Sludge thickening and dewatering device

Abstract

The invention discloses a sludge concentration and dehydration device which comprises a mixer, an inlet of the mixer is connected with a sewage inlet pipe, a liquid outlet of the mixer is communicated with an inlet of a stirring box through a pipeline, an outlet of the stirring box is communicated with a concentration box through a liquid outlet pipe, a concentration mechanism is arranged in the concentration box, and a concentration box discharge port is formed in the side wall of the concentration box. A material guide cover is arranged on the side face of the concentration box, a discharging port of the material guide cover is communicated with the dehydration box, and a pressing plate is arranged on the upper portion of a sludge outlet in the dehydration box. According to the sludge dewatering device, sewage and medicines are primarily flocculated through the mixer, then a mixed solution is guided into the stirring box for secondary flocculation, so that the flocculation effect of sludge is enhanced, dewatering is facilitated, then the sludge passes through the concentration mechanism, the concentrated sludge enters the dewatering box, the low-concentration sludge is concentrated, the solid content of the sludge is increased, and the sludge dewatering effect is improved. The water content of the sludge is reduced again through the dewatering box, and the device is suitable for dewatering the high-flow low-concentration sludge.

Description

Technical Field

[0001] The invention relates to the technical field of sludge concentration and dehydration equipment, in particular to a sludge concentration and dehydration device. Background Art

[0002] Currently, the types of dewatering machines include centrifugal sludge dewatering machine, belt sludge dewatering machine, screw stacking sludge dewatering machine, etc. The centrifugal dewatering machine relies on the motor to drive the drum to rotate at high speed to form centrifugal force for solid-liquid separation, which has high energy consumption, high purchase and maintenance costs, high noise, and complex operation; the belt dewatering machine relies on the filter belt to squeeze to form solid-liquid separation. During operation, high-pressure cleaning water is required to continuously rinse the filter cloth, resulting in a waste of water resources, and the splashing of cleaning water affects the on-site environment, resulting in a poor working environment; the stacked screw sludge dewatering machine is composed of unequally spaced spirals, filter discs, and support discs. During operation, the spiral shaft rotates to drive the filter discs to form a variable gap, and the water is discharged from the gap. The sludge is compressed and discharged by the unequally spaced spirals. The disadvantage of this structure is that it cannot adapt to some highly abrasive sludge such as the sand in tap water. Abrasion will cause the spiral to become thinner and smaller, the filter body gap to become larger, and maintenance is frequent, which in turn affects the sludge dewatering effect. For some viscous sludge, it is easy to fill and block the spiral and the gap, resulting in shutdown accidents such as shaft sticking. In addition, this type of equipment also requires a large amount of water for continuous cleaning, causing secondary pollution and increasing energy consumption.

[0003] At the same time, the existing sludge dewatering machines have high requirements for the solid content of sludge, generally around 1%-3%. When the solid content of sewage entering the sludge dewatering machine is lower than 1%, it is necessary to add a sludge thickening tank in front of the equipment, which not only increases the floor space of the equipment, but also increases energy consumption. However, the current sludge dewatering machines have relatively low processing efficiency due to the lack of efficient thickening mechanisms, and the sludge water content is relatively high, resulting in poor dehydration effect, and cannot adapt to the dehydration of large-flow, low-concentration sludge. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a sludge thickening and dehydration device.

[0005] The objective of the present invention is achieved through the following technical scheme: a sludge thickening and dehydration device, comprising a mixer, a stirring box, a thickening box and a dehydration box, the inlet of the mixer is connected to a sewage inlet pipe, the liquid outlet of the mixer is connected to the inlet of the stirring box through a pipeline, the outlet of the stirring box is connected to the thickening box through a liquid outlet pipe, a thickening mechanism is arranged in the thickening box, a liquid collecting plate is arranged below the thickening mechanism, a conduit is arranged at the liquid outlet of the liquid collecting plate, the conduit is connected to an external filtrate outlet, a thickening box discharge port is arranged on the side wall of the thickening box, a material guide cover is arranged on the side of the thickening box, and the discharge end of the thickening box discharge port is located in the material guide cover, the discharge port of the material guide cover is connected to the dehydration box, a pressure plate is arranged on the upper part of the mud discharge port on the dehydration box, and the mixer, the stirring box, the thickening box and the dehydration box are all electrically connected to the control box.

[0006] Preferably, the mixer includes a shell and a pipeline mixing box, a bearing is provided on the shell, a stirring shaft is provided in the shell, and the bearings are installed at both ends of the stirring shaft, a partition, an impeller a and an impeller b are installed on the stirring shaft, and the impeller a and the impeller b are respectively located on both sides of the partition, the water outlet of the sewage inlet pipe is connected with the chamber where the impeller a is located, a regulating valve is provided on the sewage inlet pipe, a drug inlet pipe and a conduit b are provided on the chamber where the impeller b is located, the other end of the conduit b is connected with the pipeline mixing box, and a water inlet pipe is provided on the outside of the shell, and the two ends of the water inlet pipe are respectively connected with the chamber where the impeller a is located and the chamber where the impeller b is located.

[0007] Preferably, the pipeline mixing box is provided with chamber C, chamber B and chamber A from the inside to the outside, chamber B is provided with a swirl inlet a, chamber C is provided with a swirl inlet b, the upper end of chamber C is provided with a pressure release valve, the lower end of chamber C is provided with a liquid outlet, and the liquid outlet is provided with a regulating valve b.

[0008] Preferably, a stirring motor is arranged above the stirring box, the power output end of the stirring motor is connected to the stirring rod, the stirring rod is located in the stirring box, an overflow plate is arranged in the stirring box, an observation window and an odor collection pipe a are arranged on the upper part of the stirring box, and a liquid level meter is arranged in the stirring box.

[0009] Preferably, the concentrating mechanism includes a filter body, which is mounted on a rotating shaft, and a driven gear is provided at the end of the rotating shaft, the driven gear is located outside the concentrating tank, a reduction motor is installed on the surface of the concentrating tank, the power output end of the reduction motor is connected to the driving gear, and the driving gear and the driven gear are connected by a chain, a liquid level meter b is provided in the concentrating tank, and an odor collection pipe b is provided on the concentrating tank.

[0010] Preferably, the filter body is distributed in a concave arc shape.

[0011] Preferably, an upper filter body and a lower filter body are provided in the dewatering box, and the upper filter body and the lower filter body are correspondingly installed on a rotating shaft, and the end of the rotating shaft is connected to the power output end of the reduction motor b, and the reduction motor b is installed on the protective cover outside the dewatering box. The upper filter body rotates clockwise, and the lower filter body rotates counterclockwise, and the number of the lower filter bodies is more than the number of the upper filter bodies. The discharge port of the material guide cover is located above the feed port of the lower filter body, and the mud discharge port is located at the discharge port of the lower filter body. A liquid level meter c is provided in the dewatering box.

[0012] Preferably, the upper filter bodies are distributed in an upward convex arc shape, and the lower filter bodies are distributed in a downward convex arc shape.

[0013] Preferably, the pressure plate includes an outer shell and an adjusting rod, a spring is arranged in the outer shell, the lower end of the spring is connected to the pressure rod, a bearing bracket is arranged at the lower end of the pressure rod, a bearing b is installed on the bearing bracket, the bearing b is pressed on the mud outlet, a threaded section is opened on the upper part of the outer shell, a threaded section b corresponding to the threaded section is opened on the side wall of the adjusting rod, and the end of the adjusting rod is installed on the upper end of the spring.

[0014] The present invention has the following advantages: the present invention performs primary flocculation on sewage and medicines through a mixer, and then introduces the mixed liquid into a stirring tank for secondary flocculation, thereby enhancing the flocculation effect of the sludge, thereby facilitating dehydration, and then the sludge passes through a concentrating mechanism, wherein part of the clean water flows out from a liquid collecting plate below the concentrating mechanism, and the concentrated sludge enters a dehydration tank, thereby concentrating the low-concentration sludge, increasing the solid content of the sludge, and increasing the processing capacity of the dehydration tank, and the dehydration tank reduces the water content of the sludge again, and the lumpy sludge is finally discharged from the mud outlet, and the device is suitable for dehydrating large-flow low-concentration sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the sludge concentration and dehydration device;

[0016] Figure 2 This is a schematic diagram of the structure on the back of the sludge thickening and dehydration device;

[0017] Figure 3 is a schematic diagram of the structure of the mixer;

[0018] Figure 4 It is a structural schematic diagram of the corresponding flow directions of sludge and water in the thickening tank and dewatering tank;

[0019] Figure 5 It is a structural schematic diagram of the pressing plate;

[0020] In the figure, 1-sewage inlet pipe, 2-drug inlet pipe, 3-mixing box, 4-mixing motor, 6-liquid outlet pipe, 7-concentration box, 8-filter body, 9-liquid level gauge b, 10-odor collection pipe b, 11-concentration box discharge port, 12-material guide cover, 13-liquid collecting plate, 14-dehydration box, 15-lower filter body, 16-liquid level gauge c, 17-pressing plate, 18-mud outlet, 19-reduction motor, 20-chain, 21-reduction motor b, 22-shield, 23-upper filter body, 24-filtrate outlet, 25-control box, 2 6-mixer, 102-regulating valve, 103-housing, 104-bearing, 105-water inlet pipe, 106-impeller b, 107-impeller a, 108-agitation shaft, 109-partition, 110-duct b, 111-pressure release valve, 112-liquid outlet, 113-regulating valve b, 114-swirl inlet b, 115-swirl inlet a, 116-regulating rod, 117-threaded section, 118-housing, 119-spring, 120-pressure rod, 121-bearing bracket, 122-bearing b. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In this embodiment, if Figure 1As shown, a sludge thickening and dehydration device includes a mixer 26, a stirring tank 3, a thickening tank 7 and a dehydration tank 14, the inlet of the mixer 26 is connected to the sewage inlet pipe 1, the liquid outlet 112 of the mixer 26 is communicated with the inlet of the stirring tank 3 through a pipeline, the outlet of the stirring tank 3 is communicated with the thickening tank 7 through the liquid outlet pipe 6, a thickening mechanism is arranged in the thickening tank 7, a liquid collecting plate 13 is arranged below the thickening mechanism, a conduit is arranged at the liquid outlet of the liquid collecting plate 13, and the conduit is communicated with the external filtrate outlet 24, a thickening tank discharge port 11 is arranged on the side wall of the thickening tank 7, a material guide cover 12 is arranged on the side of the thickening tank 7, and the discharge end of the thickening tank discharge port 11 is located in the material guide cover 12, the discharge port of the material guide cover 12 is communicated with the dehydration tank 14, and a pressing plate 17 is arranged on the upper part of the mud discharge port 18 on the dehydration tank 14, and the mixer 26, the stirring tank 3, the thickening tank 7 and the dehydration tank 14 are all electrically connected to the control box 25. The sewage and the medicine are initially flocculated by the mixer 26, and the mixed liquid is then introduced into the stirring tank 3 for secondary flocculation, thereby enhancing the flocculation effect of the sludge, thereby facilitating dehydration. The sludge then passes through the concentration mechanism, and part of the clean water flows out from the liquid collecting plate 13 below the concentration mechanism. The concentrated sludge enters the dehydration tank 14, thereby concentrating the low-concentration sludge, increasing the solid content of the sludge, and increasing the processing capacity of the dehydration tank 14. The dehydration tank 14 reduces the water content of the sludge again, and the lumpy sludge is finally discharged from the mud outlet 18. The device is suitable for dehydrating large-flow, low-concentration sludge. In this embodiment, the start and stop of the corresponding valves and drive motors involved in the mixer 26, the stirring tank 3, the concentration tank 7 and the dehydration tank 14 are all controlled by the control box 25.

[0028] Further, such as Figure 3As shown, the mixer 26 includes a shell 103 and a pipeline mixing box, a bearing 104 is provided on the shell 103, a stirring shaft 108 is provided in the shell 103, and the bearing 104 is installed at both ends of the stirring shaft 108, a partition 109, an impeller a107 and an impeller b106 are installed on the stirring shaft 108, and the impeller a107 and the impeller b106 are respectively located on both sides of the partition 109, the water outlet of the sewage inlet pipe 1 is connected with the chamber where the impeller a107 is located, a regulating valve 102 is provided on the sewage inlet pipe 1, a drug inlet pipe 2 and a conduit b110 are provided on the chamber where the impeller b106 is located, and the other end of the conduit b110 is connected to the pipeline mixing box, and a water inlet pipe 105 is provided on the outside of the shell 103, and the two ends of the water inlet pipe 105 are respectively connected with the chamber where the impeller a107 is located and the chamber where the impeller b106 is located. Furthermore, the pipeline mixing box is provided with C chamber, B chamber and A chamber from the inside to the outside, the B chamber is provided with a swirl inlet a115, the C chamber is provided with a swirl inlet b114, the upper end of the C chamber is provided with a pressure release valve 111, the lower end of the C chamber is provided with a liquid outlet 112, and the liquid outlet 112 is provided with a regulating valve b113. Specifically, the sewage to be flocculated enters the chamber where the impeller a107 is located from the sewage inlet pipe 1, and the impeller a107 drives the stirring shaft 108 to rotate under the driving force of the water, thereby driving the impeller b106 to rotate, and the sewage in the chamber where the impeller a107 is located enters the chamber where the impeller b106 is located through the water inlet pipe 105, that is, the stirring chamber, and at the same time, the reagent enters the stirring chamber through the reagent inlet pipe 2, contacts and stirs the sewage, and the sewage that is initially mixed and begins to flocculate enters the pipeline mixing box through the guide tube b110, and the sewage and the reagent quickly swirl and fill in the A chamber, and then passes through the swirl. The flow inlet a115 enters the B chamber at a tangential position, the sewage and the agent swirl rapidly in the B chamber and fill it, and then enter the C chamber at a tangential position through the swirl inlet b114, the sewage and the agent continue to swirl along the pipe wall in the C chamber until the C chamber is filled and then enters the mixing box 3 from the liquid outlet 112, wherein a pressure release valve 111 is provided at the upper end of the C chamber, which serves to provide pressure protection for the equipment and pipelines, and a regulating valve 102 is provided on the sewage inlet pipe 1, and the regulating valve 102 serves to adjust the water inlet pressure, thereby adjusting the rotation speed of the impeller a107.

[0029] In this embodiment, a stirring motor 4 is arranged above the stirring box 3, and the power output end of the stirring motor 4 is connected to the stirring rod, and the stirring rod is located in the stirring box 3. An overflow plate is arranged in the stirring box 3, and an observation window and an odor collection pipe a are arranged on the upper part of the stirring box 3. A liquid level meter is arranged in the stirring box 3. Specifically, when the mixed liquid enters the stirring box 3, the stirring motor 4 drives the stirring rod to rotate at a low speed, so that the contact between the sewage and the agent is more complete, and the sewage is flocculated at a low speed, which will not destroy the molecular chain of the polymer agent, increase the flocculation effect, that is, increase the formation speed of flocs in the sewage, which is conducive to the subsequent sludge concentration; the main function of the overflow plate is to change the height of the mixed liquid, thereby adjusting the flocculation time, and the liquid level meter is used to detect the height of the mixed liquid in the stirring box 3. In this embodiment, the stirring box has multiple liquid outlets, and there are three here, which respectively divert the flocculated sewage to three upper and lower parallel concentration boxes 7. When there are multiple liquid outlets, a water distributor is also provided at the liquid outlet. The water distributor is N equally divided water outlets with the same serrated shape, which evenly distributes the mixed water into the concentration tank 7. At the same time, those skilled in the art can increase or decrease the liquid outlets according to actual conditions, which will not be elaborated here. The water distributor is an existing product and has not been improved, and can be purchased commercially.

[0030] Further, such as Figure 2As shown, the concentration mechanism includes a filter body 8, which is mounted on a rotating shaft, and a driven gear is provided at the end of the rotating shaft, and the driven gear is located outside the concentration tank 7. A reduction motor 19 is installed on the surface of the concentration tank 7, and the power output end of the reduction motor 19 is connected to the driving gear, and the driving gear and the driven gear are connected by a chain 20. A liquid level meter b9 is provided in the concentration tank 7, and an odor collection pipe b10 is provided on the concentration tank 7. Furthermore, the filter body 8 is distributed in a concave arc shape. Specifically, when the mixed liquid enters the concentration tank 7, the reduction motor 19 drives the driving gear to rotate, thereby driving the driven gear to rotate through the chain 20, and then driving the filter body 8 to rotate, and there is a gap between adjacent filter bodies 8. The filter body 8 is composed of a number of annular filter plates, and the annular filter plates include metal plates and plastic plates, wherein the metal plates and the plastic plates are distributed at intervals, and the diameter of the metal annular filter plates is larger than the diameter of the plastic annular filter plates. The plastic annular filter plates are provided with micron-level radial fixed channels. During the rotation of the filter body 8, the flocculated sludge will be separated from the solid by the rotation of the filter body 8 and the radial fixed channels. The liquid is collected by the liquid collecting plate 13 and then flows into the conduit, which is then led to the external filtrate outlet 24. The concentrated sludge enters the material guide cover 12 through the concentration tank outlet 11, and then enters the dehydration tank 14 through the material guide cover 12 for dehydration. In this embodiment, adjacent filter bodies 8 are arranged to interlock with each other, and their function is to rotate at a low speed when self-cleaning is required to complete self-cleaning. At the same time, since the concentration tank 7 does not require an extrusion function, it can rotate at an extremely slow speed to form a filtration channel, reducing power. Since the concentration and dehydration are carried out separately, the sludge coming out of the dehydration tank 14 is high-concentration sludge and can be directly used for extrusion. This reduces the number of original dehydration filters, thereby greatly reducing energy consumption and saving the construction cost of the concentration tank.

[0031] In this embodiment, if Figure 4 As shown, an upper filter body 23 and a lower filter body 15 are provided in the dewatering box 14. The upper filter body 23 and the lower filter body 15 are correspondingly installed on the rotating shaft. The end of the rotating shaft is connected to the power output end of the reduction motor b21. The reduction motor b21 is installed on the protective cover 22 outside the dewatering box 14. The upper filter body 23 rotates clockwise, and the lower filter body 15 rotates counterclockwise. The number of the lower filter bodies 15 is greater than the number of the upper filter bodies 23. The discharge port of the material guide cover 12 is located above the feed port of the lower filter body 15, and the mud outlet 18 is located at the discharge port of the lower filter body 15. A liquid level meter c16 is provided in the dewatering box 14. Furthermore, the upper filter body 23 is distributed in an upward convex arc shape, and the lower filter body 15 is distributed in a downward convex arc shape. Further, as Figure 5As shown, the pressure plate 17 includes a shell 118 and an adjusting rod 116, a spring 119 is arranged in the shell 118, the lower end of the spring 119 is connected to the pressure rod 120, a bearing bracket 121 is arranged at the lower end of the pressure rod 120, a bearing b122 is installed on the bearing bracket 121, the bearing b122 is pressed on the mud outlet 18, a threaded section 117 is opened on the upper part of the shell 118, a threaded section b corresponding to the threaded section 117 is opened on the side wall of the adjusting rod 116, and the end of the adjusting rod 116 is installed on the upper end of the spring 119. Specifically, when the concentrated sludge enters the dewatering box 14, the reduction motor b21 drives the upper filter body 23 and the lower filter body 15 to rotate. The structure of the upper filter body 23 and the lower filter body 15 is the same as that of the filter body 8, and they will not be repeated. During the rotation of the upper filter body 23 and the lower filter body 15, the sludge will be squeezed and dehydrated, and the water in the sludge will flow out through the gap between the lower filter body 15. The dehydrated sludge is discharged from the mud outlet 18. The main function of the pressure plate 17 is to press the mud outlet 18. That is to say, during the working process, the adjusting rod 116 is rotated up and down to adjust the pressure of the spring 119 on the pressure rod 120, and then the pressure of the bearing b122 on the mud outlet 18 is adjusted. Since the device adds a concentration tank, the sludge concentration entering the dehydration tank 14 is relatively high, and can be directly squeezed and dehydrated by the upper and lower rows of filters, reducing the length of the dehydration channel and the number of filters, shortening the sludge dehydration time, and at the same time, the upper filter 23 and the lower filter 15 will not be soaked in water, which is equivalent to achieving dry and wet separation.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sludge concentration and dehydration device, characterized in that: The invention comprises a mixer (26), a stirring box (3), a concentration box (7) and a dehydration box (14), wherein the inlet of the mixer (26) is connected to a sewage inlet pipe (1), the liquid outlet (112) of the mixer (26) is communicated with the inlet of the stirring box (3) through a pipeline, the outlet of the stirring box (3) is communicated with the concentration box (7) through a liquid outlet pipe (6), a concentration mechanism is arranged inside the concentration box (7), a liquid collecting plate (13) is arranged below the concentration mechanism, a conduit is arranged at the liquid outlet of the liquid collecting plate (13), and the conduit is connected to an external filtrate outlet. (24), a concentrating tank discharge port (11) is arranged on the side wall of the concentrating tank (7), a material guide cover (12) is arranged on the side of the concentrating tank (7), and the discharge end of the concentrating tank discharge port (11) is located in the material guide cover (12), the discharge port of the material guide cover (12) is connected to the dewatering tank (14), a pressure plate (17) is arranged on the upper part of the mud discharge port (18) on the dewatering tank (14), and the mixer (26), the stirring tank (3), the concentrating tank (7) and the dewatering tank (14) are all electrically connected to the control box (25).

2. The sludge concentration and dehydration device according to claim 1, characterized in that: The mixer (26) comprises a housing (103) and a pipeline mixing box, wherein the housing (103) is provided with a bearing (104), a stirring shaft (108) is provided in the housing (103), and the bearing (104) is installed at both ends of the stirring shaft (108), a partition (109), an impeller a (107) and an impeller b (106) are installed on the stirring shaft (108), and the impeller a (107) and the impeller b (106) are respectively located on both sides of the partition (109), and the sewage The water outlet of the inlet pipe (1) is in communication with the chamber where the impeller a (107) is located; a regulating valve (102) is provided on the sewage inlet pipe (1); a medicine inlet pipe (2) and a conduit b (110) are provided on the chamber where the impeller b (106) is located; the other end of the conduit b (110) is connected to the pipeline mixing box; a water inlet pipe (105) is provided on the outside of the shell (103); two ends of the water inlet pipe (105) are respectively in communication with the chamber where the impeller a (107) is located and the chamber where the impeller b (106) is located.

3. The sludge concentration and dehydration device according to claim 2, characterized in that: The pipeline mixing box is provided with a C chamber, a B chamber and an A chamber in order from the inside to the outside, the B chamber is provided with a swirl inlet a (115), the C chamber is provided with a swirl inlet b (114), the upper end of the C chamber is provided with a pressure release valve (111), the lower end of the C chamber is provided with the liquid outlet (112), and the liquid outlet (112) is provided with a regulating valve b (113).

4. The sludge concentration and dehydration device according to claim 1, characterized in that: A stirring motor (4) is arranged above the stirring box (3), the power output end of the stirring motor (4) is connected to a stirring rod, the stirring rod is located in the stirring box (3), an observation window and an odor collection pipe a are arranged on the upper part of the stirring box (3), and a liquid level meter is arranged in the stirring box (3).

5. The sludge concentration and dehydration device according to claim 1, characterized in that: The concentrating mechanism comprises a filter body (8), the filter body (8) is mounted on a rotating shaft, and a driven gear is arranged at the end of the rotating shaft, the driven gear is located outside the concentrating tank (7), a reduction motor (19) is mounted on the surface of the concentrating tank (7), the power output end of the reduction motor (19) is connected to a driving gear, and the driving gear and the driven gear are connected by a chain (20), a liquid level meter b (9) is arranged in the concentrating tank (7), and an odor collecting pipe b (10) is arranged on the concentrating tank (7).

6. The sludge concentration and dehydration device according to claim 5, characterized in that: The filter body (8) is distributed in a concave arc shape.

7. The sludge concentration and dehydration device according to claim 6, characterized in that: An upper filter (23) and a lower filter (15) are arranged in the dewatering box (14). The upper filter (23) and the lower filter (15) are respectively mounted on a rotating shaft. The end of the rotating shaft is connected to the power output end of a reduction motor b (21). The reduction motor b (21) is mounted on a protective cover (22) outside the dewatering box (14). The upper filter (23) rotates clockwise, and the lower filter (15) rotates counterclockwise. The number of the lower filter (15) is greater than that of the upper filter (23). The discharge port of the material guide cover (12) is located above the feed port of the lower filter (15). The mud discharge port (18) is located at the discharge port of the lower filter (15). A liquid level meter c (16) is arranged in the dewatering box (14).

8. The sludge concentration and dehydration device according to claim 7, characterized in that: The upper filter bodies (23) are distributed in an upward convex arc shape, and the lower filter bodies (15) are distributed in a downward convex arc shape.

9. The sludge concentration and dehydration device according to claim 8, characterized in that: The pressure plate (17) comprises a shell (118) and an adjusting rod (116). A spring (119) is arranged in the shell (118). The lower end of the spring (119) is connected to the pressure rod (120). The lower end of the pressure rod (120) is provided with a bearing bracket (121). A bearing b (122) is installed on the bearing bracket (121). The bearing b (122) is pressed on the mud outlet (18). A threaded section (117) is provided on the upper part of the shell (118). A threaded section b corresponding to the threaded section (117) is provided on the side wall of the adjusting rod (116). The end of the adjusting rod (116) is installed on the upper end of the spring (119).

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