A flow guiding device for a horizontal spiral centrifuge and a centrifuge.

Abstract

This invention provides a horizontal screw centrifuge with a flow guiding device and a centrifuge, belonging to the technical field of separation equipment for materials containing solid and liquid phases such as soil and slurry. It enables the separated solid and liquid phases of soil and other materials to meet recycling or discharge requirements. It includes a feed pipe, a transition section, and a discharge section. The feed inlet of the feed pipe is on the same side as the solid phase discharge outlet, and its discharge outlet extends into the discharge section. The end near the solid phase discharge outlet is the small end of the screw pusher, and the end away from the solid phase discharge outlet is the large end of the screw pusher. The transition section is a conical structure that gradually increases in size from the small end to the large end. The flow guiding channel directs the material inside the conical transition section to the position near the large end of the screw pusher for separation. After thorough separation, the solid phase meets the discharge requirements, greatly improving the separation effect and avoiding the need for secondary treatment due to substandard solid phase discharge. The discharge is smooth, improving energy consumption and work efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of equipment for separating solid and liquid phase materials such as soil and mud, specifically to a flow guiding device and centrifuge for a horizontal spiral centrifuge. Background Technology

[0002] Horizontal screw centrifuges primarily achieve solid-liquid separation of materials such as soil and slurry by using a rotational speed to generate centrifugal force. Horizontal screw centrifuges separate extremely fine particles that are difficult to separate. Under centrifugal force hundreds or even thousands of times greater than gravity, an annular liquid pool forms inside the drum. Due to the density difference between the solid and liquid phases, the heavier solid particles settle to the inner wall of the drum. Under the relative motion of the screw blades and the drum, the solid particles are pushed by the screw pusher to the smaller end of the drum and discharged from the solid phase outlet. The clarified liquid phase in the inner ring is discharged through the spiral channel via the liquid phase outlet, thus achieving a continuous solid-liquid separation process.

[0003] As is well known, the discharge port of the centrifuge feed pipe extends directly into the discharge cylinder section of the screw pusher, and then the material is discharged through the discharge port on the shell of the discharge cylinder section for solid-liquid separation. During the feeding process of the centrifuge feed pipe, if the feed rate is too large and the discharge is not timely, the material will surge from the discharge cylinder section to the cylindrical transition cylinder section. In order to ensure that no material remains inside the transition cylinder section, holes are generally made in the shell of the transition cylinder section to throw the material into the screw pusher and the rotating drum, thus preventing the material from remaining in the transition cylinder section.

[0004] When the feed inlet and solid discharge outlet are on the same side of the feed pipe, the transition cylinder section is located at the solid discharge outlet. The discharged material directly combines with a large amount of solid, which easily leads to high solid moisture content. In addition to material waste, the discharged solid is often substandard and requires secondary treatment, which undoubtedly increases operating costs and cannot achieve the maximum processing capacity. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a flow guiding device for a horizontal screw centrifuge. This device guides the material inside the conical transition cylinder section to a position near the large end of the screw pusher for separation through a flow guiding channel. After the material is fully separated, the solid phase meets the discharge standard and is discharged, which greatly improves the separation effect of the material, increases the material throughput, and avoids the phenomenon of secondary treatment required due to the discharge of unqualified solid phase. The structure is simple, the discharge is smooth, and the energy efficiency and work efficiency are improved.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a flow guiding device for a horizontal screw centrifuge, comprising a feed pipe, a transition section, and a discharge section. The feed inlet of the feed pipe is on the same side as the solid phase discharge outlet, and its discharge outlet extends into the interior of the discharge section. The end near the solid phase discharge outlet is the small end of the screw pusher, and the end away from the solid phase discharge outlet is the large end of the screw pusher. The transition section is a conical structure that increases in size from the small end to the large end, and it guides the material to a position near the large end of the screw pusher for separation through a flow guiding channel.

[0007] As an improvement of the present invention, the shell of the transition cylinder section is provided with a discharge port Ⅲ, and a flow guide channel Ⅰ is provided on the outside of the shell. The discharge port Ⅳ of the flow guide channel Ⅰ is located on the outside of the shell at the discharge cylinder section end away from the transition cylinder section. The material inside the transition cylinder section is discharged sequentially through the discharge port Ⅲ, the flow guide channel Ⅰ and the discharge port Ⅳ.

[0008] As an improvement of the present invention, the number of the flow guiding channels I is at least two, and they are evenly distributed along the circumferential direction;

[0009] The discharge cylinder section has a discharge port I on its shell, and the flow guiding channel I is distributed at intervals with the discharge port I.

[0010] As an improvement of the present invention, a partition I is provided between the transition cylinder section and the discharge cylinder section, and a guide hole I is provided on the partition I. The discharge cylinder section has a guide channel II that is isolated from the discharge channel inside the shell, and a discharge port II is provided on the shell of the discharge cylinder section. The discharge port II is located on the shell of the discharge cylinder section at one end away from the transition cylinder section. The material inside the transition cylinder section is discharged sequentially through the guide hole I, the guide channel II and the discharge port II.

[0011] As an improvement of the present invention, the number of the flow guiding channels II is at least two, and they are evenly distributed along the circumferential direction;

[0012] The discharge cylinder section has a discharge port I on its shell, and the flow guiding channel II is distributed at intervals with the discharge port I.

[0013] As an improvement of the present invention, it also includes a guide tube section disposed at the large end of the spiral pusher, wherein a partition I is provided between the transition tube section and the discharge tube section, and a partition II is provided between the discharge tube section and the guide tube section;

[0014] The partition I is provided with a flow guide hole I, and the inside of the discharge cylinder section is provided with a flow guide channel II that is isolated from the discharge channel;

[0015] The partition plate II is provided with a flow guide hole II, and the shell at one end of the flow guide section near the discharge cylinder section is provided with a discharge port V;

[0016] The material inside the transition cylinder section is discharged sequentially through guide hole I, guide channel II, guide hole II, guide cylinder section and discharge port V.

[0017] As an improvement of the present invention, the number of the flow guiding channels II is at least two, and they are evenly distributed along the circumferential direction;

[0018] The discharge cylinder section has a discharge port I on its shell, and the flow guiding channel II is distributed at intervals with the discharge port I.

[0019] As an improvement of the present invention, a flow guiding channel III is provided between the flow guiding hole II and the discharge port V, and the material inside the transition cylinder section is discharged sequentially through the flow guiding hole I, the flow guiding channel II, the flow guiding channel III and the discharge port V.

[0020] As an improvement of the present invention, the discharge cylinder section is provided with a conical buffer element corresponding to the position of the discharge port of the feed pipe.

[0021] Another object of the present invention is to provide a centrifuge comprising the above-described horizontal spiral centrifuge flow guiding device.

[0022] The beneficial effects of this invention are as follows: A horizontal screw centrifuge flow guiding device guides the material inside the conical transition section to a position near the large end of the screw pusher for separation via a flow guiding channel. The large end of the screw pusher has a large centrifugal force, which can greatly improve the material separation effect, increase the material throughput, and ensure that the solid phase meets the discharge standards, avoiding the phenomenon of secondary treatment required for unqualified discharged solid phases. This saves operating costs and improves energy efficiency and work efficiency. In addition, by designing the transition section as a conical structure that increases in size from the small end to the large end, compared with the existing cylindrical structure, all the material inside the transition section can be discharged, avoiding accumulation and ensuring smooth discharge. In summary, the processing of this invention enables the solid and liquid phases of separated materials such as soil to meet the requirements for recycling or discharge. The structure is simple and environmentally friendly.

[0023] Furthermore, the transition cylinder section has a discharge port III on its shell, and a guide channel I is provided on the outside of the shell. The discharge port IV of the guide channel I is located on the outside of the shell at the discharge cylinder section end away from the transition cylinder section. The material inside the transition cylinder section is discharged sequentially through the discharge port III, the guide channel I, and the discharge port IV. This design results in a simple structure, convenient manufacturing, and low cost.

[0024] Furthermore, the number of the guide channels I is at least two, and they are evenly distributed along the circumference; the discharge cylinder section has a discharge port I on its shell, and the guide channels I and the discharge port I are distributed at intervals. Through the above design, in addition to avoiding interference between the guide channels I and the discharge port I, the entire spiral pusher operates more smoothly, further improving the separation effect.

[0025] Furthermore, a partition I is provided between the transition cylinder section and the discharge cylinder section, and a guide hole I is provided on the partition I. The discharge cylinder section has a guide channel II inside its shell, which is isolated from the discharge channel. The discharge cylinder section has a discharge port II on its shell, which is located on the end of the discharge cylinder section away from the transition cylinder section. The material inside the transition cylinder section is discharged sequentially through the guide hole I, the guide channel II, and the discharge port II. Through the above design, the entire structure becomes more compact.

[0026] Furthermore, the number of the guide channels II is at least two, and they are evenly distributed along the circumference; the discharge cylinder section has a discharge port I on its shell, and the guide channels II and the discharge port I are distributed at intervals. Through the above design, in addition to avoiding interference between the guide channels II and the discharge port I, the entire screw pusher operates more smoothly, further improving the separation effect.

[0027] Furthermore, it also includes a guide tube section located at the large end of the screw pusher. A partition I is provided between the transition tube section and the discharge tube section, and a partition II is provided between the discharge tube section and the guide tube section. A guide hole I is provided on the partition I, and a guide channel II, isolated from the discharge channel, is provided inside the shell of the discharge tube section. A guide hole II is provided on the partition II, and a discharge port V is provided on the shell of the guide tube section near the discharge tube section. The material inside the transition tube section is discharged sequentially through the guide hole I, the guide channel II, the guide hole II, the guide tube section, and the discharge port V. Through this design, the centrifugal force of the material discharged through the discharge port V is further enhanced, improving the separation effect. The structure is simple, easy to manufacture, and low in cost.

[0028] Furthermore, a flow guiding channel III is provided between the flow guiding hole II and the discharge port V. The material inside the transition cylinder section is discharged sequentially through the flow guiding hole I, the flow guiding channel II, the flow guiding hole II, the flow guiding channel III, and the discharge port V. Through the above design, the phenomenon of a large amount of material accumulating inside the flow guiding cylinder section can be avoided. The structure is simple, easy to manufacture, and inexpensive.

[0029] Furthermore, the discharge cylinder section is equipped with a conical buffer corresponding to the discharge port of the feed pipe. The conical buffer effectively buffers the impact of the material from the feed pipe on the baffle II, and also guides the material flow, further improving operational efficiency.

[0030] The present invention also provides a centrifuge, which includes the above-described horizontal spiral centrifuge flow guiding device. Therefore, it has corresponding beneficial effects, as detailed in the preceding description, which will not be repeated here. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of an existing centrifuge.

[0032] Figure 2 This is a schematic diagram of the internal structure of Embodiment 1 of the present invention;

[0033] Figure 3 This is a schematic diagram of the external structure of Embodiment 1 of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0035] Figure 5 for Figure 4 Cross-sectional view;

[0036] Figure 6 This is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0037] Figure 7 This is a schematic diagram of the structure of Embodiment 4 of the present invention;

[0038] Figure 8 This is a structural schematic diagram of Embodiment 5 of the present invention.

[0039] In the diagram: 1. Feed pipe; 2. Solid phase outlet; 3. Screw pusher; 4. Rotary drum; 5. Liquid phase outlet; 6. Motor; 7. Frame; 8. Discharge cylinder section; 81. Discharge port I; 82. Discharge port II; 83. Discharge channel; 9. Transition cylinder section; 91. Discharge port III; 10. Guide channel I; 101. Discharge port IV; 11. Guide channel II; 12. Baffle I; 121. Guide hole I; 13. Guide cylinder section; 131. Discharge port V; 14. Baffle II; 141. Guide hole II; 15. Guide channel III; 16. Conical buffer. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0041] It should be noted that the terms "internal," "external," "small end," "large end," "left," and "right" used in the embodiments of this invention are only relative concepts or are based on the normal use of the product, and should not be considered as restrictive.

[0042] like Figure 1 As shown, the existing centrifuge includes a screw pusher 3, a rotating drum 4, and a motor 6, and the centrifuge is fixedly mounted on a bracket 7. It utilizes the speed difference between the screw pusher 3 and the rotating drum 4 to achieve the following: the solid phase is pushed by the screw pusher 3 to the small end of the rotating drum 4 and discharged from the solid phase outlet 2, while the clarified liquid phase is discharged through the spiral channel through the liquid phase outlet 5, thereby realizing a continuous solid-liquid separation production process.

[0043] Material enters the discharge cylinder section 8 through the feed pipe 1, and then is discharged through the discharge port I 81 to the annular area between the screw pusher and the drum for solid-phase separation. When the feed rate is large and the material cannot be discharged in time, the material will rush from the discharge cylinder section 8 into the transition cylinder section 9, and then be discharged through the discharge port III 91 on the transition cylinder section 9. Since the discharge port III 91 of the transition cylinder section 9 is located close to the solid phase discharge port 2, it is very easy for the material to be discharged from the solid phase discharge port 2 before it has been separated, which easily leads to a high water content in the solid phase. In addition to wasting material, it also results in the discharged solid phase not meeting the standards, often requiring secondary treatment, which undoubtedly increases operating costs and cannot achieve the maximum processing capacity. This application makes the following innovative design to address the technical defects of the above-mentioned prior art. Example

[0044] like Figure 2 and Figure 3 As shown, a flow guiding device for a horizontal screw centrifuge includes a feed pipe 1, a transition section 9, and a discharge section 8. The feed inlet of the feed pipe 1 is on the same side as the solid phase discharge outlet 2, and its discharge outlet extends into the discharge section 8. The end near the solid phase discharge outlet 2 is the small end of the screw pusher 3, and the end away from the solid phase discharge outlet 2 is the large end of the screw pusher 3. A discharge outlet III 91 is provided on the shell of the transition section 9, and a flow guiding channel I 10 is provided on the outside of the shell. The discharge outlet IV 101 of the flow guiding channel I 10 is located on the outside of the shell at the end of the discharge section 8 away from the transition section 9. The material inside the transition section 9 is discharged sequentially through the discharge outlet III 91, the flow guiding channel I 10, and the discharge outlet IV 101. The transition section 9 is a conical structure that increases in size from the small end to the large end, and it guides the material through the flow guiding channel I 10 to a position near the large end of the screw pusher 3 for separation. Preferably, the discharge cylinder section 8 has a discharge port I81 on its shell, and the guide channels I81 are distributed at intervals with the discharge port I81; the number of guide channels I10 is at least two, and they are evenly distributed along the circumference of the shell of the discharge cylinder section 8.

[0045] With the small end of the spiral pusher 3 pointing left and the large end pointing right, preferably, the discharge port III 91 is located at the right end of the transition section 9, allowing the material inside the transition section 9 to enter the guide channel I 10 more smoothly. The guide channel I 10 is a steel plate sealed and welded to the outer wall of the discharge section 8 of the transition section 9. Its cross-sectional shape can be arc-shaped, rectangular, or other regular or irregular shapes. This embodiment does not limit its specific shape. Preferably, the discharge port IV 101 is located at the left end of the discharge section 8. This ensures that the material can be separated under a large centrifugal force while also having a longer separation time, so that the material separation effect reaches the optimal state.

[0046] This embodiment also provides a centrifuge, which includes the above-described horizontal spiral centrifuge flow guiding device. Therefore, it has corresponding beneficial effects, as detailed in the preceding description, which will not be repeated here. Example

[0047] like Figure 4 and Figure 5 As shown, this embodiment differs from Embodiment 1 in that the flow guide channel II is located inside the shell of the discharge cylinder section 8, resulting in a compact structure. The following is a detailed description of this embodiment:

[0048] A partition I12 is provided between the transition section 9 and the discharge section 8. A guide hole I121 is provided on the partition I12. The discharge section 8 has a guide channel II11 inside its shell, isolated from the discharge channel 83. A discharge port II82 is provided on the shell of the discharge section 8, located at the end of the shell furthest from the transition section 9. Material inside the transition section 9 is discharged sequentially through the guide hole I121, the guide channel II11, and the discharge port II82. Preferably, the discharge port II82 is located at the left end of the shell of the discharge section 8. This ensures both a large centrifugal force on the material and a longer separation time, achieving optimal material separation.

[0049] Preferably, the discharge cylinder section 8 has a discharge port I 81 on its shell, and the guide channels II 11 are spaced apart from the discharge port I 81; the number of guide channels II 11 is at least two, and they are evenly distributed along the circumference. Preferably, the cross-sectional shape of the guide channels II 11 is fan-shaped; the guide channels II 11 and the discharge channel 83 are separated by angle iron or two mutually perpendicular steel plates, so that they do not interfere with each other, the structure is simple, and the manufacturing is convenient.

[0050] Preferably, the guide hole I121 is located on the outside of the partition I12, that is, between the inner wall of the discharge cylinder section 8 and the outer wall of the partition I12, so that the material can quickly enter the guide channel II11. A material channel connecting the transition cylinder section 9 and the discharge cylinder section 8 is provided between the outer wall of the partition I12 and the outer wall of the feed pipe 1. This channel is a known prior art and will not be described in detail here. Example

[0051] like Figure 6 As shown, this embodiment differs from Embodiment 2 in that, although the structure is slightly more complex than that of Embodiment 2, it further enhances the centrifugal force by extending the material guide channel to the guide cylinder section 13. The following is a detailed description of this embodiment:

[0052] The flow guiding device also includes a flow guiding cylinder section 13 located at the large end of the screw pusher 3. A partition plate I12 is provided between the transition cylinder section 9 and the discharge cylinder section 8, and a partition plate II14 is provided between the discharge cylinder section 8 and the flow guiding cylinder section 13. A flow guiding hole I121 is provided on the partition plate I12. A flow guiding channel II11, which is isolated from the discharge channel, is provided inside the shell of the discharge cylinder section 8. A flow guiding hole II141 is provided on the partition plate II14. A discharge port V131 is provided on the shell of the flow guiding cylinder section 13 near the discharge cylinder section 8. That is, the discharge port V131 is located on the shell at the left end of the flow guiding cylinder section 13. The material inside the transition cylinder section 9 is discharged sequentially through the flow guiding hole I121, the flow guiding channel II11, the flow guiding hole II141, the flow guiding cylinder section 13, and the discharge port V131. Example

[0053] like Figure 7 As shown, this embodiment differs from Embodiment 3 in that it avoids the accumulation of a large amount of material inside the guide tube section 15. A guide channel Ⅲ15 is provided inside the guide tube section 13, and the cross-sectional shape of the guide channel Ⅲ15 is rectangular. A guide channel Ⅲ15 is provided between the guide hole Ⅱ141 and the discharge port Ⅴ131. The material inside the transition tube section 9 is discharged sequentially through the guide hole Ⅰ121, the guide channel Ⅱ11, the guide hole Ⅱ141, the guide channel Ⅲ15, and the discharge port Ⅴ131. Preferably, the above-mentioned guide channel Ⅲ15 is jointly composed of an L-shaped steel plate, a partition Ⅱ14, and the inner wall of the transition tube section 9. One end of the L-shaped steel plate is connected to the right side of the partition Ⅱ14, and the other end is connected to the inner wall of the transition tube section 9. Example

[0054] like Figure 8 As shown, the difference between this embodiment and embodiment four is that the cross-sectional shape of the flow channel Ⅲ15 is triangular, which is simpler in structure and easier to manufacture than embodiment four.

[0055] Preferably, the discharge cylinder section 8 is provided with a conical buffer 16 corresponding to the discharge port position of the feed pipe 1. The conical buffer 16 not only effectively buffers the impact of the material from the feed pipe 1 on the partition II 14, but also guides the material flow, further improving operating efficiency. Preferably, the conical buffer 16 is connected to the left side of the partition II 14.

[0056] It should be noted that the above-mentioned materials refer to mixtures containing solid and liquid phases, such as soil, mud, and drilling fluid.

[0057] The above provides a detailed description of the horizontal spiral centrifuge flow guiding device and centrifuge provided by the present invention. Specific examples have been used to illustrate the structural principle and implementation method of the present invention. The above embodiments are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A flow guiding device for a horizontal screw centrifuge, comprising a feed pipe, a transition section, and a discharge section, wherein the feed inlet of the feed pipe is on the same side as the solid phase discharge outlet, and its discharge outlet extends into the interior of the discharge section; the end near the solid phase discharge outlet is the small end of the screw pusher, and the end away from the solid phase discharge outlet is the large end of the screw pusher, characterized in that: The transition section is a tapered structure that increases in size from the small end to the large end. It guides the material through the flow channel to a position near the large end of the screw pusher for separation. The transition cylinder section has a discharge port Ⅲ on its shell and a flow guide channel Ⅰ on its outer side. The discharge port Ⅳ of the flow guide channel Ⅰ is located on the outer side of the shell at the discharge cylinder section end away from the transition cylinder section. The material inside the transition cylinder section is discharged sequentially through the discharge port Ⅲ, the flow guide channel Ⅰ and the discharge port Ⅳ. The number of the flow guiding channels I is at least two, and they are evenly distributed along the circumference of the discharge cylinder section shell; The discharge cylinder section has a discharge port I on its shell, and the flow guiding channel I is distributed at intervals with the discharge port I; The discharge port Ⅲ is located at one end of the transition cylinder section near the large end of the screw pusher, so that the material inside the transition cylinder section can enter the guide channel Ⅰ more smoothly. The flow channel I is a steel plate, which is sealed and welded to the outer wall of the shell of the transition cylinder section and the discharge cylinder section. The cross-sectional shape is arc-shaped or rectangular. The discharge port IV is located at the end of the discharge cylinder section near the large end of the screw pusher.

2. A centrifuge, comprising a flow guiding device, characterized in that: The flow guiding device is the flow guiding device for a horizontal spiral centrifuge as described in claim 1.

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