Centrifugal machine for sewage treatment

Abstract

The invention relates to the field of sewage treatment equipment, in particular to a sewage treatment centrifugal machine which comprises a centrifugal machine body, the centrifugal machine body comprises a mounting outer shell, a rotary drum is rotationally arranged in the mounting outer shell, a spiral conveyor is rotationally arranged in the rotary drum, and a plurality of strip-shaped through holes used for discharging sewage are formed in the side wall of one end of the rotary drum; a sealing cover plate is arranged at the end, where the strip-shaped through hole is located, of the rotary drum, and a water outlet is formed in the sealing cover plate. A sealing plate is rotationally arranged in the sealing cover plate, a plurality of water blocking mechanisms are arranged on the sealing plate, and each water blocking mechanism comprises a plurality of sealing plate through holes. The sealing plate is driven by the sealing plate driving motor to rotate, the sealing plate through holes corresponding to the strip-shaped through holes can be switched in real time in the equipment operation process, the water outlet height is adjusted, and the treatment process does not need to be interrupted. The real-time adjusting capability enables the equipment to quickly respond to dynamic changes of solid content and flow of sewage, and the problem that traditional equipment cannot adapt to dynamic working conditions is perfectly solved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment equipment, and more specifically, to a centrifuge for wastewater treatment. Background Technology

[0002] Centrifuges for wastewater treatment are core equipment for solid-liquid separation in wastewater. They use centrifugal force generated by high-speed rotation to separate solid particles from liquid in suspension, and are widely used in municipal wastewater, industrial wastewater, and sludge dewatering. Taking a horizontal screw centrifuge as an example, its core structure includes a drum, a screw conveyor, and a drive system: the drum and screw rotate in the same direction at a certain differential speed. After the wastewater enters through the inlet, under the action of centrifugal force, the denser solid particles settle to the inner wall of the drum to form a filter cake, which is then pushed to the discharge port by the screw. The separated liquid is discharged from the machine through the overflow weir plate (i.e., the outlet) at the end of the drum.

[0003] The separation efficiency of a centrifuge is closely related to the thickness of the liquid ring (the thickness of the annular region formed by the liquid inside the drum). The thickness of the liquid ring is determined by the outlet height. Raising the outlet (thinning the liquid ring) can enhance the centrifugal force field, increase the settling velocity of solid particles and the clarity of the clear liquid, but it will reduce the throughput and may cause the loss of fine particles. Lowering the outlet (thickening the liquid ring) can increase the liquid capacity and improve the throughput, but it may lead to an increase in the solid moisture content or material loss due to the weakening of centrifugal force.

[0004] In actual wastewater treatment, the solids content, particle size distribution, and treatment capacity requirements of wastewater often change dynamically with operating conditions. For example, during heavy rain, the solids content of wastewater surges, requiring an increase in the liquid ring thickness to improve treatment capacity; while in the biological treatment stage, the liquid ring thickness needs to be reduced to enhance fine particle settling and sludge dewatering. Therefore, flexible adjustment of the effluent height is key to optimizing the separation effect.

[0005] Although centrifuges for wastewater treatment have made significant progress in solid-liquid separation, the overflow weir height of traditional centrifuges is usually fixed at the factory or can only be adjusted to a limited extent through mechanical disassembly (such as replacing weirs of different heights). This method requires shutdown and the adjustment range is limited by the preset weir specifications, making it impossible to respond in real time to dynamic fluctuations in wastewater quality and flow rate. For example, when the solid content of wastewater increases, a fixed-height outlet may result in an excessively thin liquid ring, leading to solid discharge blockage or the risk of material leakage. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution.

[0007] A centrifuge for wastewater treatment includes a centrifuge body, which includes a mounting shell. A rotating drum is rotatably disposed within the mounting shell, and a screw conveyor is rotatably disposed within the rotating drum. The outer wall of the screw conveyor is provided with screw blades. One end of the rotating drum is provided with a slag discharge port, and the side wall of the other end of the rotating drum is provided with a plurality of strip-shaped through holes for discharging wastewater. The strip-shaped through holes are arranged radially along the rotating drum. A sealing cover plate is provided at the end of the rotating drum where the strip-shaped through holes are located, and a drain outlet is provided at the sealing cover plate. A sealing plate is rotatably disposed within the sealing cover plate, and the sealing plate is provided with a plurality of water-blocking mechanisms. Each water-blocking mechanism includes a plurality of sealing plate through holes, which are spaced apart along the length of the strip-shaped through holes and radially offset along the side wall of the rotating drum. The sealing plate through holes are used to rotate to the strip-shaped through holes so that wastewater flows out from the sealing plate through holes.

[0008] As a preferred embodiment of the present invention, a sealing plate drive motor is provided at the end face of the sealing cover away from the strip-shaped through hole, and the rotating shaft of the sealing plate drive motor passes through the sealing cover and is connected to the sealing plate.

[0009] As a preferred embodiment of the present invention, the sealing cover is provided with a sealing mechanism for the sealing plate drive motor. The sealing mechanism includes a sleeve disposed at the sealing cover, the end of the sleeve extending out of the mounting housing, and a sleeve cover for sealing the opening of the sleeve at the end of the sleeve extending out of the mounting housing.

[0010] As a preferred embodiment of the present invention, the centrifuge body further includes a power supply mechanism for supplying power to the sealing plate drive motor. The power supply mechanism includes two conductive rings disposed at the sleeve cover plate. A first conductive post is disposed at the conductive ring. The end of the first conductive post extends through the sleeve cover plate and into the sleeve. The end of the first conductive post is used for electrical connection with the cable of the sealing plate drive motor. The power supply mechanism also includes a mounting plate. The mounting plate is provided with a conductive post mounting through hole. A second conductive post is slidably disposed in the conductive post mounting through hole. An insulating sealing cover is provided at the mounting plate covering the second conductive post. The end of the second conductive post extends out of the insulating sealing cover and is used for connection with an external power source. The sidewall of the second conductive post expands outward to form a flange located in the insulating sealing cover. A spring is provided in the insulating sealing cover, which is sleeved on the second conductive post and used to abut the end of the second conductive post against the conductive ring.

[0011] As a preferred embodiment of the present invention, the side wall of the screw conveyor is provided with a conveyor opening, and the inner cavity of the screw conveyor is provided with two baffles. The two baffles are respectively located at the two ends of the conveyor opening. The two baffles and the inner cavity of the screw conveyor form a separation cavity. The screw conveyor is provided with a water inlet pipe, and one end of the water inlet pipe extends into the separation cavity.

[0012] As a preferred embodiment of the present invention, the other end of the water inlet pipe extends out of the drum, and the end of the water inlet pipe extending out of the drum is provided with a first drive wheel. The centrifuge body includes a water inlet pipe drive motor, and a first drive wheel is provided at the shaft of the water inlet pipe drive motor. A first transmission belt is provided between the first drive wheel and the first drive wheel.

[0013] As a preferred embodiment of the present invention, the end of the water inlet pipe extending out of the drum is also provided with a rotary joint.

[0014] As a preferred embodiment of the present invention, the end of the drum where the slag discharge port is located extends out of the mounting housing, and the end of the drum that extends out of the mounting housing is provided with a second drive wheel. The centrifuge body includes a drum drive motor, and a second drive wheel is provided at the shaft of the drum drive motor. A second transmission belt is provided between the second drive wheel and the second drive wheel.

[0015] As a preferred embodiment of the present invention, the mounting housing includes an upper housing and a lower housing, and the upper housing and the lower housing are bolted together.

[0016] As a preferred embodiment of the present invention, the mounting housing is provided with a slag discharge through hole located below the slag discharge port, and the mounting housing is provided with a drainage through hole located below the drain outlet.

[0017] The beneficial effects of this invention are as follows: This invention uses a motor to drive the sealing plate to rotate, allowing for real-time switching of the sealing plate's through-holes corresponding to the strip-shaped through-holes during equipment operation. This enables adjustment of the effluent height without interrupting the treatment process. This real-time adjustment capability allows the equipment to quickly respond to dynamic changes in wastewater solids content and flow rate, perfectly solving the problem of traditional equipment's inability to adapt to dynamic operating conditions.

[0018] This invention allows for flexible adjustment of the outlet height. When high clarity is required, the outlet height is lowered to reduce the thickness of the liquid ring and enhance the centrifugal force field; when high throughput is required, the outlet height is raised to increase the thickness of the liquid ring and expand the liquid capacity.

[0019] This invention completely isolates the sealing plate drive motor from the sewage environment through a sealing mechanism, avoiding failure of the sealing plate drive motor caused by sewage leakage and water vapor erosion, and solving the problem of traditional adjustment components being easily contaminated. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the centrifuge used for wastewater treatment in Example 1; Figure 2 This is a cross-sectional view of the centrifuge used for wastewater treatment in Example 1; Figure 3 This is a cross-sectional view of the centrifuge used for wastewater treatment in Example 1; Figure 4 This is a schematic diagram of the structure of the drum in Example 1; Figure 5 This is a schematic diagram of the sealing plate in Example 1; Figure 6 This is a half-sectional view of the sealing cover plate in Example 1; Figure 7 for Figure 3 Enlarged view of section A; Figure 8 This is a side view of the centrifuge used for wastewater treatment in Example 1.

[0021] The attached figures are labeled as follows: 100. Centrifuge body; 110. Mounting outer casing; 111. Upper casing; 112. Lower casing; 120. First drive wheel; 130. Water inlet pipe drive motor; 140. First drive wheel; 150. First transmission belt; 210. Rotary drum; 220. Screw conveyor; 221. Screw blades; 230. Slag discharge port; 240. Strip-shaped through hole; 250. Sealing cover plate; 260. Drain outlet; 270. Sealing plate; 280. Sealing plate drive motor; 290. Sleeve; 2100. Conveyor opening; 2110. Baffle. 2120 Water plate; 2130 Separation chamber; 2140 Water inlet pipe; 2150 Rotary joint; 2160 Slag discharge through hole; 510 Sealing plate through hole; 520 Sleeve cover plate; 610 Conductive ring; 620 First conductive post; 630 Mounting plate; 640 Conductive post mounting through hole; 650 Second conductive post; 660 Insulating sealing cover; 670 Flange; 680 Spring; 710 Second drive wheel; 720 Drum drive motor; 730 Second drive wheel; 740 Second transmission belt. Detailed Implementation

[0022] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.

[0023] Example 1, combined with Figures 1 to 8 As shown in the figure, this embodiment provides a centrifuge for wastewater treatment. Its core design aims to solve the technical problem that traditional centrifuges cannot adapt to dynamic working conditions due to the fixed or inconvenient height of the outlet.

[0024] The main structure of this wastewater treatment centrifuge is the centrifuge body 100, which serves as the basic load-bearing unit and integrates all functional components. Its outermost layer is the mounting shell 110, which adopts a split design, consisting of an upper shell 111 and a lower shell 112, which are detachably connected by bolts. The significant advantage of this design is that when internal components require inspection, maintenance, or replacement, the upper shell 111 and lower shell 112 can be quickly separated by removing the bolts. This avoids the restrictive enclosure of internal components inherent in traditional one-piece shells, significantly reducing operational difficulty and greatly improving the ease of equipment maintenance.

[0025] The interior of the housing 110 is the core separation area, in which a rotating drum 210 is rotatably mounted. As the core working component of the centrifugal separation, the inner wall of the drum 210 forms an annular liquid film region (i.e., a liquid ring) for solid-liquid separation due to centrifugal force during high-speed rotation. The thickness of the liquid ring directly affects the separation effect. A screw conveyor 220 is coaxially mounted inside the drum 210. Its outer wall has helical blades 221 evenly distributed axially. The edges of the helical blades 221 maintain a small gap with the inner wall of the drum 210, which avoids direct friction while ensuring effective pushing of solid particles settling on the inner wall of the drum 210, achieving solid discharge after solid-liquid separation.

[0026] One end of the drum 210 (usually the smaller diameter end) is provided with a slag discharge port 230, which serves as the final discharge channel for solid particles. The diameter of the slag discharge port 230 is designed to match the processing capacity of the drum, ensuring that the dewatered solid particles (such as sludge) can be discharged smoothly without clogging.

[0027] On the other end (usually the larger diameter end) of the drum 210, several strip-shaped through holes 240 are evenly distributed circumferentially. These strip-shaped through holes 240 are the main discharge channels for the separated clarified liquid and are arranged radially along the drum 210. The advantage of the radial design is that when the drum 210 rotates at high speed, the clarified liquid moves radially outward under the action of centrifugal force. The radially arranged strip-shaped through holes 240 can be aligned with the direction of liquid movement, reducing discharge resistance and improving drainage efficiency.

[0028] To achieve precise control over the discharge height of the clear liquid, a sealing cover plate 250 is fixedly installed at one end of the strip-shaped through-hole 240 on the drum 210. The sealing cover plate 250 is a circular plate structure, and its edge is sealed to the end of the drum 210 to ensure that the liquid inside the drum 210 can only be discharged through the preset channel, preventing leakage. A drain outlet 260 is provided in the central area of ​​the sealing cover plate 250, serving as the final channel for the clear liquid discharge device.

[0029] A sealing plate 270 is rotatably mounted on the inner side of the sealing cover 250 (the side closest to the strip-shaped through-hole 240). The sealing plate 270 is connected to the sealing cover 250 via bearings to ensure stability and sealing during rotation. The sealing plate 270 has several sets of water-blocking mechanisms, each corresponding to a strip-shaped through-hole 240 on the drum. Each set of water-blocking mechanisms includes several sealing plate through-holes 510. These sealing plate through-holes 510 are spaced apart along the length of the strip-shaped through-hole 240 and radially offset along the sidewall of the drum 210. "Radial offset" means that the centers of different sealing plate through-holes 510 are at different positions in the radial direction of the drum. This design is the core of achieving water outlet height adjustment. When the sealing plate 270 rotates, the sealing plate through-holes 510 at different radial positions will sequentially correspond to the strip-shaped through-hole 240, allowing sewage to flow out from the sealing plate through-holes 510 at different heights, thus achieving water outlet height adjustment.

[0030] To drive the sealing plate 270 to rotate and achieve the function of adjusting the water outlet height, a sealing plate drive motor 280 is fixedly installed on the end face of the sealing cover plate 250 away from the strip-shaped through hole 240. The sealing plate drive motor 280 is preferably a servo motor, which features precise speed and rapid response, and can achieve precise positioning of the sealing plate 270 by controlling the rotation angle. The shaft of the sealing plate drive motor 280 passes through the central through hole of the sealing cover plate 250 and is fixedly connected to the center position of the sealing plate 270, ensuring that the rotational motion of the motor can be directly transmitted to the sealing plate 270, achieving precise correspondence between the different sealing plate through holes 510 and the strip-shaped through hole 240.

[0031] Since the sealing cover 250 is close to the liquid discharge area of ​​the drum 210, a special sealing mechanism is provided at the sealing cover 250 to prevent sewage or water vapor from entering the sealing plate drive motor 280 and affecting its service life and stability. This sealing mechanism includes a sleeve 290 fixed to the outside of the sealing cover 250. The sleeve 290 is a cylindrical structure with one open end, one end of which is sealed to the outer wall of the sealing cover 250, and the other end extends out of the mounting housing 110, completely enclosing the sealing plate drive motor 280 to form an independent sealed space. A sleeve cover plate 520 is also provided at the end of the sleeve 290 extending out of the mounting housing 110, and the sleeve cover plate 520 is fixedly connected to the end of the sleeve 290 by bolts.

[0032] To ensure stable power supply to the sealing plate drive motor 280 during rotation (since the sleeve 290 rotates synchronously with the drum 210), the centrifuge body 100 also includes a power supply mechanism. This power supply mechanism includes two conductive rings 610 (corresponding to the positive and negative terminals of the power supply, respectively) disposed on the outer end face of the sleeve cover plate 520. The conductive rings 610 are annular structures, coaxially arranged with the sleeve cover plate 520, and rotate synchronously with the sleeve 290. A first conductive post 620 is provided at each conductive ring 610, one end of which is electrically connected to the conductive ring, and the other end extends through the sleeve cover plate 520 into the sleeve 290. The end of the post is electrically connected to the cable of the sealing plate drive motor 280 via a wire, thus achieving circuit connection between the conductive ring 610 and the drive motor 280.

[0033] The power supply mechanism also includes a mounting plate 630 fixedly installed on the outside of the mounting housing 110, serving as a fixed base for the power supply mechanism. The mounting plate 630 has a conductive post mounting through hole 640, through which a second conductive post 650 is slidably mounted. One end of the second conductive post 650 extends out of the mounting plate 630 towards the sleeve cover plate 520, contacting the outer circumferential surface of the conductive ring 610, while the other end extends out of the other side of the mounting plate 630 for connection to an external power source. The mounting plate 630 has an insulating sealing cover 660 covering the second conductive post 650, made of insulating material, which prevents short circuits and avoids the ingress of external moisture. The sidewall of the second conductive post 650 expands outward to form a flange 670 located inside the insulating sealing cover 660, which is used to limit its sliding range. The insulating sealing cover 660 is also provided with a spring 680 sleeved on the second conductive post 650. One end of the spring 680 abuts against the flange 670 and the other end abuts against the inner wall of the insulating sealing cover 660. The elastic force keeps the end of the second conductive post 650 pressed against the conductive ring 610 to ensure continuous power supply during rotation.

[0034] To achieve stable introduction and preliminary separation of sewage, a conveyor opening 2100 is provided on the side wall of the screw conveyor 220. This opening is arranged along the axial direction of the screw conveyor 220 and serves as a channel for sewage to enter the drum 210 from inside the screw conveyor 220. Inside the cavity of the screw conveyor 220, a baffle plate 2110 is fixedly installed at each of the two ends of the conveyor opening 2100. The baffle plate 2110 is a circular plate structure and is sealed to the inner wall of the screw conveyor 220. Therefore, the two baffle plates 2110 and the inner cavity of the screw conveyor 220 together form an independent separation cavity 2120.

[0035] The separation chamber 2120 has a "pre-separation" function. Wastewater first enters the separation chamber 2120. When the screw conveyor 220 rotates, the wastewater in the separation chamber 2120 will initially form stratification due to centrifugal force. Larger solid particles settle to the inner wall of the separation chamber 2120 (i.e., the inner side wall of the screw conveyor 220) in advance, and then enter the main separation area of ​​the drum 210 through the conveyor opening 2100, reducing the load on the main separation area and improving the separation efficiency.

[0036] A water inlet pipe 2130 is also fixedly installed on the screw conveyor 220. One end of the pipe passes through the end of the screw conveyor 220 and extends into the separation chamber 2120, while the other end extends axially out of the drum 210 for connecting to an external sewage source. To ensure that the water inlet pipe 2130 can stably receive sewage during rotation, a rotary joint 2140 is provided at the end of the water inlet pipe 2130 extending out of the drum 210. Its fixed end is connected to an external sewage pipe, and its rotating end is fixedly connected to the water inlet pipe 2130. A mechanical seal structure is used to achieve sealed sewage transport during rotation, preventing leakage.

[0037] The inlet pipe 2130 is driven by an independent motor. Specifically, the inlet pipe 2130 has a first drive wheel 120 fixedly mounted on its end extending from the drum. An inlet pipe drive motor 130 is fixedly mounted on the mounting housing 110 of the centrifuge body 100. A first drive wheel 140 is fixedly mounted on its shaft. A first transmission belt 150 is fitted between the first drive wheel 120 and the first drive wheel 140. The rotation of the inlet pipe drive motor 130 drives the inlet pipe 2130 and the screw conveyor 220 to rotate synchronously via a transmission mechanism. The rotational speed can be independently adjusted by regulating the parameters of the inlet pipe drive motor 130.

[0038] The rotation of the drum 210 is controlled by an independent drive system, with the following specific structure: one end of the drum 210 with a slag discharge port 230 extends out of the mounting housing 110, and a second drive wheel 710 is fixedly sleeved on the extended end; a drum drive motor 720 is fixedly installed on the mounting housing 110 of the centrifuge body 100, and a second drive wheel 730 is fixedly sleeved on its shaft; a second transmission belt 740 is sleeved between the second drive wheel and the second drive wheel.

[0039] To facilitate the collection of separated solids and liquids, a slag discharge through-hole 2150 corresponding to the slag discharge port 230 is provided on the lower shell 112 of the mounting housing 110. A conveyor belt or collection tank can be connected below it, allowing solid particles discharged from the slag discharge port 230 to exit the equipment through the slag discharge through-hole 2150. Simultaneously, a drainage through-hole 2160 corresponding to the drain port 260 is also provided at the mounting housing 110. A drain pipe 2130 can be connected below it, allowing the clear liquid discharged from the drain port 260 to exit through the drainage through-hole 2160 and enter subsequent processing steps. The arrangement of the slag discharge through-hole 2150 and the drainage through-hole 2160 ensures the orderly discharge of solids and liquids during equipment operation, preventing accumulation inside the mounting housing 110 and affecting normal equipment operation.

[0040] The specific working principle of the wastewater treatment centrifuge in this embodiment is as follows: External sewage is connected to the rotary joint 2140 of the inlet pipe 2130 through a pipe, enters the interior of the inlet pipe 2130 through the rotary joint 2140, and is then transported along the inlet pipe 2130 to the separation chamber 2120 of the screw conveyor 220. At this time, the inlet pipe drive motor 130 starts, driving the inlet pipe 2130 and the screw conveyor 220 to rotate at a preset speed through the first drive wheel 140, the first transmission belt 150, and the first drive wheel 120.

[0041] Inside the separation chamber 2120, the centrifugal force generated by the rotation causes the solid particles (higher density) in the wastewater to settle towards the inner wall of the separation chamber 2120 (the inner wall of the screw conveyor 220), while the liquid (lower density) remains on the inner side, forming a preliminary solid-liquid stratification. After preliminary separation, the wastewater enters the annular space (main separation area) between the drum 210 and the screw conveyor 220 through the conveyor opening 2100, entering the next separation stage.

[0042] The drum drive motor 720 starts synchronously, and drives the drum 210 to rotate at a speed higher than that of the screw conveyor through the second drive wheel 730, the second transmission belt 740, and the second drive wheel 710, forming a stable speed difference between the two.

[0043] In the main separation zone, the powerful centrifugal force generated by high-speed rotation (centrifugal acceleration can reach hundreds to thousands of times the acceleration due to gravity) causes solid particles in the wastewater to settle further against the inner wall of the drum 210, forming a filter cake layer. Due to the speed difference between the screw conveyor 220 and the drum 210, the screw blades 221 continuously push the filter cake layer on the inner wall of the drum 210 toward the slag discharge port 230. During the pushing process, the filter cake layer is further squeezed and dehydrated, and finally discharged from the slag discharge port and collected through the slag discharge through-hole 2150 of the housing.

[0044] Meanwhile, the separated clear liquid (liquid part) moves towards the large diameter end of the drum 210 under the action of centrifugal force, reaches the area where the strip-shaped through hole 240 is set, and enters the space between the drum 210 and the sealing cover plate 250 through the strip-shaped through hole 240, waiting to be discharged.

[0045] After passing through the strip-shaped through-hole 240, the clear liquid needs to be discharged through the cooperation of the sealing cover plate 250 and the sealing plate 270. At this time, the sealing plate drive motor 280 drives the sealing plate 270 to rotate to a preset angle according to the sewage conditions (such as solids content and treatment volume requirements). The core adjustment logic is as follows: The sealing plate through holes 510 on the sealing plate 270 are radially staggered along the drum (i.e., different sealing plate through holes 510 are at different distances from the axis of the drum 210), corresponding to different water outlet heights. When the sealing plate rotates, the sealing plate through holes 510 at different radial positions will sequentially correspond to the strip through holes 240: When it is necessary to lower the outlet height (reduce the thickness of the liquid ring), the sealing plate 270 is rotated so that the sealing plate through hole 510, which is closer to the axis of the drum 210 (radially inward), aligns with the strip through hole 240. At this time, the clear liquid can only be discharged from the lower position, the thickness of the liquid ring inside the drum 210 becomes thinner, the centrifugal force field is enhanced, which can improve the settling velocity of solid particles and the clarity of the clear liquid. When it is necessary to increase the outlet height (increase the liquid ring thickness), the sealing plate 270 is rotated so that the sealing plate through hole 510, which is farther from the drum axis (radially outward), aligns with the strip through hole 240. At this time, the clear liquid can be discharged from the higher position, the liquid ring thickness inside the drum 210 increases, the liquid holding volume expands, and the sewage treatment capacity can be increased.

[0046] The regulated clear liquid enters the drain port 260 of the sealing cover through the sealing plate through hole 510, and is finally discharged through the drain through hole 2160 of the housing, completing the entire separation process.

[0047] Traditional wastewater treatment centrifuges (such as horizontal screw centrifuges) have significant limitations in practical applications, mainly in the following aspects: Outdated outlet adjustment methods: The overflow weir height of traditional centrifuges is mostly a fixed value, or can only be adjusted by stopping the machine and replacing the weir with one of different height. This method requires interrupting equipment operation, and the adjustment range is limited by the preset weir specifications, making it unable to adapt to dynamic changes in wastewater solids content and flow rate. Traditional equipment requires shutdown to replace the weir plate. In this embodiment, the sealing plate 270 is rotated by a motor 280 driven by the sealing plate, allowing real-time switching of the sealing plate through-hole 510 corresponding to the strip-shaped through-hole 240 during equipment operation, thus adjusting the effluent height without interrupting the treatment process. This real-time adjustment capability enables the equipment to quickly respond to dynamic changes in sewage solids content and flow rate, perfectly solving the problem that traditional equipment cannot adapt to dynamic operating conditions.

[0048] By flexibly adjusting the outlet height, when high clarity is required, the outlet height is lowered to reduce the thickness of the liquid ring and enhance the centrifugal force field; when high throughput is required, the outlet height is raised to increase the thickness of the liquid ring and expand the liquid capacity.

[0049] The sealing mechanism completely isolates the sealing plate drive motor 280 from the sewage environment, preventing malfunctions caused by sewage leakage and water vapor erosion, and solving the problem of easy contamination of traditional regulating components. The rotary power supply mechanism uses a spring 680 to ensure that the second conductive post 650 is always in contact with the rotating conductive ring 610, achieving stable power supply during rotation and avoiding regulation failure due to power interruption, thus ensuring the continuity and stability of the separation process.

[0050] In summary, the above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the present invention.

Claims

1. A centrifuge for sewage treatment, characterized by: The centrifuge body (100) comprises a mounting outer shell (110), a rotating drum (210) is arranged in the mounting outer shell (110), a spiral conveyor (220) is arranged in the rotating drum (210), a spiral blade (221) is arranged at the outer wall of the spiral conveyor (220), a slag discharge port (230) is arranged at one end of the rotating drum (210), a plurality of strip-shaped through holes (240) for discharging sewage are arranged at the side wall of the other end of the rotating drum (210), and the strip-shaped through holes (240) are arranged along the radial direction of the rotating drum (210); a sealing cover plate (250) is arranged at the end of the rotating drum (210) where the strip-shaped through holes (240) are arranged, and a water discharge port (260) is arranged at the sealing cover plate (250); a sealing plate (270) is arranged in the sealing cover plate (250), a plurality of groups of water blocking mechanisms are arranged at the sealing plate (270), each group of water blocking mechanisms comprises a plurality of sealing plate through holes (510), the plurality of sealing plate through holes (510) are arranged along the length direction of the strip-shaped through holes (240) and are arranged in a staggered manner along the radial direction of the side wall of the rotating drum (210), and the sealing plate through holes (510) are used to rotate to the strip-shaped through holes (240) to make the sewage flow out of the sealing plate through holes (510).

2. A centrifuge for sewage treatment according to claim 1, characterized in that: A sealing plate driving motor (280) is arranged at the end face of the sealing cover plate (250) away from the strip-shaped through holes (240), and the rotating shaft of the sealing plate driving motor (280) is connected with the sealing plate (270) through the sealing cover plate (250).

3. A centrifuge for sewage treatment according to claim 2, characterized in that: A sealing mechanism for sealing the sealing plate driving motor (280) is arranged at the sealing cover plate (250), the sealing mechanism comprises a sleeve (290) arranged at the sealing cover plate (250), the end portion of the sleeve (290) extends out of the mounting outer shell (110), and the end portion of the sleeve (290) extending out of the mounting outer shell (110) is provided with a sleeve cover plate (520) for sealing the opening of the sleeve (290).

4. A centrifuge for sewage treatment according to claim 3, characterized in that: The centrifuge body (100) further comprises a power supply mechanism for supplying power to the sealing plate driving motor (280), the power supply mechanism comprising two conductive rings (610) arranged at the sleeve cover plate (520), the conductive rings (610) being provided with first conductive columns (620), the ends of the first conductive columns (620) extending into the sleeve (290) through the sleeve cover plate (520); the ends of the first conductive columns (620) are used for electrically connecting with the cable of the sealing plate driving motor (280), the power supply mechanism further comprises a mounting plate (630), the mounting plate (630) being provided with a conductive column mounting through hole (640), a second conductive column (650) being slidably arranged in the conductive column mounting through hole (640), the mounting plate (630) being provided with an insulating sealing cover (660) covering the second conductive column (650), the end of the second conductive column (650) extending out of the insulating sealing cover (660), the end of the second conductive column (650) extending out of the insulating sealing cover (660) being used for connecting with an external power supply, the side wall of the second conductive column (650) expanding outward to form a flange (670) in the insulating sealing cover (660), the insulating sealing cover (660) being provided with a spring (680) sleeved on the second conductive column (650) and used for abutting the end of the second conductive column (650) against the conductive ring (610).

5. The centrifuge for sewage treatment according to claim 1, characterized in that: The side wall of the screw conveyor (220) is provided with a conveyor opening (2100), and the inner cavity of the screw conveyor (220) is provided with two water baffles (2110), which are respectively located at the two ends of the conveyor opening (2100). The two water baffles (2110) and the inner cavity of the screw conveyor (220) form a separation cavity (2120). The screw conveyor (220) is provided with a water inlet pipe (2130), one end of which extends into the separation cavity (2120).

6. A centrifuge for sewage treatment according to claim 5, characterised in that: The other end of the water inlet pipe (2130) extends out of the drum (210), and the end of the water inlet pipe (2130) extending out of the drum (210) is provided with a first driving wheel (120). The centrifuge body (100) comprises a water inlet pipe driving motor (130), and the shaft of the water inlet pipe driving motor (130) is provided with a first driving wheel (140). The first driving wheel (120) and the first driving wheel (140) are provided with a first transmission belt (150).

7. A centrifuge for sewage treatment according to claim 5, characterized in that: The end of the water inlet pipe (2130) extending out of the drum (210) is also provided with a rotary joint (2140).

8. A centrifuge for sewage treatment according to claim 1, characterized in that: The end of the drum (210) where the slag discharge port (230) is located extends out of the mounting outer shell (110), and the end of the drum (210) extending out of the mounting outer shell (110) is provided with a second driving wheel (710). The centrifuge body (100) comprises a drum driving motor (720), and the shaft of the drum driving motor (720) is provided with a second driving wheel (730). The second driving wheel (710) and the second driving wheel (730) are provided with a second transmission belt (740).

9. The centrifuge for sewage treatment according to claim 1, characterized in that: The mounting outer shell (110) comprises an upper shell (111) and a lower shell (112), and the upper shell (111) is bolted with the lower shell (112).

10. The centrifuge for sewage treatment according to claim 1, characterized in that: The mounting outer shell (110) is provided with a slag discharge through hole (2150) below the slag discharge port (230), and the mounting outer shell (110) is provided with a water discharge through hole (2160) below the water discharge port (260).

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