Biomass alcohol-based fuel purification device and method

Abstract

The invention relates to the technical field of biomass energy processing, in particular to a biomass alcohol-based fuel purification device and method.The biomass alcohol-based fuel purification device comprises a purification tank and a collection pipeline communicated with the purification tank through a suction pump, and the purification tank is communicated with a liquid inlet pipeline through a suction pump; a mixing mechanism, a feeding mechanism and an anti-precipitation mechanism are arranged in the purification tank. According to the invention, the dehydrating agent and the alcohol-based fuel can be premixed, so that the dehydrating agent particles are preliminarily dispersed, and the dehydrating agent particles are more easily and uniformly mixed with the alcohol-based fuel after entering the purification tank; undissolved dehydrating agent particles are ground through the rotating screening disc, large carbon dioxide bubbles are crushed and conveyed into the mixing barrel again to participate in dissolution again, precipitation of the undissolved dehydrating agent particles is reduced, and resource waste can be reduced while the purification efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of biomass energy processing, and in particular to a biomass alcohol-based fuel purification device and method. Background Technology

[0002] Biomass alcohol-based fuel is a clean energy source produced from biomass, boasting advantages such as renewability, high combustion efficiency, and low pollution, making it a promising candidate for application in the energy sector. However, biomass alcohol-based fuel production processes often result in impurities such as moisture, organic acids, and phenols. This is because its raw materials are primarily biomass materials like straw and sawdust, which inherently contain moisture, small amounts of organic acids, and phenols. During fermentation to produce alcohol, microbial metabolism generates water, and improper environmental control can lead to the growth of unwanted bacteria that produce organic acids. Furthermore, lignin degradation during raw material pretreatment generates phenols. These impurities affect the fuel's performance and effectiveness, necessitating purification.

[0003] A search revealed Chinese Patent Publication No. CN219462508U, which discloses a purification device for alcohol-based fuels. The device includes a purification tank, a purification component, and a purification assembly. A connecting plate is fixedly installed on the top inner side of the purification tank, and the purification component is located at the bottom of the connecting plate. The purification assembly includes a first water bath chamber, which is fixedly installed at the bottom of the connecting plate. Two sets of limiting ring plates are fixedly installed on the top of the first water bath chamber. The purification assembly also includes a second water bath chamber, which is fixedly installed inside the purification tank and located below the first water bath chamber. The purification assembly further includes an electromagnetic controller, which is fixedly installed on the top of the connecting plate. Two sets of slots are formed on the top of the first water bath chamber.

[0004] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: Existing distillation methods are energy-intensive and ineffective at separating impurities with boiling points close to the target alcohol; adsorption methods have high adsorbent regeneration costs and limited adsorption capacity; and membrane separation methods have high membrane costs and are prone to fouling. Furthermore, some impurities in the raw materials, such as organic acids and phenols, possess a certain degree of viscosity. During storage or transportation, organic acids (such as lactic acid and acetic acid) in the raw materials may react with phenolic substances produced by the degradation of lignin in biomass. For example, organic acids can act as catalysts or participate in the reaction, promoting condensation reactions of phenolic substances to form polymers with larger molecular weights. Simultaneously, sugar derivatives produced from cellulose and hemicellulose in biomass raw materials during pretreatment or fermentation may also undergo complex chemical reactions with phenols and organic acids, generating adhesive substances. Over time, these substances gradually aggregate, forming large clumps. Clumping leads to insufficient contact between the raw materials and the treatment agent, affecting the uniformity and efficiency of the purification reaction. Summary of the Invention

[0005] To improve the purification efficiency of biomass alcohol-based fuels, this application provides a biomass alcohol-based fuel purification apparatus and method.

[0006] This application provides a biomass alcohol-based fuel purification device, which adopts the following technical solution: it includes a purification tank and a collection pipe connected to the purification tank via a suction pump, characterized in that: the purification tank is connected to the liquid inlet pipe via a suction pump; the purification tank is provided with a mixing mechanism, a feeding mechanism and an anti-sedimentation mechanism; The mixing mechanism includes a rotatable mixing cylinder with openings at both the top and bottom of the purification tank, and an auger located inside the mixing cylinder. The rotation direction of the auger is opposite to that of the mixing cylinder. A sieve disc is provided at the bottom of the auger's shaft, and the sieve disc has multiple sieve holes. Abrasive particles are provided in the area between adjacent sieve holes. An agitator is also hinged to the outside of the mixing cylinder, and a conveying pipe communicating with the inside of the mixing cylinder is provided on the agitator. The feeding mechanism includes a first piston disc that slides back and forth inside the mixing cylinder. The first piston disc has a feed hole and an air inlet. The anti-sedimentation mechanism includes a suction cylinder provided on the outer wall of the mixing cylinder. The suction cylinder is connected to a suction pipe and a discharge pipe. The suction end of the suction pipe is located at the top of the mixing cylinder, and the discharge end of the discharge pipe communicates with the space formed between the sieve disc and the first piston disc inside the mixing cylinder.

[0007] By adopting the above technical solution, during the purification process, the alcohol-based fuel is transported to the purification tank by a suction pump. The alcohol-based fuel then flows into the mixing drum, and the dehydrating agent is introduced into the mixing drum through the feed port. The first piston disc reciprocates within the mixing drum, and the turbulence generated during this reciprocating motion initially agitates the alcohol-based fuel and dehydrating agent located at the bottom of the mixing drum. When the first piston disc moves upward to its limit position, the upper end face of the first piston disc comes into close contact with the lower end face of the rotating screen disc. In this situation, the screen disc, on the one hand, grinds the undissolved dehydrating agent with abrasive particles, facilitating the entry of the alcohol-based fuel through the screen holes of the screen disc into the upper part of the mixing drum. After entering the upper part of the mixing drum, the alcohol-based fuel is lifted into the purification tank by an auger and enters each layer of the purification tank through the conveying pipe on the stirring blades. Inside the purification tank, the alcohol-based fuel clumps that have settled to the bottom are drawn into the suction drum through the suction pipe, and then into the space between the screen disc and the first piston disc in the mixing drum. Under the combined action of the reciprocating motion of the first piston disc and the rotating screen disc, the agglomerates in the alcohol-based fuel are further ground up and re-enter the upper part of the mixing drum.

[0008] Optionally, the purification tank is sealed; the suction cylinder is connected to a suction pipe, the suction end of which is located at the top of the mixing cylinder; the material suction pipe, the suction pipe, and the discharge pipe are connected to the lower inner cavity of the suction cylinder; the material suction pipe is connected to the suction cylinder through a first check valve; the discharge pipe is connected to the suction cylinder through a second check valve; and a second piston disc is slidably connected inside the suction cylinder.

[0009] By adopting the above technical solution, the carbon dioxide gas entering the purification tank, before completely dissolving with the alcohol-based fuel, will float to the top of the purification tank due to buoyancy. The suction cylinder is connected to the top of the purification tank through the suction pipe. When the second piston disc slides upward inside the suction cylinder, the space between the second piston disc and the bottom wall of the suction cylinder gradually increases, and a negative pressure is generated inside the suction cylinder. Under this negative pressure, the carbon dioxide gas at the top of the purification tank and the alcohol-based fuel agglomerates at the bottom are sucked into the suction cylinder through the suction pipe. Thanks to the second check valve, when the second piston disc performs the suction operation, the mixture of carbon dioxide gas and alcohol-based fuel agglomerates in the discharge pipe will not flow back into the suction cylinder due to the negative pressure. When the second piston disc slides downward, the space between the second piston disc and the bottom wall of the suction cylinder is continuously compressed; the mixture in the suction cylinder, under the downward pressure of the second piston disc, enters the mixing cylinder through the discharge pipe. Due to the presence of the first check valve, the mixture in the suction cylinder will not flow back into the suction pipe during the downward sliding of the second piston disc.

[0010] Optionally, the air inlet and feed inlet on the first piston disc are respectively provided with an air inlet pipe and a feed pipe; the air inlet pipe is connected to an external air storage tank through an air pump; the feed pipe is connected to an external dehydrating agent storage tank through a feed pump.

[0011] Optionally, a cylinder is fixedly installed at the bottom of the purification tank, and the output shaft of the cylinder is fixedly connected to the air inlet pipe.

[0012] Optionally, the bottom wall of the purification tank is provided with a sliding hole, and a sliding disc is slidably connected within the sliding hole. The sliding disc is fixedly connected to the upper part of the air inlet pipe and the feed pipe. A connecting part is provided on the side wall of the stirring blade, and a square hole is provided within the connecting part. A driving rod is connected within the square hole, the diameter of which is smaller than the diameter of the square hole. A transmission rod is fixedly installed at one end of the driving rod, and the lower end of the transmission rod is slidably connected to the sliding disc. An annular slide rail is provided on the upper part of the sliding disc, and an annular groove adapted to the annular slide rail is provided at the bottom of the transmission rod.

[0013] By adopting the above technical solution, the upper part of the air intake pipe and the lower part of the feed pipe can be made of rigid pipe, and the lower part can be made of flexible pipe. The telescopic shaft of the cylinder is fixedly connected to the rigid pipe part at the top of the air intake pipe. When the cylinder drives the first piston disc to slide up and down, the sliding disc can drive the transmission rod to move up and down synchronously. The stirring blade and the mixing cylinder are connected by a hinge. The transmission rod, with the help of the connecting part in the square hole, can drive the stirring blade to swing up and down with the hinge point between it and the mixing cylinder as the center. The diameter of the square hole is larger than the diameter of the driving rod. During the process of the transmission rod driving the stirring blade to swing, the driving rod will not interfere with the square hole, thus ensuring the smoothness of the entire transmission and stirring process.

[0014] Optionally, the outer wall of the mixing cylinder is provided with a hinge seat, and one end of the stirring blade is provided with a hinge rod, and the stirring blade is hinged to the outer wall of the mixing cylinder; one end of the conveying pipe is connected to the inside of the mixing cylinder through a corrugated pipe; the outer wall of the conveying pipe is provided with a spray hole.

[0015] By adopting the above technical solution, and through the setting of the hinge seat and hinge rod, the mixing drum drives the stirring blade to rotate, while the stirring blade can also perform additional periodic reciprocating oscillations around the hinge axis, thus improving the stirring effect of the stirring blade on the mixture of dehydrating agent and alcohol-based fuel in the purification tank. Since the sliding disc needs to drive the transmission rod to move up and down to make the stirring blade oscillate, and the stirring blade also needs to be driven by the mixing drum to rotate around the axis of the mixing drum, the stirring blade will synchronously drive the transmission rod to rotate. The bottom of the transmission rod is slidably connected to the sliding disc, which allows the transmission rod to move up and down while also rotating around the axis of the mixing drum. The corrugated pipe design allows the media transmission between the mixing drum and the conveying pipe to adapt to the oscillation of the stirring blade.

[0016] Optionally, a second piston rod is provided on the upper end face of the second piston disc, and the second piston rod is fixedly connected to the transmission rod.

[0017] Optionally, a rotating rod is provided at the upper end of the mixing cylinder; a rotating hole is provided on the top wall of the purification tank, and the mixing cylinder is rotatably connected to the rotating hole through the rotating rod; a drive motor is provided on the upper end face of the purification tank, and a first bevel gear is provided on the output shaft of the drive motor; a second bevel gear and a third bevel gear that mesh with the first bevel gear are respectively sleeved on the rotating rod and the rotating shaft of the auger.

[0018] Optionally, the mixing cylinder has a water inlet hole on its peripheral wall, and a first one-way valve is provided on one side of the water inlet hole. The water inlet hole is connected to the space inside the purification tank through the first one-way valve.

[0019] Since the transmission rod is fixedly connected to the second piston rod, when the transmission rod moves up and down, it synchronously drives the second piston disc to move up and down through the second piston rod, making the space between the second piston disc and the bottom wall of the suction cylinder larger or smaller. This allows the gas in the upper part of the purification tank and the alcohol-based fuel agglomerates in the lower part to be sucked into the suction cylinder, or the liquid in the suction cylinder to be discharged into the mixing cylinder. The drive motor drives the second and third gears to rotate through the meshing of the first gear. The second and third gears drive the mixing cylinder and the auger to rotate, respectively. The rotating mixing cylinder drives the stirring blades to rotate, so that the stirring blades can mix the liquid in the purification tank. The rotating auger can lift the mixture at the bottom of the mixing cylinder and transport it to the purification tank through the conveying pipes on the top of the mixing cylinder or the stirring blades.

[0020] Optionally, a method for purifying biomass alcohol-based fuel includes the following steps: S1: The alcohol-based fuel to be purified is transported to the sealed purification tank through the inlet pipe by a suction pump; S2: The feed pipe delivers dehydrating agent into the mixing drum, and the air inlet pipe delivers carbon dioxide gas into the mixing drum; S3: When the first piston disc moves upward to its limit position, its upper end face is close to the lower end face of the rotating screen disc inside the mixing cylinder, and the abrasive particles on the screen disc grind and refine the undissolved dehydrating agent. S4: The rotating screen disc breaks larger carbon dioxide bubbles into smaller bubbles, enhancing their contact efficiency with fuel. The upward movement of the first piston disc can also flush the screen holes of the screen disc with gas, preventing clogging. S5: The auger lifts the material at the top of the mixing drum, and the material is evenly sprayed into each layer of the purification tank through the conveying pipe on the stirring blades; S6: After completion, the suction and discharge pump will output the finished product in the purification tank through the collection pipe.

[0021] In summary, this application includes the following beneficial technical effects: 1. This invention premixes the dehydrating agent and alcohol-based fuel in a mixing drum, thereby initially dispersing the dehydrating agent particles and making them easier to mix evenly with the alcohol-based fuel after entering the purification tank. The sieve disc prevents large pieces of dehydrating agent from directly entering the purification tank, while the first piston disc brings the alcohol-based fuel in the mixing drum close to the rotating sieve disc, improving the efficiency of the sieve disc in grinding the dehydrating agent particles.

[0022] 2. This invention introduces carbon dioxide gas into the alcohol-based fuel. After dissolving in the biomass alcohol-based fuel system, the carbon dioxide interacts with water, altering the system's polarity. This increases the solubility difference between the target alcohol and impurities such as organic acids and phenols in different polar environments, making it easier for these impurities to separate from the target alcohol. A sealed purification tank is used, with a suction cylinder connecting the bottom and top. The suction cylinder re-transports the precipitated alcohol-based fuel clumps at the bottom and the carbon dioxide gas at the top of the purification tank into a mixing cylinder. A rotating sieve disc grinds up the undissolved dehydrating agent and breaks down large carbon dioxide bubbles, then re-transports them into the mixing cylinder for further dissolution. This reduces the amount of undissolved dehydrating agent absorbing water and settling, while also minimizing resource waste.

[0023] 3. The first piston disc of the present invention reciprocates inside the mixing cylinder, so that the mixed liquid inside the mixing cylinder can flush the screen holes on the screen disc and avoid clogging of the screen disc.

[0024] 4. While the stirring blades of the present invention move in a circular motion around the axis of the purification tank, they can also swing up and down to disturb the mixture in a vertical direction, reducing the possibility of alcohol-based fuel clumping and undissolved dehydrating agent settling at the bottom, so that the dehydrating agent and alcohol-based fuel can fully contact and mix, improving the uniformity of mixing and thus improving the mixing efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a biomass alcohol-based fuel purification device according to the present invention; Figure 2 This is a top view of the overall structure of the present invention; Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction; Figure 4 for Figure 3 Enlarged structural diagram of section B in the middle; Figure 5 This is a side view of the hybrid mechanism in this invention. Figure 6 This is a top view of the sieve tray structure in this invention; Figure 7 This is a top view of the sieve disc structure in this invention.

[0026] Reference numerals: 1. Purification tank; 11. Suction pump; 12. Suction pump; 13. Cylinder; 14. Sliding disc; 15. Annular slide rail; 16. Drive motor; 17. First bevel gear; 18. Second bevel gear; 19. Third bevel gear; 110. First one-way valve; 2. Mixing mechanism; 21. Mixing cylinder; 22. Screwdriver; 23. Screening disc; 24. Stirring blade; 25. Feeding pipe; 26. Hinge seat; 27. Abrasive grain; 28. Square hole; 29. ​​Rotating rod; 3. Feeding mechanism; 31. First piston disc; 32. Feed hole; 33. Air inlet; 34. Air inlet pipe; 35. Feeding pipe; 4. Anti-sedimentation mechanism; 41. Suction cylinder; 42. Suction pipe; 43. Discharge pipe; 44. Second piston disc; 45. First check valve; 46. Second check valve; 47. Suction pipe; 48. Second piston rod. Detailed Implementation

[0027] The following is in conjunction with the appendix Figures 1-7 This application will be further described in detail below. The technical solutions in the embodiments of this application will be clearly described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0028] This application discloses a biomass alcohol-based fuel purification device. For example... Figure 1 As shown, the system includes a purification tank 1, which is connected to a collection pipe via a suction pump 11 and to an inlet pipe via a suction pump 12. The purification tank 1 is equipped with a mixing mechanism 2, a feeding mechanism 3, and an anti-sedimentation mechanism 4. The mixing mechanism 2 includes a rotatable mixing cylinder 21 with openings at both the top and bottom of the purification tank 1, and an auger 22 located inside the mixing cylinder 21. The rotation direction of the auger 22 is opposite to that of the mixing cylinder 21. A sieve plate 23 is located at the bottom of the auger 22's shaft. A stirring blade 24 is also hinged to the outside of the mixing cylinder 21. The stirring blade 24 is provided with a conveying pipe 25 that communicates with the inside of the mixing cylinder 21; the feeding mechanism 3 includes a first piston disc 31 that slides back and forth inside the mixing cylinder 21, and the first piston disc 31 is provided with a feed hole 32; the anti-sedimentation mechanism 4 includes a suction cylinder 41 provided on the outer wall of the mixing cylinder 21, the suction cylinder 41 is connected to a suction pipe 42 and a discharge pipe 43 respectively, the suction end of the suction pipe 42 is located at the bottom of the mixing cylinder 21, and the discharge end of the discharge pipe 43 is connected to the space formed between the screen disc 23 and the first piston disc 31 inside the mixing cylinder 21; In this embodiment, when purification is required, alcohol-based fuel is delivered into purification tank 1 by suction pump 12, and then the alcohol-based fuel enters mixing cylinder 21; at this time, dehydrating agent is delivered into mixing cylinder 21 through feed hole 32, and the dehydrating agent can be calcium chloride. The first piston disc 31 reciprocates, and the turbulence generated by the reciprocating motion forms a preliminary mixture of the alcohol-based fuel and dehydrating agent at the bottom of the mixing cylinder 21. At the same time, when the first piston disc 31 moves upward to its limit position, the upper end face of the first piston disc 31 comes into close contact with the lower end face of the rotating screen disc 23, so that the screen disc 23 grinds the undissolved dehydrating agent, which then enters the upper part of the mixing cylinder 21 through the screen holes of the screen disc 23. After entering the upper part of the mixing cylinder 21, the dehydrating agent is lifted by the screw conveyor 22 and enters the purification tank 1, and enters each layer of the purification tank 1 through the conveying pipe 25 on the stirring blade 24. Inside the purification tank 1, the alcohol-based fuel agglomerates that have settled to the bottom will enter the suction cylinder 41 through the suction pipe 42, and then enter the space between the screen plate 23 and the first piston plate 31 in the mixing cylinder 21. Under the combined action of the reciprocating motion of the first piston plate 31 and the rotating screen plate 23, they will be further ground up and then re-enter the upper part of the mixing cylinder 21.

[0029] Reference Figure 5 In order to improve the stirring effect of the stirring blade 24, in this invention, the outer wall of the mixing cylinder 21 is provided with a hinge seat 26, and one end of the stirring blade 24 is provided with a hinge rod, and the stirring blade 24 is hinged to the outer wall of the mixing cylinder 21. In this embodiment, by setting the hinge seat 26 and the hinge rod, the mixing cylinder 21 drives the stirring blade 24 to rotate, and the stirring blade 24 can also perform additional periodic reciprocating oscillation with the hinge axis as the center, so that the stirring blade 24 can better stir the mixture of dehydrating agent and alcohol-based fuel in the purification tank 1.

[0030] Reference Figure 5 In order to improve the material conveying effect of the conveying pipe 25, in this invention, one end of the conveying pipe 25 is connected to the inside of the mixing cylinder 21 through a corrugated pipe; the outer wall of the conveying pipe 25 is provided with a spray hole; In this embodiment, the bellows allows the stirring blade 24 to adapt to the positional changes between the stirring blade 24 and the mixing cylinder 21 when the stirring blade 24 oscillates periodically around the hinge axis, thereby enabling the mixing cylinder 21 to continuously and stably supply material to the conveying pipe 25. At the same time, the multiple spray holes allow the mixture of dehydrating agent and alcohol-based fuel to be evenly sprayed into the purification tank 1 after initial mixing.

[0031] Reference Figure 4 and Figure 6 In order to improve the grinding effect of the screen disk 23 on undissolved dehydrating agent and agglomerated alcohol-based fuel, abrasive particles 27 are provided between the screen holes on the screen disk 23 in this invention. In this embodiment, by setting the abrasive particles 27, when the first piston disk 31 moves upward to the limit position, the space between the first piston disk 31 and the sieve disk 23 is reduced. The alcohol-based fuel that cannot pass through the sieve holes is left in the space between the first piston disk 31 and the sieve disk 23. The abrasive particles 27 on the rotating sieve disk 23 cooperate with the first piston disk 31 to grind the undissolved dehydrating agent, making the particle size of the dehydrating agent finer and easier to dissolve with water in the alcohol-based fuel.

[0032] Reference Figure 4 In this invention, a second piston disc 44 is slidably connected inside the suction cylinder 41; the connection between the suction pipe 42 and the suction cylinder 41 is located at the lower part of the peripheral wall of the suction cylinder 41, and the connection between the discharge pipe 43 and the suction cylinder 41 is located at the lower end face of the suction cylinder 41; the suction pipe 42 and the suction cylinder 41 are connected by a first check valve 45, which prevents the mixture in the suction cylinder 41 from flowing back into the suction pipe 42; the discharge pipe 43 and the suction cylinder 41 are connected by a second check valve 46, which prevents the mixture in the suction pipe 42 from flowing back into the mixing cylinder 21. In this embodiment, when the second piston disc 44 slides upward in the suction cylinder 41, the space between the second piston disc 44 and the bottom wall of the suction cylinder 41 increases, and a negative pressure is generated in the suction cylinder 41. The undissolved alcohol-based fuel at the bottom of the purification tank 1 is drawn into the suction cylinder 41 through the suction pipe 42. Due to the setting of the second check valve 46, when the suction cylinder 41 is being suctioned by the second piston disc 44, the mixture in the discharge pipe 43 will not flow back into the suction cylinder 41 under the action of negative pressure. When the second piston disc 44 slides downward, the space between the second piston disc 44 and the bottom wall of the suction cylinder 41 is continuously compressed. The mixture in the suction cylinder 41 enters the mixing cylinder 21 through the discharge pipe 43 under the downward pressure of the second piston disc 44. Due to the setting of the first check valve 45, the dehydrating agent and alcohol-based fuel mixture in the suction cylinder 41 will not flow back into the suction pipe 42 when the second piston disc 44 slides downward.

[0033] Reference Figure 5 When carbon dioxide dissolves in a biomass alcohol-based fuel system, it interacts with water, altering the system's polarity. The solubility difference between the target alcohol (e.g., methanol, ethanol) and impurities (organic acids, phenols, etc.) increases in different polarity environments. For example, in a system where polarity changes, the degree of dissociation of organic acids is affected, weakening their interaction with the target alcohol and making them easier to separate. Simultaneously, the presence of carbon dioxide also affects the system's pH, further promoting the separation of impurities from the target alcohol. In this invention, the purification tank 1 is sealed; the suction cylinder 41 is also connected to a suction pipe 47, with the suction end of the suction pipe 47 located at the top of the mixing cylinder 21, and the other end of the suction pipe 47 connected to the suction cylinder 41; the first piston disc 31 is also provided with an air inlet 33. In this embodiment, carbon dioxide gas is introduced into the mixing cylinder 21 through the air inlet 33. When the first piston disc 31 moves upward, it will compress the space between the first piston disc 31 and the screen disc 23. The rotating screen disc 23 will break up large carbon dioxide bubbles. At the same time, the upward first piston disc 31 can also clear the blockage of the screen disc 23 through the carbon dioxide gas.

[0034] Due to buoyancy, carbon dioxide gas may float to the surface before it has completely dissolved with impurities in the alcohol-based fuel. At this time, the up-and-down movement of the second piston disc 44 draws carbon dioxide gas from the top of the purification tank 1 through the suction pipe 47 and transports it into the mixing cylinder 21.

[0035] Reference Figure 4 and Figure 5In order to make the feeding mechanism 3 more stable, in this invention, the air inlet 33 and the feed inlet 32 ​​on the first piston disc 31 are respectively provided with an air inlet pipe 34 and a feed pipe 35; the air inlet pipe 34 can be connected to an external air storage tank through an air pump; the feed pipe 35 can be connected to an external alcohol-based fuel storage tank through a feed pump; the upper part of the air inlet pipe 34 and the feed pipe 35 are both made of rigid pipe, and the lower part is made of flexible pipe; In this embodiment, air is supplied to the mixing cylinder 21 by an air pump, and dehydrating agent is supplied to the mixing cylinder 21 by a feed pump, so that the supply of dehydrating agent and air to the mixing cylinder 21 is more stable; the feed pump can be a screw feed pump, and a check valve can be installed between the feed pump and the feed pipe 35.

[0036] Reference Figure 1 and Figure 3 In order to enable the first piston disc 31 to move up and down, in this invention, a cylinder 13 is fixedly installed at the bottom of the purification tank 1, and the output shaft of the cylinder 13 is fixedly connected to the upper part of the air inlet pipe 34. In this embodiment, the output shaft of the cylinder 13 extends or retracts, thereby driving the intake pipe 34 to drive the first piston disc 31 to slide upward or downward within the mixing cylinder 21.

[0037] Reference Figure 3 , Figure 4 and Figure 5 In order to enable the stirring blade 24 to oscillate periodically, a sliding hole is provided on the bottom wall of the purification tank 1, and a sliding plate 14 is slidably connected in the sliding hole. The sliding plate 14 is fixedly connected to the upper part of the air inlet pipe 34 and the feed pipe 35. A connecting part is provided on the side wall of the stirring blade 24, and a square hole 28 is provided in the connecting part. A driving rod is connected in the square hole 28. The diameter of the driving rod is smaller than the diameter of the square hole 28. A transmission rod is fixedly provided at one end of the driving rod, and the lower end of the transmission rod is slidably connected to the sliding plate 14. In this embodiment, by setting the sliding disk 14, when the cylinder 13 drives the first piston disk 31 to slide up and down, the sliding disk 14 can drive the transmission rod to move up and down synchronously. Since the stirring blade 24 and the mixing cylinder 21 are connected by a hinge, the transmission rod can drive the stirring blade 24 to swing up and down with the hinge point between it and the mixing cylinder 21 as the center by means of the connecting part in the square hole 28. Since the diameter of the square hole 28 is larger than the diameter of the driving rod, the driving rod will not interfere with the square hole 28 when it drives the stirring blade 24 to swing.

[0038] Reference Figure 4 In order to make the transmission rod slide connected to the sliding plate 14, the upper part of the sliding plate 14 is provided with an annular slide rail 15, and the bottom of the transmission rod is provided with an annular slide groove that matches the annular slide rail 15. In this embodiment, when the mixing cylinder 21 drives the stirring blade 24 to rotate, the stirring blade 24 will drive the transmission rod to rotate. Through the setting of the annular slide rail 15 and the annular slide groove, the bottom of the transmission rod is slidably connected to the upper end face of the sliding disk 14, so that the stirring blade 24 drives the transmission rod to rotate more smoothly.

[0039] In order to enable the second piston disk 44 to move up and down periodically, in this invention, a second piston rod 48 is provided on the upper end surface of the second piston disk 44, and the second piston rod 48 is fixedly connected to the transmission rod. In this embodiment, the second piston rod 48 is fixedly connected to the transmission rod, so that when the transmission rod moves up and down, it can synchronously drive the second piston disc 44 to move up and down through the second piston rod 48.

[0040] Reference Figure 5 In order to enable the auger 22 and the mixing cylinder 21 to rotate in opposite directions, in this invention, a rotating rod 29 is provided at the upper end of the mixing cylinder 21; a rotating hole is provided on the top wall of the purification tank 1, and the mixing cylinder 21 is rotatably connected to the rotating hole through the rotating rod 29; a drive motor 16 is provided on the upper end face of the purification tank 1, and a first bevel gear 17 is provided on the output shaft of the drive motor 16; a second bevel gear 18 and a third bevel gear 19 that mesh with the first bevel gear 17 are respectively sleeved on the rotating rod 29 and the rotating shaft of the auger 22; In this embodiment, the first bevel gear 17 is driven to rotate by the drive motor 16, and the first bevel gear 17 meshes with and drives the second bevel gear 18 and the third bevel gear 19 to rotate, thereby driving the mixing drum 21 and the auger 22 to rotate.

[0041] Reference Figure 5 In order to further promote the purification operation in the mixing cylinder 21, the mixing cylinder 21 is provided with a water inlet hole on its peripheral wall. The water inlet hole is connected to a first one-way valve 110 and the water inlet hole is connected to the space inside the purification tank 1 through the first one-way valve 110. In this embodiment, due to the setting of the water inlet and the first one-way valve 110, and the fact that the diameter of the water inlet is larger than the diameter of the opening of the screen plate, a negative pressure is generated at the bottom of the mixing cylinder 21 when the first piston disc 31 moves downward. At this time, the first one-way valve 110 opens, and the mixture in the purification tank 1 enters the bottom space of the mixing cylinder 21 to promote the premixing of the dehydrating agent, carbon dioxide gas and alcohol-based fuel in the mixing cylinder 21. At the same time, the material in the opening of the screen plate is drawn back into the bottom space of the mixing cylinder 21 to avoid clogging of the screen plate. When the first piston disc 31 moves upward, the first one-way valve 110 closes, and the mixture inside the mixing cylinder 21 cannot enter the purification tank 1 through the first one-way valve 110.

[0042] A method for purifying biomass alcohol-based fuel includes the following steps: S1: The alcohol-based fuel to be purified is transported to the sealed purification tank 1 through the inlet pipe by the suction pump 12; S2: The feed pipe 35 delivers dehydrating agent into the mixing cylinder 21, and the air inlet pipe 34 delivers carbon dioxide gas into the mixing cylinder 21; S3: When the first piston disc 31 moves upward to the limit position, its upper end face is close to the lower end face of the rotating screen disc 23 inside the mixing cylinder 21, and the abrasive particles 27 on the screen disc 23 grind and refine the undissolved dehydrating agent. S4: The rotating screen disk 23 breaks larger carbon dioxide bubbles into smaller bubbles, enhancing their contact efficiency with fuel. The upward movement of the first piston disk 31 can also flush the screen holes of the screen disk 23 with gas, preventing blockage. S5: The screw conveyor 22 lifts the material at the top of the mixing drum 21, and the material is evenly sprayed into each layer of the purification tank 1 through the conveying pipe 25 on the stirring blade 24. S6: After completion, the suction pump 11 will output the finished product in the purification tank 1 through the collection pipe.

[0043] The implementation principle of a biomass alcohol-based fuel purification device according to an embodiment of the present invention is as follows: Alcohol-based fuel is pumped into purification tank 1 by suction pump 12, and the alcohol-based fuel in purification tank 1 enters mixing cylinder 21 through the top opening of mixing cylinder 21; at this time, dehydrating agent and carbon dioxide gas are pumped into mixing cylinder 21 through feed hole 32 and air inlet 33 respectively. The drive motor 16 drives the first bevel gear 17 to rotate, and the first bevel gear 17 meshes with and drives the second bevel gear 18 and the third bevel gear 19 to rotate, thereby driving the mixing drum 21 and the auger 22 to rotate. Cylinder 13 drives the first piston disc 31 and sliding disc 14 to reciprocate up and down. Sliding disc 14 drives the transmission rod, which in turn drives the second piston disc 44 to reciprocate up and down. Since the stirring blade 24 is connected to the mixing cylinder 21 by a hinge, the transmission rod can drive the stirring blade 24 to swing up and down with the hinge point between it and the mixing cylinder 21 as the center by means of the connecting part in the square hole 28. While the stirring blade 24 is rotating up and down, it can also disturb the mixture in the purification tank 1 in the up and down direction, so that the mixture can be fully mixed. The first piston disc 31, through the turbulence generated by its reciprocating motion within the mixing cylinder 21, initially mixes the alcohol-based fuel, dehydrating agent, and carbon dioxide gas at the bottom of the mixing cylinder 21. Simultaneously, when the first piston disc 31 moves upward to its limit position, the space between the first piston disc 31 and the sieve disc 23 narrows. Dehydrating agent that cannot pass through the sieve holes is retained in the space between the first piston disc 31 and the sieve disc 23. The abrasive particles 27 on the rotating sieve disc 23 cooperate with the first piston disc 31 to grind the dehydrating agent, making the particle size of the dehydrating agent finer and easier to dissolve with water in the alcohol-based fuel. The reciprocating motion of the first piston disc 31 also causes the mixture to flush the sieve holes of the sieve disc 23, preventing clogging of the sieve holes. The first piston disc 31 is driven by the cylinder 13 to reciprocate. The reciprocating frequency can be set to 10-20 times / minute. When the piston moves upward to the limit position, the gap between its upper end face and the lower end face of the screen disc 23 is controlled at 0.1-0.5mm (the conventional gap design of grinding equipment in this field). At this time, the undissolved dehydrating agent particles are squeezed between the piston end face, abrasive particles and screen disc. With the continuous rotation of the screen disc, the abrasive particles continuously grind the particles (not "instantaneous contact", but a grinding contact time of about 5 seconds each time the piston moves upward, which can be achieved by controlling the cylinder stroke), ensuring that the undissolved dehydrating agent particles are refined to below 0.1mm to meet the subsequent dissolution requirements. Carbon dioxide has limited solubility in alcohol-based fuels, and undissolved carbon dioxide exists in the form of bubbles. Due to the buoyancy of the bubbles, even if the density of carbon dioxide is greater than that of air, the bubbles will still float upwards to the top of the purification tank 1. Therefore, there is undissolved carbon dioxide gas at the top of the purification tank. The rotating screen 23 breaks larger carbon dioxide bubbles into smaller bubbles, making it easier for the alcohol-based fuel to pass through the screen holes of the screen 23 and enter the upper part of the mixing cylinder 21. After entering the upper part of the mixing cylinder 21, the alcohol-based fuel is lifted by the screw conveyor 22 and enters the purification tank 1. Then, it enters each layer of the purification tank 1 through the feed pipe 25 on the stirring blade 24 and the spray holes on the feed pipe 25. When the second piston disc 44 slides upward inside the suction cylinder 41, the space between the second piston disc 44 and the bottom wall of the suction cylinder 41 increases, and a negative pressure is generated inside the suction cylinder 41. The carbon dioxide gas at the top of the purification tank 1 and the undissolved dehydrating agent at the bottom of the purification tank 1 are drawn into the suction cylinder 41 through the suction pipe 42. Due to the setting of the second check valve 46, when the suction cylinder 41 is being suctioned by the second piston disc 44, the mixture in the discharge pipe 43 will not flow back into the suction cylinder 41 under the action of negative pressure. When the second piston disc 44 slides downward, the space between the second piston disc 44 and the bottom wall of the suction cylinder 41 is continuously compressed. The mixture in the suction cylinder 41 enters the mixing cylinder 21 through the discharge pipe 43 under the downward pressure of the second piston disc 44. Due to the setting of the first check valve 45, the mixture in the suction cylinder 41 will not flow back into the suction pipe 42 when the second piston disc 44 slides downward. The solubility of dehydrating agents (such as calcium chloride) in alcohol-based fuels has an upper limit. When the amount of dehydrating agent added exceeds the solubility, undissolved fine particles will still be produced. Under the action of gravity, these particles will slowly settle to the bottom of the purification tank, forming a precipitate that can be sucked up. The gas and dehydrating agent that re-enter the mixing cylinder 21 are further ground up by the rotating screen disk 23 and the first piston disk 31. The dehydrating agent with poor solubility is broken down into small bubbles, and then it re-enters the upper part of the mixing cylinder 21. In conjunction with the up-and-down swinging stirring blades 24, it re-enters each layer of the purification tank 1 through the spray holes on the conveying pipe 25. After water absorption is completed, the suction pump 11 outputs the finished product in the purification tank 1 through the collection pipe, and then filters out the calcium chloride and insoluble impurities after water absorption from the alcohol-based fuel.

[0044] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A biomass alcohol-based fuel purification device, comprising a purification tank (1) and a collection pipeline in communication with the purification tank (1) through a suction and discharge pump (11), characterized in that: The purification tank (1) is communicated with a liquid inlet pipeline through a suction pump (12); the purification tank (1) is internally provided with a mixing mechanism (2), a feeding mechanism (3) and an anti-settling mechanism (4); The mixing mechanism (2) comprises a mixing cylinder (21) which is open at both top and bottom and can rotate in the purification tank (1), and an auger (22) located inside the mixing cylinder (21), the rotating direction of the auger (22) being opposite to that of the mixing cylinder (21); a sieve plate (23) is arranged at the bottom of the rotating shaft of the auger (22), a plurality of sieve holes are arranged on the sieve plate (23), and abrasive particles (27) are arranged in the area between adjacent sieve holes; a stirring blade (24) is further hinged outside the mixing cylinder (21), and a material conveying pipe (25) which is communicated with the inside of the mixing cylinder (21) is arranged on the stirring blade (24); The feeding mechanism (3) comprises a first piston plate (31) which reciprocally slides in the mixing cylinder (21), and a feeding hole (32) and an air inlet hole (33) are arranged on the first piston plate (31); The anti-settling mechanism (4) comprises a suction cylinder (41) arranged on the outer wall of the mixing cylinder (21), the suction cylinder (41) is respectively communicated with a material suction pipeline (42) and a material discharge pipeline (43), the material suction end of the material suction pipeline (42) is located at the top of the mixing cylinder (21), and the material discharge end of the material discharge pipeline (43) is communicated with the space formed between the sieve plate (23) and the first piston plate (31) in the mixing cylinder (21).

2. The biomass alcohol-based fuel purification device according to claim 1, characterized in that: The purification tank (1) is sealingly arranged; the suction cylinder (41) is communicated with an air suction pipeline (47), the air suction end of the air suction pipeline (47) is located at the top of the mixing cylinder (21); the material suction pipeline (42), the air suction pipeline (47) and the material discharge pipeline (43) are communicated with the lower inner cavity of the suction cylinder (41); the material suction pipeline (42) is communicated with the suction cylinder (41) through a first check valve (45); the material discharge pipeline (43) is communicated with the suction cylinder (41) through a second check valve (46); and the second piston plate (44) is slidingly connected in the suction cylinder (41).

3. The biomass alcohol-based fuel purification device according to claim 1, characterized in that: The air inlet hole (33) and the feeding hole (32) on the first piston plate (31) are respectively provided with an air inlet pipeline (34) and a feeding pipeline (35); the air inlet pipeline (34) is communicated with an external gas storage tank through a gas pump; and the feeding pipeline (35) is communicated with an external dehydrating agent storage tank through a material conveying pump.

4. The biomass alcohol-based fuel purification device according to claim 3, characterized in that: A gas cylinder (13) is fixedly arranged at the bottom of the purification tank (1), and the output shaft of the gas cylinder (13) is fixedly connected with the air inlet pipeline (34).

5. A biomass alcohol-based fuel purification device according to claim 4, characterized in that: The bottom wall of the purification tank (1) is provided with a sliding hole, a sliding disc (14) is slidably connected in the sliding hole, and the sliding disc (14) is fixedly connected with the upper portions of the gas inlet pipeline (34) and the feed inlet pipeline (35); the side wall of the stirring blade (24) is provided with a connecting portion, a square hole (28) is formed in the connecting portion, a driving rod is connected in the square hole (28), the diameter of the driving rod is smaller than the diameter of the square hole (28), a transmission rod is fixedly arranged at one end of the driving rod, and the lower end of the transmission rod is slidably connected with the sliding disc (14). An annular sliding rail (15) is arranged at the upper portion of the sliding disc (14), and the bottom of the transmission rod is provided with an annular sliding groove matched with the annular sliding rail (15).

6. The biomass alcohol-based fuel purification device according to claim 1, wherein: The outer wall of the mixing cylinder (21) is provided with a hinged seat (26), one end of the stirring blade (24) is provided with a hinged rod, and the stirring blade (24) is hinged with the outer wall of the mixing cylinder (21); one end of the material conveying pipe (25) is communicated with the inside of the mixing cylinder (21) through a corrugated pipe; and the outer wall of the material conveying pipe (25) is provided with a material spraying hole.

7. The biomass alcohol-based fuel purification device according to claim 1, wherein: The upper end surface of the second piston disc (44) is provided with a second piston rod (48), and the second piston rod (48) is fixedly connected with the transmission rod.

8. The biomass alcohol-based fuel purification device according to claim 2, characterized in that: The upper end portion of the mixing cylinder (21) is provided with a rotating rod (29); the top wall of the purification tank (1) is provided with a rotating hole, and the mixing cylinder (21) is rotatably connected with the rotating hole through the rotating rod (29); the upper end surface of the purification tank (1) is provided with a driving motor (16), and the output shaft of the driving motor (16) is provided with a first bevel gear (17); the rotating rod (29) and the rotating shaft of the auger (22) are respectively sleeved with a second bevel gear (18) and a third bevel gear (19) meshing with the first bevel gear (17).

9. The biomass alcohol-based fuel purification device according to claim 1, characterized in that: The peripheral wall of the mixing cylinder (21) is provided with a water inlet hole, and a first check valve (110) is arranged on one side of the water inlet hole; the water inlet hole is communicated with the space inside the purification tank (1) through the first check valve (110).

10. A method for purification of biomass alcohol-based fuel using the apparatus for purification of biomass alcohol-based fuel according to claim 9, characterized by: The method comprises the following steps: S1: the alcohol-based fuel to be purified is delivered into the sealed purification tank (1) through the liquid inlet pipeline by the suction pump (12); S2: the dehydration agent is delivered into the mixing cylinder (21) through the feed inlet pipeline (35), and the carbon dioxide gas is delivered into the mixing cylinder (21) through the gas inlet pipeline (34); S3: when the first piston disc (31) moves upward to the limit position, the upper end surface thereof is close to the lower end surface of the sieve disc (23) rotating in the mixing cylinder (21), and the abrasive particles (27) on the sieve disc (23) grind and refine the undissolved dehydration agent; S4: the rotating sieve disc (23) breaks the larger carbon dioxide bubbles into small bubbles, thereby enhancing the contact efficiency with the fuel, and the upward movement of the first piston disc (31) can flush the sieve holes of the sieve disc (23) through the gas, thereby avoiding blockage; S5: the auger (22) lifts the material on the upper portion of the mixing cylinder (21), and the material is uniformly sprayed into each layer of the purification tank (1) through the material conveying pipe (25) on the stirring blade (24); S6: after the completion, the suction and discharge pump (11) outputs the finished product in the purification tank (1) through the collection pipeline.

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