CN110240952B - Intermittent preparation device and method for nano hydrogen bubble/diesel oil mixed fuel - Google Patents
Intermittent preparation device and method for nano hydrogen bubble/diesel oil mixed fuel Download PDFInfo
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- CN110240952B CN110240952B CN201910467055.6A CN201910467055A CN110240952B CN 110240952 B CN110240952 B CN 110240952B CN 201910467055 A CN201910467055 A CN 201910467055A CN 110240952 B CN110240952 B CN 110240952B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/04—Liquid carbonaceous fuels essentially based on blends of hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/12—Inorganic compounds
- C10L1/1208—Inorganic compounds elements
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2250/00—Structural features of fuel components or fuel compositions, either in solid, liquid or gaseous state
- C10L2250/06—Particle, bubble or droplet size
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Abstract
The invention discloses an intermittent preparation method of a nano hydrogen bubble/diesel oil mixed fuel, which comprises the steps of adding diesel oil into a mixer, sealing, reducing pressure, regulating pressure and supplying hydrogen to the mixer at a constant pressure of 0.5-5 MPa; adjusting the temperature of diesel oil in the mixer to a constant temperature of between room temperature and 150 ℃, stirring for 30-120 min, stopping supplying gas, opening a micro-regulating valve, adjusting the flow rate of gas in a soap film flowmeter to be 0.1-1 ml/min, and releasing diesel oil and hydrogen gas overflowing from the mixer; and when the pressure reaches the normal pressure, taking down the sealing plug, and opening the oil drain valve to release the fluid, namely the nano hydrogen bubble/diesel oil mixed fuel. By applying the mixed fuel, the diesel engine only needs one set of oil supply system without adjusting the hardware of the oil supply system; greatly improves the fuel economy of the diesel engine and reduces the pollutant emission. The combustion performance of the mixed fuel on the diesel engine is improved, and the long-term stable existence of hydrogen bubbles is facilitated; the uniformity and the stability of the nano hydrogen bubble/diesel oil mixed fuel are ensured.
Description
Technical Field
The invention belongs to the preparation of alternative fuels of internal combustion engines, and particularly relates to an intermittent preparation method of a nano hydrogen bubble/diesel oil mixed fuel which can be used as a diesel engine fuel.
Background
For years, internal combustion engines using gasoline and diesel oil as fuel make excellent contribution to economic development and improvement of people's life in the field of power, but the belief crisis of the traditional liquid fuel internal combustion engine is increasingly intensified with the continuous increase of the attention degree of governments and people on energy crisis and environmental pollution in the new century. The traditional liquid fuel internal combustion engine has the outstanding disadvantages in the aspect of pollutant emission, and the research and development of effective pollutant emission reduction technical measures become the key points of life and death of the internal combustion engine.
Hydrogen (H)2) The fuel is a well-known high-efficiency and clean energy source, the research history in the field of internal combustion engines is very long, and researches show that the heat efficiency of a diesel engine can be improved and the pollutant emission can be reduced by combusting pure hydrogen and mixing and combusting the hydrogen and the traditional liquid fuel in the internal combustion engine. At present, the most common combustion modes of hydrogen-containing fuels at home and abroad comprise: pure hydrogen combustion, hydrogen/traditional liquid fuel dual fuel combustion, hydrogen/traditional liquid fuel blending combustion, wherein, hydrogen/traditional liquid fuel blending combustion still includes: hydrogen/conventional liquid fuel dual injection system port injection, hydrogen/conventional liquidThe operation modes of in-cylinder injection of the body fuel double injection system, hydrogen gas inlet channel injection, in-cylinder injection of the traditional liquid fuel and the like. However, the above working modes all require 2 sets of fuel injection systems, which not only results in high hardware cost and difficult arrangement of the fuel injection systems, but also ensures that the hydrogen and the traditional liquid fuel which are respectively injected can achieve the best matching effect, and the air intake optimization and the combustion organization of the dual-injection system internal combustion engine, even the matching calibration, are much more complicated than those of the single-injection system internal combustion engine.
In order to reduce the inconvenience of the dual injection system in designing and using the internal combustion engine, it should be the most convenient solution to configure hydrogen and conventional liquid fuel as homogeneous mixed fuel and inject them by one injection system. However, at normal temperature and normal pressure, the solubility of hydrogen in diesel oil is low, and the proportion of mixed fuel required by improving combustion in a cylinder is difficult to meet, so special mixing, preparation principles and processes are required to be selected for preparing the hydrogen/diesel oil mixed fuel with high mixing proportion. The microbubble mixing technology is a novel heterogeneous mixture preparation technology gradually developed at the end of the last century, and the preparation of a metastable gas/liquid uniform mixture is realized by dispersing gas components into nano and submicron-level micro bubbles in liquid. However, in the existing microbubble mixture preparation technology, the continuous phase is water, the dispersed phase is hydrophobic gases such as air, hydrogen and the like, and the stability of the microbubbles is generally improved by adding a surfactant into the water, so that the microbubbles prepared by the technology actually belong to emulsified microbubbles rather than real gas microbubbles. However, since both diesel and hydrogen do not contain hydrophilic polar structures, surfactants based on hydrophilic/lipophilic amphiphilic structures have little significance in promoting the mixing process of hydrogen and diesel microbubbles, and most surfactants have adverse effects on in-cylinder combustion of diesel engines, so that the preparation of hydrogen/diesel microbubble mixed fuel requires the development of a brand-new bubble generation method.
The research results at home and abroad show that the solubility of hydrogen in diesel oil can be obviously improved by increasing the pressure of hydrogen and the temperature of the diesel oil, for example, the solubility of hydrogen in diesel oil is 0.0114 (mole fraction) at the normal pressure at 50 ℃, and the solubility of hydrogen in diesel oil is improved to 0.0382 (mole fraction) after the pressure of hydrogen is increased to 2 MPa; while at elevated temperature up to 150 c, the solubility of hydrogen in diesel oil was further increased to 0.0405 (mole fraction) at a pressure of 2 MPa. On the other hand, when the temperature and the hydrogen pressure of the continuous phase are reduced, the dissolved hydrogen in the diesel oil is in a supersaturated state and is further converted into bubbles, and the more uniform the temperature and the pressure of the continuous phase are, the smaller the diameter of the bubbles formed by supersaturated and separated hydrogen is (the most of the diameters of the bubbles are in the nanometer level, as shown in fig. 2), and the larger the number of the bubbles is.
Disclosure of Invention
Aiming at the prior art, the invention provides a preparation method of a nano hydrogen bubble/diesel oil mixed fuel which can be directly used as diesel engine fuel based on the principle that dissolved hydrogen is supersaturated to generate nano diameter bubbles.
In order to solve the technical problem, the invention provides an intermittent preparation device of a nano hydrogen bubble/diesel oil mixed fuel, which comprises a hydrogen cylinder, a mixer, an oil/gas separator and a hydrogen processor, wherein the hydrogen cylinder is connected with the mixer; a hydrogen pressure reducing valve, a secondary pressure regulator and a mixer interface are arranged on an air inlet pipeline of the hydrogen cylinder connected to the mixer; the maximum output pressure of the hydrogen pressure reducing valve is greater than 5 MPa; pressure regulation range of the secondary pressure regulator 3: 0-5 MPa; the volume of the mixer is 0.1-10L; a mixer top cover is arranged at the top of the mixer, a sealing rubber gasket is arranged between the mixer and the mixer top cover, and an oil filling port, a sealing plug, a pressure gauge, a safety valve and a micro-regulating valve are arranged on the mixer top cover; the pressure measuring range of the pressure gauge is 0-5 MPa; the opening pressure of the safety valve is 5 MPa; an oil drain valve is arranged at the bottom of the mixer, and a stirrer is arranged in the mixer; a magnetic stirring heater is arranged below the mixer, the maximum rotating speed of the magnetic stirring heater 18 is not lower than 5 revolutions per second, and the maximum heating power is not lower than 500W; the micro-regulating valve is connected with an inlet of the oil/gas separator through a pipeline, an outlet of the oil/gas separator is connected to the hydrogen processor, a soap film flowmeter is arranged on a connecting pipeline of the oil/gas separator and the hydrogen processor, and the measuring range of the soap film flowmeter is 0.1-1 ml/min; the hydrogen processor has a hydrogen processing efficiency of 100%.
Further, the invention relates to an intermittent preparation device of the nano hydrogen bubble/diesel oil mixed fuel, wherein the interface of the mixer is a stainless steel pipe with the inner diameter of 4-6 mm; the mixer is cylindrical in shape; the oil filling port is a stainless steel pipe with the inner diameter of 5-15 mm, and the stirrer is a common magnetic stirrer; the oil drain valve is a ball valve with the inner diameter of 10-20 mm.
The pressure resistance of the sealing rubber gasket is more than 5 MPa.
The intermittent preparation device of the nano hydrogen bubble/diesel oil mixed fuel can generate hydrogen bubbles with nanometer diameters and mix the hydrogen bubbles with diesel oil to form uniform mixed fluid according to the following preparation method, and the preparation method comprises the following steps:
step one, adding diesel oil into the mixer from an oil filling port, requiring the space in the mixer to be completely filled with the diesel oil without gas residue, and sealing the oil filling port by using a sealing plug;
supplying hydrogen to the mixer at a preset constant pressure within the range of 0.5-5 MPa from the hydrogen cylinder through a hydrogen pressure reducing valve, a secondary pressure regulator and a mixer interface in sequence;
turning on a magnetic stirring heater, adjusting the rotating speed of a stirrer to a preset constant rotating speed within the range of 1-5 revolutions per second, adjusting the temperature of diesel oil in a mixer to a preset constant temperature within the range of room temperature-150 ℃, and stirring for 30-120 min;
step four, after the stirring process is finished, closing the hydrogen cylinder, the hydrogen pressure reducing valve and the secondary pressure regulator, slowly opening the micro-regulating valve, regulating the gas flow rate in the soap film flowmeter to be a preset constant flow rate within the range of 0.1-1 ml/min, and releasing diesel oil and hydrogen overflowing from the mixer; and when the pressure value of the pressure gauge is recovered to the normal pressure, the sealing plug is taken down, the oil drain valve is opened, and the fluid released from the oil drain valve is the nano hydrogen bubble/diesel oil mixed fuel.
Furthermore, in the fourth step of the intermittent preparation method of the nano hydrogen bubble/diesel oil mixed fuel, a small amount of diesel oil and hydrogen overflow from the micro regulating valve when the micro regulating valve is slowly opened, the overflowed diesel oil and hydrogen flow to the oil/gas separator for separation, the separated diesel oil is stored in the oil/gas separator, and the separated hydrogen overflows from the oil/gas separator and enters a hydrogen processor for harmless treatment after passing through a soap film flowmeter.
The nano hydrogen bubble/diesel mixed fuel prepared by the preparation method of the nano hydrogen bubble/diesel mixed fuel is combusted on a diesel engine, so that the substitution of the diesel fuel and the clean and efficient combustion of the diesel engine are realized.
Compared with the prior art, the invention has the beneficial effects that:
when the nano hydrogen bubble/diesel oil mixed fuel is applied, the diesel engine only needs one set of oil supply system, and hardware of the oil supply system is not required to be adjusted; the nano hydrogen bubble/diesel oil mixed fuel for the combustion of the diesel engine can greatly improve the thermal efficiency of the diesel engine, improve the fuel economy and reduce the pollutant discharge amount of the diesel engine; the renewable energy hydrogen is adopted to partially replace fossil fuel diesel, which is beneficial to alleviating the increasingly severe petroleum supply situation of China and ensuring the energy safety of China.
In addition, the hydrogen bubbles with nanometer-level diameters can be generated by adopting a supersaturated solution phase separation bubble generation method, so that the combustion performance of the mixed fuel on a diesel engine is improved, and the hydrogen bubbles can stably exist for a long time; the hydrogen can be fully dissolved in the diesel oil by stirring for a long time, and unstable micron-sized large hydrogen bubbles can not be formed in the hydrogen gas inlet process to deteriorate the uniformity and stability of the nano hydrogen bubble/diesel oil mixed fuel.
Drawings
FIG. 1 is a schematic diagram of a nano hydrogen bubble/diesel oil mixed fuel preparation device used in the present invention.
Wherein: 1-hydrogen gas cylinder; 2-a hydrogen pressure reducing valve; 3-a secondary pressure regulator; 4-mixer interface; 5-a mixer; 6-sealing the rubber gasket; 7-mixer top cover; 8-oil filler; 9-sealing the plug; 10-pressure gauge; 11-safety valve; 12-micro-regulating valve; 13-oil/gas separator; 14-soap film flow meter; 15-a hydrogen processor; 16-a stirrer; 17-a fuel drain valve; 18-magnetic stirring heater.
FIG. 2 shows the distribution rule of diameters of nano hydrogen bubbles in the nano hydrogen bubble/diesel oil mixed fuel obtained by the preparation apparatus and the preparation steps described in example 1.
Detailed Description
The technical solution of the present invention is further described below by specific examples in conjunction with the accompanying drawings. It should be noted that the present embodiments are illustrative and not restrictive, and the present invention is not limited to the following embodiments.
The constitution of the nano hydrogen bubble/diesel oil mixed fuel preparation device provided by the invention is shown in figure 1, and the preparation device comprises a hydrogen cylinder 1, a mixer 5, an oil/gas separator 13 and a hydrogen processor 15; a hydrogen pressure reducing valve 2, a secondary pressure regulator 3 and a mixer connector 4 are arranged on an air inlet pipeline of the hydrogen cylinder 1 connected to the mixer 5, a mixer top cover 7 is arranged at the top of the mixer 5, a sealing rubber gasket 6 is arranged between the mixer 5 and the mixer top cover 7, an oil filling port 8, a sealing plug 9, a pressure gauge 10 and a micro-regulating valve 12 are arranged at the top of the mixer top cover 7, an oil drain valve 17 is arranged at the bottom of the mixer 5, and a stirrer 16 is arranged in the mixer 5; a magnetic stirring heater 18 is arranged below the mixer 5; the micro-regulating valve 12 is connected with an inlet of the oil/gas separator 13 through a pipeline, an outlet of the oil/gas separator 13 is connected with the hydrogen processor 15, and a soap film flowmeter 14 is arranged on a connecting pipeline of the oil/gas separator 13 and the hydrogen processor 15.
In addition, the mixer top cover 7 and the mixer 5 are connected together by bolts after being sealed by a sealing rubber gasket 6; a safety valve 11 for safety protection is mounted on the mixer top cover 7.
The basic requirements of the various components of an embodiment of the production apparatus of the present invention are as follows:
the hydrogen cylinder 1 adopts a common hydrogen cylinder; the maximum output pressure of the hydrogen pressure reducing valve 2 is more than 5 MPa; pressure regulation range of the secondary pressure regulator 3: 0-5 MPa; the mixer connector 4 is made of stainless steel, and the inner diameter of the mixer connector is 4-6 mm; the mixer 5 is made of stainless steel, has a volume of 0.1-10L and is cylindrical; the pressure resistance of the sealing rubber gasket 6 is more than 5 MPa; the mixer top cover 7 is made of stainless steel, and the outer diameter of the mixer top cover is the same as that of the mixer 5; the oil filling port 8 is made of a stainless steel pipe, and the inner diameter is 5-15 mm; the sealing plug 9 is made of stainless steel; the pressure measuring range of the pressure gauge 10 is 0-5 MPa; the opening pressure of the safety valve 11 is 5 MPa; the micro-regulating valve 12 is made of stainless steel; the material of the oil/gas separator 13 is stainless steel; the measuring range of the soap film flowmeter 14 is 0.1-1 ml/min; the hydrogen treatment efficiency of the hydrogen processor 15 is 100%; the stirrer 16 adopts a common magnetic stirrer; the oil drain valve 17 is a ball valve made of stainless steel and having an inner diameter of 10-20 mm; the maximum rotating speed of the magnetic stirring heater 18 is not lower than 5 r/s, and the maximum heating power is not lower than 500W.
The preparation method of the nano hydrogen bubble/diesel oil mixed fuel by using the preparation device comprises the following steps:
adding diesel oil into the mixer 5 from an oil filling port 8 on a mixer top cover 7, wherein the space in the mixer 5 is required to be completely filled with the diesel oil without gas residue, and sealing the oil filling port 8 by using a sealing plug 9; hydrogen is supplied to a mixer 5 from a hydrogen cylinder 1 through a hydrogen pressure reducing valve 2, a secondary pressure regulator 3 and a mixer interface 4 in sequence at a preset constant pressure within the range of 0.5-5 MPa; turning on a magnetic stirring heater 18, adjusting the rotating speed of a stirrer 16 to a preset constant rotating speed within the range of 1-5 revolutions per second, adjusting the temperature of diesel oil in a mixer 5 to a preset constant temperature within the range of room temperature-150 ℃, and stirring for 30-120 min; after the stirring process is finished, closing the hydrogen cylinder 1, the hydrogen pressure reducing valve 2 and the secondary pressure regulator 3, slowly opening the micro-regulating valve 12, regulating the gas flow rate in the soap film flowmeter 14 to a preset constant flow rate within the range of 0.1-1 ml/min, and releasing diesel oil and hydrogen overflowing from the mixer 5; and (3) when the pressure value of the pressure gauge 10 is recovered to the normal pressure, taking down the sealing plug 9, opening the oil drain valve 17, and obtaining the fluid released from the oil drain valve 17 as the nano hydrogen bubble/diesel oil mixed fuel.
When the micro-regulating valve 12 is slowly opened, a small amount of diesel oil and hydrogen overflow from the mixer 5 through the micro-regulating valve 12, the overflow diesel oil and hydrogen flow into the oil/gas separator 13 to be separated, the separated diesel oil is directly stored in the oil/gas separator 13, and the separated hydrogen overflows from the oil/gas separator 13 and enters the hydrogen processor 15 for harmless treatment after passing through the soap film flowmeter 14.
Example 1
Selecting a mixer 5 with a volume of 0.5L; adding 0.5L diesel oil into the mixer 5 from an oil filling port 8 with the inner diameter of 5mm on the top cover 7 of the mixer, completely filling the space in the mixer 5 with the diesel oil without gas residue, and sealing the oil filling port 8 by using a sealing plug 9; hydrogen with 0.5MPa constant pressure is supplied to a mixer 5 from a hydrogen bottle 1 through a hydrogen pressure reducing valve 2, a secondary pressure regulator 3 and a mixer interface 4 with the inner diameter of 4 mm; turning on the magnetic stirring heater 18, adjusting the rotating speed of the stirrer 16 to 1 r/s, adjusting the temperature of the diesel oil in the mixer 5 to a constant temperature of 50 ℃, and stirring for 60 min; after the stirring process is finished, closing the hydrogen cylinder 1, the hydrogen pressure reducing valve 2 and the secondary pressure regulator 3, slowly opening the micro-regulating valve 12, regulating the gas flow in the soap film flowmeter 14 to be 0.5ml/min, and releasing diesel oil and hydrogen overflowing from the mixer 5 through the micro-regulating valve 12; when the pressure value of the pressure gauge 10 is recovered to the normal pressure, the sealing plug 9 is taken down, and the oil drain valve 17 with the inner diameter of 10mm is opened; the fluid released from the oil drain valve 17 is the nano hydrogen bubble/diesel oil mixed fuel.
The hydrogen bubble diameter distribution of the nano hydrogen bubble/diesel oil mixed fuel prepared in example 1 was measured using a ZS 90 type laser nano particle size analyzer manufactured by marvens corporation, and the result is shown in fig. 2.
Example 2
Selecting a mixer 5 with a volume of 1L; 1L of diesel oil is added into the mixer 5 from an oil filling port 8 with the inner diameter of 10mm on a top cover 7 of the mixer, the space in the mixer 5 is completely filled with the diesel oil without gas residue, and the oil filling port is sealed by a sealing plug 9; hydrogen with 2MPa constant pressure is supplied to a mixer 5 from a hydrogen bottle 1 through a hydrogen pressure reducing valve 2, a secondary pressure regulator 3 and a mixer interface 4 with the inner diameter of 5 mm; turning on the magnetic stirring heater 18, adjusting the rotating speed of the stirrer 16 to 3 revolutions per second, adjusting the temperature of the diesel oil in the mixer 5 to a constant temperature of 100 ℃, and stirring for 30 min; after the stirring process is finished, closing the hydrogen cylinder 1, the hydrogen pressure reducing valve 2 and the secondary pressure regulator 3, slowly opening the micro-regulating valve 12, regulating the gas flow in the soap film flowmeter 14 to be 0.1ml/min, and releasing diesel oil and hydrogen overflowing from the mixer 5 through the micro-regulating valve 12; when the pressure value of the pressure gauge 10 is recovered to the normal pressure, the sealing plug 9 is taken down, and the oil drain valve 17 with the inner diameter of 15mm is opened; the fluid released from the oil drain valve 17 is the nano hydrogen bubble/diesel oil mixed fuel.
Example 3
Selecting a mixer 5 with a volume of 5L; 5L of diesel oil is added into the mixer 5 from an oil filling port 8 with the inner diameter of 15mm on the top cover 7 of the mixer, the space in the mixer 5 is completely filled with the diesel oil without gas residue, and the oil filling port 8 is sealed by a sealing plug 9; hydrogen with 4MPa constant pressure is supplied to a mixer 5 from a hydrogen bottle 1 through a hydrogen pressure reducing valve 2, a secondary pressure regulator 3 and a mixer interface 4 with the inner diameter of 6 mm; turning on the magnetic stirring heater 18, adjusting the rotating speed of the stirrer 16 to 5 revolutions per second, adjusting the temperature of the diesel oil in the mixer 5 to a constant temperature of 150 ℃, and stirring for 90 min; after the stirring process is finished, closing the hydrogen cylinder 1, the hydrogen pressure reducing valve 2 and the secondary pressure regulator 3, slowly opening the micro-regulating valve 12, regulating the gas flow in the soap film flowmeter 14 to be 1ml/min, and releasing diesel oil and hydrogen overflowing from the mixer 5 through the micro-regulating valve 12; when the pressure value of the pressure gauge 10 is recovered to the normal pressure, the sealing plug 9 is taken down, and the oil drain valve 17 with the inner diameter of 20mm is opened; the fluid released from the oil drain valve 17 is the nano hydrogen bubble/diesel oil mixed fuel.
Example 4
Selecting a mixer 5 with a volume of 0.1L; adding 0.1L diesel oil into the mixer 5 from an oil filling port 8 with the inner diameter of 5mm on a top cover 7 of the mixer, completely filling the space in the mixer 5 with the diesel oil without gas residue, and sealing the oil filling port 8 by using a sealing plug 9; hydrogen with 5MPa constant pressure is supplied to a mixer 5 from a hydrogen bottle 1 through a hydrogen pressure reducing valve 2, a secondary pressure regulator 3 and a mixer interface 4 with the inner diameter of 4 mm; turning on the magnetic stirring heater 18, adjusting the rotating speed of the stirrer 16 to 1 r/s, keeping the temperature of the diesel oil in the mixer 5 at room temperature, and stirring for 120 min; after the stirring process is finished, closing the hydrogen cylinder 1, the hydrogen pressure reducing valve 2 and the secondary pressure regulator 3, slowly opening the micro-regulating valve 12, regulating the gas flow in the soap film flowmeter 14 to be 0.1ml/min, and releasing diesel oil and hydrogen overflowing from the mixer 5 through the micro-regulating valve 12; when the pressure value of the pressure gauge 10 is recovered to the normal pressure, the sealing plug 9 is taken down, and the oil drain valve 17 with the inner diameter of 10mm is opened; the fluid released from the oil drain valve 17 is the nano hydrogen bubble/diesel oil mixed fuel.
The preparation method can prepare the hydrogen bubble/diesel oil mixed fuel with the hydrogen bubble diameter at the nanometer level and the stable period of more than 6 months, can be directly used for a diesel engine to replace pure diesel oil fuel, and realizes the replacement of the diesel oil fuel and the clean and efficient combustion of the diesel engine. When the nano hydrogen bubble/diesel oil mixed fuel is applied, only one set of oil supply system is needed for the diesel engine, and the hardware of the oil supply system is not needed to be adjusted; the nano hydrogen bubble/diesel oil mixed fuel for the diesel engine can greatly improve the fuel economy of the diesel engine and reduce the pollutant emission. In addition, the hydrogen bubbles with nanometer-level diameters can be prepared by adopting a supersaturated solution phase separation method, so that the combustion performance of the mixed fuel on a diesel engine is improved, and the hydrogen bubbles can stably exist for a long time; the stirring method is adopted to promote the hydrogen to be fully dissolved in the diesel oil, so that the generation of large bubbles in the mixing process is avoided, and the uniformity and the stability of the nano hydrogen bubble/diesel oil mixed fuel are ensured.
While the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are illustrative only and not restrictive, and various modifications which do not depart from the spirit of the present invention and which are intended to be covered by the claims of the present invention may be made by those skilled in the art.
Claims (6)
1. An intermittent preparation device of nano hydrogen bubble/diesel oil mixed fuel comprises a hydrogen cylinder (1), a mixer (5), an oil/gas separator (13) and a hydrogen processor (15); the method is characterized in that:
a hydrogen pressure reducing valve (2), a secondary pressure regulator (3) and a mixer interface (4) are arranged on an air inlet pipeline of the hydrogen cylinder (1) connected to the mixer; the maximum output pressure of the hydrogen pressure reducing valve (2) is greater than 5 MPa; the pressure regulation range of the secondary pressure regulator (3): 0-5 MPa; the volume of the mixer (5) is 0.1-10L;
a mixer top cover (7) is arranged at the top of the mixer (5), a sealing rubber gasket (6) is arranged between the mixer (5) and the mixer top cover (7), and an oil filling port (8), a sealing plug (9), a pressure gauge (10), a safety valve (11) and a micro-regulating valve (12) are arranged on the mixer top cover (7); the pressure measuring range of the pressure gauge (10) is 0-5 MPa; the opening pressure of the safety valve (11) is 5 MPa; an oil drain valve (17) is arranged at the bottom of the mixer (5), and a stirrer (16) is arranged in the mixer (5); a magnetic stirring heater (18) is arranged below the mixer (5), the maximum rotating speed of the magnetic stirring heater (18) is not lower than 5 revolutions per second, and the maximum heating power is not lower than 500W; the micro-regulating valve (12) is connected with an inlet of the oil/gas separator (13) through a pipeline, an outlet of the oil/gas separator (13) is connected to the hydrogen processor (15), a soap film flowmeter (14) is arranged on a connecting pipeline of the oil/gas separator (13) and the hydrogen processor (15), and the measuring range of the soap film flowmeter (14) is 0.1-1 ml/min; the hydrogen processor (15) has a hydrogen processing efficiency of 100%.
2. The batch-type preparation device of nano hydrogen bubble/diesel oil mixed fuel according to claim 1, characterized in that: the mixer connector (4) is a stainless steel pipe with the inner diameter of 4-6 mm; the mixer (5) is cylindrical in shape; the oil filling port (8) is a stainless steel pipe with the inner diameter of 5-15 mm, and the stirrer (16) is a common magnetic stirrer; the oil drain valve (17) is a ball valve with the inner diameter of 10-20 mm.
3. The batch-type preparation device of nano hydrogen bubble/diesel oil mixed fuel according to claim 1, characterized in that: the pressure resistance of the sealing rubber gasket (6) is more than 5 MPa.
4. An intermittent preparation method of a nano hydrogen bubble/diesel oil mixed fuel is characterized in that: a batch-type production apparatus using the nano hydrogen bubble/diesel hybrid fuel according to any one of claims 1 to 3, and comprising the steps of:
step one, adding diesel oil into the mixer (5) from the oil filling port (8) to ensure that the space in the mixer (5) is completely filled with the diesel oil without gas residue, and sealing the oil filling port (8) by using a sealing plug (9);
step two, supplying hydrogen to a mixer (5) by a hydrogen cylinder (1) through a hydrogen pressure reducing valve (2), a secondary pressure regulator (3) and a mixer interface (4) in sequence at a preset constant pressure within the range of 0.5-5 MPa;
step three, turning on a magnetic stirring heater (18), adjusting the rotating speed of a stirrer (16) to a preset constant rotating speed within the range of 1-5 revolutions per second, adjusting the temperature of diesel oil in a mixer (5) to a preset constant temperature within the range of room temperature-150 ℃, and stirring for 30-120 min;
step four, after the stirring process is finished, closing the hydrogen bottle (1), the hydrogen pressure reducing valve (2) and the secondary pressure regulator (3), slowly opening the micro-regulating valve (12), regulating the preset constant flow rate of the gas flow rate in the soap film flowmeter (14) within the range of 0.1-1 ml/min, and releasing the diesel oil and the hydrogen overflowing from the mixer (5); and (3) when the pressure value of the pressure gauge (10) is recovered to the normal pressure, taking down the sealing plug (9), opening the oil drain valve (17), and obtaining the fluid released from the oil drain valve (17) as the nano hydrogen bubble/diesel oil mixed fuel.
5. The batch preparation method of nano hydrogen bubble/diesel oil mixed fuel according to claim 4, characterized in that, in the fourth step, while slowly opening the micro-regulating valve (12), a small amount of diesel oil and hydrogen gas overflow from the micro-regulating valve (12), the overflow diesel oil and hydrogen gas flow into the oil/gas separator (13) for separation, the separated diesel oil is stored in the oil/gas separator (13), and the separated hydrogen gas overflows from the oil/gas separator (13) and enters the hydrogen gas processor (15) for harmless treatment after passing through the soap film flowmeter (14).
6. The application of the nano hydrogen bubble/diesel oil mixed fuel is characterized in that: the nano hydrogen bubble/diesel oil mixed fuel prepared by the preparation method according to claim 4 by using the batch preparation device of the nano hydrogen bubble/diesel oil mixed fuel according to any one of claims 1 to 3 is directly used as diesel fuel.
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| CN110240952B true CN110240952B (en) | 2020-11-20 |
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| CN111763544B (en) * | 2020-07-11 | 2021-09-24 | 天津大学 | Spray type nano hydrogen bubble/diesel oil mixed fuel preparation device and method and application |
| CN111763543B (en) * | 2020-07-11 | 2021-08-10 | 天津大学 | Compressed nano hydrogen bubble/diesel oil mixed fuel preparation device and method and use |
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| CN1296151A (en) * | 2000-10-16 | 2001-05-23 | 郝一生 | Gas and oil mixed fuel and special making equipment thereof |
| JP2010048543A (en) * | 2008-07-24 | 2010-03-04 | Device:Kk | Hydrogen-dissolved fuel |
| CN206801725U (en) * | 2017-03-20 | 2017-12-26 | 帅汽（上海）新能源科技有限公司 | A kind of bavin hydrogen blender |
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