contact heat-exchanging in high-temperature flue gas and tank, in the time that the water in tank is heated to 7 ~ 35 DEG C, open water inlet control valve and outlet water control valve, start circulating water pump the circulating water of 7 ~ 35 DEG C is provided to vaporizer, now the thermal source of the vaporizer with central fluid is provided by the warm water in submerged combustion water heater, vaporizer utilizes the warm water heating and gasifying LNG in tank, warm water flow into again in tank by intake pipe after by LNG absorbing and cooling temperature, warm water enters into the vaporizer heating and gasifying LNG with central fluid again after heating again, final waste gas is discharged by the relief opening on tank.
The utility model compared with prior art, the snakelike tube bank of LNG and LNG pipeline control system are not only saved, and all can use the vaporizer with central fluid to carry out LNG gasification throughout the year, existing gasification installation is simplified, and therefore the utility model has reduced investment and the cost of LNG receiving station.
In the specific implementation, lower tube bank, upper tube bank and heat exchanger pipe bundle can adopt with the bellows of two-sided strengthened heat transfer structure or conduit pipe or entwining tube or threaded pipe or fin tube or straight fins pipe the utility model.
Above-described embodiment is a kind of preferred embodiment of the utility model, and by-pass line is not necessary for the utility model, therefore, in other embodiment of the present utility model, can save by-pass line.
In other embodiment of the present utility model, steam trap also can adopt slab construction as shown in Figure 7, evenly offers aperture on this flat board; Moisture separator can also adopt corrugated board structures as shown in Figure 8 or screen net structure as shown in Figure 9.
Although mode of execution of the present utility model be have been described in detail above, the utility model is not limited to above-mentioned mode of execution, and the scope of the present utility model that appended claim limits comprises all substituting and changing of being equal to.
Claims (9)
1. the vaporizer of a novel liquified natural gas (LNG), comprise the vaporizer (a1) with central fluid, this vaporizer with central fluid has seawater entrance (101), seawer outlet (102), LNG entrance and NG outlet, it is characterized in that: the vaporizer of described novel liquified natural gas (LNG) also comprises submerged combustion water heater (a2), described submerged combustion water heater (a2) comprises burner (41) and has the tank (61) of relief opening (51), in tank (61), be provided with the flue gas distributor (81) being communicated with burner (41), on flue gas distributor (81), offer exhaust port (71), on the second pipe (92) that the first pipeline (91) that described seawater entrance (101) is communicated with and seawer outlet (102) are communicated with, be respectively equipped with seawater and enter control valve (103) and seawater discharge control valve (104), described tank (61) is provided with intake pipe (105) and outlet conduit (106), the inlet end of described intake pipe (105) is communicated with the second pipe (92) that seawater is discharged between control valve (104) and seawer outlet (102), the exhaust end of described outlet conduit (106) is communicated with the first pipeline (91) that seawater enters between control valve (103) and seawater entrance (101).
2. the vaporizer of the novel liquified natural gas of one according to claim 1 (LNG), it is characterized in that: the described vaporizer (a1) with central fluid comprises upper tube bank (12) and the heat exchanger pipe bundle (21) of lower tube bank (11), U-shaped structure, the steam trap (33) that its inner chamber is divided into upper and lower two heat transfer zone is installed between upper tube bank (12) and lower tube bank (11), and steam trap (33) structure is that corrugated sheet or wire mesh membrane or corrugated sheet add silk screen composite structure form.
3. the vaporizer of the novel liquified natural gas of one according to claim 2 (LNG), is characterized in that: described lower tube bank (11), upper tube bank (12) and heat exchanger pipe bundle (21) are bellows or conduit pipe or entwining tube or threaded pipe or fin tube or straight fins pipe with two-sided strengthened heat transfer structure.
4. the vaporizer of the novel liquified natural gas of one according to claim 1 (LNG), is characterized in that: between described seawater entrance (101) and seawer outlet (102), be provided with bypass duct (13).
5. the vaporizer of the novel liquified natural gas of one according to claim 4 (LNG), is characterized in that: one end of described bypass duct (13) is communicated with on the first pipeline (91), the other end is communicated with on intake pipe (105).
6. the vaporizer of the novel liquified natural gas of one according to claim 5 (LNG), it is characterized in that: the upper one end near the first pipeline (91) of bypass duct (13) is provided with entrance control valve (109), the upper one end near intake pipe (105) of described bypass duct (13) is provided with discharge control valve (111).
7. according to the vaporizer of the novel liquified natural gas of one (LNG) described in claim 1 ~ 6 any one, it is characterized in that: described outlet conduit (106) is provided with circulating water pump (100).
8. according to the vaporizer of the novel liquified natural gas of one (LNG) described in claim 1 ~ 6 any one, it is characterized in that: described intake pipe (105) is provided with water inlet control valve (107), described outlet conduit (106) is provided with outlet water control valve (108).
9. according to the vaporizer of the novel liquified natural gas of one (LNG) described in claim 1 ~ 6 any one, it is characterized in that: the position being positioned on described second pipe (92) between seawer outlet (102) and seawater discharge control valve (104) is provided with seawater outlet water control valve (110).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420340984.3U CN203907210U (en) | 2014-06-25 | 2014-06-25 | Novel gasifier for liquified natural gas (LNG) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420340984.3U CN203907210U (en) | 2014-06-25 | 2014-06-25 | Novel gasifier for liquified natural gas (LNG) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203907210U true CN203907210U (en) | 2014-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420340984.3U Withdrawn - After Issue CN203907210U (en) | 2014-06-25 | 2014-06-25 | Novel gasifier for liquified natural gas (LNG) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203907210U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048161A (en) * | 2014-06-25 | 2014-09-17 | 江苏中圣高科技产业有限公司 | United gasification device of liquified natural gas (LNG) |
| CN104964157A (en) * | 2015-07-09 | 2015-10-07 | 江苏中圣高科技产业有限公司 | Method and device for improving liquefied natural gas gasification energy-saving efficiency |
-
2014
- 2014-06-25 CN CN201420340984.3U patent/CN203907210U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048161A (en) * | 2014-06-25 | 2014-09-17 | 江苏中圣高科技产业有限公司 | United gasification device of liquified natural gas (LNG) |
| CN104048161B (en) * | 2014-06-25 | 2016-10-26 | 江苏中圣高科技产业有限公司 | A kind of combined vaporizing device of liquified natural gas (LNG) |
| CN104964157A (en) * | 2015-07-09 | 2015-10-07 | 江苏中圣高科技产业有限公司 | Method and device for improving liquefied natural gas gasification energy-saving efficiency |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141029 Effective date of abandoning: 20161012 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |