A three-phase horizontal screw sedimentation centrifuge

Abstract

This invention discloses a three-phase horizontal screw sedimentation centrifuge, relating to the field of centrifuge technology. The centrifuge includes a base, with an organic body mounted on top of the base. A central feed assembly is installed inside the organic body, and a screw conveyor assembly is installed outside the central feed assembly. A rotating drum assembly is installed outside the screw conveyor assembly. A pump sleeve is provided on the discharge side of the rotating drum assembly, and an impeller sleeve is rotatably connected to one side of the pump sleeve. A rotating impeller is connected to the end of the impeller sleeve via a pin. An inner ring limiting baffle is installed on the light liquid outlet side of the rotating drum assembly. An adjusting rod drives the rotating impeller and impeller sleeve to rotate. By utilizing the eccentricity between the fixed part of the pump sleeve and the mating part of the rotating impeller, the radial dimension of the impeller opening changes, adjusting the depth of the rotating impeller's immersion in the light liquid phase layer and altering the radial position of the separation interface between the light and heavy liquid phases; thus improving the separation purity of the light and heavy liquid phases and the product recovery rate.

Description

Technical Field

[0001] This invention relates to the field of centrifuge technology, specifically a three-phase horizontal screw sedimentation centrifuge. Background Technology

[0002] The three-phase horizontal screw centrifuge is a device that achieves continuous separation of solid, liquid, and light phases based on the principle of centrifugal sedimentation. It is widely used in fields such as kitchen waste treatment, oilfield produced fluid treatment, oil refining, and chemical wastewater treatment. By generating a strong centrifugal force field through a high-speed rotating drum, the density differences between the solid, heavy, and light liquid phases in the material are utilized to form a concentric ring-shaped stratified structure within the drum. The three phases are then continuously separated and discharged through a screw conveyor and an independent discharge port. It has the advantages of large processing capacity, high degree of automation, and continuous and stable operation.

[0003] Existing three-phase horizontal screw sedimentation centrifuges still suffer from insufficient precision in adjusting the separation interface during practical use. Traditional three-phase centrifuges often use fixed overflow weirs or simple mechanical adjustment methods to separate the light and heavy liquid phases, resulting in low adjustment precision, inconvenient operation, and difficulty in accurately adjusting the stratification interface position according to changes in material density, viscosity, solids content, and other characteristics. Deviations in the interface position can lead to the mixing of the heavy liquid phase into the light liquid phase or the entrainment of the light liquid phase into the heavy liquid phase, causing the two phases to mix and severely reducing separation purity and product recovery rate. Summary of the Invention

[0004] The purpose of this invention is to provide a three-phase horizontal screw centrifuge to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: The centrifuge includes a base, an organic body is mounted on the top of the base, a main drive motor is mounted on one side of the base, an auxiliary variable frequency motor is mounted on the other side of the base, a planetary differential is mounted on one side of both the main drive motor and the auxiliary variable frequency motor, a central feeding assembly is mounted inside the organic body, a screw conveyor assembly is mounted outside the central feeding assembly, a drum assembly is mounted outside the screw conveyor assembly, a liquid phase discharge mechanism is mounted on one side of the drum assembly, one side of one of the planetary differentials is connected to one side of the drum assembly, and one side of the other planetary differential is connected to one side of the screw conveyor assembly; The liquid discharge mechanism includes a centripetal pump assembly and an inner ring limiting baffle. The centripetal pump assembly includes a pump sleeve, an impeller sleeve, a rotating impeller, and a pin. The discharge side of the drum assembly is provided with a pump sleeve. One side of the pump sleeve is rotatably connected to an impeller sleeve. The end of the impeller sleeve is assembled and connected to a rotating impeller via a pin. An inner ring limiting baffle is installed on the light liquid outlet side of the drum assembly.

[0006] As a preferred technical solution, the liquid phase discharge mechanism further includes a connecting sleeve and an adjusting rod. The connecting sleeve is connected to one side of the rotating impeller, and the adjusting rod is installed on one side of the connecting sleeve. A separation groove is opened on one side of the inner ring limiting baffle, and a heavy liquid flow channel outlet is connected to one side of the separation groove.

[0007] As a preferred technical solution, the drum assembly includes a cylindrical separation section and a conical drying and slag discharge section, the cylindrical separation section and the conical drying and slag discharge section are connected, and a solid phase slag discharge port is provided at the end of the conical drying and slag discharge section.

[0008] As a preferred technical solution, the spiral conveying assembly includes a hollow main shaft and spiral blades. The hollow main shaft has a feeding and distribution bin inside, and the spiral blades are fixedly connected to the outside of the hollow main shaft.

[0009] As a preferred technical solution, the spiral conveying assembly further includes scraping teeth, and scraping teeth are fixed at the ends of the spiral blades. The scraping teeth are arranged in the conical drying and slag discharge section near the solid phase slag discharge port.

[0010] As a preferred technical solution, the output end of the main drive motor is connected to the input end of the drum assembly through one of the planetary differentials, and the output end of the auxiliary variable frequency motor is connected to the hollow main shaft of the screw conveyor assembly through another planetary differential.

[0011] As a preferred technical solution, the machine body is provided with a solid phase collection chamber, a heavy liquid phase collection chamber and a light liquid phase collection chamber. The solid phase collection chamber is located below the solid phase slag discharge port, the heavy liquid phase collection chamber is located below the heavy liquid flow channel outlet, and the light liquid phase collection chamber is located outside the connecting sleeve outlet.

[0012] As a preferred technical solution, the outlet end of the central feeding component extends into the feeding and distributing bin inside the hollow main shaft.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses an adjusting rod and connecting sleeve to drive the rotating impeller and impeller sleeve to rotate synchronously. By utilizing the eccentricity between the fixed part of the pump sleeve and the mating part of the rotating impeller, the radial dimension of the impeller opening changes with the rotation angle, thereby adjusting the depth of the rotating impeller immersed in the light liquid phase layer and changing the radial position of the separation interface between the light and heavy liquid phase layers. It can be adjusted in real time according to changes in material density, solids content, and other characteristics, improving the separation purity of the light and heavy liquid phases and the product recovery rate.

[0014] 2. This invention achieves stable and independent discharge of the heavy liquid phase through the cooperation structure of the inner ring limiting baffle and the separation tank. The inner ring limiting baffle defines the inner boundary of the heavy liquid phase layer. The heavy liquid phase is thrown out from the heavy liquid flow channel outlet on the peripheral wall of the drum through the separation tank and enters the heavy liquid phase collection chamber. The light liquid phase is discharged from the inside through the rotating impeller into the centripetal pump flow channel and enters the light liquid phase collection chamber. The solid phase is pushed by the spiral blades to the conical drying slag discharge section and discharged through the solid phase slag discharge port and enters the solid phase collection chamber. The three phases are discharged continuously through three independent channels without interference, which improves the separation stability.

[0015] 3. This invention adopts a dual-motor, dual-planetary differential independent drive structure. The main drive motor drives the drum assembly to rotate through the planetary differential, and the auxiliary variable frequency motor drives the screw conveyor assembly to rotate through another set of planetary differentials. The differential speed between the drum and the screw conveyor assembly can be flexibly adjusted by the auxiliary variable frequency motor, and the differential speed parameters can be adjusted according to the settling characteristics and processing requirements of different materials. At the same time, scraping teeth are set at the ends of the screw blades, which can thoroughly scrape the solid material at the slag discharge port of the cone drying slag discharge section, avoid material accumulation and blockage, and improve the smoothness of slag discharge and the dryness of the solid phase. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the first partial cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the second partial cross-sectional structure of the present invention; Figure 4 This is a schematic diagram of the first partial structure of the present invention; Figure 5 This is a schematic diagram of the second partial structure of the present invention; Figure 6 This is a side view of the present invention; Figure 7 for Figure 3 Enlarged structural diagram at point A in the diagram; Figure 8 This is a schematic diagram of the material discharge structure of the present invention.

[0017] In the diagram: 1. Base; 2. Main drive motor; 3. Auxiliary variable frequency motor; 4. Planetary differential; 5. Drum assembly; 501. Cylindrical separation section; 502. Conical drying and slag discharge section; 503. Solid phase slag discharge port; 6. Screw conveyor assembly; 601. Hollow main shaft; 602. Feeding and distribution bin; 603. Spiral blades; 604. Scraper teeth; 7. Center feeding assembly; 8. Liquid phase discharge mechanism; 801. Inner ring limiting baffle; 802. Adjusting rod; 803. Connecting sleeve; 804. Rotating impeller; 805. Pin shaft; 806. Separation tank; 807. Pump sleeve; 808. Impeller sleeve; 9. Machine body; 901. Solid phase collection chamber; 902. Heavy liquid phase collection chamber; 903. Light liquid phase collection chamber. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example: Figures 1-8 As shown, the present invention provides a technical solution for a three-phase horizontal screw sedimentation centrifuge. The centrifuge includes a base 1, an organic body 9 mounted on the top of the base 1, a main drive motor 2 mounted on one side of the base 1, an auxiliary variable frequency motor 3 mounted on the other side of the base 1, a planetary differential 4 mounted on one side of both the main drive motor 2 and the auxiliary variable frequency motor 3, a central feed assembly 7 mounted inside the organic body 9, a screw conveyor assembly 6 mounted outside the central feed assembly 7, a drum assembly 5 mounted outside the screw conveyor assembly 6, a liquid phase discharge mechanism 8 mounted on one side of the drum assembly 5, one side of one planetary differential 4 connected to one side of the drum assembly 5, and one side of the other planetary differential 4 connected to one side of the screw conveyor assembly 6. The liquid phase discharge mechanism 8 includes a centripetal pump assembly and an inner ring limiting baffle 801. The centripetal pump assembly includes a pump sleeve 807, an impeller sleeve 808, a rotating impeller 804, and a pin 805. The discharge side of the drum assembly 5 is provided with a pump sleeve 807. One side of the pump sleeve 807 is rotatably connected to the impeller sleeve 808. The end of the impeller sleeve 808 is assembled and connected to the rotating impeller 804 through the pin 805. The inner ring limiting baffle 801 is installed on the light liquid outlet side inside the drum assembly 5. The liquid phase discharge mechanism 8 also includes a connecting sleeve 803 and an adjusting rod 802. One side of the rotating impeller 804 is connected to the connecting sleeve 803. One side of the connecting sleeve 803 is installed with the adjusting rod 802. A separation groove 806 is opened on one side of the inner ring limiting baffle 801. One side of the separation groove 806 is connected to the heavy liquid flow channel outlet. The output end of the main drive motor 2 is connected to the input end of the drum assembly 5 through one of the planetary differentials 4. The output end of the auxiliary variable frequency motor 3 is connected to the hollow main shaft 601 of the screw conveyor assembly 6 through another planetary differential 4. The outlet end of the central feeding assembly 7 extends into the feeding and spreading bin 602 inside the hollow main shaft 601. The base 1 provides the installation support foundation for the whole machine. The machine body 9 is fixedly installed on the top of the base 1, providing protection and housing space for the internal rotating parts. The main drive motor 2 and the auxiliary variable frequency motor 3 are respectively installed on both sides of the base 1, and each achieves speed reduction and torque increase output through a set of planetary differentials 4. The main drive motor 2 drives the drum assembly 5 to rotate at high speed through the left planetary differential 4, providing the speed required for centrifugal separation. The auxiliary variable frequency motor 3 drives the screw conveyor assembly 6 to rotate through the right planetary differential 4. By controlling the speed of the auxiliary variable frequency motor 3, the differential speed between the screw conveyor assembly 6 and the drum assembly 5 can be adjusted, thereby adjusting the solid phase conveying speed and residence time to adapt to the separation requirements of different materials. The central feeding assembly 7 extends into the equipment from the end, and its outlet end is inserted into the feeding hopper 602 of the hollow main shaft 601. The mixed materials to be separated are continuously fed into the equipment through the central feeding assembly 7 to achieve stable feeding. A liquid phase discharge mechanism 8 is installed on the discharge side of the drum assembly 5 to achieve separate discharge of light and heavy liquid phases. An inner ring limiting baffle 801 is fixedly installed inside the drum assembly 5 on the light liquid outlet side to limit the inner radial position of the heavy liquid phase layer. A separation tank 806 is formed on the inner ring limiting baffle 801, through which the heavy liquid phase flows to the heavy liquid flow channel outlet on the drum's peripheral wall and is thrown outwards. A centripetal pump assembly is used to discharge the light liquid phase. A pump sleeve 807 is fixedly installed at the discharge end of the drum assembly 5 and rotates synchronously with the drum. An impeller sleeve 808 is rotatably connected to the inner side of the pump sleeve 807, and a rotating impeller 804 is fixedly installed at the end of the impeller sleeve 808 via a pin 805. The connecting sleeve 803 is connected to the outside of the rotating impeller 804, and the adjusting rod 802 extends from the end for easy adjustment by the operator. There is an eccentricity between the center of the part of the pump sleeve 807 that mates with the rotating impeller 804 and the center of the fixed part of the pump sleeve 807. When the adjusting rod 802 is rotated, the connecting sleeve 803, the rotating impeller 804 and the impeller sleeve 808 rotate relative to the pump sleeve 807, and the radial dimension of the opening of the rotating impeller 804 changes accordingly, thereby adjusting the depth of the rotating impeller 804 immersed in the light liquid phase layer, realizing precise adjustment of the separation and stratification interface position. After the adjustment is in place, the relative angle between the rotating impeller 804 and the impeller sleeve 808 is locked by the pin 805 to maintain stable operation.

[0020] like Figures 1-3 , Figure 7As shown, the drum assembly 5 includes a cylindrical separation section 501 and a conical drying and slag discharge section 502. The cylindrical separation section 501 and the conical drying and slag discharge section 502 are connected. A solid phase slag discharge port 503 is provided at the end of the conical drying and slag discharge section 502. The drum assembly 5 has a horizontal cylindrical conical structure, consisting of a cylindrical separation section 501 and a conical drying and slag discharge section 502, which are sealed together. The cylindrical separation section 501 has a larger diameter and is the main sedimentation and separation area, where the material has sufficient residence time for centrifugal sedimentation and stratification. The diameter of the conical drying and slag discharge section 502 gradually decreases, forming a conical cavity. The solid material settling on the inner wall of the drum is pushed to the end by the spiral blades 603 in this section, gradually detaching from the liquid pool and further dehydrating and drying under centrifugal force to reduce the solid phase moisture content. The end of the conical drying and slag discharge section 502 has multiple solid phase slag discharge ports 503 along its peripheral wall. The dehydrated solid material is thrown outward from the solid phase slag discharge ports 503, completing the continuous discharge of the solid phase.

[0021] like Figures 1-3 As shown, the screw conveyor assembly 6 includes a hollow main shaft 601 and a screw blade 603. The hollow main shaft 601 is provided with a feeding and distribution bin 602. The screw blade 603 is fixedly connected to the outside of the hollow main shaft 601. The screw conveyor assembly 6 also includes scraper teeth 604. The scraper teeth 604 are fixed at the ends of the screw blades 603. The scraper teeth 604 are arranged in the conical drying and slag discharge section 502 on the side near the solid phase slag discharge port 503. The screw conveyor assembly 6 is coaxially installed inside the drum assembly 5 and rotates in the same direction with the drum assembly 5 at a differential speed. It is used to continuously push the solid material settled on the inner wall of the drum to the slag discharge end. The hollow main shaft 601 is the main support body of the screw conveyor assembly 6. Its internal cavity forms the feed and distribution bin 602. The material fed by the central feed assembly 7 first enters the feed and distribution bin 602, and then is evenly distributed into the separation chamber of the drum assembly 5 through the distribution holes on the peripheral wall of the hollow main shaft 601, avoiding the material from directly impacting the inner wall of the drum and causing disturbance. The screw blades 603 are continuously fixed axially to the hollow main shaft 601. The outer wall of the drum is spirally distributed and rotates synchronously with the hollow main shaft 601. The solid material settled on the inner wall of the drum is conveyed from the cylindrical separation section 501 to the end of the conical drying and slag discharge section 502 by the pushing action of the spiral surface. The scraper teeth 604 are fixedly installed at the conical end of the spiral blade 603, close to the solid slag discharge port 503. They rotate synchronously with the spiral blade 603 and can thoroughly scrape and push out the solid material at the end of the conical section and the solid slag discharge port 503, preventing the material from adhering and accumulating and causing blockage of the slag discharge port, ensuring smooth slag discharge, and improving the dryness of the solid material.

[0022] like Figures 1-3As shown, the machine body 9 is provided with a solid phase collection chamber 901, a heavy liquid phase collection chamber 902 and a light liquid phase collection chamber 903. The solid phase collection chamber 901 is located below the solid phase discharge port 503, the heavy liquid phase collection chamber 902 is located below the outlet of the heavy liquid flow channel, and the light liquid phase collection chamber 903 is located outside the outlet of the connecting sleeve 803. The machine body 9 is divided into three independent collection chambers by a partition, corresponding to the collection of three-phase materials respectively. The solid phase collection chamber 901 is located below the cone-section drying slag discharge section 502. The solid phase material thrown out from the solid phase slag discharge port 503 falls into the solid phase collection chamber 901 under the action of gravity and is discharged and collected through the bottom discharge port. The heavy liquid phase collection chamber 902 is located below the discharge side of the drum. The heavy liquid phase thrown out from the heavy liquid flow channel outlet flows into the heavy liquid phase collection chamber 902 along the inner wall of the machine body and is discharged through the bottom outlet. The light liquid phase collection chamber 903 is located outside the outlet of the centripetal pump assembly. The light liquid phase discharged through the rotating impeller 804 and the connecting sleeve 803 directly enters the light liquid phase collection chamber 903 and is discharged and collected through the outlet. The three collection chambers are independently sealed to avoid secondary mixing of the three-phase materials during the collection stage and to ensure separation purity.

[0023] The working principle of the present invention is as follows: the mixture to be separated enters the feeding and distributing bin 602 inside the hollow main shaft 601 through the central feeding component 7, and enters the drum assembly 5 through the distributing holes on the peripheral wall of the hollow main shaft 601. The main drive motor 2 drives the drum assembly 5 to rotate through a planetary differential 4, and the auxiliary variable frequency motor 3 drives the screw conveyor assembly 6 to rotate in the same direction as the drum assembly 5 in a differential manner through another planetary differential 4. The mixture obtains different settling velocities in the centrifugal force field due to the different densities of the light liquid phase, heavy liquid phase and solid phase. The heavy liquid phase and solid phase settle on the inner wall of the drum assembly 5, with the solid phase adhering to the innermost wall, the heavy liquid phase settling on the inner side of the solid phase layer, and the light liquid phase adhering to the inner side of the heavy liquid phase layer. Solid material settled in the drum assembly 5 is pushed by the spiral blades 603 to the end of the cone drying slag discharge section 502, and scraped out from the solid slag discharge port 503 by the scraper teeth 604 and falls into the solid collection chamber 901. The heavy liquid phase is thrown out from the heavy liquid flow channel outlet on the circumferential wall of the drum assembly and falls into the heavy liquid phase collection chamber 902; the light liquid phase enters the centripetal pump assembly flow channel through the opening of the rotating impeller 804, and is discharged through the connecting sleeve 803 and falls into the light liquid phase collection chamber 903. When the separation and stratification interface needs to be adjusted, rotating the adjusting rod 802 drives the connecting sleeve 803 to rotate, which in turn drives the rotating impeller 804 and impeller sleeve 808 to rotate synchronously. The pump sleeve 807 is fixed to the discharge side of the drum assembly 5 and does not rotate relative to the drum assembly 5. There is an eccentricity between the center of the part of the pump sleeve 807 that mates with the rotating impeller 804 and the center of the fixed part of the pump sleeve 807. When the impeller sleeve 808 rotates relative to the pump sleeve 807, the radial dimension of the opening of the rotating impeller 804 changes, the depth of the opening of the rotating impeller 804 immersed in the light liquid phase changes, and the radial position of the separation and stratification interface is adjusted accordingly. After adjustment, the relative angle between the rotating impeller 804 and the impeller sleeve 808 is locked by the pin 805. The solid phase is discharged from the solid phase discharge port 503, the heavy liquid phase is discharged from the heavy liquid flow channel outlet, and the light liquid phase is discharged from the connecting sleeve 803, completing the three-phase continuous separation.

[0024] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A three-phase horizontal decanter centrifuge, characterized in that: The centrifuge includes a base (1), an organic body (9) is mounted on the top of the base (1), a main drive motor (2) is mounted on one side of the base (1), an auxiliary variable frequency motor (3) is mounted on the other side of the base (1), a planetary differential (4) is mounted on one side of both the main drive motor (2) and the auxiliary variable frequency motor (3), a central feed assembly (7) is mounted inside the organic body (9), a screw conveyor assembly (6) is mounted outside the central feed assembly (7), a drum assembly (5) is mounted outside the screw conveyor assembly (6), a liquid phase discharge mechanism (8) is mounted on one side of the drum assembly (5), one side of one of the planetary differentials (4) is connected to one side of the drum assembly (5), and one side of the other planetary differential (4) is connected to one side of the screw conveyor assembly (6). The liquid discharge mechanism (8) includes a centripetal pump assembly and an inner ring limiting baffle (801). The centripetal pump assembly includes a pump sleeve (807), an impeller sleeve (808), a rotating impeller (804), and a pin (805). The discharge side of the drum assembly (5) is provided with a pump sleeve (807). One side of the pump sleeve (807) is rotatably connected to an impeller sleeve (808). The end of the impeller sleeve (808) is assembled and connected to a rotating impeller (804) through a pin (805). An inner ring limiting baffle (801) is installed on the light liquid outlet side of the drum assembly (5).

2. A three-phase horizontal screw centrifuge according to claim 1, characterized in that: The liquid phase discharge mechanism (8) further includes a connecting sleeve (803) and an adjusting rod (802). The connecting sleeve (803) is connected to one side of the rotating impeller (804), and the adjusting rod (802) is installed on one side of the connecting sleeve (803). A separation groove (806) is opened on one side of the inner ring limiting baffle (801), and a heavy liquid flow channel outlet is connected to one side of the separation groove (806).

3. A three-phase horizontal screw centrifuge according to claim 1, characterized in that: The drum assembly (5) includes a cylindrical separation section (501) and a conical drying and slag discharge section (502). The cylindrical separation section (501) and the conical drying and slag discharge section (502) are connected. A solid phase slag discharge port (503) is provided at the end of the conical drying and slag discharge section (502).

4. A three-phase horizontal screw centrifuge according to claim 1, characterized in that: The spiral conveyor assembly (6) includes a hollow main shaft (601) and spiral blades (603). The hollow main shaft (601) has a feeding and feeding bin (602) inside, and the spiral blades (603) are fixedly connected to the outside of the hollow main shaft (601).

5. A three-phase horizontal screw centrifuge according to claim 4, characterized in that: The spiral conveying assembly (6) also includes scraper teeth (604). The ends of the spiral blades (603) are fixed with scraper teeth (604). The scraper teeth (604) are arranged in the conical drying and slag discharge section (502) on the side near the solid phase slag discharge port (503).

6. A three-phase horizontal screw centrifuge according to claim 1, characterized in that: The output end of the main drive motor (2) is connected to the input end of the drum assembly (5) through one of the planetary differentials (4), and the output end of the auxiliary variable frequency motor (3) is connected to the hollow main shaft (601) of the screw conveyor assembly (6) through another planetary differential (4).

7. A three-phase horizontal screw centrifuge according to claim 1, characterized in that: The body (9) is provided with a solid phase collection chamber (901), a heavy liquid phase collection chamber (902) and a light liquid phase collection chamber (903). The solid phase collection chamber (901) is located below the solid phase slag discharge port (503), the heavy liquid phase collection chamber (902) is located below the heavy liquid flow channel outlet, and the light liquid phase collection chamber (903) is located outside the outlet of the connecting sleeve (803).

8. A three-phase horizontal screw centrifuge according to claim 1, characterized in that: The outlet end of the central feed assembly (7) extends into the feed hopper (602) inside the hollow main shaft (601).

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