Novel lecithin dryer

Abstract

The utility model relates to the technical field of lecithin drying, and discloses a novel lecithin dryer which comprises a tank body and a stirring shaft arranged in the tank body, the part, extending into the tank body, of the stirring shaft is connected with a plurality of stirring blades, and the part, upwards extending out of the tank body, of the stirring shaft is in sealed connection with the stirring shaft through an organic sealing structure. The mechanical seal structure comprises a movable ring piece and a static ring piece which are arranged outside the stirring shaft, the movable ring piece is fixedly connected with the stirring shaft, the static ring piece is fixedly connected with the tank body, and the upper end face of the static ring piece abuts against the lower end of the movable ring piece; a lubricating channel is formed in one side of the movable ring piece and one side of the static ring piece, and a water absorption piece used for stretching into the lubricating channel and making contact with the contact face of the movable ring piece and the static ring piece is arranged on one side of the lubricating channel. One side of the mechanical seal structure is provided with a lubricating opening allowing the water absorption piece to stretch into the lubricating channel, the lubricating opening is provided with a first nozzle used for spraying cooling liquid to the movable ring piece and the static ring piece, and the first nozzle is located above the water absorption piece. Foreign matters can be prevented from falling into the tank body.

Description

Technical Field

[0001] The utility model relates to the technical field of lecithin drying, in particular to a novel lecithin dryer. Background Art

[0002] In the production process of lecithin, drying is a very important process step. Lecithin is dried using a vacuum method to effectively remove the organic solvent acetone and moisture contained in the product. Currently, common lecithin dryers basically adopt a vacuum structure, and in order to make the drying more thorough, a stirring device is generally provided. The stirring device generally includes a stirring shaft disposed in a tank body and a stirring blade connected to the stirring shaft. The stirring shaft is driven to rotate by a bearing connected to the motor. During the rotation of the stirring shaft, lubrication is required to make the rotation smoother. Prolonged rotation will generate heat at the driving rotation connection, accelerate the wear between the dynamic mold and the static mold at the contact part, and easily produce residue. In order to better lubricate the various components that drive the rotating shaft, the relevant structure is directly sealed with a mechanical seal, and then cooled by filling the sealed space with coolant.

[0003] However, as lecithin dryers age, the contact area between the existing mechanical seal and the agitator shaft wears out, creating gaps in the tank that allow metal debris, lubricating oil, or coolant to fall into the tank. This not only contaminates the dried lecithin product but also poses a significant risk of explosion if it encounters flammable and explosive organic solvents such as acetone. Utility Model Content

[0004] The utility model aims to provide a novel lecithin dryer to solve the problem that metal residues, coolant or lubricating oil easily fall into the tank body as the lecithin dryer is used for a long time, causing product contamination or even explosion danger.

[0005] To solve the above problems, the following solutions are proposed:

[0006] Option 1: A new lecithin dryer, comprising a tank body, a stirring shaft arranged in the tank body, the part of the stirring shaft extending into the tank body being connected to a plurality of stirring blades, the part of the stirring shaft extending upward from the tank body being sealed and connected to the stirring shaft by an organic seal structure; the organic seal structure comprises a dynamic ring and a static ring arranged outside the stirring shaft, the dynamic ring is fixedly connected to the stirring shaft, the static ring is fixedly connected to the tank body, and the upper end face of the static ring abuts against the lower end of the dynamic ring; a lubrication channel is provided on one side of the dynamic ring and the static ring, a water absorbing member is provided on one side of the lubrication channel for extending into the lubrication channel and contacting the contact surface of the dynamic ring and the static ring; a lubrication port is provided on one side of the mechanical seal structure for the water absorbing member to extend into the lubrication channel, and a first nozzle is provided on the lubrication port for spraying coolant onto the dynamic ring and the static ring, the first nozzle being located above the water absorbing member; all water absorbing members have a liquid adsorption function.

[0007] The advantages of this solution are:

[0008] The utility model provides a new lecithin dryer by improving the mechanical seal structure above the tank body. Compared with the existing lecithin dryer, which needs to immerse the entire mechanical seal structure in cold water for cooling, the utility model reduces the number of dynamic rings, static rings and end face mechanical seals by improving the internal structure of the mechanical seal structure. The original mechanical seal structure required a group of dynamic rings and static rings at both ends, as well as two upper and lower end face mechanical seals, but now only requires a group of dynamic rings and static rings at the lower end of the mechanical seal structure and a corresponding single end face mechanical seal. The utility model does not need to immerse the entire mechanical seal structure in cold water, but only needs to locally cool and lubricate the contact surfaces of the dynamic ring and the static ring by using the water absorption member and the first nozzle. Under the premise of greatly reducing the presence of liquid in the mechanical seal structure, liquid leakage that may be caused by wear is reduced.

[0009] In addition, the first nozzle is located above the water-absorbing member, and the coolant sprayed from the first nozzle directly acts on the contact surface of the moving ring and the stationary ring, providing both cooling and lubrication. The water-absorbing member, which has a liquid adsorption function, is located below the first nozzle and can effectively absorb excess coolant sprayed from the first nozzle. When the first nozzle is not spraying, the water-absorbing member contacts the contact surface of the moving ring and the stationary ring, providing contact lubrication and cooling. As the moving ring rotates relative to each other, the coolant on the water-absorbing member is applied to the entire contact surface of the moving ring and the stationary ring. At the same time, the soaked water-absorbing member also has a certain metal residue adsorption function, and can be used to collect metal residue by regularly replacing the water-absorbing member.

[0010] In addition, the coolant acting as a lubricant can be absorbed by the water-absorbing member and gathered at the end, so that the lubricant can be applied between the contact surfaces of the dynamic ring and the static ring through the water-absorbing member. With this arrangement, the end faces of the dynamic ring and the static ring can obtain sufficient lubricant for lubrication of the end faces, so the probability of wear between the end faces of the dynamic ring and the static ring can be reduced, the life of the equipment can be improved, and the generation of metal residues due to long-term friction can be reduced.

[0011] The utility model can effectively reduce the amount of liquid in the mechanical seal structure above the tank filling port without affecting lubrication and cooling, thereby preventing liquid from leaking into the tank body; it can reduce the generation of metal residues due to wear between the moving and static ring parts. The utility model effectively solves the problem that metal residues, coolant or lubricating oil are likely to fall into the tank body as the lecithin dryer is used for a long time, causing product contamination or even explosion risk.

[0012] Furthermore, the water absorbing member is in the shape of an elongated strip, and a plastic spring is provided in one end of the water absorbing member away from the dynamic ring member.

[0013] The absorbent element is long and narrow, allowing for precise, narrow contact with the contact surfaces of the moving and stationary rings. This reduces both the volume of liquid and the contact area between the absorbent element and the moving and stationary rings, reducing the relative resistance to the moving ring's rotation without affecting its normal rotation. The placement of a plastic spring away from the moving and stationary rings not only helps maintain the absorbent element's long and narrow shape, but also helps restore the absorbent element to its optimal contact position with the moving and stationary rings if it deviates due to external forces. This also helps restore the absorbent element to its position below the first nozzle, optimal for absorbing the sprayed coolant.

[0014] Furthermore, the part of the stirring shaft extending out of the tank body is connected to a cylindrical stabilizer, and the stabilizer is used to reduce the swing of the stirring shaft; the part of the stirring shaft extending out of the tank body is connected to a shaft sleeve, and the stabilizer, dynamic ring and static ring are sequentially sleeved on the outside of the shaft sleeve from top to bottom.

[0015] Furthermore, a single-end mechanical seal is provided between the stabilizer and the dynamic ring.

[0016] Compared with the current double-end mechanical seal, the single-end mechanical seal requires less lubrication and cooling, so the amount of liquid required is smaller, and the liquid is prevented from leaking into the tank by reducing the amount of liquid from the source.

[0017] Furthermore, the plastic spring is L-shaped, and the water-absorbing material wrapped around the plastic spring contacts the contact surfaces of the single-end mechanical seal and the dynamic ring and the static ring respectively.

[0018] It not only cools and lubricates the contact surfaces of the dynamic and static rings, but also cools and lubricates the single-end mechanical seal.

[0019] Furthermore, a top plate is provided at the top of the tank body outside the filling port, and a baffle is provided below the static ring between the sleeve and the top plate to prevent debris from entering the filling port. The baffle is vertically arranged, and a limiting opening is provided at the bottom end of the sleeve for inserting the baffle.

[0020] By setting the limit opening at the bottom end of the sleeve and the baffle, the baffle is connected to the top plate and inserted upward into the limit opening, so that the baffle and the sleeve constrain each other's vertical shape, sealing the gap between the filling port and the sleeve, and avoiding the possibility of entering the tank body from here.

[0021] Furthermore, a foreign matter collecting device is provided on the top plate, and the foreign matter collecting device includes a first channel located at the bottom end of the sleeve for collecting foreign matter blocked by the blocking plate, a second channel located below the first channel and connected to the first channel, a foreign matter discharge port connected to the second channel, and a vacuum pump connected to the foreign matter discharge port.

[0022] When foreign matter including metal residues, coolant, etc. falls from top to bottom and is blocked in the first channel outside by the baffle, the vacuum pump uses the second channel connected to it and, by means of negative pressure adsorption, successively adsorbs the foreign matter from the first channel, the second channel, and the foreign matter discharge port, thereby cleaning the generated foreign matter and further avoiding the possibility of foreign matter falling into the tank body.

[0023] Furthermore, the length of the second channel is more than twice the length of the first channel.

[0024] While being able to collect foreign matter, it also facilitates the connection and adsorption of the vacuum pump.

[0025] Furthermore, the mechanical seal structure is provided with a liquid leakage discharge port on the opposite side of the lubrication port, the liquid leakage discharge port is located above the foreign matter discharge port, and the liquid leakage discharge port is connected to a third channel located below the static ring.

[0026] The third channel allows the liquid that falls from the top to the bottom of the stationary ring to be discharged from the leakage outlet, making it easier to collect foreign matter later. The leakage outlet can also be connected to a vacuum pump to absorb the leaked liquid through the negative pressure of the vacuum pump.

[0027] Furthermore, an overflow port is provided above the lubrication port, and a second nozzle is installed on the overflow port, and the second nozzle sprays coolant toward the single-end mechanical seal.

[0028] Excess coolant can flow out through the overflow port, preventing it from collecting. A second nozzle, installed above the overflow port, does not completely block it, thus not affecting its use. The second nozzle also allows for independent cooling and lubrication of the single-end mechanical seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a product structure diagram of Example 1 of the utility model.

[0030] Figure 2 for Figure 1 Cross-sectional view of the mechanical seal structure. DETAILED DESCRIPTION

[0031] The following is further described in detail through specific implementation methods:

[0032] The figure marks in the drawings of the specification include: tank body 11, stirring shaft 12, stirring blade 13, mechanical seal structure 14, bearing 21, single-end face mechanical seal 22, overflow port 23, lubrication port 24, first nozzle 25, second nozzle 26, water absorption part 27, dynamic ring part 28, static ring part 29, top plate 30, baffle 31, shaft sleeve 32, first channel 33, second channel 34, horizontal discharge port 35, vertical discharge port 36, leakage discharge port 37, and third channel 38.

[0033] Example 1

[0034] like Figure 1 As shown, the new lecithin dryer includes a tank body 11 for drying, with a filling port at the top of the tank body 11, and a stirring shaft 12 with a top connected to a motor extending from top to bottom into the tank body 11. The portion of the stirring shaft 12 extending into the tank body 11 is connected to a plurality of stirring blades 13, and the portion of the stirring shaft 12 extending upward from the tank body 11 is sealed with an organic sealing structure 14.

[0035] The part of the stirring shaft 12 extending out of the tank body 11 is connected to the outside of a cylindrical stabilizer, and the stabilizer is used to reduce the swing of the stirring shaft 12; the part of the stirring shaft 12 extending out of the tank body 11 is connected to the outside of the shaft sleeve 32, and the stabilizer, the dynamic ring 28 and the static ring 29 are sequentially sleeved on the outside of the shaft sleeve 32 from top to bottom.

[0036] The upper end surface of the stabilizer and the dynamic ring 28 forms a single-end mechanical seal 22. Compared with existing double-end mechanical seals, the single-end mechanical seal 22 requires less lubrication and cooling, which reduces the amount of liquid required. This reduces the amount of liquid at the source and prevents liquid from leaking into the tank body 11.

[0037] The top of the tank body 11 is provided with a top plate 30 outside the filling port. Below the stationary ring 29, a baffle 31 is provided between the shaft sleeve 32 and the top plate 30 to prevent debris from entering the filling port. The baffle 31 is vertically arranged, and the bottom of the main shaft sleeve 32 is provided with a stop opening for the baffle 31 to be inserted. Through the arrangement of the stop opening at the bottom of the shaft sleeve 32 and the baffle 31, the baffle 31 is connected to the top plate 30 and inserted upward into the stop opening, so that the baffle 31 and the shaft sleeve 32 constrain each other to a vertical position, sealing the gap between the filling port and the shaft sleeve 32 and preventing the possibility of debris entering the tank body 11 through this gap.

[0038] like Figure 2 As shown, the mechanical seal structure 14 includes a dynamic ring 28 and a static ring 29 arranged outside the stirring shaft 12, the dynamic ring 28 is fixedly connected to the stirring shaft 12, the static ring 29 is fixedly connected to the tank body 11, and the upper end face of the static ring 29 abuts against the lower end of the dynamic ring 28; a lubrication channel is provided on one side of the dynamic ring 28 and the static ring 29, and a water absorbing member 27 is provided on one side of the lubrication channel for extending into the lubrication channel and contacting the contact surface of the dynamic ring 28 and the static ring 29; a lubrication port 24 is provided on one side of the mechanical seal structure 14 for the water absorbing member 27 to extend into the lubrication channel, and a first nozzle 25 is provided on the lubrication port 24 for spraying coolant to the dynamic ring 28 and the static ring 29, and the first nozzle 25 is located above the water absorbing member 27; all water absorbing members 27 have a liquid adsorption function.

[0039] The ends of the absorbent member 27 are provided with lubricating elements. These lubricating elements are made of flexible, water-absorbing material that can directly contact the end surfaces of the rotating ring 28 and the stationary ring 29. The absorbent member 27 is elongated, with a plastic spring embedded in the end away from the rotating ring 28. The elongated shape of the absorbent member 27 facilitates precise, narrow contact with the contact surfaces of the rotating and stationary rings 28 and 29. This reduces both the amount of liquid and the contact area between the absorbent member 27 and the rotating and stationary rings 29, thus minimizing the relative resistance to the rotation of the rotating ring 28 and preventing it from interfering with its normal rotation. The placement of the plastic spring away from the rotating and stationary rings not only helps maintain the elongated shape of the absorbent member 27 but also facilitates its return to its optimal contact position with the rotating and stationary rings 28 and 29 after being deflected by external forces. This also helps the absorbent member 27 return to its position below the first nozzle 25, optimal for absorbing the sprayed coolant.

[0040] The absorbent member 27, located near the end of the rotating ring 28 and the stationary ring 29, is provided with a strip of absorbent material, which can be a sponge or cotton cloth. Both sponge and cotton cloth have excellent water absorption properties, particularly when made from pure wood pulp cotton. Furthermore, the plastic spring supports the absorbent material, ensuring that the strip remains in contact with the surfaces of the rotating ring 28 and the stationary ring 29 when needed.

[0041] The plastic spring is L-shaped, and the water-absorbing material wrapped around it contacts the single-end mechanical seal 22 and the contact surfaces of the dynamic ring 28 and the static ring 29. This cools and lubricates not only the contact surfaces of the dynamic ring 28 and the static ring 29, but also the single-end mechanical seal 22.

[0042] The top plate 30 is provided with a foreign matter collection device. The foreign matter collection device includes a first channel 33 located at the bottom end of the sleeve 32 for collecting foreign matter blocked by the baffle 31, a second channel 34 located below and connected to the first channel 33, a foreign matter discharge port connected to the second channel 34, and a vacuum pump connected to the foreign matter discharge port. When foreign matter, such as metal residue and coolant, falls from the top and is blocked outside the first channel 33 by the baffle 31, the vacuum pump, through the second channel 34 connected thereto, sequentially sucks the foreign matter out of the first channel 33, the second channel 34, and the foreign matter discharge port by negative pressure, thereby cleaning the generated foreign matter and further preventing the foreign matter from falling into the tank body 11.

[0043] The foreign matter discharge port includes a horizontal discharge port 35 that is horizontally connected to the second channel 34, and a vertical discharge port 36 that is vertically connected to the second channel 34. When not in use, both ports can be blocked with a plug. When in use, the vacuum pump pipe can be directly extended into the corresponding discharge port to temporarily connect with the second channel 34.

[0044] The length of the second channel is more than twice the length of the first channel 33. While being able to collect foreign matter, it is also convenient for the vacuum pump to communicate and adsorb.

[0045] The mechanical seal structure 14 is provided with a liquid leakage discharge port 37 on the opposite side of the lubrication port 24 . The liquid 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 .

[0046] The liquid that falls from top to bottom to the bottom of the static ring 29 is discharged from the leakage discharge port 37 through the third channel 38, which helps to facilitate the collection of foreign matter later. The leakage discharge port can also be connected to a vacuum pump to absorb the leakage through the negative pressure of the vacuum pump.

[0047] An overflow port 23 is provided above the lubrication port 24. Excessive coolant can be discharged through the overflow port 23 to avoid accumulation.

[0048] In this embodiment, the first nozzle 25 can be an ordinary nozzle. The outsides of the two nozzles are connected to a hose for conveying coolant. The nozzles can be remotely controlled. The nozzles themselves and their use are conventional means and will not be described in detail here. The existing connection structure between the nozzles and the hoses is not shown in the figure.

[0049] In this embodiment, the water-absorbing member can be fixed in a variety of existing ways, such as by adhering the straight section of the water-absorbing member to the inner wall of the lubrication port with tape, connecting the end of the straight section to the threaded hole already opened on the side wall of the lubrication port with screws, or even pulling the end of the straight section out of the lubrication port and directly adhering it with tape or screwing it to the outer wall of the mechanical seal structure.

[0050] In this embodiment, the plastic spring can also be replaced by a plastic strip. The plastic strip is integrally formed, and the water-absorbing material is pasted or wrapped around the outer periphery of the plastic strip. When installing the water-absorbing component, because the entire water-absorbing component has elasticity due to the paint strip, after the straight section passes through the lubrication channel from top to bottom and out of the lubrication port, the entire water-absorbing component is fixed by fixing the straight section.

[0051] This embodiment provides a new lecithin dryer by improving the mechanical seal structure 14 above the tank body 11. Compared with the current lecithin dryer, it is necessary to immerse the entire mechanical seal structure 14 in cold water for cooling. The utility model reduces the number of dynamic rings 28 and static rings 29 by improving the internal structure of the mechanical seal structure 14. The original mechanical seal structure 14 needs to have a set of dynamic rings 28 and static rings 29 at both ends, and the single-end mechanical seal 22 only needs a set of dynamic rings 28 and static rings 29 at the lower end of the mechanical seal structure 14. The utility model does not need to immerse the entire mechanical seal structure 14 in cold water. It only needs to locally cool and lubricate the contact surface of the dynamic ring 28 and the static ring 29 by the water absorption member 27 and the first nozzle 25. Under the premise of greatly reducing the presence of liquid in the mechanical seal structure 14, it reduces liquid leakage that may be caused by wear.

[0052] Furthermore, the first nozzle 25 is positioned above the water-absorbing member 27. The coolant sprayed from the first nozzle 25 directly impacts the contact surface between the rotating ring 28 and the stationary ring 29, providing both cooling and lubrication. The water-absorbing member 27, which has a liquid-absorbing function, is positioned below the first nozzle 25 and effectively absorbs excess coolant sprayed from the first nozzle 25. When the first nozzle 25 is not spraying, the contact between the water-absorbing member 27 and the contact surface between the rotating ring 28 and the stationary ring 29 provides both contact lubrication and cooling. As the rotating ring 28 rotates relative to the other, the coolant on the water-absorbing member 27 is applied to the entire contact surface between the rotating ring 28 and the stationary ring 29. Furthermore, the soaked water-absorbing member 27 also has a certain metal residue adsorption function, which can be collected by periodically replacing the water-absorbing member 27.

[0053] In addition, the coolant acting as a lubricant can be absorbed by the water-absorbing member 27 and gathered at the end, so that the lubricant can be applied between the contact surfaces of the dynamic ring 28 and the static ring 29 through the water-absorbing member 27. With this arrangement, the end faces of the dynamic ring 28 and the static ring 29 can obtain sufficient lubricating liquid for lubrication of the end faces, so the probability of wear between the end faces of the dynamic ring 28 and the static ring 29 can be reduced, the life of the equipment can be improved, and the generation of metal residues due to long-term friction can be reduced.

[0054] The present invention can effectively reduce the amount of liquid in the mechanical seal structure 14 above the filling port of the tank body 11 without affecting lubrication and cooling, thereby preventing liquid from leaking into the tank body 11; it can reduce the generation of metal residues due to mutual movement and wear of the dynamic ring 28 and the static ring 29. The present invention effectively solves the problem that metal residues, coolant or lubricating oil are likely to fall into the tank body 11 as the lecithin dryer is used for a long time, causing product contamination or even explosion risk.

[0055] Example 2

[0056] In this embodiment, a second nozzle 26 is mounted on the overflow port 23. The second nozzle 26 sprays coolant toward the single-end mechanical seal 22. The second nozzle 26 is mounted above the overflow port 23 and does not completely block the overflow port 23, thereby preventing it from being used. Furthermore, the second nozzle 26 can be used to cool and lubricate the single-end mechanical seal 22.

[0057] Example 3

[0058] In this embodiment, the water-absorbing member has the same shape as the lubrication channel, including a straight section connected to the lubrication port, a first bent section that bends upward, and a second bent section that bends toward the contact surface between the dynamic ring and the static 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 the length of the first bent section, and the length of the straight section is less than one-half of the length of the first bent section. The angle between the first bent section and the straight section, as well as the angle between the first bent section and the second bent section, are both greater than 95 degrees and less than 180 degrees. This arrangement can ensure that the water-absorbing member absorbs the coolant to the maximum extent while facilitating the transfer of the coolant from the straight section to the free end of the second bent section.

[0059] The above description is merely an embodiment of the present invention, and the commonly known specific technical solutions and / or features of the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be considered as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A novel lecithin dryer comprising a tank body and a stirring shaft disposed within the tank body, wherein the portion of the stirring shaft extending into the tank body is connected to a plurality of stirring blades, and the portion of the stirring shaft extending upward from the tank body is sealedly connected to the stirring shaft by an organic seal structure; characterized in that: The mechanical seal structure includes a dynamic ring and a static ring arranged outside the stirring shaft, the dynamic ring is fixedly connected to the stirring shaft, the static ring is fixedly connected to the tank body, and the upper end face of the static ring is in contact with the lower end of the dynamic ring; a lubrication channel is provided on one side of the dynamic ring and the static ring, and a water absorbing part is provided on one side of the lubrication channel for extending into the lubrication channel and contacting the contact surface of the dynamic ring and the static ring; a lubrication port is provided on one side of the mechanical seal structure for the water absorbing part to extend into the lubrication channel, and a first nozzle is provided on the lubrication port for spraying coolant to the dynamic ring and the static ring, and the first nozzle is located above the water absorbing part; all water absorbing parts have a liquid adsorption function.

2. The novel lecithin dryer according to claim 1, characterized in that: The water absorbing member is in the shape of an elongated strip, and a plastic spring is provided in one end of the water absorbing member away from the dynamic ring member.

3. The novel lecithin dryer according to claim 1, characterized in that: The part of the stirring shaft extending out of the tank body is connected to a cylindrical stabilizer, and the stabilizer is used to reduce the swing of the stirring shaft; the part of the stirring shaft extending out of the tank body is connected to a shaft sleeve, and the stabilizer, dynamic ring and static ring are sequentially sleeved on the outside of the shaft sleeve from top to bottom.

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

5. The novel lecithin dryer according to claim 2, characterized in that: The plastic spring is "L"-shaped, and the water-absorbing material wrapped around the plastic spring contacts the contact surfaces of the single-end mechanical seal and the dynamic ring and the static ring respectively.

6. The novel lecithin dryer according to claim 1, characterized in that: The top of the tank body is provided with a top plate outside the filling port, and below the static ring, a baffle is provided between the sleeve and the top plate to prevent debris from entering the filling port. The baffle is vertically arranged, and the bottom end of the sleeve is provided with a limiting opening for inserting the baffle.

7. The novel lecithin dryer according to claim 6, characterized in that: A foreign matter collecting device is provided on the top plate, and the foreign matter collecting device includes a first channel located at the bottom end of the sleeve for collecting foreign matter blocked by the blocking plate, a second channel located below the first channel and connected to the first channel, a foreign matter discharge port connected to the second channel, and a vacuum pump connected to the foreign matter discharge port.

8. The novel lecithin dryer according to claim 7, characterized in that: The length of the second channel is more than twice the length of the first channel.

9. The novel lecithin dryer according to claim 8, characterized in that: The mechanical seal structure is provided with a liquid leakage discharge port on the opposite side of the lubrication port. The liquid leakage discharge port is located above the foreign matter discharge port. The liquid leakage discharge port is connected to a third channel located below the static ring.

10. The novel lecithin dryer according to claim 9, 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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