CN204299724U - A kind of marine engine LNG/ diesel dual-fuel blender - Google Patents
A kind of marine engine LNG/ diesel dual-fuel blender Download PDFInfo
- Publication number
- CN204299724U CN204299724U CN201420745185.4U CN201420745185U CN204299724U CN 204299724 U CN204299724 U CN 204299724U CN 201420745185 U CN201420745185 U CN 201420745185U CN 204299724 U CN204299724 U CN 204299724U
- Authority
- CN
- China
- Prior art keywords
- mixer
- core
- fuel
- blender
- natural gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 42
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000003345 natural gas Substances 0.000 claims abstract description 33
- 239000007789 gas Substances 0.000 claims abstract description 22
- 238000005507 spraying Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 abstract description 6
- 239000007924 injection Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 230000009977 dual effect Effects 0.000 abstract description 2
- 238000003915 air pollution Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 7
- 239000002283 diesel fuel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000008246 gaseous mixture Substances 0.000 description 2
- 238000005273 aeration Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
本实用新型公开了一种船用发动机LNG/柴油双燃料混合器。它包括一混合器芯和一混合器外部件；混合器芯和混合器外部件均呈筒体状；混合器芯套设于混合器外部件的腔体内，且混合器芯与混合器外部件之间形成一环形腔室，环形腔室与混合器外部件上设置的天然气进气道相连通；混合器芯的侧壁与环形腔室的位置相应处设有若干个天然气喷射孔。本实用新型船用发动机LNG/柴油双燃料混合器无传统混合器的喉口设计，减小了气体流动过程中的阻力，从而减少了气体流动过程中的流动损失，增加了充气效率；另外，混合器芯的均匀分布的喷射孔设计与混合器外部件和混合器芯配合形成的环形腔室能够增加充气量，使得空气和天然气充分混合，大幅度降低了柴油机排放，减少对大气的污染。
The utility model discloses a marine engine LNG/diesel dual fuel mixer. It includes a mixer core and a mixer outer part; both the mixer core and the mixer outer part are in the shape of a cylinder; the mixer core is sleeved in the cavity of the mixer outer part, and the mixer core and the mixer outer part An annular chamber is formed between them, and the annular chamber communicates with the natural gas inlet channel provided on the outer part of the mixer; the side wall of the mixer core is provided with several natural gas injection holes corresponding to the positions of the annular chamber. The utility model marine engine LNG/diesel dual-fuel mixer does not have the throat design of the traditional mixer, which reduces the resistance in the gas flow process, thereby reducing the flow loss in the gas flow process and increasing the inflation efficiency; in addition, the mixing The evenly distributed injection hole design of the core and the annular chamber formed by the cooperation of the outer parts of the mixer and the mixer core can increase the amount of air to be filled, so that the air and natural gas can be fully mixed, greatly reducing diesel engine emissions and reducing air pollution.
Description
Technical field
The utility model relates to a kind of engine of boat and ship LNG fuel feed system, is specifically related to a kind of marine engine LNG/ diesel dual-fuel blender.
Background technology
The mixing of gas easily produces layering, affects mixed effect, have impact on economy and the dynamic property of engine.Natural gas is the gaseous fuel based on methane, and its molecular weight is less than normal, and H/C value is up to about 4.Owing to being all gaseous state when natural gas mixes with air in engine, its mist is more even compared with diesel oil, burning is more complete, such diesel engine is mixed and is burnt the soot emissions that natural gas significantly can reduce diesel engine, reduce diesel engine to the pollution of atmospheric environment, the fuel structure of diesel engine can also be improved simultaneously.Therefore, diesel oil is mixed and is burnt the engine of natural gas and obtain and apply comparatively widely.
In early stage research, double fuel engine of boat and ship great majority are all adopt mechanical type fuel supply system, namely blender is installed on inlet manifold or in performance gaseous fuel is blended in air enters cylinder as charge, utilize the swabbing action of cylinder during induction stroke, the vacuum that air current flow in admission line is formed carrys out intake-gas fuel, and wherein blender has air-fuel mixture amount control and air-fuel ration control two functions.Dynamic property and the former machine of the dual fuel engine after repacking are more or less the same, the substitution rate of gaseous fuel to diesel oil is on the low side, HC and the CO concentration of toxic emission is higher, and natural gas easily produces layering with mixing of air, affect mixed effect, have impact on economy and the dynamic property of engine.
The intake method that traditional Venturi tube mixer adopts gaseous fuel to be entered by trunnion periphery, how to flow along tube wall after gaseous fuel enters blender, be difficult to spread to pipeline center, comparatively h air flow velocity is low for throttle opening, the natural gas sprayed by trunnion periphery is in the conflict of stream central authorities, and be diffused into rapidly whole stream, thus more fully can mix with air, make gaseous mixture distribution uniform in air inlet pipe; Along with throttle opening increases, air mass flow increases gradually, and the natural gas gushed out by trunnion periphery has little time, to pipeline center's diffusion, fully to mix, make gaseous mixture more and more uneven with air.
How to control air and natural gas quantity delivered, to realize the best oil-gas ratio of LNG/ diesel dual-fuel marine engine and to reach best mixing and burn effect, make marine engine have good power performance, economic performance and discharge performance, it is the technical barrier that those skilled in the art attempt to solve always.
Utility model content
The purpose of this utility model is to provide a kind of marine engine LNG/ diesel dual-fuel blender, and it can realize the work of marine engine LNG/ diesel dual-fuel, meets optimal air-fuel ratio, allows natural gas and air fully mix.
Marine engine LNG/ diesel dual-fuel blender provided by the utility model, comprises a mixer core and a blender exterior part;
Described mixer core and described blender exterior part are all in cylinder-shaped;
Described mixer core is sheathed in the cavity of described blender exterior part, and forms an annular compartment between described mixer core and described blender exterior part, and described annular compartment is connected with the natural gas air intake duct that described blender exterior part is arranged;
The sidewall of described mixer core and the corresponding position, position of described annular compartment are provided with several gas spraying perforations.
In described Dual-fuel mixer, be interference fit between described mixer core and described blender exterior part.
In described Dual-fuel mixer, for being evenly arranged between described gas spraying perforation, to make natural gas be injected into uniformly in the cavity (i.e. air enter passage) of described mixer core, mix with the air entered.
When using the utility model Dual-fuel mixer, described Dual-fuel mixer can be connected in the LNG fuel feed system shown in Fig. 1, concrete supply flow process is: the output of LNG bottle is connected with the input of evaporimeter by feed liquid pipeline, the output of evaporimeter is connected with the input of natural gas flow control valve, flow-control end and the gas discharge of natural gas flow control valve control actuator and are connected, the output of natural gas flow control valve is connected with the input of air mixer, the output of air mixer is connected with the inlet manifold of marine engine, thus by the mixed gas delivery of air and natural gas adsorption in the cylinder of marine engine, the utility model Dual-fuel mixer is positioned on the inlet manifold after booster, and entrance one end exports with injection valve and is connected, and passes into the natural gas from injection valve, the other end is connected with turbocharger, passes into the pressurized air through air filter and turbocharger.Fully mix in pressurized air and the passage of natural gas in this blender, flowing to cylinder by the outlet of blender through charge air cooler.
The utility model marine engine LNG/ diesel dual-fuel hybrid instrument has the following advantages:
The utility model marine engine LNG/ diesel dual-fuel blender designs without the aditus laryngis of traditional mixer, reduces the resistance in gas flow, thus decreases the flow losses in gas flow, add charging efficiency; In addition, the equally distributed spray-hole design of mixer core coordinates the annular compartment formed to increase aeration quantity with blender exterior part and mixer core, air and natural gas are fully mixed, ensure that the economy of engine of boat and ship, also considerably reduce diesel emission simultaneously, reduce the pollution to air.
Accompanying drawing explanation
Fig. 1 is a kind of gas fuel feed system comprising the utility model Dual-fuel mixer.
Fig. 2 is the profile of the utility model Dual-fuel mixer.
Fig. 3 is the profile of blender exterior part in the utility model Dual-fuel mixer.
Fig. 4 is the profile of mixer core in the utility model Dual-fuel mixer.
In figure, each mark is as follows:
1 natural gas air intake duct, 2 annular compartments, 3 mixed gas outlets, 4 gas spraying perforations, 5 blender exterior parts, 6 mixer core, 7 air intakes.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described further, but the utility model is not limited to following examples.
As shown in Figure 2, for the generalized section of the utility model Dual-fuel mixer, it comprises a cylinder-shaped mixer core 6 and a cylinder-shaped blender exterior part 5, wherein, as shown in Figure 4, the generalized section of blender exterior part 5 as shown in Figure 3 for the generalized section of mixer core 6.Mixer core 6 is sheathed in the cavity of blender exterior part 5, and be interference fit between the two, between mixer core 6 and blender exterior part 5, define an annular compartment 2, this annular compartment 2 is connected with the natural gas air intake duct 1 that blender exterior part 5 is arranged, for passing into natural gas.In order to realize passing into the mixing to the natural gas in annular compartment 2, the sidewall of the mixer core 6 of the corresponding position, position with annular compartment 2 is provided with 32 the gas spraying perforations 4 be evenly arranged, and then the natural gas passed into enters in the chamber of mixer core 6 by above-mentioned gas spraying perforation 4, namely can mix with the air entered from air intake 7, then discharge from mixed gas outlet 3.
The course of work of the utility model engine of boat and ship LNG/ diesel dual-fuel blender is as follows, please refer to the fuel feed system shown in Fig. 1: natural gas is flowed to internal mixer by natural gas access 1 under the differential pressure action of injection valve exit and the utility model internal mixer, air high velocity stream after air filter filters and be turbocharger supercharged is crossed in the chamber of mixer core 6, and the chamber that natural gas enters mixer core 6 by 32 the equally distributed gas spraying perforations 4 be arranged in mixer core fully mixes with air.
In working process of diesel engine, the amount entering this internal mixer natural gas changes with the course of work difference of diesel engine, be lean on electric control system controls gas injector to change deliverability of gas, can ensure that air and natural gas mix fully in internal mixer along the equally distributed natural gas injection of mixer core.
Claims (3)
1. a marine engine LNG/ diesel dual-fuel blender, is characterized in that: it comprises a mixer core and a blender exterior part;
Described mixer core and described blender exterior part are all in cylinder-shaped;
Described mixer core is sheathed in the cavity of described blender exterior part, and forms an annular compartment between described mixer core and described blender exterior part, and described annular compartment is connected with the natural gas air intake duct that described blender exterior part is arranged;
The sidewall of described mixer core and the corresponding position, position of described annular compartment are provided with several gas spraying perforations.
2. Dual-fuel mixer according to claim 1, is characterized in that: be interference fit between described mixer core and described blender exterior part.
3. Dual-fuel mixer according to claim 1 and 2, is characterized in that: for being evenly arranged between described gas spraying perforation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420745185.4U CN204299724U (en) | 2014-12-01 | 2014-12-01 | A kind of marine engine LNG/ diesel dual-fuel blender |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420745185.4U CN204299724U (en) | 2014-12-01 | 2014-12-01 | A kind of marine engine LNG/ diesel dual-fuel blender |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204299724U true CN204299724U (en) | 2015-04-29 |
Family
ID=53105269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420745185.4U Expired - Lifetime CN204299724U (en) | 2014-12-01 | 2014-12-01 | A kind of marine engine LNG/ diesel dual-fuel blender |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204299724U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500277A (en) * | 2014-12-01 | 2015-04-08 | 中海石油气电集团有限责任公司 | LNG/diesel dual-fuel mixer for marine engine |
-
2014
- 2014-12-01 CN CN201420745185.4U patent/CN204299724U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500277A (en) * | 2014-12-01 | 2015-04-08 | 中海石油气电集团有限责任公司 | LNG/diesel dual-fuel mixer for marine engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150429 |