An overflow baffle that can block lightweight solid phases

Abstract

This utility model discloses an overflow baffle capable of blocking light solid phases, comprising a connecting baffle, a connecting cylinder, and a blocking plate; the connecting baffle and the blocking plate are respectively connected to both sides of the connecting cylinder; the connecting baffle is connected to the liquid phase end journal, a liquid phase port is provided on the side of the connecting cylinder near the blocking plate, and a drain port is provided on the side of the connecting baffle away from the liquid phase port, both the liquid phase port and the drain port communicating with the inner cavity of the connecting cylinder; the inner cavity of the connecting cylinder includes a solid phase separation zone, an intermediate zone, and a liquid phase outflow zone, wherein the solid phase separation zone communicates with the liquid phase port, the liquid phase outflow zone communicates with the drain port, and the intermediate zone is used to connect the solid phase separation zone and the liquid phase outflow zone. The liquid phase port of the connecting cylinder is located on the outer side near the liquid phase end journal, allowing liquid to flow in; light solid phase impurities are blocked by the blocking plate, and the liquid forms a liquid ring in the connecting cylinder, further blocking light solid phase impurities and ensuring separation effect.

Description

Technical Field

[0001] This utility model belongs to the field of centrifuge technology, specifically an overflow baffle that can block light solid phases. Background Technology

[0002] A horizontal screw centrifuge is a highly efficient centrifugal separation device. Its working principle involves the drum and screw rotating at high speed in the same direction with a certain differential speed. Material is continuously introduced into the inner cylinder of the conveying screw through the feed pipe, accelerated, and then enters the drum. Under the action of centrifugal force, the heavier solids deposit on the drum wall, forming a sludge layer. The conveying screw continuously pushes the deposited solids to the conical end of the drum, where they are discharged from the machine through the sludge discharge port. The lighter liquids form an inner liquid ring, continuously overflowing from the mixing port at the large end of the drum and being discharged from the machine through the liquid discharge port.

[0003] As we know from the working principle of a horizontal decanter centrifuge, its solid-liquid separation relies heavily on the mass of the solid phase in the mixed liquid. When the solid phase is relatively light, it is difficult for it to adhere stably to the drum wall. Some of the solid enters the inner liquid ring and flows with the liquid, eventually exiting from the liquid outlet. Therefore, existing horizontal decanter centrifuges suffer from poor solid-liquid separation performance when separating lighter solid phases.

[0004] Patent CN213727168U discloses a horizontal decanter centrifuge. This centrifuge uses a disc system added between the drum shell and the inner tube near the light phase outlet to quickly separate tiny solid particles from the liquid phase. However, this disc design obstructs the liquid outflow, resulting in higher pressure and faster liquid flow at the outlet. The faster flow rate makes it easier for solid particles to be carried out, thus the separation effect remains poor. Utility Model Content

[0005] The purpose of this invention is to provide an overflow baffle that can block lightweight solid phases, so as to solve the following technical problems mentioned in the background art:

[0006] Some horizontal screw centrifuges have problems with poor solid-liquid separation when separating lighter solids.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] An overflow baffle capable of blocking light solid phases is disclosed. The overflow baffles are evenly spaced around the liquid phase end journal of a horizontal screw centrifuge. The overflow baffle includes a connecting baffle, a connecting cylinder, and a blocking plate. The connecting baffle and the blocking plate are respectively connected to both sides of the connecting cylinder. The connecting baffle is connected to the liquid phase end journal. A liquid phase port is provided on the side of the connecting cylinder near the blocking plate, and a drain port is provided on the side of the connecting baffle away from the liquid phase port. Both the liquid phase port and the drain port are connected to the inner cavity of the connecting cylinder. The inner cavity of the connecting cylinder includes a solid phase separation zone, an intermediate zone, and a liquid phase outflow zone. The solid phase separation zone is connected to the liquid phase port, the liquid phase outflow zone is connected to the drain port, and the intermediate zone is used to connect the solid phase separation zone and the liquid phase outflow zone.

[0009] Furthermore, the connecting baffle is provided with a number of connecting holes at even intervals along its circumference.

[0010] Furthermore, the connecting hole is provided with an internal thread, and the connecting baffle is connected to the journal bolt of the liquid phase end.

[0011] Furthermore, the connecting cylinder has a cylindrical structure, and the cross-section of the liquid phase inlet is crescent-shaped.

[0012] Furthermore, the liquid inlet has two inlets: a radial inlet and an axial inlet.

[0013] Furthermore, the area of ​​the opening at the axial inlet end of the liquid inlet is larger than the area of ​​the opening at the radial inlet end.

[0014] Furthermore, the opening area of ​​the drain port is larger than the opening area of ​​the axial inlet end of the liquid phase port.

[0015] Furthermore, the bottom of the liquid phase outflow zone is aligned with the bottom of the drain port.

[0016] Furthermore, the connecting baffle, connecting cylinder, and blocking plate are all made of stainless steel.

[0017] Furthermore, at least four overflow baffles are evenly spaced around the circumference of the liquid phase end journal.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The overflow baffle design, through the inclusion of a connecting baffle, connecting cylinder, and blocking plate, forms an integrated fluid control system. Liquid enters the connecting cylinder, while light solids are blocked outside, allowing the liquid to separate from the light solids upon outflow. Centrifugal force causes the liquid to form a liquid ring within the connecting cylinder; the light solids are blocked outside this ring by the blocking plate. The deeper the liquid ring, the better the separation of light solids. This design effectively separates light solids from the inner ring liquid, ensuring liquid purity. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overflow baffle of this utility model installed on a horizontal screw centrifuge;

[0021] Figure 2 This is a schematic diagram of the overall structure of the overflow baffle of this utility model;

[0022] Figure 3 This is a side view of the overflow baffle of this utility model;

[0023] Figure 4 This is a cross-sectional schematic diagram of the overflow baffle of this utility model.

[0024] The markings in the diagram are: 1-Horizontal screw centrifuge, 2-Overflow baffle, 3-Liquid phase end journal, 4-Connecting baffle, 5-Connecting hole, 6-Connecting cylinder, 7-Liquid phase port, 8-Blocking plate, 9-Drain port, 10-Solid phase separation zone, 11-Intermediate zone, 12-Liquid phase outflow zone, 13-Axial inlet end, 14-Radial inlet end. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example:

[0027] An overflow baffle capable of blocking lightweight solid phases, such as Figure 1 As shown, overflow baffles 2 are evenly spaced around the liquid phase end journal 3 of the horizontal screw centrifuge 1, as follows: Figure 2 As shown, the overflow baffle 2 includes a connecting baffle 4, a connecting cylinder 6, and a blocking plate 8; the connecting baffle 4 and the blocking plate 8 are respectively connected to both sides of the connecting cylinder 6; the connecting baffle 4 is connected to the liquid phase end journal 3, a liquid phase port 7 is provided on the side of the connecting cylinder 6 near the blocking plate 8, and a drain port 9 is provided on the side of the connecting baffle 4 away from the liquid phase port 7; both the liquid phase port 7 and the drain port 9 communicate with the inner cavity of the connecting cylinder 6; Figure 4 As shown, the inner cavity of the connecting cylinder 6 includes a solid phase separation zone 10, an intermediate zone 11, and a liquid phase outflow zone 12. The solid phase separation zone 10 is connected to the liquid phase port 7, the liquid phase outflow zone 12 is connected to the liquid discharge port 9, and the intermediate zone 11 is used to connect the solid phase separation zone 10 and the liquid phase outflow zone 12.

[0028] The horizontal screw centrifuge 1 is existing technology, and its specific structure will not be described in detail here. During separation in the centrifuge 1, the mixture inside the centrifuge 1 undergoes layering, with the heavier solid phase located in the outer layer, the liquid in the middle layer, and the lighter solid phase mixed with liquid in the inner layer. The baffle plate 8 prevents the lighter solid phase from flowing into the solid-phase separation zone 10. The liquid in the middle layer enters the solid-phase separation zone 10 through the liquid phase inlet 7. Due to centrifugation and the obstruction of the baffle plate 8, the lighter solid phase impurities separate from the liquid. The liquid then flows from the solid-phase separation zone 10 into the middle zone 11, then from the middle zone 11 into the liquid phase outlet zone 12, and finally exits from the drain port 9. It should also be noted that the height of the liquid phase port 7 is lower than the liquid surface, and the height of the drain port 9 is lower than the height of the liquid phase port. This design causes the liquid to form a liquid ring inside the connecting cylinder 6. The depth of the liquid ring is the height between the liquid phase port 7 and the drain port 9. The deeper the liquid ring, the further the light solid phase impurities are from the inside, and the better the blocking effect of the baffle plate 8. In other words, the deeper the liquid ring, the better the effect of intercepting light solid phases with low density.

[0029] This design improves the solid-liquid separation effect of the horizontal screw centrifuge 1. It can effectively separate light solids from the liquid, ensuring the purity of the liquid after centrifugation.

[0030] In a preferred embodiment, such as Figure 2 As shown, the connecting baffle 4 is provided with a plurality of connecting holes 5 evenly spaced circumferentially. Further optimized, the connecting holes 5 are provided with internal threads, and the connecting baffle 4 is bolted to the liquid phase end journal 3. By adding internal threads to the connecting holes 5, the connecting baffle 4 can be firmly fixed to the liquid phase end journal 3 with bolts, ensuring that it will not loosen during high-speed rotation and operation, thus guaranteeing the stability and reliability of the equipment. The design of the connecting holes 5 with internal threads makes the connection process between the connecting baffle 4 and the liquid phase end journal 3 simpler and more efficient. Furthermore, this design also facilitates the replacement of the overflow baffle 2.

[0031] In a preferred embodiment, such as Figure 2 as well as Figure 3 As shown, the connecting cylinder 6 has a cylindrical structure, and the liquid inlet 7 has a crescent-shaped cross-section. The cylindrical structure of the connecting cylinder 6 facilitates the flow of liquid within it, while the top of the crescent-shaped liquid inlet 7 has an arc-shaped mechanism, which facilitates the entry of liquid into the connecting cylinder 6 through the liquid inlet 7. This structure of the liquid inlet 7 results in less swirling flow when the liquid enters the connecting cylinder 6, allowing the liquid to enter the interior of the connecting cylinder 6 smoothly.

[0032] In a preferred embodiment, such as Figure 4As shown, the liquid inlet 7 has two inlets: a radial inlet 14 and an axial inlet 13. The radial inlet 14 allows liquid to enter the connecting cylinder 6 radially, while the axial inlet 13 allows liquid to enter the connecting cylinder 6 axially. The liquid enters the solid-phase separation zone 10 within the connecting cylinder 6 from both inlets, increasing the liquid flow rate.

[0033] In a preferred embodiment, such as Figure 4 As shown, the area of ​​the opening at the axial inlet end 13 of the liquid inlet 7 is larger than the area of ​​the opening at the radial inlet end 14. This design makes the liquid flowing from the liquid inlet 7 into the connecting cylinder 6 more axial, ensuring the depth of the liquid ring and also ensuring the separation effect.

[0034] In a preferred embodiment, such as Figure 4 As shown, the opening area of ​​the drain port 9 is larger than the opening area of ​​the axial inlet end 13 of the liquid phase port 7. The larger opening area of ​​the drain port 9 helps to reduce the pressure of the fluid in the connecting cylinder 6, which can effectively prevent light liquid phase impurities from being carried into the connecting cylinder 6 by the liquid, ensuring the continuity and stability of the system, and ensuring that light solid phases in the liquid can be stably separated.

[0035] In a preferred embodiment, such as Figure 4 As shown, the bottom of the liquid outflow zone 12 is aligned with the bottom of the drain port 9. By aligning the bottom of the liquid outflow zone 12 with the bottom of the drain port 9, a direct channel is formed for the liquid to flow out, reducing pressure loss and flow resistance during liquid discharge. When the bottom of the liquid outflow zone 12 is aligned with the bottom of the drain port 9, the liquid will not stagnate in the outflow zone due to uneven bottoms, thereby reducing the residence time of the liquid in the system. The bottom alignment design helps ensure that the liquid flows out without being disturbed by changes in liquid level. This design allows the liquid outflow zone 12 to maintain an optimal flow state during solid-phase separation.

[0036] In a preferred embodiment, the connecting baffle 4, connecting cylinder 6, and baffle 8 are all made of stainless steel. Stainless steel has high strength and toughness, and can withstand the high-speed rotation and impact forces generated during equipment operation. This strength ensures that the connecting baffle 4, connecting cylinder 6, and baffle 8 remain stable under centrifugal force and will not affect the separation effect due to deformation or breakage.

[0037] In a preferred embodiment, at least four overflow baffles 2 are evenly spaced around the liquid phase end journal 3. The multiple overflow baffles 2 ensure a more uniform distribution of liquid during flow, preventing localized overflow during liquid inlet. Uniform flow helps improve the working conditions of the solid-liquid separation zone, enabling the equipment to maintain stable separation performance under different operating conditions. In this embodiment, four overflow baffles 2 are specifically provided, spaced 90 degrees apart. This design ensures the stable operation of each overflow baffle 2.

[0038] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An overflow baffle capable of blocking light solid phases, wherein overflow baffles (2) are uniformly spaced circumferentially on the journal (3) of the liquid phase end of a horizontal screw centrifuge (1), characterized in that: The overflow baffle (2) includes a connecting baffle (4), a connecting cylinder (6), and a blocking plate (8); The connecting baffle (4) and the blocking plate (8) are respectively connected to the two sides of the connecting cylinder (6); the connecting baffle (4) is connected to the liquid phase end journal (3), and a liquid phase port (7) is provided on the side of the connecting cylinder (6) near the blocking plate (8), and a drain port (9) is provided on the side of the connecting baffle (4) away from the liquid phase port (7). Both the liquid phase port (7) and the drain port (9) are connected to the inner cavity of the connecting cylinder (6). The inner cavity of the connecting cylinder (6) includes a solid phase separation zone (10), an intermediate zone (11) and a liquid phase outflow zone (12). The solid phase separation zone (10) is connected to the liquid phase port (7), the liquid phase outflow zone (12) is connected to the drain port (9), and the intermediate zone (11) is used to connect the solid phase separation zone (10) and the liquid phase outflow zone (12).

2. A flow barrier according to claim 1, wherein: The connecting baffle (4) is provided with several connecting holes (5) at even intervals around its circumference.

3. A flow barrier according to claim 2, wherein: The connecting hole (5) is provided with an internal thread, and the connecting baffle (4) is bolted to the liquid phase end journal (3).

4. A flow barrier according to claim 1, wherein: The connecting cylinder (6) has a cylindrical structure, and the liquid phase port (7) has a crescent-shaped cross section.

5. A flow barrier according to claim 1, wherein: The liquid inlet (7) has two inlets: a radial inlet (14) and an axial inlet (13).

6. A flow barrier according to claim 5, wherein: The area of ​​the opening of the axial liquid inlet end (13) of the liquid phase port (7) is larger than the area of ​​the opening of the radial liquid inlet end (14).

7. A flow barrier according to claim 5, wherein: The opening area of ​​the drain port (9) is larger than the opening area of ​​the axial inlet end (13) of the liquid phase port (7).

8. An overflow baffle capable of blocking lightweight solid phases according to claim 1, characterized in that: The bottom of the liquid outflow zone (12) is aligned with the bottom of the drain port (9).

9. A flow barrier according to claim 1, wherein: The connecting baffle (4), connecting cylinder (6) and blocking plate (8) are all made of stainless steel.

10. An overflow baffle capable of blocking lightweight solid phases according to claim 1, characterized in that: The liquid phase end journal (3) is provided with at least four overflow baffles (2) at even intervals in the circumference.

Images