Device and method for testing combustion performance of diesel-methanol mixed fuel

Abstract

The invention provides a diesel-methanol mixed fuel combustion performance testing device and method, and relates to the technical field of combustion performance testing. The diesel and methanol mixed fuel combustion performance test device comprises a diesel engine, an oil tank, a water storage tank and a detection structure, the detection structure, the oil tank and the water storage tank are all arranged on the upper end face of the diesel engine, a mixing tank is arranged on one side of the diesel engine, and a first plunger pump is fixedly connected to the center of the upper end face of the mixing tank; the output end of the first plunger pump is connected to the input end of the oil tank, a first storage tank and a second storage tank are transversely arranged at the rear end of the mixing tank, and second plunger pumps are fixedly connected to the centers of the upper end faces of the first storage tank and the second storage tank. Waste gas is cooled in the gas box and then detected, and after detection is finished, the waste gas is filtered by three filter screens in the treatment box and then discharged, so that the environment is prevented from being influenced by direct discharge.

Description

Technical Field

[0001] The present invention relates to the technical field of combustion performance testing, and specifically to a combustion performance test device and method for diesel-methanol blended fuel. Background Art

[0002] Diesel-methanol blended fuel is an alternative fuel formed by mixing methanol and diesel in a certain proportion, aiming to improve combustion efficiency, reduce pollutant emissions and lower fuel costs. Different mixing ratios of diesel and methanol result in different combustion performances. To understand the performance of diesel-methanol blended fuel, a device for testing the combustion performance of diesel-methanol blended fuel is designed, and multiple aspects such as fuel supply, combustion control, performance measurement and data analysis need to be comprehensively considered.

[0003] During the use of existing diesel-methanol blended fuel combustion performance test devices, there are still some problems. After the experiment, the directly discharged exhaust gas is easy to pollute the environment, and when the exhaust gas is discharged, the relatively high temperature is also easy to damage the detection module. Therefore, those skilled in the art have provided a combustion performance test device and method for diesel-methanol blended fuel to solve the problems raised in the above background art. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides a combustion performance test device and method for diesel-methanol blended fuel, which solves the problems that after the experiment, the directly discharged exhaust gas is easy to pollute the environment, and when the exhaust gas is discharged, the relatively high temperature is also easy to damage the detection module.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the present invention is realized through the following technical solutions: A combustion performance test device for diesel-methanol blended fuel includes a diesel engine, a fuel tank, a water storage tank and a detection structure. The detection structure, the fuel tank and the water storage tank are all arranged on the upper end face of the diesel engine. A mixing tank is provided on one side of the diesel engine. A first plunger pump is fixedly connected to the center of the upper end face of the mixing tank. The output end of the first plunger pump is connected to the input end of the fuel tank. A first storage tank and a second storage tank are arranged horizontally at the rear of the mixing tank. A second plunger pump is fixedly connected to the center of the upper end face of each of the first storage tank and the second storage tank. The output ends of the two second plunger pumps both penetrate through the rear end face of the mixing tank and lead to the rear inner wall of the mixing tank;

[0008] The detection structure includes an air box. There is a partition fixedly connected to the lower part inside the air box. The upper end face of the air box is fixedly connected to a treatment box. There is a detection module fixedly connected to the center and rear of the upper inner wall of the air box. There are three sliding grooves arranged vertically inside the treatment box. A bracket is slidably connected to each of the three sliding grooves. A filter screen is provided inside each of the three brackets. The rear ends of the three brackets all penetrate through the rear inner wall of the treatment box and reach the rear end face of the treatment box. On the rear end face of the air box at the lower parts on both sides of the rear end of the bracket, a limiting structure is provided. A smoke exhaust port is provided on the upper end face of the treatment box;

[0009] There is a heat exchange structure on one side of the second storage box at the rear end of the diesel engine. A groove is opened at the lower part of the outer side wall of the mixing box.

[0010] Preferably, the limiting structure includes a connecting column. The connecting column is fixedly connected to the rear end face of the treatment box. A connecting plate is rotatably sleeved on the outer side wall and rear part of the connecting column. At the other end of the front end face of the connecting plate, an electric telescopic rod is fixedly connected. The output end of the electric telescopic rod is fixedly connected to a pressing plate. The pressing plate is attached to the rear end face of the bracket.

[0011] Preferably, the heat exchange structure includes a cold water tank. There is a third plunger pump fixedly connected to the center of the upper end face of the cold water tank. The output end of the third plunger pump is fixedly connected to a first connecting pipe. The first connecting pipe penetrates through one side wall of the air box and reaches the inside of the air box, and the end is fixedly connected to a disc-shaped heat exchange pipe. The output end of the disc-shaped heat exchange pipe penetrates through the rear inner wall of the air box and reaches the rear end of the air box, and the end is fixedly connected to a second connecting pipe. The second connecting pipe leads to the inside of the groove, and the end is fixedly connected to a third spiral heat exchange pipe. The output end of the third spiral heat exchange pipe leads to the rear end of the mixing box, and the end is fixedly connected to a fourth connecting pipe. The output end of the fourth connecting pipe is fixedly connected to a first spiral heat exchange pipe. The output end of the first spiral heat exchange pipe is fixedly connected to a second spiral heat exchange pipe. The first spiral heat exchange pipe and the second spiral heat exchange pipe are respectively sleeved on the output ends of two second plunger pumps. The output end of the second spiral heat exchange pipe is fixedly connected to a third connecting pipe. The output end of the third connecting pipe is fixedly connected to a hot water tank.

[0012] Preferably, a drain valve is fixedly connected to the center and lower part of the rear end face of the hot water tank. An inlet valve is fixedly connected to the center and one side of the upper end face of the cold water tank.

[0013] Preferably, a heat insulation board is fixedly sleeved on the outer side wall of the mixing box outside the groove.

[0014] Preferably, a heating plate is fixedly connected to the lower part of the inner side wall of the mixing box. An ultrasonic emitter is fixedly connected to the center of the lower inner wall of the mixing box.

[0015] Preferably, liquid inlet valves are provided at the rear sides of the upper end faces of the first storage tank and the second storage tank respectively.

[0016] Preferably, the three filter meshes are a diesel particulate filter mesh, an activated carbon filter mesh, and a filter mesh coated with a catalyst respectively.

[0017] A test method for the combustion performance of diesel-methanol blended fuel includes the following steps:

[0018] S1. Preparation before the experiment: Methanol and diesel are respectively added into the first storage tank and the second storage tank through two liquid inlet valves, and cold water is added into the cold water tank through a water inlet valve.

[0019] S2. Mixing: Methanol and diesel are quantitatively transported into the mixing tank by controlling two second plunger pumps respectively, then the heating plate is controlled to start, and methanol and diesel are heated to 45 degrees. Then the ultrasonic emitter is started to mix methanol and diesel. When ultrasonic waves propagate in a liquid, alternating high-pressure and low-pressure regions will be generated. In the low-pressure region, tiny bubbles will form in the liquid. These bubbles quickly collapse in the high-pressure region, generating strong local shock waves and microjets. The microjets and shock waves generated by the cavitation effect can break the interfacial film between methanol and diesel, promoting the mixing of the two, for ten minutes continuously.

[0020] S3. Combustion: The mixed methanol and diesel are transported into the fuel tank by starting the first plunger pump, and the diesel engine is started. The diesel engine burns the methanol and diesel in the fuel tank, and the exhaust gas enters the gas tank through the exhaust pipe.

[0021] S4. Cooling and filtering: By controlling the third plunger pump to start, the third plunger pump transports the cold water in the cold water tank into the first connecting pipe, and then into the disk-shaped heat exchange pipe, to exchange heat with the high temperature in the exhaust gas. The cooled exhaust gas enters the upper part of the gas tank and is detected by the detection module. During the detection process, the exhaust gas enters the treatment box and is filtered through three filter meshes. The diesel particulate filter mesh captures particulate matters in the exhaust gas, including soot and other solid particles, through porous ceramic or metal filter materials. By using the adsorption effect of activated carbon, organic pollutants and some inorganic pollutants in the exhaust gas are removed. A catalyst is coated on the filter material, and through catalytic oxidation reaction, carbon monoxide and unburned hydrocarbons are oxidized into carbon dioxide and water, preventing the discharged exhaust gas from affecting the environment.

[0022] S5. Continuous experiment: The hot water enters the third spiral heat exchange pipe through the second connecting pipe, heats the mixing tank through the third spiral heat exchange pipe. At this time, the use of the heating plate is stopped, and then it is discharged through the third spiral heat exchange pipe and enters the fourth connecting pipe, and then into the first spiral heat exchange pipe and the second spiral heat exchange pipe to preheat the next batch of methanol and diesel entering the mixing tank, and finally enters the hot water tank for storage.

[0023] S6. Cleaning: By controlling the contraction of the electric telescopic rod, the electric telescopic rod drives the pressing plate to move backward, thus releasing the restriction on the bracket. Then, three brackets are pulled out, and the three filter nets are cleaned and replaced. After the replacement is completed, the three brackets are inserted into the three chutes again. The six connecting plates are rotated so that the six pressing plates are located at the rear ends of the three brackets. Then, the six electric telescopic rods are controlled to extend, and the six electric telescopic rods push the six pressing plates to squeeze the three brackets for installation.

[0024] (III) Beneficial Effects

[0025] The present invention provides a device and method for testing the combustion performance of a diesel-methanol blended fuel. It has the following beneficial effects:

[0026] 1. In the present invention, the diesel particle filter captures particulate matter in the exhaust gas, including soot and other solid particles, through a porous ceramic or metal filter material. By using the adsorption effect of activated carbon, organic pollutants and some inorganic pollutants in the exhaust gas are removed. A catalyst is coated on the filter material, and through catalytic oxidation reaction, carbon monoxide and unburned hydrocarbons are oxidized into carbon dioxide and water, preventing the discharged exhaust gas from affecting the environment.

[0027] 2. In the present invention, by controlling the start of the third plunger pump, the third plunger pump transports the cool water in the cold water tank into the first connecting pipe and then into the disc-shaped heat exchange pipe, where it exchanges heat with the high temperature in the exhaust gas to quickly cool the exhaust gas, thereby reducing damage to the detection module caused by high temperature.

[0028] 3. In the present invention, hot water enters the third spiral heat exchange pipe through the second connecting pipe. The third spiral heat exchange pipe heats the mixing tank. At this time, the use of the heating plate is stopped, and ultrasonic transmitters are used for mixing, which improves the mixing efficiency while saving energy consumption. Then, it is discharged through the third spiral heat exchange pipe into the fourth connecting pipe, and then into the first spiral heat exchange pipe and the second spiral heat exchange pipe to preheat the next batch of methanol and diesel entering the mixing tank. Finally, it enters the hot water tank for storage, and the heat energy can also be recovered.

[0029] 4. In the present invention, by controlling the contraction of the electric telescopic rod, the electric telescopic rod drives the pressing plate to move backward, thus releasing the restriction on the bracket. Then, three brackets are pulled out, and the three filter nets are cleaned and replaced. Description of the Drawings

[0030] Figure 1 is a three-dimensional view of the present invention;

[0031] Figure 2 is a three-dimensional view of another perspective of the present invention;

[0032] Figure 3Is a three-dimensional sectional view of the present invention;

[0033] Figure 4 Is a three-dimensional view of the heat exchange structure of the present invention;

[0034] Figure 5 Is a side sectional view of the detection structure of the present invention;

[0035] Figure 6 Is Figure 3 An enlarged schematic view of part A in

[0036] Figure 7 Is a three-dimensional view of the limiting structure of the present invention.

[0037] Wherein, 1. Diesel engine; 2. Detection structure; 201. Air tank; 202. Treatment tank; 203. Partition board; 204. Detection module; 205. Slide groove; 206. Bracket; 207. Filter screen; 208. Smoke exhaust port; 209. Limiting structure; 2091. Connecting column; 2092. Connecting plate; 2093. Electric telescopic rod; 2094. Pressing plate; 3. Heat exchange structure; 301. Cold water tank; 302. Third plunger pump; 303. First connecting pipe; 304. Second connecting pipe; 305. First spiral heat exchange pipe; 306. Second spiral heat exchange pipe; 307. Third connecting pipe; 308. Hot water tank; 309. Drain valve; 310. Disk-shaped heat exchange pipe; 311. Third spiral heat exchange pipe; 312. Fourth connecting pipe; 313. Water inlet valve; 4. Fuel tank; 5. Water storage tank; 6. First plunger pump; 7. First storage tank; 8. Mixing tank; 9. Heat insulation board; 10. Second storage tank; 11. Liquid inlet valve; 12. Second plunger pump; 13. Heating plate; 14. Ultrasonic transmitter; 15. Groove. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Embodiment 1:

[0040] As Figure 1-7As shown in the figure, an embodiment of the present invention provides a combustion performance test device for diesel-methanol blended fuel, which includes a diesel engine 1, a fuel tank 4, a water storage tank 5, and a detection structure 2. The detection structure 2, the fuel tank 4, and the water storage tank 5 are all arranged on the upper end face of the diesel engine 1. There is a mixing tank 8 on one side of the diesel engine 1. At the center of the upper end face of the mixing tank 8, a first plunger pump 6 is fixedly connected. The output end of the first plunger pump 6 is connected to the input end of the fuel tank 4. Horizontally arranged at the back end of the mixing tank 8 are a first storage tank 7 and a second storage tank 10. At the center of the upper end face of each of the first storage tank 7 and the second storage tank 10, a second plunger pump 12 is fixedly connected. The output ends of the two second plunger pumps 12 both pass through the back end face of the mixing tank 8 and lead to the inner back wall of the mixing tank 8.

[0041] The detection structure 2 includes an air box 201. A partition 203 is fixedly connected at a lower position inside the air box 201. A processing box 202 is fixedly connected to the upper end face of the air box 201. A detection module 204 is fixedly connected at a position on the inner upper wall of the air box 201, centered and towards the back. Inside the processing box 202, three sliding grooves 205 are arranged vertically. Inside each of the three sliding grooves 205, a bracket 206 is slidably connected. Inside each of the three brackets 206, a filter screen 207 is arranged. The back ends of the three brackets 206 all pass through the back inner wall of the processing box 202 and lead to the back end face of the processing box 202. On the back end face of the air box 201, at positions on both sides and towards the lower part of the back end of the bracket 206, limiting structures 209 are arranged. A smoke exhaust port 208 is arranged on the upper end face of the processing box 202. The waste gas is cooled inside the air box 201 and then detected. After the detection is completed, it is filtered through the three filter screens 207 inside the processing box 202 and then discharged to prevent direct discharge from affecting the environment.

[0042] There is a heat exchange structure 3 at a position on one side of the second storage tank 10 behind the diesel engine 1. A groove 15 is opened at a lower position on the outer side wall of the mixing tank 8.

[0043] As Figure 2 、 5 As shown in FIGS. 7, the limiting structure 209 includes a connecting column 2091. The connecting column 2091 is fixedly connected to the back end face of the processing box 202. A connecting plate 2092 is rotatably sleeved on the outer side wall of the connecting column 2091, towards the back. At the other end of the front end face of the connecting plate 2092, an electric telescopic rod 2093 is fixedly connected. The output end of the electric telescopic rod 2093 is fixedly connected to a pressing plate 2094. The pressing plate 2094 is attached to the back end face of the bracket 206. By controlling the electric telescopic rod 2093 to contract, the electric telescopic rod 2093 drives the pressing plate 2094 to move backward, thereby releasing the restriction on the bracket 206, and then pulling out the three brackets 206 to clean and replace the three filter screens 207.

[0044] As Figure 1 、 2As shown in FIGS. 3 and 4, the heat exchange structure 3 includes a cold water tank 301. At the center of the upper end face of the cold water tank 301, a third plunger pump 302 is fixedly connected. The output end of the third plunger pump 302 is fixedly connected with a first connecting pipe 303. The first connecting pipe 303 penetrates through a side wall of the gas tank 201 and extends into the interior of the gas tank 201, and the end is fixedly connected with a disc-shaped heat exchange pipe 310. The output end of the disc-shaped heat exchange pipe 310 penetrates through the rear inner wall of the gas tank 201 and extends to the rear end of the gas tank 201, and the end is fixedly connected with a second connecting pipe 304. The second connecting pipe 304 extends into the groove 15, and the end is fixedly connected with a third spiral heat exchange pipe 311. The output end of the third spiral heat exchange pipe 311 extends to the rear end of the mixing tank 8, and the end is fixedly connected with a fourth connecting pipe 312. The output end of the fourth connecting pipe 312 is fixedly connected with a first spiral heat exchange pipe 305. The output end of the first spiral heat exchange pipe 305 is fixedly connected with a second spiral heat exchange pipe 306. The first spiral heat exchange pipe 305 and the second spiral heat exchange pipe 306 are respectively sleeved on the output ends of two second plunger pumps 12. The output end of the second spiral heat exchange pipe 306 is fixedly connected with a third connecting pipe 307. The output end of the third connecting pipe 307 is fixedly connected with a hot water tank 308. By controlling the third plunger pump 302 to start, the third plunger pump 302 transports the cold water inside the cold water tank 301 into the first connecting pipe 303, and then into the disc-shaped heat exchange pipe 310, where it exchanges heat with the high temperature in the waste gas, quickly cools the waste gas, thereby reducing the damage caused by the high temperature to the detection module 204. The hot water enters the third spiral heat exchange pipe 311 through the second connecting pipe 304, heats the mixing tank 8 through the third spiral heat exchange pipe 311, and then is discharged through the third spiral heat exchange pipe 311 and enters the fourth connecting pipe 312, and then enters the first spiral heat exchange pipe 305 and the second spiral heat exchange pipe 306 to preheat the next batch of methanol and diesel entering the mixing tank 8, and finally enters the hot water tank 308 for storage, and can also recover the heat energy.

[0045] A drain valve 309 is fixedly connected to the lower center of the rear end face of the hot water tank 308. An inlet valve 313 is fixedly connected to the side of the upper end face of the cold water tank 301 near the center, which is convenient for adding cold water into the cold water tank 301.

[0046] A heat insulation board 9 is fixedly sleeved on the outer side wall of the mixing tank 8 outside the groove 15 to prevent heat dissipation.

[0047] A heating plate 13 is fixedly connected to the lower part of the inner side wall of the mixing tank 8. An ultrasonic transmitter 14 is fixedly connected to the center of the lower inner wall of the mixing tank 8. The heating plate 13 heats the diesel and methanol, and cooperates with the ultrasonic transmitter 14 for mixing to improve the mixing efficiency.

[0048] On the rear side of the upper end surface of both the first storage tank 7 and the second storage tank 10, a liquid inlet valve 11 is provided, facilitating the addition of diesel and methanol into the first storage tank 7 and the second storage tank 10 respectively through the two liquid inlet valves 11.

[0049] The three filter meshes 207 are respectively a diesel particle filter mesh, an activated carbon filter mesh, and a filter mesh coated with a catalyst. The diesel particle filter mesh captures particulate matters in the exhaust gas, including soot and other solid particles, through porous ceramic or metal filter materials. By using the adsorption effect of activated carbon, organic pollutants and some inorganic pollutants in the exhaust gas are removed. A catalyst is coated on the filter material, and through catalytic oxidation reaction, carbon monoxide and unburned hydrocarbons are oxidized into carbon dioxide and water, preventing the discharged exhaust gas from affecting the environment.

[0050] A test method for the combustion performance of diesel-methanol blended fuel includes the following steps:

[0051] S1. Preparation before the experiment: Methanol and diesel are respectively added into the first storage tank 7 and the second storage tank 10 through the two liquid inlet valves 11, and cold water is added into the cold water tank 301 through the water inlet valve 313.

[0052] S2. Mixing: By controlling the two second plunger pumps 12, methanol and diesel are quantitatively transported into the mixing tank 8 respectively, and then the heating plate 13 is controlled to start, heating methanol and diesel to 45 degrees. Then the ultrasonic transmitter 14 is started to mix methanol and diesel. When ultrasonic waves propagate in the liquid, alternating high-pressure and low-pressure regions will be generated. In the low-pressure region, tiny bubbles will form in the liquid, and these bubbles will rapidly collapse in the high-pressure region, generating strong local shock waves and microjets. The microjets and shock waves generated by the cavitation effect can break the interfacial film between methanol and diesel, promoting the mixing of the two for ten minutes.

[0053] S3. Combustion: By starting the first plunger pump 6, the mixed methanol and diesel are transported into the fuel tank 4, and the diesel engine 1 is started. The diesel engine 1 burns the methanol and diesel in the fuel tank 4, and the exhaust gas enters the gas tank 201 through the exhaust pipe.

[0054] S4. Cooling and filtering: By controlling the start of the third plunger pump 302, the third plunger pump 302 transports the cold water inside the cold water tank 301 into the first connecting pipe 303, and then into the disc-shaped heat exchange pipe 310, where it exchanges heat with the high temperature in the exhaust gas. The cooled exhaust gas enters the upper part inside the gas tank 201 and is detected by the detection module 204. During the detection process, the exhaust gas enters the treatment box 202, where it is filtered by three filter nets 207. The diesel particulate filter captures particulate matter in the exhaust gas, including soot and other solid particles, using porous ceramic or metal filter materials. By utilizing the adsorption effect of activated carbon, organic pollutants and some inorganic pollutants in the exhaust gas are removed. A catalyst is coated on the filter material, and through catalytic oxidation reaction, carbon monoxide and unburned hydrocarbons are oxidized into carbon dioxide and water to prevent the discharged exhaust gas from affecting the environment;

[0055] S5. Cleaning: By controlling the contraction of the electric telescopic rod 2093, the electric telescopic rod 2093 drives the pressing plate 2094 to move backward, thereby releasing the restriction on the bracket 206. Then, the three brackets 206 are pulled out, and the three filter nets 207 are cleaned and replaced. After the replacement is completed, they are inserted into the three chutes 205 again. The six connecting plates 2092 are rotated so that the six pressing plates 2094 are located at the rear ends of the three brackets 206. Then, the six electric telescopic rods 2093 are controlled to extend, and the six electric telescopic rods 2093 push the six pressing plates 2094 to squeeze the three brackets 206 for installation.

[0056] Embodiment 2: Different from Embodiment 1:

[0057] S1. Preparation before experiment: Methanol and diesel are respectively added into the first storage tank 7 and the second storage tank 10 through two liquid inlet valves 11, and cold water is added into the cold water tank 301 through the water inlet valve 313;

[0058] S2. Mixing: By controlling the two second plunger pumps 12 to respectively transport methanol and diesel quantitatively into the mixing tank 8, then controlling the heating plate 13 to start, heating methanol and diesel to 45 degrees, and then starting the ultrasonic emitter 14 to mix methanol and diesel. When ultrasonic waves propagate in a liquid, alternating high-pressure and low-pressure regions will be generated. In the low-pressure region, tiny bubbles will form in the liquid. These bubbles rapidly collapse in the high-pressure region, generating strong local shock waves and microjets. The microjets and shock waves generated by the cavitation effect can break the interfacial film between methanol and diesel, promoting their mixing for ten minutes;

[0059] S3. Combustion: By starting the first plunger pump 6 to transport the mixed methanol and diesel into the fuel tank 4, starting the diesel engine 1, and the diesel engine 1 burns the methanol and diesel inside the fuel tank 4, and the exhaust gas enters the gas tank 201 through the exhaust pipe;

[0060] S4. Cooling and filtering: By controlling the start of the third plunger pump 302, the third plunger pump 302 delivers the cold water inside the cold water tank 301 into the first connecting pipe 303, and then into the disc-shaped heat exchange pipe 310, where it exchanges heat with the high temperature in the exhaust gas. The cooled exhaust gas enters the upper part inside the gas tank 201 and is detected by the detection module 204. During the detection process, the exhaust gas enters the treatment tank 202 and is filtered by three filter meshes 207. The diesel particulate filter mesh captures the particulate matter in the exhaust gas, including soot and other solid particles, through porous ceramic or metal filter materials. By using the adsorption effect of activated carbon, organic pollutants and some inorganic pollutants in the exhaust gas are removed. A catalyst is coated on the filter material, and through catalytic oxidation reaction, carbon monoxide and unburned hydrocarbons are oxidized into carbon dioxide and water to prevent the discharged exhaust gas from affecting the environment;

[0061] S5. Continuous experiment: The hot water enters the third spiral heat exchange pipe 311 through the second connecting pipe 304, and the third spiral heat exchange pipe 311 heats the mixing tank 8. At this time, the use of the heating plate 13 is stopped. Then, it is discharged through the third spiral heat exchange pipe 311 and enters the fourth connecting pipe 312, and then into the first spiral heat exchange pipe 305 and the second spiral heat exchange pipe 306 to preheat the next batch of methanol and diesel entering the mixing tank 8, and finally enters the hot water tank 308 for storage;

[0062] S6. Cleaning: By controlling the contraction of the electric telescopic rod 2093, the electric telescopic rod 2093 drives the pressing plate 2094 to move backward, thus releasing the restriction on the bracket 206. Then, the three brackets 206 are pulled out, and the three filter meshes 207 are cleaned and replaced. After the replacement, they are inserted into the three sliding grooves 205 again. The six connecting plates 2092 are rotated so that the six pressing plates 2094 are located at the rear ends of the three brackets 206. Then, the six electric telescopic rods 2093 are controlled to extend, and the six electric telescopic rods 2093 push the six pressing plates 2094 to squeeze the three brackets 206 for installation.

[0063] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combustion performance test device for diesel-methanol blended fuel, comprising a diesel engine (1), a fuel tank (4), a water storage tank (5) and a detection structure (2), wherein the detection structure (2), the fuel tank (4) and the water storage tank (5) are all arranged on the upper end face of the diesel engine (1), and is characterized in that: On one side of the diesel engine (1), there is a mixing tank (8). At the center of the upper end face of the mixing tank (8), a first plunger pump (6) is fixedly connected. The output end of the first plunger pump (6) is connected to the input end of the fuel tank (4). Horizontally arranged at the rear of the mixing tank (8) are a first storage tank (7) and a second storage tank (10). At the center of the upper end faces of both the first storage tank (7) and the second storage tank (10), a second plunger pump (12) is fixedly connected. The output ends of the two second plunger pumps (12) both penetrate through the rear end face of the mixing tank (8) and lead to the rear inner wall of the mixing tank (8). The detection structure (2) includes an air tank (201). At the lower part inside the air tank (201), a partition (203) is fixedly connected. On the upper end face of the air tank (201), a processing tank (202) is fixedly connected. At the center and rear of the upper inner wall of the air tank (201), a detection module (204) is fixedly connected. Inside the processing tank (202), three sliding grooves (205) are arranged vertically. Inside each of the three sliding grooves (205), a support (206) is slidably connected. Inside each of the three supports (206), a filter screen (207) is provided. The rear ends of the three supports (206) all penetrate through the rear inner wall of the processing tank (202) and lead to the rear end face of the processing tank (202). On the rear end face of the air tank (201) at the lower parts on both sides of the rear end of the support (206), a limiting structure (209) is provided. On the upper end face of the processing tank (202), a smoke exhaust port (208) is provided. On one side of the second storage tank (10) at the rear of the diesel engine (1), there is a heat exchange structure (3). At the lower part of the outer side wall of the mixing tank (8), a groove (15) is formed.

2. The combustion performance test device for diesel-methanol blended fuel according to claim 1, characterized in that: The limiting structure (209) includes a connecting column (2091). The connecting column (2091) is fixedly connected to the rear end face of the processing tank (202). At the rear part of the outer side wall of the connecting column (2091), a connecting plate (2092) is rotatably sleeved. At the other end of the front end face of the connecting plate (2092), an electric telescopic rod (2093) is fixedly connected. The output end of the electric telescopic rod (2093) is fixedly connected to a pressing plate (2094). The pressing plate (2094) is attached to the rear end face of the support (206).

3. The combustion performance test device for diesel-methanol blended fuel according to claim 1, characterized in that: The heat exchange structure (3) includes a cold water tank (301). At the center of the upper end face of the cold water tank (301), a third plunger pump (302) is fixedly connected. The output end of the third plunger pump (302) is fixedly connected to a first connecting pipe (303). The first connecting pipe (303) penetrates through a side wall of the air tank (201) and extends into the air tank (201), and its end is fixedly connected to a disc-shaped heat exchange pipe (310). The output end of the disc-shaped heat exchange pipe (310) penetrates through the rear inner wall of the air tank (201) and extends to the rear end of the air tank (201), and its end is fixedly connected to a second connecting pipe (304). The second connecting pipe (304) extends into the groove (15), and its end is fixedly connected to a third spiral heat exchange pipe (311). The output end of the third spiral heat exchange pipe (311) extends to the rear end of the mixing tank (8), and its end is fixedly connected to a fourth connecting pipe (312). The output end of the fourth connecting pipe (312) is fixedly connected to a first spiral heat exchange pipe (305). The output end of the first spiral heat exchange pipe (305) is fixedly connected to a second spiral heat exchange pipe (306). The first spiral heat exchange pipe (305) and the second spiral heat exchange pipe (306) are respectively sleeved on the output ends of two second plunger pumps (12). The output end of the second spiral heat exchange pipe (306) is fixedly connected to a third connecting pipe (307). The output end of the third connecting pipe (307) is fixedly connected to a hot water tank (308).

4. The combustion performance test device for diesel-methanol blended fuel according to claim 3, characterized in that: At the lower center of the rear end face of the hot water tank (308), a drain valve (309) is fixedly connected. At the center of the upper end face of the cold water tank (301) near one side, a water inlet valve (313) is fixedly connected.

5. A combustion performance test device for diesel-methanol blended fuel according to claim 1, characterized in that: An insulating board (9) is fixedly sleeved on the outer side wall of the mixing tank (8) located outside the groove (15).

6. The combustion performance test device for diesel-methanol blended fuel according to claim 1, wherein: At the lower part of the inner side wall of the mixing tank (8), a heating plate (13) is fixedly connected. At the center of the lower inner wall of the mixing tank (8), an ultrasonic transmitter (14) is fixedly connected.

7. An experimental device for the combustion performance of a diesel-methanol blended fuel according to claim 1, characterized in that: Liquid inlet valves (11) are provided at the rear side of one side of the upper end faces of the first storage tank (7) and the second storage tank (10).

8. A combustion performance test device for diesel-methanol blended fuel according to claim 1, characterized in that: The three filter meshes (207) are respectively a diesel particle filter mesh, an activated carbon filter mesh, and a filter mesh coated with a catalyst.

9. A test method for the combustion performance of a diesel-methanol blended fuel, which uses a test device for the combustion performance of a diesel-methanol blended fuel described in any one of the above claims 1 to 8, characterized in that: It includes the following steps: S1. Preparation before the experiment. Methanol and diesel are respectively added into the first storage tank (7) and the second storage tank (10) through two liquid inlet valves (11), and cold water is added into the cold water tank (301) through the water inlet valve (313). S2. Mixing. The methanol and diesel are quantitatively transported into the mixing tank (8) by controlling two second plunger pumps (12) respectively. Then, the heating plate (13) is controlled to start, and the methanol and diesel are heated to 45 degrees. Then, the ultrasonic transmitter (14) is started to mix the methanol and diesel. When ultrasonic waves propagate in a liquid, alternating high-pressure and low-pressure regions will be generated. In the low-pressure region, tiny bubbles will form in the liquid. These bubbles will quickly collapse in the high-pressure region, generating strong local shock waves and microjets. The microjets and shock waves generated by the cavitation effect can break the interfacial film between methanol and diesel, promoting the mixing of the two for ten minutes. S3. Combustion: Start the first plunger pump (6) to deliver the mixed methanol and diesel into the fuel tank (4). Start the diesel engine (1), and the diesel engine (1) burns the methanol and diesel inside the fuel tank (4). The exhaust gas enters the gas box (201) through the exhaust pipe. S4. Cooling and Filtration: Start the third plunger pump (302). The third plunger pump (302) delivers the cold water inside the cold water tank (301) into the first connecting pipe (303), and then into the disc-shaped heat exchange pipe (310) to exchange heat with the high temperature in the exhaust gas. The cooled exhaust gas enters the upper part inside the gas box (201) and is detected by the detection module (204). During the detection process, the exhaust gas enters the treatment box (202) and is filtered by three filter meshes (207). The diesel particulate filter mesh captures the particulate matter in the exhaust gas, including soot and other solid particles, using porous ceramic or metal filter materials. By the adsorption of activated carbon, organic pollutants and some inorganic pollutants in the exhaust gas are removed. A catalyst is coated on the filter material, and through catalytic oxidation reaction, carbon monoxide and unburned hydrocarbons are oxidized into carbon dioxide and water to prevent the discharged exhaust gas from affecting the environment. S5. Continuous Experiment: The hot water enters the third spiral heat exchange pipe (311) through the second connecting pipe (304). The third spiral heat exchange pipe (311) heats the mixing box (8). At this time, stop using the heating plate (13). Then, after being discharged through the third spiral heat exchange pipe (311), it enters the fourth connecting pipe (312), and then into the first spiral heat exchange pipe (305) and the second spiral heat exchange pipe (306) to preheat the next batch of methanol and diesel entering the mixing box (8). Finally, it enters the hot water tank (308) for storage. S6. Cleaning: Control the electric telescopic rod (2093) to contract. The electric telescopic rod (2093) drives the pressing plate (2094) to move backward, thus releasing the restriction on the bracket (206). Then, pull out the three brackets (206), clean and replace the three filter meshes (207). After the replacement, insert them into the three chutes (205) again. Rotate the six connecting plates (2092) so that the six pressing plates (2094) are located at the rear end of the three brackets (206). Then, control the six electric telescopic rods (2093) to extend, and the six electric telescopic rods (2093) push the six pressing plates (2094) to squeeze the three brackets (206) for installation.

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