Horizontal screw centrifugal separation structure and horizontal screw centrifuge

Abstract

The utility model discloses a horizontal spiral centrifugal separation structure and horizontal spiral centrifuge. The horizontal spiral centrifugal separation structure includes the casing, the drum, spiral push material structure and the feed pipe, the casing inside has liquid phase material collecting chamber and solid phase material collecting chamber, the first end of drum is provided with liquid phase material discharge port, and the second end is provided with solid phase material discharge port, liquid phase material discharge port with liquid phase material collecting chamber intercommunication, solid phase material discharge port with solid phase material collecting chamber intercommunication, and with, still fixedly arranged with first scraper group and second scraper group on the casing, first scraper group with the second end of drum's end face corresponds, second scraper group with the side of second end of drum corresponds. The horizontal spiral centrifugal separation structure provided by the utility model pushes material smoothly, and the problem of frequent plugging and stoppage of centrifuge is solved.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal equipment technology, specifically to a horizontal spiral centrifugal separation structure and a horizontal spiral centrifuge. Background Technology

[0002] Centrifuges are widely used in chemical, petroleum, food, pharmaceutical, mineral processing, coal, and water treatment industries, utilizing centrifugal force to accelerate the separation of different materials. However, existing centrifuges (see...) Figure 1 As shown, the following problems exist in its application: the production capacity is not up to standard (less than 12.5 tons / hour), frequent flushing, serious material blockage, once the load is increased, the torque will increase sharply, causing the centrifuge to stop abnormally, the feed pipe will break frequently, and it cannot operate stably. Utility Model Content

[0003] The main purpose of this utility model is to provide a horizontal spiral centrifugal separation structure and a horizontal spiral centrifuge to overcome the shortcomings of the prior art.

[0004] To achieve the aforementioned objectives, the technical solution adopted by this utility model includes:

[0005] The first aspect of this utility model provides a horizontal spiral centrifugal separator structure, which includes a casing, a drum, a spiral pusher structure, and a feed pipe. The casing has a liquid phase collection chamber and a solid phase collection chamber inside. The drum is rotatably coupled to the casing and can rotate around its own axis. The drum has a separation chamber inside. The spiral pusher structure is disposed in the separation chamber and is rotatably coupled to the drum and can rotate around its own axis. A liquid phase material outlet is provided at the first end of the drum, and a solid phase material outlet is provided at the second end. The liquid phase material outlet is connected to the liquid phase collection chamber, and the solid phase material outlet is connected to the solid phase collection chamber. The feed pipe is used to convey a mixture of solid and liquid phase materials into the separation chamber.

[0006] Furthermore, a first scraper group and a second scraper group are fixedly installed on the housing. The first scraper group corresponds to the end face of the second end of the drum, and the second scraper group corresponds to the side face of the second end of the drum.

[0007] A second aspect of this utility model provides a horizontal spiral centrifuge, which includes the aforementioned horizontal spiral centrifugal separation structure and a drive mechanism. The drive mechanism is in transmission cooperation with the drum and the spiral pusher structure, and is used to drive the drum and the spiral pusher structure to rotate in the same direction at different speeds.

[0008] Compared with the prior art, this utility model has at least the following advantages:

[0009] 1) By removing the screen basket structure, the solid material in the drum is directly discharged from the feed port through the solid material discharge port. The first scraper group and the second scraper group are set to continuously remove the material that sticks to the end face and side of the drum, so that the material moves smoothly, thereby reducing the discharge resistance of the centrifuge and effectively preventing the material from accumulating and blocking the feed port.

[0010] 2) This utility model provides a guide groove on the inner wall of the drum, which allows the material on the inner wall of the drum to move smoothly along the guide groove and prevents material blockage.

[0011] 3) This utility model increases the residence time of materials in the settling zone by setting the feed inlet in the straight section of the drum, thus effectively solving the problem of frequent breakage of the feed pipe due to material blockage. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of a centrifuge in the prior art;

[0014] Figure 2 This is a schematic diagram of the structure of a horizontal spiral centrifuge provided in a typical embodiment of this utility model.

[0015] Attached reference numerals: 101. Conical section; 102. Spiral pusher structure; 103. Feed pipe; 104. First end; 105. Screw scraper at the screen basket end; 106. Straight section; 107. Large end support structure; 108. Small end support structure; 109. Discharge port; 110. Concentrated mother liquor outlet; 111. Clear mother liquor outlet; 112. Machine casing partition; 113. Differential; 114. Differential oil inlet; 115. Differential oil return port; 116. Flushing water inlet; 117. Screen basket;

[0016] 201. Conical section; 202. Spiral pusher structure; 203. Feed pipe; 204. Adjustment structure; 205. First scraper group; 206. Second scraper group; 207. Straight section; 208. First support structure; 209. Second support structure; 210. Discharge port; 211. Machine housing partition; 212. Differential; 213. Mother liquor outlet; 214. Differential oil inlet plug; 215. Differential oil return plug; 216. Flushing structure. Detailed Implementation

[0017] In view of the shortcomings of the prior art, the applicant, through long-term research and extensive practice, has come up with the technical solution of this utility model. The following will further explain the technical solution, its implementation process, and its principles.

[0018] The first aspect of this utility model provides a horizontal spiral centrifugal separator structure, which includes a casing, a drum, a spiral pusher structure, and a feed pipe. The casing has a liquid phase collection chamber and a solid phase collection chamber inside. The drum is rotatably coupled to the casing and can rotate around its own axis. The drum has a separation chamber inside. The spiral pusher structure is disposed in the separation chamber and is rotatably coupled to the drum and can rotate around its own axis. A liquid phase material outlet is provided at the first end of the drum, and a solid phase material outlet is provided at the second end. The liquid phase material outlet is connected to the liquid phase collection chamber, and the solid phase material outlet is connected to the solid phase collection chamber. The feed pipe is used to convey a mixture of solid and liquid phase materials into the separation chamber.

[0019] Furthermore, a first scraper group and a second scraper group are fixedly installed on the housing. The first scraper group corresponds to the end face of the second end of the drum, and the second scraper group corresponds to the side face of the second end of the drum.

[0020] In some embodiments, the drum includes a straight cylindrical section and a conical cylindrical section arranged sequentially along its own axis, the first end of the drum being the end of the straight cylindrical section away from the conical cylindrical section, and the second end of the drum being the end of the conical cylindrical section away from the straight cylindrical section in some preferred embodiments.

[0021] The liquid material outlet is located on the end face of the straight section, and the solid material outlet is located on the end face and side face of the conical section.

[0022] In some implementations, the rotating drum coincides with the central axis of the spiral feeding structure.

[0023] In some implementations, the feed tube coincides with the central axis of the screw feeder.

[0024] In some implementations, the spiral blades of the spiral pusher structure are three-headed spiral blades.

[0025] In some embodiments, a guide groove is provided on the inner wall of the separation chamber, and the guide groove extends along the axial direction of the drum.

[0026] In some embodiments, the spiral feeding structure is provided with a feed inlet, and a baffle plate is also fixedly provided on the spiral feeding structure. The baffle plate has no direct contact with the inner wall of the separation chamber, and the baffle plate is located between the feed inlet and the second end of the drum; the feed inlet is connected to the feed pipe.

[0027] In some preferred embodiments, the feed inlet is located in the chamber formed by the straight section of the drum, and the baffle plate is located between the straight section and the conical section.

[0028] In some implementations, the horizontal spiral centrifugal separator is provided with a flushing inlet for water to be introduced, the flushing inlet is connected to a flushing outlet, the flushing outlet is connected to a solid phase collection chamber, the solid phase collection chamber is provided with a discharge port, the discharge port simultaneously discharges solid phase material and cleaning liquid.

[0029] In some embodiments, the horizontal spiral centrifugal separation structure further includes a first support structure and a second support structure, wherein the first end of the drum is connected to the housing through the first support structure, and the second end of the drum is connected to the housing through the second support structure.

[0030] In some implementations, the horizontal spiral centrifugal separation structure further includes an adjustment structure disposed at the second end of the drum, the adjustment structure corresponding to the liquid material discharge port, and used to adjust the effective working area of ​​the liquid material discharge port.

[0031] In some preferred embodiments, the adjusting structure includes an overflow plate with an overflow port. The overflow port is provided with a baffle, which is movably connected to the overflow plate. The baffle can block the overflow port, thereby changing the working area of ​​the overflow port. The working area of ​​the overflow port is the effective working area of ​​the liquid phase material discharge port.

[0032] In some implementations, the housing is provided with a vent that penetrates the housing.

[0033] In some preferred embodiments, the vent is located at the top of the housing.

[0034] A second aspect of this utility model provides a horizontal spiral centrifuge, which includes the aforementioned horizontal spiral centrifugal separation structure and a drive mechanism. The drive mechanism is in transmission cooperation with the drum and the spiral pusher structure, and is used to drive the drum and the spiral pusher structure to rotate in the same direction at different speeds.

[0035] In some implementations, the drive mechanism includes a drive motor and a differential, wherein the drive motor is connected to the drum and the spiral pusher structure via the differential.

[0036] The following will provide a further explanation of the technical solution, its implementation process, and its principles, in conjunction with the accompanying drawings and specific implementation examples.

[0037] Please see Figure 1 This is a schematic diagram of the structure of a centrifuge in the prior art, including a frame, a drive mechanism and a centrifugation mechanism, which are mounted on the frame.

[0038] The centrifugal mechanism includes a casing, a rotating drum rotatably connected to a frame within the casing, and a spiral pusher structure 102 rotatably connected to the frame within the rotating drum. A drive mechanism drives the rotating drum and the spiral pusher structure 102 to rotate. The rotating drum and the spiral pusher structure are connected to the frame via a large-end support structure 107 and a small-end support structure 108, respectively. The large-end support structure supports the spiral and the rotating drum, while the small-end support structure supports the end of the screen basket. The spiral pusher structure 102 is provided with a feed inlet, which is connected to a feed pipe 103.

[0039] The casing is provided with a concentrated mother liquor outlet 110, a clear mother liquor outlet 111, and a feed inlet 109. The drum includes a straight cylindrical section 106 and a conical section 101 connected in sequence. The drum has a first end 104 and a second end. A sieve basket 117 is connected to the second end. The sieve basket 117 communicates with the clear mother liquor outlet 111 and the feed inlet 109. The first end 104 communicates with the concentrated mother liquor outlet 110. The casing is also provided with a casing partition 112.

[0040] The solid-liquid mixture is fed into the spiral conveyor structure through the feed pipe. The material enters the space between the drum and the spiral conveyor structure through the feed inlet. The conical section, working in conjunction with the spiral conveyor structure, provides traction for the material. The spiral conveyor structure propels the material towards the screen basket end via a spiral, while the feed pipe guides the material into the spiral. The straight section, also working in conjunction with the spiral conveyor structure, ensures the material effectively passes through the spiral, achieving solid-liquid separation. The liquid phase material is conveyed to the first end of the drum, where the concentrated mother liquor outlet discharges and recovers the material with high solid content for a second centrifugation. The solid phase material is conveyed to the second end of the drum and enters the screen basket. The discharge port discharges the material, and the clear mother liquor outlet discharges the clear mother liquor filtered from the screen basket. A baffle plate on the casing separates the mother liquor and the material, allowing them to be discharged separately.

[0041] The screen basket 117 is equipped with a screen basket end scraper 105. The screen basket end scraper 105 prevents material from sticking to the discharge end.

[0042] The drive mechanism includes a differential 113, which is provided with a differential oil inlet 114 and a differential oil return port 115. The differential sets a certain speed ratio between the drum and the screw feeder to separate the material and moisture. The differential oil inlet is the lubricating oil inlet, and the differential oil return port allows the lubricating oil to circulate back into the oil tank.

[0043] The casing is also equipped with a rinsing water inlet 116. Water is supplied through the rinsing water inlet 116 to rinse the material adhering to the screen basket.

[0044] Example

[0045] Please see Figure 2 This embodiment provides a highly efficient and stable horizontal spiral centrifuge, including a horizontal spiral centrifugal separation structure and a drive mechanism.

[0046] In this embodiment, the horizontal spiral centrifugal separator includes a casing, a drum, a spiral feeding structure 202, and a feed pipe. The casing has a liquid phase collection chamber and a solid phase collection chamber. The drum rotates with the casing and can rotate around its own axis. The drum includes a straight cylindrical section 207 and a conical section 201 arranged sequentially along its own axis. The first end of the drum is the end of the straight cylindrical section 202 away from the conical section 201, and the second end of the drum is the end of the conical section 201 away from the straight cylindrical section 207. The liquid phase material outlet is located on the end face of the straight cylindrical section 207, and the solid phase material outlet is located on the end face and side face of the conical section 201.

[0047] In this embodiment, the drum has a separation chamber inside, and a guide groove is provided on the inner wall of the separation chamber, extending along the axial direction of the drum. The guide groove extends from the first end to the second end of the drum. The depth of the guide groove is 1.5mm. The guide bar of the drum is replaced with a guide groove. In the prior art, the structure of the guide bar makes the gap between the material and the drum too large (the thickness of the guide bar and the gap between the guide bar), making the material layer between the drum and the screw too thick, resulting in high pushing resistance, making it difficult for the material to be pushed out, and easily producing plasticized flakes. Replacing it with a guide groove can overcome the disadvantages of the guide bar.

[0048] In this embodiment, the spiral pusher structure 202 is disposed in the separation chamber. The spiral pusher structure 202 rotates in conjunction with the rotating drum and can rotate around its own axis. The central axis of the rotating drum coincides with that of the spiral pusher structure 202. The spiral blades of the spiral pusher structure 202 are three-head spiral blades. When the number of spiral heads is doubled, the slag conveying efficiency of the spiral is doubled accordingly. However, as the number of spiral heads increases, the disturbance of the fluid in the settling zone by the spiral blades inside the machine will increase, thereby increasing the solid content in the separated liquid. Therefore, a three-head spiral is more effective.

[0049] In this embodiment, a liquid material outlet is provided at the first end of the drum, and a solid material outlet is provided at the second end. The liquid material outlet is connected to the liquid collection chamber, and the solid material outlet is connected to the solid collection chamber. The feed pipe is used to transport the mixture of solid and liquid phase materials into the separation chamber. The feed pipe 203 coincides with the central axis of the screw feeder 202. The liquid collection chamber is provided with a mother liquor outlet 213, which is used to discharge liquid phase materials.

[0050] This invention eliminates the centrifugal filter screen (sieve basket) at the discharge end of existing centrifuge models, preventing some powder from adhering to the screen wall during production and hindering smooth material discharge. The discharge port and the original filtration section's liquid outlet are combined into one discharge port, preventing discharge obstruction. After the modification, the number of mother liquor discharge ports is reduced from two to one, meeting technical quality requirements.

[0051] In this embodiment, the straight section of the drum is the settling zone, and the conical section is the drying zone. Lengthening the straight section will increase the residence time of the material in the settling zone, which will reduce the content of solid particles in the filtrate. Similarly, lengthening the conical section will increase the residence time of the material in the drying zone, which will reduce the moisture content of the filter cake and improve the dehydration effect.

[0052] In this embodiment, a first scraper assembly 205 and a second scraper assembly 206 are fixedly installed on the casing. The first scraper assembly 205 corresponds to the end face of the second end of the drum, and the second scraper assembly 206 corresponds to the side face of the second end of the drum. The first scraper assembly continuously and effectively removes the material adhering to the end face of the second end, ensuring smooth material flow. The second scraper assembly removes the material adhering to the side face of the second end, reducing the centrifuge's discharge resistance and preventing material accumulation and blockage at the discharge port.

[0053] In this embodiment, the spiral feeding structure 202 is provided with a feed inlet located in the chamber formed by the straight cylindrical section 207 of the rotating drum, and the feed inlet is connected to the feed pipe 203. Furthermore, a baffle plate is fixedly installed on the spiral feeding structure 202. The baffle plate has no direct contact with the inner wall of the separation chamber and is located between the straight cylindrical section 207 and the conical section 201. This embodiment places the feed inlet in the straight cylindrical section of the rotating drum, increasing the residence time of the material in the settling zone and effectively solving the problem of frequent feed pipe breakage due to material blockage.

[0054] In this embodiment, the horizontal spiral centrifugal separator is equipped with a flushing inlet 216 for introducing water. The flushing inlet 216 is connected to a flushing outlet, which is connected to the solid phase collection chamber. The solid phase collection chamber is equipped with a discharge port 210, which simultaneously discharges solid materials and cleaning liquid. The casing is equipped with a casing partition 211 to separate the solid phase collection chamber from the liquid phase collection chamber. Flushing water is introduced through the flushing inlet to flush the inside of the centrifuge. Alternatively, the flushing inlet can be omitted. After the centrifuge is modified, the screen basket can be removed, and flushing is not required; only the feed pipe needs to be flushed. This not only reduces energy consumption but also reduces the labor required for the job.

[0055] In this embodiment, the horizontal spiral centrifugal separation structure further includes a first support structure 208 and a second support structure 209. The first end of the drum is connected to the housing through the first support structure 208, and the second end of the drum is connected to the housing through the second support structure 209.

[0056] In this embodiment, the horizontal spiral centrifugal separator further includes an adjustment structure. The adjustment structure is located at the second end of the drum and corresponds to the liquid material discharge port. It is used to adjust the effective working area of ​​the liquid material discharge port. The adjustment structure includes an overflow plate 204 with an overflow port. A baffle is provided on the overflow port and is movably connected to the overflow plate 204. The baffle can slide up and down along the overflow port, thereby blocking the overflow port and changing its working area. The working area of ​​the overflow port is the effective working area of ​​the liquid material discharge port.

[0057] The mother liquor discharge rate can be adjusted by sliding the overflow plate. By reasonably adjusting the position of the overflow plate, an appropriate liquid tank depth can be selected, ensuring effective slag removal while minimizing the moisture content of the filter cake. This allows the liquid tank depth to be adjusted within a reasonable range, achieving the desired separation effect. Different moisture contents can be obtained by adjusting the overflow plate; the filter cake moisture content meets the national standard requirement of ≤25%, and the mother liquor clarity meets the national standard requirement of ≤200ppm.

[0058] In this embodiment, a vent is provided at the top of the casing to connect the air inside and outside the casing, ensuring smooth liquid discharge and material discharge. Vents can be provided in both the solid phase collection chamber and the liquid phase collection chamber of the casing.

[0059] In this embodiment, the drive mechanism is in transmission cooperation with the drum and the screw conveyor structure, and is used to drive the drum and the screw conveyor structure to rotate in the same direction at different speeds. The drive mechanism includes a drive motor and a differential 212. The drive motor is in transmission cooperation with the drum and the screw conveyor structure 202 via the differential 212. The differential sets a certain speed ratio between the drum and the screw conveyor structure to separate the material and moisture. The planetary gears and planetary shafts of the differential are engaged by a steel-to-steel sliding friction pair of double-row short cylindrical roller bearings. This hard-on sliding bearing friction pair usually requires lubricating oil. However, the lubricating oil of the centrifuge differential in the prior art is the same as the lubricating oil of the main bearing, and it is a circulating oil lubrication method. This results in a small amount of oil inside the differential, which easily leads to insufficient lubrication of the bearings, resulting in a short service life and abnormal damage to the differential.

[0060] In this embodiment, a differential oil inlet plug 214 and a differential oil return plug 215 are provided on the differential 212 to achieve long-term closed storage of lubricating oil inside the differential, improve the operational stability of the differential, and avoid damage caused by insufficient bearing lubrication.

[0061] In this embodiment, the liquid phase collection chamber and the solid phase collection chamber are isolated. Existing centrifuges have a screen basket at the discharge end. However, the filter cake water in the screen basket enters the drying bed, affecting the product moisture content and the stable operation of downstream equipment. This embodiment solves the problem of filter cake water entering the drying bed, ensuring the product moisture content and the normal operation of downstream equipment.

[0062] The parameters of the horizontal spiral centrifuge of this embodiment are compared with those of existing centrifuges, as shown in Table 1.

[0063] Table 1:

[0064]

[0065]

[0066] Compared with existing centrifuges through actual testing, the horizontal screw centrifuge provided in this embodiment effectively solves the following problems:

[0067] 1) This invention solves the problem of low centrifuge capacity. Existing centrifuges have a capacity of less than 12.5 tons / hour, while the centrifuge provided by this invention can reach 15 tons / hour.

[0068] 2) This invention solves the problems of frequent material blockage and stoppage, clutch tripping, inability to rotate the centrifuge, and damage to some parts. The centrifuge provided by this invention can operate at full load without stopping and push material smoothly.

[0069] 3) This invention solves the problem of high centrifuge torque. Existing centrifuges have a torque of 880 Nm / s, requiring frequent stops for feeding and rinsing. The centrifuge provided by this invention has a full-load torque of 600 Nm / s, which ensures that the torque value is within a reasonable range and no longer fluctuates significantly, resulting in stable centrifuge operation.

[0070] 4) This invention solves the problem of high vibration value in centrifuges. Existing centrifuges have a vibration value of 12 mm / s, which causes frequent shutdowns, requires frequent stops of feeding and rinsing, and disassembly to clean the internal screen of accumulated material. The centrifuge provided by this invention has a full-load vibration value of <7.5 mm, and the centrifuge runs smoothly.

[0071] 5) This invention solves the problem of high differential temperature (close to 90℃) in centrifuges, which leads to short service life and frequent abnormal damage caused by insufficient bearing lubrication, requiring long-term outsourced maintenance. The centrifuge provided by this invention has a differential temperature of <70℃ under full load operation, normal lubrication, and stable operation.

[0072] 6) This invention solves the problem of frequent breakage of the centrifuge feed pipe due to material blockage. The centrifuge provided by this invention has no breakage or cracking of the feed pipe when operating at full load, thus reducing the cost of spare parts procurement.

[0073] 7) It solves the problems of frequent material blockage and shutdown of centrifuges, requiring opening the cover for cleaning and frequent shutdown for flushing. Following the standard operating procedure, flushing once at startup and once at shutdown is sufficient to meet the equipment requirements, reducing the failure rate and the labor intensity of operators.

[0074] Although the present invention has been described with reference to illustrative embodiments, those skilled in the art will understand that various other changes, omissions, and / or additions may be made without departing from the spirit and scope of the present invention, and that elements of the described embodiments may be substituted with substantially equivalents. Furthermore, many modifications may be made without departing from the scope of the present invention to adapt particular situations or materials to the teachings of the present invention. Therefore, the present invention is not intended to be limited to the specific embodiments disclosed for carrying out the present invention, but rather is intended to include all embodiments falling within the scope of the appended claims. Moreover, unless specifically stated otherwise, any use of the terms first, second, etc., does not indicate any order or importance, but is used to distinguish one element from another.

[0075] It should be understood that the above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A horizontal spiral centrifugal separation structure, characterized in that, include: The machine comprises a casing, a rotating drum, a spiral feeding structure, and a feed pipe. The casing has a liquid phase collection chamber and a solid phase collection chamber. The rotating drum is rotatably fitted with the casing and can rotate around its own axis. The rotating drum has a separation chamber. The spiral feeding structure is disposed in the separation chamber and is rotatably fitted with the rotating drum and can rotate around its own axis. A liquid phase material outlet is provided at the first end of the rotating drum, and a solid phase material outlet is provided at the second end. The liquid phase material outlet is connected to the liquid phase collection chamber, and the solid phase material outlet is connected to the solid phase collection chamber. The feed pipe is used to convey a mixture of solid and liquid phase materials into the separation chamber. Furthermore, a first scraper group and a second scraper group are fixedly installed on the housing. The first scraper group corresponds to the end face of the second end of the drum, and the second scraper group corresponds to the side face of the second end of the drum.

2. The horizontal spiral centrifugal separation structure according to claim 1, characterized in that, The drum includes a straight cylindrical section and a conical cylindrical section arranged sequentially along its own axis. The first end of the drum is the end of the straight cylindrical section away from the conical cylindrical section, and the second end of the drum is the end of the conical cylindrical section away from the straight cylindrical section.

3. The horizontal spiral centrifugal separation structure according to claim 2, characterized in that, The liquid material outlet is located on the end face of the straight section, and the solid material outlet is located on the end face and side face of the conical section.

4. The horizontal spiral centrifugal separation structure according to claim 1, characterized in that, The central axis of the rotating drum coincides with that of the spiral feeding structure; And / or, the feed pipe coincides with the central axis of the spiral pusher structure; And / or, the spiral blades of the spiral pusher structure are three-headed spiral blades.

5. The horizontal spiral centrifugal separation structure according to claim 1, characterized in that, A guide groove is provided on the inner wall of the separation chamber, and the guide groove extends along the axial direction of the drum.

6. The horizontal spiral centrifugal separation structure according to claim 2, characterized in that, The spiral feeding structure is provided with a feed inlet, and a baffle plate is also fixedly provided on the spiral feeding structure. The baffle plate has no direct contact with the inner wall of the separation chamber, and the baffle plate is located between the feed inlet and the second end of the drum. The feed inlet is connected to the feed pipe.

7. The horizontal spiral centrifugal separation structure according to claim 6, characterized in that, The feed inlet is located in the cavity formed by the straight section of the drum, and the baffle plate is located between the straight section and the conical section.

8. The horizontal spiral centrifugal separation structure according to claim 1, characterized in that, The horizontal spiral centrifugal separation structure is provided with a flushing inlet for water to be introduced. The flushing inlet is connected to a flushing outlet, which is connected to a solid phase collection chamber. The solid phase collection chamber is provided with a discharge port, which simultaneously discharges solid phase material and cleaning liquid. And / or, the horizontal spiral centrifugal separation structure further includes a first support structure and a second support structure, the first end of the drum is connected to the housing through the first support structure, and the second end of the drum is connected to the housing through the second support structure.

9. The horizontal spiral centrifugal separation structure according to claim 1, characterized in that, It also includes an adjustment structure, which is located at the second end of the drum and corresponds to the liquid material discharge port, and is used to adjust the effective working area of ​​the liquid material discharge port.

10. The horizontal spiral centrifugal separation structure according to claim 9, characterized in that, The adjustment structure includes an overflow plate with an overflow port. The overflow port is equipped with a baffle, which is movably connected to the overflow plate. The baffle can block the overflow port, thereby changing the working area of ​​the overflow port. The working area of ​​the overflow port is the effective working area of ​​the liquid phase material discharge port.

11. The horizontal spiral centrifugal separation structure according to claim 1, characterized in that, The housing is provided with a vent that penetrates the housing.

12. The horizontal spiral centrifugal separation structure according to claim 11, characterized in that, The vent is located at the top of the housing.

13. A horizontal screw centrifuge, characterized in that, The invention includes the horizontal spiral centrifugal separation structure and drive mechanism as described in any one of claims 1-12, wherein the drive mechanism is in transmission cooperation with the drum and the spiral pusher structure, and is used to drive the drum and the spiral pusher structure to rotate in the same direction at different speeds.

14. The horizontal screw centrifuge according to claim 13, characterized in that, The drive mechanism includes a drive motor and a differential, and the drive motor is connected to the drum and the spiral pusher structure via the differential.

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