CN207245887U - Low-pressure fuel gas double-wall pipe ventilating system - Google Patents
Low-pressure fuel gas double-wall pipe ventilating system Download PDFInfo
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- CN207245887U CN207245887U CN201720945078.XU CN201720945078U CN207245887U CN 207245887 U CN207245887 U CN 207245887U CN 201720945078 U CN201720945078 U CN 201720945078U CN 207245887 U CN207245887 U CN 207245887U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The utility model provides a kind of low-pressure fuel gas double-wall pipe ventilating system, including two or more mutually independent double-wall pipe ventilation subsystems, each double-wall pipe ventilation subsystem includes gas burning system and air inlet system, gas burning system includes gas inlet, combustion gas gas returning port and combustion gas valve group, air inlet system includes the first perflation ventilation case and the second perflation ventilation case, first perflation ventilation case is connected by the first double-wall pipe with combustion gas valve group, and combustion gas valve group is connected by the second double-wall pipe with dual fuel engine；Combustion gas gas returning port is connected by the 3rd double-wall pipe with dual fuel engine, and the 3rd double-wall pipe includes the 3rd outer tube and the 3rd inner tube, and combustion gas gas returning port is connected with the 3rd inner tube, and the 3rd outer tube is connected by blast pipe with the second perflation ventilation case；The air outlet of combustion gas valve group is connected by ventilation duct with exhausting system.Using low-pressure fuel gas double-wall pipe ventilating system, it is capable of the vent air amount of each dual fuel engine double-wall pipe of reasonable layout, ensures the normal operation of dual fuel engine.
Description
Technical field
A kind of low-pressure fuel gas double-wall pipe ventilating system is the utility model is related to, applies to two more particularly to one kind
A kind of low-pressure fuel gas double-wall pipe ventilating system of even more ship dual fuel engine gaseous fuel supply pipings of platform.
Background technology
With the pressure that world environments is protected, NOx emission standard technique rule is repaiied by International Maritime Organization (IMO)
Just, the requirement of its discharge of the diesel engine installed on date specified in Xin ECA areas amendment and the ship built later should
Reach the standard of Tier III discharges.
In order to meet the requirement of Tier III NOx emissions standard, liquefied natural gas (LNG) has thus been driven as the double of power
The fast development of fuel engine of boat and ship, because relative to traditional energy, liquefied natural gas, which has, saves fuel cost, discharge
Low, low pressure dual fuel engine is in the case where being not required any emission treatment with regard to that can meet Tier III NOx emission standards.
Dual fuel engine research is also therefore as an important development direction of engine of boat and ship technology.But dual fuel engine
, must be using double with reference to the gas supply pipe in IGC standard machines place using also to consider the inflammable and explosive characteristic of combustion gas
Wall pipe pipeline form, to reduce the possibility that engine compartment produces explosion, the annular space planted agent arrangement of double-wall pipe inner and outer pipes
It is connected for ventilating system with exterior negative pressure mechanical ventilation equipment, the draught capacity of the ventilating system is at least takes a breath 30 per hour
It is secondary.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of low-pressure fuel gas double-wall pipe ventilating system, for two very
At most the double-wall pipe inner tube gas leakage of platform dual fuel engine when, exhaust fan can be forced to discharge combustion gas, so as to reduce combustion
Gas disclosure risk.
To achieve the above object, the utility model provides a kind of low-pressure fuel gas double-wall pipe ventilating system, including two or more
A mutually independent double-wall pipe ventilation subsystem, each double-wall pipe ventilation subsystem include gas burning system and are located in engine room casing
Air inlet system, the gas burning system include gas inlet, combustion gas gas returning port and combustion gas valve group, and the air inlet system includes first
Perflation ventilation case and the second perflation ventilation case, the first perflation ventilation case are connected by the first double-wall pipe with combustion gas valve group, institute
State combustion gas valve group to be connected with dual fuel engine by the second double-wall pipe, first double-wall pipe is included in the first outer tube and first
Pipe, the gas inlet are connected with first inner tube；The combustion gas gas returning port is started by the 3rd double-wall pipe with double fuel
Machine connects, and the 3rd double-wall pipe includes the 3rd outer tube and the 3rd inner tube, and the combustion gas gas returning port is connected with the 3rd inner tube,
3rd outer tube is connected by blast pipe with the second perflation ventilation case；The air outlet of the combustion gas valve group passes through ventilation duct
It is connected with exhausting system.
Preferably, the air inlet of the first perflation ventilation case is equipped with the first air-inlet grille, the second perflation ventilation case
Air inlet be equipped with the second air-inlet grille.
Preferably, the position on first outer tube close to air inlet is equipped with the first air flow proving switch, the blast pipe
The upper position close to air inlet is equipped with the second air flow proving switch.
Preferably, the air inlet of first outer tube is equipped with the first adjustable orifice plate, the air inlet of the blast pipe
Place is equipped with the second adjustable orifice plate.
Preferably, the exhausting system includes plenum chamber and at least one exhaust fan, the plenum chamber and the ventilation duct
Air outlet connection, each exhaust fan is connected with the plenum chamber.
Preferably, the draft outlet of each exhaust fan is covered with flame screen.
Preferably, the exhaust fan is equipped with two, and each exhaust fan is equipped with the air pipeline that the plenum chamber is connected
Check-valves and butterfly valve.
Preferably, the ventilation duct is equipped with pressure gauge.
Preferably, the ventilation duct is equipped with combustible gas detecting device.
As described above, the low-pressure fuel gas double-wall pipe ventilating system that the utility model is related to, has the advantages that：Using
Low-pressure fuel gas double-wall pipe ventilating system, is capable of the vent air amount of each dual fuel engine double-wall pipe of reasonable layout, ensures
The normal operation of dual fuel engine.
Brief description of the drawings
Fig. 1 is the system diagram of the utility model low-pressure fuel gas double-wall pipe ventilating system.
Fig. 2 is the system diagram of double-wall pipe ventilation subsystem in Fig. 1.
Fig. 3 is the enlarged drawing at A in Fig. 2.
Component label instructions
1 double-wall pipe ventilation subsystem
11 engine room casings
2 gas burning systems
21 gas inlets
22 combustion gas gas returning ports
23 combustion gas valve groups
24 first double-wall pipes
241 first outer tubes
242 first inner tubes
25 second double-wall pipes
251 second outer tubes
252 second inner tubes
26 dual fuel engines
27 the 3rd double-wall pipes
271 the 3rd outer tubes
272 the 3rd inner tubes
28 first air flow proving switch
3 air inlet systems
31 first perflation ventilation casees
311 first air-inlet grilles
32 second perflation ventilation casees
321 second air-inlet grilles
33 blast pipes
34 second air flow proving switch
35 first adjustable orifice plates
36 second adjustable orifice plates
4 exhausting systems
41 ventilation ducts
42 plenum chambers
43 exhaust fans
44 flame screens
45 check-valves
46 butterfly valves
47 pressure gauges
48 combustible gas detecting devices
Embodiment
Illustrate the embodiment of the utility model by particular specific embodiment below, those skilled in the art can be by this
Content disclosed by specification understands other advantages and effect of the utility model easily.
It should be clear that structure, ratio, size depicted in this specification institute accompanying drawings etc., only coordinating specification to be taken off
The content shown, so that those skilled in the art understands and reads, is not limited to the enforceable restriction bar of the utility model
Part, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size, are not influencing
Under the effect of the utility model can be generated and the purpose that can reach, should all still it fall in the revealed technology of the utility model
In the range of Rong get Neng is covered.Meanwhile cited such as " on ", " under ", "left", "right", the use of " centre " in this specification
Language, be merely convenient to narration understand, and be not used to limit the enforceable scope of the utility model, the change of its relativeness or
Adjustment, in the case where changing technology contents without essence, when being also considered as the enforceable category of the utility model.
As shown in Figure 1 to Figure 3, the utility model provides a kind of low-pressure fuel gas double-wall pipe ventilating system, including two or more
A mutually independent double-wall pipe ventilation subsystem 1, the quantity of double-wall pipe ventilation subsystem 1 is according to the quantity of dual fuel engine 26
Determine, each double-wall pipe ventilation subsystem 1 correspond to a dual fuel engine 26.
As shown in Figure 1 to Figure 3, each double-wall pipe ventilation subsystem 1 includes gas burning system 2, air inlet system 3 and exhausting system
4, air inlet system 3 is set in engine room casing 11 above deck.
As shown in Figure 1 to Figure 3, the gas burning system 2 includes gas inlet 21, combustion gas gas returning port 22 and combustion gas valve group
23, wherein gas inlet 21 and combustion gas gas returning port 22 must be necessarily arranged on deck, and the air inlet system 3 leads to including the first air inlet
31 and second perflation ventilation case 32 of bellows, the first perflation ventilation case 31 are connected by the first double-wall pipe 24 with combustion gas valve group 23
Connect, the combustion gas valve group 23 is connected by the second double-wall pipe 25 with dual fuel engine 26, and first double-wall pipe 24 includes the
One outer tube 241 and the first inner tube 242, second double-wall pipe 25 include the second outer tube 251 and the second inner tube 252, the combustion gas
Air inlet 21 is connected with first inner tube 242；The combustion gas gas returning port 22 passes through the 3rd double-wall pipe 27 and dual fuel engine
26 connections, the 3rd double-wall pipe 27 include the 3rd outer tube 271 and the 3rd inner tube 272, the combustion gas gas returning port 22 and described the
Three inner tubes 272 connect, and the 3rd outer tube 271 is connected by blast pipe 33 with the second perflation ventilation case 32；The combustion gas
The air outlet of valve group 23 is connected by ventilation duct 41 with exhausting system 4.Inside the dual fuel engine 26 and combustion gas valve group 23
With double-wall pipe, it is integrated in inside machine, in machine inlet and outlet and the first double-wall pipe 24, the second double-wall pipe 25 and the 3rd double-wall pipe
27 weld together.All air pipelines and gas fuel pipe that the utility model is related to, pipe joint should try one's best less, and should
Take complete penetraction and fusion in welding butt welding.
Combustion gas enters from gas inlet 21 in the utility model, successively by the first inner tube 242, combustion gas valve group 23 and
After two inner tubes 252, after entering dual fuel engine 26 by the gas inlet interface of dual fuel engine 26, start from double fuel
The combustion gas return-air interface outflow of machine 26, by the 3rd inner tube 272 from 22 return-air of combustion gas gas returning port.Air inlet system 3 include two-way into
Air pipe line, wherein entering the first perflation ventilation case 31 all the way, after the first outer tube 241, into combustion gas valve group 23, passes through combustion gas
The air outlet of valve group 23 enters exhausting system 4；In addition the second perflation ventilation case 32 is entered all the way, successively by blast pipe 33 and
Enter dual fuel engine 26 after three outer tubes 271, after the air outlet of dual fuel engine 26 flows into the second outer tube 251, enter
Combustion gas valve group 23, enters exhausting system 4 by the air outlet of combustion gas valve group 23, is finally discharged from the draft outlet of exhausting system 4,
Low-pressure fuel gas double-wall pipe ventilating system air circulation is kept, ventilation is unimpeded.
As shown in Figure 1 to Figure 3, it is preferable that the air inlet of the first perflation ventilation case 31 is equipped with the first air-inlet grille
311, the air inlet of the second perflation ventilation case 32 is equipped with the second air-inlet grille 321.First air-inlet grille 311 and the second inlet air
Grid 321 is made of steel construction, and incoming air area is adjustable, and has the function that air inlet and reduce air drag, is also prevented from rainwater
Into.First perflation ventilation case 31 and the second perflation ventilation case 32 are welded by steel plate, are welded on the bulkhead of engine room casing 11,
The import of every ventilation duct is kept apart, prevents from tacking, improves drafting efficiency and quality.
As shown in Figure 1 to Figure 3, it is preferable that the position on first outer tube 241 close to air inlet is equipped with the first air stream
Amount switch 28, the position on the blast pipe 32 close to air inlet is equipped with the second air flow proving switch 34, and the first air mass flow is opened
Control system of 28 and second air flow proving switch 34 of pass respectively with dual fuel engine 26 is connected, for monitoring air flow
It whether there is, and feed back in the control system of dual fuel engine 26.
As shown in Figure 1 to Figure 3, it is preferable that the air inlet of first outer tube 241 is equipped with the first adjustable orifice plate
35, the air inlet of the blast pipe 32 is equipped with the second adjustable orifice plate 36, and the first adjustable orifice plate 35 and second is adjustable
Restricting orifice 36 makes the flow velocity of all ventilation ducts be not much different, and keeps energy balance.First adjustable orifice plate 35 and second can
Control system of the restricting orifice 36 respectively with dual fuel engine 26 is adjusted to be connected, when low-pressure fuel gas double-wall pipe ventilating system is normally transported
During row, the flow velocity of each ventilation duct is measured close to each ventilation duct import with airspeedometer, when flow velocity difference is larger, first can be passed through
35 and second adjustable orifice plate 36 of adjustable orifice plate is adjusted, and is finally reached every ventilation outer tube flow velocity and is not much different.
Preferably, the exhausting system 4 includes plenum chamber 42 and at least one exhaust fan 43, the plenum chamber 42 with it is described
The air outlet connection of ventilation duct 41, each exhaust fan 43 are connected with the plenum chamber 42.Exhaust fan 43 is usually arranged as two, takes out
Wind turbine 43 is evacuated whole double-wall pipe outer tube and is discharged into outdoor safety position, and ensure rate of ventilation at least 30 times/small
When, the exhaust fan 43 is arranged in the position of a safety, the ventilation inlet of the exhausting system 4 and exhaust, should be respectively from
With row to the position of a safety.The air inlet of the exhausting system 4 should be away from exhaust outlet, to reduce suction fuel gas as far as possible
Or the danger of Mars, and a dangerous enclosed spaces is built up in the draft outlet region that wind turbine is formed, and is separated with other regions.Two
A exhaust fan 43 is electric exhaust fan, and is controlled by the control system of dual fuel engine 26, both are spare each other, often
A exhaust fan 43 all should have enough draught capacitys to provide ventilation power for whole ventilating system, if required ventilation energy
Power is lost, and the sense of hearing and visual alarm should be sent in permanent someone position on duty.When exhaust fan 43 works, whole double-walled Gas Pipe
Outer tube ventilation pressure subatmospheric.The plenum chamber 42 is connected with the air outlet of the ventilation duct 41, each exhaust fan 43
It is connected with the plenum chamber 31, the plenum chamber 31 has the dynamic pressure for reducing combustion gas double-wall pipe ventilating system, increase static pressure, stabilization
Air-flow and the effect for reducing airstream vibration, and can effectively prevent and weaken noise, it can make ventilating system effect more
Add ideal.
Preferably, the draft outlet of each exhaust fan 43 is covered with flame screen 44, avoids the danger of Mars.Preferably, it is described
Exhaust fan 43 is equipped with two, and the air pipeline that each exhaust fan 43 is connected with the plenum chamber 42 is equipped with check-valves 45 and butterfly valve
46, before check-valves 45 should be installed on the air inlet of exhaust fan 43, when being evacuated in order to prevent, generation pair when two exhaust fans 43 are run
Inhale.Preferably, the ventilation duct 41 is equipped with pressure gauge 47, measures the air pressure in ventilation duct 41.
Preferably, the ventilation duct 41 is equipped with combustible gas detecting device 48, the combustible gas detecting device 48 with
The control system connection of dual fuel engine 26.The combustible gas detecting device 48 is used for the hair for detecting double-wall pipe gas leakage
It is raw, it is arranged in ventilation duct 41, position is close proximity to draft outlet, i.e., close to exhaust fan 43.The combustible gas detecting device
48 settings two, it is spare each other.The combustible gas detecting device 48, should when gas concentration reaches the 30% of lower explosion limit
It can alarm, and before gas concentration reaches the 60% of lower explosion limit, combustible gas detecting device 48 should be able to feed back double fuel
Engine control system, allows it to cut off to machinery space and supplies gaseous fuel.Leaked in the event of gas, finding leakage position
Before reparation, gaseous fuel must not be re-supplied.When the gas burning system has gaseous fuel, the exhausting system 4 should be able to begin
Operating is kept eventually.The combustible gas detecting device 48 should be self-check type, when a certain detection device finds to die certainly by self-test
Barrier, the output of the detection device should be able to automatically disconnect and send alarm, cause the urgent of mistake to stop to avoid detection device failure
Car, when any detection device fails, remaining gas detection device should meet that detection requires；The combustible gas detecting device
48 sense of hearing and visual alarm should be located in bridge and engine control room, and without any delay.
In conclusion the utility model effectively overcomes various shortcoming of the prior art and has high industrial exploitation value
Value.
The above embodiments are only illustrative of the principle and efficacy of the utility model, new not for this practicality is limited
Type.Any person skilled in the art can all carry out above-described embodiment under the spirit and scope without prejudice to the utility model
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the revealed essence of the utility model
God and all equivalent modifications completed under technological thought or change, should be covered by the claim of the utility model.
Claims (9)
1. a kind of low-pressure fuel gas double-wall pipe ventilating system, it is characterised in that lead to including two or more mutually independent double-wall pipes
Wind subsystem (1), each double-wall pipe ventilation subsystem (1) include gas burning system (2) and the air inlet system being located in engine room casing (11)
Unite (3), the gas burning system (2) includes gas inlet (21), combustion gas gas returning port (22) and combustion gas valve group (23), the inlet air
System (3) includes the first perflation ventilation case (31) and the second perflation ventilation case (32), and the first perflation ventilation case (31) passes through
First double-wall pipe (24) is connected with combustion gas valve group (23), and the combustion gas valve group (23) is sent out by the second double-wall pipe (25) and double fuel
Motivation (26) connects, and first double-wall pipe (24) includes the first outer tube (241) and the first inner tube (242), the gas inlet
Mouth (21) is connected with first inner tube (242)；The combustion gas gas returning port (22) is sent out by the 3rd double-wall pipe (27) and double fuel
Motivation (26) connects, and the 3rd double-wall pipe (27) includes the 3rd outer tube (271) and the 3rd inner tube (272), the combustion gas return-air
Mouth (22) is connected with the 3rd inner tube (272), and the 3rd outer tube (271) is led to by blast pipe (33) and second air inlet
Bellows (32) connect；The air outlet of the combustion gas valve group (23) is connected by ventilation duct (41) with exhausting system (4).
2. low-pressure fuel gas double-wall pipe ventilating system according to claim 1, it is characterised in that：The first perflation ventilation case
(31) air inlet is equipped with the first air-inlet grille (311), and the air inlet of the second perflation ventilation case (32) is equipped with the second inlet air
Grid (321).
3. low-pressure fuel gas double-wall pipe ventilating system according to claim 2, it is characterised in that：First outer tube (241)
The upper position close to air inlet is equipped with the first air flow proving switch (28), close to the position of air inlet equipped with the on the blast pipe
Two air flow proving switch (34).
4. low-pressure fuel gas double-wall pipe ventilating system according to claim 1, it is characterised in that：First outer tube (241)
Air inlet be equipped with the first adjustable orifice plate (35), the air inlet of the blast pipe is equipped with the second adjustable orifice plate
(36)。
5. low-pressure fuel gas double-wall pipe ventilating system according to claim 1, it is characterised in that：Exhausting system (4) bag
Plenum chamber (42) and at least one exhaust fan (43) are included, the plenum chamber (42) is connected with the air outlet of the ventilation duct (41),
Each exhaust fan (43) is connected with the plenum chamber (42).
6. low-pressure fuel gas double-wall pipe ventilating system according to claim 5, it is characterised in that：Each exhaust fan (43) leads to
Wind outlet is covered with flame screen (44).
7. the low-pressure fuel gas double-wall pipe ventilating system according to claim 5 or 6, it is characterised in that：The exhaust fan (43)
Equipped with two, the air pipeline that each exhaust fan (43) is connected with the plenum chamber (42) is equipped with check-valves (45) and butterfly valve
(46)。
8. the low-pressure fuel gas double-wall pipe ventilating system according to claim 5 or 6, it is characterised in that：The ventilation duct (41)
It is equipped with pressure gauge (47).
9. the low-pressure fuel gas double-wall pipe ventilating system according to claim 5 or 6, it is characterised in that：The ventilation duct (41)
It is equipped with combustible gas detecting device (48).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720945078.XU CN207245887U (en) | 2017-07-31 | 2017-07-31 | Low-pressure fuel gas double-wall pipe ventilating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720945078.XU CN207245887U (en) | 2017-07-31 | 2017-07-31 | Low-pressure fuel gas double-wall pipe ventilating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207245887U true CN207245887U (en) | 2018-04-17 |
Family
ID=61880141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720945078.XU Active CN207245887U (en) | 2017-07-31 | 2017-07-31 | Low-pressure fuel gas double-wall pipe ventilating system |
Country Status (1)
| Country | Link |
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| CN (1) | CN207245887U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519961A (en) * | 2018-11-06 | 2019-03-26 | 南通中远海运川崎船舶工程有限公司 | Fuel conveying pipe of two-fuel LNG ship ventilating system and aeration control method |
| CN112031954A (en) * | 2020-09-08 | 2020-12-04 | 青岛双瑞海洋环境工程股份有限公司 | Double-wall pipe ventilation system of LNG power ship |
| CN112081688A (en) * | 2020-08-04 | 2020-12-15 | 沪东中华造船(集团)有限公司 | Method for adjusting ventilation pressure of double-wall pipe and orifice plate assembly |
| CN114033582A (en) * | 2021-11-12 | 2022-02-11 | 中船动力研究院有限公司 | Gas, ventilative distributor and boats and ships |
| CN114576044A (en) * | 2021-11-18 | 2022-06-03 | 上海江南长兴造船有限责任公司 | Gas supply system of dual-fuel generator and ship comprising same |
-
2017
- 2017-07-31 CN CN201720945078.XU patent/CN207245887U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519961A (en) * | 2018-11-06 | 2019-03-26 | 南通中远海运川崎船舶工程有限公司 | Fuel conveying pipe of two-fuel LNG ship ventilating system and aeration control method |
| CN112081688A (en) * | 2020-08-04 | 2020-12-15 | 沪东中华造船(集团)有限公司 | Method for adjusting ventilation pressure of double-wall pipe and orifice plate assembly |
| CN112031954A (en) * | 2020-09-08 | 2020-12-04 | 青岛双瑞海洋环境工程股份有限公司 | Double-wall pipe ventilation system of LNG power ship |
| CN112031954B (en) * | 2020-09-08 | 2021-10-15 | 青岛双瑞海洋环境工程股份有限公司 | Double-wall pipe ventilation system of LNG power ship |
| CN114033582A (en) * | 2021-11-12 | 2022-02-11 | 中船动力研究院有限公司 | Gas, ventilative distributor and boats and ships |
| CN114033582B (en) * | 2021-11-12 | 2023-02-03 | 中船动力研究院有限公司 | Gas, ventilative distributor and boats and ships |
| CN114576044A (en) * | 2021-11-18 | 2022-06-03 | 上海江南长兴造船有限责任公司 | Gas supply system of dual-fuel generator and ship comprising same |
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