Wastewater centrifuge

Abstract

This invention discloses a wastewater centrifuge device, relating to the field of wastewater treatment technology, comprising a cylinder, a negative pressure pipe, a rectifier plate, and a sludge storage tank. The cylinder is used to immerse itself in wastewater and forms a centrifugal cavity within it. The cylinder has an inlet and a sludge outlet communicating with the centrifugal cavity, with the axial direction of the inlet forming an angle with the radial direction of the cylinder. One end of the negative pressure pipe extends into the centrifugal cavity and forms a suction port communicating with the inner cavity of the negative pressure pipe. The negative pressure pipe is used to connect to a slurry pump. The rectifier plate is fixedly disposed within the centrifugal cavity and divides the centrifugal cavity into a first chamber and a second chamber distributed along the axial direction of the cylinder. Both the inlet and the suction port communicate with the first chamber, and the sludge outlet communicates with the second chamber. The rectifier plate has multiple inclined channels communicating with the first and second chambers. These inclined channels are arranged in the same direction of rotation along the circumference of the rectifier plate so that the fluid forms a swirling flow field after passing through the rectifier plate. The sludge storage tank is connected to the cylinder and forms a sludge storage cavity communicating with the sludge outlet.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a wastewater centrifuge device. Background Technology

[0002] In the field of water treatment, the efficient separation of suspended solids in wastewater is a core factor that determines the effectiveness of water treatment, operating costs, and adaptability to operating conditions.

[0003] In existing technologies, centrifugal separation is commonly used to separate suspended solids. Hydrocyclones are key components in this process, as the separation of suspended solids from water primarily occurs within the hydrocyclone. However, to allow wastewater containing suspended solids to enter the hydrocyclone, a slurry pump is often placed at the front end of the hydrocyclone, directly drawing the wastewater into it.

[0004] In actual coal mining, if the wastewater treated by the slurry pump contains large, hard particles (such as coal lumps and gangue) exceeding its design standards, it can easily cause blockages in the feed inlet or flow channel. This can lead to severe cavitation, mechanical seal failure due to dry running, and severe abrasive wear caused by continuous scouring by hard particles. These factors are the direct cause of rapid damage to flow components such as impellers and wear plates, which in turn can lead to motor overload or burnout. In the underground coal mine environment, once the motor overloads and burns out, it needs to be replaced. In the confined space underground, replacing the motor is not only cumbersome but also delays the normal progress of mine wastewater treatment. Motor overload and burnout can also trigger major safety accidents such as gas explosions, causing serious harm to personnel and equipment underground. Summary of the Invention

[0005] The main objective of this invention is to provide a wastewater centrifuge device that addresses the problem of blockage at the feed inlet or flow channel and damage to the slurry pump when wastewater contains large, hard particles.

[0006] To achieve the above objectives, the wastewater centrifuge device proposed in this invention includes a cylinder, a negative pressure pipe, a rectifier plate, and a sludge storage tank. The cylinder is submerged in wastewater, and a centrifuge chamber is formed within the cylinder. An inlet communicating with the centrifuge chamber is formed on the side wall of the cylinder, and the axial direction of the inlet is angled to the radial direction of the cylinder. A sludge outlet is also provided on the bottom wall of the cylinder. The negative pressure pipe is located on the top wall of the cylinder, and one end of the negative pressure pipe is connected to a slurry pump. The rectifier plate is fixedly disposed within the centrifuge chamber and divides the centrifuge chamber into several sections distributed along the axial direction of the cylinder. The system comprises a first chamber and a second chamber. The feed inlet is connected to the first chamber, and the slag outlet is connected to the second chamber. The end of the negative pressure pipe away from the slurry pump extends into the second chamber and forms a suction port that communicates with the inner cavity of the negative pressure pipe. The rectifier plate has multiple inclined channels that connect the first chamber and the second chamber. The multiple inclined channels are arranged in the same direction of rotation along the circumference of the rectifier plate so that the fluid forms a swirling flow field after passing through the rectifier plate. The slag storage tank is connected to the cylinder, and a slag storage cavity that communicates with the slag outlet is formed inside the slag storage tank.

[0007] In one embodiment, the axial direction of the inclined channel forms a first angle with the axial direction of the cylinder, the first angle being α, where 0° < α < 90°; the projection of the axial direction of the inclined channel onto a plane perpendicular to the axial direction of the cylinder forms a second angle with the radial direction of the cylinder, the second angle being β, where 0° < β ≤ 90°.

[0008] In one embodiment, the rectifier disk extends in a direction perpendicular to the axial direction of the cylinder.

[0009] In one embodiment, the total flow area of ​​the plurality of inclined channels is S1, the flow area of ​​the feed inlet is S2, and 1.2≤S1 / S2≤1.8.

[0010] In one embodiment, the rectifier plate is further provided with a clearance hole, and the end of the negative pressure pipe away from the slurry pump passes through the clearance hole and extends into the center of the second chamber so that the suction port communicates with the second chamber.

[0011] In one embodiment, a plurality of the inclined channels are arranged around the clearance hole.

[0012] In one embodiment, the axial direction of the negative pressure pipe is collinear with the axial direction of the cylinder; and / or, the axial direction of the feed inlet is perpendicular to the radial direction of the cylinder.

[0013] In one embodiment, the wastewater centrifuge further includes a slag discharge pipe, which is equipped with a slag discharge valve; the slag discharge pipe is connected to the slag storage tank and the inner cavity of the slag discharge pipe communicates with the slag storage tank.

[0014] In one embodiment, the wastewater centrifuge device further includes a control unit and a sludge interface meter, the sludge interface meter being used to sense the sludge height in the sludge storage tank; the sludge discharge valve is an electric valve, and both the sludge discharge valve and the sludge interface meter are electrically connected to the control unit.

[0015] In one embodiment, the first chamber is cylindrical, and the second chamber is conical and gradually narrows along the direction from the rectifier plate to the slag outlet.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention places the slurry pump at the rear and uses negative pressure suction to perform cyclone separation. The separated large-sized particles enter the slurry storage chamber, and the separated clean water enters the slurry pump, which can prevent large-sized particles from causing slurry pump blockage and motor damage.

[0017] (2) Traditional hydrocyclones have significant drawbacks, as they cannot separate large-sized hard particles and water using negative pressure suction. On the one hand, the upward suction force of negative pressure counteracts the gravity of the particles, preventing the centrifuged particles from settling naturally and hindering the smooth entry of the cyclone into the second chamber. On the other hand, the pressure difference generated by the negative pressure is insufficient to form a strong vortex, significantly reducing the separation effect. To address these issues, this invention makes two key improvements: First, the negative pressure pipe is inserted deep into the center of the second chamber and close to the bottom of the centrifuge chamber, so that the suction force is in the same direction as gravity, guiding the fluid to the bottom of the chamber and solving the problem of force field cancellation. Second, a specially designed rectifier plate is used to accelerate the radial flow of the fluid, enhance the intensity of the vortex within the chamber, and simultaneously improve the cyclone separation and flocculation capabilities. The improved device achieves a separation effect close to that of positive pressure feeding, ultimately realizing the efficient separation of large-sized hard particles and water. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a structure of an embodiment of the wastewater centrifuge device provided by the present invention; Figure 2 for Figure 1 Top view of a wastewater centrifuge unit; Figure 3 for Figure 1 Cross-sectional view of a wastewater centrifuge device; Figure 4 for Figure 3 Schematic diagram of the structure of the central rectifier disk; Figure 5 for Figure 4 Front view of the central rectifier disk; Figure 6 for Figure 4 Top view of the central rectifier disk.

[0020] Explanation of icon numbers: 100. Wastewater centrifuge device; 1. Shell; 1a. Centrifuge chamber; 1a1. First chamber; 1a2. Second chamber; 1b. Feed inlet; 1c. Slag outlet; 2. Negative pressure pipe; 2a. Suction port; 3. Rectifier plate; 3a. Inclined channel; 3b. Clearance hole; 31. Guide pipe; 4. Slag storage tank; 4a. Slag storage chamber; 5. Slag discharge pipe; 51. Slag discharge valve; 6. Sludge interface meter; 61. Induction probe.

[0021] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0024] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0025] This invention proposes a wastewater centrifuge device 100.

[0026] Please see Figures 1 to 4 In one embodiment of the present invention, the wastewater centrifuge device 100 includes a cylinder 1, a negative pressure pipe 2, a rectifier plate 3, and a sludge storage tank 4; the cylinder 1 is used to be immersed in wastewater, and a centrifuge chamber 1a is formed inside the cylinder 1. An inlet 1b communicating with the centrifuge chamber 1a is formed on the side wall of the cylinder 1. The axial direction of the inlet 1b is set at an angle to the radial direction of the cylinder 1. A sludge outlet 1c is also provided on the bottom wall of the cylinder 1; the negative pressure pipe 2 is provided on the top wall of the cylinder 1, and one end of the negative pressure pipe 2 is used to connect to a slurry pump; the rectifier plate 3 is fixedly disposed in the centrifuge chamber 1a and divides the centrifuge chamber 1a into a first chamber 1 distributed along the axial direction of the cylinder 1. The first chamber 1a1 is connected to the second chamber 1a2. The inlet 1b is connected to the first chamber 1a1. The outlet 1c is connected to the second chamber 1a2. The end of the negative pressure pipe 2 away from the slurry pump extends into the second chamber 1a2 and forms a suction port 2a that is connected to the inner cavity of the negative pressure pipe 2. Multiple inclined channels 3a are formed on the rectifier plate 3, which are connected to the first chamber 1a1 and the second chamber 1a2. The multiple inclined channels 3a are arranged in the same direction of rotation along the circumference of the rectifier plate 3 so that the fluid forms a swirling flow field after passing through the rectifier plate 3. The slag storage tank 4 is connected to the cylinder 1, and a slag storage cavity 4a connected to the outlet 1c is formed inside the slag storage tank 4.

[0027] In this embodiment, the cylinder 1 is used to be submerged in sewage, and a centrifuge chamber 1a is formed inside the cylinder 1. The cylinder 1 can be a cylindrical cylinder 1, or other rotating body structures can be adopted. Its material can be corrosion-resistant materials such as stainless steel to adapt to working conditions such as mine water. A feed inlet 1b communicating with the centrifuge chamber 1a is formed on the side wall of the cylinder 1. The axial direction of the feed inlet 1b is set at an angle to the radial direction of the cylinder 1. This angle can be a right angle (e.g., ...). Figure 2As shown in the diagram, or at approximately a right angle, this arrangement allows fluids such as wastewater to enter the centrifuge chamber 1a tangentially or approximately tangentially. Due to the constraint of the inner wall of the centrifuge chamber 1a and the inertia of the tangential feed, the fluid cannot move in a straight line, but instead forms a vortex flow field within the cylinder 1. In addition, the bottom wall of the cylinder 1 is provided with a slag outlet 1c, which is located in the bottom region of the centrifuge chamber 1a, facilitating the downward collection and discharge of large particles with higher density under the combined action of gravity and centrifugal force.

[0028] A negative pressure pipe 2 is located on the top wall of the cylinder 1. One end of the negative pressure pipe 2 extends into the second chamber 1a2 and forms a suction port 2a communicating with the inner cavity of the negative pressure pipe 2. The other end of the negative pressure pipe 2 is used to connect to the slurry pump. The negative pressure pipe 2 can be a hollow tubular structure, and its material can be wear-resistant alloy or engineering plastic. The suction port 2a is located in the central axis region of the centrifuge chamber 1a. After pre-separation, the aqueous phase gathers in this region and enters the inner cavity of the negative pressure pipe 2 through the suction port 2a, and is then transported to the subsequent hydrocyclone through the negative pressure pipe 2. The connection method between the negative pressure pipe 2 and the slurry pump and the cylinder 1 can be flange connection, threaded connection, or clamp connection, etc.

[0029] A rectifier disk 3 is fixedly installed inside the centrifuge chamber 1a, dividing the centrifuge chamber 1a into a first chamber 1a1 and a second chamber 1a2 distributed along the axial direction of the cylinder 1. The rectifier disk 3 has a disc-shaped structure, and its outer periphery is sealed to the inner wall of the cylinder 1. The material of the rectifier disk 3 can be wear-resistant and corrosion-resistant materials such as alloy steel. The feed inlet 1b is connected to the first chamber 1a1, and the slag outlet 1c is connected to the second chamber 1a2. Multiple inclined channels 3a are formed on the rectifier disk 3, connecting the first chamber 1a1 and the second chamber 1a2. The multiple inclined channels 3a are arranged in the same direction of rotation along the circumference of the rectifier disk 3 so that the fluid forms a swirling flow field after passing through the rectifier disk 3. The cross-sectional shape of the inclined channels 3a can be circular, elliptical, etc., and its inclination angle and cross-sectional dimensions can be designed according to the water quality characteristics of the treated wastewater and the requirements for swirling intensity. When the vortex formed in the first chamber 1a1 flows through the rectifier disk 3, the fluid is regulated into a stable vortex along the same direction by the forced guiding effect of multiple inclined channels 3a. The vortex flow field is further enhanced in the second chamber 1a2, which significantly improves the centrifugal separation intensity, causing large particles to be thrown towards the inner wall of the centrifugal chamber 1a under the action of centrifugal force generated by the strong vortex.

[0030] The slag storage tank 4 is connected to the cylinder 1, and a slag storage cavity 4a communicating with the slag outlet 1c is formed inside the slag storage tank 4. The slag storage tank 4 can be a cylindrical tank or a conical tank, and its material can be the same as or different from that of the cylinder 1. The connection method between the slag storage tank 4 and the cylinder 1 can be welding, flange connection, etc.

[0031] Specifically, the entire cylinder 1 is submerged in the wastewater to be treated. When the slurry pump is running, it creates a negative pressure suction effect in the centrifuge chamber 1a through the negative pressure pipe 2. Driven by the pressure difference between the external water pressure and the negative pressure, the wastewater automatically enters the centrifuge chamber 1a of the cylinder 1 through the feed inlet 1b. After the fluid enters the centrifuge chamber 1a of the cylinder 1 from the feed inlet 1b, the fluid makes a tangential circular motion in the cylinder 1, accompanied by up-and-down motion along the axis of the cylinder 1 and radial motion along the cylinder 1. The kinetic energy of this fluid is rapidly converted into centrifugal force. The centrifugal acceleration in the cylinder 1 can reach tens to hundreds of times the acceleration due to gravity, providing the core driving force for the separation of suspended solids, large particles and other solids in the fluid. Due to the density difference between water and suspended solids and large particles in the fluid, the high-density suspended solids and large particles experience greater centrifugal force and are thrown towards the inner wall of the centrifuge, forming a wall-attached, enriched heavy phase layer. The low-density liquids, such as water, experience less centrifugal force and cannot overcome the radial pressure gradient and fluid drag, gradually accumulating towards the center of the centrifuge to form a light phase layer. Under the influence of the internal flow field of the centrifuge, the light and heavy phase layers form opposing swirling flows, one upward and one downward, i.e., an inner swirling flow and an outer swirling flow. It should be noted that "opposite" here refers to the opposite direction of motion of the inner and outer swirling flows along the axial direction of the cylinder 1, not their opposite directions of rotation. In the outer swirl, the heavy phase layer attached to the wall moves downward in a spiral motion along the wall under the constraints of centrifugal force and gravity, and eventually falls from the slag outlet 1c into the bottom slag storage tank 4; the light phase layer in the center, under the combined action of the suction force of the external slurry pump and the squeezing action of the heavy phase layer, forms an upward spiral motion in the center of the centrifuge, and is eventually sucked into the inner cavity of the negative pressure pipe 2 from the suction port 2a and transported to the slurry pump and the hydrocyclone.

[0032] It should be noted that the application environment of this wastewater centrifuge device 100 differs significantly from that of a hydrocyclone. Hydrocyclones are placed in equipment rooms or on the open ground, and their height is generally above 10m. This wastewater centrifuge device 100 is immersed in the wastewater (fluid) containing suspended solids to be treated. In one embodiment, the wastewater centrifuge device 100 has a maximum diameter of φ1.2m and a height of 2m, occupying a small space and saving project land area.

[0033] It is important to emphasize that traditional hydrocyclones do not have a rectifier plate 3. In traditional hydrocyclones, wastewater after separating large particles is discharged through an overflow pipe instead of a negative pressure pipe 2. Since there is no negative pressure when discharged through the overflow pipe, large particles can naturally descend under their own weight. If the overflow pipe of a traditional hydrocyclone is replaced with a negative pressure pipe, the suction force of the negative pressure will counteract the weight of the large particles, preventing them from moving downwards and instead causing them to be directly sucked away by the negative pressure pipe, making it difficult to achieve the pre-separation effect. To address the above problems, this embodiment makes two key improvements: First, the negative pressure pipe 2 is extended into the second chamber 1a2. Since the second chamber 1a2 is located below the inlet 1b and at the bottom of the centrifuge chamber 1a, the suction force and gravity can be aligned, guiding the fluid to the bottom of the chamber and solving the force field cancellation problem. Second, a specially designed rectifier plate 3 is used to accelerate the radial flow of the fluid, enhance the intensity of the vortex within the chamber, and simultaneously improve the hydrocyclone separation and flocculation capabilities. The improved device achieves a separation effect close to that of positive pressure feeding, ultimately realizing the efficient separation of large-sized hard particles from water.

[0034] In summary, the wastewater centrifuge device 100 of this embodiment achieves pre-separation of large-sized particles at the inlet of the slurry pump, which can efficiently pre-separate large-sized particles in wastewater, significantly reducing the concentration and size of solid particles entering the slurry pump, reducing wear on the slurry pump from the source, avoiding motor overload, and thus preventing safety accidents such as gas explosions in mines.

[0035] Please see Figures 4 to 6 In one embodiment of the present invention, the axial direction of the inclined channel 3a forms a first angle with the axial direction of the cylinder 1, the first angle being α, 0° < α < 90°; the projection of the axial direction of the inclined channel 3a onto a plane perpendicular to the axial direction of the cylinder 1 forms a second angle with the radial direction of the cylinder 1, the second angle being β, 0° < β ≤ 90°.

[0036] In this embodiment, the axial direction of the inclined channel 3a forms an angle with both the axial and radial directions of the cylinder 1, causing the inclined channel 3a to be arranged at an angle in three-dimensional space. The first angle α determines the degree of inclination of the inclined channel 3a in the axial direction of the cylinder 1, and the second angle β determines the degree of tangential deflection of the inclined channel 3a in the circumferential direction of the cylinder 1.

[0037] Specifically, the first included angle α ranges from 0° to 90°. If α is 0°, the axis of the inclined channel 3a is parallel to the axis of the cylinder 1, and the fluid cannot form a vortex, thus failing to generate centrifugal force. If α is 90°, the axis of the inclined channel 3a is perpendicular to the axis of the cylinder 1, making it impossible to form an effective axial vortex channel, which is detrimental to the fluid entering the second chamber 1a2 from the first chamber 1a1. Therefore, in this embodiment, α is greater than 0° and less than 90°, allowing the fluid to simultaneously possess axial and circumferential motion components, thus achieving the construction of a spiral vortex. In this way, when sewage flows through the inclined channel 3a, due to the presence of the first included angle α, the fluid acquires a component velocity along the axis of the cylinder 1, which helps to propel large-sized particles toward the second chamber 1a2 and the slag outlet 1c. However, since the axis of the inclined channel 3a is not completely parallel to the axis of the cylinder 1, it also prevents the fluid from flowing directly and rapidly along the axis, ensuring that the fluid obtains sufficient tangential velocity to form a stable vortex.

[0038] The second included angle β ranges from greater than 0° to less than or equal to 90°, where β is the angle between the projection of the inclined channel 3a onto the plane perpendicular to the axial direction of the cylinder 1 and the radial direction of the cylinder 1. When β is 0°, the projection of the inclined channel 3a onto the horizontal plane coincides with the radial direction, and the fluid has no circumferential tangential velocity component, thus failing to form a vortex. When β is greater than 0°, the fluid acquires a circumferential tangential velocity component, and a vortex begins to form. The larger β is, the higher the proportion of the tangential velocity component, and the greater the vortex intensity. When β is 90°, the projection of the inclined channel 3a onto the horizontal plane is consistent with the circumferential tangential direction of the cylinder 1, at which point the tangential velocity component reaches its maximum, and the vortex intensity is strongest. In this embodiment, β is greater than 0° and less than or equal to 90°, which ensures the effective formation of the vortex flow field and allows for flexible adjustment of the vortex intensity according to different wastewater qualities and separation requirements. Thus, when sewage flows through the inclined channel 3a, the presence of a second included angle β ensures that the fluid acquires a uniform tangential velocity after passing through the inclined channel 3a, enhancing the consistency of the swirling direction and further improving the centrifugal separation effect. It should be noted that because the projection of the axial direction of the inclined channel 3a onto the plane perpendicular to the axial direction of the cylinder 1 does not coincide with the radial direction of the cylinder 1, a tangential component is always present. This ensures that the fluid, after exiting the inclined channel 3a, acquires a uniform tangential momentum, which then converges in the second chamber 1a2 to form a stable and strong swirling flow, preventing turbulent swirling direction from negating the centrifugal effect and ensuring separation efficiency.

[0039] In summary, due to the presence of the first included angle α and the second included angle β, the vortex in the first chamber 1a1 passes through the rectifier disk 3 and forms a spiral swirling flow field in the second chamber 1a2, which combines axial propulsion and circumferential rotation. Compared with a simple vortex, this spiral swirling flow field has a stronger three-dimensional centrifugal separation capability. Large particles are thrown towards the inner wall of the centrifugal chamber 1a under the action of centrifugal force, and are more likely to converge towards the bottom slag outlet 1c under the push of the axial component velocity, thereby improving the slag discharge efficiency and reducing the retention of large particles in the centrifugal chamber 1a.

[0040] Please see Figure 3 In one embodiment of the present invention, the extension direction of the rectifier disk 3 is perpendicular to the axial direction of the cylinder 1.

[0041] In this embodiment, the extension direction of the rectifier disk 3 is perpendicular to the axial direction of the cylinder 1, that is, the central plane of the rectifier disk 3 is perpendicular to the axial direction of the cylinder 1. At this time, the axial direction of the rectifier disk 3 is collinear or parallel to the axial direction of the cylinder 1. The rectifier disk 3 is placed horizontally in the centrifugal cavity 1a with an orientation perpendicular to the axial direction of the cylinder 1, dividing the centrifugal cavity 1a into a first chamber 1a1 and a second chamber 1a2 distributed vertically along the axial direction. This arrangement makes the disk surface of the rectifier disk 3 parallel to the cross-section of the cylinder 1. During the axial flow, the fluid passes perpendicularly through the rectifier disk 3. The rectifying effect of the rectifier disk 3 on the vortex is evenly distributed on the axial cross-section, which is beneficial to ensure that the fluid entering each inclined channel 3a has a more consistent initial state and avoids excessive differences in the inflow conditions of different areas of the channel due to the inclination of the rectifier disk 3. The axial direction of the rectifier disk 3 is collinear or parallel to the axial direction of the cylinder 1, that is, the center of the rectifier disk 3 is located on the central axis of the cylinder 1. The outer periphery of the rectifier disk 3 is equidistant from the inner wall of the cylinder 1. When each inclined channel 3a is evenly distributed along the circumference, its distance from the central axis of the cylinder 1 is symmetrical and consistent, so that the rectified swirling flow field has good symmetry and uniformity in the circumferential direction, reducing the generation of eccentric vortices or local flow field distortion.

[0042] In one embodiment of the present invention, the total flow area of ​​the plurality of inclined channels 3a is S1, the flow area of ​​the feed inlet 1b is S2, and 1.2≤S1 / S2≤1.8.

[0043] In this embodiment, the flow area refers to the effective cross-sectional area through which fluid can actually pass. For the inclined channel 3a, the flow area is the minimum cross-sectional area of ​​the inner cavity of the inclined channel 3a perpendicular to the fluid flow direction (i.e., the axial direction of the inclined channel 3a). For example, when the cross-section of the inclined channel 3a is circular, the flow area is the area of ​​the circle corresponding to its inner diameter. The total flow area S1 of the multiple inclined channels 3a is the sum of the flow areas of each inclined channel 3a. This total flow area reflects the total flow capacity allowed by the rectifier plate 3. The flow area S2 of the inlet 1b is the effective cross-sectional area of ​​the inner cavity of the inlet 1b perpendicular to the fluid inflow direction. This cross-sectional area determines the initial flow capacity of sewage entering the centrifuge chamber 1a.

[0044] The ratio of the total flow area S1 of the multiple inclined channels 3a to the flow area S2 of the inlet 1b is limited to between 1.2 and 1.8. This is an optimized design based on the principles of fluid continuity and energy conservation to match the flow field before and after passing through the rectifier plate 3. When wastewater enters the first chamber 1a1 through the inlet 1b and forms a vortex, the vortex is forcibly diverted to each inclined channel 3a at the rectifier plate 3. If the ratio of S1 to S2 is too small, that is, the total flow area of ​​the inclined channels 3a is insufficient relative to the flow area of ​​the inlet 1b, the fluid will experience a large throttling resistance at the rectifier plate 3. The pressure in the first chamber 1a1 will increase, the vortex velocity will decrease, the swirling intensity will weaken, and the centrifugal separation effect will decrease. At the same time, excessively high throttling resistance will increase the negative pressure suction load of the slurry pump, which is not conducive to energy-saving operation. If the ratio of S1 to S2 is too large, that is, the total flow area of ​​the inclined channel 3a is too large relative to the flow area of ​​the feed inlet 1b, the flow velocity of the fluid in the inclined channel 3a will be too low. The forced rectification and guiding effect of the inclined channel 3a on the vortex will be weakened, and the fluid will have difficulty forming a stable and orderly swirling flow field after passing through the rectifier disk 3. Insufficient swirling intensity will also reduce the centrifugal separation effect.

[0045] Limiting the ratio of S1 to S2 to greater than or equal to 1.2 ensures that the total flow area of ​​the inclined channel 3a is slightly larger than that of the inlet 1b, providing the fluid with adequate flow margin at the rectifier plate 3 and preventing excessive pressure and vortex attenuation in the first chamber 1a1 due to the throttling effect. Limiting the ratio of S1 to S2 to less than or equal to 1.8 prevents excessively low flow velocity and weakened rectification effect in the inclined channel 3a due to an excessively large total flow area, ensuring that the fluid maintains sufficient flow velocity in each inclined channel 3a, allowing the three-dimensional guiding structure of the inclined channel 3a to effectively perform its forced rectification and vortex enhancement functions.

[0046] It should be noted that the number and diameter of the inclined channels 3a on the upper surface of the rectifier disk 3 can be selected according to the diameter of the device, the processing capacity, and the separation target. The larger the device diameter, the greater the number and diameter of the holes; the greater the processing capacity, the greater the number of holes, while the diameter remains constant. For the separation of coarse particles with a diameter >50μm, a large diameter and a moderate number of holes can be selected; for the separation of fine particles with a diameter of 20~50μm, a small diameter and an increased number of holes can be selected. The hole diameter is mainly determined by the characteristics of the medium (solid content, viscosity, particle size) and anti-clogging requirements. For coarse particles with a solid content >8% and a particle size >50μm, a large diameter is selected, and the number of holes can be increased appropriately; for fine particles with a solid content <3% and a particle size of 20~50μm, a small diameter is selected, and the number of holes can be increased appropriately; for particles with a viscosity >5mPa... s, the orifice diameter can be selected to be 2~3mm larger than the conventional orifice diameter. In addition, the number of orifices and the orifice diameter of the inclined channel 3a must always meet the principle that the total flow area = 1.2~1.8 times the effective flow area of ​​the feed inlet 1b.

[0047] Please see Figure 3 and Figure 6 In one embodiment of the present invention, the rectifier plate 3 is also provided with a clearance hole 3b, and the end of the negative pressure pipe 2 away from the slurry pump passes through the clearance hole 3b and extends into the center of the second chamber 1a2 so that the suction port 2a communicates with the second chamber 1a2.

[0048] In this embodiment, the shape of the clearance hole 3b is adapted to the outer contour of the negative pressure pipe 2. A sealing element can be provided between the clearance hole 3b and the negative pressure pipe 2 to form a sealing fit, preventing the fluid in the first chamber 1a1 from directly entering the second chamber 1a2 through the gap between the clearance hole 3b and the negative pressure pipe 2 without being rectified by the inclined channel 3a, thus ensuring that all fluids are forcibly rectified by the inclined channel 3a.

[0049] The end of the negative pressure pipe 2 furthest from the slurry pump passes through the clearance hole 3b and extends downward to the center of the second chamber 1a2. The suction port 2a is located at the end of this extension, thus directly connecting the suction port 2a with the second chamber 1a2. This arrangement ensures that the suction force is in the same direction as gravity, guiding the fluid flow to the bottom of the centrifugal chamber 1a and resolving the force field cancellation problem. It should be noted that the central region of the second chamber 1a2 refers to the middle section of the second chamber 1a2 away from the top and bottom ends, and is not limited to half the height of the second chamber 1a2.

[0050] During the operation of the wastewater centrifuge device 100, the slurry pump creates a negative pressure suction effect in the centrifuge chamber 1a through the negative pressure pipe 2. This negative pressure suction effect creates a low-pressure zone at the suction port 2a, driving wastewater to enter the centrifuge chamber 1a from the feed port 1b and flow towards the suction port 2a. If the suction port 2a is located in the first chamber 1a1, the upward suction force generated by the negative pressure suction is opposite to the direction of gravity of the wastewater and large particles. The pressure difference driving force and gravity cancel each other out, and the downward flow trend of wastewater in the first chamber 1a1 is suppressed. This is not conducive to the wastewater accelerating through the rectifier plate 3 into the second chamber 1a2, and it is easy to cause fluid stagnation and turbulent eddies in the first chamber 1a1. After extending the negative pressure pipe 2 to the second chamber 1a2 and connecting the suction port 2a to the second chamber 1a2, the low-pressure zone of the negative pressure suction moves down to the second chamber 1a2. The sewage in the first chamber 1a1 flows downward naturally under the action of gravity and the upper fluid pressure. At the same time, the negative pressure suction in the second chamber 1a2 generates a downward suction pull on the first chamber 1a1. Gravity and pressure difference driving force are superimposed in the same direction, which promotes the sewage to enter the first chamber 1a1 and then accelerate through the rectifier plate 3 into the second chamber 1a2.

[0051] Although the first chamber 1a1 also exhibits vortices formed by the tangential inflow from the feed inlet 1b and some centrifugal separation, the vortices within the first chamber 1a1 have not yet undergone forced rectification by the rectifier disk 3, resulting in a high degree of turbulence in the flow field, weak and unstable swirling intensity, and insufficient centrifugal separation effect. Large particles and suspended solids are not sufficiently thrown towards the inner wall of the cylinder 1 within the first chamber 1a1, and a significant amount of solid suspended matter remains dispersed in the aqueous phase. If the suction port 2a of the negative pressure pipe 2 is directly connected to the first chamber 1a1, the negative pressure suction can easily draw in the insufficiently separated solid suspended matter along with the aqueous phase, leading to a reduction in the pre-separation effect.

[0052] The second chamber 1a2 is located below the rectifier plate 3. The fluid flowing through the rectifier plate 3 is forcibly rectified into a stable and orderly swirling flow field under the three-dimensional guidance of multiple inclined channels 3a. This swirling flow field continuously acts within the second chamber 1a2, resulting in a significantly better centrifugal separation effect than the first chamber 1a1. Under the action of the strong swirling flow field, large particles with higher density are efficiently thrown towards the inner wall of the centrifugal chamber 1a and converge downwards along the wall to the slag outlet 1c. The central region then gathers into a light liquid phase with a lower solid content. After the negative pressure pipe 2 extends into the second chamber 1a2, the suction port 2a is located in the central region of the swirling flow field. This region is the enrichment area of ​​the light liquid phase after centrifugal separation. The negative pressure suction mainly absorbs the light liquid phase in this region. Large particles, suspended solids, and other solids have been thrown away from the central region by centrifugal force, thereby effectively avoiding or reducing the intake of large particles, suspended solids, and other solids.

[0053] Please see Figure 3 and Figure 6In one embodiment of the present invention, a plurality of inclined channels 3a are arranged around the clearance hole 3b.

[0054] In this embodiment, the clearance hole 3b is located in the central region of the rectifier disk 3, and multiple inclined channels 3a are uniformly arranged around the clearance hole 3b in a circumferential direction, forming a ring array around the clearance hole 3b. This arrangement ensures that after the negative pressure pipe 2 passes through the clearance hole 3b and extends into the second chamber 1a2, its suction port 2a is naturally located near the central axis of the second chamber 1a2. The inclined channels 3a are arranged around the clearance hole 3b so that the swirling flow field after rectification by each inclined channel 3a is symmetrically distributed around the clearance hole 3b, and the central axis of the swirling flow coincides with or approximately coincides with the central axis of the cylinder 1 and the central axis of the negative pressure pipe 2.

[0055] Within the second chamber 1a2, the area near the inner wall of the centrifugal chamber 1a is a high-pressure, high-speed zone, where larger particles with higher density are thrown towards this zone and move along the wall under centrifugal force. The area near the central axis is a low-pressure, low-speed zone, where lighter liquid phases with lower density converge. Multiple inclined channels 3a are arranged around the avoidance hole 3b, ensuring that the central region of the swirling flow field is located directly below the avoidance hole 3b. After the negative pressure pipe 2 passes through the avoidance hole 3b, its suction port 2a is located in this central region, thus ensuring that the negative pressure pipe 2 is located in the central region of the second chamber 1a2 for suction.

[0056] When the suction port 2a of the negative pressure pipe 2 is located in the central region of the second chamber 1a2, the suction range is in the light liquid phase enrichment zone of the swirling flow field. This region is far from the inner wall of the centrifugal chamber 1a and is surrounded by the rotating liquid flow. The large-sized heavy phase solid particles moving against the wall are constrained near the wall surface under the action of centrifugal force, making it difficult for them to cross the main swirling region and reach the vicinity of the central axis. Therefore, during the negative pressure suction process, the area around the suction port 2a is mainly composed of light liquid phase separated by centrifugation, effectively avoiding the intake of large-sized heavy phase solid particles attached to the surrounding wall, and ensuring that the fluid entering the negative pressure pipe 2 has a low solid content and stable water quality.

[0057] Furthermore, multiple guide tubes 31 can be formed on the side of the rectifier disk 3 facing the second chamber 1a2. Each guide tube 31 corresponds to an inclined channel 3a. The inner cavity of the guide tube 31 is connected to and coaxially arranged with the corresponding inclined channel 3a. The guide tube 31 can extend the inclined channel 3a without increasing the thickness of the rectifier disk 3, saving material. The guide tubes 31 also provide further guidance and constraint for the fluid flowing out of each inclined channel 3a, ensuring that the fluid maintains its predetermined flow direction and velocity components after exiting the inclined channel 3a. This prevents premature interference between fluids from different channels at the outlet of the rectifier disk 3, ensuring that each fluid enters the second chamber 1a2 and converges with preset tangential and axial components. This helps maintain the stability of the swirling flow field and enhances the centrifugal separation effect. The length of the guide tube 31 can be adjusted according to the thickness of the rectifier disk 3 and the flow field rectification requirements. While meeting structural strength requirements, the length can be appropriately adjusted to adapt to different swirling intensity requirements.

[0058] It should also be noted that, to ensure that the negative pressure pipe 2 does not adsorb the solid phase in the outer swirling flow, the key dimensions of the negative pressure pipe 2 and the cylinder 1 need to be designed in a coordinated manner. The main control factors include the radial distance from the outer wall of the negative pressure pipe 2 to the inner wall of the cylinder 1, the axial distance from the suction port of the negative pressure pipe 2 to the cone bottom and slag outlet 1c of the cylinder 1, and the fixed thickness of the outer swirling flow layer. For example, in the radial design, the radial distance from the inner wall of the cylinder 1 to the outer wall of the negative pressure pipe 2 should be greater than the stable thickness of the outer swirling flow layer, providing sufficient and undisturbed annular flow space for the heavy phase of the outer swirling flow moving along the wall, ensuring that the solid phase of the outer swirling flow only moves downward along the cylinder wall and does not diffuse towards the central area; in the axial design, the suction port of the negative pressure pipe 2 should be set in the center of the second chamber 1a2, maintaining a sufficient safe distance from the cone bottom of the cylinder 1, the sludge storage tank, and the slag outlet 1c area, to prevent the bottom deposited sludge from being directly sucked in due to excessive distance.

[0059] Please see Figures 1 to 3 In one embodiment of the present invention, the axial direction of the negative pressure pipe 2 is collinear with the axial direction of the cylinder 1; and / or, the axial direction of the feed port 1b is perpendicular to the radial direction of the cylinder 1.

[0060] In this embodiment, the axial direction of the negative pressure pipe 2 is collinear with that of the cylinder 1, meaning the central axis of the negative pressure pipe 2 coincides with the central axis of the cylinder 1. The negative pressure pipe 2 extends downward from the top wall along the central axis of the cylinder 1, passes through the clearance hole 3b of the rectifier plate 3, and enters the second chamber 1a2. This arrangement places the negative pressure pipe 2 in a completely centrally symmetrical position within the centrifugal chamber 1a. The suction port 2a is located on the central axis of the cylinder 1, coinciding with the theoretical central axis of the swirling flow field. Ideally, the swirling flow field is symmetrically distributed with the central axis of the cylinder 1 as the axis of rotation. When the negative pressure pipe 2 and the cylinder 1 are axially collinear, the suction port 2a is precisely in the optimal position in the central region of the swirling flow, maximizing the suction of the light liquid phase that converges at the center after centrifugal separation, while minimizing its distance from the heavy phase large-sized solid particles moving along the wall.

[0061] The axial direction of the inlet 1b is perpendicular to the radial direction of the cylinder 1. That is, the central axis of the inlet 1b is perpendicular to the radial direction at the corresponding position on the cylinder 1, and the central axis of the inlet 1b is parallel to the tangential direction of the cylinder 1 at that point. This arrangement allows wastewater to enter the first chamber 1a1 tangentially, with the inflow direction aligned with the tangential direction of the inner wall of the cylinder 1. The inflow does not generate a radial component; the wastewater enters tangentially along the inner wall of the cylinder 1, flowing along the wall and gradually forming a stable circumferential rotation. The development of the vortex is smoother, providing favorable initial flow field conditions for the subsequent rectification and swirl enhancement by the rectifying disk 3. If the axial direction of the inlet 1b forms an angle with the radial direction of the cylinder 1 instead of being perpendicular, the inflow will have a radial component. Some fluid will directly rush towards the central region or inner wall of the cylinder 1, leading to turbulent vortex structure, increased energy loss, and reduced swirl formation efficiency.

[0062] Please see Figure 1 and Figure 3 In one embodiment of the present invention, the sewage centrifuge device 100 further includes a slag discharge pipe 5, which is provided with a slag discharge valve 51; the slag discharge pipe 5 is connected to the slag storage tank 4 and the inner cavity of the slag discharge pipe 5 is in communication with the slag storage chamber 4a.

[0063] In this embodiment, the slag discharge pipe 5 is a hollow tubular structure. One end of it is connected to the bottom or lower side wall of the slag storage tank 4, and the other end extends to the outside of the slag storage tank 4. It is used to discharge large-sized particles collected in the slag storage cavity 4a to the outside of the wastewater centrifuge device 100. The connection between the slag discharge pipe 5 and the slag storage tank 4 can be welding, flange connection, or threaded connection, etc. A sealing gasket or sealing ring can be set at the connection to prevent slurry leakage. The inner cavity of the slag discharge pipe 5 is directly connected to the slag storage cavity 4a, forming a channel for the discharge of large-sized particles from the slag storage tank 4 to the outside.

[0064] A slag discharge valve 51 is installed on the slag discharge pipe 5 to control the opening and closing state of the inner cavity of the slag discharge pipe 5. When the slag discharge valve 51 is closed, the inner cavity of the slag discharge pipe 5 is cut off, and the slag storage chamber 4a forms a closed slag collection space. Large-sized particles are deposited and stored in the slag storage chamber 4a, and the wastewater centrifuge device 100 can continuously carry out separation operations without interruption. When the slag discharge valve 51 is open, large-sized particles in the slag storage chamber 4a are discharged through the slag discharge pipe 5 to a designated collection container or subsequent treatment equipment under the action of gravity or external flushing water.

[0065] The installation of the slag discharge pipe 5 allows the wastewater centrifuge 100 to clean and discharge the slag storage tank 4 without shutting down and disassembling, thus improving the continuous operation capability of the device. Compared to the method of cleaning the slag storage tank 4 by completely disassembling it without the slag discharge pipe 5, the structure of the slag discharge pipe 5 in conjunction with the slag discharge valve 51 makes the slag discharge operation more convenient and efficient, reduces labor intensity, and increases equipment utilization. In working conditions such as mine roadways where space is limited and maintenance conditions are poor, the advantages of this structure are particularly prominent. Maintenance personnel can complete the slag discharge without removing the slag storage tank 4 from the cylinder 1, reducing maintenance workload and downtime.

[0066] Please see Figure 1 and Figure 3 In one embodiment of the present invention, the wastewater centrifuge device 100 further includes a control unit and a sludge interface meter 6. The sludge interface meter 6 is used to sense the height of the sediment in the sludge storage tank 4. The sludge discharge valve 51 is an electric valve, and both the sludge discharge valve 51 and the sludge interface meter 6 are electrically connected to the control unit.

[0067] In this embodiment, the sludge interface meter 6 is used to sense the height of the sludge in the sludge storage tank 4. Its sensing probe 61 can be located at the top of the sludge storage tank 4 or at the sludge outlet 1c to obtain the position information of the solid-liquid interface in the sludge storage cavity 4a. The sludge interface meter 6 can be optical, ultrasonic, or capacitive, etc.

[0068] The slag discharge valve 51 is an electric valve, driven by an electric actuator. The electric actuator can be an electric push rod, an electric gearbox, or an electric worm gear mechanism. After receiving an electrical signal, the electric actuator drives the valve core to rotate or move, thereby opening and closing the slag discharge valve 51.

[0069] The control unit can be a programmable logic controller (PLC), a microcontroller control board, or an industrial control computer. The control unit has signal input and signal output interfaces. The signal input interface is electrically connected to the sludge interface meter 6 to receive the sediment height detection signal transmitted by the sludge interface meter 6. The signal output interface is electrically connected to the electric valve to send opening or closing control commands to the electric valve. The control unit can also be further electrically connected to the slurry pump to control the start / stop or speed adjustment of the slurry pump, achieving coordinated operation between the separation and sludge discharge stages.

[0070] During the separation stage, the control unit keeps the electric valve closed, the slurry pump runs continuously, and wastewater enters the centrifuge chamber 1a through the inlet 1b for separation. Larger particles enter the sludge storage chamber 4a through the sludge outlet 1c for sedimentation and storage. The sludge interface meter 6 senses the sludge height in the storage tank 4 in real time. When the sludge height rises to the set high threshold, the sludge interface meter 6 sends a trigger signal to the control unit, which then sends an opening command to the electric valve. The electric valve opens, and the larger particles in the storage chamber 4a are discharged through the sludge discharge pipe 5 under gravity. The control unit can simultaneously send a pause command to the slurry pump or keep the pump running to utilize negative pressure to assist in sludge discharge. The specific control strategy can be set according to the sludge discharge efficiency and process requirements. When the sludge interface meter 6 senses that the sludge height has dropped to the set low threshold, it sends a reset signal to the control unit, which then sends a close command to the electric valve. The sludge discharge stage ends, and the wastewater centrifuge 100 re-enters the separation stage.

[0071] In this way, the slag discharge operation requires no manual intervention, achieving precise judgment of the timing of slag discharge and automatic execution of the process. Compared to timed slag discharge, slag discharge based on the real-time sensing of sludge height by the sludge interface meter 6 avoids frequent start-ups and shutdowns and energy waste caused by discharging before the sludge storage chamber 4a is full, and also avoids solid phase overflow and deterioration of separation effect caused by the sludge storage chamber 4a being too full. Compared to manually observing and judging the timing of slag discharge, automated control reduces interference from human factors, makes the timing of slag discharge more accurate, and significantly reduces labor intensity, making it particularly suitable for working conditions such as underground mines where personnel inspection is inconvenient or unattended operation is required.

[0072] Please see Figure 3 In one embodiment of the present invention, the first chamber 1a1 is cylindrical and the second chamber 1a2 is conical and gradually shrinks along the direction from the rectifier plate 3 to the slag outlet 1c.

[0073] In this embodiment, the first chamber 1a1 is located above the rectifier disk 3. Its chamber wall is formed by the inner wall of the upper cylindrical section of the cylinder 1, and its cross-sectional shape is circular with a consistent cross-sectional area at all points along the axial direction, forming a cylindrical chamber with a uniform cross-section. Thus, after the sewage enters tangentially through the inlet 1b, it forms a stable circumferential vortex under the constraint of the cylindrical chamber wall. The rotation radius of the vortex is basically consistent at each axial position, and the flow field structure is regular, which is conducive to the uniform distribution of the vortex to each inclined channel 3a at the rectifier disk 3.

[0074] The second chamber 1a2 is located below the rectifier disk 3. Its chamber wall is formed by the inner wall of the lower conical section of the cylinder 1. The cross-sectional shape is circular and gradually decreases along the direction from the rectifier disk 3 to the slag outlet 1c, forming a conical cavity that contracts downwards along the axial direction. Thus, as the swirling flow field moves downwards, the radius of rotation gradually decreases. According to the principle of conservation of angular momentum, the circumferential rotational speed of the fluid increases accordingly, the swirling intensity is enhanced, and the centrifugal separation effect becomes more significant. Simultaneously, the conical chamber wall guides and converges large particles. Large particles thrown towards the chamber wall by centrifugal force slide downwards along the wall surface, constrained by the gradually contracting chamber wall. The radial distance towards the central axis gradually decreases, eventually converging at the slag outlet 1c, where the bottom dimension is smallest. The slag discharge path is smooth, and large particles are less likely to accumulate on the chamber wall or at the bottom.

[0075] To accommodate the shape of the internal chamber, the upper outer contour of the cylinder 1 can be a cylindrical section, and the lower outer contour can be a conical section. The cylindrical and conical sections can be integrally formed, or they can be separately machined and then welded or connected by flanges. When it is a separate structure, a stepped surface or support ring can be formed at the connection between the cylindrical and conical sections to support and fix the rectifier disk 3. The outer periphery of the rectifier disk 3 is sealed to the stepped surface or support ring. The cylinder 1 can be made of corrosion-resistant materials such as stainless steel.

[0076] Therefore, in this embodiment, the cylindrical arrangement of the first chamber 1a1 and the conical contraction arrangement of the second chamber 1a2 are combined to stabilize the development of the vortex, significantly enhance the swirling flow, and ensure smooth sludge discharge and aggregation, thereby synergistically improving the separation efficiency and sludge discharge reliability of the sewage centrifuge device 100.

[0077] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A wastewater centrifuge device, characterized in that, include: A cylindrical body is used to be submerged in sewage. A centrifugal chamber is formed inside the cylindrical body. A feed inlet communicating with the centrifugal chamber is formed on the side wall of the cylindrical body. The axial direction of the feed inlet is set at an angle to the radial direction of the cylindrical body. A slag outlet is also provided on the bottom wall of the cylindrical body. A negative pressure pipe is provided on the top wall of the cylinder, and one end of the negative pressure pipe is used to connect to a slurry pump; A rectifier plate, fixedly disposed within the centrifugal chamber, divides the centrifugal chamber into a first chamber and a second chamber distributed along the axial direction of the cylinder. The feed inlet communicates with the first chamber, and the slag outlet communicates with the second chamber. One end of the negative pressure pipe, away from the slurry pump, extends into the second chamber and forms a suction port communicating with the inner cavity of the negative pressure pipe. The rectifier plate has multiple inclined channels connecting the first and second chambers, arranged in the same direction along the circumference of the rectifier plate to create a swirling flow field after the fluid passes through it. A slag storage tank is connected to the cylinder, and a slag storage cavity is formed inside the slag storage tank that communicates with the slag outlet.

2. The wastewater centrifuge device as described in claim 1, characterized in that, The axial direction of the inclined channel forms a first angle with the axial direction of the cylinder, and the first angle is α, where 0° < α < 90°; The projection of the axial direction of the inclined channel onto a plane perpendicular to the axial direction of the cylinder forms a second angle with the radial direction of the cylinder, the second angle being β, where 0° < β ≤ 90°.

3. The wastewater centrifuge device as described in claim 2, characterized in that, The rectifier disk extends in a direction perpendicular to the axial direction of the cylinder.

4. The wastewater centrifuge device as described in claim 1, characterized in that, The total flow area of ​​the plurality of inclined channels is S1, and the flow area of ​​the feed inlet is S2, where 1.2 ≤ S1 / S2 ≤ 1.

8.

5. The wastewater centrifuge device as described in claim 1, characterized in that, The rectifier plate is also provided with a clearance hole. The end of the negative pressure pipe away from the slurry pump passes through the clearance hole and extends into the center of the second chamber so that the suction port communicates with the second chamber.

6. The wastewater centrifuge device as described in claim 5, characterized in that, Multiple inclined channels are arranged around the clearance hole.

7. The wastewater centrifuge device as described in claim 1, characterized in that, The axial direction of the negative pressure pipe is collinear with the axial direction of the cylinder. And / or, the axial direction of the feed inlet is perpendicular to the radial direction of the cylinder.

8. The wastewater centrifuge apparatus according to any one of claims 1 to 7, characterized in that, The wastewater centrifuge device also includes a slag discharge pipe, which is equipped with a slag discharge valve; The slag discharge pipe is connected to the slag storage tank, and the inner cavity of the slag discharge pipe is in communication with the slag storage tank.

9. The wastewater centrifuge device as described in claim 8, characterized in that, The wastewater centrifuge device also includes a control unit and a sludge interface instrument, the sludge interface instrument being used to sense the height of the sediment in the sludge storage tank; The sludge discharge valve is an electric valve, and both the sludge discharge valve and the sludge interface meter are electrically connected to the control unit.

10. The wastewater centrifuge apparatus according to any one of claims 1 to 7, characterized in that, The first chamber is cylindrical, and the second chamber is conical and gradually narrows along the direction from the rectifier plate to the slag outlet.

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