A new lecithin dryer

Abstract

This invention relates to the field of lecithin drying technology and discloses a novel lecithin dryer, comprising a tank body, a stirring shaft disposed within the tank body, a portion of the stirring shaft extending into the tank body connected to multiple stirring blades, and a mechanical seal structure sealingly connecting the portion of the stirring shaft extending upwards into the tank body. The mechanical seal structure includes a moving ring and a stationary ring disposed outside the stirring shaft. The moving ring is fixedly connected to the stirring shaft, and the stationary ring is fixedly connected to the tank body, with the upper end face of the stationary ring abutting against the lower end of the moving ring. A lubrication channel is provided on one side of the moving and stationary rings, and a water-absorbing element is provided on one side of the lubrication channel for extending into the lubrication channel and contacting the contact surfaces of the moving and stationary rings. A lubrication port is provided on one side of the mechanical seal structure for the water-absorbing element to extend into the lubrication channel, and a first nozzle is provided on the lubrication port for spraying coolant onto the moving and stationary rings, the first nozzle being located above the water-absorbing element. This invention can prevent foreign objects from falling into the tank body.

Description

Technical Field

[0001] This invention relates to the field of lecithin drying technology, and specifically to a novel lecithin dryer. Background Technology

[0002] Lecithin is a nutrient extracted from egg yolks and is also widely found in both plants and animals. Its main components include phosphatidylcholine (PC), cephalin (PE), inositol phospholipids (PI), and phosphatidic acid (PA). This nutrient-rich substance has a variety of important physiological functions, including delaying aging, improving brain function, preventing arteriosclerosis, relieving cardiovascular disease, preventing fatty liver, and moisturizing the skin.

[0003] In the production process of lecithin, drying is a crucial step. Vacuum drying effectively removes organic solvents like acetone and moisture from the product. Most lecithin dryers nowadays utilize a vacuum structure, and a stirring device is typically included to ensure thorough drying. This stirring device generally consists of a stirring shaft inside the tank and stirring blades connected to it. The stirring shaft is driven by bearings connected to a motor. During rotation, lubrication is required for smooth operation. Prolonged rotation generates heat at the drive shaft connection points, accelerating wear between the moving and stationary molds and potentially leading to residue buildup. To further lubricate the components driving the shaft, mechanical seals are used to seal the relevant structures, and the sealed space is then cooled by a coolant.

[0004] However, as the lecithin dryer is used for an extended period, wear increases at the contact points between the existing mechanical seal and the agitator shaft, creating openings that allow metal residues, lubricating oil, or coolant to fall into the tank. Once this metal residue, lubricating oil, or coolant falls into the tank, it not only contaminates the dried lecithin product but also poses a significant explosion hazard if it comes into contact with flammable and explosive organic solvents such as acetone within the tank. Summary of the Invention

[0005] The present invention aims to provide a novel lecithin dryer to solve the problem that metal residues, coolant, or lubricating oil can easily fall into the tank as the lecithin dryer is used for a long time, causing product contamination or even explosion hazards.

[0006] To solve the above problems, the following solution is proposed:

[0007] Option 1: A novel lecithin dryer includes a tank, a stirring shaft disposed within the tank, a portion of the stirring shaft extending into the tank connected to multiple stirring blades, and a mechanical seal structure sealingly connecting the portion of the stirring shaft extending upwards into the tank. The mechanical seal structure includes a moving ring and a stationary ring disposed outside the stirring shaft. The moving ring is fixedly connected to the stirring shaft, and the stationary ring is fixedly connected to the tank, with the upper end face of the stationary ring abutting against the lower end of the moving ring. A lubrication channel is provided on one side of the moving ring and the stationary ring, and a water-absorbing element is provided on one side of the lubrication channel for extending into the lubrication channel and contacting the contact surfaces of the moving and stationary rings. A lubrication port is provided on one side of the mechanical seal structure for the water-absorbing element to extend into the lubrication channel, and a first nozzle is provided on the lubrication port for spraying coolant onto the moving and stationary rings, the first nozzle being located above the water-absorbing element. All water-absorbing elements have liquid adsorption capabilities.

[0008] The advantages of this solution are:

[0009] This invention provides a novel lecithin dryer by improving the mechanical seal structure above the tank. Compared to current lecithin dryers, which require immersing the entire mechanical seal structure in cold water for cooling, this invention reduces the number of moving rings, stationary rings, and end-face seals by improving the internal structure of the mechanical seal. Previously, each end of the mechanical seal structure required a set of moving and stationary rings, as well as two end-face seals. Now, only one set of moving and stationary rings and a corresponding single-end-face seal are needed at the lower end of the mechanical seal structure. Furthermore, this invention eliminates the need to immerse the entire mechanical seal structure in cold water; only the contact surfaces of the moving and stationary rings are locally cooled and lubricated using a water suction component and a first nozzle. This significantly reduces the amount of liquid present within the mechanical seal structure, thereby minimizing potential liquid leakage due to wear.

[0010] Furthermore, the first nozzle is located above the suction component. The coolant sprayed from the first nozzle directly acts on the contact surface of the rotating and stationary ring components, providing both cooling and lubrication. The suction component, with its liquid adsorption function, is located below the first nozzle. It effectively absorbs excess coolant sprayed from the first nozzle and, when the first nozzle is not spraying, provides contact lubrication and cooling through contact with the contact surfaces of the rotating and stationary ring components. As the rotating ring component rotates relative to the other ring, the coolant on the suction component is coated onto all contact surfaces of the rotating and stationary ring components. Simultaneously, the wetted suction component also has a certain metal residue adsorption capacity, allowing for the collection of metal residues by periodically replacing the suction component.

[0011] Furthermore, the coolant, acting as a lubricant, can be absorbed and collected at the end by the water-absorbing component. Therefore, the lubricant can be applied between the contact surfaces of the rotating ring and the stationary ring through the water-absorbing component. As a result, the end faces of the rotating ring and the stationary ring can receive sufficient lubricant for end face lubrication. Therefore, the probability of wear between the end faces of the rotating ring and the stationary ring can be reduced, the service life of the equipment can be extended, and the generation of metal residue due to long-term friction can be reduced.

[0012] This invention can effectively reduce the amount of liquid in the mechanical seal structure above the tank inlet without affecting lubrication and cooling, thus preventing liquid leakage into the tank. It can also reduce the metal residue generated by the mutual wear of the moving and stationary rings. This invention effectively solves the problem that metal residue, coolant, or lubricating oil can easily fall into the tank as the lecithin dryer is used for a long time, causing product contamination or even explosion hazards.

[0013] Furthermore, the absorbent component is elongated, and a plastic spring is provided at the end of the absorbent component away from the moving ring component.

[0014] The elongated shape of the suction element allows for precise, small-area contact with the surfaces of the rotating and stationary rings, reducing the liquid volume and the contact area between the suction element and the rings. This minimizes the relative resistance to the rotation of the rotating ring and prevents interference with its normal operation. The placement of a plastic spring away from the rings helps maintain the elongated shape of the suction element and facilitates its return to the optimal contact position with the rings after being deviated by external forces. It also helps the suction element return to its position below the first nozzle, optimally absorbing the sprayed coolant.

[0015] Furthermore, a cylindrical stabilizer is connected to the part of the stirring shaft that extends out of the tank, and the stabilizer is used to reduce the oscillation of the stirring shaft; a bushing is connected to the part of the stirring shaft that extends out of the tank, and the stabilizer, the moving ring and the stationary ring are sequentially sleeved on the outside of the bushing from top to bottom.

[0016] Furthermore, a single-end mechanical seal is provided between the stabilizer and the moving ring component.

[0017] Compared to current double-end mechanical seals, single-end mechanical seals require less lubrication and cooling, resulting in a smaller volume of liquid used. This reduces the amount of liquid used and prevents liquid from leaking into the tank.

[0018] Furthermore, the plastic spring is L-shaped, and the absorbent material wrapped around the plastic spring contacts the single-end mechanical seal and the contact surfaces of the moving ring and the stationary ring.

[0019] It not only cools and lubricates the contact surfaces of the moving and stationary rings, but also cools and lubricates the single-end mechanical seal.

[0020] Furthermore, the top of the tank is provided with a top plate outside the filling port, and below the stationary ring, between the bushing and the top plate, there is a baffle to prevent debris from entering the filling port. The baffle is vertically arranged, and the bottom end of the bushing is provided with a limiting port for inserting the baffle.

[0021] By setting the limiting port at the bottom of the bushing and the baffle, the baffle is connected to the top plate and inserted upward into the limiting port, so that the baffle and the bushing restrain each other in a vertical position, sealing the gap between the filling port and the bushing, and preventing the possibility of entering the tank from here.

[0022] Furthermore, the top plate is provided with a foreign object collection device, which includes a first channel located at the bottom end of the bushing for collecting foreign objects blocked by the baffle, a second channel located below the first channel and connected to the first channel, a foreign object discharge port connected to the second channel, and a vacuum pump connected to the foreign object discharge port.

[0023] When foreign objects, including metal residue and coolant, fall from the top and are blocked by the baffle in the first channel, the vacuum pump uses the second channel connected to it to adsorb the foreign objects sequentially from the first channel, the second channel, and the foreign object discharge port through negative pressure adsorption, thereby cleaning up the foreign objects and further preventing the possibility of foreign objects falling into the tank.

[0024] Furthermore, the length of the second channel is more than twice the length of the first channel.

[0025] It can collect foreign objects while facilitating connection and adsorption of the vacuum pump.

[0026] Furthermore, the mechanical seal structure has a leakage discharge port on the opposite side of the lubrication port, the leakage discharge port is located above the foreign matter discharge port, and the leakage discharge port is connected to a third channel located below the stationary ring.

[0027] The third channel allows liquid falling from above into the stationary ring to drain from the leak outlet, facilitating easier collection of foreign matter later. The leak outlet can also be connected to a vacuum pump to absorb the leak through negative pressure.

[0028] Furthermore, an overflow port is provided above the lubrication port, and a second nozzle is installed on the overflow port. The second nozzle sprays coolant toward the single-end mechanical seal.

[0029] Excess coolant can be drained through the overflow port to prevent accumulation. The second nozzle is installed above the overflow port, but it does not completely block the overflow port and does not affect its use. Simultaneously, the second nozzle can be used to cool and lubricate the single-end mechanical seal independently. Attached Figure Description

[0030] Figure 1 This is a product structure diagram of Embodiment 1 of the present invention.

[0031] Figure 2 for Figure 1 A cross-sectional view of the mechanical seal structure. Detailed Implementation

[0032] The following detailed description illustrates the specific implementation method:

[0033] The reference numerals in the accompanying drawings include: tank body 11, stirring shaft 12, stirring blade 13, mechanical seal structure 14, bearing 21, single-end mechanical seal 22, overflow port 23, lubrication port 24, first nozzle 25, second nozzle 26, water suction component 27, moving ring component 28, stationary ring component 29, top plate 30, baffle plate 31, bushing 32, first channel 33, second channel 34, horizontal discharge port 35, vertical discharge port 36, leakage discharge port 37, and third channel 38.

[0034] Example 1

[0035] like Figure 1 As shown, the novel lecithin dryer includes a tank 11 for drying. The top of the tank 11 has an inlet. A stirring shaft 12, connected to a motor at its top, extends into the tank 11 from top to bottom. The part of the stirring shaft 12 extending into the tank 11 is connected to multiple stirring blades 13. The part of the stirring shaft 12 extending upward out of the tank 11 is sealed with an organic sealing structure 14.

[0036] A cylindrical stabilizer is connected to the part of the stirring shaft 12 that extends out of the tank 11. The stabilizer is used to reduce the sway of the stirring shaft 12. A bushing 32 is connected to the part of the stirring shaft 12 that extends out of the tank 11. The stabilizer, the moving ring 28 and the stationary ring 29 are sequentially sleeved on the bushing 32 from top to bottom.

[0037] The upper end face of the stabilizer and the moving ring 28 forms a single-end mechanical seal 22. Compared with the current double-end mechanical seal, the single-end mechanical seal 22 requires less lubrication and cooling, and requires less liquid, thus preventing liquid from leaking into the tank 11 from the source by reducing the amount of liquid.

[0038] The top of the tank 11 has a top plate 30 outside the filling port. Below the stationary ring 29, between the bushing 32 and the top plate 30, there is a baffle 31 to prevent debris from entering the filling port. The baffle 31 is vertically arranged, and the bottom end of the main bushing 32 has a limiting port for inserting the baffle 31. Through the limiting port at the bottom end of the bushing 32 and the setting of the baffle 31, after the baffle 31 is connected to the top plate 30, it is inserted upward into the limiting port, so that the baffle 31 and the bushing 32 constrain each other to a vertical position, sealing the gap between the filling port and the bushing 32, and preventing the possibility of debris entering the tank 11 from this point.

[0039] like Figure 2 As shown, the mechanical seal structure 14 includes a moving ring 28 and a stationary ring 29 disposed outside the stirring shaft 12. The moving ring 28 is fixedly connected to the stirring shaft 12, and the stationary ring 29 is fixedly connected to the tank body 11. The upper end face of the stationary ring 29 abuts against the lower end of the moving ring 28. A lubrication channel is provided on one side of the moving ring 28 and the stationary ring 29. A water-absorbing element 27 is provided on one side of the lubrication channel to extend into the lubrication channel and contact the contact surfaces of the moving ring 28 and the stationary ring 29. A lubrication port 24 is provided on one side of the mechanical seal structure 14 for the water-absorbing element 27 to extend into the lubrication channel. A first nozzle 25 is provided on the lubrication port 24 to spray coolant onto the moving ring 28 and the stationary ring 29. The first nozzle 25 is located above the water-absorbing element 27. All water-absorbing elements 27 have liquid adsorption function.

[0040] The end of the absorbent component 27 is provided with a lubricant, which is a flexible absorbent material that can directly contact the end faces of the rotating ring 28 and the stationary ring 29. The absorbent component 27 is elongated, and a plastic spring is provided at the end of the absorbent component 27 away from the rotating ring 28. The elongated shape of the absorbent component 27 facilitates precise and small-range contact with the contact surfaces of the rotating ring 28 and the stationary ring 29, reducing the liquid volume and the contact area between the absorbent component 27 and the rotating and stationary rings 28 and 29, thus reducing the relative resistance to the rotation of the rotating ring 28 and not affecting its normal rotation. By placing the plastic spring away from the rotating and stationary rings, it not only helps maintain the elongated shape of the absorbent component 27, but also helps it return to the optimal contact position with the rotating and stationary rings 28 and 29 after being deviated due to external force. It also helps the absorbent component 27 return to the position below the first nozzle 25, which is most conducive to absorbing the sprayed coolant.

[0041] The end of the absorbent element 27 near the moving ring 28 and the stationary ring 29 is made of a strip of absorbent material, which can be a sponge strip or a cotton strip. Both sponge strips and cotton strips have good absorbency, especially when pure wood pulp cotton fabric is used to make the cotton strip, the absorbency is even better. Furthermore, because of the support of the plastic spring, the strip of absorbent material can maintain contact with the contact surfaces of the moving ring 28 and the stationary ring 29 when needed.

[0042] The plastic spring is L-shaped, and the absorbent material wrapped around the plastic spring contacts the contact surfaces of the single-end mechanical seal 22, the rotating ring 28, and the stationary ring 29. This not only cools and lubricates the contact surfaces of the rotating ring 28 and the stationary ring 29, but also cools and lubricates the single-end mechanical seal 22.

[0043] The top plate 30 is equipped with a foreign object collection device, which includes a first channel 33 located at the bottom of the bushing 32 for collecting foreign objects blocked by the baffle 31, a second channel 34 located below and connected to the first channel 33, a foreign object discharge port connected to the second channel 34, and a vacuum pump connected to the foreign object discharge port. When foreign objects, including metal residue and coolant, fall from above and are blocked by the baffle 31 in the first channel 33, the vacuum pump, through the connected second channel 34, uses negative pressure adsorption to sequentially adsorb the foreign objects from the first channel 33, the second channel 34, and the foreign object discharge port, thereby cleaning up the generated foreign objects and further preventing the possibility of foreign objects falling into the tank 11.

[0044] The foreign object discharge outlet includes a horizontal discharge outlet 35 that is horizontally connected to the second channel 34, and a vertical discharge outlet 36 that is vertically connected to the second channel 34. When not in use, both outlets can be sealed with plugs. When in use, the vacuum pump pipe can be temporarily connected to the corresponding discharge outlet by directly extending it into the second channel 34.

[0045] The second channel is more than twice the length of the first channel 33. This allows for the collection of foreign objects while facilitating connection and adsorption by the vacuum pump.

[0046] The mechanical seal structure 14 is provided with a leakage discharge port 37 on the opposite side of the lubrication port 24. The leakage discharge port 37 is located above the foreign matter discharge port and is connected to a third channel 38 located below the stationary ring 29.

[0047] Liquid falling from above into the stationary ring 29 via the third channel 38 is discharged through the leak outlet 37, facilitating subsequent foreign matter collection. The leak outlet can also be connected to a vacuum pump to absorb the leak through negative pressure.

[0048] An overflow port 23 is provided above the lubrication port 24. Excess coolant can be drained through the overflow port 23 to prevent accumulation.

[0049] In this embodiment, the first nozzle 25 can be a regular nozzle. Both nozzles are connected to hoses for delivering coolant. Both nozzles can be remotely controlled. The nozzles themselves and their use are conventional and will not be described in detail here. The existing connection structure between the nozzles and hoses is not shown in the figure.

[0050] In this embodiment, the water-absorbing component can be fixed in various existing ways. For example, the straight section of the water-absorbing component can be attached to the inner wall of the lubrication port with tape, the end of the straight section can be connected to the threaded hole already opened on the side wall of the lubrication port with screws, or even the end of the straight section can be pulled out of the lubrication port and then directly attached with tape or screws to the outer wall of the mechanical seal structure.

[0051] In this embodiment, the plastic spring can also be replaced by a plastic strip. The plastic strip is integrally molded, and the water-absorbing material is pasted or wrapped around the outside of the plastic strip. When installing the water-absorbing component, because the entire water-absorbing component is elastic due to the coating strip, the straight section is passed through the lubrication channel from top to bottom and then through the lubrication port. The entire water-absorbing component is then fixed by fixing the straight section.

[0052] This embodiment provides a new lecithin dryer by improving the mechanical seal structure 14 above the tank 11. Compared with the current lecithin dryer, which requires immersing the entire mechanical seal structure 14 in cold water for cooling, this invention improves the internal structure of the mechanical seal structure 14, reducing the number of moving rings 28 and stationary rings 29. The original mechanical seal structure 14 required a set of moving rings 28 and stationary rings 29 at both ends, but now only a single-end mechanical seal 22 with a set of moving rings 28 and stationary rings 29 at the lower end is needed. This invention does not require immersing the entire mechanical seal structure 14 in cold water. It only requires local cooling and lubrication of the contact surfaces of the moving rings 28 and stationary rings 29 through the water suction element 27 and the first nozzle 25. This greatly reduces the liquid presence inside the mechanical seal structure 14 and reduces potential liquid leakage due to wear.

[0053] Furthermore, the first nozzle 25 is located above the suction member 27. The coolant sprayed from the first nozzle 25 directly acts on the contact surface of the moving ring member 28 and the stationary ring member 29, providing both cooling and lubrication. The suction member 27, which has liquid adsorption properties, is located below the first nozzle 25, effectively absorbing excess coolant sprayed from the first nozzle 25. When the first nozzle 25 is not spraying, the suction member 27 contacts the contact surfaces of the moving ring member 28 and the stationary ring member 29, providing contact lubrication and cooling. As the moving ring member 28 rotates relative to the other ring, the coolant on the suction member 27 is coated onto all contact surfaces of the moving ring member 28 and the stationary ring member 29. Simultaneously, the wetted suction member 27 also has a certain metal residue adsorption capacity, allowing for the collection of metal residues by periodically replacing the suction member 27.

[0054] Furthermore, the coolant, which can be used as a lubricant, can be absorbed and collected at the end by the water-absorbing component 27. Therefore, the lubricant can be applied between the contact surfaces of the rotating ring 28 and the stationary ring 29 through the water-absorbing component 27. As such, the end faces of the rotating ring 28 and the stationary ring 29 can receive sufficient lubricant for end face lubrication. Therefore, the probability of wear between the end faces of the rotating ring 28 and the stationary ring 29 can be reduced, the service life of the equipment can be improved, and the generation of metal residue due to long-term friction can be reduced.

[0055] This invention can effectively reduce the amount of liquid in the mechanical seal structure 14 above the filling port of the tank 11 without affecting lubrication and cooling, thus preventing liquid leakage into the tank 11. It can also reduce the metal residue generated by the wear of the moving ring 28 and the stationary ring 29 due to their mutual movement. This invention effectively solves the problem that metal residue, coolant, or lubricating oil can easily fall into the tank 11 as the lecithin dryer is used for a long time, causing product contamination or even the risk of explosion.

[0056] Example 2

[0057] In this embodiment, a second nozzle 26 is installed on the overflow port 23, and the second nozzle 26 sprays coolant toward the single-end mechanical seal 22. The second nozzle 26 is installed at the upper part of the overflow port 23, and does not completely block the overflow port 23, so it does not affect the use of the overflow port 23. At the same time, the single-end mechanical seal 22 can be cooled and lubricated independently through the second nozzle 26.

[0058] Example 3

[0059] In this embodiment, the absorber has the same orientation and shape as the lubrication channel, including a straight section connected to the lubrication port, a first bent section that bends upwards, and a second bent section that bends towards the contact surface of the moving ring and the stationary ring. The length of the first bent section is greater than that of the straight section and the second bent section, the length of the second bent section is less than one-third of that of the first bent section, and the length of the straight section is less than half of that of the first bent section. Furthermore, the angles between the first bent section and the straight section, and between the first bent section and the second bent section, are both greater than 95 degrees and less than 180 degrees. This configuration ensures that the absorber can absorb coolant to the maximum extent while facilitating the transfer of coolant from the straight section to the free end of the second bent section.

[0060] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A novel lecithin dryer, comprising a tank, a stirring shaft disposed within the tank, wherein a plurality of stirring blades are connected to the portion of the stirring shaft extending into the tank, and an organic seal structure is used to seal the portion of the stirring shaft extending upward beyond the tank; characterized in that: The mechanical seal structure includes a rotating ring and a stationary ring disposed outside the stirring shaft. The rotating ring is fixedly connected to the stirring shaft, and the stationary ring is fixedly connected to the tank body, with the upper end face of the stationary ring abutting against the lower end of the rotating ring. A lubrication channel is provided on one side of the rotating ring and the stationary ring, and a water-absorbing element is provided on one side of the lubrication channel for extending into the lubrication channel and contacting the contact surfaces of the rotating ring and the stationary ring. A lubrication port is provided on one side of the mechanical seal structure for the water-absorbing element to extend into the lubrication channel, and a first nozzle is provided on the lubrication port for spraying coolant onto the rotating ring and the stationary ring. The first nozzle is located above the water-absorbing element. All water-absorbing elements have liquid adsorption capabilities. The absorbent component is long and narrow, and a plastic spring is provided at the end of the absorbent component away from the moving ring component; The top of the tank is provided with a top plate outside the filling port. Below the stationary ring, between the bushing and the top plate, there is a baffle to prevent debris from entering the filling port. The baffle is set vertically, and the bottom end of the bushing is provided with a limiting port for inserting the baffle.

2. The novel lecithin dryer according to claim 1, characterized in that: A cylindrical stabilizer is connected to the part of the stirring shaft that extends out of the tank. The stabilizer is used to reduce the oscillation of the stirring shaft. A bushing is connected to the part of the stirring shaft that extends out of the tank. The stabilizer, the moving ring, and the stationary ring are sequentially sleeved on the outside of the bushing from top to bottom.

3. The novel lecithin dryer according to claim 2, characterized in that: A single-end mechanical seal is provided between the stabilizer and the moving ring component.

4. The novel lecithin dryer according to claim 1, characterized in that: The plastic spring is L-shaped, and the absorbent material wrapped around the plastic spring contacts the single-end mechanical seal and the contact surfaces of the moving ring and the stationary ring.

5. The novel lecithin dryer according to claim 1, characterized in that: The top plate is provided with a foreign object collection device, which includes a first channel located at the bottom end of the bushing for collecting foreign objects blocked by the baffle, a second channel located below the first channel and connected to the first channel, a foreign object discharge port connected to the second channel, and a vacuum pump connected to the foreign object discharge port.

6. The novel lecithin dryer according to claim 5, characterized in that: The length of the second channel is more than twice the length of the first channel.

7. The novel lecithin dryer according to claim 6, characterized in that: The mechanical seal structure has a leakage discharge port on the opposite side of the lubrication port. The leakage discharge port is located above the foreign matter discharge port and is connected to a third channel located below the stationary ring.

8. The novel lecithin dryer according to claim 7, characterized in that: An overflow port is provided above the lubrication port, and a second nozzle is installed on the overflow port. The second nozzle sprays coolant toward the single-end mechanical seal.

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