CN117588746A - Device and method for stable continuous combustion of nanofluid fuel - Google Patents
Device and method for stable continuous combustion of nanofluid fuel Download PDFInfo
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- CN117588746A CN117588746A CN202311646723.4A CN202311646723A CN117588746A CN 117588746 A CN117588746 A CN 117588746A CN 202311646723 A CN202311646723 A CN 202311646723A CN 117588746 A CN117588746 A CN 117588746A
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- fuel
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- nanofluid
- pipeline
- nano
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- 239000000446 fuel Substances 0.000 title claims abstract description 55
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000012530 fluid Substances 0.000 claims abstract description 49
- 239000000919 ceramic Substances 0.000 claims abstract description 23
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 239000000443 aerosol Substances 0.000 claims description 9
- 238000000889 atomisation Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 230000002035 prolonged effect Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000002604 ultrasonography Methods 0.000 claims description 3
- 238000009841 combustion method Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 19
- 239000007788 liquid Substances 0.000 abstract description 11
- 239000012159 carrier gas Substances 0.000 abstract description 9
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 abstract description 4
- 239000005977 Ethylene Substances 0.000 abstract description 4
- 238000009792 diffusion process Methods 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 238000012795 verification Methods 0.000 abstract 2
- 239000002105 nanoparticle Substances 0.000 description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 230000003993 interaction Effects 0.000 description 4
- 239000004071 soot Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 210000003739 neck Anatomy 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/34—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by ultrasonic means or other kinds of vibrations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/36—Details, e.g. burner cooling means, noise reduction means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses a device and a method for stable continuous combustion of nanofluid fuel. The invention specifically discloses a three-opening straight-neck three-neck flask, wherein an electrically-driven piezoelectric ceramic oscillating piece is arranged in the flask, a small ultrasonic device is arranged outside the flask, nano fluid fuel is introduced into the flask from a constant flow rate through a syringe pump, and the ultrasonic action of the piezoelectric ceramic oscillating piece breaks the nano fluid fuel into stable micron liquid drop groups. The nano fluid atomized gas is carried out by inert carrier gas with fixed flow rate and enters a combustor to be ignited, so that the aim of obtaining stable flame of nano fluid fuel is fulfilled, and meanwhile, an external small ultrasonic device is opened when nano fluid is atomized for a long time, so that the stability of the nano fluid is ensured. According to the invention, the atomized nanofluid fuel is subjected to combustion characteristic verification in the ethylene forward diffusion flame, and through experimental verification, the method effectively enables the nanofluid fuel to be stably and continuously combusted.
Description
Technical Field
The invention belongs to the technical field of combustion, and particularly relates to a device and a method for stably and continuously combusting nanofluid fuel.
Background
Nanofluids refer to uniform, stable suspensions prepared by dispersing small amounts of metallic or non-metallic nanoparticles into a conventional liquid medium. The nano particles are added into the traditional liquid fuel, so that the volume energy density and the combustion rate of the traditional fuel can be improved, and the nano particles are used as catalysts, so that the emission of gas pollutants such as carbon smoke particles, nitrogen oxides and the like can be reduced. Therefore, the nano fluid fuel is expected to become a new fuel of the next generation, and energy conservation and emission reduction are realized.
Soot is a fine particulate matter which is harmful to both the environment and the human body, and it is very necessary to intensively study its formation properties and how to control its formation process. In the combustion process, incomplete combustion generates a large amount of soot, which not only affects combustion efficiency, but also causes harm to the environment and human body when discharged into the atmosphere.
The nano particles suspended in the nano fluid are easy to generate oxidation reaction in the combustion process of the nano fluid fuel, compared with Yu Chunji liquid fuel, the nano particles can generate interaction between soot in the combustion process, and a large amount of continuous collection and analysis of solid residues generated in combustion are of great significance in analyzing the interaction between the nano particles and the soot particles in the combustion process of the nano fluid fuel, and meanwhile, the research of the synergistic effect of the nano particles and the base liquid is promoted.
Most researchers in recent years have focused on enhanced heat transfer and relatively little research has been done on nanofluid combustion. The research object of the nano-fluid fuel combustion is concentrated on single liquid drops and liquid drop groups, and in practical application, the nano-fluid fuel is carried out in a continuous combustion mode instead of single liquid drops. The limitation of the combustion method prevents the research progress of the nanofluid in the combustion field to a certain extent, and the combustion mechanism of the nanofluid fuel is not perfect, so that the continuous combustion process of the nanofluid fuel is explored from the basic angle, and the method has important theoretical significance and practical value.
Disclosure of Invention
The invention aims to provide a device and a method for stably and continuously combusting nanofluid fuel. The method can be used for researching an interaction mechanism between nano particles and carbon smoke particles in continuous stable combustion of the nano fluid fuel.
The method can enable the nanofluid fuel to form stable and continuous flame, and the ultrasonic action of the piezoelectric ceramic oscillating piece breaks the nanofluid fuel into stable micron liquid drop groups. The nano fluid atomized gas is carried out by inert carrier gas with fixed flow rate and enters a burner to be ignited, so that the aim of obtaining stable flame of nano fluid fuel is fulfilled.
A method for stably and continuously combusting nanofluid fuel comprises the following specific steps of:
step 1: placing the three-mouth flask in a small ultrasonic device, placing a piezoelectric ceramic vibrating piece in the three-mouth flask, and arranging three rubber plugs connected with pipelines to block the mouth of the flask, so as to avoid interference of external gas inflow on atomization and combustion of nano fluid;
step 2: injecting nano fluid into the flask by using an injection pump, wherein the nano fluid enters the three-neck flask through a rubber plug of a connecting pipeline and is continuously accumulated in the flask;
step 3: the piezoelectric ceramic oscillating piece is electrified when the nano fluid fuel is filled to the lower edge, and opens the carrying gas, the carrying gas enters the three-neck flask from the rubber plug of the connecting pipeline, and the nano fluid fuel atomized gas enters the burner for burning from the rubber plug of the other connecting pipeline;
step 4: and the device is kept stable in the sampling process, so that flame disturbance is avoided.
Further, in the step 1, the pipeline connected with the injection pump is ensured to be prolonged and placed below the lower edge of the piezoelectric ceramic oscillating piece in the three-neck flask, and the carrying gas pipeline and the pipeline connected with the burner are required to be flush with the lower edge of the rubber plug.
Further, in the step 1, the selected rubber plug or the rubber ring is ensured to completely block the flask mouth so as to isolate the external air and prevent the leakage of the nano fluid atomized gas.
Further, in the step 1, the output of the nano fluid aerosol of the piezoelectric ceramic oscillating piece is ensured to be larger than the carrying air flow so as to ensure balance of part of aerosol.
Further, in step 2, the feeding speed of the injection pump should be consistent with the atomizing speed of the piezoelectric ceramic oscillating piece.
Further, in step 2, the small-sized ultrasonic device should be kept on to ensure the stability of the nanofluid in the atomizing device.
Further, in the step 2, the liquid level of the ultrasonic medium in the small ultrasonic device is ensured to be higher than the nano fluid page in the three-mouth flask.
The present invention provides an apparatus for a method of stable continuous combustion of nanofluid fuels, the apparatus comprising:
a miniature ultrasound device; the method is used for keeping the nano-fluid fuel stable for a long time and avoiding flame disturbance caused by non-uniformity of the nano-fluid;
a straight neck three-neck flask; is a closed container and is used for generating and storing ultrasonic atomization of nano fluid fuel;
a rubber plug connected with a pipeline; the passageway is used for connecting the carrying gas with the three-neck flask and is used for introducing the carrying gas into the three-neck flask;
a rubber plug connected with a pipeline; the passage is used for carrying gas to carry the nano-fluid aerosol atomized gas into the burner for combustion;
a rubber plug connected with a pipeline; the passage is used for connecting the injection pump and the three-neck flask and injecting the nano fluid into the three-neck flask by the injection pump;
piezoelectric ceramic oscillating piece; for generating nanofluidic fuel aerosols.
Compared with the prior art, the invention has the following advantages: (1) The method can obtain a stable nanofluid flame for a long time; (2) Changing the quantity of atomized liquid by changing the quantity of piezoelectric ceramic oscillating pieces; (3) Ensuring that the nano fluid fuel is stable for a long time; (4) Is suitable for different flow rates of carrying gases and nano fluid types.
The invention is further described below with reference to the drawings.
Drawings
Fig. 1 is an assembly view of the system of the present invention.
Fig. 2 is a diagram of the system components of the present invention.
Fig. 3 is a cross-sectional view of the atomizing device of the present invention.
FIG. 4 is a graph of flame burn using aluminum/ethanol nanofluids in different carrier gas flow rates for ethylene forward diffusion support flames in accordance with the present invention; wherein (a) - (e) are combustion images with a carrier gas flow rate of 500-900ml, respectively, the carrier gas flow rate varying to 100ml.
FIG. 5 is a graph of unstable nanofluidic flames that may be generated when the method of the present invention is improperly used.
Detailed Description
The invention will now be described in detail with reference to the accompanying drawings and specific embodiments thereof. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention will be further described by taking an example of an aluminum/ethanol nanofluidic fuel forming a flame under an ethylene-supported flame.
A device and a method for stable continuous combustion of nanofluid fuel comprise a nanofluid fuel atomization generating device and a miniature ultrasonic device. The following description is made with reference to fig. 1, 2, 3, 4, and 5.
As shown in fig. 1, 2 and 3, the atomizing device is composed of a straight-neck three-neck flask 2, a rubber plug 3 connected with a pipeline, a rubber plug 4 connected with a pipeline, a rubber plug 5 connected with a pipeline and a piezoelectric ceramic vibration piece 6. When in use, the piezoelectric ceramic vibrating piece 6 is placed in the straight-neck three-neck flask 2, the diameter of the piezoelectric ceramic vibrating piece 6 is 16mm, the vibration frequency is 108-110KHz, and the atomization rate is 20ml/h; the three-necked flask had a capacity of 50ml and a neck of 19/26mm. The three necks of the three-neck flask are respectively sealed by a rubber plug 3 connected with a pipeline, a rubber plug 4 connected with a pipeline and a rubber plug 5 connected with a pipeline so as to isolate external air and prevent the device from leaking air. Wherein, the pipeline of rubber buffer 3 and rubber buffer 4 is parallel and level with rubber buffer lower limb, and the pipeline of rubber buffer 5 should be enough to insert to piezoceramics vibration piece below. The rubber stopper 3, the rubber stopper 4 and the rubber stopper 5 are matched with a 19/26mm flask in size, an upper pipeline is positioned in the center of the rubber stopper, and the diameter of the pipeline is 6mm outside and 4mm inside.
The atomizing device is arranged in a small-sized ultrasonic device 1 containing water, a pipeline of a rubber plug 3 connected with a pipeline is connected with a carrier gas, a pipeline of a rubber plug 4 connected with the pipeline is connected with a burner, and a pipeline of a rubber plug 5 connected with the pipeline is connected with a syringe pump containing nano fluid. The ultrasonic frequency of the miniature ultrasonic device is 48KHz.
An apparatus and method for stable continuous combustion of nanofluid fuels. The method comprises the following specific steps of:
step 1: placing the three-neck flask 2 in a small ultrasonic device, placing the piezoelectric ceramic oscillating piece 6 in the three-neck flask, and arranging three rubber plugs 3, 4 and 5 connected with pipelines to block the flask mouth, so as to avoid interference to atomization and combustion of nano fluid caused by inflow of external gas; in the step 1, the pipeline connected with the injection pump is prolonged and placed at the bottom of the three-neck flask, and the carrying gas pipeline and the connecting burner pipeline are flush with the lower part of the rubber plug. In the step 1, a rubber plug is selected or a rubber ring is used for completely blocking the flask mouth, so that the inside of the atomizing device is not communicated with the outside except for a pipeline.
Step 2: injecting nano fluid into the flask by using an injection pump, wherein the nano fluid enters the three-neck flask 2 from the rubber plug 5 of the connecting pipeline, and the nano fluid fuel is filled into the piezoelectric ceramic oscillating piece; in the step 2, the feeding speed of the injection pump is the same as the atomizing speed of the piezoelectric ceramic oscillating piece 6; in step 2, the miniature ultrasound device 1 is turned on to ensure the stability of the nanofluid in the atomizing device.
Step 3: the piezoelectric ceramic oscillating piece 6 is electrified when the nano fluid fuel is filled to the lower edge, and opens the carrying gas, the carrying gas enters the three-neck flask 2 from the rubber plug 3 of the connecting pipeline, and the nano fluid fuel atomized gas is carried into the burner from the rubber plug 4 of the connecting pipeline for burning;
step 4: and the device is kept stable in the sampling process, so that flame disturbance is avoided.
FIG. 4 is a flame burn diagram of the process of the present invention using 2.5wt.% aluminum/ethanol nanofluids with different carrier gas flow rates of ethylene forward diffusion support flames. Wherein (a) - (e) are combustion images with a carrier gas flow rate of 500-900ml, respectively, the carrier gas flow rate varying to 100ml. As can be seen from the figure: the method can continuously stabilize the nano fluid fuel flame under the ethylene supporting flame, so that the device is used for carrying out the related research on the interaction between nano particles and carbon smoke under the continuous stable combustion of the nano fluid fuel.
As an alignment, figure 5 is an unstable nanofluidic flame generated when the present invention is partially used improperly. Namely, (a) - (e) are flame unstable combustion pictures which possibly appear when the output of the nano-fluid aerosol of the piezoelectric ceramic vibrating piece is smaller than the carrying air flow, and are characterized by the upper limit jumping of the flame periodicity.
The foregoing has outlined and described the basic principles, features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The method for stably and continuously burning the nanofluid fuel is characterized by comprising the following specific steps of:
step 1: placing the three-mouth flask in a small ultrasonic device, placing a piezoelectric ceramic vibrating piece in the three-mouth flask, and arranging three rubber plugs connected with pipelines to block the flask mouth;
step 2: injecting nano fluid into the flask by using an injection pump, wherein the nano fluid enters the three-neck flask through a rubber plug of a connecting pipeline and is continuously accumulated in the flask;
step 3: the piezoelectric ceramic oscillating piece is electrified when the nano fluid fuel is filled to the lower edge, and opens the carrying gas, the carrying gas enters the three-neck flask from the rubber plug of the connecting pipeline, and the nano fluid fuel atomized gas enters the burner for burning from the rubber plug of the other connecting pipeline;
step 4: and the device is kept stable in the sampling process, so that flame disturbance is avoided.
2. The method for stable continuous combustion of nanofluid fuel according to claim 1, wherein in step 1, it is ensured that the pipeline connected with the injection pump is prolonged below the lower edge of the piezoelectric ceramic oscillating piece in the three-neck flask, and the carrying gas pipeline and the pipeline connected with the burner are flush with the lower edge of the rubber stopper.
3. The method for stable continuous combustion of nanofluid fuel according to claim 1, wherein in step 1, the selected rubber stopper or rubber ring is used to completely block the flask mouth.
4. The method for stable continuous combustion of nanofluid fuel according to claim 1, wherein in step 1, the output of the piezoceramic oscillating piece nanofluid aerosol is ensured to be larger than the carrying air flow so as to ensure balance of part of aerosol.
5. The method for stable continuous combustion of nanofluid fuel according to claim 1, wherein in step 2, the feeding speed of the injection pump is consistent with the atomizing speed of the piezoelectric ceramic oscillating piece.
6. The stable continuous combustion method for nanofluidic fuel according to claim 1, wherein in step 2, the mini-ultrasonic device is kept on.
7. The method for stable continuous combustion of nanofluid fuels according to claim 1, wherein in step 2, the level of the ultrasonic medium in the small ultrasonic device is ensured to be higher than the nanofluid page in the three-neck flask.
8. An apparatus for a nanofluidic fuel stable continuous combustion process according to any one of claims 1-7, the apparatus comprising:
a miniature ultrasound device; the method is used for keeping the nano-fluid fuel stable for a long time and avoiding flame disturbance caused by non-uniformity of the nano-fluid;
a straight neck three-neck flask; is a closed container and is used for generating and storing ultrasonic atomization of nano fluid fuel;
a rubber plug connected with a pipeline; the passageway is used for connecting the carrying gas with the three-neck flask and is used for introducing the carrying gas into the three-neck flask;
a rubber plug connected with a pipeline; the passage is used for carrying gas to carry the nano-fluid aerosol atomized gas into the burner for combustion;
a rubber plug connected with a pipeline; the passage is used for connecting the injection pump and the three-neck flask and injecting the nano fluid into the three-neck flask by the injection pump;
piezoelectric ceramic oscillating piece; for generating nanofluidic fuel aerosols.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311646723.4A CN117588746A (en) | 2023-12-04 | 2023-12-04 | Device and method for stable continuous combustion of nanofluid fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311646723.4A CN117588746A (en) | 2023-12-04 | 2023-12-04 | Device and method for stable continuous combustion of nanofluid fuel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117588746A true CN117588746A (en) | 2024-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311646723.4A Pending CN117588746A (en) | 2023-12-04 | 2023-12-04 | Device and method for stable continuous combustion of nanofluid fuel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117588746A (en) |
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2023
- 2023-12-04 CN CN202311646723.4A patent/CN117588746A/en active Pending
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