Sludge thickening and dewatering device

Abstract

The utility model 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, and a concentration mechanism is arranged in the concentration box. A concentration box discharging opening is formed in the side wall of the concentration box, a material guiding cover is arranged on the side face of the concentration box, a discharging opening of the material guiding 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 utility model relates to the technical field of sludge thickening and dewatering equipment, in particular to a sludge thickening and dewatering device. Background Technique

[0002] At present, the types of dehydrators include centrifugal sludge dehydrators, belt sludge dehydrators, spiral press sludge dehydrators, etc. The centrifugal dehydrator relies on the motor to drive the drum to rotate at a high speed to form a centrifugal force for solid-liquid separation, with high energy consumption, high purchase and maintenance costs, high noise, and complex operation; the belt dehydrator relies on the filter belt to squeeze for solid-liquid separation, and requires continuous high-pressure cleaning water to wash the filter cloth during operation, resulting in waste of water resources, and the splashing of the cleaning water affects the on-site environment, resulting in a poor working environment; the spiral press sludge dehydrator is composed of an unequal pitch spiral, filter plates and support discs. During operation, the rotation of the spiral shaft drives the formation of variable gaps between the filter plates, and the water is discharged from the gaps, and the sludge is compressed and discharged by the unequal pitch spiral. The disadvantage of this structure is that it cannot adapt to some highly abrasive sludge such as tap water sediment, etc. Abrasion will cause the spiral to become thinner and smaller, the filter body gap to become larger, and frequent maintenance, which will affect the sludge dewatering effect. For some highly viscous sludge, it is easy to fill the spiral and the gap, resulting in shutdown accidents such as shaft seizure. In addition, this kind of equipment also requires a large amount of water to be continuously cleaned, causing secondary pollution and increasing energy consumption.

[0003] At the same time, the existing sludge dehydrators have relatively high requirements for the solid content of sludge, generally about 1%-3%. When the solid content of the sewage entering the sludge dehydrator is lower than 1%, a sludge thickening tank needs to be added in front of the equipment, which not only increases the floor area of the equipment, but also increases the energy consumption. However, due to the lack of an efficient thickening mechanism, the current sludge dehydrators have relatively low treatment efficiency, relatively high sludge moisture content, poor dewatering effect, and cannot adapt to the dehydration of large-flow and low-concentration sludge. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a sludge thickening and dewatering device.

[0005] The object of the present utility model is achieved by the following technical solutions: A sludge thickening and dewatering device includes a mixer, a stirring tank, a thickening tank and a dewatering tank. The inlet of the mixer is connected to the sewage inlet pipe. The liquid outlet of the mixer is communicated with the inlet of the stirring tank through a pipeline. The outlet of the stirring tank is communicated with the thickening tank through a liquid outlet pipe. A thickening mechanism is arranged in the thickening tank. A liquid collecting plate is arranged below the thickening mechanism. The liquid outlet of the liquid collecting plate is provided with a conduit, and the conduit is communicated with an external filtrate outlet. A thickening tank discharge port is arranged on the side wall of the thickening tank. A material guiding cover is arranged on the side of the thickening tank, and the discharging end of the thickening tank discharge port is located inside the material guiding cover. The discharging port of the material guiding cover is communicated with the dewatering tank. A pressing plate is arranged above the sludge outlet on the dewatering tank. The mixer, the stirring tank, the thickening tank and the dewatering tank are all electrically connected to the control box.

[0006] Preferably, the mixer includes a shell and a pipeline mixing tank. Bearings are arranged on the shell. A stirring shaft is arranged inside the shell, and the bearings are installed at both ends of the stirring shaft. A partition plate, 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 plate. The water outlet of the sewage inlet pipe is communicated with the chamber where the impeller a is located. A regulating valve is arranged on the sewage inlet pipe. A chemical feeding pipe and a conduit b are arranged on the chamber where the impeller b is located. The other end of the conduit b is connected to the pipeline mixing tank. A water inlet pipe is arranged outside the shell, and both ends of the water inlet pipe are respectively communicated with the chamber where the impeller a is located and the chamber where the impeller b is located.

[0007] Preferably, a C chamber, a B chamber and an A chamber are sequentially arranged inside the pipeline mixing tank from the inside to the outside. A swirl inlet a is arranged on the B chamber. A swirl inlet b is arranged on the C chamber. A pressure release valve is arranged at the upper end of the C chamber. A liquid outlet is arranged at the lower end of the C chamber. A regulating valve b is arranged on the liquid outlet.

[0008] Preferably, a stirring motor is arranged above the stirring tank. The power output end of the stirring motor is connected to a stirring rod. The stirring rod is located inside the stirring tank. An overflow plate is arranged inside the stirring tank. An observation window and an odor collection pipe a are arranged at the upper part of the stirring tank. A liquid level gauge is arranged inside the stirring tank.

[0009] Preferably, the thickening mechanism includes a filter body. The filter body is installed on a rotating shaft, and a driven gear is arranged at the end of the rotating shaft. The driven gear is located outside the thickening tank. A reduction motor is installed on the surface of the thickening tank. The power output end of the reduction motor is connected to a driving gear, and the driving gear and the driven gear are connected by a chain. A liquid level gauge b is arranged inside the thickening tank. An odor collection pipe b is arranged on the thickening tank.

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

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

[0012] Preferably, the upper row filter body is distributed in a convex arc shape, and the lower row filter body is distributed in a concave arc shape.

[0013] Preferably, the pressing plate includes a housing and an adjusting rod. A spring is arranged in the housing. The lower end of the spring is connected to the pressing rod. The lower end of the pressing rod is provided with a bearing bracket. A bearing b is installed on the bearing bracket. The bearing b presses on the mud discharge port. A threaded section is opened at the upper part of the housing. A threaded section b corresponding to the threaded section is opened on the side wall of the adjusting rod. The end of the adjusting rod is installed at the upper end of the spring.

[0014] The utility model has the following advantages: The utility model first performs primary flocculation on sewage and drugs through a mixer, and then introduces the mixed liquid into the stirring tank for secondary flocculation, thereby enhancing the flocculation effect of the sludge, facilitating dehydration. Subsequently, the sludge passes through the concentration mechanism, and part of the clean water flows out from the liquid collecting plate below the concentration mechanism. The concentrated sludge enters the dewatering tank, thereby concentrating the low-concentration sludge, increasing the solid content rate of the sludge, improving the processing capacity of the dewatering tank. The dewatering tank further reduces the water content of the sludge, and the lumpy sludge finally discharges from the mud discharge port. This device is suitable for dehydrating large-flow and low-concentration sludge. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 is a schematic structural diagram of the back of the sludge concentration and dewatering device;

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

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

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

[0020] In the figure, 1 - sewage inlet pipe, 2 - chemical inlet pipe, 3 - mixing tank, 4 - mixing motor, 6 - liquid outlet pipe, 7 - concentration tank, 8 - filter body, 9 - liquid level gauge b, 10 - odor collection pipe b, 11 - concentration tank discharge port, 12 - material guiding cover, 13 - liquid collection plate, 14 - dehydration tank, 15 - lower row filter body, 16 - liquid level gauge c, 17 - pressing plate, 18 - mud outlet, 19 - reduction motor, 20 - chain, 21 - reduction motor b, 22 - protective cover, 23 - upper row filter body, 24 - filtrate outlet, 25 - control box, 26 - mixer, 102 - regulating valve, 103 - housing, 104 - bearing, 105 - water inlet pipe, 106 - impeller b, 107 - impeller a, 108 - mixing shaft, 109 - partition plate, 110 - conduit b, 111 - pressure relief valve, 112 - liquid outlet, 113 - regulating valve b, 114 - swirl inlet b, 115 - swirl inlet a, 116 - adjusting rod, 117 - threaded section, 118 - outer shell, 119 - spring, 120 - pressing rod, 121 - bearing support, 122 - bearing b. Detailed implementation manners

[0021] To make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0023] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0024] It should be noted that: similar reference numerals and letters denote similar items in the following accompanying drawings. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in subsequent accompanying drawings.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "install", "connect", "couple" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In this embodiment, as Figure 1As shown, a sludge thickening and dewatering device includes a mixer 26, a stirring tank 3, a thickening tank 7 and a dewatering 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, and the outlet of the stirring tank 3 is communicated with the thickening tank 7 through the liquid outlet pipe 6. A thickening mechanism is provided in the thickening tank 7, and a liquid collecting plate 13 is provided below the thickening mechanism. The liquid outlet of the liquid collecting plate 13 is provided with a conduit, which is communicated with the external filtrate outlet 24. A thickening tank discharge port 11 is provided on the side wall of the thickening tank 7, and a material guide cover 12 is provided 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 dewatering tank 14, and a pressing plate 17 is provided on the upper part of the mud outlet 18 on the dewatering tank 14. The mixer 26, the stirring tank 3, the thickening tank 7 and the dewatering tank 14 are all electrically connected to the control box 25. The sewage and pharmaceuticals are initially flocculated by the mixer 26, and the mixed solution is then introduced into the mixing tank 3 for secondary flocculation, thereby enhancing the flocculation effect of the sludge and facilitating dehydration. The sludge then passes through the concentrating mechanism, with some clean water flowing out of the liquid collecting plate 13 below the concentrating mechanism. The concentrated sludge enters the dewatering tank 14, thereby concentrating the low-concentration sludge, increasing the solid content of the sludge and increasing the processing capacity of the dewatering tank 14. The dewatering tank 14 further reduces the water content of the sludge, and the agglomerated sludge is ultimately discharged from the mud outlet 18. This device is suitable for dewatering high-flow, low-concentration sludge. In this embodiment, the start and stop of the corresponding valves and drive motors involved in the mixer 26, the mixing tank 3, the concentrating tank 7, and the dewatering tank 14 are all controlled by the control box 25.

[0028] Further, such as Figure 3As shown, the mixer 26 includes a housing 103 and a pipeline mixing tank. A bearing 104 is provided on the housing 103. A stirring shaft 108 is arranged inside 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. The water outlet of the sewage inlet pipe 1 is communicated with the chamber where the impeller a 107 is located. A regulating valve 102 is provided on the sewage inlet pipe 1. An inlet chemical 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 tank. A water inlet pipe 105 is arranged outside the housing 103, and both ends of the water inlet pipe 105 are respectively communicated with the chamber where the impeller a 107 is located and the chamber where the impeller b 106 is located. Further, a C chamber, a B chamber and an A chamber are sequentially arranged in the pipeline mixing tank from the inside to the outside. A tangential inlet a 115 is provided on the B chamber. A tangential inlet b 114 is provided on the C chamber. A pressure relief valve 111 is provided at the upper end of the C chamber. A liquid outlet 112 is provided at the lower end of the C chamber. A regulating valve b 113 is provided on the liquid outlet 112. Specifically, the sewage to be flocculated enters the chamber where the impeller a 107 is located from the sewage inlet pipe 1. The impeller a 107 drives the stirring shaft 108 to rotate under the action of hydraulic force, thereby driving the impeller b 106 to rotate. The sewage in the chamber where the impeller a 107 is located enters the chamber where the impeller b 106 is located, that is, the stirring chamber, through the water inlet pipe 105. At the same time, the chemical agent enters the stirring chamber through the inlet chemical pipe 2, contacts and stirs with the sewage. The sewage that has started to flocculate after preliminary mixing enters the pipeline mixing tank through the conduit b 110. The sewage and the chemical agent quickly swirl and fill in the A chamber, and then enter the B chamber at a tangential position through the tangential inlet a 115. The sewage and the chemical agent quickly swirl and fill in the B chamber, and then enter the C chamber at a tangential position through the tangential inlet b 114. The sewage and the chemical agent continue to swirl along the pipe wall in the C chamber until the C chamber is filled and then enter the mixing tank 3 from the liquid outlet 112. Among them, a pressure relief valve 111 is provided at the upper end of the C chamber, and its function is to protect the equipment and pipeline from pressure. A regulating valve 102 is provided on the sewage inlet pipe 1, and the function of the regulating valve 102 is to adjust the inlet water pressure, thereby adjusting the rotation speed of the impeller a 107.

[0029] In this embodiment, a stirring motor 4 is provided above the stirring tank 3. The power output end of the stirring motor 4 is connected to a stirring rod, and the stirring rod is located inside the stirring tank 3. An overflow plate is provided inside the stirring tank 3. An observation window and an odor collection pipe a are provided in the upper part of the stirring tank 3. A liquid level gauge is provided inside the stirring tank 3. Specifically, when the mixed liquid enters the stirring tank 3, the stirring motor 4 drives the stirring rod to rotate at a low speed, making the contact between the sewage and the medicament more sufficient, performing sewage flocculation at a low speed, not damaging the molecular chain of the polymer medicament, increasing the flocculation effect, that is, increasing the formation speed of flocs in the sewage, which is beneficial to subsequent sludge thickening. The main function of the overflow plate is to change the height of the mixed liquid, thereby adjusting the flocculation time. The liquid level gauge is used to detect the height of the mixed liquid in the stirring tank 3. In this embodiment, the stirring tank has multiple liquid outlets. Here, there are three, which respectively divert the flocculated sewage into three concentric tanks 7 connected in parallel up and down. When there are multiple liquid outlets, a water distributor is also provided at the liquid outlet. The water distributor has N equally divided water outlets with the same serrated shape, evenly diverting the mixed water into the concentric tank 7. At the same time, those skilled in the art can increase or decrease the liquid outlets according to the actual situation, which will not be elaborated here. The water distributor is an existing product and has not been improved, and can be obtained through commercial purchase.

[0030] Further, as Figure 2As shown in the figure, the concentration mechanism includes a filter body 8 which is installed on a rotating shaft. 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. 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 gauge b9 is provided in the concentration tank 7, and an odor collection pipe b10 is provided on the concentration tank 7. Further, 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. There is a gap between adjacent filter bodies 8. The filter body 8 is composed of a number of annular filter plates. The annular filter plates include metal plates and plastic plates. The metal plates and plastic plates are distributed at intervals, and the diameter of the annular filter plates made of metal is larger than that of the annular filter plates made of plastic. Micron-scale radial fixed channels are provided on the annular filter plates made of plastic. During the rotation of the filter body 8, the flocculated sludge will be separated into solid and liquid through the rotation of the filter body 8 and the radial fixed channels. The liquid is collected by the liquid collection plate 13 and flows into the conduit, and is led to the external filtrate outlet 24 through the conduit. The concentrated sludge enters the guide hood 12 through the concentration tank discharge port 11, and then enters the dehydration tank 14 through the guide hood 12 for dehydration. In this embodiment, adjacent filter bodies 8 are arranged in an interlocking manner. Its function is to rotate at a low speed for self-cleaning when self-cleaning is required. 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 the power. Because concentration and dehydration are carried out separately, the sludge entering the dehydration tank 14 is high-concentration sludge and can be directly used for extrusion. In this way, the number of the original dehydration filter bodies is reduced, so the energy consumption is greatly reduced, and at the same time, the construction cost of the concentration tank is saved.

[0031] In this embodiment, as Figure 4 shown, an upper row filter body 23 and a lower row filter body 15 are provided in the dehydration tank 14. Both the upper row filter body 23 and the lower row filter body 15 are correspondingly installed on the rotating shaft. The end of the rotating shaft is connected to the power output end of a reduction motor b21. The reduction motor b21 is installed on the protective cover 22 outside the dehydration tank 14. The upper row filter body 23 rotates clockwise, the lower row filter body 15 rotates counterclockwise, and the number of the lower row filter bodies 15 is more than that of the upper row filter bodies 23. The discharge port of the guide hood 12 is located above the feed port of the lower row filter body 15, and the mud outlet 18 is located at the discharge port of the lower row filter body 15. A liquid level gauge c16 is provided in the dehydration tank 14. Further, the upper row filter body 23 is distributed in a convex arc shape, and the lower row filter body 15 is distributed in a concave arc shape. Further, as Figure 5As shown, the pressing plate 17 includes a housing 118 and an adjusting rod 116. A spring 119 is arranged inside the housing 118. The lower end of the spring 119 is connected to a pressing rod 120. The lower end of the pressing rod 120 is provided with a bearing bracket 121. A bearing b 122 is installed on the bearing bracket 121. The bearing b 122 presses on the sludge outlet 18. A threaded section 117 is provided at the upper part of the housing 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 at the upper end of the spring 119. Specifically, when the concentrated sludge enters the dewatering tank 14, the reduction motor b 21 drives the upper row of filter bodies 23 and the lower row of filter bodies 15 to rotate. The structures of the upper row of filter bodies 23 and the lower row of filter bodies 15 are the same as those of the filter body 8, so no further description will be given. During the rotation of the upper row of filter bodies 23 and the lower row of filter bodies 15, the sludge will be squeezed and dehydrated. The water in the sludge flows out through the gaps between the lower row of filter bodies 15. The dehydrated sludge is discharged from the sludge outlet 18. The main function of the pressing plate 17 is to press the sludge outlet 18. That is to say, during the working process, the adjusting rod 116 is rotated to move up and down, so as to adjust the pressure of the spring 119 on the pressing rod 120, and further adjust the pressure of the bearing b 122 on the sludge outlet 18. Since a concentration tank is added to this device, the concentration of the sludge entering the dewatering tank 14 is relatively high, and it can be directly squeezed and dehydrated by the upper and lower rows of filter bodies, reducing the length of the dehydration channel and the number of filter bodies, shortening the dehydration time of the sludge. At the same time, the upper row of filter bodies 23 and the lower row of filter bodies 15 will not be soaked by water, which is equivalent to achieving dry-wet separation.

[0032] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A sludge concentration and dehydration device, characterized by: 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 the 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 provided in the concentration box (7), a liquid collecting plate (13) is provided below the concentration mechanism, and a conduit is provided at the liquid outlet of the liquid collecting plate (13), and the conduit is connected to the external filtrate outlet. (24) is connected, a concentration box discharge port (11) is provided on the side wall of the concentration box (7), a material guide cover (12) is provided on the side of the concentration box (7), and the discharge end of the concentration box 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 box (14), and a pressure plate (17) is provided on the upper part of the mud outlet (18) on the dewatering box (14), and the mixer (26), the stirring box (3), the concentration box (7) and the dewatering box (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) includes a housing (103) and a pipeline mixing box. 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). The impeller a (107) and the impeller b (106) are respectively located on both sides of the partition (109). 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). The 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 sequence 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 provided above the stirring box (3), a 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 provided on the upper part of the stirring box (3), and a liquid level meter is provided 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 provided at the end of the rotating shaft, the driven gear is located outside the concentrating tank (7), a reduction motor (19) is installed on the surface of the concentrating tank (7), 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 gauge b (9) is provided in the concentrating tank (7), and an odor collection pipe b (10) is provided 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 provided 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 the number of the upper filter (23). The discharge port of the guide cover (12) is located above the feed port of the lower filter (15). The mud outlet (18) is located at the discharge port of the lower filter (15). A liquid level meter c (16) is provided 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) includes a shell (118) and an adjusting rod (116). A spring (119) is provided 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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