CN117404222A - Methanol over-boiling point injection device based on waste heat recovery - Google Patents
Methanol over-boiling point injection device based on waste heat recovery Download PDFInfo
- Publication number
- CN117404222A CN117404222A CN202311263962.1A CN202311263962A CN117404222A CN 117404222 A CN117404222 A CN 117404222A CN 202311263962 A CN202311263962 A CN 202311263962A CN 117404222 A CN117404222 A CN 117404222A
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- China
- Prior art keywords
- waste heat
- pipe
- methanol
- pressure oil
- double
- 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.)
- Pending
Links
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 123
- 239000002918 waste heat Substances 0.000 title claims abstract description 53
- 238000002347 injection Methods 0.000 title claims abstract description 42
- 239000007924 injection Substances 0.000 title claims abstract description 42
- 238000011084 recovery Methods 0.000 title claims abstract description 26
- 238000009835 boiling Methods 0.000 title claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 238000002485 combustion reaction Methods 0.000 abstract description 7
- 238000004904 shortening Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 26
- 239000000446 fuel Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
- F02G5/02—Profiting from waste heat of exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
- F02M53/02—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means with fuel-heating means, e.g. for vaporising
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention provides a methanol over-boiling point injection device based on waste heat recovery, which comprises a methanol injection system and a waste heat recovery heating system, wherein the methanol injection system is additionally provided with a one-way valve and a double-layer high-pressure oil pipe is replaced on the basis of the existing high-pressure common rail system, and methanol is connected to an oil injector through an oil rail, the one-way valve and the double-layer high-pressure oil pipe in sequence; the waste heat recovery system comprises a waste heat recoverer, a heating pipe, an electromagnetic valve and a return pipe; the waste heat recoverer is arranged at the rear end of the turbine, and a circulating working medium is arranged in the waste heat recoverer; the waste heat recoverer is communicated to the double-layer high-pressure oil pipe through a heating pipe, and an electromagnetic valve is arranged on the heating pipe; the double-layer high-pressure oil pipe is communicated to the waste heat recoverer through a return pipe, and a temperature sensor is arranged on the return pipe. The invention can effectively improve the mixing effect of methanol and air, thereby reducing the circulation fluctuation of the ignition engine and shortening the combustion duration.
Description
Technical Field
The invention belongs to the field of engines, and particularly relates to a methanol over-boiling point injection device based on waste heat recovery.
Background
The rate of fuel-air mixing affects the rate of combustion reactions to some extent in the combustion process of an internal combustion engine. Compared with petroleum distillate fuel, methanol is a pure fuel with single physical and chemical properties and low boiling point under normal pressure, and the over-boiling point injection technology is easier to realize. The over-boiling point injection means that the temperature of the fuel reaches a certain temperature before the fuel is injected by the fuel injector, and the temperature is lower than the boiling point of methanol under the injection pressure and higher than the boiling point under the environmental pressure of the fuel injector. When the methanol is sprayed out and enters the environment where the oil injector is located, the boiling point is reduced while the pressure is reduced, and the methanol is directly gasified, so that the time of the traditional oil injection, liquid drop crushing, atomizing and evaporating process can be greatly reduced, the oil-gas mixing rate is improved, and the effects of reducing the circulation variation and shortening the combustion duration of the ignition engine are greatly promoted;
the existing methanol injection technology is mostly based on a gasoline engine pump nozzle oil injection system or a high-pressure common rail oil injection technology, and in an air flue injection ignition type methanol engine, the problems of poor oil-gas mixing and large engine cycle fluctuation exist, and the over-boiling point injection technology aims to solve the problems.
Disclosure of Invention
In view of the above, the invention aims to provide a methanol over-boiling point injection device based on waste heat recovery, which effectively improves the oil-gas mixing rate, thereby reducing the cycle fluctuation of an ignition engine and shortening the combustion duration.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
a methanol over-boiling point injection device based on waste heat recovery, which comprises a methanol injection system and a waste heat recovery heating system,
the methanol injection system is provided with a one-way valve and a double-layer high-pressure oil pipe on the basis of the existing high-pressure common rail system, and the oil rail is connected to the oil injector through the one-way valve and the double-layer high-pressure oil pipe in sequence;
the waste heat recovery system comprises a waste heat recoverer, a heating pipe, an electromagnetic valve and a return pipe; the waste heat recoverer is arranged at the rear end of the turbine, and a circulating working medium is arranged in the waste heat recoverer;
the waste heat recoverer is communicated to the double-layer high-pressure oil pipe through a heating pipe, and an electromagnetic valve is arranged on the heating pipe;
the double-layer high-pressure oil pipe is communicated to the waste heat recoverer through a return pipe, and a temperature sensor is arranged on the return pipe.
Further, the compressor is arranged on one side of the turbine, the front end of the compressor is provided with an air filter, the compressor is communicated to the cylinder body through an air inlet pipe, and an intercooler is arranged on the air inlet pipe.
Further, the temperature sensor and the electromagnetic valve are controlled by PID.
Furthermore, the double-layer high-pressure oil pipe is characterized in that methanol flows in the inner layer, and circulating working medium flows in the outer layer.
Further, the temperature sensor is arranged at the position where the circulating working medium flows out of the high-pressure oil pipe.
Compared with the prior art, the methanol over-boiling point injection device based on waste heat recovery has the following advantages:
(1) The methanol over-boiling point injection device based on waste heat recovery can effectively improve the oil-gas mixing rate, thereby reducing the cycle fluctuation of an ignition engine and shortening the combustion duration.
(2) Compared with other heating devices, the methanol over-boiling point injection device based on waste heat recovery does not need to consume extra energy by recovering heat in waste gas.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 is a schematic diagram of a methanol over-boiling point injection device based on waste heat recovery according to an embodiment of the invention.
Reference numerals illustrate:
1. a one-way valve; 2. an oil rail; 3. an air inlet pipe; 4. an intercooler; 5. an air cleaner; 6. a compressor; 7. a turbine; 8. a waste heat recoverer; 9. heating pipes; 10. an electromagnetic valve; 11. a return pipe; 12. an oil injector; 13. double-layer high-pressure oil pipe; 14. a temperature sensor.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
The methanol over-boiling point injection device based on waste heat recovery comprises a methanol injection system and a waste heat recovery heating system as shown in figure 1;
the methanol injection system is added with a one-way valve 1 and a double-layer high-pressure oil pipe 13 on the basis of the existing high-pressure common rail system, and the oil rail 2 is connected to an oil injector through the one-way valve 1 and the double-layer high-pressure oil pipe 13 in sequence;
the waste heat recovery system comprises a waste heat recoverer 8, a heating pipe 9, an electromagnetic valve 10 and a return pipe 11; the waste heat recoverer 8 is arranged at the rear end of the turbine 7, and a circulating working medium is arranged in the waste heat recoverer 8;
the waste heat recoverer 8 is communicated to a double-layer high-pressure oil pipe 13 through a heating pipe 9, and an electromagnetic valve 10 is arranged on the heating pipe 9;
the double-layer high-pressure oil pipe 13 is communicated with the waste heat recoverer 8 through a return pipe 11, and a temperature sensor 14 is arranged on the return pipe 11.
The methanol injection system is based on the existing common rail oil injection technology, and a one-way valve 1 is added on a high-pressure oil pipe behind an oil rail 2 so as to prevent heated fuel pressure from rising to flow back to the oil rail 2 and flowing back to an oil tank through an oil return pipeline to cause potential safety hazards. The existing common rail oil injection technology is that fuel enters an oil rail 2 for pressure stabilization after being boosted by a high-pressure oil pump and then enters an oil injector 12 through a high-pressure oil pipe; after being reformed, the fuel is boosted by a high-pressure oil pump and then enters an oil rail 2 for stabilizing pressure, passes through a high-pressure oil pipe and enters an oil injector 12 through a one-way valve 1 in the high-pressure oil pipe.
Preferably, the compressor 6 is arranged at one side of the turbine 7, the front end of the compressor 6 is provided with an air filter 5, the compressor 6 is communicated to the cylinder body through the air inlet pipe 3, and the air inlet pipe 3 is provided with the intercooler 4.
Preferably, the temperature sensor 14 and the solenoid valve 10 are controlled by PID.
Preferably, the double-layer high-pressure oil pipe 13 is provided with an inner layer flowing methanol and an outer layer flowing circulating working medium.
Preferably, the temperature sensor 14 is disposed at a position where the circulating working fluid flows out of the high-pressure oil pipe.
Examples: the invention is explained by taking a single-stage exhaust gas turbine supercharged engine as an example, as shown in fig. 1, the methanol over-boiling point injection device based on waste heat recovery comprises a methanol injection system and a waste heat recovery heating system;
the methanol injection system is added with a one-way valve 1 and a double-layer high-pressure oil pipe 13 is replaced on the basis of the existing high-pressure common rail system, and the oil rail 2 is connected to an oil injector through the one-way valve 1 and the double-layer high-pressure oil pipe 13 in sequence; wherein the one-way valve 1 is in one-way conduction from the oil rail 2 to the oil injector 12, methanol flows in the inner layer of the double-layer high-pressure oil pipe 13, and circulating working medium flows in the outer layer.
The waste heat recovery heating system comprises a waste heat recoverer 8 (a multi-stage supercharged engine is arranged on an exhaust pipe at the rear end of a final stage turbine 7) on an exhaust pipe at the rear end of the turbine 7, a heating pipe 9, an electromagnetic valve 10, a double-layer high-pressure oil pipe 13, a temperature sensor 14 and a return pipe 11;
the waste heat recoverer 8 is a high-temperature and high-pressure resistant cavity sleeved outside the exhaust pipe, and a circulating working medium matched with the exhaust temperature of the engine is arranged in the waste heat recoverer; for a certain engine which is fixed, the cycle working medium is determined;
after the temperature of the circulating working medium in the waste heat recoverer 8 is increased to a state close to the temperature of an exhaust pipe, the circulating working medium flows out through a heating pipe 9 at the top of the waste heat recoverer 8, controls the flow of the circulating working medium through an electromagnetic valve 10, and then flows into an outer-layer oil pipe in the double-layer high-pressure oil pipe 13 to heat methanol in an inner-layer oil pipe; the position of the circulating working medium flowing out of the high-pressure oil pipe is provided with a temperature sensor 14, and then flows back to the bottom of the waste heat recoverer 8 through a return pipe 11.
The temperature sensor 14 and the solenoid valve 10 need to establish PID control for controlling parameters of the temperature sensor 14 by adjusting the opening of the solenoid valve 10. The temperature of methanol in the inner high-pressure oil pipe reaches the required temperature of the over-boiling point injection by adjusting the temperature when the circulating working medium flows out of the double-layer high-pressure oil pipe 13, the control temperature of the over-boiling point injection is different, and the opening of the electromagnetic valve 10 is also different for the direct injection in the cylinder and the requirement of the air channel injection.
The double-layer high-pressure oil pipe 13 can also be realized by winding the heating pipe 9 in a serpentine manner outside the single-layer high-pressure oil pipe.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (4)
1. Methanol over-boiling point injection apparatus based on waste heat recovery, its characterized in that: the system comprises a methanol injection system and a waste heat recovery heating system, wherein the methanol injection system is added with a one-way valve and is replaced by a double-layer high-pressure oil pipe on the basis of the existing high-pressure common rail system, and the oil rail is connected to an oil injector through the one-way valve and the double-layer high-pressure oil pipe in sequence;
the waste heat recovery system comprises a waste heat recoverer, a heating pipe, an electromagnetic valve and a return pipe; the waste heat recoverer is arranged at the rear end of the turbine, and a circulating working medium is arranged in the waste heat recoverer;
the waste heat recoverer is communicated to the double-layer high-pressure oil pipe through a heating pipe, and an electromagnetic valve is arranged on the heating pipe;
the double-layer high-pressure oil pipe is communicated to the waste heat recoverer through a return pipe, and a temperature sensor is arranged on the return pipe.
2. The methanol over-boiling point injection device based on waste heat recovery as claimed in claim 1, wherein: the temperature sensor and the electromagnetic valve are controlled by PID.
3. The methanol over-boiling point injection device based on waste heat recovery as claimed in claim 1, wherein: the double-layer high-pressure oil pipe is characterized in that methanol flows in the inner layer, and circulating working medium flows in the outer layer.
4. The methanol over-boiling point injection device based on waste heat recovery as claimed in claim 1, wherein: the temperature sensor is arranged at the position where the circulating working medium flows out of the high-pressure oil pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311263962.1A CN117404222A (en) | 2023-09-28 | 2023-09-28 | Methanol over-boiling point injection device based on waste heat recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311263962.1A CN117404222A (en) | 2023-09-28 | 2023-09-28 | Methanol over-boiling point injection device based on waste heat recovery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117404222A true CN117404222A (en) | 2024-01-16 |
Family
ID=89489931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311263962.1A Pending CN117404222A (en) | 2023-09-28 | 2023-09-28 | Methanol over-boiling point injection device based on waste heat recovery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117404222A (en) |
-
2023
- 2023-09-28 CN CN202311263962.1A patent/CN117404222A/en active Pending
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