Efficient sludge removal equipment for sewage treatment

Abstract

The invention relates to the technical field of sewage treatment, in particular to efficient sludge removal equipment for sewage treatment, which comprises a flow guide assembly, a spiral conveying assembly and a separation assembly, the flow guide assembly is connected with the rotary drum; the spiral conveying assembly comprises a feeding rotary drum and a spiral blade; the feeding rotary drum is arranged in the rotary drum; the spiral blade is connected with the outer layer of the feeding rotary drum; the separation assembly is connected with the feeding rotary drum; according to the present invention, the flow guide plate is adaptively driven to perform expansion movement according to the concentration by different pressures generated by the sewage with different sludge concentrations during centrifugation so as to uniformly distribute the fixed ring layer, and the separation assembly adjusts the sludge discharge amount according to the centrifugal force generated by different concentrations so as to make the centrifuged sewage and sludge perform large-angle rotational flow, such that the sludge discharge amount is adjusted, and the separation efficiency is improved; the separation time and the separation path are prolonged, and the separation effect is enhanced in cooperation with a stepped structure formed by the guide plates; the problem that the separation effect is reduced due to sludge concentration change in sewage is solved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a high-efficiency sludge removal device for sewage treatment. Background Art

[0002] Sludge removal equipment is a device used to remove sludge accumulated in sedimentation tanks, clarification tanks or other solid-liquid separation equipment. Common types of sludge removal equipment include scrapers, sludge suction machines, sludge dischargers and mud-water separation equipment. These devices mainly separate by scraping, suction, centrifugation and filtration, and different methods are usually used for sludge removal according to the processing scale and sludge properties.

[0003] When the amount of sludge is large and needs to be dehydrated efficiently, a filter press is usually used to remove the sludge. During the removal process, the sewage and sludge in the frame are squeezed by a pressing plate, and the mesh plate below the sewage and sludge will discharge the sewage squeezed out during the squeezing process, so that the sludge is filtered out; however, when the pressure is too high during the filtration process, part of the sludge will pass through the mesh plate and be discharged with the sewage due to the pressure, and it will also block the mesh plate. When the pressure is too low, the sewage and sludge will not be effectively separated, and there will be more sewage in the sludge, and the dehydration efficiency is low. The prior art has proposed a good solution to this problem, such as the sludge centrifugal filter press double dehydration method with patent publication number CN104016565B; first, the sludge is preliminarily dehydrated in the first drum by a horizontal screw centrifuge using a centrifugal separation method, and then the preliminarily dehydrated sludge is introduced into the second drum, and the blades of the screw conveyor are transformed into elastic materials. During the separation process of the second drum, high-pressure gas is introduced into the screw conveyor blades, so that the screw conveyor blades filter the sludge while conveying the sludge, and the sludge and sewage are separated.

[0004] Although the existing technology has solved the problem of inadequate separation of sewage and sludge during filter pressing, the following problems still exist: the separation method of traditional sludge centrifugal equipment is to form a solid ring layer after the sludge is thrown out, and the centrifugal force exerted on the water is small, forming a liquid ring layer in the solid ring layer, and the sludge in the solid ring layer is discharged from the sludge centrifugal equipment through a spiral conveying structure, but this separation method cannot adaptively adjust the sludge concentration. Under low-concentration sludge conditions, the free water in the liquid ring layer flows back to flush the solid ring layer under centrifugal force, causing the separated sludge to be re-mixed with the liquid phase, and due to different concentration distributions, the inner wall thickness of the formed solid ring layer will be different, thereby affecting the overall separation. Water efficiency; in high-concentration sludge conditions, on the one hand, the workload of the drum and screw conveyor will increase, resulting in increased energy consumption and a reduced life of the equipment. In addition, the inner wall of the solid ring layer formed at a higher concentration position will be thicker. At this time, the sewage impacting the solid ring layer will cause the sludge and sewage to remix. On the other hand, by injecting high-pressure gas into the elastic spiral blades and then separating the sludge and water through the squeezing between the spiral blades, the spiral blades themselves will be damaged, affecting the separation and discharge of sludge and sewage, resulting in a decrease in separation efficiency. Therefore, when the sludge concentration changes, the separation effect of sludge and sewage will decrease.

[0005] In view of the above situation, in order to overcome the above technical problems, the present invention designs a high-efficiency sludge removal equipment for sewage treatment. Summary of the invention

[0006] The present invention provides a high-efficiency sludge removal device for sewage treatment, which solves the problem of reduced separation effect caused by changes in sludge concentration in sewage. The guide plate is adaptively driven to expand according to the concentration by using the different pressures exerted on the guide plate by sewage with different sludge concentrations during centrifugation. When the sludge concentration is high, the stacking space of the solid ring layer can be changed through the expansion movement of the guide plate, so that the solid ring layer is evenly distributed. The separation component adjusts the sludge discharge according to the centrifugal force generated by different concentrations and makes the sewage and sludge centrifuged swirl at a larger angle, thereby extending the separation time and the separation path. The step structure formed by the guide plate enhances the separation effect, and can also prevent the sewage from scouring the solid ring layer and causing the sludge and sewage to re-mix when the sludge content in the sewage is reduced.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A high-efficiency sludge removal device for sewage treatment, comprising a bracket, a motor and a drum; also comprising a guide assembly, a spiral conveying assembly and a separation assembly; the guide assembly is connected to the drum, and when the sludge concentration increases, the guide assembly expands along the radial direction of the inner wall of the drum to increase the sludge accumulation space, and when the sludge concentration decreases, the guide assembly contracts along the radial direction of the inner wall of the drum to reduce the sludge accumulation space; the spiral conveying assembly comprises a feed drum and spiral blades; the feed drum is arranged in the drum; the spiral blades are connected to the outer layer of the feed drum; the separation assembly is connected to the feed drum, and when the sludge concentration increases, the separation assembly moves along the radial direction of the feed drum away from the axis of the feed drum, and when the sludge concentration decreases, the separation assembly moves along the radial direction of the feed drum towards the axis of the feed drum.

[0009] Preferably, the guide assembly includes a telescopic groove, a guide plate, a guide groove and a centrifugal spring; the telescopic groove circular array is opened on the inner wall of the drum; the guide plate is arranged in the telescopic groove, and a sliding column is arranged on the back of the guide plate; the guide groove is opened in the telescopic groove; the centrifugal spring is connected between the sliding column and the guide groove.

[0010] In the above scheme, since sewage with different sludge concentrations is subjected to different centrifugal forces during rotation, the centrifugal forces acting on the guide plate will also be different. The higher the sludge concentration, the greater the centrifugal force. At this time, the force generated by the sludge on the guide plate will be greater, driving the guide plate to slide centrifugally. At this time, the centrifugal path of the sludge in this area will become longer, thereby extending the separation time and increasing the accumulation space of the solid ring layer, avoiding the situation where the separated sewage at this position cannot flow out smoothly from the other side of the feed drum due to local excessive thickness, and ensuring that when the sludge concentration in the sewage decreases during the subsequent separation process, the guide plate will contract and compress the accumulation space of the solid ring layer, thereby forming a filter press effect.

[0011] Preferably, the inner wall of the guide plate is an arc-shaped structure, and when the pressure applied is less than a limited value, the inner diameter of the circle formed by the inner walls of the multiple guide plates is equal to the diameter of the inner wall of the drum; filling columns are provided on both sides of the telescopic groove, and the filling columns maintain a fit with both sides of the guide plate when the guide plate contracts or expands.

[0012] In the above scheme, the filling column can prevent sludge from entering the back of the guide plate. The sliding movement between the two sides of the guide plate and the filling column is similar to a shoveling movement, which can make the accumulated solid ring layer more easily pushed to the discharge position by the spiral conveying assembly, thereby avoiding blockage caused by accumulation of the solid ring layer.

[0013] Preferably, the inner surface of the guide plate is provided with guide lines; the guide lines are spiral structures, and the rotation direction is the same as that of the spiral blades.

[0014] In the above scheme, the cooperation between the spiral structure of the guide pattern and the spiral conveying assembly enables the sludge adhered to the surface of the guide plate under the action of centrifugal force to be more efficiently discharged from the drum by the spiral conveying assembly.

[0015] Preferably, the guide components are arranged in multiple groups along the axial direction of the drum, and an isolation ring is arranged between every two groups of guide components; the diameter of the isolation ring is equal to the diameter of the inner wall of the drum.

[0016] In the above scheme, since the sludge in the sewage is centrifuged out of the feed drum along the feed direction, the sludge content in the sewage is gradually decreasing along the feed direction. At this time, the guide plate will form a stepped groove shape with a gradually decreasing flow area along the feed direction, thereby gradually reducing the sludge accumulation space, and the two rigid structures of the outer side of the feed drum and the guide plate are used to squeeze the sludge to achieve a filter press effect, thereby efficiently separating the sewage and the sludge; and since the guide plate expands under the centrifugal force, the inner diameter formed at the guide plate position is larger than the diameter at the isolation ring position, which can help increase the discharge speed of the solid ring layer, and when it reaches the next guide component position, since the flow area here is smaller than the flow area at the previous guide component and smaller than the flow area at the isolation ring position, it can balance the pressure and flow rate to avoid turbulence, thereby preventing the solid ring layer from being unstable and causing the sludge and sewage to mix again.

[0017] Preferably, the separation assembly includes a separation port, a centrifugal sealing plate and a separation spring; the separation port is opened on the feed drum, and separation chutes are opened on both sides of the separation port; the centrifugal sealing plate is slidably installed in the centrifugal sealing plate; the separation spring is connected between the centrifugal sealing plate and the separation chute.

[0018] In the above scheme, the sewage entering the feed drum will cause the sludge to be thrown out from the separation port under the action of the centrifugal force of the rotation of the feed drum. The sewage enters the feed drum from the feed direction to the discharge direction. Since the sludge is centrifuged out of the feed drum along the feed to discharge direction, the concentration of sludge in the sewage will gradually decrease, resulting in an uneven distribution of the solid ring layer formed by the sludge in the separation drum. Here, the displacement of the separation port is adaptively controlled under centrifugal force to ensure that the sludge is separated according to the concentration at different positions, so that the solid ring layer formed by the separated sludge is more uniform, thereby reducing the impact of concentration changes.

[0019] Preferably, the feed drum comprises a cylindrical section and a conical section; a plurality of separation ports are provided along the middle position of the cylindrical section toward the conical section.

[0020] In the above scheme, the sludge separation efficiency can be improved by using multiple separation ports, and because the separation port starts from the middle position of the cylindrical section, the sewage will not start to separate until it reaches the middle position of the cylindrical section. On the one hand, there will be no sludge separation in the half section of the cylindrical section close to the feed side, which can reduce the sludge content in the sewage after it is separated, thereby ensuring the sludge removal effect.

[0021] Preferably, the inner surface of the centrifugal sealing plate is provided with a guiding arc surface; the distance between the guiding arc surface and the outer wall of the feed drum gradually increases in the clockwise direction.

[0022] In the above scheme, when sewage and sludge flow out from the separation port, they will undergo cyclonic centrifugation at a larger angle under the restriction of the guiding arc surface of the centrifugal sealing plate, rather than moving directly to the inner wall of the drum in the radial direction, thereby increasing the centrifugal path and extending the centrifugal time, so that the separation effect of sewage and sludge is better, and it can ensure that under low concentration conditions, the cyclonic angle of the liquid ring layer after flowing out of the separation port is larger, avoiding direct radial impact on the solid ring layer and causing the sludge in the solid ring layer to be dispersed again; and it is beneficial for the centrifugal forces on the multiple guide plates to be almost the same during the expansion movement, thereby ensuring that the shape formed by the inner walls of the multiple guide plates remains a circular structure, avoiding stress concentration and extending the life of the equipment.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. Compared with the existing sludge centrifugal separation equipment, the present invention utilizes the different centrifugal forces generated by different sludge contents in sewage to achieve the effect of adaptively driving the expansion movement of the guide plate according to the change of sludge concentration, and changes the sludge accumulation space of the solid ring layer through the expansion movement of the guide plate, so as to ensure that the inner layer of the formed solid ring layer is evenly distributed, thereby avoiding the sewage at the junction of the liquid ring layer and the solid ring layer from impacting the solid ring layer under the action of centrifugal force, causing the sludge and sewage to be re-mixed, so that the separation effect of sludge and sewage is significantly improved, and through the expansion and contraction movement of the guide plate and the guide pattern on its inner surface, it can cooperate with the spiral conveying component to increase the discharge speed of the sludge, avoid sludge accumulation and blockage, and prevent the sludge and sewage from being re-mixed.

[0025] 2. The present invention arranges a plurality of guide components in the axial direction of the drum, and since the separation port on the feed drum is arranged along the axial direction, the concentration of the sludge will gradually decrease along the feed direction, and a stepped groove shape with a gradually decreasing flow area will be formed in the axial direction of the drum, thereby gradually reducing the accumulation space of the sludge, and utilizing the two rigid structures of the outer side of the feed drum and the guide plate to squeeze the sludge to achieve a filter press effect, thereby efficiently separating sewage and sludge without causing damage to the life of the equipment.

[0026] 3. The present invention sets a separation component and changes the discharge volume of the separation port according to the change of sludge concentration. As the concentration decreases, the discharge volume of the separation port will decrease, thereby ensuring that under low-concentration conditions, sewage with less sludge content can be prevented from impacting the formed sludge solid ring layer under the action of centrifugal force, resulting in re-mixing of sludge and sewage. The guiding arc surface on the inner surface of the centrifugal sealing plate can make the sewage and sludge swirl at a larger angle when they are centrifuged out to feed the rotating drum, thereby extending the separation time and separation path, enhancing the separation effect, and avoiding direct radial outflow to impact the solid ring layer, thereby preventing the sludge from returning to the sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is the overall structure diagram of the present invention;

[0029] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0030] Figure 3 is an axial cross-sectional view of the present invention;

[0031] Figure 4 is a radial cross-sectional view of the flow guide assembly of the present invention;

[0032] Figure 5 for Figure 3 A magnified view of the structure at center;

[0033] Figure 6 A radial cross-sectional view of a separation assembly of the present invention;

[0034] Figure 7 for Figure 6 A magnified view of the structure at B in the middle;

[0035] Figure 8 A schematic diagram of the expansion movement direction of the guide plate of the present invention;

[0036] Fig. 9 This is a schematic diagram of the guide plate of the present invention being stepped in axial direction;

[0037] In the figure: 1. bracket; 2. motor; 3. drum; 4. guide assembly; 41. telescopic slot; 411. filling column; 42. guide plate; 421. sliding column; 422. guide pattern; 43. guide groove; 44. centrifugal spring; 45. isolation ring; 5. spiral conveying assembly; 51. feed drum; 511. cylindrical section; 512. conical section; 52. spiral blade; 6. separation assembly; 61. separation port; 611. separation chute; 62. centrifugal sealing plate; 621. guide arc surface; 63. separation spring. DETAILED DESCRIPTION

[0038] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0039] See also Figures 1 to 9 The present invention provides a high-efficiency sludge removal device for sewage treatment, and the technical solution is as follows:

[0040] As a specific embodiment of the present invention, refer to Figure 1 , Figure 2 and Figure 3 , a high-efficiency sludge removal device for sewage treatment, comprising a bracket 1, a motor 2 and a drum 3; further comprising a flow guide component 4, a spiral conveying component 5 and a separation component 6; the flow guide component 4 is connected to the drum 3, when the sludge concentration increases, the flow guide component 4 expands along the radial direction of the inner wall of the drum 3 to increase the sludge accumulation space, and when the sludge concentration decreases, the flow guide component 4 contracts along the radial direction of the inner wall of the drum 3 to reduce the sludge accumulation space; the spiral conveying component 5 comprises a feeding drum 51 and a spiral blade 52; the feeding drum 51 It is arranged in the drum 3; the spiral blades 52 are connected to the outer layer of the feed drum 51; the separation component 6 is connected to the feed drum 51, and when the sludge concentration increases, the separation component 6 moves along the radial direction of the feed drum 51 away from the axis of the feed drum 51, so that the amount of sludge and sewage discharged from the feed drum 51 per unit time increases; when the sludge concentration decreases, the separation component 6 moves along the radial direction of the feed drum 51 close to the axis of the feed drum 51, so that the amount of sludge and sewage discharged from the feed drum 51 per unit time decreases.

[0041] As a specific embodiment of the present invention, refer to Figure 3 , Figure 4 and Figure 8The guide assembly 4 includes a telescopic slot 41, a guide plate 42, a guide slot 43 and a centrifugal spring 44; the telescopic slot 41 is arranged in a circumferential array on the inner wall of the drum 3; the guide plate 42 is arranged in the telescopic slot 41, and a sliding column 421 is arranged on the back of the guide plate 42; the guide slot 43 is arranged in the telescopic slot 41; the centrifugal spring 44 is connected between the sliding column 421 and the guide slot 43. Since sewage with different sludge concentrations is subjected to different centrifugal forces during rotation, the centrifugal forces acting on the guide plate 42 will also be different. When the sludge concentration is higher, the centrifugal force is greater. At this time, the force generated by the sludge on the guide plate 42 will be greater, driving the guide plate 42 to slide centrifugally. At this time, the centrifugal path of the sludge in this area will become longer, thereby extending the separation time and increasing the accumulation space of the solid ring layer, preventing the separated sewage at this position from being unable to flow out smoothly from the other side of the feed drum 51 due to local excessive thickness, and ensuring that when the sludge concentration in the sewage decreases during the subsequent separation process, the guide plate 42 will contract and compress the accumulation space of the solid ring layer, thereby forming a filter press effect.

[0042] As a specific embodiment of the present invention, refer to Figure 3 and Figure 4 The inner wall of the guide plate 42 is an arc-shaped structure, and when the pressure is less than the limit value, the inner diameter of the circle formed by the inner walls of the multiple guide plates 42 is equal to the diameter of the inner wall of the drum 3 (here it can be set that the centrifugal force cannot press the guide plate 42 when separating sewage with a sludge content of less than 50%. Taking into account the different separated sludges, its density can be calculated according to actual sampling. After calculating the approximate range of the density of sewage with a sludge content of 50%, the pressure on the guide plate 42 can be calculated according to the value. The pressure at this time is the limit value. In addition, the limit value is also equal to the force that can cause the centrifugal spring 44 selected here to deform). Filling columns 411 are provided on both sides of the telescopic groove 41. When the guide plate 42 contracts or expands, the filling columns 411 and the two sides of the guide plate 42 remain in contact with each other. The filling column 411 can prevent the sludge from entering the back of the guide plate 42. The sliding motion between the two sides of the guide plate 42 and the filling column 411 is similar to a shoveling motion, which can make the accumulated solid ring layer more easily pushed to the discharge position by the spiral conveying component 5, thereby avoiding the accumulation of the solid ring layer and causing blockage. The inner surface of the guide plate 42 is provided with a guide pattern 422; the guide pattern 422 is a spiral structure, and the rotation direction is the same as that of the spiral blade 52. Through the cooperation of the spiral structure of the guide pattern 422 and the spiral conveying component 5, the sludge attached to the surface of the guide plate 42 under the action of centrifugal force can be more efficiently discharged from the drum 3 by the spiral conveying component 5, thereby ensuring that the sludge will not be re-mixed with the sewage due to staying in the drum 3 for too long.

[0043] As a specific embodiment of the present invention, refer to Figure 3 and Fig. 9 The guide components 4 are arranged in multiple groups along the axial direction of the drum 3, and an isolation ring 45 is arranged between every two groups of guide components 4; the diameter of the isolation ring 45 is equal to the diameter of the inner wall of the drum 3. Since the sludge in the sewage is gradually centrifuged out of the feed drum 51 along the feed direction, the sludge content in the sewage is gradually reduced along the feed direction. At this time, the guide plate 42 will form a stepped groove shape with a gradually decreasing flow area along the feed direction, thereby gradually reducing the sludge accumulation space. The feed drum 51 and the guide plate 42 are both made of stainless steel. The two rigid structures of the outer side of the feed drum 51 and the guide plate 42 are used to squeeze the sludge to achieve a filter press effect, thereby efficiently separating the sewage and the sludge; and since the guide plate 42 expands under the centrifugal force, the inner diameter formed at the position of the guide plate 42 is larger than the diameter at the position of the isolation ring 45, which can help increase the discharge speed of the solid ring layer. When it reaches the position of the next guide component 4, since the flow area is smaller than the flow area at the previous guide component 4 and smaller than the flow area at the isolation ring 45, it can balance the pressure and flow rate to avoid turbulence, thereby avoiding the instability of the solid ring layer and the re-mixing of sludge and sewage. The feed drum 51 includes a cylindrical section 511 and a conical section 512; a plurality of separation openings 61 are provided along the middle of the cylindrical section 511 toward the conical section 512. The plurality of separation openings 61 can increase the sludge separation efficiency, and since the separation openings 61 start from the middle of the cylindrical section 511, the sewage will not start to separate until it reaches the middle of the cylindrical section 511. On the one hand, there will be no sludge separation in the half section of the cylindrical section 511 close to the feed side, which can reduce the sludge content in the separated sewage and ensure the sludge removal effect.

[0044] As a specific embodiment of the present invention, refer to Figure 5 and Figure 6The separation assembly 6 includes a separation port 61, a centrifugal sealing plate 62 and a separation spring 63; the separation port 61 is provided on the feed drum 51, and separation chutes 611 are provided on both sides of the separation port 61; the centrifugal sealing plate 62 is slidably installed in the centrifugal sealing plate 62; the separation spring 63 is connected between the centrifugal sealing plate 62 and the separation chute 611. The sewage entering the feed drum 51 will cause the sludge to be thrown out from the separation port 61 under the action of the centrifugal force of the rotation of the feed drum 51. The sewage enters the feed drum 51 from the feed direction to the discharge direction. Since the sludge is centrifuged out of the feed drum 51 along the feed to discharge direction, the concentration of the sludge in the sewage will gradually decrease, resulting in an uneven distribution of the solid ring layer formed by the sludge in the separation drum 3. Here, the displacement of the separation port 61 is adaptively controlled under centrifugal force, so that the sludge can be separated according to the concentration at different positions. When the sludge concentration is higher, the discharge volume will be larger, thereby ensuring that a concentration difference is formed in the axial direction. At this time, the multiple groups of guide components 4 in the axial direction will be more likely to form a stepped structure, thereby ensuring that the sludge can be subjected to the filter pressing effect to improve the separation effect, and since the solid ring layer formed at the high concentration position will be sent to the discharge direction by the spiral blades 52, the solid ring layer formed by the sludge at the low concentration position will not be too thin, thereby ensuring that the solid ring layer is more uniform, and can prevent low-concentration sewage from being discharged to the solid ring layer position in large quantities, ensuring that the solid ring layer will not be damaged.

[0045] As a specific embodiment of the present invention, refer to Figure 6 and Figure 7 , the inner surface of the centrifugal sealing plate 62 is provided with a guide arc surface 621; the distance between the guide arc surface 621 and the outer wall of the feed drum 51 gradually increases in the clockwise direction. When the sewage and sludge flow out of the separation port 61, they will undergo a larger angle of swirl centrifugation under the restriction of the guide arc surface 621 of the centrifugal sealing plate 62, rather than directly moving to the inner wall of the drum 3 in the radial direction, thereby increasing the centrifugal path and extending the centrifugal time, so that the separation effect of sewage and sludge is better, and it can ensure that under low concentration conditions, the swirl angle of the liquid ring layer after flowing out of the separation port 61 is larger, avoiding direct radial impact on the solid ring layer and causing the sludge in the solid ring layer to be dispersed again; and it is beneficial for the centrifugal force of the multiple guide plates 42 to be almost the same during the expansion movement, thereby ensuring that the shape formed by the inner walls of the multiple guide plates 42 remains a circular structure, avoiding stress concentration and extending the life of the equipment.

[0046] Working process: sewage containing sludge is introduced into the feed drum 51, and the motor 2 is started to drive the feed drum 51 to rotate. Under the centrifugal force generated by the rotation, the centrifugal force exerted on the sludge with a larger mass is greater than the centrifugal force exerted on the sewage. At this time, the sludge will be thrown onto the inner wall of the guide plate 42. When the sludge concentration changes, the pressure exerted on the guide plate 42 by the centrifugal force exerted on the sludge also changes accordingly, causing the guide plate 42 to expand and change the sludge accumulation space. At this time, the inner wall of the solid ring layer formed by the sludge will be more uniform, preventing the sludge and sewage from re-mixing; at the same time, the pressure exerted by the sludge on the centrifugal sealing plate 62 will also change, so that the centrifugal sealing plate 62 can adjust the displacement of the feed drum 51, help the guide plate 42 to form a stepped guide channel in the axial direction, and filter the sludge; and the guide arc surface 621 on the inner side of the centrifugal sealing plate 62 will drive the sludge to swirl at a larger angle, extend the separation path and separation time of the sludge, improve the separation effect, and reduce the impact of sewage on the solid ring layer formed by the sludge.

[0047] Specifically, the sewage containing sludge is introduced into the feed drum 51, and the motor 2 is started to drive the feed drum 51 to rotate. Under the centrifugal force generated by the rotation, the centrifugal force exerted on the sludge with a larger mass is greater than the centrifugal force exerted on the sewage. At this time, the sludge will be thrown onto the inner wall of the guide plate 42 to form a solid ring layer, while the sewage subjected to a smaller centrifugal force will form a liquid ring layer in the inner circle. In order to avoid the uneven inner wall of the solid ring layer, which leads to uneven force at the junction of the liquid ring layer and the solid ring layer and the re-mixing of sludge and sewage, the guide plate 42 performs adaptive expansion movement according to different sludge concentrations. The greater the centrifugal force, the greater the pressure on the guide plate 42 and the centrifugal sealing plate 62. Along the feeding direction, the sludge is thrown out of the feeding drum 51 under the action of the centrifugal force, so the sludge concentration will gradually decrease along the feeding direction. At this time, the openings of the multiple centrifugal sealing plates 62 along the feeding direction will also gradually decrease. At this time, along the feeding direction, the multiple guide plates 42 will form a stepped inner wall in the axial direction, so that the sludge accumulation space at the position with greater concentration is larger, thereby helping to make the inner wall of the solid ring layer more uniform, preventing the sludge and sewage from being re-mixed due to uneven force at the junction of the liquid ring layer and the solid ring layer. Moreover, under the stepped structure, the sludge accumulation space is gradually reduced, and the sludge at the high concentration position will be sent to the low concentration position under the conveying action of the spiral blade 52, so that the sludge is subjected to the filter pressing effect, further improving the separation effect, and the solid ring layer formed by the sludge at the low concentration position will not be too thin under the conveying action of the spiral blade 52, thereby ensuring that the solid ring layer is more uniform; since the sludge content in the sewage gradually decreases along the feeding direction (which is also the discharge direction of the sludge), the opening degree of the centrifugal port 61 will also gradually decrease, thereby reducing the impact of the sewage with low sludge content on the solid ring layer to be discharged. Impact, thereby improving the separation effect of sludge and sewage; in order to further improve the separation effect of sludge and sewage and reduce the impact of sewage on the inner wall of the solid ring layer that has been formed, the guide arc surface 621 on the inner side of the centrifugal sealing plate 62 will drive the sludge to swirl at a larger angle, thereby extending the separation path and separation time of the sludge, and achieving the purpose of improving the separation effect. In addition, due to the larger swirl angle, the impact of sewage on the solid ring layer will be reduced. At the same time, since the swirl of sewage is larger than the direct radial impact, the swirl force it generates will have a protective effect on the inner wall of the solid ring layer, making the inner wall of the solid ring layer more stable.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected, and the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A high-efficiency sludge removal device for sewage treatment, comprising a support (1), a motor (2) and a drum (3); characterized in that: The utility model also comprises a flow guide component (4), a spiral conveying component (5) and a separation component (6); the flow guide component (4) is connected to the rotary drum (3); when the sludge concentration increases, the flow guide component (4) performs an expansion movement along the radial direction of the inner wall of the rotary drum (3) to increase the sludge accumulation space; when the sludge concentration decreases, the flow guide component (4) performs a contraction movement along the radial direction of the inner wall of the rotary drum (3) to reduce the sludge accumulation space; the spiral conveying component (5) comprises a feed rotary drum (51) and spiral blades (52); the feed rotary drum (51) is arranged in the rotary drum (3); the spiral blades (52) are connected to the outer layer of the feed rotary drum (51); the separation component (6) is connected to the feed rotary drum (51); when the sludge concentration increases, the separation component (6) moves along the radial direction of the feed rotary drum (51) away from the axis of the feed rotary drum (51); when the sludge concentration decreases, the separation component (6) moves along the radial direction of the feed rotary drum (51) towards the axis of the feed rotary drum (51).

2. The high-efficiency sludge removal equipment for sewage treatment according to claim 1 is characterized in that: The guide assembly (4) comprises a telescopic groove (41), a guide plate (42), a guide groove (43) and a centrifugal spring (44); the telescopic grooves (41) are arranged in a circumferential array on the inner wall of the drum (3); the guide plate (42) is arranged in the telescopic groove (41), and a sliding column (421) is arranged on the back of the guide plate (42); the guide groove (43) is arranged in the telescopic groove (41); and the centrifugal spring (44) is connected between the sliding column (421) and the guide groove (43).

3. The high-efficiency sludge removal equipment for sewage treatment according to claim 2, characterized in that: The inner wall of the guide plate (42) is an arc-shaped structure, and when the pressure applied is less than a limited value, the inner diameter of the circle formed by the inner walls of the plurality of guide plates (42) is equal to the diameter of the inner wall of the drum (3); filling columns (411) are arranged on both sides of the telescopic groove (41), and when the guide plate (42) performs a contraction or expansion movement, the filling columns (411) and both sides of the guide plate (42) maintain a fitted state.

4. The high-efficiency sludge removal equipment for sewage treatment according to claim 3 is characterized in that: The inner surface of the guide plate (42) is provided with a guide pattern (422); the guide pattern (422) is a spiral structure, and the direction of rotation is the same as that of the spiral blade (52).

5. The high-efficiency sludge removal equipment for sewage treatment according to claim 2, characterized in that: The flow guide components (4) are arranged in multiple groups along the axial direction of the drum (3), and an isolation ring (45) is arranged between every two groups of flow guide components (4); the diameter of the isolation ring (45) is equal to the diameter of the inner wall of the drum (3).

6. The high-efficiency sludge removal equipment for sewage treatment according to claim 5, characterized in that: The separation assembly (6) comprises a separation port (61), a centrifugal sealing plate (62) and a separation spring (63); the separation port (61) is provided on the feed drum (51), and separation chutes (611) are provided on both sides of the separation port (61); the centrifugal sealing plate (62) is slidably installed in the centrifugal sealing plate (62); and the separation spring (63) is connected between the centrifugal sealing plate (62) and the separation chute (611).

7. The high-efficiency sludge removal equipment for sewage treatment according to claim 6, characterized in that: The feed drum (51) comprises a cylindrical section (511) and a conical section (512); a plurality of separation ports (61) are provided along the middle of the cylindrical section (511) towards the conical section (512).

8. The high-efficiency sludge removal equipment for sewage treatment according to claim 7, characterized in that: The inner surface of the centrifugal sealing plate (62) is provided with a guide arc surface (621); the distance between the guide arc surface (621) and the outer wall of the feed drum (51) gradually increases in the opposite direction of the rotation of the feed drum (51).

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