Sealing structure of disc separator
By setting up inclined blades and maze-type gap sealing structures in the disc separator, the micro leakage problem between light phases and heavy phases during oil-water separation is solved, the separation effect and accuracy are improved, and the high-precision separation in the special industry is met Require.
Patent Information
- Application Number
- CN201911235290.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-12-05
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2039-12-05
AI Technical Summary
During the oil-water separation process, there is a trace leakage between the light phase and the heavy phase, and between the light phase and the material to be separated, resulting in poor separation effect and high moisture content, which cannot meet the high-precision separation in special industries. Require.
A sealing structure of a disc separator is designed, by setting an inclined second blade on the upper part of the feed cavity to form a local downward air pressure, combined with a maze-type gap seal, to prevent material aerosol from entering the light phase channel and flowing in the light phase. A maze-type gap is set between the channel and the heavy-phase flow channel, and between the light-phase flow channel and the feed cavity to ensure the sealing effect.
It effectively avoids cross-contamination between light phase and heavy phase, and between light phase and materials to be separated, significantly reduces the moisture content of light phase after separation, improves the accuracy of oil-water separation, and meets the low moisture content and High precision separation requirements.
Smart Images
Figure CN112916215B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of separator equipment, in particular to a sealing structure of a disc separator with high-precision separation effect. Background Art
[0002] The disc separator is a type of sedimentation centrifuge. Its drum is installed on the upper end of the vertical shaft and is driven by an electric motor through a transmission device to rotate at high speed. The centrifugal separation technology is used to separate materials that are difficult to separate by gravity sedimentation. Two immiscible liquids with similar densities generate different centrifugal forces in the centrifugal field generated by the high-speed rotation of the drum, thereby separating the two materials. In the process of separating materials, a disc separator is usually used to separate the heavy phase (such as water), light phase (such as oil) and solid phase in the material. At present, the disc separator used to separate mineral oil usually has a net oil water content of more than 3000ppm after oil separation. For some special industries that require high oil separation effect and low water content, the separation requirements of this conventional disc separator cannot meet the requirements of such special industries.
[0003] In the discharge system of the existing disc separator used for oil-water separation of mineral oil, there are gaps between the light phase discharge channel and the heavy phase discharge channel, and between the light phase discharge channel and the feed chamber. During the separation process, trace leakage will occur between the heavy phase discharge channel and the light phase discharge channel, and between the feed chamber and the light phase discharge channel. The heavy phase in the leaked material is mixed with the light phase, which increases the heavy phase component in the light phase, affects the separation effect, and the water content in the light phase after separation is relatively high. Summary of the invention
[0004] In view of the shortcomings of the above-mentioned existing disc separator's discharging system, such as trace leakage between the heavy phase discharging channel and the light phase discharging channel, and between the feed chamber and the light phase discharging channel, which affects the separation effect, the applicant provides a sealing structure of a disc separator with a reasonable structure, which avoids cross contamination between the light phase and the heavy phase, and between the light phase and the material to be separated, thereby ensuring the oil-water separation effect.
[0005] The technical solution adopted by the present invention is as follows:
[0006] A sealing structure of a disc separator, wherein a disc rack is arranged inside the outer shell of a rotary drum, the interior of the rotary drum is connected with a feed port through a feed channel, connected with a heavy phase outlet through a heavy phase flow channel, and connected with a light phase outlet through a light phase flow channel; a plurality of second blades are arranged at the upper part of the feed cavity, and the second blades are arranged obliquely, so that local downward air pressure can be generated when the rotary drum rotates.
[0007] As a further improvement of the above technical solution:
[0008] The second blade is a spiral blade or an inclined plate blade.
[0009] The second blade is arranged on the moving part or the stationary part.
[0010] The second blades are multiple and are evenly arranged at equal angles.
[0011] The present invention arranges a second blade at the upper part of the feed chamber. The second blade can be a spiral blade or an inclined plate blade, which is evenly distributed in the channel and is set at a certain inclination angle. For the volatilized upward-moving mist generated by the material with extremely high feed flow rate, the second blade can form a local downward air pressure at the upper part of the feed chamber to press the material mist in the feed chamber downward back into the feed channel, thereby preventing most of the material mist from entering the light phase channel, and further using a second labyrinth gap seal to isolate a small amount of material mist passing through.
[0012] A first labyrinth gap is arranged between the light phase flow channel and the heavy phase flow channel.
[0013] A disc cover is arranged above the disc rack, and a first set is embedded in the upper port of the disc cover. A plurality of circles of fourth convex rings are protruded upward from the upper surface of the first set, and a fourth ring groove is formed between two adjacent circles of the fourth convex rings; a plurality of circles of fifth convex rings are protruded downward from the lower surface of the heavy-phase centripetal pump, and a fifth ring groove is formed between two adjacent circles of the fifth convex rings; the first labyrinth gap is a tortuous path formed by the fourth convex ring and the fourth ring groove of the first set and the fifth convex ring and the fifth ring groove of the heavy-phase centripetal pump interlaced with each other.
[0014] A first labyrinth gap is set between the light phase flow channel and the heavy phase flow channel, and the first labyrinth gap realizes a labyrinth seal between the light phase flow channel and the heavy phase flow channel, thereby preventing the material in the heavy phase flow channel from leaking into the light phase flow channel and increasing the water content of the light phase, thereby affecting the light phase separation effect. The present invention adopts a labyrinth seal in adjacent flow channels, thereby avoiding cross contamination between the light phase and the heavy phase, and between the light phase and the material to be separated, thereby ensuring the effect of oil-water separation.
[0015] A second labyrinth gap is arranged between the light phase flow channel and the feed channel.
[0016] A second set is embedded in the upper port of the disc rack, and a plurality of circles of third convex rings are protruded upward on the upper surface of the second set, and a third annular groove is formed between two adjacent circles of the third convex rings; a plurality of circles of first convex rings are protruded downward on the lower surface of the light phase centripetal pump, and a first annular groove is formed between adjacent first convex rings; the second labyrinth gap is a tortuous path formed by the third convex ring and the third annular groove of the second set and the first convex ring and the first annular groove of the light phase centripetal pump interlaced with each other.
[0017] The second blade is disposed before the second labyrinth gap.
[0018] The second labyrinth gap is arranged between the light phase flow channel and the feed chamber to prevent the material in the feed chamber from leaking into the light phase flow channel and increasing the water content of the light phase, thereby affecting the light phase separation effect.
[0019] The beneficial effects of the present invention are as follows:
[0020] The present invention sets a second blade at the upper part of the feed chamber. The second blade can be a spiral blade or an inclined plate blade, which is evenly distributed in the channel and set at a certain inclination angle. For the volatilized upward-moving mist generated by the material with extremely high feed flow rate, the second blade can form a local downward air pressure at the upper part of the feed chamber to press the material mist in the feed chamber downward back into the feed channel, thereby preventing most of the material mist from entering the light phase channel, and further using a second labyrinth gap seal to isolate a small amount of material mist passing through. The second labyrinth gap is set between the light phase flow channel and the feed chamber to prevent the material in the feed chamber from leaking into the light phase flow channel and increasing the water content of the light phase, affecting the light phase separation effect. The first labyrinth gap is set between the light phase flow channel and the heavy phase flow channel. The first labyrinth gap realizes a labyrinth seal between the light phase flow channel and the heavy phase flow channel, preventing the material in the heavy phase flow channel from leaking into the light phase flow channel and increasing the water content of the light phase, affecting the light phase separation effect. The present invention adopts labyrinth seals in adjacent flow channels, thereby avoiding cross contamination between the light phase and the heavy phase, and between the light phase and the material to be separated, and ensuring the effect of oil-water separation. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 A top view of an existing disc.
[0022] Figure 2 It is a cross-sectional view of the disc separator of the present invention.
[0023] Figure 3 for Figure 2 The enlarged view of part A in the middle shows the present invention.
[0024] Figure 4 This is a three-dimensional diagram of the cyclone of the first embodiment.
[0025] Figure 5 It is a cross-sectional view of the cyclone of the second embodiment.
[0026] Figure 6 It is a top view of the disc of the present invention.
[0027] In the figure: 1, housing; 2, disc rack; 3, heavy phase centripetal pump; 4, feed pipe; 5, feed channel; 6, feed port; 7, light phase outlet; 8, light phase upper flow channel; 9, heavy phase outlet; 10, heavy phase upper flow channel; 11, heavy phase collection area; 12, first set; 13, light phase centripetal pump; 14, heavy phase lower flow channel; 15, second set; 16, disc gland; 17, disc; 18, diverter plate; 19, neutral hole; 20, cyclone; 21, feed cavity; 22, separation cavity; 23, light phase collection area; 24, light phase lower flow channel; 25, guide channel; 26, first annular groove; 27, first convex ring; 30, third annular groove; 31, third convex ring; 32, fourth annular groove; 33, fourth convex ring; 34, fifth convex ring; 35, fifth annular groove; 36, first labyrinth gap; 37, second labyrinth gap; 38, center axis; 39, first blade; 40, sleeve; 41, external thread; 42, spacer; 43, distribution hole; 44, second blade. DETAILED DESCRIPTION
[0028] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.
[0029] Embodiment 1:
[0030] like Figure 2As shown, the disc separator of the present invention comprises a rotary drum and a central feed pipe 4. A disc rack 2 is arranged in the inner cavity of the outer shell 1 of the rotary drum, and the disc rack 2 divides the inner cavity of the outer shell 1 into a feed chamber 21 and a separation chamber 22. The outer shell 1 of the rotary drum and the disc rack 2 are both rotating moving parts, and the feed pipe 4 is a non-rotating stationary part. A disc pressure cover 16 and a plurality of conical discs 17 are arranged on the disc rack 2 on one side of the separation chamber 22, from top to bottom, and a heavy phase downflow channel 14 is formed between the outer wall surface of the disc pressure cover 16 and the inner wall surface of the outer shell 1. A light phase downflow channel 24 is provided between the outer wall of the rack 2 and the inner sides of the plurality of discs 17. Both the heavy phase downflow channel 14 and the light phase downflow channel 24 are connected to the separation chamber 22. The plurality of discs 17 divide the separation chamber 22 into a plurality of thin-layer separation spaces, thereby shortening the sedimentation distance, increasing the sedimentation area, and improving and enhancing the separation effect. The bottom of the disc rack 2 is a conical diverter plate 18, and a plurality of neutral holes 19 are evenly arranged along the circumference of the diverter plate 18. The neutral holes 19 connect the feed chamber 21 and the separation chamber 22, and the material in the feed chamber 21 enters the separation chamber 22 through the neutral holes 19. A heavy phase centripetal pump 3 is provided at the upper opening of the outer shell 1. The heavy phase centripetal pump 3 is located above the disc rack 2, and its lower end surface is a certain distance away from the upper end surface of the disc rack 2; a heavy phase upper flow channel 10 is opened on the heavy phase centripetal pump 3, and the heavy phase upper flow channel 10 is connected to the heavy phase outlet 9, and the heavy phase lower flow channel 14 in the drum is connected to the heavy phase outlet 9 through the heavy phase centripetal pump 3. A feed pipe 4 is provided on the heavy phase centripetal pump 3, and the lower part of the feed pipe 4 extends into the feed cavity 21. The interior of the feed pipe 4 is a feed channel 5, and the feed channel 5 is connected to the feed port 6; a light phase upper flow channel 8 is provided between the feed pipe 4 and the heavy phase centripetal pump 3, and the light phase upper flow channel 8 is connected to the light phase outlet 7; a light phase centripetal pump 13 is provided on the outer periphery of the feed pipe 4, below the heavy phase centripetal pump 3 and above the disc rack 2, and a certain distance is spaced between the lower surface of the light phase centripetal pump 13 and the upper surface of the disc rack 2; a through guide channel 25 is radially opened on the light phase centripetal pump 13, and the guide channel 25 is connected to the light phase upper flow channel 8.
[0031] like Figure 2 , Figure 3 As described above, a heavy phase collection area 11 is formed between the outer surface of the heavy phase centripetal pump 3 and the corresponding inner surface of the shell 1. Figure 3 As shown, the heavy phase collection area 11 is connected to the heavy phase upper flow channel 10 and the heavy phase lower flow channel 14 respectively. The heavy phase upper flow channel 10, the heavy phase lower flow channel 14 and the heavy phase collection area 11 constitute a heavy phase flow channel. The separation chamber 22 is connected to the heavy phase outlet 9 through the heavy phase flow channel. Figure 4 As shown, the lower surface of the heavy-phase centripetal pump 3 has a plurality of circles of fifth convex rings 34 protruding axially downward, and a fifth annular groove 35 is formed between two adjacent circles of the fifth convex rings 34 .
[0032] like Figure 2 , Figure 3As shown, the upper end of the disc cover 16 is embedded with the first sleeve 12, and the upper part of the first sleeve 12 extends from the upper end of the disc cover 16. The upper surface of the first sleeve 12 has a plurality of circles of fourth protruding rings 33 protruding upward corresponding to the fifth annular groove 35, and a fourth annular groove 32 is formed between two adjacent circles of the fourth protruding rings 33. The fourth protruding ring 33 extends into the fifth annular groove 35, and the fifth protruding ring 34 extends into the fourth annular groove 32, forming a staggered, tortuous first labyrinth gap 36.
[0033] like Figure 2 , Figure 3 As shown, the first set 12 is sleeved on the outer periphery of the light phase centripetal pump 13, and a light phase collection area 23 is formed between the inner surface of the first set 12 and the outer surface of the light phase centripetal pump 13, and the light phase collection area 23 is respectively connected with the light phase lower flow channel 24 and the guide channel 25; the light phase upper flow channel 8, the light phase lower flow channel 24, the guide channel 25 and the light phase collection area 23 constitute the light phase flow channel, and the separation chamber 22 is connected with the light phase outlet 7 through the light phase flow channel. The lower surface of the light phase centripetal pump 13 protrudes downward with a plurality of circles of first convex rings 27, and a first annular groove 26 is formed between two adjacent circles of first convex rings 27.
[0034] like Figure 2 , Figure 3 As shown, the upper end of the disc rack 2 is embedded with a second set 15, the upper part of the second set 15 extends from the upper end of the disc rack 2, and the second set 15 rotates at high speed along with the disc rack 2, and is a moving part. The upper surface of the second set 15 protrudes upward with a plurality of circles of third convex rings 31, and a third annular groove 30 is formed between two adjacent circles of the third convex rings 31. The third convex ring 31 extends into the first annular groove 26, and the first convex ring 27 extends into the third annular groove 30, forming a staggered, tortuous second labyrinth gap 37. On the inner circumferential surface of the lower part of the second set 15, located on the outer periphery of the feed pipe 4, a plurality of second blades 44 are fixedly arranged. The second blades 44 are located at the upper part of the feed chamber 21 and are arranged before the second labyrinth gap 37. The second blades 44 can be spiral blades or inclined plate blades, evenly distributed in the channel and set at a certain inclination angle; in this embodiment, four inclined plate blades are arranged at the upper part of the feed chamber 21; since the feed flow rate of the material is extremely high, a large amount of atomization and volatilization will occur and move upward. If the mist enters the light phase channel, it will affect the purity of the light phase. The second blades 44 and the second set 15 move at high speed together, and a local downward air pressure can be formed on the upper part of the feed chamber 21 to press the material mist in the feed chamber 21 downward back into the feed channel 5, thereby preventing most of the material mist from entering the light phase flow channel, and the small amount of material mist passing through is further isolated by sealing with the second labyrinth gap 37.
[0035] like Figure 3As shown, there is a first labyrinth gap 36 between the light phase flow channel and the heavy phase flow channel, and a second labyrinth gap 37 and a second blade 44 are provided between the light phase flow channel and the feed chamber 21; the first labyrinth gap 36 realizes a labyrinth seal between the light phase flow channel and the heavy phase flow channel, preventing the material in the heavy phase flow channel from leaking into the light phase flow channel and increasing the water content of the light phase, thereby affecting the light phase separation effect. The second labyrinth gap 37 and the second blade 44 realize a labyrinth seal between the light phase flow channel and the feed chamber 21, preventing the material in the feed chamber 21 from leaking into the light phase flow channel and increasing the water content of the light phase, thereby affecting the light phase separation effect. The present invention adopts a labyrinth seal in adjacent flow channels, thereby avoiding cross contamination between the light phase and the heavy phase, and between the light phase and the material to be separated, thereby ensuring the effect of oil-water separation.
[0036] like Figure 2 As shown, a cyclone 20 is fixedly disposed at the lower end of the feed pipe 4 located in the feed cavity 21, and the cyclone 20 is located in the feed channel 5. Figure 4 As shown, the outer circumference of the cylindrical central shaft 38 of the cyclone 20 is spirally formed along the axial direction to form a spiral first blade 39, and the liquid outlet rotation direction of the first blade 39 is consistent with the rotation direction of the drum; in this embodiment, three mutually parallel spiral first blades 39 are evenly arranged on the outer circumference of the central shaft 38, and the adjacent first blades 39 are arranged at 120 degrees. Figure 2 As shown, each first blade 39 is fixed to the inner circumference or the mouth of the feed pipe 4 by welding. After the material flows through the cyclone 20, it enters the feed chamber 21. The cyclone 20 accelerates the material to a higher rotation speed, so that the material rotates into the feed chamber 21 with an initial speed. On the one hand, the material has a rotational centrifugal force when entering the feed chamber 21. Under the action of the rotational centrifugal force, the material is uniformly introduced into the feed chamber 21, and the material flow rate of each part in the feed chamber 21 is uniform, which is conducive to the uniform and sufficient separation of the water in the material of each part in the feed chamber 21; in addition, under the action of the initial rotational centrifugal force, the material performs a preliminary separation of oil and water, that is, the material preliminarily separates oil and water in the feed chamber 21, thereby reducing the water content of the light phase entering the separation chamber 22 from the feed chamber 21, which is conducive to the material fully separating the water in the separation chamber 22, ensuring the separation effect of the light phase, and the water content of the separated light phase is low; in addition, the spiral feed rotation direction is consistent with the rotation direction of the drum. When the material enters the inside of the drum, the impact of the material on the distributor is reduced, the emulsification of the material is reduced, and the separation efficiency is improved. Moreover, the material rotating into the feed chamber 21 can also avoid the material concentration in the center of the disc rack 2, thereby preventing the formation of solid phase deposition. When the input material flow rate is large, the initial downward velocity of the spiral can prevent the material from moving upward along the axial direction, reducing the risk of mixing the material to be separated with the light phase.
[0037] like Figure 2 As shown, the disc 17 is a cone. Figure 6 As shown, a plurality of spacers 42 are arranged along the axial direction on the conical wall surface, and the plurality of spacers 42 are evenly distributed along the radial direction. A through distribution hole 43 is provided between two adjacent spacers 42 and at the lower part of the conical wall surface. The distribution hole 43 is provided at the position of the spacer 42 in front of the rotating drum in the forward direction of rotation. Compared with the existing disc 17, the area between the distribution hole 43 and the rear spacer 42 is expanded by nearly one time. After the material enters the disc 17 from the distribution hole 43, under the action of centrifugal force, it rotates along the surface of the disc 17 toward the rear spacer 42 and generates eddy current. Due to the increase in the area between the distribution hole 43 and the rear spacer 42, under the same working conditions, the water phase in the material is fully diffused in the flow field area between the distribution hole 43 and the rear spacer 42, thereby reducing the volume fraction of the water phase in the flow field area, improving the oil-water separation effect, and the water content in the separated light phase is low. The surface of the disc 17 is precisely finished or coated. The coating material can be Teflon, etc., to increase the smoothness of the surface of the disc 17, reduce the friction coefficient of the surface, and thus reduce the surface tension between the material and the surface of the disc 17, which is beneficial to the separation of the light phase and the heavy phase between the discs 17 and improve the separation accuracy.
[0038] Embodiment 2:
[0039] The disc separator of the present invention has the same structural features as the first embodiment, and the cyclone 20 can also be Figure 5 As shown, the cyclone 20 includes a central shaft 38, a first blade 39, and a sleeve 40. The interior of the sleeve 40 is a through central hole. The first blade 39 is spirally wrapped around the outer circumference of the central shaft 38 along the axial direction. The outer circumference of the first blade 39 is fixed to the inner circumference of the cylindrical sleeve 40 by welding. The upper part of the outer circumference of the sleeve 40 is provided with an external thread 41. The inner circumference of the lower part of the feed pipe 4 is correspondingly provided with an internal thread, and the cyclone 20 is fixed to the feed pipe 4 by screwing.
[0040] When the disc separator of the present invention is actually used, the disc rack 2, the disc 17 and the disc cover 16 rotate together with the drum, and the material to be separated (such as mineral oil) enters the feed pipe 4 from the feed port 6, flows through the cyclone 20 at the lower end of the feed pipe 4 for preliminary rotation acceleration, and then enters the feed chamber 21 of the drum, and performs preliminary oil-water separation in the feed chamber 21; the material after preliminary oil-water separation enters the separation chamber 22 through the neutral hole 19, and then enters the surface of the disc 17 through the distribution hole 43 on the disc 17 to perform centrifugal rotation. Under the action of the centrifugal force of high-speed rotation, the heavy material with higher density is separated. The phase (water, etc.) is thrown outward to the heavy phase lower flow channel 14, and then flows upward through the heavy phase gathering area 11 into the heavy phase centripetal pump 3, and the heavy phase centripetal pump 3 converts the rotational kinetic energy into upward potential energy, and finally discharges it from the heavy phase outlet 9; the light phase (clean oil) with a smaller density moves toward the inside along the surface of the disc 17, and gathers in the light phase lower flow channel 24, and continues to move upward under the action of centrifugal force, and flows into the light phase centripetal pump 13 through the light phase gathering area 23, and the light phase centripetal pump 13 converts the rotational kinetic energy into upward potential energy, and then flows to the light phase upper flow channel 8 through the guide channel 25, and finally is discharged from the light phase outlet 7. After the preliminary oil-water separation of the material to be separated by the cyclone 20, the water content of the material entering the separation chamber 22 from the feed chamber 21 is reduced; the material entering the separation chamber 22 is further separated from the oil and water on the disc 17. Since the area between the distribution hole 43 on the disc 17 and the rear partition 42 is enlarged, and the surface finish of the disc 17 is very high, the material is fully separated from the oil and water in the separation chamber 22, and the separation effect is good. Moreover, the light phase collection area 23 of the light phase output, the light phase upper flow channel 8 and the heavy phase lower flow channel 14 and the feed chamber 21 are all sealed with a labyrinth seal to ensure the separation effect of the light phase. After the material to be separated is separated from the oil and water by the present invention, the water content of the oil after separation can reach below 5-100ppm, which greatly improves the accuracy of oil-water separation and can meet the needs of special industries with high requirements for separation effect and low requirements for water content.
[0041] The above description is an explanation of the present invention, not a limitation of the present invention. Without violating the spirit of the present invention, the present invention can be modified in any form. All structural features of the present invention can be applied to disc separators for separating materials of different densities such as two-phase or three-phase. For example, according to the accuracy requirements of oil-water separation, one or more spiral first blades 39 can be set on the cyclone 20, as long as the purpose of providing preliminary rotation acceleration to the material is achieved. The spiral first blade 39 of the cyclone 20 can also be set on the entire length of the feed channel 5 of the feed pipe 4, and the material to be separated can obtain a longer acceleration rotation stroke in the feed channel 5, obtain a higher acceleration rotation speed, and the preliminary oil-water separation effect of the material is better, providing the accuracy of oil-water separation. The cyclone 20 can also be fixed to the feed pipe 4 by other means, such as snaps. The spiral first blade 39 can also be directly welded and fixed on the lower end surface of the feed pipe 4, and the first blade 39 is located on the feed channel 5. The first blade 39 may also be an inclined plate blade, which is evenly distributed in the feed channel 5 and is set at a certain inclination angle, and the direction of rotation of the liquid discharged through the inclined plate blade is consistent with the direction of rotation of the drum. The cyclone 20 may also not be provided with a central axis 38, and the outer periphery or end surface of the first blade 39 is directly fixed in the feed pipe 4. The second blade 44 may also be fixedly set at a corresponding position on the outer periphery of the feed pipe 4 which is a stationary part, as long as a downward local air pressure is formed in the upper part of the feed chamber 21. The second blade 44 may be one piece or multiple pieces, evenly set at equal angles, as long as the purpose of forming a downward local air pressure in the upper part of the feed chamber 21 can be achieved.
Claims
1. A sealing structure of a disc separator, wherein a disc rack (2) is arranged inside a housing (1) of a rotary drum, the interior of the rotary drum is connected to a feed port (6) through a feed channel (5), connected to a heavy phase outlet (9) through a heavy phase flow channel, and connected to a light phase outlet (7) through a light phase flow channel; characterized in that: A plurality of second blades (44) are arranged at the upper part of the feed chamber (21), and the second blades (44) are arranged at an angle so that local downward air pressure can be generated when the drum rotates; the heavy phase centrifugal pump (3) is located above the disc rack (2), and its lower end surface is a certain distance away from the upper end surface of the disc rack (2); a disc pressure cover (16) is arranged above the disc rack (2), and a first set (12) is embedded in the upper end portion of the disc pressure cover (16); a first labyrinth gap (36) is arranged between the light phase flow channel and the heavy phase flow channel, and the first labyrinth gap (36) is a tortuous path formed between the heavy phase centrifugal pump (3) and the first set (12).
2. The sealing structure of the disc separator according to claim 1, characterized in that: The second blade (44) is a spiral blade or an inclined plate blade.
3. The sealing structure of the disc separator according to claim 1, characterized in that: The second blade (44) is arranged on the moving part or the stationary part.
4. The sealing structure of the disc separator according to claim 1, characterized in that: The second blades (44) are multiple and are evenly arranged at equal angles.
5. The sealing structure of the disc separator according to claim 1, characterized in that: The upper surface of the first set (12) has a plurality of circles of fourth convex rings (33) protruding upward, and a fourth annular groove (32) is formed between two adjacent circles of the fourth convex rings (33); the lower surface of the heavy-phase centripetal pump (3) has a plurality of circles of fifth convex rings (34) protruding downward, and a fifth annular groove (35) is formed between two adjacent circles of the fifth convex rings (34); and the first labyrinth gap (36) is a zigzag path formed by the fourth convex ring (33) and the fourth annular groove (32) of the first set (12) and the fifth convex ring (34) and the fifth annular groove (35) of the heavy-phase centripetal pump (3) interlacing with each other.
6. The sealing structure of the disc separator according to claim 1, characterized in that: A second labyrinth gap (37) is provided between the light phase flow channel and the feed channel (5).
7. The sealing structure of the disc separator according to claim 6, characterized in that: A second sleeve (15) is embedded in the upper end portion of the disc rack (2); a plurality of third convex rings (31) are protruding upward from the upper surface of the second sleeve (15); a third annular groove (30) is formed between two adjacent third convex rings (31); a plurality of first convex rings (27) are protruding downward from the lower surface of the light phase centripetal pump (13); a first annular groove (26) is formed between adjacent first convex rings (27); and the second labyrinth gap (37) is a zigzag path formed by the third convex ring (31) and the third annular groove (30) of the second sleeve (15) and the first convex ring (27) and the first annular groove (26) of the light phase centripetal pump (13) interlacing with each other.
8. The sealing structure of the disc separator according to claim 6, characterized in that: The second blade (44) is arranged before the second labyrinth gap (37).