Fractionation equipment and fractionation method for pure biodiesel

Abstract

The invention relates to fractionation equipment and a fractionation method for pure biodiesel, and belongs to the technical field of fractionation of pure biodiesel, the fractionation equipment comprises a heating box, a feeding pipe arranged on the outer wall of the heating box, a conveying pipe arranged on the outer wall of the heating box, a fractionating tower fixedly connected to one end of the conveying pipe, a first filter tower tray arranged in the fractionating tower, and a second filter tower tray arranged in the fractionating tower, a first filtering tower tray is arranged in the fractionating tower, a second filtering tower tray located above the first filtering tower tray is arranged in the fractionating tower, a third filtering tower tray located above the second filtering tower tray is arranged in the fractionating tower, a servo motor is arranged at the top of the fractionating tower, and the output end of the servo motor is fixedly connected with a first bevel gear. The knocking rods and the knocking blocks can synchronously crush and clean coking impurities existing at the bottom of the fractionating tower when the fractionating tower is used for fractionating diesel oil, so that the phenomenon that more coking impurities are generated at the bottom of the fractionating tower and the fractionating quality of subsequent pure biodiesel is influenced is prevented.

Description

Technical Field

[0001] This invention relates to the manufacture of high-density, solid, gas, and clean fermentation technology equipment and production equipment, and more specifically to the field of pure biodiesel fractionation technology. In particular, it relates to a fractionation device and fractionation method for pure biodiesel. Background Technology

[0002] Fractionation is a method for separating mixtures with different boiling points. It belongs to the field of high-density, solid, gas, and clean fermentation technology equipment and production equipment manufacturing. No new substances are generated during fractionation; it only separates the original substances. It is a physical change. Fractionation involves heating a mixture and then cooling and separating the components into relatively pure single substances based on their different boiling points. In the production and processing of pure biodiesel, fractionation equipment is required to perform fractionation processing on the pure biodiesel.

[0003] In the prior art, a fractionation device for pure biodiesel, with publication number CN118685225A, includes a mounting plate and a fractionation assembly disposed above the mounting plate. The fractionation assembly includes a vibration mechanism fixedly mounted on the bottom of the mounting plate. The vibration mechanism includes a support frame fixedly mounted on the bottom of the mounting plate. A motor is fixedly mounted on the inner wall of the support frame. The vibration mechanism is connected to a striking mechanism, and a stirring mechanism is disposed on the side of the striking mechanism. By setting the vibration mechanism, vibration can be generated through the fractionation tank to improve the stirring and fractionation effect of the device on pure biodiesel. By setting the striking mechanism, the fractionation tank can be struck by striking blocks to shake off the pure biodiesel attached to the inner wall of the fractionation tank. By setting the stirring mechanism, the pure biodiesel inside the fractionation tank can be fully stirred and heated to achieve the effect of fractionation of pure biodiesel.

[0004] In the prior art, a light biodiesel fractionation device with publication number CN220176079U includes a heating box and a fractionation tower connected to the heating box. A drive motor is fixed to the top of the heating box, and a stirring mechanism driven by the drive motor is installed inside the heating box. A support mechanism for supporting the stirring mechanism is installed on the bottom inner wall of the heating box. The stirring mechanism includes a rotating shaft fixed coaxially with the drive motor. Horizontal stirring rods are fixed at equal intervals on the outer wall of the rotating shaft. One end of each horizontal stirring rod is rotatably connected to a vertical stirring rod via a connecting mechanism. A baffle is fixed to the top of the vertical stirring rod. The support mechanism includes a base plate with an opening in the middle of the bottom inner wall of the heating box. A groove is provided on the top of the base plate. This utility model effectively solves the problems mentioned in the background art, thereby realizing the rotation and revolution of the vertical stirring rod, while the horizontal stirring rod revolves, improving the stirring effect, ensuring uniform heating, and increasing the fractionation efficiency.

[0005] However, while the aforementioned pure biodiesel fractionation equipment can deliver pure biodiesel to the fractionation tower for fractionation processing, the bottom of the tower easily adsorbs coking impurities during daily use. Simultaneous crushing, loosening, and scraping of these impurities is ineffective, leading to a buildup of coking impurities during prolonged biodiesel processing, which affects the purity and quality of the biodiesel fractionation. Furthermore, the simultaneous tapping and cleaning of the filter trays during daily use is ineffective, easily causing blockages and hindering the smooth flow of pure biodiesel. Additionally, the fractionation process generates heat, and the multi-stage heat recovery process is ineffective, resulting in heat loss and reducing the heat recovery efficiency of the tower, increasing resource consumption and failing to meet user needs. Therefore, we propose a fractionation equipment and method for pure biodiesel. Summary of the Invention

[0006] To address the problems mentioned in the background, this invention provides a fractionation device and method for pure biodiesel, solving the problems raised in the background art such as the easy adsorption of coking impurities at the bottom of the fractionation tower during daily use, poor simultaneous crushing, loosening, and scraping of coking impurities generated at the bottom of the fractionation tower, poor simultaneous tapping and sludge removal of the filter tower trays, and easy clogging of the filter tower trays, which affects the smooth flow of pure biodiesel. Furthermore, the fractionation tower easily generates heat during the fractionation of pure biodiesel, and the multi-stage purification and recovery of heat is ineffective, resulting in heat loss and affecting the heat recovery and utilization rate of the fractionation tower.

[0007] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows: A fractionation device for pure biodiesel includes a heating chamber, a feeding pipe on the outer wall of the heating chamber, a conveying pipe on the outer wall of the heating chamber, a fractionation tower fixedly connected to one end of the conveying pipe, a first filter tray inside the fractionation tower, a second filter tray above the first filter tray inside the fractionation tower, a third filter tray above the second filter tray inside the fractionation tower, a servo motor at the top of the fractionation tower, a first bevel gear fixedly connected to the output end of the servo motor, a first rotating shaft fixedly connected to the outer wall of the first bevel gear, a second bevel gear meshing with the outer wall of the first bevel gear, a third bevel gear meshing with the outer wall of the second bevel gear, a second rotating shaft sleeved on the outer wall of the third bevel gear, and a fixed disk rotatably connected to the inner wall of the fractionation tower fixedly connected to the outer wall of the second rotating shaft. A striking component is provided below the fixed plate, a clearing component is provided below the first filter tower plate, and a recovery component is provided at the top of the fractionation tower. The unblocking assembly includes a second gear, a striking rod, and a striking block. The second gear is rotatably connected to the outer wall of the fixed disc, and a fixed column is fixedly connected to the outer wall of the second gear. A reciprocating rod is slidably connected to the outer wall of the fixed column and to the outer wall of the fixed disc. A striking rod is fixedly connected to one end of the reciprocating rod, and a striking block is fixedly connected to the outer wall of the striking rod. A connecting scraper that fits against the bottom of the fractionation tower is fixedly connected to the outer wall of the first rotating shaft. The striking rod and striking block can simultaneously crush and clean the coking impurities present at the bottom of the fractionation tower when the pure biodiesel is fractionated through the fractionation tower, preventing the generation of too many coking impurities at the bottom of the fractionation tower, which would affect the quality of subsequent pure biodiesel fractionation.

[0008] Preferably, the inner wall of the second rotating shaft is provided with a connection port at the connection point between it and the first rotating shaft, and the inner wall contour of the connection port is larger than the outer wall contour of the first rotating shaft.

[0009] Preferably, the inner wall of the distillation tower is fixedly connected with a limiting rod that fits against the surface of the fixed plate.

[0010] Preferably, the outer wall of the first rotating shaft is fixedly connected to a first gear that meshes with the outer wall of the second gear, and a limit groove is provided at the connection between the outer wall of the reciprocating rod and the fixed column.

[0011] Preferably, the striking blocks are distributed in a straight line on the surface of the striking rod, and the contact area between the outer wall of the striking blocks and the inner wall of the distillation tower is conical.

[0012] Preferably, the unblocking component includes a telescopic rod and a striking plate. A connecting plate fitted onto the outer wall of the second rotating shaft is fixedly connected to the inner wall of the fractionation tower. A bevel gear set is fixedly connected to the outer wall of the second rotating shaft. A turntable is fixedly connected to the outer wall of the bevel gear set. A pulling rod is rotatably connected to the outer wall of the turntable. A connecting rod is rotatably connected to one end of the pulling rod. A telescopic rod fixedly connected to the outer wall of the connecting rod and the outer wall of the connecting rod are fixedly connected to the telescopic rod. A striking block located below the first filter tower plate is fixedly connected to the outer wall of the connecting rod after the pure biodiesel feedstock has been fractionated in the fractionation tower. This prevents coking impurities from accumulating at the bottom of the fractionation tower and affecting the subsequent fractionation quality of the pure biodiesel. The first rotating shaft drives the first gear to rotate, which in turn drives the second gear to rotate. The reciprocating motion of the second gear and the striking rod and striking block loosens the inner wall at the bottom of the fractionation tower. Simultaneously, the connecting scraper rotates, scraping away and cleaning the coking impurities.

[0013] Preferably, the outer wall contour of the striking block is arranged in a ring shape, and the unblocking components are respectively arranged below the first filter tray, the second filter tray, and the third filter tray.

[0014] Preferably, the recovery assembly includes a recovery nozzle and a reflux pipe. An annular pipe is fixedly connected to the inner wall of the fractionation tower, and a recovery nozzle is fixedly connected to the outer wall of the annular pipe. A recovery pipe extending to the outside of the fractionation tower is fixedly connected to the outer wall of the annular pipe. A connecting cylinder is fixedly connected to one end of the recovery pipe. A filter screen is installed inside the connecting cylinder. A suction fan rotatably connected to the inner wall of the connecting cylinder is fixedly connected to the outer wall of the second conical gear. A connecting pipe is fixedly connected to the outer wall of the connecting cylinder. A dust collection box is fixedly connected to one end of the connecting pipe. A connecting pipe is fixedly connected to the outer wall of the dust collection box. A drying cylinder is fixedly connected to one end of the connecting pipe. A reflux pipe fixedly connects to the outer wall of the heating box. The reflux pipe allows the heat generated inside the fractionation tower to be transported through the recovery nozzle to the connecting cylinder during long-term processing of pure biodiesel. After multiple purification processes including filtration, dust removal, and drying, the heat is then transported to the heating box through the reflux pipe, achieving the effect of heat recovery and utilization.

[0015] Preferably, the dust removal box is provided with a negative electrode roller and a positive electrode plate, the drying cylinder is provided with a drying agent, the heating box is provided with a heat storage chamber, and the reflux pipe is connected to the heat storage chamber inside the heating box, and the outer wall of the fractionation tower is provided with a purification port.

[0016] A fractionation method for pure biodiesel includes the following steps: Step S1: The pure biodiesel feedstock to be processed is transported to the heating box through the feeding pipe for preheating treatment, and after the feedstock is heated, it is transported to the fractionation tower through the conveying pipe for multiple fractionation processing. Step S2: After the pure biodiesel feedstock is fractionated in the fractionation tower, to prevent coking impurities from accumulating at the bottom of the fractionation tower and affecting the subsequent fractionation quality of the pure biodiesel, the first shaft drives the first gear to rotate, which in turn drives the second gear to rotate. The rotation of the second gear, through the reciprocating motion of the striking rod and striking block, loosens the inner wall at the bottom of the fractionation tower by striking, and with the synchronous rotation of the connecting scraper, the coking impurities are scraped off and cleaned. Step S3: When the pure biodiesel is subjected to multiple fractionation treatment through the filter tower tray, the turntable drives the striking plate to reciprocate and lift, so that the striking plate repeatedly hits and contacts the surface of the filter tower tray, so that the impurities adsorbed by the mesh on the surface of the filter tower tray are simultaneously hit, cleared and cleaned, and the smooth flow of pure biodiesel fractionation is improved. Step S4: During the fractionation of pure biodiesel in the fractionation tower, the heat generated during fractionation is transferred to the connecting cylinder through the recovery nozzle and reflux pipe. The recovered heat is then transferred to the reflux pipe through the dust removal box and drying cylinder by the suction fan, and then to the heating box, so as to heat the interior of the heating box and convert and recover the heat generated during fractionation.

[0017] Compared with the prior art, the beneficial effects of this invention are as follows: 1. The striking rod and striking block provided in this invention can simultaneously crush and clean the coking impurities present at the bottom of the fractionation tower when pure biodiesel is fractionated, preventing the generation of too many coking impurities at the bottom of the fractionation tower, which would affect the quality of subsequent pure biodiesel fractionation.

[0018] 2. The tapping plate provided in this invention can simultaneously tap and clear the surface of the filter tray during the fractionation of pure biodiesel through the filter tray-assisted fractionation tower, preventing the mesh of the filter tray from becoming clogged after long-term use, which would affect the fractionation flow effect inside the tower.

[0019] 3. The reflux pipe of this invention can transfer the heat generated in the distillation tower to the connecting cylinder through the recovery nozzle when pure biodiesel is processed for a long time. After multiple purification treatments such as filtration, dust removal and drying, the heat is transferred to the heating box through the reflux pipe, thus achieving the effect of heat recovery and utilization. Attached Figure Description

[0020] Figure 1 A 3D physical image of a fractionation device and fractionation method for pure biodiesel; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the overall side view structure of the present invention; Figure 4 This is a schematic diagram of the overall internal structure of the present invention; Figure 5 This is a schematic diagram of the positional distribution structure of the first gear and the second gear of the present invention; Figure 6 This is a schematic diagram of the positional distribution of the striking rod and striking block according to the present invention; Figure 7 This is a schematic diagram of the internal structure of the connecting cylinder of the present invention; Figure 8 This is a cross-sectional view of the connection between the first and second rotating shafts of the present invention; Figure 9 This is a schematic diagram of the first bevel gear and the second bevel gear of the present invention; Figure 10This is a schematic diagram of the striking plate position distribution structure of the present invention; Figure 11 This is a schematic diagram of the turntable and pull rod structure of the present invention; Figure 12 This is a schematic diagram of the reflux pipe location distribution structure of the present invention.

[0021] The labels in the attached diagram are: 1. Heating box; 2. Feeding pipe; 3. Conveying pipe; 4. Fractionating tower; 5. First filter tray; 6. Second filter tray; 7. Third filter tray; 8. Servo motor; 9. First bevel gear; 10. First rotating shaft; 11. Second bevel gear; 12. Third bevel gear; 13. Second rotating shaft; 14. Fixed plate; 15. Limiting rod; 16. Striking assembly; 1601. First gear; 1602. Second gear; 1603. Fixed column; 1604. Reciprocating rod; 1605. Limiting groove; 1606. Striking rod; 1607. Striking block; 1608. 17. Connecting scraper; 17. Unblocking assembly; 1701. Connecting disc; 1702. Bevel gear set; 1703. Turntable; 1704. Pull rod; 1705. Connecting rod; 1706. Telescopic rod; 1707. Striking plate; 18. Recycling assembly; 1801. Ring pipe; 1802. Recycling nozzle; 1803. Recycling pipe; 1804. Connecting cylinder; 1805. Filter screen; 1806. Suction fan; 1807. Connecting pipe; 1808. Dust collection box; 1809. Connecting pipe; 1810. Drying cylinder; 1811. Return pipe; 19. Impurity removal port. Detailed Implementation

[0022] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below. Example

[0023] Please see Figures 1 to 12This invention relates to high-density, solid-state, gaseous, and clean fermentation technology equipment and production-specific equipment, providing a fractionation device and method for pure biodiesel. The device includes a heating chamber 1, a feeding pipe 2 on the outer wall of the heating chamber 1, a conveying pipe 3 on the outer wall of the heating chamber 1, a fractionation tower 4 fixedly connected to one end of the conveying pipe 3, a first filter tray 5 inside the fractionation tower 4, a second filter tray 6 located above the first filter tray 5 inside the fractionation tower 4, and a third filter tray 6 located above the second filter tray 6 inside the fractionation tower 4. A servo motor 8 is installed at the top of the tray 7 and the fractionation column 4. A first bevel gear 9 is fixedly connected to the output end of the servo motor 8. A first rotating shaft 10 is fixedly connected to the outer wall of the first bevel gear 9. A second bevel gear 11 meshes with the outer wall of the first bevel gear 9. A third bevel gear 12 meshes with the outer wall of the second bevel gear 11. A second rotating shaft 13 is fixedly connected to the outer wall of the third bevel gear 12 and sleeved on the outer wall of the first rotating shaft 10. A fixed disk 14 that is rotatably connected to the inner wall of the fractionation column 4 is fixedly connected to the outer wall of the second rotating shaft 13. A striking component 16 is provided below the fixed plate 14, a clearing component 17 is provided below the first filter tower plate 5, and a recovery component 18 is provided at the top of the fractionation tower 4. The unblocking component 17 includes a second gear 1602, a striking rod 1606, and a striking block 1607. The second gear 1602 is rotatably connected to the outer wall of the fixed disk 14. A fixed column 1603 is fixedly connected to the outer wall of the second gear 1602. A reciprocating rod 1604 is slidably connected to the outer wall of the fixed column 1603 and is slidably connected to the outer wall of the fixed disk 14. One end of the reciprocating rod 1604 is fixedly connected to the striking rod 1606. The striking block 1607 is fixedly connected to the outer wall of the striking rod 1606. A connecting scraper 1608 that fits against the bottom of the fractionation tower 4 is fixedly connected to the outer wall of the first rotating shaft 10. The striking rod 1606 and the striking block 1607 are configured to clean the residue at the bottom of the fractionation tower 4 during the fractionation of pure biodiesel. To prevent excessive coking impurities from forming at the bottom of the fractionation tower 4 and affecting the subsequent fractionation quality of pure biodiesel, the servo motor 8 is turned on, which drives the first rotating shaft 10 to rotate via the rotation of the first bevel gear 9. The rotation of the first rotating shaft 10, through the connection of the first gear 1601, drives the second gear 1602 to rotate. The rotation of the second gear 1602 causes the fixed column 1603 to slide back and forth along the inner wall of the limiting groove 1605, and also causes the striking rod 1606, which is fixedly connected to the reciprocating rod 1604, to slide back and forth. At the same time, it drives the striking block 1607 to reciprocate and strike the inner wall of the bottom of the fractionation tower 4. Under the action of the connecting scraper 1608, the loosened coking impurities are scraped off and cleaned.

[0024] like Figure 8As shown, the inner wall of the second rotating shaft 13 is provided with a connection port at the connection point with the first rotating shaft 10, and the inner wall contour of the connection port is larger than the outer wall contour of the first rotating shaft 10. This facilitates the effect of driving the first rotating shaft 10 and the second rotating shaft 13 to rotate synchronously without interference, by providing a connection port at the connection point between the inner wall of the second rotating shaft 13 and the first rotating shaft 10.

[0025] like Figure 8 As shown, a limiting rod 15 that fits against the surface of the fixed plate 14 is fixedly connected to the inner wall of the fractionation tower 4. This helps to improve the stability of the rotational motion of the fixed plate 14.

[0026] like Figures 6-8 As shown, the outer wall of the first rotating shaft 10 is fixedly connected to a first gear 1601 that meshes with the outer wall of the second gear 1602. A limiting groove 1605 is provided at the connection between the outer wall of the reciprocating rod 1604 and the fixed column 1603. This facilitates the reciprocating rod 1604 to reciprocate and extend through the setting of the first gear 1601 and the limiting groove 1605.

[0027] like Figure 6 and Figure 8 As shown, the striking blocks 1607 are distributed in a straight line on the surface of the striking rod 1606. The outer wall of the striking blocks 1607 and the inner wall of the fractionation tower 4 are in a conical shape. This conical shape of the outer wall of the striking blocks 1607 and the inner wall of the fractionation tower 4 facilitates the loosening and cleaning of coking impurities adsorbed on the inner wall of the fractionation tower 4.

[0028] like Figure 10 and Figure 11As shown, the unblocking component 17 includes a telescopic rod 1706 and a striking plate 1707. A connecting plate 1701, sleeved on the outer wall of the second rotating shaft 13, is fixedly connected to the inner wall of the fractionation tower 4. A bevel gear set 1702 is fixedly connected to the outer wall of the second rotating shaft 13. A turntable 1703 is fixedly connected to the outer wall of the bevel gear set 1702. A pulling rod 1704 is rotatably connected to the outer wall of the turntable 1703. A connecting rod 1705 is rotatably connected to one end of the pulling rod 1704. A telescopic rod 1706, fixedly connected to the outer wall of the connecting plate 1701, is fixedly connected to the bottom of the connecting rod 1705. A striking block 1607 located below the first filter tower tray 5 is fixedly connected to the outer wall of the connecting rod 1705. The striking plate 1607 is also provided. 707, when the filter tray assists the fractionation tower 4 in the fractionation of pure biodiesel, it can simultaneously tap and unclog the surface of the filter tray 4 to prevent the mesh of the filter tray 4 from becoming clogged after long-term use, which would affect the fractionation flow effect in the tower. The connection of the second rotating shaft 13 drives the bevel gear set 1702 to rotate. The rotation of the bevel gear set 1702 drives the turntable 1703 to rotate synchronously. The rotation of the turntable 1703, through the rotation connection of the pull rod 1704, drives the connecting rod 1705, which is fixedly connected to the telescopic rod 1706, to perform a reciprocating lifting motion, and drives the striking plate 1707 to reciprocate and tap the surface of the filter tray, thereby unclogging and cleaning the surface of the filter tray.

[0029] like Figure 10 and Figure 11 As shown, the outer wall contour of the striking block 1607 is arranged in a ring shape. The unblocking components 17 are respectively arranged below the first filter tower plate 5, the second filter tower plate 6 and the third filter tower plate 7. This facilitates the simultaneous unblocking of multiple parts of the filter tower plate surface by means of the ring-shaped outer wall contour of the striking block 1607.

[0030] like Figure 7 , Figure 9 and Figure 12As shown, the recovery assembly 18 includes a recovery nozzle 1802 and a reflux pipe 1811. An annular pipe 1801 is fixedly connected to the inner wall of the fractionation tower 4. The recovery nozzle 1802 is fixedly connected to the outer wall of the annular pipe 1801. A recovery pipe 1803 extending to the outside of the fractionation tower 4 is fixedly connected to the outer wall of the annular pipe 1801. A connecting cylinder 1804 is fixedly connected to one end of the recovery pipe 1803. A filter screen 1805 is installed inside the connecting cylinder 1804. A suction fan 1806, rotatably connected to the inner wall of the connecting cylinder 1804, is fixedly connected to the outer wall of the second bevel gear 11. A connecting pipe 1807 is fixedly connected to the outer wall of the connecting cylinder 1804. A dust collector 1808 is fixedly connected to one end of the connecting pipe 1807. A connecting pipe 1809 is fixedly connected to the outer wall of the dust collector 1808. A drying cylinder 1810 is fixedly connected to one end of the connecting pipe 1809. A reflux pipe, fixedly connected to the outer wall of the heating box 1, is fixedly connected to the outer wall of the drying cylinder 1810. The reflux pipe 1811, when pure biodiesel is processed for an extended period through the fractionation tower 4, transfers the heat generated within the tower to the connecting cylinder 1804 via the recovery nozzle 1802. After undergoing multiple purification processes including filtration, dust removal, and drying, the heat is then transferred to the heating box 1 via the reflux pipe 1811, achieving the effect of heat recovery and utilization. The rotation of the second bevel gear 11 drives the suction fan 1806 to rotate synchronously. With the connection of the recovery pipe 1803, the heat in the fractionation tower 4 is recovered to the connecting cylinder 1804 via the recovery nozzle 1802. The heat is then transferred to the dust removal box 1808 and the drying cylinder 1810 for multiple purification processes via the connecting pump installed on the outer wall of the reflux pipe 1811. Under the action of the reflux pipe 1811, the purified heat is transferred to the heating box 1 for preheating, achieving the effect of heat conversion, recovery, and utilization, and improving the energy efficiency of the fractionation equipment.

[0031] like Figure 8 and Figure 12 As shown, the dust collector 1808 is equipped with a negative electrode roller and a positive electrode plate, the drying cylinder 1810 is equipped with a drying agent, the heating box 1 has a heat storage chamber, and the reflux pipe 1811 is connected to the heat storage chamber inside the heating box 1. The outer wall of the fractionation tower 4 is equipped with a cleaning port 19, which facilitates the connection between the reflux pipe 1811 and the heat storage chamber inside the heating box 1, thereby achieving the effect of heat conversion and recovery, and improving the energy efficiency of the fractionation equipment.

[0032] A fractionation method for pure biodiesel includes the following steps: Step S1: The pure biodiesel feedstock to be processed is transported to the heating box 1 through the feeding pipe 2 for preheating treatment, and after the feedstock is heated, it is transported to the fractionation tower 4 through the conveying pipe 3 for multiple fractionation processing. Step S2: After the pure biodiesel feedstock is fractionated in the fractionation tower 4, to prevent coking impurities from accumulating at the bottom of the fractionation tower 4 and affecting the subsequent fractionation quality of the pure biodiesel, the first rotating shaft 10 drives the first gear 1601 to rotate, which in turn drives the second gear 1602 to rotate. The rotation of the second gear 1602, through the reciprocating motion of the striking rod 1606 and the striking block 1607, knocks and loosens the inner wall at the bottom of the fractionation tower 4, and with the synchronous rotation of the connecting scraper 1608, the coking impurities are scraped and cleaned. Step S3: When the pure biodiesel is subjected to multiple fractionation treatment through the filter tower tray, the turntable 1703 drives the striking plate 1707 to reciprocate upward movement, so that the striking plate 1707 reciprocates and contacts the surface of the filter tower tray, so that the impurities adsorbed by the mesh on the surface of the filter tower tray are simultaneously knocked and cleared, thereby improving the smooth flow of pure biodiesel fractionation.

[0033] Step S4: During the fractionation of pure biodiesel in the fractionation tower 4, the heat generated during fractionation in the fractionation tower 4 is transferred to the connecting cylinder 1804 through the recovery nozzle 1802 and the reflux pipe 1811. The recovered heat is then transferred to the reflux pipe 1811 through the dust removal box 1808 and the drying cylinder 1810, and finally to the heating box 1, so as to heat the interior of the heating box 1 and convert and recover the heat generated during fractionation.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A fractionation device for pure biodiesel, comprising a heating chamber (1), characterized in that: The heating box (1) is provided with a feeding pipe (2) on its outer wall and a conveying pipe (3) on its outer wall. One end of the conveying pipe (3) is fixedly connected to a fractionating tower (4). The fractionating tower (4) is provided with a first filter tray (5) inside. The fractionating tower (4) is provided with a second filter tray (6) located above the first filter tray (5) inside. The fractionating tower (4) is provided with a third filter tray (7) located above the second filter tray (6) inside. The fractionating tower (4) is provided with a servo motor (8) at the top. The output end of the first bevel gear (9) is fixedly connected to the first bevel gear (9), the outer wall of the first bevel gear (9) is fixedly connected to the first rotating shaft (10), the outer wall of the first bevel gear (9) is meshed with the second bevel gear (11), the outer wall of the second bevel gear (11) is meshed with the third bevel gear (12), the outer wall of the third bevel gear (12) is fixedly connected to the second rotating shaft (13) sleeved on the outer wall of the first rotating shaft (10), and the outer wall of the second rotating shaft (13) is fixedly connected to the fixed disk (14) rotatably connected to the inner wall of the fractionation tower (4). A striking component (16) is provided below the fixed plate (14), a clearing component (17) is provided below the first filter tower plate (5), and a recovery component (18) is provided at the top of the fractionation tower (4). The unblocking assembly (17) includes a second gear (1602), a striking rod (1606), and a striking block (1607). The second gear (1602) is rotatably connected to the outer wall of the fixed disk (14). A fixed column (1603) is fixedly connected to the outer wall of the second gear (1602). A reciprocating rod (1604) is slidably connected to the outer wall of the fixed column (1603) and is slidably connected to the outer wall of the fixed disk (14). A striking rod (1606) is fixedly connected to one end of the reciprocating rod (1604). A striking block (1607) is fixedly connected to the outer wall of the striking rod (1606). A connecting scraper (1608) that fits against the bottom of the fractionation tower (4) is fixedly connected to the outer wall of the first rotating shaft (10).

2. The fractionation device for pure biodiesel according to claim 1, characterized in that: The inner wall of the second rotating shaft (13) is provided with a connection port at the connection part with the first rotating shaft (10), and the inner wall contour of the connection port is larger than the outer wall contour of the first rotating shaft (10).

3. The fractionation device for pure biodiesel according to claim 1, characterized in that: The inner wall of the fractionation tower (4) is fixedly connected with a limiting rod (15) that fits against the surface of the fixed plate (14).

4. A fractionation device for pure biodiesel according to claim 1, characterized in that: The outer wall of the first rotating shaft (10) is fixedly connected to a first gear (1601) that meshes with the outer wall of the second gear (1602), and a limit groove (1605) is provided at the connection between the outer wall of the reciprocating rod (1604) and the fixed column (1603).

5. A fractionation apparatus for pure biodiesel according to claim 1, characterized in that: The striking blocks (1607) are arranged in a straight line on the surface of the striking rod (1606), and the outer wall of the striking blocks (1607) is conical in the contact area with the inner wall of the fractionation tower (4).

6. A fractionation apparatus for pure biodiesel according to claim 1, characterized in that: The unblocking assembly (17) includes a telescopic rod (1706) and a striking plate (1707). The inner wall of the fractionation tower (4) is fixedly connected to a connecting plate (1701) sleeved on the outer wall of the second rotating shaft (13). The outer wall of the second rotating shaft (13) is fixedly connected to a bevel gear set (1702). The outer wall of the bevel gear set (1702) is fixedly connected to a turntable (1703). The outer wall of the turntable (1703) is rotatably connected to a pulling rod (1704). One end of the pulling rod (1704) is rotatably connected to a connecting rod (1705). The bottom of the connecting rod (1705) is fixedly connected to a telescopic rod (1706) fixedly connected to the outer wall of the connecting plate (1701). The outer wall of the connecting rod (1705) is fixedly connected to a striking block (1607) located below the first filter tower plate (5).

7. A fractionation apparatus for pure biodiesel according to claim 6, characterized in that: The outer wall of the striking block (1607) is arranged in a ring shape, and the unblocking component (17) is respectively arranged below the first filter tower plate (5), the second filter tower plate (6) and the third filter tower plate (7).

8. A fractionation apparatus for pure biodiesel according to claim 1, characterized in that: The recovery assembly (18) includes a recovery nozzle (1802) and a reflux pipe (1811). An annular pipe (1801) is fixedly connected to the inner wall of the fractionation tower (4). A recovery nozzle (1802) is fixedly connected to the outer wall of the annular pipe (1801). A recovery pipe (1803) extending to the outside of the fractionation tower (4) is fixedly connected to the outer wall of the annular pipe (1801). A connecting cylinder (1804) is fixedly connected to one end of the recovery pipe (1803). A filter screen (1805) is provided inside the connecting cylinder (1804). The second bevel gear (1801) 1) The outer wall is fixedly connected to a suction fan (1806) that is rotatably connected to the inner wall of the connecting cylinder (1804). The outer wall of the connecting cylinder (1804) is fixedly connected to a connecting pipe (1807). One end of the connecting pipe (1807) is fixedly connected to a dust collection box (1808). The outer wall of the dust collection box (1808) is fixedly connected to a connecting pipe (1809). One end of the connecting pipe (1809) is fixedly connected to a drying cylinder (1810). The outer wall of the drying cylinder (1810) is fixedly connected to a return pipe (1811) that is fixedly connected to the outer wall of the heating box (1).

9. A fractionation apparatus for pure biodiesel according to claim 8, characterized in that: The dust removal box (1808) is equipped with a negative electrode roller and a positive electrode plate. The drying cylinder (1810) is equipped with a drying ball agent. The heating box (1) is equipped with a heat storage chamber. The reflux pipe (1811) is connected to the heat storage chamber inside the heating box (1). The outer wall of the fractionation tower (4) is equipped with a cleaning port (19).

10. A fractionation method for pure biodiesel according to any one of claims 1-9, characterized in that, Includes the following steps: Step S1: The pure biodiesel feedstock to be processed is transported to the heating box (1) through the feeding pipe (2) for preheating treatment, and after the feedstock is heated, it is transported to the fractionation tower (4) through the conveying pipe (3) for multiple fractionation processing. Step S2: After the pure biodiesel feedstock is fractionated in the fractionation tower (4), to prevent coking impurities from accumulating at the bottom of the fractionation tower (4) and affecting the subsequent fractionation quality of the pure biodiesel, the first rotating shaft (10) drives the first gear (1601) to rotate, which in turn drives the second gear (1602) to rotate. The second gear (1602) rotates and, through the reciprocating motion of the striking rod (1606) and the striking block (1607), knocks and loosens the inner wall at the bottom of the fractionation tower (4), and scrapes and cleans the coking impurities while the connecting scraper (1608) rotates synchronously. Step S3: When the pure biodiesel is subjected to multiple fractionation treatment through the filter tower tray, the turntable (1703) drives the striking plate (1707) to reciprocate and lift, so that the striking plate (1707) repeatedly hits and contacts the surface of the filter tower tray, so that the impurities adsorbed by the mesh on the surface of the filter tower tray are simultaneously hit, cleared and cleaned, and the smoothness of the fractionation flow of pure biodiesel is improved. Step S4: When processing pure biodiesel in the fractionation tower (4), the heat generated during fractionation in the fractionation tower (4) is transported to the connecting cylinder (1804) through the recovery nozzle (1802) and the reflux pipe (1811) by the setting of the recovery nozzle (1802). The recovered heat is then transported to the reflux pipe (1811) through the dust removal box (1808) and the drying cylinder (1810) by the setting of the suction fan (1806), and then to the heating box (1), so as to heat the inside of the heating box (1) and convert and recover the heat generated during fractionation.

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