CN107542597B - Generating set capable of realizing dual-fuel conversion of diesel oil and liquefied natural gas - Google Patents
Generating set capable of realizing dual-fuel conversion of diesel oil and liquefied natural gas Download PDFInfo
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- CN107542597B CN107542597B CN201710873011.4A CN201710873011A CN107542597B CN 107542597 B CN107542597 B CN 107542597B CN 201710873011 A CN201710873011 A CN 201710873011A CN 107542597 B CN107542597 B CN 107542597B
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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
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- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The invention relates to a generator set capable of realizing dual-fuel conversion of diesel oil and liquefied natural gas, which comprises a liquefied natural gas tank, wherein an air outlet of the liquefied natural gas tank is connected with one end of a low-temperature hose, the other end of the low-temperature hose is connected with a decompression heater, the decompression heater is connected with an inlet end of a double-regulating valve through a first hose, an outlet end of the double-regulating valve is connected with a mixer through a second hose, an air inlet filter of an internal combustion engine is further connected to the mixer, an air outlet of the internal combustion engine is connected with a muffler through an exhaust pipe of the internal combustion engine, and a generator is connected with the internal combustion engine and drives the generator to generate electricity. The invention has simple structure and low reconstruction cost, can be widely used for reconstructing the stock diesel generator set, and has the advantages of small change of natural gas substitution rate, high comprehensive diesel substitution rate and high adaptation environment temperature under various loads; the invention has compact integral structure, can be integrated in a container type silent box with standard size, has the advantage of low exhaust smoke, and is widely applied to oil fields, field engineering and hot areas.
Description
Technical Field
The invention relates to the field of internal combustion engine generator sets, in particular to a generator set capable of realizing dual-fuel conversion of diesel and liquefied natural gas.
Background
At the moment of increasingly shortage of petroleum resources and increasingly worsening environment, energy conservation and emission reduction are unprecedented. The soot emission of diesel engines is serious and has great harm to urban environment and human health. Without cost effective solutions, diesel applications are subject to increasingly stringent emissions regulations.
Disclosure of Invention
The applicant has made research and improvement to the above existing problems, and provides a generator set capable of realizing dual-fuel conversion of diesel and liquefied natural gas, which has the advantages of small pumping loss, high thermal efficiency and low soot emission.
The technical scheme adopted by the invention is as follows:
the generator set capable of realizing dual-fuel conversion of diesel and liquefied natural gas comprises a liquefied natural gas tank, wherein an air outlet of the liquefied natural gas tank is connected with one end of a low-temperature hose, the other end of the low-temperature hose is connected with a decompression heater, the decompression heater is connected with an inlet end of a double-regulating valve through a first hose, an outlet end of the double-regulating valve is connected with a mixer through a second hose, an air inlet filter of an internal combustion engine is further connected to the mixer, the mixer is connected with one end of an air outlet pipe of the air inlet booster through an air inlet booster, the other end of the air outlet pipe of the air inlet booster is connected with an air inlet of the internal combustion engine, an air outlet of the internal combustion engine is connected with a muffler through an air outlet pipe of the internal combustion engine, and a generator is connected with the internal combustion engine and drives the generator to generate electricity; the internal combustion engine cylinder liner water radiator is connected with the internal combustion engine in parallel through an internal combustion engine cylinder liner water radiator inlet pipe and an internal combustion engine cylinder liner water radiator outlet pipe, the internal combustion engine cylinder liner water radiator inlet pipe is connected with a heating circulation inlet end of the decompression heater through a decompression heater water inlet pipe, and the internal combustion engine cylinder liner water radiator outlet pipe is connected with a heating circulation outlet end of the decompression heater through a decompression heater water outlet pipe; the diesel engine fuel injection system further comprises a fuel injection pump connected with the internal combustion engine, a stop electromagnetic valve and a fuel injection pump fuel supply rack are arranged in the fuel injection pump, the stop electromagnetic valve and the fuel injection pump fuel supply rack are disconnected, and a fuel supply rack limiting electromagnetic valve for realizing a diesel engine dual-fuel state is further arranged on the fuel injection pump fuel supply rack.
The further technical scheme is as follows:
a flowmeter and an electric butterfly valve for measuring the consumption natural gas flow are sequentially arranged at the other end of the low-temperature hose connected with the decompression heater;
an electric three-way valve is arranged at the junction of the water inlet pipe of the decompression heater and the water inlet pipe of the cylinder sleeve water radiator of the internal combustion engine;
the corrosion regulating valve is also connected with an air outlet pipe of the air inlet supercharger through a pressure sensing diaphragm low-pressure side cavity connecting hose of the compound regulating valve;
when in a dual-fuel state, the oil supply rack limiting electromagnetic valve is attracted, so that the distance between the first threaded connection head part of the stopping electromagnetic valve and the second threaded connection head part of the oil supply rack of the oil injection pump is increased until the stopping electromagnetic valve is at a disconnected position;
and processing an annular groove on the inner wall of the mixer, and arranging holes uniformly distributed along the circumferential direction on the throat corresponding to the annular groove.
The beneficial effects of the invention are as follows:
the invention has the advantages of simple structure, low reconstruction cost, wide application in the reconstruction of the stock diesel generator set, small change of natural gas substitution rate under various loads, high comprehensive diesel substitution rate and high adaptation environment temperature; the invention has compact integral structure, can be integrated in a container type silent box with standard size, has the advantages of low exhaust smoke and good mobility, and is widely applied to oil fields, field engineering and hot areas.
The invention modifies the fuel injection pump of the internal combustion engine, and embeds the fuel supply rack limit solenoid valve between the original stop solenoid valve and the fuel supply rack of the fuel injection pump, thereby realizing the switching between the pure diesel state and the dual fuel state, and having good operability, especially for the areas with imperfect natural gas supply.
The natural gas supply system adopts mechanical mixing outside the cylinder, the natural gas supply amount is controlled by the gas pressure in the gas inlet pipe, the internal combustion engine is ensured to have better dynamic performance and economic performance, the working performance of the internal combustion engine is basically unchanged, the operation and maintenance are simple, and the reliability is good.
(IV) in the invention, the internal combustion engine cylinder liner water radiator is arranged to heat the liquefied natural gas, so that the environment temperature resistance of the internal combustion engine cylinder liner water radiator can be improved by at least more than 5 ℃.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of a mixer according to the present invention.
Fig. 3 is a schematic structural diagram of an injection pump in the present invention.
Wherein: 1. liquefied natural gas tank; 2. a low temperature hose; 3. a flow meter; 4. an electric butterfly valve; 5. a depressurizing heater; 6. a water inlet pipe of the decompression heater; 7. an electric three-way valve; 8. a water outlet pipe of the decompression heater; 9. a first hose; 10. a double regulating valve; 11. a second hose; 12. the low-pressure side cavity of the pressure sensing diaphragm of the double regulating valve is connected with a hose; 13. the high-pressure side cavity of the pressure sensing diaphragm of the double regulating valve is connected with a hose; 14. an intake filter for an internal combustion engine; 15. a mixer; 151. a throat; 152. a hole; 16. an intake supercharger; 17. an air outlet pipe of the air inlet booster; 18. an oil injection pump; 19. a stop solenoid valve; 191. a first threaded connection head; 20. an oil supply rack of the oil injection pump; 201. a second threaded connection head; 21. an oil supply rack limiting electromagnetic valve; 22. cylinder liner water radiator of the internal-combustion engine; 23. an internal combustion engine; 24. an exhaust pipe of an internal combustion engine; 25. a muffler; 26. and (5) a generator.
Detailed Description
The following describes specific embodiments of the present invention.
As shown in fig. 1, a generator set capable of realizing dual-fuel conversion of diesel and liquefied natural gas comprises a liquefied natural gas tank 1, wherein an air outlet of the liquefied natural gas tank 1 is connected with one end of a low-temperature hose 2, the other end of the low-temperature hose 2 is connected with a decompression heater 5, and a flowmeter 3 and an electric butterfly valve 4 for measuring consumed natural gas flow are sequentially arranged at the other end of the low-temperature hose 2 connected with the decompression heater 5. As shown in fig. 1, the decompression heater 5 is connected with the inlet end of the double regulating valve 10 through a first hose 9, the outlet end of the double regulating valve 10 is connected with the mixer 15 through a second hose 11, the mixer 15 is also connected with the air inlet filter 14 of the internal combustion engine, the mixer 15 is connected with one end of the air outlet pipe 17 of the air inlet booster through the air inlet booster 16, the other end of the air outlet pipe 17 of the air inlet booster is connected with the air inlet of the internal combustion engine 23, the air outlet of the internal combustion engine 23 is connected with the muffler 25 through the air outlet pipe 24 of the internal combustion engine, and the generator 26 is connected with the internal combustion engine 23 and drives the generator 26 to generate electricity; the internal combustion engine cylinder liner water radiator 22 is connected with the internal combustion engine 22 in parallel through an internal combustion engine cylinder liner water radiator inlet pipe and an internal combustion engine cylinder liner water radiator outlet pipe, the internal combustion engine cylinder liner water radiator inlet pipe is connected with a heating circulation inlet end of the decompression heater 5 through a decompression heater water inlet pipe 6, the internal combustion engine cylinder liner water radiator outlet pipe is connected with a heating circulation outlet end of the decompression heater 5 through a decompression heater water outlet pipe 8, and an electric three-way valve 7 is arranged at the junction of the decompression heater water inlet pipe 6 and the internal combustion engine cylinder liner water radiator inlet pipe. As shown in fig. 1 and 3, the fuel injection system further comprises a fuel injection pump 18 connected with the internal combustion engine 23, a stop electromagnetic valve 19 and a fuel injection pump fuel supply rack 20 are arranged in the fuel injection pump 18, the stop electromagnetic valve 19 and the fuel injection pump fuel supply rack 20 are disconnected, a fuel supply rack limiting electromagnetic valve 21 for realizing a diesel engine dual-fuel state is further arranged on the fuel injection pump fuel supply rack 20, and a rod of the fuel supply rack limiting electromagnetic valve 21 is in threaded connection with a rod of the stop electromagnetic valve 19. The double regulating valve 10 is connected with the outlet of the mixer 15 through a double regulating valve pressure sensing diaphragm low pressure side cavity connecting hose 12, and the corrosion regulating valve 10 is connected with an air inlet supercharger air outlet pipe 17 through a double regulating valve pressure sensing diaphragm high pressure side cavity connecting hose 13. The inner wall of the mixer 15 is provided with ring grooves, holes 152 are uniformly distributed in the circumferential direction on the corresponding throat 151 of the ring grooves, when the internal combustion engine 23 is running, a certain amount of natural gas enters the ring grooves by utilizing the vacuum degree formed at the throat 151, then flows through the holes 152 distributed on the throat 151 to enter the mixing chamber of the mixer 15, and enters the air intake supercharger 16 after being mixed with air, and the size and the number of the holes 152 are selected according to the optimal flow rate when the natural gas amount is required by the maximum power of the internal combustion engine.
The specific working process of the invention is as follows:
as shown in fig. 1 and 3, the manual valve at the outlet of the lng tank 1 is opened, the electric butterfly valve 4, the electric three-way valve 7 and the decompression heater water inlet pipe 6 are closed by power failure, the oil supply rack limiting solenoid valve 21 is opened, and when the oil supply rack limiting solenoid valve 21 is opened, the position of the oil supply rack 20 of the oil injection pump is not changed, so that the oil supply rack 20 of the oil injection pump is not limited, and the internal combustion engine 23 is in a pure diesel fuel state. When the water inlet temperature of the cylinder sleeve water radiator 22 of the internal combustion engine reaches 60 ℃, the electric butterfly valve 4, the electric three-way valve 7, the decompression heater water inlet pipe 6 and the oil supply rack limiting electromagnetic valve 21 are electrified and opened, the oil supply rack limiting electromagnetic valve 21 is in attraction, the distance between the first threaded connection head 191 of the stopping electromagnetic valve 19 and the second threaded connection head 201 of the oil supply rack 20 of the oil injection pump is increased to a position where the stopping electromagnetic valve 19 is disconnected (stopped) and a position where the oil supply rack position is reduced to 50% of oil supply under the maximum torque working condition, and then the internal combustion engine is in a diesel oil and liquefied natural gas dual-fuel state. As shown in fig. 1, when the load of the generator set increases, the electric butterfly valve 4 is gradually opened, the differential pressure between the high-pressure side chamber and the low-pressure side chamber of the pressure-sensitive diaphragm of the double regulating valve 10 is gradually increased, the double regulating valve 10 is gradually opened, the fuel injection pump fuel supply amount is gradually increased to be fully opened under the action of the stop solenoid valve 19 and the fuel supply rack limiting solenoid valve 21 in the state, when the load of the generator set decreases, the electric butterfly valve 4 is gradually closed, the differential pressure between the high-pressure side chamber and the low-pressure side chamber of the pressure-sensitive diaphragm of the double regulating valve 10 is gradually decreased, and the double regulating valve 10 is gradually closed, and the fuel injection pump fuel supply amount is gradually closed under the action of the stop solenoid valve 19 and the fuel supply rack limiting solenoid valve 21 in the state, so that the internal combustion engine 23 is in an idle running state.
As shown in fig. 1, in the stop state, the electric butterfly valve 4, the electric three-way valve 7, the decompression heater water inlet pipe 6 and the oil supply rack limiting solenoid valve 21 are closed in a power-off mode, at this time, the oil supply rack 20 of the oil injection pump is not limited, the internal combustion engine 23 is in a pure diesel fuel state, the internal combustion engine 23 is stopped, and the outlet manual valve of the liquefied natural gas tank 1 is manually closed.
In the invention, the decompression heater 5 is used for decompressing liquefied natural gas at high pressure, the maximum output pressure of the natural gas is 1.5MPa, the minimum output pressure is 1.2MPa, so that the requirements of different working conditions are met, the decompression heater 5 is provided with a safety valve, a heating circulation inlet and a heating circulation outlet, because the liquefied natural gas is required to expand and absorb heat in the decompression gasification process, in order to avoid freezing and damaging an air supply pipeline and other parts, cylinder sleeve circulating water of the cylinder sleeve water radiator 22 of the internal combustion engine is utilized for heating the liquefied natural gas in the gasification process, when the natural gas output pressure of the decompression heater 5 is reduced, the opening power ratio of the electric butterfly valve 4 is increased, when the natural gas output pressure of the decompression heater 5 is increased, the opening power ratio of the electric butterfly valve 4 is reduced, when the natural gas output pressure of the decompression heater 5 exceeds 1.5MPa, the safety valve is opened for decompressing, the electric three-way valve 7 and the rack limiting electromagnetic valve 21 of the water inlet pipe 6 of the electric three-way valve are cut off, so that the rack of the oil injection pump is not limited, and the internal combustion engine is in a pure diesel fuel state.
The above description is illustrative of the invention and not limiting, the scope of the invention being defined by the appended claims, which may be modified in any manner without departing from the basic structure of the invention.
Claims (4)
1. The utility model provides a can realize generating set of diesel oil and liquefied natural gas dual fuel conversion which characterized in that: the low-temperature-resistant liquefied natural gas storage device comprises a liquefied natural gas storage tank (1), wherein a gas outlet of the liquefied natural gas storage tank (1) is connected with one end of a low-temperature hose (2), the other end of the low-temperature hose (2) is connected with a decompression heater (5), the decompression heater (5) is connected with an inlet end of a compound regulating valve (10) through a first hose (9), an outlet end of the compound regulating valve (10) is connected with a mixer (15) through a second hose (11), the compound regulating valve (10) is also connected with an outlet of the mixer (15) through a compound regulating valve pressure sensing diaphragm low-pressure side cavity connecting hose (12), the compound regulating valve (10) is also connected with an air inlet booster air outlet pipe (17) through a compound regulating valve pressure sensing diaphragm high-pressure side cavity connecting hose (13), annular grooves are processed on the inner wall of the mixer (15), and holes (152) which are uniformly distributed along the circumferential direction are formed in corresponding throats (151);
the mixer (15) is also connected with an internal combustion engine air inlet filter (14), the mixer (15) is connected with one end of an air inlet supercharger air outlet pipe (17) through an air inlet supercharger (16), the other end of the air inlet supercharger air outlet pipe (17) is connected with an air inlet of an internal combustion engine (23), an air outlet of the internal combustion engine (23) is connected with a muffler (25) through an internal combustion engine exhaust pipe (24), and a generator (26) is connected with the internal combustion engine (23) and drives the generator (26) to generate electricity; an internal combustion engine cylinder liner water radiator (22) is connected with the internal combustion engine (22) in parallel through an internal combustion engine cylinder liner water radiator inlet pipe and an internal combustion engine cylinder liner water radiator outlet pipe, the internal combustion engine cylinder liner water radiator inlet pipe is connected with a heating cycle inlet end of a decompression heater (5) through a decompression heater water inlet pipe (6), and the internal combustion engine cylinder liner water radiator outlet pipe is connected with a heating cycle outlet end of the decompression heater (5) through a decompression heater water outlet pipe (8); the diesel engine fuel injection system further comprises a fuel injection pump (18) connected with the internal combustion engine (23), a stop electromagnetic valve (19) and a fuel injection pump fuel supply rack (20) are arranged in the fuel injection pump (18), the stop electromagnetic valve (19) and the fuel injection pump fuel supply rack (20) are disconnected, and a fuel supply rack limiting electromagnetic valve (21) for realizing a diesel engine dual-fuel state is further arranged on the fuel injection pump fuel supply rack (20).
2. A generator set capable of dual fuel conversion of diesel and lng as defined in claim 1, wherein: the other end of the low-temperature hose (2) connected with the decompression heater (5) is also sequentially provided with a flowmeter (3) and an electric butterfly valve (4) for measuring the consumed natural gas flow.
3. A generator set capable of dual fuel conversion of diesel and lng as defined in claim 1, wherein: an electric three-way valve (7) is arranged at the junction of the pressure-reducing heater water inlet pipe (6) and the internal combustion engine cylinder sleeve water radiator inlet pipe.
4. A generator set capable of dual fuel conversion of diesel and lng as defined in claim 1, wherein: when in a dual-fuel state, the oil supply rack limiting electromagnetic valve (21) is attracted, so that the distance between the first threaded connection head part (191) of the stopping electromagnetic valve (19) and the second threaded connection head part (201) of the oil supply rack (20) of the oil injection pump is increased until the stopping electromagnetic valve (19) is in a disconnected position.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710873011.4A CN107542597B (en) | 2017-09-25 | 2017-09-25 | Generating set capable of realizing dual-fuel conversion of diesel oil and liquefied natural gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710873011.4A CN107542597B (en) | 2017-09-25 | 2017-09-25 | Generating set capable of realizing dual-fuel conversion of diesel oil and liquefied natural gas |
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| CN107542597A CN107542597A (en) | 2018-01-05 |
| CN107542597B true CN107542597B (en) | 2023-05-12 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4527516A (en) * | 1984-02-06 | 1985-07-09 | Pro-Staff Overload Enterprises Limited | Dual fuel engine |
| CN201162589Y (en) * | 2008-03-06 | 2008-12-10 | 杨华昌 | Gas universal miniature type gaseous propellant engine gas mixer capable of automatic gas regulation |
| CN202431377U (en) * | 2011-12-20 | 2012-09-12 | 遂宁市华旭科技有限公司 | Diesel oil/natural gas double-fuel supply system |
| CN103437870A (en) * | 2013-07-24 | 2013-12-11 | 中国科学院工程热物理研究所 | System and method for comprehensively utilizing residual heat of compressed natural gas engine (CNGE) |
| CN205559086U (en) * | 2016-03-08 | 2016-09-07 | 潍柴动力股份有限公司 | Dual -fuel engine system |
-
2017
- 2017-09-25 CN CN201710873011.4A patent/CN107542597B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4527516A (en) * | 1984-02-06 | 1985-07-09 | Pro-Staff Overload Enterprises Limited | Dual fuel engine |
| CN201162589Y (en) * | 2008-03-06 | 2008-12-10 | 杨华昌 | Gas universal miniature type gaseous propellant engine gas mixer capable of automatic gas regulation |
| CN202431377U (en) * | 2011-12-20 | 2012-09-12 | 遂宁市华旭科技有限公司 | Diesel oil/natural gas double-fuel supply system |
| CN103437870A (en) * | 2013-07-24 | 2013-12-11 | 中国科学院工程热物理研究所 | System and method for comprehensively utilizing residual heat of compressed natural gas engine (CNGE) |
| CN205559086U (en) * | 2016-03-08 | 2016-09-07 | 潍柴动力股份有限公司 | Dual -fuel engine system |
Non-Patent Citations (1)
| Title |
|---|
| 张红光,盛宏至,潘奎润,张锐.车用柴油/天然气双燃料发动机的开发.农业机械学报.2003,(05),第8-11页. * |
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